From 00abb999e3c051c5c7c6349c385d77d25dea8e7f Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Wed, 1 Jul 2020 18:24:00 +0200
Subject: v2.66d init

---
 docs/Changelog.md | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index afb9dea6..57b2b4a2 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -9,6 +9,10 @@ Want to stay in the loop on major new features? Join our mailing list by
 sending a mail to <afl-users+subscribe@googlegroups.com>.
 
 
+### Version ++2.66d (devel)
+  - ... ?
+
+
 ### Version ++2.66c (release)
   - renamed the main branch on Github to "stable"
   - renamed master/slave to main/secondary
-- 
cgit 1.4.1


From 83790d65afb52a055d093451a50ce55690a25002 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Wed, 8 Jul 2020 11:16:39 +0200
Subject: eliminate race condition for cpu affinity on -M/-S

---
 docs/Changelog.md   |  4 ++-
 include/config.h    |  4 +++
 src/afl-fuzz-init.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++-------
 src/afl-fuzz.c      | 24 +++++++------
 4 files changed, 105 insertions(+), 24 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index 57b2b4a2..18e4e97e 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -10,7 +10,9 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
 
 
 ### Version ++2.66d (devel)
-  - ... ?
+  - afl-fuzz:
+     - eliminated CPU affinity race condition for -S/-M runs
+  - small fixes to afl-plot, afl-whatsup and man page creation
 
 
 ### Version ++2.66c (release)
diff --git a/include/config.h b/include/config.h
index 7de74009..4503c3e9 100644
--- a/include/config.h
+++ b/include/config.h
@@ -380,6 +380,10 @@
 
 #define CMPLOG_SHM_ENV_VAR "__AFL_CMPLOG_SHM_ID"
 
+/* CPU Affinity lockfile env var */
+
+#define CPU_AFFINITY_ENV_VAR "__AFL_LOCKFILE"
+
 /* Uncomment this to use inferior block-coverage-based instrumentation. Note
    that you need to recompile the target binary for this to have any effect: */
 
diff --git a/src/afl-fuzz-init.c b/src/afl-fuzz-init.c
index a2e849dc..e51b4729 100644
--- a/src/afl-fuzz-init.c
+++ b/src/afl-fuzz-init.c
@@ -36,14 +36,11 @@ void bind_to_free_cpu(afl_state_t *afl) {
   #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
   cpu_set_t c;
   #elif defined(__NetBSD__)
-  cpuset_t *         c;
+  cpuset_t *c;
   #elif defined(__sun)
-  psetid_t            c;
+  psetid_t c;
   #endif
 
-  u8  cpu_used[4096] = {0};
-  u32 i;
-
   if (afl->cpu_core_count < 2) { return; }
 
   if (afl->afl_env.afl_no_affinity) {
@@ -53,13 +50,46 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
   }
 
+  u8  cpu_used[4096] = {0}, lockfile[PATH_MAX] = "";
+  u32 i;
+
+  if (afl->sync_id) {
+
+    s32 lockfd, first = 1;
+
+    snprintf(lockfile, sizeof(lockfile), "%s/.affinity_lock", afl->sync_dir);
+    setenv(CPU_AFFINITY_ENV_VAR, lockfile, 1);
+
+    do {
+
+      if ((lockfd = open(lockfile, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0) {
+
+        if (first) {
+
+          WARNF("CPU affinity lock file present, waiting ...");
+          first = 0;
+
+        }
+
+        usleep(1000);
+
+      }
+
+    } while (lockfd < 0);
+
+    close(lockfd);
+
+  }
+
   #if defined(__linux__)
+
   DIR *          d;
   struct dirent *de;
   d = opendir("/proc");
 
   if (!d) {
 
+    if (lockfile[0]) unlink(lockfile);
     WARNF("Unable to access /proc - can't scan for free CPU cores.");
     return;
 
@@ -67,11 +97,6 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
   ACTF("Checking CPU core loadout...");
 
-  /* Introduce some jitter, in case multiple AFL tasks are doing the same
-     thing at the same time... */
-
-  usleep(R(1000) * 250);
-
   /* Scan all /proc/<pid>/status entries, checking for Cpus_allowed_list.
      Flag all processes bound to a specific CPU using cpu_used[]. This will
      fail for some exotic binding setups, but is likely good enough in almost
@@ -114,20 +139,29 @@ void bind_to_free_cpu(afl_state_t *afl) {
   }
 
   closedir(d);
+
   #elif defined(__FreeBSD__) || defined(__DragonFly__)
+
   struct kinfo_proc *procs;
   size_t             nprocs;
   size_t             proccount;
   int                s_name[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL};
   size_t             s_name_l = sizeof(s_name) / sizeof(s_name[0]);
 
-  if (sysctl(s_name, s_name_l, NULL, &nprocs, NULL, 0) != 0) return;
+  if (sysctl(s_name, s_name_l, NULL, &nprocs, NULL, 0) != 0) {
+
+    if (lockfile[0]) unlink(lockfile);
+    return;
+
+  }
+
   proccount = nprocs / sizeof(*procs);
   nprocs = nprocs * 4 / 3;
 
   procs = ck_alloc(nprocs);
   if (sysctl(s_name, s_name_l, procs, &nprocs, NULL, 0) != 0) {
 
+    if (lockfile[0]) unlink(lockfile);
     ck_free(procs);
     return;
 
@@ -136,6 +170,7 @@ void bind_to_free_cpu(afl_state_t *afl) {
   for (i = 0; i < proccount; i++) {
 
     #if defined(__FreeBSD__)
+
     if (!strcmp(procs[i].ki_comm, "idle")) continue;
 
     // fix when ki_oncpu = -1
@@ -145,16 +180,21 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
     if (oncpu != -1 && oncpu < sizeof(cpu_used) && procs[i].ki_pctcpu > 60)
       cpu_used[oncpu] = 1;
+
     #elif defined(__DragonFly__)
+
     if (procs[i].kp_lwp.kl_cpuid < sizeof(cpu_used) &&
         procs[i].kp_lwp.kl_pctcpu > 10)
       cpu_used[procs[i].kp_lwp.kl_cpuid] = 1;
+
     #endif
 
   }
 
   ck_free(procs);
+
   #elif defined(__NetBSD__)
+
   struct kinfo_proc2 *procs;
   size_t              nprocs;
   size_t              proccount;
@@ -163,13 +203,20 @@ void bind_to_free_cpu(afl_state_t *afl) {
       CTL_KERN, KERN_PROC2, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), 0};
   size_t s_name_l = sizeof(s_name) / sizeof(s_name[0]);
 
-  if (sysctl(s_name, s_name_l, NULL, &nprocs, NULL, 0) != 0) return;
+  if (sysctl(s_name, s_name_l, NULL, &nprocs, NULL, 0) != 0) {
+
+    if (lockfile[0]) unlink(lockfile);
+    return;
+
+  }
+
   proccount = nprocs / sizeof(struct kinfo_proc2);
   procs = ck_alloc(nprocs * sizeof(struct kinfo_proc2));
   s_name[5] = proccount;
 
   if (sysctl(s_name, s_name_l, procs, &nprocs, NULL, 0) != 0) {
 
+    if (lockfile[0]) unlink(lockfile);
     ck_free(procs);
     return;
 
@@ -183,7 +230,9 @@ void bind_to_free_cpu(afl_state_t *afl) {
   }
 
   ck_free(procs);
+
   #elif defined(__sun)
+
   kstat_named_t *n;
   kstat_ctl_t *  m;
   kstat_t *      k;
@@ -198,6 +247,7 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
   if (!k) {
 
+    if (lockfile[0]) unlink(lockfile);
     kstat_close(m);
     return;
 
@@ -205,6 +255,7 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
   if (kstat_read(m, k, NULL)) {
 
+    if (lockfile[0]) unlink(lockfile);
     kstat_close(m);
     return;
 
@@ -220,6 +271,7 @@ void bind_to_free_cpu(afl_state_t *afl) {
     k = kstat_lookup(m, "cpu_stat", i, NULL);
     if (kstat_read(m, k, &cs)) {
 
+      if (lockfile[0]) unlink(lockfile);
       kstat_close(m);
       return;
 
@@ -233,6 +285,7 @@ void bind_to_free_cpu(afl_state_t *afl) {
   }
 
   kstat_close(m);
+
   #else
     #warning \
         "For this platform we do not have free CPU binding code yet. If possible, please supply a PR to https://github.com/AFLplusplus/AFLplusplus"
@@ -241,7 +294,9 @@ void bind_to_free_cpu(afl_state_t *afl) {
   size_t cpu_start = 0;
 
   try:
+
   #if !defined(__ANDROID__)
+
     for (i = cpu_start; i < afl->cpu_core_count; i++) {
 
       if (!cpu_used[i]) { break; }
@@ -251,6 +306,7 @@ void bind_to_free_cpu(afl_state_t *afl) {
   if (i == afl->cpu_core_count) {
 
   #else
+
     for (i = afl->cpu_core_count - cpu_start - 1; i > -1; i--)
       if (!cpu_used[i]) break;
   if (i == -1) {
@@ -274,18 +330,25 @@ void bind_to_free_cpu(afl_state_t *afl) {
   afl->cpu_aff = i;
 
   #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
+
   CPU_ZERO(&c);
   CPU_SET(i, &c);
+
   #elif defined(__NetBSD__)
+
   c = cpuset_create();
   if (c == NULL) PFATAL("cpuset_create failed");
   cpuset_set(i, c);
+
   #elif defined(__sun)
+
 pset_create(&c);
 if (pset_assign(c, i, NULL)) PFATAL("pset_assign failed");
+
   #endif
 
   #if defined(__linux__)
+
   if (sched_setaffinity(0, sizeof(c), &c)) {
 
     if (cpu_start == afl->cpu_core_count) {
@@ -302,6 +365,7 @@ if (pset_assign(c, i, NULL)) PFATAL("pset_assign failed");
   }
 
   #elif defined(__FreeBSD__) || defined(__DragonFly__)
+
   if (pthread_setaffinity_np(pthread_self(), sizeof(c), &c)) {
 
     if (cpu_start == afl->cpu_core_count)
@@ -314,6 +378,7 @@ if (pset_assign(c, i, NULL)) PFATAL("pset_assign failed");
   }
 
   #elif defined(__NetBSD__)
+
 if (pthread_setaffinity_np(pthread_self(), cpuset_size(c), c)) {
 
   if (cpu_start == afl->cpu_core_count)
@@ -326,7 +391,9 @@ if (pthread_setaffinity_np(pthread_self(), cpuset_size(c), c)) {
 }
 
 cpuset_destroy(c);
+
   #elif defined(__sun)
+
 if (pset_bind(c, P_PID, getpid(), NULL)) {
 
   if (cpu_start == afl->cpu_core_count)
@@ -339,11 +406,17 @@ if (pset_bind(c, P_PID, getpid(), NULL)) {
 }
 
 pset_destroy(c);
+
   #else
+
   // this will need something for other platforms
   // TODO: Solaris/Illumos has processor_bind ... might worth a try
+
   #endif
 
+  if (lockfile[0]) unlink(lockfile);
+  // we leave the environment variable to ensure a cleanup for other processes
+
 }
 
 #endif                                                     /* HAVE_AFFINITY */
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index e4e2669c..f7f247f3 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -42,19 +42,21 @@ static void at_exit() {
 
   int   i;
   char *list[4] = {SHM_ENV_VAR, SHM_FUZZ_ENV_VAR, CMPLOG_SHM_ENV_VAR, NULL};
-  char *ptr = getenv("__AFL_TARGET_PID1");
+  char *ptr;
 
+  ptr = getenv(CPU_AFFINITY_ENV_VAR);
+  if (ptr && *ptr) unlink(ptr);
+
+  ptr = getenv("__AFL_TARGET_PID1");
   if (ptr && *ptr && (i = atoi(ptr)) > 0) kill(i, SIGKILL);
 
   ptr = getenv("__AFL_TARGET_PID2");
-
   if (ptr && *ptr && (i = atoi(ptr)) > 0) kill(i, SIGKILL);
 
   i = 0;
   while (list[i] != NULL) {
 
     ptr = getenv(list[i]);
-
     if (ptr && *ptr) {
 
 #ifdef USEMMAP
@@ -1011,17 +1013,19 @@ int main(int argc, char **argv_orig, char **envp) {
 
   }
 
+  check_crash_handling();
+  check_cpu_governor(afl);
+
   get_core_count(afl);
 
+  atexit(at_exit);
+
+  setup_dirs_fds(afl);
+
   #ifdef HAVE_AFFINITY
   bind_to_free_cpu(afl);
   #endif                                                   /* HAVE_AFFINITY */
 
-  check_crash_handling();
-  check_cpu_governor(afl);
-
-  atexit(at_exit);
-
   afl->fsrv.trace_bits =
       afl_shm_init(&afl->shm, afl->fsrv.map_size, afl->non_instrumented_mode);
 
@@ -1038,12 +1042,10 @@ int main(int argc, char **argv_orig, char **envp) {
 
   }
 
-  setup_dirs_fds(afl);
-
   if (afl->is_secondary_node && check_main_node_exists(afl) == 0) {
 
     WARNF("no -M main node found. You need to run one main instance!");
-    sleep(5);
+    sleep(3);
 
   }
 
-- 
cgit 1.4.1


From b126a5d5a8d90dcc10ccb890b379c3dfdc5cf8d4 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Sun, 12 Jul 2020 13:44:25 +0200
Subject: LTO: autodict default, instrim disabled

---
 docs/Changelog.md                            |   5 ++
 llvm_mode/afl-clang-fast.c                   |  20 ++---
 llvm_mode/afl-llvm-lto-instrim.so.cc         |   6 +-
 llvm_mode/afl-llvm-lto-instrumentation.so.cc |   6 +-
 llvm_mode/split-compares-pass.so.cc          | 107 +++++++++++++++++----------
 5 files changed, 86 insertions(+), 58 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index 18e4e97e..b0bda6dc 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -12,6 +12,11 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
 ### Version ++2.66d (devel)
   - afl-fuzz:
      - eliminated CPU affinity race condition for -S/-M runs
+  - llvm_mode:
+     - fix for laf-intel float splitting
+     - LTO: autodictionary mode is a default
+     - LTO: instrim instrumentation disabled, only classic support used
+            as it is always better
   - small fixes to afl-plot, afl-whatsup and man page creation
 
 
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index fa15a278..8823b6a5 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -311,12 +311,15 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
     cc_params[cc_par_cnt++] = alloc_printf("-fuse-ld=%s", AFL_REAL_LD);
     cc_params[cc_par_cnt++] = "-Wl,--allow-multiple-definition";
-    if (instrument_mode == INSTRUMENT_CFG)
-      cc_params[cc_par_cnt++] =
-          alloc_printf("-Wl,-mllvm=-load=%s/afl-llvm-lto-instrim.so", obj_path);
-    else
-      cc_params[cc_par_cnt++] = alloc_printf(
-          "-Wl,-mllvm=-load=%s/afl-llvm-lto-instrumentation.so", obj_path);
+    /*
+        The current LTO instrim mode is not good, so we disable it
+        if (instrument_mode == INSTRUMENT_CFG)
+          cc_params[cc_par_cnt++] =
+              alloc_printf("-Wl,-mllvm=-load=%s/afl-llvm-lto-instrim.so",
+       obj_path); else
+    */
+    cc_params[cc_par_cnt++] = alloc_printf(
+        "-Wl,-mllvm=-load=%s/afl-llvm-lto-instrumentation.so", obj_path);
     cc_params[cc_par_cnt++] = lto_flag;
 
   } else {
@@ -378,9 +381,8 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
     if (!strcmp(cur, "-Wl,-z,defs") || !strcmp(cur, "-Wl,--no-undefined"))
       continue;
-      
-    if (lto_mode && !strncmp(cur, "-fuse-ld=", 9))
-      continue;
+
+    if (lto_mode && !strncmp(cur, "-fuse-ld=", 9)) continue;
 
     cc_params[cc_par_cnt++] = cur;
 
diff --git a/llvm_mode/afl-llvm-lto-instrim.so.cc b/llvm_mode/afl-llvm-lto-instrim.so.cc
index ca2b5886..880963ac 100644
--- a/llvm_mode/afl-llvm-lto-instrim.so.cc
+++ b/llvm_mode/afl-llvm-lto-instrim.so.cc
@@ -73,7 +73,7 @@ struct InsTrimLTO : public ModulePass {
  protected:
   uint32_t function_minimum_size = 1;
   char *   skip_nozero = NULL;
-  int      afl_global_id = 1, debug = 0, autodictionary = 0;
+  int      afl_global_id = 1, debug = 0, autodictionary = 1;
   uint32_t be_quiet = 0, inst_blocks = 0, inst_funcs = 0;
   uint64_t map_addr = 0x10000;
 
@@ -127,10 +127,6 @@ struct InsTrimLTO : public ModulePass {
 
     /* Process environment variables */
 
-    if (getenv("AFL_LLVM_AUTODICTIONARY") ||
-        getenv("AFL_LLVM_LTO_AUTODICTIONARY"))
-      autodictionary = 1;
-
     if (getenv("AFL_LLVM_MAP_DYNAMIC")) map_addr = 0;
 
     if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) {
diff --git a/llvm_mode/afl-llvm-lto-instrumentation.so.cc b/llvm_mode/afl-llvm-lto-instrumentation.so.cc
index af2db3ff..3c1d3565 100644
--- a/llvm_mode/afl-llvm-lto-instrumentation.so.cc
+++ b/llvm_mode/afl-llvm-lto-instrumentation.so.cc
@@ -86,7 +86,7 @@ class AFLLTOPass : public ModulePass {
   bool runOnModule(Module &M) override;
 
  protected:
-  int      afl_global_id = 1, debug = 0, autodictionary = 0;
+  int      afl_global_id = 1, debug = 0, autodictionary = 1;
   uint32_t function_minimum_size = 1;
   uint32_t be_quiet = 0, inst_blocks = 0, inst_funcs = 0, total_instr = 0;
   uint64_t map_addr = 0x10000;
@@ -120,10 +120,6 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
     be_quiet = 1;
 
-  if (getenv("AFL_LLVM_AUTODICTIONARY") ||
-      getenv("AFL_LLVM_LTO_AUTODICTIONARY"))
-    autodictionary = 1;
-
   if (getenv("AFL_LLVM_MAP_DYNAMIC")) map_addr = 0;
 
   if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") ||
diff --git a/llvm_mode/split-compares-pass.so.cc b/llvm_mode/split-compares-pass.so.cc
index 615253ce..0681fbd6 100644
--- a/llvm_mode/split-compares-pass.so.cc
+++ b/llvm_mode/split-compares-pass.so.cc
@@ -93,6 +93,7 @@ char SplitComparesTransform::ID = 0;
 /* This function splits FCMP instructions with xGE or xLE predicates into two
  * FCMP instructions with predicate xGT or xLT and EQ */
 bool SplitComparesTransform::simplifyFPCompares(Module &M) {
+
   LLVMContext &              C = M.getContext();
   std::vector<Instruction *> fcomps;
   IntegerType *              Int1Ty = IntegerType::getInt1Ty(C);
@@ -733,7 +734,7 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
     /* compare the exponents of the operands */
     Instruction *icmp_exponents_equal;
     Instruction *icmp_exponent_result;
-    BasicBlock *signequal2_bb = signequal_bb;
+    BasicBlock * signequal2_bb = signequal_bb;
     switch (FcmpInst->getPredicate()) {
 
       case CmpInst::FCMP_OEQ:
@@ -755,20 +756,24 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
         icmp_exponents_equal =
             CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_EQ, m_e0, m_e1);
         signequal_bb->getInstList().insert(
-            BasicBlock::iterator(signequal_bb->getTerminator()), icmp_exponents_equal);
+            BasicBlock::iterator(signequal_bb->getTerminator()),
+            icmp_exponents_equal);
 
         // shortcut for unequal exponents
-	signequal2_bb = signequal_bb->splitBasicBlock(BasicBlock::iterator(signequal_bb->getTerminator()));
+        signequal2_bb = signequal_bb->splitBasicBlock(
+            BasicBlock::iterator(signequal_bb->getTerminator()));
 
         /* if the exponents are equal goto middle_bb else to signequal2_bb */
-	term = signequal_bb->getTerminator();
-        BranchInst::Create(middle_bb, signequal2_bb, icmp_exponents_equal, signequal_bb);
-	term->eraseFromParent();
+        term = signequal_bb->getTerminator();
+        BranchInst::Create(middle_bb, signequal2_bb, icmp_exponents_equal,
+                           signequal_bb);
+        term->eraseFromParent();
 
         icmp_exponent =
             CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_UGT, m_e0, m_e1);
         signequal2_bb->getInstList().insert(
-            BasicBlock::iterator(signequal2_bb->getTerminator()), icmp_exponent);
+            BasicBlock::iterator(signequal2_bb->getTerminator()),
+            icmp_exponent);
         icmp_exponent_result =
             BinaryOperator::Create(Instruction::Xor, icmp_exponent, t_s0);
         break;
@@ -777,20 +782,24 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
         icmp_exponents_equal =
             CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_EQ, m_e0, m_e1);
         signequal_bb->getInstList().insert(
-            BasicBlock::iterator(signequal_bb->getTerminator()), icmp_exponents_equal);
+            BasicBlock::iterator(signequal_bb->getTerminator()),
+            icmp_exponents_equal);
 
         // shortcut for unequal exponents
-	signequal2_bb = signequal_bb->splitBasicBlock(BasicBlock::iterator(signequal_bb->getTerminator()));
+        signequal2_bb = signequal_bb->splitBasicBlock(
+            BasicBlock::iterator(signequal_bb->getTerminator()));
 
         /* if the exponents are equal goto middle_bb else to signequal2_bb */
-	term = signequal_bb->getTerminator();
-        BranchInst::Create(middle_bb, signequal2_bb, icmp_exponents_equal, signequal_bb);
-	term->eraseFromParent();
+        term = signequal_bb->getTerminator();
+        BranchInst::Create(middle_bb, signequal2_bb, icmp_exponents_equal,
+                           signequal_bb);
+        term->eraseFromParent();
 
         icmp_exponent =
             CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_ULT, m_e0, m_e1);
         signequal2_bb->getInstList().insert(
-            BasicBlock::iterator(signequal2_bb->getTerminator()), icmp_exponent);
+            BasicBlock::iterator(signequal2_bb->getTerminator()),
+            icmp_exponent);
         icmp_exponent_result =
             BinaryOperator::Create(Instruction::Xor, icmp_exponent, t_s0);
         break;
@@ -808,21 +817,26 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
       term = signequal2_bb->getTerminator();
 
       switch (FcmpInst->getPredicate()) {
+
         case CmpInst::FCMP_OEQ:
-        /* if the exponents are satifying the compare do a fraction cmp in middle_bb */
-        BranchInst::Create(middle_bb, end_bb, icmp_exponent_result, signequal2_bb);
+          /* if the exponents are satifying the compare do a fraction cmp in
+           * middle_bb */
+          BranchInst::Create(middle_bb, end_bb, icmp_exponent_result,
+                             signequal2_bb);
           break;
         case CmpInst::FCMP_ONE:
         case CmpInst::FCMP_UNE:
-        /* if the exponents are satifying the compare do a fraction cmp in middle_bb */
-        BranchInst::Create(end_bb, middle_bb, icmp_exponent_result, signequal2_bb);
+          /* if the exponents are satifying the compare do a fraction cmp in
+           * middle_bb */
+          BranchInst::Create(end_bb, middle_bb, icmp_exponent_result,
+                             signequal2_bb);
           break;
         case CmpInst::FCMP_OGT:
         case CmpInst::FCMP_UGT:
         case CmpInst::FCMP_OLT:
         case CmpInst::FCMP_ULT:
-        BranchInst::Create(end_bb, signequal2_bb);
-        break;
+          BranchInst::Create(end_bb, signequal2_bb);
+          break;
         default:
           continue;
 
@@ -890,14 +904,15 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
     Instruction *icmp_fraction_result;
     Instruction *icmp_fraction_result2;
     BasicBlock * middle2_bb = middle_bb;
-    PHINode *PN2 = nullptr;
+    PHINode *    PN2 = nullptr;
     switch (FcmpInst->getPredicate()) {
 
       case CmpInst::FCMP_OEQ:
         icmp_fraction_result =
             CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_EQ, t_f0, t_f1);
         middle2_bb->getInstList().insert(
-            BasicBlock::iterator(middle2_bb->getTerminator()), icmp_fraction_result);
+            BasicBlock::iterator(middle2_bb->getTerminator()),
+            icmp_fraction_result);
 
         break;
       case CmpInst::FCMP_UNE:
@@ -905,36 +920,50 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
         icmp_fraction_result =
             CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_NE, t_f0, t_f1);
         middle2_bb->getInstList().insert(
-            BasicBlock::iterator(middle2_bb->getTerminator()), icmp_fraction_result);
+            BasicBlock::iterator(middle2_bb->getTerminator()),
+            icmp_fraction_result);
 
         break;
       case CmpInst::FCMP_OGT:
       case CmpInst::FCMP_UGT:
       case CmpInst::FCMP_OLT:
-      case CmpInst::FCMP_ULT:
-       {
-	middle2_bb = middle_bb->splitBasicBlock(BasicBlock::iterator(middle_bb->getTerminator()));
+      case CmpInst::FCMP_ULT: {
+
+        middle2_bb = middle_bb->splitBasicBlock(
+            BasicBlock::iterator(middle_bb->getTerminator()));
 
-        BasicBlock * negative_bb =
-            BasicBlock::Create(C, "negative_value", middle2_bb->getParent(), middle2_bb);
-        BasicBlock * positive_bb =
-            BasicBlock::Create(C, "positive_value", negative_bb->getParent(), negative_bb);
+        BasicBlock *negative_bb = BasicBlock::Create(
+            C, "negative_value", middle2_bb->getParent(), middle2_bb);
+        BasicBlock *positive_bb = BasicBlock::Create(
+            C, "positive_value", negative_bb->getParent(), negative_bb);
 
-	if (FcmpInst->getPredicate() == CmpInst::FCMP_OGT
-	    ||
+        if (FcmpInst->getPredicate() == CmpInst::FCMP_OGT ||
             FcmpInst->getPredicate() == CmpInst::FCMP_UGT) {
-            negative_bb->getInstList().push_back(icmp_fraction_result = CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_ULT, t_f0, t_f1));
-            positive_bb->getInstList().push_back(icmp_fraction_result2 = CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_UGT, t_f0, t_f1));
+
+          negative_bb->getInstList().push_back(
+              icmp_fraction_result = CmpInst::Create(
+                  Instruction::ICmp, CmpInst::ICMP_ULT, t_f0, t_f1));
+          positive_bb->getInstList().push_back(
+              icmp_fraction_result2 = CmpInst::Create(
+                  Instruction::ICmp, CmpInst::ICMP_UGT, t_f0, t_f1));
+
         } else {
-            negative_bb->getInstList().push_back(icmp_fraction_result = CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_UGT, t_f0, t_f1));
-            positive_bb->getInstList().push_back(icmp_fraction_result2 = CmpInst::Create(Instruction::ICmp, CmpInst::ICMP_ULT, t_f0, t_f1));
+
+          negative_bb->getInstList().push_back(
+              icmp_fraction_result = CmpInst::Create(
+                  Instruction::ICmp, CmpInst::ICMP_UGT, t_f0, t_f1));
+          positive_bb->getInstList().push_back(
+              icmp_fraction_result2 = CmpInst::Create(
+                  Instruction::ICmp, CmpInst::ICMP_ULT, t_f0, t_f1));
+
         }
+
         BranchInst::Create(middle2_bb, negative_bb);
         BranchInst::Create(middle2_bb, positive_bb);
 
-	term = middle_bb->getTerminator();
+        term = middle_bb->getTerminator();
         BranchInst::Create(negative_bb, positive_bb, t_s0, middle_bb);
-	term->eraseFromParent();
+        term->eraseFromParent();
 
         PN2 = PHINode::Create(Int1Ty, 2, "");
         PN2->addIncoming(icmp_fraction_result, negative_bb);
@@ -942,8 +971,8 @@ size_t SplitComparesTransform::splitFPCompares(Module &M) {
         middle2_bb->getInstList().insert(
             BasicBlock::iterator(middle2_bb->getTerminator()), PN2);
 
-       }
-        break;
+      } break;
+
       default:
         continue;
 
-- 
cgit 1.4.1


From 4d929f80fbf22eeb09612a575bcd1a4141b9a8a9 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Mon, 13 Jul 2020 17:57:02 +0200
Subject: fix for laf intel float split not enabled if not not on a tty

---
 .custom-format.py                    |  3 ++-
 docs/Changelog.md                    |  3 ++-
 examples/afl_untracer/README.md      |  1 +
 examples/afl_untracer/afl-untracer.c | 14 ++++++++------
 llvm_mode/split-compares-pass.so.cc  |  4 ++--
 5 files changed, 15 insertions(+), 10 deletions(-)

(limited to 'docs')

diff --git a/.custom-format.py b/.custom-format.py
index 6f1b0bfa..60f6d9c3 100755
--- a/.custom-format.py
+++ b/.custom-format.py
@@ -32,7 +32,8 @@ if CLANG_FORMAT_BIN is None:
         p = subprocess.Popen(["clang-format-10", "--version"], stdout=subprocess.PIPE)
         o, _ = p.communicate()
         o = str(o, "utf-8")
-        o = o[len("clang-format version "):].strip()
+        o = re.sub(r".*ersion ", "", o)
+        #o = o[len("clang-format version "):].strip()
         o = o[:o.find(".")]
         o = int(o)
     except:
diff --git a/docs/Changelog.md b/docs/Changelog.md
index b0bda6dc..8fb85ce6 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -13,7 +13,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
   - afl-fuzz:
      - eliminated CPU affinity race condition for -S/-M runs
   - llvm_mode:
-     - fix for laf-intel float splitting
+     - fixes for laf-intel float splitting (thanks to mark-griffin for
+       reporting)
      - LTO: autodictionary mode is a default
      - LTO: instrim instrumentation disabled, only classic support used
             as it is always better
diff --git a/examples/afl_untracer/README.md b/examples/afl_untracer/README.md
index e59792cb..9cb13527 100644
--- a/examples/afl_untracer/README.md
+++ b/examples/afl_untracer/README.md
@@ -32,6 +32,7 @@ To easily run the scripts without needing to run the GUI with Ghidra:
 /opt/ghidra/support/analyzeHeadless /tmp/ tmp$$ -import libtestinstr.so -postscript ./ghidra_get_patchpoints.java
 rm -rf /tmp/tmp$$
 ```
+The file is created at `~/Desktop/patches.txt`
 
 ### Fuzzing
 
diff --git a/examples/afl_untracer/afl-untracer.c b/examples/afl_untracer/afl-untracer.c
index dc2cd378..68658bfd 100644
--- a/examples/afl_untracer/afl-untracer.c
+++ b/examples/afl_untracer/afl-untracer.c
@@ -74,6 +74,9 @@
 
 // STEP 1:
 
+/* here you need to specify the parameter for the target function */
+static void *(*o_function)(u8 *buf, int len);
+
 /* use stdin (1) or a file on the commandline (0) */
 static u32 use_stdin = 1;
 
@@ -668,13 +671,10 @@ static void sigtrap_handler(int signum, siginfo_t *si, void *context) {
 
 }
 
-/* here you need to specify the parameter for the target function */
-static void *(*o_function)(u8 *buf, int len);
-
 /* the MAIN function */
 int main(int argc, char *argv[]) {
 
-  (void) personality(ADDR_NO_RANDOMIZE); // disable ASLR
+  (void)personality(ADDR_NO_RANDOMIZE);  // disable ASLR
 
   pid = getpid();
   if (getenv("AFL_DEBUG")) debug = 1;
@@ -745,9 +745,10 @@ int main(int argc, char *argv[]) {
 }
 
 #ifndef _DEBUG
-inline 
+inline
 #endif
-static void fuzz() {
+    static void
+    fuzz() {
 
   // STEP 3: call the function to fuzz, also the functions you might
   //         need to call to prepare the function and - important! -
@@ -762,3 +763,4 @@ static void fuzz() {
   // END STEP 3
 
 }
+
diff --git a/llvm_mode/split-compares-pass.so.cc b/llvm_mode/split-compares-pass.so.cc
index 0681fbd6..55128ca2 100644
--- a/llvm_mode/split-compares-pass.so.cc
+++ b/llvm_mode/split-compares-pass.so.cc
@@ -1263,8 +1263,6 @@ bool SplitComparesTransform::runOnModule(Module &M) {
 
     if (enableFPSplit) {
 
-      simplifyFPCompares(M);
-
       errs() << "Split-floatingpoint-compare-pass: " << splitFPCompares(M)
              << " FP comparisons splitted\n";
 
@@ -1274,6 +1272,8 @@ bool SplitComparesTransform::runOnModule(Module &M) {
 
     be_quiet = 1;
 
+  if (enableFPSplit) simplifyFPCompares(M);
+
   simplifyCompares(M);
 
   simplifyIntSignedness(M);
-- 
cgit 1.4.1


From a8726b8254f2f8c429c8b3e1c2d30b9f7baa6e93 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Wed, 15 Jul 2020 00:08:38 +0200
Subject: ensure afl-frida uses persistent mode

---
 docs/Changelog.md              |  2 ++
 examples/afl_frida/README.md   | 10 +++-------
 examples/afl_frida/afl-frida.c |  8 ++++++++
 3 files changed, 13 insertions(+), 7 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index 8fb85ce6..50f5629f 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -18,6 +18,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - LTO: autodictionary mode is a default
      - LTO: instrim instrumentation disabled, only classic support used
             as it is always better
+  - added afl-frida gum solution to examples/afl_frida (mostly imported
+    from https://github.com/meme/hotwax/)
   - small fixes to afl-plot, afl-whatsup and man page creation
 
 
diff --git a/examples/afl_frida/README.md b/examples/afl_frida/README.md
index 93e8f35a..33bd67c8 100644
--- a/examples/afl_frida/README.md
+++ b/examples/afl_frida/README.md
@@ -24,14 +24,10 @@ afl-fuzz -i in -o out -- ./afl-frida
 ```
 (or even remote via afl-network-proxy).
 
-### Testing and debugging
+# Speed and stability
 
-For testing/debugging you can try:
-```
-make DEBUG=1
-AFL_DEBUG=1 gdb ./afl-frida
-```
-and then you can easily set breakpoints to "breakpoint" and "fuzz".
+The speed is very good, about x12 of fork() qemu_mode.
+However the stability is low. Reason is currently unknown.
 
 # Background
 
diff --git a/examples/afl_frida/afl-frida.c b/examples/afl_frida/afl-frida.c
index c24e05b7..ff10ffb7 100644
--- a/examples/afl_frida/afl-frida.c
+++ b/examples/afl_frida/afl-frida.c
@@ -39,6 +39,7 @@
 
 #ifndef __APPLE__
   #include <sys/wait.h>
+  #include <sys/personality.h>
 #endif
 
 
@@ -216,6 +217,10 @@ static int enumerate_ranges(const GumRangeDetails *details,
 
 int main() {
 
+#ifndef __APPLE__
+  (void)personality(ADDR_NO_RANDOMIZE);  // disable ASLR
+#endif
+
   // STEP 2: load the library you want to fuzz and lookup the functions,
   //         inclusive of the cleanup functions.
   //         If there is just one function, then there is nothing to change
@@ -264,6 +269,9 @@ int main() {
 
   GumEventSink *event_sink = gum_fake_event_sink_new();
 
+  // to ensure that the signatures are not optimized out
+  memcpy(__afl_area_ptr, (void*)AFL_PERSISTENT, sizeof(AFL_PERSISTENT) + 1);
+  memcpy(__afl_area_ptr + 32, (void*)AFL_DEFER_FORKSVR, sizeof(AFL_DEFER_FORKSVR) + 1);
   __afl_manual_init();
 
   //
-- 
cgit 1.4.1


From 67d7c364f6705d41f3e0dcd89fffcae5ddc79326 Mon Sep 17 00:00:00 2001
From: h1994st <h1994st@gmail.com>
Date: Thu, 16 Jul 2020 21:59:50 -0400
Subject: Fix typo

---
 docs/custom_mutators.md      | 2 +-
 examples/afl_frida/README.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'docs')

diff --git a/docs/custom_mutators.md b/docs/custom_mutators.md
index 464acbee..a22c809b 100644
--- a/docs/custom_mutators.md
+++ b/docs/custom_mutators.md
@@ -36,7 +36,7 @@ size_t afl_custom_fuzz(void *data, uint8_t *buf, size_t buf_size, u8 **out_buf,
 size_t afl_custom_post_process(void *data, uint8_t *buf, size_t buf_size, uint8_t **out_buf);
 int32_t afl_custom_init_trim(void *data, uint8_t *buf, size_t buf_size);
 size_t afl_custom_trim(void *data, uint8_t **out_buf);
-int32_t afl_custom_post_trim(void *data, int success) {
+int32_t afl_custom_post_trim(void *data, int success);
 size_t afl_custom_havoc_mutation(void *data, u8 *buf, size_t buf_size, u8 **out_buf, size_t max_size);
 uint8_t afl_custom_havoc_mutation_probability(void *data);
 uint8_t afl_custom_queue_get(void *data, const uint8_t *filename);
diff --git a/examples/afl_frida/README.md b/examples/afl_frida/README.md
index 1ee19a68..7743479b 100644
--- a/examples/afl_frida/README.md
+++ b/examples/afl_frida/README.md
@@ -31,4 +31,4 @@ However the stability is low. Reason is currently unknown.
 
 # Background
 
-This code ist copied for a larger part from https://github.com/meme/hotwax 
+This code is copied for a larger part from https://github.com/meme/hotwax
-- 
cgit 1.4.1


From 72b46a07d6a64a7871f029330bcf5eae649c8eb1 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Thu, 23 Jul 2020 15:58:13 +0200
Subject: added honggfuzz custom mutator :)

---
 TODO.md                                            |    1 +
 custom_mutators/honggfuzz/Makefile                 |   15 +
 custom_mutators/honggfuzz/README.md                |   12 +
 custom_mutators/honggfuzz/common.h                 |    0
 custom_mutators/honggfuzz/custom_mutator_helpers.h |   22 +
 custom_mutators/honggfuzz/honggfuzz.c              |  141 +++
 custom_mutators/honggfuzz/honggfuzz.h              |  460 +++++++++
 custom_mutators/honggfuzz/input.h                  |  106 ++
 custom_mutators/honggfuzz/libhfcommon              |    1 +
 custom_mutators/honggfuzz/log.h                    |    1 +
 custom_mutators/honggfuzz/mangle.c                 | 1039 ++++++++++++++++++++
 custom_mutators/honggfuzz/mangle.h                 |   32 +
 custom_mutators/honggfuzz/util.h                   |    1 +
 docs/Changelog.md                                  |    1 +
 14 files changed, 1832 insertions(+)
 create mode 100644 custom_mutators/honggfuzz/Makefile
 create mode 100644 custom_mutators/honggfuzz/README.md
 create mode 100644 custom_mutators/honggfuzz/common.h
 create mode 100644 custom_mutators/honggfuzz/custom_mutator_helpers.h
 create mode 100644 custom_mutators/honggfuzz/honggfuzz.c
 create mode 100644 custom_mutators/honggfuzz/honggfuzz.h
 create mode 100644 custom_mutators/honggfuzz/input.h
 create mode 120000 custom_mutators/honggfuzz/libhfcommon
 create mode 120000 custom_mutators/honggfuzz/log.h
 create mode 100644 custom_mutators/honggfuzz/mangle.c
 create mode 100644 custom_mutators/honggfuzz/mangle.h
 create mode 120000 custom_mutators/honggfuzz/util.h

(limited to 'docs')

diff --git a/TODO.md b/TODO.md
index 341f2c78..ad3ef83e 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,6 +2,7 @@
 
 ## Roadmap 2.67+
 
+ - -i - + foreign fuzzer sync support: scandir with time sort
  - pre_save custom module example to save away test cases
  - expand on AFL_LLVM_INSTRUMENT_FILE to also support sancov allowlist format
  - allow to sync against honggfuzz and libfuzzer
diff --git a/custom_mutators/honggfuzz/Makefile b/custom_mutators/honggfuzz/Makefile
new file mode 100644
index 00000000..2f46d0e7
--- /dev/null
+++ b/custom_mutators/honggfuzz/Makefile
@@ -0,0 +1,15 @@
+
+CFLAGS = -O3 -funroll-loops -fPIC -Wl,-Bsymbolic
+
+all: honggfuzz.so
+
+honggfuzz.so:	honggfuzz.c input.h mangle.c ../../src/afl-performance.c
+	$(CC) $(CFLAGS) -I../../include -I. -shared -o honggfuzz.so honggfuzz.c mangle.c ../../src/afl-performance.c
+
+update:
+	wget --unlink https://github.com/google/honggfuzz/raw/master/mangle.c
+	wget --unlink https://github.com/google/honggfuzz/raw/master/mangle.h
+	wget --unlink https://github.com/google/honggfuzz/raw/master/honggfuzz.h
+
+clean:
+	rm -f *.o *~ *.so core
diff --git a/custom_mutators/honggfuzz/README.md b/custom_mutators/honggfuzz/README.md
new file mode 100644
index 00000000..8824976f
--- /dev/null
+++ b/custom_mutators/honggfuzz/README.md
@@ -0,0 +1,12 @@
+# custum mutator: honggfuzz mangle
+
+this is the very good honggfuzz mutator in mangle.c as a custom mutator
+module for afl++. It is the original mangle.c, mangle.h and honggfuzz.h
+with a lot of mocking around it :-)
+
+just type `make` to build
+
+```AFL_CUSTOM_MUTATOR_LIBRARY=custom_mutators/honggfuzz/honggfuzz.so afl-fuzz ...```
+
+> Original repository: https://github.com/google/honggfuzz
+> Source commit: d0fbcb0373c32436b8fb922e6937da93b17291f5
diff --git a/custom_mutators/honggfuzz/common.h b/custom_mutators/honggfuzz/common.h
new file mode 100644
index 00000000..e69de29b
diff --git a/custom_mutators/honggfuzz/custom_mutator_helpers.h b/custom_mutators/honggfuzz/custom_mutator_helpers.h
new file mode 100644
index 00000000..57754697
--- /dev/null
+++ b/custom_mutators/honggfuzz/custom_mutator_helpers.h
@@ -0,0 +1,22 @@
+#ifndef CUSTOM_MUTATOR_HELPERS
+#define CUSTOM_MUTATOR_HELPERS
+
+#include "config.h"
+#include "types.h"
+#include "afl-fuzz.h"
+#include <stdlib.h>
+
+#define INITIAL_GROWTH_SIZE (64)
+
+/* Use in a struct: creates a name_buf and a name_size variable. */
+#define BUF_VAR(type, name) \
+  type * name##_buf;        \
+  size_t name##_size;
+/* this filles in `&structptr->something_buf, &structptr->something_size`. */
+#define BUF_PARAMS(struct, name) \
+  (void **)&struct->name##_buf, &struct->name##_size
+
+#undef INITIAL_GROWTH_SIZE
+
+#endif
+
diff --git a/custom_mutators/honggfuzz/honggfuzz.c b/custom_mutators/honggfuzz/honggfuzz.c
new file mode 100644
index 00000000..368741c1
--- /dev/null
+++ b/custom_mutators/honggfuzz/honggfuzz.c
@@ -0,0 +1,141 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "custom_mutator_helpers.h"
+#include "mangle.h"
+
+#define NUMBER_OF_MUTATIONS 5
+
+uint8_t *         queue_input;
+size_t            queue_input_size;
+afl_state_t *     afl_struct;
+run_t             run;
+honggfuzz_t       global;
+struct _dynfile_t dynfile;
+
+typedef struct my_mutator {
+
+  afl_state_t *afl;
+  run_t *      run;
+  u8 *         mutator_buf;
+  unsigned int seed;
+  unsigned int extras_cnt, a_extras_cnt;
+
+} my_mutator_t;
+
+my_mutator_t *afl_custom_init(afl_state_t *afl, unsigned int seed) {
+
+  my_mutator_t *data = calloc(1, sizeof(my_mutator_t));
+  if (!data) {
+
+    perror("afl_custom_init alloc");
+    return NULL;
+
+  }
+
+  if ((data->mutator_buf = malloc(MAX_FILE)) == NULL) {
+
+    perror("mutator_buf alloc");
+    return NULL;
+
+  }
+
+  run.dynfile = &dynfile;
+  run.global = &global;
+  data->afl = afl;
+  data->seed = seed;
+  data->run = &run;
+  afl_struct = afl;
+
+  run.global->mutate.maxInputSz = MAX_FILE;
+  run.global->mutate.mutationsPerRun = NUMBER_OF_MUTATIONS;
+  run.mutationsPerRun = NUMBER_OF_MUTATIONS;
+  run.global->timing.lastCovUpdate = 6;
+
+  // global->feedback.cmpFeedback
+  // global->feedback.cmpFeedbackMap
+
+  return data;
+
+}
+
+/* When a new queue entry is added we check if there are new dictionary
+   entries to add to honggfuzz structure */
+
+void afl_custom_queue_new_entry(my_mutator_t * data,
+                                const uint8_t *filename_new_queue,
+                                const uint8_t *filename_orig_queue) {
+
+  while (data->extras_cnt < data->afl->extras_cnt &&
+         run.global->mutate.dictionaryCnt < 1024) {
+
+    memcpy(run.global->mutate.dictionary[run.global->mutate.dictionaryCnt].val,
+           data->afl->extras[data->extras_cnt].data,
+           data->afl->extras[data->extras_cnt].len);
+    run.global->mutate.dictionary[run.global->mutate.dictionaryCnt].len =
+        data->afl->extras[data->extras_cnt].len;
+    run.global->mutate.dictionaryCnt++;
+    data->extras_cnt++;
+
+  }
+
+  while (data->extras_cnt < data->afl->a_extras_cnt &&
+         run.global->mutate.dictionaryCnt < 1024) {
+
+    memcpy(run.global->mutate.dictionary[run.global->mutate.dictionaryCnt].val,
+           data->afl->a_extras[data->a_extras_cnt].data,
+           data->afl->a_extras[data->a_extras_cnt].len);
+    run.global->mutate.dictionary[run.global->mutate.dictionaryCnt].len =
+        data->afl->a_extras[data->a_extras_cnt].len;
+    run.global->mutate.dictionaryCnt++;
+    data->a_extras_cnt++;
+
+  }
+
+}
+
+/* we could set only_printable if is_ascii is set ... let's see
+uint8_t afl_custom_queue_get(void *data, const uint8_t *filename) {
+
+  //run.global->cfg.only_printable = ...
+
+}
+
+*/
+
+/* here we run the honggfuzz mutator, which is really good */
+
+size_t afl_custom_fuzz(my_mutator_t *data, uint8_t *buf, size_t buf_size,
+                       u8 **out_buf, uint8_t *add_buf, size_t add_buf_size,
+                       size_t max_size) {
+
+  /* set everything up, costly ... :( */
+  memcpy(data->mutator_buf, buf, buf_size);
+  queue_input = data->mutator_buf;
+  run.dynfile->data = data->mutator_buf;
+  queue_input_size = buf_size;
+  run.dynfile->size = buf_size;
+  *out_buf = data->mutator_buf;
+
+  /* the mutation */
+  mangle_mangleContent(&run, NUMBER_OF_MUTATIONS);
+
+  /* return size of mutated data */
+  return run.dynfile->size;
+
+}
+
+/**
+ * Deinitialize everything
+ *
+ * @param data The data ptr from afl_custom_init
+ */
+void afl_custom_deinit(my_mutator_t *data) {
+
+  free(data->mutator_buf);
+  free(data);
+
+}
+
diff --git a/custom_mutators/honggfuzz/honggfuzz.h b/custom_mutators/honggfuzz/honggfuzz.h
new file mode 100644
index 00000000..4e045272
--- /dev/null
+++ b/custom_mutators/honggfuzz/honggfuzz.h
@@ -0,0 +1,460 @@
+/*
+ *
+ * honggfuzz - core structures and macros
+ * -----------------------------------------
+ *
+ * Author: Robert Swiecki <swiecki@google.com>
+ *
+ * Copyright 2010-2018 by Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ *
+ */
+
+#ifndef _HF_HONGGFUZZ_H_
+#define _HF_HONGGFUZZ_H_
+
+#include <dirent.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <time.h>
+
+#include "libhfcommon/util.h"
+
+#define PROG_NAME "honggfuzz"
+#define PROG_VERSION "2.2"
+
+/* Name of the template which will be replaced with the proper name of the file
+ */
+#define _HF_FILE_PLACEHOLDER "___FILE___"
+
+/* Default name of the report created with some architectures */
+#define _HF_REPORT_FILE "HONGGFUZZ.REPORT.TXT"
+
+/* Default stack-size of created threads. */
+#define _HF_PTHREAD_STACKSIZE (1024ULL * 1024ULL * 2ULL)             /* 2MB */
+
+/* Name of envvar which indicates sequential number of fuzzer */
+#define _HF_THREAD_NO_ENV "HFUZZ_THREAD_NO"
+
+/* Name of envvar which indicates that the netDriver should be used */
+#define _HF_THREAD_NETDRIVER_ENV "HFUZZ_USE_NETDRIVER"
+
+/* Name of envvar which indicates honggfuzz's log level in use */
+#define _HF_LOG_LEVEL_ENV "HFUZZ_LOG_LEVEL"
+
+/* Number of crash verifier iterations before tag crash as stable */
+#define _HF_VERIFIER_ITER 5
+
+/* Size (in bytes) for report data to be stored in stack before written to file
+ */
+#define _HF_REPORT_SIZE 32768
+
+/* Perf bitmap size */
+#define _HF_PERF_BITMAP_SIZE_16M (1024U * 1024U * 16U)
+#define _HF_PERF_BITMAP_BITSZ_MASK 0x7FFFFFFULL
+/* Maximum number of PC guards (=trace-pc-guard) we support */
+#define _HF_PC_GUARD_MAX (1024ULL * 1024ULL * 64ULL)
+
+/* Maximum size of the input file in bytes (1 MiB) */
+#define _HF_INPUT_MAX_SIZE (1024ULL * 1024ULL)
+
+/* Default maximum size of produced inputs */
+#define _HF_INPUT_DEFAULT_SIZE (1024ULL * 8)
+
+/* Per-thread bitmap */
+#define _HF_PERTHREAD_BITMAP_FD 1018
+/* FD used to report back used int/str constants from the fuzzed process */
+#define _HF_CMP_BITMAP_FD 1019
+/* FD used to log inside the child process */
+#define _HF_LOG_FD 1020
+/* FD used to represent the input file */
+#define _HF_INPUT_FD 1021
+/* FD used to pass coverage feedback from the fuzzed process */
+#define _HF_COV_BITMAP_FD 1022
+#define _HF_BITMAP_FD _HF_COV_BITMAP_FD   /* Old name for _HF_COV_BITMAP_FD */
+/* FD used to pass data to a persistent process */
+#define _HF_PERSISTENT_FD 1023
+
+/* Input file as a string */
+#define _HF_INPUT_FILE_PATH "/dev/fd/" HF_XSTR(_HF_INPUT_FD)
+
+/* Maximum number of supported execve() args */
+#define _HF_ARGS_MAX 2048
+
+/* Message indicating that the fuzzed process is ready for new data */
+static const uint8_t HFReadyTag = 'R';
+
+/* Maximum number of active fuzzing threads */
+#define _HF_THREAD_MAX 1024U
+
+/* Persistent-binary signature - if found within file, it means it's a
+ * persistent mode binary */
+#define _HF_PERSISTENT_SIG "\x01_LIBHFUZZ_PERSISTENT_BINARY_SIGNATURE_\x02\xFF"
+/* HF NetDriver signature - if found within file, it means it's a
+ * NetDriver-based binary */
+#define _HF_NETDRIVER_SIG "\x01_LIBHFUZZ_NETDRIVER_BINARY_SIGNATURE_\x02\xFF"
+
+/* printf() nonmonetary separator. According to MacOSX's man it's supported
+ * there as well */
+#define _HF_NONMON_SEP "'"
+
+typedef enum {
+
+  _HF_DYNFILE_NONE = 0x0,
+  _HF_DYNFILE_INSTR_COUNT = 0x1,
+  _HF_DYNFILE_BRANCH_COUNT = 0x2,
+  _HF_DYNFILE_BTS_EDGE = 0x10,
+  _HF_DYNFILE_IPT_BLOCK = 0x20,
+  _HF_DYNFILE_SOFT = 0x40,
+
+} dynFileMethod_t;
+
+typedef struct {
+
+  uint64_t cpuInstrCnt;
+  uint64_t cpuBranchCnt;
+  uint64_t bbCnt;
+  uint64_t newBBCnt;
+  uint64_t softCntPc;
+  uint64_t softCntEdge;
+  uint64_t softCntCmp;
+
+} hwcnt_t;
+
+typedef enum {
+
+  _HF_STATE_UNSET = 0,
+  _HF_STATE_STATIC,
+  _HF_STATE_DYNAMIC_DRY_RUN,
+  _HF_STATE_DYNAMIC_MAIN,
+  _HF_STATE_DYNAMIC_MINIMIZE,
+
+} fuzzState_t;
+
+typedef enum {
+
+  HF_MAYBE = -1,
+  HF_NO = 0,
+  HF_YES = 1,
+
+} tristate_t;
+
+struct _dynfile_t {
+
+  size_t             size;
+  uint64_t           cov[4];
+  size_t             idx;
+  int                fd;
+  uint64_t           timeExecUSecs;
+  char               path[PATH_MAX];
+  struct _dynfile_t *src;
+  uint32_t           refs;
+  uint8_t *          data;
+  TAILQ_ENTRY(_dynfile_t) pointers;
+
+};
+
+typedef struct _dynfile_t dynfile_t;
+
+struct strings_t {
+
+  size_t len;
+  TAILQ_ENTRY(strings_t) pointers;
+  char s[];
+
+};
+
+typedef struct {
+
+  uint8_t  pcGuardMap[_HF_PC_GUARD_MAX];
+  uint8_t  bbMapPc[_HF_PERF_BITMAP_SIZE_16M];
+  uint32_t bbMapCmp[_HF_PERF_BITMAP_SIZE_16M];
+  uint64_t pidNewPC[_HF_THREAD_MAX];
+  uint64_t pidNewEdge[_HF_THREAD_MAX];
+  uint64_t pidNewCmp[_HF_THREAD_MAX];
+  uint64_t guardNb;
+  uint64_t pidTotalPC[_HF_THREAD_MAX];
+  uint64_t pidTotalEdge[_HF_THREAD_MAX];
+  uint64_t pidTotalCmp[_HF_THREAD_MAX];
+
+} feedback_t;
+
+typedef struct {
+
+  uint32_t cnt;
+  struct {
+
+    uint8_t  val[32];
+    uint32_t len;
+
+  } valArr[1024 * 16];
+
+} cmpfeedback_t;
+
+typedef struct {
+
+  struct {
+
+    size_t    threadsMax;
+    size_t    threadsFinished;
+    uint32_t  threadsActiveCnt;
+    pthread_t mainThread;
+    pid_t     mainPid;
+    pthread_t threads[_HF_THREAD_MAX];
+
+  } threads;
+
+  struct {
+
+    const char *inputDir;
+    const char *outputDir;
+    DIR *       inputDirPtr;
+    size_t      fileCnt;
+    size_t      testedFileCnt;
+    const char *fileExtn;
+    size_t      maxFileSz;
+    size_t      newUnitsAdded;
+    char        workDir[PATH_MAX];
+    const char *crashDir;
+    const char *covDirNew;
+    bool        saveUnique;
+    size_t      dynfileqMaxSz;
+    size_t      dynfileqCnt;
+    dynfile_t * dynfileqCurrent;
+    dynfile_t * dynfileq2Current;
+    TAILQ_HEAD(dyns_t, _dynfile_t) dynfileq;
+    bool exportFeedback;
+
+  } io;
+
+  struct {
+
+    int                argc;
+    const char *const *cmdline;
+    bool               nullifyStdio;
+    bool               fuzzStdin;
+    const char *       externalCommand;
+    const char *       postExternalCommand;
+    const char *       feedbackMutateCommand;
+    bool               netDriver;
+    bool               persistent;
+    uint64_t           asLimit;
+    uint64_t           rssLimit;
+    uint64_t           dataLimit;
+    uint64_t           coreLimit;
+    uint64_t           stackLimit;
+    bool               clearEnv;
+    char *             env_ptrs[128];
+    char               env_vals[128][4096];
+    sigset_t           waitSigSet;
+
+  } exe;
+
+  struct {
+
+    time_t  timeStart;
+    time_t  runEndTime;
+    time_t  tmOut;
+    time_t  lastCovUpdate;
+    int64_t timeOfLongestUnitUSecs;
+    bool    tmoutVTALRM;
+
+  } timing;
+
+  struct {
+
+    struct {
+
+      uint8_t val[256];
+      size_t  len;
+
+    } dictionary[1024];
+
+    size_t      dictionaryCnt;
+    const char *dictionaryFile;
+    size_t      mutationsMax;
+    unsigned    mutationsPerRun;
+    size_t      maxInputSz;
+
+  } mutate;
+
+  struct {
+
+    bool    useScreen;
+    char    cmdline_txt[65];
+    int64_t lastDisplayUSecs;
+
+  } display;
+
+  struct {
+
+    bool        useVerifier;
+    bool        exitUponCrash;
+    const char *reportFile;
+    size_t      dynFileIterExpire;
+    bool        only_printable;
+    bool        minimize;
+    bool        switchingToFDM;
+
+  } cfg;
+
+  struct {
+
+    bool enable;
+    bool del_report;
+
+  } sanitizer;
+
+  struct {
+
+    fuzzState_t     state;
+    feedback_t *    covFeedbackMap;
+    int             covFeedbackFd;
+    cmpfeedback_t * cmpFeedbackMap;
+    int             cmpFeedbackFd;
+    bool            cmpFeedback;
+    const char *    blacklistFile;
+    uint64_t *      blacklist;
+    size_t          blacklistCnt;
+    bool            skipFeedbackOnTimeout;
+    uint64_t        maxCov[4];
+    dynFileMethod_t dynFileMethod;
+    hwcnt_t         hwCnts;
+
+  } feedback;
+
+  struct {
+
+    size_t mutationsCnt;
+    size_t crashesCnt;
+    size_t uniqueCrashesCnt;
+    size_t verifiedCrashesCnt;
+    size_t blCrashesCnt;
+    size_t timeoutedCnt;
+
+  } cnts;
+
+  struct {
+
+    bool enabled;
+    int  serverSocket;
+    int  clientSocket;
+
+  } socketFuzzer;
+
+  struct {
+
+    pthread_rwlock_t dynfileq;
+    pthread_mutex_t  feedback;
+    pthread_mutex_t  report;
+    pthread_mutex_t  state;
+    pthread_mutex_t  input;
+    pthread_mutex_t  timing;
+
+  } mutex;
+
+  /* For the Linux code */
+  struct {
+
+    int         exeFd;
+    uint64_t    dynamicCutOffAddr;
+    bool        disableRandomization;
+    void *      ignoreAddr;
+    const char *symsBlFile;
+    char **     symsBl;
+    size_t      symsBlCnt;
+    const char *symsWlFile;
+    char **     symsWl;
+    size_t      symsWlCnt;
+    uintptr_t   cloneFlags;
+    tristate_t  useNetNs;
+    bool        kernelOnly;
+    bool        useClone;
+
+  } arch_linux;
+
+  /* For the NetBSD code */
+  struct {
+
+    void *      ignoreAddr;
+    const char *symsBlFile;
+    char **     symsBl;
+    size_t      symsBlCnt;
+    const char *symsWlFile;
+    char **     symsWl;
+    size_t      symsWlCnt;
+
+  } arch_netbsd;
+
+} honggfuzz_t;
+
+typedef enum {
+
+  _HF_RS_UNKNOWN = 0,
+  _HF_RS_WAITING_FOR_INITIAL_READY = 1,
+  _HF_RS_WAITING_FOR_READY = 2,
+  _HF_RS_SEND_DATA = 3,
+
+} runState_t;
+
+typedef struct {
+
+  honggfuzz_t *global;
+  pid_t        pid;
+  int64_t      timeStartedUSecs;
+  char         crashFileName[PATH_MAX];
+  uint64_t     pc;
+  uint64_t     backtrace;
+  uint64_t     access;
+  int          exception;
+  char         report[_HF_REPORT_SIZE];
+  bool         mainWorker;
+  unsigned     mutationsPerRun;
+  dynfile_t *  dynfile;
+  bool         staticFileTryMore;
+  uint32_t     fuzzNo;
+  int          persistentSock;
+  runState_t   runState;
+  bool         tmOutSignaled;
+  char *       args[_HF_ARGS_MAX + 1];
+  int          perThreadCovFeedbackFd;
+  unsigned     triesLeft;
+  dynfile_t *  current;
+#if !defined(_HF_ARCH_DARWIN)
+  timer_t timerId;
+#endif  // !defined(_HF_ARCH_DARWIN)
+  hwcnt_t hwCnts;
+
+  struct {
+
+    /* For Linux code */
+    uint8_t *perfMmapBuf;
+    uint8_t *perfMmapAux;
+    int      cpuInstrFd;
+    int      cpuBranchFd;
+    int      cpuIptBtsFd;
+
+  } arch_linux;
+
+} run_t;
+
+#endif
+
diff --git a/custom_mutators/honggfuzz/input.h b/custom_mutators/honggfuzz/input.h
new file mode 100644
index 00000000..c67d88a6
--- /dev/null
+++ b/custom_mutators/honggfuzz/input.h
@@ -0,0 +1,106 @@
+#ifndef _HG_INPUT_
+#define _HG_INPUT_
+
+#include <stdarg.h>
+#ifdef __clang__
+#include <stdatomic.h>
+#endif
+#include <stdbool.h>
+#include <stdint.h>
+#include <time.h>
+
+#include "honggfuzz.h"
+#include "afl-fuzz.h"
+
+/*
+ * Go-style defer scoped implementation
+ *
+ * If compiled with clang, use: -fblocks -lBlocksRuntime
+ *
+ * Example of use:
+ *
+ * {
+ *   int fd = open(fname, O_RDONLY);
+ *   if (fd == -1) {
+ *     error(....);
+ *     return;
+ *   }
+ *   defer { close(fd); };
+ *   ssize_t sz = read(fd, buf, sizeof(buf));
+ *   ...
+ *   ...
+ * }
+ *
+ */
+
+#define __STRMERGE(a, b) a##b
+#define _STRMERGE(a, b)  __STRMERGE(a, b)
+#ifdef __clang__
+#if __has_extension(blocks)
+static void __attribute__((unused)) __clang_cleanup_func(void (^*dfunc)(void)) {
+    (*dfunc)();
+}
+
+#define defer                                                                                      \
+    void (^_STRMERGE(__defer_f_, __COUNTER__))(void)                                               \
+        __attribute__((cleanup(__clang_cleanup_func))) __attribute__((unused)) = ^
+
+#else /* __has_extension(blocks) */
+#define defer UNIMPLEMENTED - NO - SUPPORT - FOR - BLOCKS - IN - YOUR - CLANG - ENABLED
+#endif /*  __has_extension(blocks) */
+#else  /* !__clang__, e.g.: gcc */
+
+#define __block
+#define _DEFER(a, count)                                                                            \
+    auto void _STRMERGE(__defer_f_, count)(void* _defer_arg __attribute__((unused)));               \
+    int       _STRMERGE(__defer_var_, count) __attribute__((cleanup(_STRMERGE(__defer_f_, count)))) \
+        __attribute__((unused));                                                                    \
+    void _STRMERGE(__defer_f_, count)(void* _defer_arg __attribute__((unused)))
+#define defer _DEFER(a, __COUNTER__)
+#endif /* ifdef __clang__ */
+
+#define HF_MIN(x, y) (x <= y ? x : y)
+#define HF_MAX(x, y) (x >= y ? x : y)
+#define ATOMIC_GET
+#define ARRAYSIZE(x) (sizeof(x) / sizeof(*x))
+#define HF_ATTR_UNUSED __attribute__((unused))
+#define util_Malloc(x) malloc(x)
+
+extern uint8_t *         queue_input;
+extern size_t            queue_input_size;
+extern afl_state_t *     afl_struct;
+
+inline void wmb() { }
+inline void LOG_F(const char *format, ...) { }
+static inline uint64_t util_rndGet(uint64_t min, uint64_t max) {
+  return min + rand_below(afl_struct, max - min + 1);
+}
+static inline uint64_t util_rnd64() { return rand_below(afl_struct, 1 << 30); }
+
+static inline size_t input_getRandomInputAsBuf(run_t *run, const uint8_t **buf) {
+  *buf = queue_input;
+  run->dynfile->data = queue_input;
+  run->dynfile->size = queue_input_size;
+  return queue_input_size;
+}
+static inline void input_setSize(run_t* run, size_t sz) {
+  run->dynfile->size = sz;
+}
+static inline uint8_t util_turnToPrintable(uint8_t* buf, size_t sz) {
+  for (size_t i = 0; i < sz; i++)
+    buf[i] = buf[i] % 95 + 32;
+}
+static inline void util_rndBuf(uint8_t* buf, size_t sz) {
+  if (sz == 0) return;
+  for (size_t i = 0; i < sz; i++)
+    buf[i] = (uint8_t)rand_below(afl_struct, 256);
+}
+static inline uint8_t util_rndPrintable() {
+  return 32 + rand_below(afl_struct, 127 - 32);
+}
+static inline void util_rndBufPrintable(uint8_t* buf, size_t sz) {
+  for (size_t i = 0; i < sz; i++)
+    buf[i] = util_rndPrintable();
+}
+
+#endif
diff --git a/custom_mutators/honggfuzz/libhfcommon b/custom_mutators/honggfuzz/libhfcommon
new file mode 120000
index 00000000..945c9b46
--- /dev/null
+++ b/custom_mutators/honggfuzz/libhfcommon
@@ -0,0 +1 @@
+.
\ No newline at end of file
diff --git a/custom_mutators/honggfuzz/log.h b/custom_mutators/honggfuzz/log.h
new file mode 120000
index 00000000..51e19654
--- /dev/null
+++ b/custom_mutators/honggfuzz/log.h
@@ -0,0 +1 @@
+common.h
\ No newline at end of file
diff --git a/custom_mutators/honggfuzz/mangle.c b/custom_mutators/honggfuzz/mangle.c
new file mode 100644
index 00000000..05e0dcfa
--- /dev/null
+++ b/custom_mutators/honggfuzz/mangle.c
@@ -0,0 +1,1039 @@
+/*
+ *
+ * honggfuzz - run->dynfile->datafer mangling routines
+ * -----------------------------------------
+ *
+ * Author:
+ * Robert Swiecki <swiecki@google.com>
+ *
+ * Copyright 2010-2018 by Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ *
+ */
+
+#include "mangle.h"
+
+#include <ctype.h>
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <time.h>
+
+#include "input.h"
+#include "libhfcommon/common.h"
+#include "libhfcommon/log.h"
+#include "libhfcommon/util.h"
+
+static inline size_t mangle_LenLeft(run_t *run, size_t off) {
+
+  if (off >= run->dynfile->size) {
+
+    LOG_F("Offset is too large: off:%zu >= len:%zu", off, run->dynfile->size);
+
+  }
+
+  return (run->dynfile->size - off - 1);
+
+}
+
+/* Get a random value between <1:max> with x^2 distribution */
+static inline size_t mangle_getLen(size_t max) {
+
+  if (max > _HF_INPUT_MAX_SIZE) {
+
+    LOG_F("max (%zu) > _HF_INPUT_MAX_SIZE (%zu)", max,
+          (size_t)_HF_INPUT_MAX_SIZE);
+
+  }
+
+  if (max == 0) { LOG_F("max == 0"); }
+  if (max == 1) { return 1; }
+
+  const uint64_t max2 = (uint64_t)max * max;
+  const uint64_t max3 = (uint64_t)max * max * max;
+  const uint64_t rnd = util_rndGet(1, max2 - 1);
+
+  uint64_t ret = rnd * rnd;
+  ret /= max3;
+  ret += 1;
+
+  if (ret < 1) {
+
+    LOG_F("ret (%" PRIu64 ") < 1, max:%zu, rnd:%" PRIu64, ret, max, rnd);
+
+  }
+
+  if (ret > max) {
+
+    LOG_F("ret (%" PRIu64 ") > max (%zu), rnd:%" PRIu64, ret, max, rnd);
+
+  }
+
+  return (size_t)ret;
+
+}
+
+/* Prefer smaller values here, so use mangle_getLen() */
+static inline size_t mangle_getOffSet(run_t *run) {
+
+  return mangle_getLen(run->dynfile->size) - 1;
+
+}
+
+/* Offset which can be equal to the file size */
+static inline size_t mangle_getOffSetPlus1(run_t *run) {
+
+  size_t reqlen = HF_MIN(run->dynfile->size + 1, _HF_INPUT_MAX_SIZE);
+  return mangle_getLen(reqlen) - 1;
+
+}
+
+static inline void mangle_Move(run_t *run, size_t off_from, size_t off_to,
+                               size_t len) {
+
+  if (off_from >= run->dynfile->size) { return; }
+  if (off_to >= run->dynfile->size) { return; }
+  if (off_from == off_to) { return; }
+
+  size_t len_from = run->dynfile->size - off_from;
+  len = HF_MIN(len, len_from);
+
+  size_t len_to = run->dynfile->size - off_to;
+  len = HF_MIN(len, len_to);
+
+  memmove(&run->dynfile->data[off_to], &run->dynfile->data[off_from], len);
+
+}
+
+static inline void mangle_Overwrite(run_t *run, size_t off, const uint8_t *src,
+                                    size_t len, bool printable) {
+
+  if (len == 0) { return; }
+  size_t maxToCopy = run->dynfile->size - off;
+  if (len > maxToCopy) { len = maxToCopy; }
+
+  memmove(&run->dynfile->data[off], src, len);
+  if (printable) { util_turnToPrintable(&run->dynfile->data[off], len); }
+
+}
+
+static inline size_t mangle_Inflate(run_t *run, size_t off, size_t len,
+                                    bool printable) {
+
+  if (run->dynfile->size >= run->global->mutate.maxInputSz) { return 0; }
+  if (len > (run->global->mutate.maxInputSz - run->dynfile->size)) {
+
+    len = run->global->mutate.maxInputSz - run->dynfile->size;
+
+  }
+
+  input_setSize(run, run->dynfile->size + len);
+  mangle_Move(run, off, off + len, run->dynfile->size);
+  if (printable) { memset(&run->dynfile->data[off], ' ', len); }
+
+  return len;
+
+}
+
+static inline void mangle_Insert(run_t *run, size_t off, const uint8_t *val,
+                                 size_t len, bool printable) {
+
+  len = mangle_Inflate(run, off, len, printable);
+  mangle_Overwrite(run, off, val, len, printable);
+
+}
+
+static inline void mangle_UseValue(run_t *run, const uint8_t *val, size_t len,
+                                   bool printable) {
+
+  if (util_rnd64() % 2) {
+
+    mangle_Insert(run, mangle_getOffSetPlus1(run), val, len, printable);
+
+  } else {
+
+    mangle_Overwrite(run, mangle_getOffSet(run), val, len, printable);
+
+  }
+
+}
+
+static void mangle_MemSwap(run_t *run, bool printable HF_ATTR_UNUSED) {
+
+  size_t off1 = mangle_getOffSet(run);
+  size_t maxlen1 = run->dynfile->size - off1;
+
+  size_t off2 = mangle_getOffSet(run);
+  size_t maxlen2 = run->dynfile->size - off2;
+
+  size_t   len = mangle_getLen(HF_MIN(maxlen1, maxlen2));
+  uint8_t *tmpbuf = (uint8_t *)util_Malloc(len);
+  defer {
+
+    free(tmpbuf);
+
+  };
+
+  memcpy(tmpbuf, &run->dynfile->data[off1], len);
+  memmove(&run->dynfile->data[off1], &run->dynfile->data[off2], len);
+  memcpy(&run->dynfile->data[off2], tmpbuf, len);
+
+}
+
+static void mangle_MemCopy(run_t *run, bool printable HF_ATTR_UNUSED) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t len = mangle_getLen(run->dynfile->size - off);
+
+  /* Use a temp buf, as Insert/Inflate can change source bytes */
+  uint8_t *tmpbuf = (uint8_t *)util_Malloc(len);
+  defer {
+
+    free(tmpbuf);
+
+  };
+
+  memcpy(tmpbuf, &run->dynfile->data[off], len);
+
+  mangle_UseValue(run, tmpbuf, len, printable);
+
+}
+
+static void mangle_Bytes(run_t *run, bool printable) {
+
+  uint16_t buf;
+  if (printable) {
+
+    util_rndBufPrintable((uint8_t *)&buf, sizeof(buf));
+
+  } else {
+
+    buf = util_rnd64();
+
+  }
+
+  /* Overwrite with random 1-2-byte values */
+  size_t toCopy = util_rndGet(1, 2);
+  mangle_UseValue(run, (const uint8_t *)&buf, toCopy, printable);
+
+}
+
+static void mangle_ByteRepeatOverwrite(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t destOff = off + 1;
+  size_t maxSz = run->dynfile->size - destOff;
+
+  /* No space to repeat */
+  if (!maxSz) {
+
+    mangle_Bytes(run, printable);
+    return;
+
+  }
+
+  size_t len = mangle_getLen(maxSz);
+  memset(&run->dynfile->data[destOff], run->dynfile->data[off], len);
+
+}
+
+static void mangle_ByteRepeatInsert(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t destOff = off + 1;
+  size_t maxSz = run->dynfile->size - destOff;
+
+  /* No space to repeat */
+  if (!maxSz) {
+
+    mangle_Bytes(run, printable);
+    return;
+
+  }
+
+  size_t len = mangle_getLen(maxSz);
+  len = mangle_Inflate(run, destOff, len, printable);
+  memset(&run->dynfile->data[destOff], run->dynfile->data[off], len);
+
+}
+
+static void mangle_Bit(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  run->dynfile->data[off] ^= (uint8_t)(1U << util_rndGet(0, 7));
+  if (printable) { util_turnToPrintable(&(run->dynfile->data[off]), 1); }
+
+}
+
+static const struct {
+
+  const uint8_t val[8];
+  const size_t  size;
+
+} mangleMagicVals[] = {
+
+    /* 1B - No endianness */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x01\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x02\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x03\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x04\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x05\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x06\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x07\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x08\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x09\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x0A\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x0B\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x0C\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x0D\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x0E\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x0F\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x10\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x20\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x40\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x7E\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x7F\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\x81\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\xC0\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\xFE\x00\x00\x00\x00\x00\x00\x00", 1},
+    {"\xFF\x00\x00\x00\x00\x00\x00\x00", 1},
+    /* 2B - NE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x01\x01\x00\x00\x00\x00\x00\x00", 2},
+    {"\x80\x80\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFF\xFF\x00\x00\x00\x00\x00\x00", 2},
+    /* 2B - BE */
+    {"\x00\x01\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x02\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x03\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x04\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x05\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x06\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x07\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x08\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x09\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x0A\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x0B\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x0C\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x0D\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x0E\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x0F\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x10\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x20\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x40\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x7E\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x7F\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x80\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x81\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\xC0\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\xFE\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\xFF\x00\x00\x00\x00\x00\x00", 2},
+    {"\x7E\xFF\x00\x00\x00\x00\x00\x00", 2},
+    {"\x7F\xFF\x00\x00\x00\x00\x00\x00", 2},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x80\x01\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFF\xFE\x00\x00\x00\x00\x00\x00", 2},
+    /* 2B - LE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x01\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x02\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x03\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x04\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x05\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x06\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x07\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x08\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x09\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x0A\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x0B\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x0C\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x0D\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x0E\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x0F\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x10\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x20\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x40\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x7E\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x7F\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\x81\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\xC0\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFE\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFF\x00\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFF\x7E\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFF\x7F\x00\x00\x00\x00\x00\x00", 2},
+    {"\x00\x80\x00\x00\x00\x00\x00\x00", 2},
+    {"\x01\x80\x00\x00\x00\x00\x00\x00", 2},
+    {"\xFE\xFF\x00\x00\x00\x00\x00\x00", 2},
+    /* 4B - NE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x01\x01\x01\x01\x00\x00\x00\x00", 4},
+    {"\x80\x80\x80\x80\x00\x00\x00\x00", 4},
+    {"\xFF\xFF\xFF\xFF\x00\x00\x00\x00", 4},
+    /* 4B - BE */
+    {"\x00\x00\x00\x01\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x02\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x03\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x04\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x05\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x06\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x07\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x08\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x09\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x0A\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x0B\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x0C\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x0D\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x0E\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x0F\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x10\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x20\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x40\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x7E\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x7F\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x80\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x81\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\xC0\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\xFE\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\xFF\x00\x00\x00\x00", 4},
+    {"\x7E\xFF\xFF\xFF\x00\x00\x00\x00", 4},
+    {"\x7F\xFF\xFF\xFF\x00\x00\x00\x00", 4},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x80\x00\x00\x01\x00\x00\x00\x00", 4},
+    {"\xFF\xFF\xFF\xFE\x00\x00\x00\x00", 4},
+    /* 4B - LE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x01\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x02\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x03\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x04\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x05\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x06\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x07\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x08\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x09\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x0A\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x0B\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x0C\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x0D\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x0E\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x0F\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x10\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x20\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x40\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x7E\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x7F\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\x81\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\xC0\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\xFE\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\xFF\x00\x00\x00\x00\x00\x00\x00", 4},
+    {"\xFF\xFF\xFF\x7E\x00\x00\x00\x00", 4},
+    {"\xFF\xFF\xFF\x7F\x00\x00\x00\x00", 4},
+    {"\x00\x00\x00\x80\x00\x00\x00\x00", 4},
+    {"\x01\x00\x00\x80\x00\x00\x00\x00", 4},
+    {"\xFE\xFF\xFF\xFF\x00\x00\x00\x00", 4},
+    /* 8B - NE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x01\x01\x01\x01\x01\x01\x01\x01", 8},
+    {"\x80\x80\x80\x80\x80\x80\x80\x80", 8},
+    {"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8},
+    /* 8B - BE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x01", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x02", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x03", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x04", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x05", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x06", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x07", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x08", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x09", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x0A", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x0B", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x0C", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x0D", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x0E", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x0F", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x10", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x20", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x40", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x7E", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x7F", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x80", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x81", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\xC0", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\xFE", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\xFF", 8},
+    {"\x7E\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8},
+    {"\x7F\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x80\x00\x00\x00\x00\x00\x00\x01", 8},
+    {"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFE", 8},
+    /* 8B - LE */
+    {"\x00\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x01\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x02\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x03\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x04\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x05\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x06\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x07\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x08\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x09\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x0A\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x0B\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x0C\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x0D\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x0E\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x0F\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x10\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x20\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x40\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x7E\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x7F\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x80\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\x81\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\xC0\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\xFE\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\xFF\x00\x00\x00\x00\x00\x00\x00", 8},
+    {"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x7E", 8},
+    {"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x7F", 8},
+    {"\x00\x00\x00\x00\x00\x00\x00\x80", 8},
+    {"\x01\x00\x00\x00\x00\x00\x00\x80", 8},
+    {"\xFE\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8},
+
+};
+
+static void mangle_Magic(run_t *run, bool printable) {
+
+  uint64_t choice = util_rndGet(0, ARRAYSIZE(mangleMagicVals) - 1);
+  mangle_UseValue(run, mangleMagicVals[choice].val,
+                  mangleMagicVals[choice].size, printable);
+
+}
+
+static void mangle_StaticDict(run_t *run, bool printable) {
+
+  if (run->global->mutate.dictionaryCnt == 0) {
+
+    mangle_Bytes(run, printable);
+    return;
+
+  }
+
+  uint64_t choice = util_rndGet(0, run->global->mutate.dictionaryCnt - 1);
+  mangle_UseValue(run, run->global->mutate.dictionary[choice].val,
+                  run->global->mutate.dictionary[choice].len, printable);
+
+}
+
+static inline const uint8_t *mangle_FeedbackDict(run_t *run, size_t *len) {
+
+  if (!run->global->feedback.cmpFeedback) { return NULL; }
+  cmpfeedback_t *cmpf = run->global->feedback.cmpFeedbackMap;
+  uint32_t       cnt = ATOMIC_GET(cmpf->cnt);
+  if (cnt == 0) { return NULL; }
+  if (cnt > ARRAYSIZE(cmpf->valArr)) { cnt = ARRAYSIZE(cmpf->valArr); }
+  uint32_t choice = util_rndGet(0, cnt - 1);
+  *len = (size_t)ATOMIC_GET(cmpf->valArr[choice].len);
+  if (*len == 0) { return NULL; }
+  return cmpf->valArr[choice].val;
+
+}
+
+static void mangle_ConstFeedbackDict(run_t *run, bool printable) {
+
+  size_t         len;
+  const uint8_t *val = mangle_FeedbackDict(run, &len);
+  if (val == NULL) {
+
+    mangle_Bytes(run, printable);
+    return;
+
+  }
+
+  mangle_UseValue(run, val, len, printable);
+
+}
+
+static void mangle_MemSet(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t len = mangle_getLen(run->dynfile->size - off);
+  int    val =
+      printable ? (int)util_rndPrintable() : (int)util_rndGet(0, UINT8_MAX);
+
+  memset(&run->dynfile->data[off], val, len);
+
+}
+
+static void mangle_RandomOverwrite(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t len = mangle_getLen(run->dynfile->size - off);
+  if (printable) {
+
+    util_rndBufPrintable(&run->dynfile->data[off], len);
+
+  } else {
+
+    util_rndBuf(&run->dynfile->data[off], len);
+
+  }
+
+}
+
+static void mangle_RandomInsert(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t len = mangle_getLen(run->dynfile->size - off);
+
+  len = mangle_Inflate(run, off, len, printable);
+
+  if (printable) {
+
+    util_rndBufPrintable(&run->dynfile->data[off], len);
+
+  } else {
+
+    util_rndBuf(&run->dynfile->data[off], len);
+
+  }
+
+}
+
+static inline void mangle_AddSubWithRange(run_t *run, size_t off, size_t varLen,
+                                          uint64_t range, bool printable) {
+
+  int64_t delta = (int64_t)util_rndGet(0, range * 2) - (int64_t)range;
+
+  switch (varLen) {
+
+    case 1: {
+
+      run->dynfile->data[off] += delta;
+      break;
+
+    }
+
+    case 2: {
+
+      int16_t val;
+      memcpy(&val, &run->dynfile->data[off], sizeof(val));
+      if (util_rnd64() & 0x1) {
+
+        val += delta;
+
+      } else {
+
+        /* Foreign endianess */
+        val = __builtin_bswap16(val);
+        val += delta;
+        val = __builtin_bswap16(val);
+
+      }
+
+      mangle_Overwrite(run, off, (uint8_t *)&val, varLen, printable);
+      break;
+
+    }
+
+    case 4: {
+
+      int32_t val;
+      memcpy(&val, &run->dynfile->data[off], sizeof(val));
+      if (util_rnd64() & 0x1) {
+
+        val += delta;
+
+      } else {
+
+        /* Foreign endianess */
+        val = __builtin_bswap32(val);
+        val += delta;
+        val = __builtin_bswap32(val);
+
+      }
+
+      mangle_Overwrite(run, off, (uint8_t *)&val, varLen, printable);
+      break;
+
+    }
+
+    case 8: {
+
+      int64_t val;
+      memcpy(&val, &run->dynfile->data[off], sizeof(val));
+      if (util_rnd64() & 0x1) {
+
+        val += delta;
+
+      } else {
+
+        /* Foreign endianess */
+        val = __builtin_bswap64(val);
+        val += delta;
+        val = __builtin_bswap64(val);
+
+      }
+
+      mangle_Overwrite(run, off, (uint8_t *)&val, varLen, printable);
+      break;
+
+    }
+
+    default: {
+
+      LOG_F("Unknown variable length size: %zu", varLen);
+
+    }
+
+  }
+
+}
+
+static void mangle_AddSub(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+
+  /* 1,2,4,8 */
+  size_t varLen = 1U << util_rndGet(0, 3);
+  if ((run->dynfile->size - off) < varLen) { varLen = 1; }
+
+  uint64_t range;
+  switch (varLen) {
+
+    case 1:
+      range = 16;
+      break;
+    case 2:
+      range = 4096;
+      break;
+    case 4:
+      range = 1048576;
+      break;
+    case 8:
+      range = 268435456;
+      break;
+    default:
+      LOG_F("Invalid operand size: %zu", varLen);
+
+  }
+
+  mangle_AddSubWithRange(run, off, varLen, range, printable);
+
+}
+
+static void mangle_IncByte(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  if (printable) {
+
+    run->dynfile->data[off] = (run->dynfile->data[off] - 32 + 1) % 95 + 32;
+
+  } else {
+
+    run->dynfile->data[off] += (uint8_t)1UL;
+
+  }
+
+}
+
+static void mangle_DecByte(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  if (printable) {
+
+    run->dynfile->data[off] = (run->dynfile->data[off] - 32 + 94) % 95 + 32;
+
+  } else {
+
+    run->dynfile->data[off] -= (uint8_t)1UL;
+
+  }
+
+}
+
+static void mangle_NegByte(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  if (printable) {
+
+    run->dynfile->data[off] = 94 - (run->dynfile->data[off] - 32) + 32;
+
+  } else {
+
+    run->dynfile->data[off] = ~(run->dynfile->data[off]);
+
+  }
+
+}
+
+static void mangle_Expand(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+  size_t len;
+  if (util_rnd64() % 16) {
+
+    len = mangle_getLen(HF_MIN(16, run->global->mutate.maxInputSz - off));
+
+  } else {
+
+    len = mangle_getLen(run->global->mutate.maxInputSz - off);
+
+  }
+
+  mangle_Inflate(run, off, len, printable);
+
+}
+
+static void mangle_Shrink(run_t *run, bool printable HF_ATTR_UNUSED) {
+
+  if (run->dynfile->size <= 2U) { return; }
+
+  size_t off_start = mangle_getOffSet(run);
+  size_t len = mangle_LenLeft(run, off_start);
+  if (len == 0) { return; }
+  if (util_rnd64() % 16) {
+
+    len = mangle_getLen(HF_MIN(16, len));
+
+  } else {
+
+    len = mangle_getLen(len);
+
+  }
+
+  size_t off_end = off_start + len;
+  size_t len_to_move = run->dynfile->size - off_end;
+
+  mangle_Move(run, off_end, off_start, len_to_move);
+  input_setSize(run, run->dynfile->size - len);
+
+}
+
+static void mangle_ASCIINum(run_t *run, bool printable) {
+
+  size_t len = util_rndGet(2, 8);
+
+  char buf[20];
+  snprintf(buf, sizeof(buf), "%-19" PRId64, (int64_t)util_rnd64());
+
+  mangle_UseValue(run, (const uint8_t *)buf, len, printable);
+
+}
+
+static void mangle_ASCIINumChange(run_t *run, bool printable) {
+
+  size_t off = mangle_getOffSet(run);
+
+  /* Find a digit */
+  for (; off < run->dynfile->size; off++) {
+
+    if (isdigit(run->dynfile->data[off])) { break; }
+
+  }
+
+  if (off == run->dynfile->size) {
+
+    mangle_Bytes(run, printable);
+    return;
+
+  }
+
+  size_t len = HF_MIN(20, run->dynfile->size - off);
+  char   numbuf[21] = {};
+  strncpy(numbuf, (const char *)&run->dynfile->data[off], len);
+  uint64_t val = (uint64_t)strtoull(numbuf, NULL, 10);
+
+  switch (util_rndGet(0, 5)) {
+
+    case 0:
+      val += util_rndGet(1, 256);
+      break;
+    case 1:
+      val -= util_rndGet(1, 256);
+      break;
+    case 2:
+      val *= util_rndGet(1, 256);
+      break;
+    case 3:
+      val /= util_rndGet(1, 256);
+      break;
+    case 4:
+      val = ~(val);
+      break;
+    case 5:
+      val = util_rnd64();
+      break;
+    default:
+      LOG_F("Invalid choice");
+
+  };
+
+  len = HF_MIN((size_t)snprintf(numbuf, sizeof(numbuf), "%" PRIu64, val), len);
+  mangle_Overwrite(run, off, (const uint8_t *)numbuf, len, printable);
+
+}
+
+static void mangle_Splice(run_t *run, bool printable) {
+
+  const uint8_t *buf;
+  size_t         sz = input_getRandomInputAsBuf(run, &buf);
+  if (!sz) {
+
+    mangle_Bytes(run, printable);
+    return;
+
+  }
+
+  size_t remoteOff = mangle_getLen(sz) - 1;
+  size_t len = mangle_getLen(sz - remoteOff);
+  mangle_UseValue(run, &buf[remoteOff], len, printable);
+
+}
+
+static void mangle_Resize(run_t *run, bool printable) {
+
+  ssize_t oldsz = run->dynfile->size;
+  ssize_t newsz = 0;
+
+  uint64_t choice = util_rndGet(0, 32);
+  switch (choice) {
+
+    case 0:                                     /* Set new size arbitrarily */
+      newsz = (ssize_t)util_rndGet(1, run->global->mutate.maxInputSz);
+      break;
+    case 1 ... 4:                         /* Increase size by a small value */
+      newsz = oldsz + (ssize_t)util_rndGet(0, 8);
+      break;
+    case 5:                              /* Increase size by a larger value */
+      newsz = oldsz + (ssize_t)util_rndGet(9, 128);
+      break;
+    case 6 ... 9:                         /* Decrease size by a small value */
+      newsz = oldsz - (ssize_t)util_rndGet(0, 8);
+      break;
+    case 10:                             /* Decrease size by a larger value */
+      newsz = oldsz - (ssize_t)util_rndGet(9, 128);
+      break;
+    case 11 ... 32:                                           /* Do nothing */
+      newsz = oldsz;
+      break;
+    default:
+      LOG_F("Illegal value from util_rndGet: %" PRIu64, choice);
+      break;
+
+  }
+
+  if (newsz < 1) { newsz = 1; }
+  if (newsz > (ssize_t)run->global->mutate.maxInputSz) {
+
+    newsz = run->global->mutate.maxInputSz;
+
+  }
+
+  input_setSize(run, (size_t)newsz);
+  if (newsz > oldsz) {
+
+    if (printable) { memset(&run->dynfile->data[oldsz], ' ', newsz - oldsz); }
+
+  }
+
+}
+
+void mangle_mangleContent(run_t *run, int speed_factor) {
+
+  static void (*const mangleFuncs[])(run_t * run, bool printable) = {
+
+      /* Every *Insert or Expand expands file, so add more Shrink's */
+      mangle_Shrink,
+      mangle_Shrink,
+      mangle_Shrink,
+      mangle_Shrink,
+      mangle_Expand,
+      mangle_Bit,
+      mangle_IncByte,
+      mangle_DecByte,
+      mangle_NegByte,
+      mangle_AddSub,
+      mangle_MemSet,
+      mangle_MemSwap,
+      mangle_MemCopy,
+      mangle_Bytes,
+      mangle_ASCIINum,
+      mangle_ASCIINumChange,
+      mangle_ByteRepeatOverwrite,
+      mangle_ByteRepeatInsert,
+      mangle_Magic,
+      mangle_StaticDict,
+      mangle_ConstFeedbackDict,
+      mangle_RandomOverwrite,
+      mangle_RandomInsert,
+      mangle_Splice,
+
+  };
+
+  if (run->mutationsPerRun == 0U) { return; }
+  if (run->dynfile->size == 0U) {
+
+    mangle_Resize(run, /* printable= */ run->global->cfg.only_printable);
+
+  }
+
+  uint64_t changesCnt = run->global->mutate.mutationsPerRun;
+
+  if (speed_factor < 5) {
+
+    changesCnt = util_rndGet(1, run->global->mutate.mutationsPerRun);
+
+  } else if (speed_factor < 10) {
+
+    changesCnt = run->global->mutate.mutationsPerRun;
+
+  } else {
+
+    changesCnt = HF_MIN(speed_factor, 12);
+    changesCnt = HF_MAX(changesCnt, run->global->mutate.mutationsPerRun);
+
+  }
+
+  /* If last coverage acquisition was more than 5 secs ago, use splicing more
+   * frequently */
+  if ((time(NULL) - ATOMIC_GET(run->global->timing.lastCovUpdate)) > 5) {
+
+    if (util_rnd64() % 2) {
+
+      mangle_Splice(run, run->global->cfg.only_printable);
+
+    }
+
+  }
+
+  for (uint64_t x = 0; x < changesCnt; x++) {
+
+    uint64_t choice = util_rndGet(0, ARRAYSIZE(mangleFuncs) - 1);
+    mangleFuncs[choice](run, /* printable= */ run->global->cfg.only_printable);
+
+  }
+
+  wmb();
+
+}
+
diff --git a/custom_mutators/honggfuzz/mangle.h b/custom_mutators/honggfuzz/mangle.h
new file mode 100644
index 00000000..1b6a4943
--- /dev/null
+++ b/custom_mutators/honggfuzz/mangle.h
@@ -0,0 +1,32 @@
+/*
+ *
+ * honggfuzz - buffer mangling routines
+ * -----------------------------------------
+ *
+ * Author: Robert Swiecki <swiecki@google.com>
+ *
+ * Copyright 2010-2018 by Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ *
+ */
+
+#ifndef _HF_MANGLE_H_
+#define _HF_MANGLE_H_
+
+#include "honggfuzz.h"
+
+extern void mangle_mangleContent(run_t *run, int speed_factor);
+
+#endif
+
diff --git a/custom_mutators/honggfuzz/util.h b/custom_mutators/honggfuzz/util.h
new file mode 120000
index 00000000..51e19654
--- /dev/null
+++ b/custom_mutators/honggfuzz/util.h
@@ -0,0 +1 @@
+common.h
\ No newline at end of file
diff --git a/docs/Changelog.md b/docs/Changelog.md
index 50f5629f..a25cc43c 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -18,6 +18,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - LTO: autodictionary mode is a default
      - LTO: instrim instrumentation disabled, only classic support used
             as it is always better
+  - added honggfuzz mangle as a custom mutator in custom_mutators/honggfuzz :)
   - added afl-frida gum solution to examples/afl_frida (mostly imported
     from https://github.com/meme/hotwax/)
   - small fixes to afl-plot, afl-whatsup and man page creation
-- 
cgit 1.4.1


From 9cddbc04206bd8d1399e5a5311c98fff5be80731 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Fri, 24 Jul 2020 12:26:52 +0200
Subject: add -F option to sync to foreign fuzzer queues

---
 GNUmakefile              |   4 +-
 README.md                |  20 +++---
 TODO.md                  |   2 -
 docs/Changelog.md        |   2 +
 docs/parallel_fuzzing.md |  14 ++++-
 include/afl-fuzz.h       |  13 ++++
 src/afl-fuzz-init.c      | 154 +++++++++++++++++++++++++++++++++++++++++++++++
 src/afl-fuzz-run.c       |   2 +
 src/afl-fuzz.c           |  22 ++++++-
 9 files changed, 211 insertions(+), 22 deletions(-)

(limited to 'docs')

diff --git a/GNUmakefile b/GNUmakefile
index f44ef95e..ab9144b8 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -455,10 +455,10 @@ code-format:
 	./.custom-format.py -i llvm_mode/*.h
 	./.custom-format.py -i llvm_mode/*.cc
 	./.custom-format.py -i gcc_plugin/*.c
-	#./.custom-format.py -i gcc_plugin/*.h
+	@#./.custom-format.py -i gcc_plugin/*.h
 	./.custom-format.py -i gcc_plugin/*.cc
 	./.custom-format.py -i custom_mutators/*/*.c
-	./.custom-format.py -i custom_mutators/*/*.h
+	@#./.custom-format.py -i custom_mutators/*/*.h # destroys input.h :-(
 	./.custom-format.py -i examples/*/*.c
 	./.custom-format.py -i examples/*/*.h
 	./.custom-format.py -i test/*.c
diff --git a/README.md b/README.md
index 4e83021d..b2f41315 100644
--- a/README.md
+++ b/README.md
@@ -366,9 +366,9 @@ If you find other good ones, please send them to us :-)
 
 ## Power schedules
 
-The power schedules were copied from Marcel Böhme's excellent AFLfast
-implementation and expand on the ability to discover new paths and
-therefore may increase the code coverage.
+The power schedules were copied from Marcel Böhme's AFLfast implementation and
+measure differently which queue entries to prefer and therefore may find
+different paths faster for large queues.
 
 The available schedules are:
  
@@ -382,16 +382,10 @@ The available schedules are:
  - mmopt (afl++ experimental)
  - seek (afl++ experimental)
 
-In parallel mode (-M/-S, several instances with the shared queue), we suggest to
-run the main node using the explore or fast schedule (-p explore) and the secondary
-nodes with a combination of cut-off-exponential (-p coe), exponential (-p fast),
-explore (-p explore) and mmopt (-p mmopt) schedules. If a schedule does
-not perform well for a target, restart the secondary nodes with a different schedule.
-
-In single mode, using -p fast is usually slightly more beneficial than the
-default explore mode.
-(We don't want to change the default behavior of afl, so "fast" has not been
-made the default mode).
+In parallel mode (-M/-S, several instances with the shared queue), we suggest
+to run the main node using the default explore schedule (`-p explore`) and the
+secondary nodes with different schedules. If a schedule does not perform well
+for a target, restart the secondary nodes with a different schedule.
 
 More details can be found in the paper published at the 23rd ACM Conference on
 Computer and Communications Security [CCS'16](https://www.sigsac.org/ccs/CCS2016/accepted-papers/)
diff --git a/TODO.md b/TODO.md
index ad3ef83e..ad743b6b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,9 +3,7 @@
 ## Roadmap 2.67+
 
  - -i - + foreign fuzzer sync support: scandir with time sort
- - pre_save custom module example to save away test cases
  - expand on AFL_LLVM_INSTRUMENT_FILE to also support sancov allowlist format
- - allow to sync against honggfuzz and libfuzzer
  - AFL_MAP_SIZE for qemu_mode and unicorn_mode
  - namespace for targets? e.g. network
  - learn from honggfuzz (mutations, maybe ptrace?)
diff --git a/docs/Changelog.md b/docs/Changelog.md
index a25cc43c..bec87d65 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -11,6 +11,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
 
 ### Version ++2.66d (devel)
   - afl-fuzz:
+     - added -F option to allow -M main fuzzers to sync to foreign fuzzers,
+       e.g. honggfuzz or libfuzzer
      - eliminated CPU affinity race condition for -S/-M runs
   - llvm_mode:
      - fixes for laf-intel float splitting (thanks to mark-griffin for
diff --git a/docs/parallel_fuzzing.md b/docs/parallel_fuzzing.md
index 271f8369..2ab1466c 100644
--- a/docs/parallel_fuzzing.md
+++ b/docs/parallel_fuzzing.md
@@ -99,7 +99,15 @@ example may be:
 This is not a concern if you use @@ without -f and let afl-fuzz come up with the
 file name.
 
-## 3) Multi-system parallelization
+## 3) Syncing with non-afl fuzzers or independant instances
+
+A -M main node can be told with the `-F other_fuzzer_queue_directory` option
+to sync results from other fuzzers, e.g. libfuzzer or honggfuzz.
+
+Only the specified directory will by synced into afl, not subdirectories.
+The specified directories do not need to exist yet at the start of afl.
+
+## 4) Multi-system parallelization
 
 The basic operating principle for multi-system parallelization is similar to
 the mechanism explained in section 2. The key difference is that you need to
@@ -176,7 +184,7 @@ It is *not* advisable to skip the synchronization script and run the fuzzers
 directly on a network filesystem; unexpected latency and unkillable processes
 in I/O wait state can mess things up.
 
-## 4) Remote monitoring and data collection
+## 5) Remote monitoring and data collection
 
 You can use screen, nohup, tmux, or something equivalent to run remote
 instances of afl-fuzz. If you redirect the program's output to a file, it will
@@ -200,7 +208,7 @@ Keep in mind that crashing inputs are *not* automatically propagated to the
 main instance, so you may still want to monitor for crashes fleet-wide
 from within your synchronization or health checking scripts (see afl-whatsup).
 
-## 5) Asymmetric setups
+## 6) Asymmetric setups
 
 It is perhaps worth noting that all of the following is permitted:
 
diff --git a/include/afl-fuzz.h b/include/afl-fuzz.h
index c9f84c61..cf4254ac 100644
--- a/include/afl-fuzz.h
+++ b/include/afl-fuzz.h
@@ -347,6 +347,13 @@ struct afl_pass_stat {
 
 };
 
+struct foreign_sync {
+
+  u8 *   dir;
+  time_t ctime;
+
+};
+
 typedef struct afl_state {
 
   /* Position of this state in the global states list */
@@ -574,6 +581,11 @@ typedef struct afl_state {
   u8 describe_op_buf_256[256]; /* describe_op will use this to return a string
                                   up to 256 */
 
+/* foreign sync */
+#define FOREIGN_SYNCS_MAX 32
+  u8                  foreign_sync_cnt;
+  struct foreign_sync foreign_syncs[FOREIGN_SYNCS_MAX];
+
 #ifdef _AFL_DOCUMENT_MUTATIONS
   u8  do_document;
   u32 document_counter;
@@ -937,6 +949,7 @@ void   fix_up_banner(afl_state_t *, u8 *);
 void   check_if_tty(afl_state_t *);
 void   setup_signal_handlers(void);
 void   save_cmdline(afl_state_t *, u32, char **);
+void   read_foreign_testcases(afl_state_t *, int);
 
 /* CmpLog */
 
diff --git a/src/afl-fuzz-init.c b/src/afl-fuzz-init.c
index 609e16ba..65ad0c9f 100644
--- a/src/afl-fuzz-init.c
+++ b/src/afl-fuzz-init.c
@@ -438,6 +438,159 @@ static void shuffle_ptrs(afl_state_t *afl, void **ptrs, u32 cnt) {
 
 }
 
+/* Read all testcases from foreign input directories, then queue them for
+   testing. Called at startup and at sync intervals.
+   Does not descend into subdirectories! */
+
+void read_foreign_testcases(afl_state_t *afl, int first) {
+
+  if (!afl->foreign_sync_cnt) return;
+
+  struct dirent **nl;
+  s32             nl_cnt;
+  u32             i, iter;
+
+  u8 val_buf[2][STRINGIFY_VAL_SIZE_MAX];
+
+  for (iter = 0; iter < afl->foreign_sync_cnt; iter++) {
+
+    if (afl->foreign_syncs[iter].dir != NULL &&
+        afl->foreign_syncs[iter].dir[0] != 0) {
+
+      if (first) ACTF("Scanning '%s'...", afl->foreign_syncs[iter].dir);
+      time_t ctime_max = 0;
+
+      /* We use scandir() + alphasort() rather than readdir() because otherwise,
+         the ordering of test cases would vary somewhat randomly and would be
+         difficult to control. */
+
+      nl_cnt = scandir(afl->foreign_syncs[iter].dir, &nl, NULL, NULL);
+
+      if (nl_cnt < 0) {
+
+        if (first) {
+
+          WARNF("Unable to open directory '%s'", afl->foreign_syncs[iter].dir);
+          sleep(1);
+
+        }
+
+        continue;
+
+      }
+
+      if (nl_cnt == 0) {
+
+        if (first)
+          WARNF("directory %s is currently empty",
+                afl->foreign_syncs[iter].dir);
+        continue;
+
+      }
+
+      /* Show stats */
+
+      snprintf(afl->stage_name_buf, STAGE_BUF_SIZE, "foreign sync %u", iter);
+
+      afl->stage_name = afl->stage_name_buf;
+      afl->stage_cur = 0;
+      afl->stage_max = 0;
+
+      for (i = 0; i < nl_cnt; ++i) {
+
+        struct stat st;
+
+        u8 *fn2 =
+            alloc_printf("%s/%s", afl->foreign_syncs[iter].dir, nl[i]->d_name);
+
+        free(nl[i]);                                         /* not tracked */
+
+        if (unlikely(lstat(fn2, &st) || access(fn2, R_OK))) {
+
+          if (first) PFATAL("Unable to access '%s'", fn2);
+          continue;
+
+        }
+
+        /* we detect new files by their ctime */
+        if (likely(st.st_ctime <= afl->foreign_syncs[iter].ctime)) {
+
+          ck_free(fn2);
+          continue;
+
+        }
+
+        /* This also takes care of . and .. */
+
+        if (!S_ISREG(st.st_mode) || !st.st_size || strstr(fn2, "/README.txt")) {
+
+          ck_free(fn2);
+          continue;
+
+        }
+
+        if (st.st_size > MAX_FILE) {
+
+          if (first)
+            WARNF(
+                "Test case '%s' is too big (%s, limit is %s), skipping", fn2,
+                stringify_mem_size(val_buf[0], sizeof(val_buf[0]), st.st_size),
+                stringify_mem_size(val_buf[1], sizeof(val_buf[1]), MAX_FILE));
+          ck_free(fn2);
+          continue;
+
+        }
+
+        // lets do not use add_to_queue(afl, fn2, st.st_size, 0);
+        // as this could add duplicates of the startup input corpus
+
+        int fd = open(fn2, O_RDONLY);
+        if (fd < 0) {
+
+          ck_free(fn2);
+          continue;
+
+        }
+
+        u8  fault;
+        u8 *mem = mmap(0, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+
+        if (mem == MAP_FAILED) {
+
+          ck_free(fn2);
+          continue;
+
+        }
+
+        write_to_testcase(afl, mem, st.st_size);
+        fault = fuzz_run_target(afl, &afl->fsrv, afl->fsrv.exec_tmout);
+        afl->syncing_party = "foreign";
+        afl->queued_imported +=
+            save_if_interesting(afl, mem, st.st_size, fault);
+        afl->syncing_party = 0;
+        munmap(mem, st.st_size);
+        close(fd);
+
+        if (st.st_ctime > ctime_max) ctime_max = st.st_ctime;
+
+      }
+
+      afl->foreign_syncs[iter].ctime = ctime_max;
+      free(nl);                                              /* not tracked */
+
+    }
+
+  }
+
+  if (first) {
+
+    afl->last_path_time = 0;
+    afl->queued_at_start = afl->queued_paths;
+
+  }
+
+}
+
 /* Read all testcases from the input directory, then queue them for testing.
    Called at startup. */
 
@@ -530,6 +683,7 @@ void read_testcases(afl_state_t *afl) {
       WARNF("Test case '%s' is too big (%s, limit is %s), skipping", fn2,
             stringify_mem_size(val_buf[0], sizeof(val_buf[0]), st.st_size),
             stringify_mem_size(val_buf[1], sizeof(val_buf[1]), MAX_FILE));
+      ck_free(fn2);
       continue;
 
     }
diff --git a/src/afl-fuzz-run.c b/src/afl-fuzz-run.c
index 2a1664e2..6e3be72b 100644
--- a/src/afl-fuzz-run.c
+++ b/src/afl-fuzz-run.c
@@ -612,6 +612,8 @@ void sync_fuzzers(afl_state_t *afl) {
 
   }
 
+  if (afl->foreign_sync_cnt) read_foreign_testcases(afl, 0);
+
 }
 
 /* Trim all new test cases to save cycles when doing deterministic checks. The
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index df2896d2..f03c545d 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -131,10 +131,13 @@ static void usage(afl_state_t *afl, u8 *argv0, int more_help) {
       "executions.\n\n"
 
       "Other stuff:\n"
-      "  -T text       - text banner to show on the screen\n"
       "  -M/-S id      - distributed mode (see docs/parallel_fuzzing.md)\n"
       "                  use -D to force -S secondary to perform deterministic "
       "fuzzing\n"
+      "  -F path       - sync to a foreign fuzzer queue directory (requires "
+      "-M, can\n"
+      "                  be specified up to %u times)\n"
+      "  -T text       - text banner to show on the screen\n"
       "  -I command    - execute this command/script when a new crash is "
       "found\n"
       //"  -B bitmap.txt - mutate a specific test case, use the out/fuzz_bitmap
@@ -142,7 +145,7 @@ static void usage(afl_state_t *afl, u8 *argv0, int more_help) {
       "  -C            - crash exploration mode (the peruvian rabbit thing)\n"
       "  -e ext        - file extension for the fuzz test input file (if "
       "needed)\n\n",
-      argv0, EXEC_TIMEOUT, MEM_LIMIT);
+      argv0, EXEC_TIMEOUT, MEM_LIMIT, FOREIGN_SYNCS_MAX);
 
   if (more_help > 1) {
 
@@ -403,6 +406,19 @@ int main(int argc, char **argv_orig, char **envp) {
         afl->use_splicing = 1;
         break;
 
+      case 'F':                                         /* foreign sync dir */
+
+        if (!afl->is_main_node)
+          FATAL(
+              "Option -F can only be specified after the -M option for the "
+              "main fuzzer of a fuzzing campaign");
+        if (afl->foreign_sync_cnt >= FOREIGN_SYNCS_MAX)
+          FATAL("Maximum %u entried of -F option can be specified",
+                FOREIGN_SYNCS_MAX);
+        afl->foreign_syncs[afl->foreign_sync_cnt].dir = optarg;
+        afl->foreign_sync_cnt++;
+        break;
+
       case 'f':                                              /* target file */
 
         if (afl->fsrv.out_file) { FATAL("Multiple -f options not supported"); }
@@ -1059,6 +1075,8 @@ int main(int argc, char **argv_orig, char **envp) {
   setup_cmdline_file(afl, argv + optind);
 
   read_testcases(afl);
+  // read_foreign_testcases(afl, 1); for the moment dont do this
+
   load_auto(afl);
 
   pivot_inputs(afl);
-- 
cgit 1.4.1


From 79598083849b34bf33c4a6c904e69c2743151082 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Fri, 24 Jul 2020 16:39:50 +0200
Subject: llvm12 support

---
 README.md               |  6 +++---
 docs/Changelog.md       |  1 +
 llvm_mode/GNUmakefile   | 11 ++++++-----
 llvm_mode/README.lto.md | 26 +++++++++++++-------------
 llvm_mode/README.md     |  4 ++--
 5 files changed, 25 insertions(+), 23 deletions(-)

(limited to 'docs')

diff --git a/README.md b/README.md
index b2f41315..9c802285 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@
   get any feature improvements since November 2017.
 
   Among other changes afl++ has a more performant llvm_mode, supports
-  llvm up to version 11, QEMU 3.1, more speed and crashfixes for QEMU,
+  llvm up to version 12, QEMU 3.1, more speed and crashfixes for QEMU,
   better *BSD and Android support and much, much more.
 
   Additionally the following features and patches have been integrated:
@@ -268,7 +268,7 @@ superior to blind fuzzing or coverage-only tools.
 PLEASE NOTE: llvm_mode compilation with afl-clang-fast/afl-clang-fast++
 instead of afl-gcc/afl-g++ is much faster and has many cool features.
 See llvm_mode/ - however few code does not compile with llvm.
-We support llvm versions 3.4 to 11.
+We support llvm versions 3.4 to 12.
 
 When source code is available, instrumentation can be injected by a companion
 tool that works as a drop-in replacement for gcc or clang in any standard build
@@ -291,7 +291,7 @@ For C++ programs, you'd would also want to set `CXX=/path/to/afl/afl-g++`.
 The clang wrappers (afl-clang and afl-clang++) can be used in the same way;
 clang users may also opt to leverage a higher-performance instrumentation mode,
 as described in [llvm_mode/README.md](llvm_mode/README.md).
-Clang/LLVM has a much better performance and works with LLVM version 3.4 to 11.
+Clang/LLVM has a much better performance and works with LLVM version 3.4 to 12.
 
 Using the LAF Intel performance enhancements are also recommended, see 
 [llvm_mode/README.laf-intel.md](llvm_mode/README.laf-intel.md)
diff --git a/docs/Changelog.md b/docs/Changelog.md
index bec87d65..38787def 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -15,6 +15,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
        e.g. honggfuzz or libfuzzer
      - eliminated CPU affinity race condition for -S/-M runs
   - llvm_mode:
+     - now supports llvm 12!
      - fixes for laf-intel float splitting (thanks to mark-griffin for
        reporting)
      - LTO: autodictionary mode is a default
diff --git a/llvm_mode/GNUmakefile b/llvm_mode/GNUmakefile
index b5d026ef..443322d7 100644
--- a/llvm_mode/GNUmakefile
+++ b/llvm_mode/GNUmakefile
@@ -32,15 +32,16 @@ ifeq "$(shell uname)" "OpenBSD"
   LLVM_CONFIG ?= $(BIN_PATH)/llvm-config
   HAS_OPT = $(shell test -x $(BIN_PATH)/opt && echo 0 || echo 1)
   ifeq "$(HAS_OPT)" "1"
-    $(error llvm_mode needs a complete llvm installation (versions 3.4 up to 11) -> e.g. "pkg_add llvm-7.0.1p9")
+    $(error llvm_mode needs a complete llvm installation (versions 3.4 up to 12) -> e.g. "pkg_add llvm-7.0.1p9")
   endif
 else
   LLVM_CONFIG ?= llvm-config
 endif
 
 LLVMVER  = $(shell $(LLVM_CONFIG) --version 2>/dev/null | sed 's/git//' )
-LLVM_UNSUPPORTED = $(shell $(LLVM_CONFIG) --version 2>/dev/null | egrep -q '^3\.[0-3]|^1[2-9]' && echo 1 || echo 0 )
+LLVM_UNSUPPORTED = $(shell $(LLVM_CONFIG) --version 2>/dev/null | egrep -q '^3\.[0-3]|^1[3-9]' && echo 1 || echo 0 )
 LLVM_NEW_API = $(shell $(LLVM_CONFIG) --version 2>/dev/null | egrep -q '^1[0-9]' && echo 1 || echo 0 )
+LLVM_HAVE_LTO = $(shell $(LLVM_CONFIG) --version 2>/dev/null | egrep -q '^1[1-9]' && echo 1 || echo 0 )
 LLVM_MAJOR = $(shell $(LLVM_CONFIG) --version 2>/dev/null | sed 's/\..*//')
 LLVM_BINDIR = $(shell $(LLVM_CONFIG) --bindir 2>/dev/null)
 LLVM_LIBDIR = $(shell $(LLVM_CONFIG) --libdir 2>/dev/null)
@@ -53,7 +54,7 @@ ifeq "$(LLVMVER)" ""
 endif
 
 ifeq "$(LLVM_UNSUPPORTED)" "1"
-  $(warning llvm_mode only supports llvm versions 3.4 up to 11)
+  $(warning llvm_mode only supports llvm versions 3.4 up to 12)
 endif
 
 ifeq "$(LLVM_MAJOR)" "9"
@@ -65,8 +66,8 @@ ifeq "$(LLVM_NEW_API)" "1"
   LLVM_STDCXX = c++14
 endif
 
-ifeq "$(LLVM_MAJOR)" "11"
-  $(info [+] llvm_mode detected llvm 11, enabling afl-clang-lto LTO implementation)
+ifeq "$(LLVM_HAVE_LTO)" "1"
+  $(info [+] llvm_mode detected llvm 11+, enabling afl-clang-lto LTO implementation)
   LLVM_LTO = 1
   #TEST_MMAP = 1
 endif
diff --git a/llvm_mode/README.lto.md b/llvm_mode/README.lto.md
index 967a31aa..d54d4ee0 100644
--- a/llvm_mode/README.lto.md
+++ b/llvm_mode/README.lto.md
@@ -2,7 +2,7 @@
 
 ## TLDR;
 
-This version requires a current llvm 11 compiled from the github master.
+This version requires a current llvm 11+ compiled from the github master.
 
 1. Use afl-clang-lto/afl-clang-lto++ because it is faster and gives better
    coverage than anything else that is out there in the AFL world
@@ -10,7 +10,7 @@ This version requires a current llvm 11 compiled from the github master.
 2. You can use it together with llvm_mode: laf-intel and the instrument file listing
    features and can be combined with cmplog/Redqueen
 
-3. It only works with llvm 11 (current github master state)
+3. It only works with llvm 11+
 
 4. AUTODICTIONARY feature! see below
 
@@ -61,9 +61,9 @@ AUTODICTIONARY: 11 strings found
 [+] Instrumented 12071 locations with no collisions (on average 1046 collisions would be in afl-gcc/afl-clang-fast) (non-hardened mode).
 ```
 
-## Getting llvm 11
+## Getting llvm 11+
 
-### Installing llvm 11 from the llvm repository
+### Installing llvm from the llvm repository (version 11)
 
 Installing the llvm snapshot builds is easy and mostly painless:
 
@@ -83,7 +83,7 @@ apt-get install -y clang-11 clang-tools-11 libc++1-11 libc++-11-dev \
     libomp5-11 lld-11 lldb-11 llvm-11 llvm-11-dev llvm-11-runtime llvm-11-tools
 ```
 
-### Building llvm 11 yourself
+### Building llvm yourself (version 12)
 
 Building llvm from github takes quite some long time and is not painless:
 ```
@@ -201,15 +201,15 @@ cd WebKit
 ```
 mkdir -p WebKitBuild/Release
 cd WebKitBuild/Release
-ln -s ../../../../../usr/bin/llvm-ar-11 llvm-ar-11
-ln -s ../../../../../usr/bin/llvm-ranlib-11 llvm-ranlib-11
+ln -s ../../../../../usr/bin/llvm-ar-12 llvm-ar-12
+ln -s ../../../../../usr/bin/llvm-ranlib-12 llvm-ranlib-12
 cd ../..
 ```
 
 3. Build :)
 
 ```
-Tools/Scripts/build-jsc --jsc-only --cli --cmakeargs="-DCMAKE_AR='llvm-ar-11' -DCMAKE_RANLIB='llvm-ranlib-11' -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -DCMAKE_CC_FLAGS='-O3 -lrt' -DCMAKE_CXX_FLAGS='-O3 -lrt' -DIMPORTED_LOCATION='/lib/x86_64-linux-gnu/' -DCMAKE_CC=afl-clang-lto -DCMAKE_CXX=afl-clang-lto++ -DENABLE_STATIC_JSC=ON"
+Tools/Scripts/build-jsc --jsc-only --cli --cmakeargs="-DCMAKE_AR='llvm-ar-12' -DCMAKE_RANLIB='llvm-ranlib-12' -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -DCMAKE_CC_FLAGS='-O3 -lrt' -DCMAKE_CXX_FLAGS='-O3 -lrt' -DIMPORTED_LOCATION='/lib/x86_64-linux-gnu/' -DCMAKE_CC=afl-clang-lto -DCMAKE_CXX=afl-clang-lto++ -DENABLE_STATIC_JSC=ON"
 ```
 
 ## Potential issues
@@ -246,17 +246,17 @@ AS=llvm-as  ...
 afl-clang-lto is still work in progress.
 
 Known issues:
-  * Anything that llvm 11 cannot compile, afl-clang-lto can not compile either - obviously
+  * Anything that llvm 11+ cannot compile, afl-clang-lto can not compile either - obviously
   * Anything that does not compile with LTO, afl-clang-lto can not compile either - obviously
 
-Hence if building a target with afl-clang-lto fails try to build it with llvm11
-and LTO enabled (`CC=clang-11` `CXX=clang++-11` `CFLAGS=-flto=full` and
+Hence if building a target with afl-clang-lto fails try to build it with llvm12
+and LTO enabled (`CC=clang-12` `CXX=clang++-12` `CFLAGS=-flto=full` and
 `CXXFLAGS=-flto=full`).
 
 If this succeeeds then there is an issue with afl-clang-lto. Please report at
 [https://github.com/AFLplusplus/AFLplusplus/issues/226](https://github.com/AFLplusplus/AFLplusplus/issues/226)
 
-Even some targets where clang-11 fails can be build if the fail is just in
+Even some targets where clang-12 fails can be build if the fail is just in
 `./configure`, see `Solving difficult targets` above.
 
 ### Target crashes immediately
@@ -296,7 +296,7 @@ Still more problems came up though as this only works without bugs from
 llvm 9 onwards, and with high optimization the link optimization ruins
 the instrumented control flow graph.
 
-This is all now fixed with llvm 11. The llvm's own linker is now able to
+This is all now fixed with llvm 11+. The llvm's own linker is now able to
 load passes and this bypasses all problems we had.
 
 Happy end :)
diff --git a/llvm_mode/README.md b/llvm_mode/README.md
index e2e22751..22088dfd 100644
--- a/llvm_mode/README.md
+++ b/llvm_mode/README.md
@@ -6,7 +6,7 @@
 
 ## 1) Introduction
 
-! llvm_mode works with llvm versions 3.4 up to 11 !
+! llvm_mode works with llvm versions 3.4 up to 12 !
 
 The code in this directory allows you to instrument programs for AFL using
 true compiler-level instrumentation, instead of the more crude
@@ -183,4 +183,4 @@ AFL_LLVM_INSTRUMENT=PCGUARD  make
 ```
 
 Note that this us currently the default, as it is the best mode.
-If you have llvm 11 and compiled afl-clang-lto - this is the only better mode.
+If you have llvm 11+ and compiled afl-clang-lto - this is the only better mode.
-- 
cgit 1.4.1


From 1bbeef48e154389cb5ac5adcb7a55f5b78c2bac6 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Mon, 27 Jul 2020 09:10:48 +0200
Subject: update readme, renice -20

---
 GNUmakefile         |    2 +-
 README.md           |  595 +++++++++++++++++++++++-----
 README_new.md       | 1065 ---------------------------------------------------
 docs/screenshot.png |  Bin 0 -> 117199 bytes
 src/afl-fuzz.c      |    1 +
 5 files changed, 500 insertions(+), 1163 deletions(-)
 delete mode 100644 README_new.md
 create mode 100644 docs/screenshot.png

(limited to 'docs')

diff --git a/GNUmakefile b/GNUmakefile
index ab9144b8..e2d7314f 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -96,7 +96,7 @@ ifneq "$(shell uname -m)" "x86_64"
 endif
 
 CFLAGS     ?= -O3 -funroll-loops $(CFLAGS_OPT)
-override CFLAGS += -Wall -g -Wno-pointer-sign -Wmissing-declarations\
+override CFLAGS += -Wall -g -Wno-pointer-sign -Wmissing-declarations -Wno-unused-result \
 			  -I include/ -DAFL_PATH=\"$(HELPER_PATH)\" \
 			  -DBIN_PATH=\"$(BIN_PATH)\" -DDOC_PATH=\"$(DOC_PATH)\"
 
diff --git a/README.md b/README.md
index 9c802285..97fa99b7 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# american fuzzy lop plus plus (afl++)
+# American Fuzzy Lop plus plus (afl++)
 
   <img align="right" src="https://raw.githubusercontent.com/andreafioraldi/AFLplusplus-website/master/static/logo_256x256.png" alt="AFL++ Logo">
 
@@ -8,61 +8,36 @@
 
   Github Version: 2.66d
 
-  includes all necessary/interesting changes from Google's afl 2.56b
-
-  Originally developed by Michal "lcamtuf" Zalewski.
-
   Repository: [https://github.com/AFLplusplus/AFLplusplus](https://github.com/AFLplusplus/AFLplusplus)
 
   afl++ is maintained by:
-    * Marc "van Hauser" Heuse <mh@mh-sec.de>,
-    * Heiko "hexcoder-" Eißfeldt <heiko.eissfeldt@hexco.de>,
-    * Andrea Fioraldi <andreafioraldi@gmail.com> and
-    * Dominik Maier <mail@dmnk.co>.
-
-  Note that although afl now has a Google afl repository [https://github.com/Google/afl](https://github.com/Google/afl),
-  it is unlikely to receive any notable enhancements: [https://twitter.com/Dor3s/status/1154737061787660288](https://twitter.com/Dor3s/status/1154737061787660288)
-
-## The enhancements compared to the original stock afl
-
-  Many improvements were made over the official afl release - which did not
-  get any feature improvements since November 2017.
-
-  Among other changes afl++ has a more performant llvm_mode, supports
-  llvm up to version 12, QEMU 3.1, more speed and crashfixes for QEMU,
-  better *BSD and Android support and much, much more.
 
-  Additionally the following features and patches have been integrated:
-
-  * AFLfast's power schedules by Marcel Böhme: [https://github.com/mboehme/aflfast](https://github.com/mboehme/aflfast)
-
-  * The new excellent MOpt mutator: [https://github.com/puppet-meteor/MOpt-AFL](https://github.com/puppet-meteor/MOpt-AFL)
-
-  * InsTrim, a very effective CFG llvm_mode instrumentation implementation for large targets: [https://github.com/csienslab/instrim](https://github.com/csienslab/instrim)
-
-  * C. Holler's afl-fuzz Python mutator module and llvm_mode instrument file support: [https://github.com/choller/afl](https://github.com/choller/afl)
+  * Marc "van Hauser" Heuse <mh@mh-sec.de>,
+  * Heiko "hexcoder-" Eißfeldt <heiko.eissfeldt@hexco.de>,
+  * Andrea Fioraldi <andreafioraldi@gmail.com> and
+  * Dominik Maier <mail@dmnk.co>.
 
-  * Custom mutator by a library (instead of Python) by kyakdan
-
-  * Unicorn mode which allows fuzzing of binaries from completely different platforms (integration provided by domenukk)
-
-  * LAF-Intel or CompCov support for llvm_mode, qemu_mode and unicorn_mode
-
-  * NeverZero patch for afl-gcc, llvm_mode, qemu_mode and unicorn_mode which prevents a wrapping map value to zero, increases coverage
-  
-  * Persistent mode and deferred forkserver for qemu_mode
-  
-  * Win32 PE binary-only fuzzing with QEMU and Wine
+  Originally developed by Michal "lcamtuf" Zalewski.
 
-  * Radamsa mutator (as a custom mutator).
+  afl++ is a superiour fork to Google's afl - more speed, more and better
+  mutations, more and better instrumentation, custom module support, etc.
 
-  * QBDI mode to fuzz android native libraries via QBDI framework
+## Contents
 
-  * The new CmpLog instrumentation for LLVM and QEMU inspired by [Redqueen](https://www.syssec.ruhr-uni-bochum.de/media/emma/veroeffentlichungen/2018/12/17/NDSS19-Redqueen.pdf)
+  1. [Features](#important-features-of-afl)
+  2. [How to compile and install afl++](#building-and-installing-afl)
+  3. [How to fuzz a target](#how-to-fuzz-with-afl)
+  4. [Fuzzing binary-only targets](#fuzzing-binary-only-targets)
+  5. [Good examples and writeups of afl++ usages](#good-examples-and-writeups)
+  6. [Branches](#branches)
+  7. [Want to help?](#help-wanted)
+  8. [Detailed help and description of afl++](#challenges-of-guided-fuzzing)
 
-  * LLVM mode Ngram coverage by Adrian Herrera [https://github.com/adrianherrera/afl-ngram-pass](https://github.com/adrianherrera/afl-ngram-pass)
+## Important features of afl++
 
-  A more thorough list is available in the [PATCHES](docs/PATCHES.md) file.
+  afl++ supports llvm up to version 12, very fast binary fuzzing with QEMU 3.1
+  with laf-intel and redqueen, unicorn mode, gcc plugin, full *BSD, Solaris and
+  Android support and much, much, much more.
 
   | Feature/Instrumentation | afl-gcc | llvm_mode | gcc_plugin | qemu_mode        | unicorn_mode |
   | ----------------------- |:-------:|:---------:|:----------:|:----------------:|:------------:|
@@ -75,6 +50,7 @@
   | InsTrim                 |         |     x     |            |                  |              |
   | Ngram prev_loc coverage |         |     x(6)  |            |                  |              |
   | Context coverage        |         |     x     |            |                  |              |
+  | Auto dictionary         |         |     x(7)  |            |                  |              |
   | Snapshot LKM support    |         |     x     |            |        (x)(5)    |              |
 
   neverZero:
@@ -85,11 +61,45 @@
 
   (3) partially via AFL_CODE_START/AFL_CODE_END
 
-  (4) Only for LLVM >= 11 and not all targets compile
+  (4) with pcguard mode and LTO mode for LLVM >= 11
 
   (5) upcoming, development in the branch
 
   (6) not compatible with LTO instrumentation and needs at least LLVM >= 4.1
+  
+  (7) only in LTO mode with LLVM >= 11
+
+  Among others, the following features and patches have been integrated:
+
+  * NeverZero patch for afl-gcc, llvm_mode, qemu_mode and unicorn_mode which prevents a wrapping map value to zero, increases coverage
+  
+  * Persistent mode and deferred forkserver for qemu_mode
+  
+  * Unicorn mode which allows fuzzing of binaries from completely different platforms (integration provided by domenukk)
+
+  * The new CmpLog instrumentation for LLVM and QEMU inspired by [Redqueen](https://www.syssec.ruhr-uni-bochum.de/media/emma/veroeffentlichungen/2018/12/17/NDSS19-Redqueen.pdf)
+
+  * Win32 PE binary-only fuzzing with QEMU and Wine
+
+  * AFLfast's power schedules by Marcel Böhme: [https://github.com/mboehme/aflfast](https://github.com/mboehme/aflfast)
+
+  * The MOpt mutator: [https://github.com/puppet-meteor/MOpt-AFL](https://github.com/puppet-meteor/MOpt-AFL)
+
+  * LLVM mode Ngram coverage by Adrian Herrera [https://github.com/adrianherrera/afl-ngram-pass](https://github.com/adrianherrera/afl-ngram-pass)
+
+  * InsTrim, an effective CFG llvm_mode instrumentation implementation for large targets: [https://github.com/csienslab/instrim](https://github.com/csienslab/instrim)
+
+  * C. Holler's afl-fuzz Python mutator module and llvm_mode instrument file support: [https://github.com/choller/afl](https://github.com/choller/afl)
+
+  * Custom mutator by a library (instead of Python) by kyakdan
+
+  * LAF-Intel/CompCov support for llvm_mode, qemu_mode and unicorn_mode (with enhanced capabilities)
+
+  * Radamsa and hongfuzz mutators (as custom mutators).
+
+  * QBDI mode to fuzz android native libraries via QBDI framework
+
+  A more thorough list is available in the [PATCHES](docs/PATCHES.md) file.
 
   So all in all this is the best-of afl that is currently out there :-)
 
@@ -115,7 +125,7 @@
 
   For releases, please see the [Releases](https://github.com/AFLplusplus/AFLplusplus/releases) tab.
 
-## Google Summer of Code 2020 (and any other students and enthusiast developers)
+## Help wanted
 
 We are happy to be part of [Google Summer of Code 2020](https://summerofcode.withgoogle.com/organizations/5100744400699392/)! :-)
 
@@ -140,7 +150,7 @@ hence afl-clang-lto is available!) or just pull directly from the docker hub:
 docker pull aflplusplus/aflplusplus
 docker run -ti -v /location/of/your/target:/src aflplusplus/aflplusplus
 ```
-This container is automatically generated when a push to master happens.
+This image is automatically generated when a push to master happens.
 You will find your target source code in /src in the container.
 
 If you want to build afl++ yourself you have many options.
@@ -151,7 +161,7 @@ sudo apt install build-essential libtool-bin python3-dev automake flex bison lib
 make distrib
 sudo make install
 ```
-It is recommended to install the newest available gcc and clang and llvm-dev
+It is recommended to install the newest available gcc, clang and llvm-dev
 possible in your distribution!
 
 Note that "make distrib" also builds llvm_mode, qemu_mode, unicorn_mode and
@@ -197,6 +207,444 @@ These build options exist:
 
 e.g.: make ASAN_BUILD=1
 
+## Good examples and writeups
+
+Here are some good writeups to show how to effectively use AFL++:
+
+ * [https://aflplus.plus/docs/tutorials/libxml2_tutorial/](https://aflplus.plus/docs/tutorials/libxml2_tutorial/)
+ * [https://bananamafia.dev/post/gb-fuzz/](https://bananamafia.dev/post/gb-fuzz/)
+ * [https://securitylab.github.com/research/fuzzing-challenges-solutions-1](https://securitylab.github.com/research/fuzzing-challenges-solutions-1)
+ * [https://securitylab.github.com/research/fuzzing-sockets-FTP](https://securitylab.github.com/research/fuzzing-sockets-FTP)
+
+If you are interested in fuzzing structured data (where you define what the
+structure is), these links have you covered:
+ * Superion for afl++: [https://github.com/adrian-rt/superion-mutator](https://github.com/adrian-rt/superion-mutator)
+ * libprotobuf raw: [https://github.com/bruce30262/libprotobuf-mutator_fuzzing_learning/tree/master/4_libprotobuf_aflpp_custom_mutator](https://github.com/bruce30262/libprotobuf-mutator_fuzzing_learning/tree/master/4_libprotobuf_aflpp_custom_mutator)
+ * libprotobuf for old afl++ API: [https://github.com/thebabush/afl-libprotobuf-mutator](https://github.com/thebabush/afl-libprotobuf-mutator)
+
+If you find other good ones, please send them to us :-)
+
+## How to fuzz with afl++
+
+The following describes how to fuzz with a target if source code is available.
+If you have a binary-only target please skip to [#Instrumenting binary-only apps](#Instrumenting binary-only apps)
+
+Fuzzing source code is a two step process.
+
+1. compile the target with a special compiler that prepares the target to be
+   fuzzed efficiently. This step is called "instrumenting a target".
+2. Prepare the fuzzing by selecting and optimizing the input corpus for the
+   target.
+3. perform the fuzzing of the target by randomly mutating input and assessing
+   if a generated input was processed in a new path in the target binary
+
+### 1. Instrumenting that target
+
+#### a) Selecting the best afl++ compiler for instrumenting the target
+
+afl++ comes with different compilers and instrumentation options.
+The following evaluation flow will help you to select the best possible.
+
+It is highly recommended to have the newest llvm version possible installed,
+anything below 9 is not recommended.
+
+```
++--------------------------------+
+| clang/clang++ 11+ is available | --> use afl-clang-lto and afl-clang-lto++
++--------------------------------+     see [llvm/README.lto.md](llvm/README.lto.md)
+    |
+    | if not, or if the target fails with with afl-clang-lto/++
+    |
+    v
++---------------------------------+
+| clang/clang++ 3.3+ is available | --> use afl-clang-fast and afl-clang-fast++
++---------------------------------+     see [llvm/README.md](llvm/README.md)
+    |
+    | if not, or if the target fails with afl-clang-fast/++
+    |
+    v
+ +--------------------------------+
+ | if you want to instrument only | -> use afl-gcc-fast and afl-gcc-fast++
+ | parts of the target            |    see [gcc_plugin/README.md](gcc_plugin/README.md) and
+ +--------------------------------+    [gcc_plugin/README.instrument_file.md](gcc_plugin/README.instrument_file.md)
+    |
+    | if not, or if you do not have a gcc with plugin support
+    |
+    v
+   use afl-gcc and afl-g++
+```
+
+#### b) Selecting instrumentation options
+
+The following options are available when you instrument with afl-clang-fast or
+afl-clang-lto:
+
+ * Splitting integer, string, float and switch compares so afl++ can easier
+   solve these. This is an important option if you do not have a very good
+   good and large input corpus. This technique is called laf-intel or COMPCOV.
+   To use this set the following environment variable before compiling the
+   target: `export AFL_LLVM_LAF_ALL=1`
+   You can read more about this in [llvm/README.laf-intel.md](llvm/README.laf-intel.md)
+ * A different technique is to instrument the target so that any compare values
+   in the target are sent to afl++ which then tries to put this value into the
+   fuzzing data at different locations. This technique is very fast and good -
+   if the target does not transform input data before comparison. Therefore
+   technique is called `input to state` or `redqueen`.
+   If you want to use this technique, then you have to compile the target
+   twice, once specifically with/for this mode.
+   You can read more about this in [llvm_mode/README.cmplog.md](llvm_mode/README.cmplog.md)
+
+If you use afl-clang-fast, afl-clang-lto or afl-gcc-fast you have the option to
+selectivly only instrument parts of the target that you are interested in:
+
+ * To instrument only those parts of the target that you are interested in
+   create a file with all the filenames of the source code that should be
+   instrumented.
+   For afl-clang-lto and afl-gcc-fast - or afl-clang-fast if either the clang
+   version is < 7 or the CLASSIC instrumentation is used - just put one
+   filename per line, no directory information necessary, and set
+   `export AFL_LLVM_INSTRUMENT_FILE=yourfile.txt`
+   see [llvm_mode/README.instrument_file.md](llvm_mode/README.instrument_file.md)
+   For afl-clang-fast > 6.0 or if PCGUARD instrumentation is used then use the
+   llvm sancov allow-list feature: [http://clang.llvm.org/docs/SanitizerCoverage.html](http://clang.llvm.org/docs/SanitizerCoverage.html)
+
+There are many more options and modes available however these are most of the
+time less effective. See:
+ * [llvm_mode/README.ctx.md](llvm_mode/README.ctx.md)
+ * [llvm_mode/README.ngram.md](llvm_mode/README.ngram.md)
+ * [llvm_mode/README.instrim.md](llvm_mode/README.instrim.md)
+ * [llvm_mode/README.neverzero.md](llvm_mode/README.neverzero.md)
+
+#### c) Modify the target
+
+If the target has features that makes fuzzing more difficult, e.g.
+checksums, HMAC etc. then modify the source code so that this is
+removed.
+This can even be done for productional source code be eliminating
+these checks within this specific defines:
+
+```
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+  // say that the checksum or HMAC was fine - or whatever is required
+  // to eliminate the need for the fuzzer to guess the right checksum
+  return 0;
+#endif
+```
+
+#### d) Instrument the target
+
+In this step the target source code is compiled so that it can be fuzzed.
+
+Basically you have to tell the target build system that the selected afl++
+compiler is used. Also - if possible - you should always configure the
+build system that the target is compiled statically and not dynamically.
+How to do this is described below.
+
+Then build the target. (Usually with `make`)
+
+##### configure
+
+For `configure` build systems this is usually done by:
+`CC=afl-clang-fast CXX=afl-clang-fast++ ./configure --disable-shared`
+
+Note that if you using the (better) afl-clang-lto compiler you also have to
+AR to llvm-ar[-VERSION] and RANLIB to llvm-ranlib[-VERSION] - as it is
+described in [llvm/README.lto.md](llvm/README.lto.md)
+
+##### cmake
+
+For `configure` build systems this is usually done by:
+`mkdir build; cd build; CC=afl-clang-fast CXX=afl-clang-fast++ cmake ..`
+
+Note that if you using the (better) afl-clang-lto compiler you also have to
+AR to llvm-ar[-VERSION] and RANLIB to llvm-ranlib[-VERSION] - as it is
+described in [llvm/README.lto.md](llvm/README.lto.md)
+
+##### other build systems or if configure/cmake didn't work
+
+Sometimes cmake and configure do not pick up the afl compiler, or the ranlib/ar
+that is needed - because this was just not foreseen by the developer of the
+target. Or they have non-standard options. Figure out if there is a 
+non-standard way to set this, otherwise set the build normally and edit the
+generated build environment afterwards by hand to point to the right compiler
+(and/or ranlib and ar).
+
+#### d) Better instrumentation
+
+If you just fuzz a target program as-is you are wasting a great opportunity for
+much more fuzzing speed.
+
+This requires the usage of afl-clang-lto or afl-clang-fast
+
+This is the so-called `persistent mode`, which is much, much faster but
+requires that you code a source file that is specifically calling the target
+functions that you want to fuzz, plus a few specific afl++ functions around
+it. See [llvm_mode/README.persistent_mode.md](llvm_mode/README.persistent_mode.md) for details.
+
+Basically if you do not fuzz a target in persistent mode then you are just
+doing it for a hobby and not professionally :-)
+
+### 2. Preparing the fuzzing
+
+As you fuzz the target with mutated input, having as diverse inputs for the
+target as possible improves the efficiency a lot.
+
+#### a) Collect inputs
+Try to gather valid inputs for the target from wherever you can. E.g. if it
+the PNG picture format try to find as many png files as possible, e.g. from
+reported bugs, test suites, random downloads from the internet, unit test
+case data - from all kind of PNG software.
+
+If the input is not known files, you can also modify a target program to write
+away normal data it receives and processes to a file and use these.
+
+#### b) Making the input corpus unique
+
+Use the afl++ tool `afl-cmin` to remove inputs from the corpus that do not
+use a different paths in the target.
+Put all files from step a) into one directory, e.g. INPUTS.
+
+Put all the files from step a)
+
+If the target program is to be called by fuzzing as `bin/target -d INPUTFILE`
+the run afl-cmin like this:
+`afl-cmin -i INPUTS -o INPUTS_UNIQUE -- bin/target -d @@`
+Note that the INPUTFILE that the target program would read has to be set as `@@`.
+
+If the target reads from stdin instead, just omit  the `@@` as this is the
+default.
+
+#### b) Minimizing all corpus files
+
+The shorter the input files are so that they still traverse the same path
+within the target, the better the fuzzing will be. This is done with `afl-tmin`
+however it is a long processes as this has to be done for every file:
+
+```
+mkdir input
+cd INPUTS_UNIQUE
+for i in *; do
+  afl-tmin -i "$i" -o "../input/$i" -- bin/target -d @@
+done
+```
+
+This can also be parallelized, e.g. with `parallel`
+
+#### c) done!
+
+The INPUTS_UNIQUE/ directory from step a) - or even better if you minimized the
+corpus in step b) then the files in input/ is then the input corpus directory
+to be used in fuzzing! :-)
+
+### Fuzzing the target
+
+In this final step we fuzz the target.
+There are not that many useful options to run the target - unless you want to
+use many CPU cores for the fuzzing, which will make the fuzzing much more useful.
+
+If you just use one CPU for fuzzing, then you are fuzzing just for fun and not
+seriously :-)
+
+#### a) running afl-fuzz
+
+Before to do even a test run of afl-fuzz execute `sudo afl-system-config` (on
+the host if you execute afl-fuzz in a docker container). This reconfigured the
+system for optimal speed - which afl-fuzz checks and bails otherwise.
+Set `export AFL_SKIP_CPUFREQ=1` for afl-fuzz to skip this if you cannot run
+afl-system-config with root privileges on the host for whatever reason.
+
+If you have an input corpus from step 2 then specify this directory with the `-i`
+option. Otherwise create a new directory and create a file with any content
+in there.
+
+If you do not want anything special, the defaults are already the usual best,
+hence all you need (from the example in 2a):
+`afl-fuzz -i input -o output -- bin/target -d @@`
+Note that the directory specified with -o will be created if it does not exist.
+
+If you need to stop and re-start the fuzzing, use the same command line option
+and switch the input directory with a dash (`-`):
+`afl-fuzz -i - -o output -- bin/target -d @@`
+
+Adding a dictionary helpful. See the [dictionaries/](dictionaries/) if
+something is already included for your data format, and tell afl-fuzz to load
+that dictionary by adding `-x dicationaries/FORMAT.dict`. With afl-clang-lto
+you have an autodictionary generation for which you need to do nothing except
+to use afl-clang-lto as the compiler. You also have the option to generate
+a dictionary yourself, see [libtokencap/README.md](libtokencap/README.md)
+
+afl-fuzz never stops fuzzing. To terminate afl++ simply press Control-C.
+
+When you start afl-fuzz you will see a user interface that shows what the status
+is:
+![docs/screenshot.png](docs/screenshot.png)
+All the entries are explained in [docs/status_screen.md](docs/status_screen.md)
+
+#### b) Using multiple cores
+
+If you want to seriously fuzz then use as many cores as possible to fuzz your
+target.
+
+On the same machine - due to the nature how afl++ works - there is a maximum
+number of CPU cores that are useful, more and the overall performance degrades
+instead. This value depends on the target and the limit is between 24 and 64
+cores per machine.
+
+There should be one main fuzzer (`-M main` option) and as many secondary
+fuzzers (eg `-S variant1`) as you cores that you use.
+Every -M/-S entry needs a unique name (that can be whatever), however the same
+-o output directory location has to be used for all.
+
+For every secondary there should be a variation, e.g.:
+ * one should fuzz the target that was compiled differently: with sanitizers
+   activated (`export AFL_USE_ASAN=1 ; export AFL_USE_UBSAN=1 ;
+   export AFL_USE_CFISAN=1 ; `
+ * one should fuzz the target with CMPLOG/redqueen (see above)
+ * At 1-2 should fuzz a target compiled with laf-intel/COMPCOV (see above).
+
+All other secondaries should be:
+ * 1/2 with MOpt option enabled: `-L 0`
+ * run with a different power schedule, available are:
+   `explore (default), fast, coe, lin, quad, exploit, mmopt, rare, seek`
+   which you can set with e.g. `-p seek`
+
+You can also use different fuzzers.
+If you are afl-spinoffs or afl conforming, then just use the same -o directory
+and give it a unique `-S` name.
+Examples are e.g.:
+ * [Angora](https://github.com/AngoraFuzzer/Angora)
+ * [Untracer](https://github.com/FoRTE-Research/UnTracer-AFL)
+ * [AFLsmart](https://github.com/aflsmart/aflsmart)
+ * [FairFuzz](https://github.com/carolemieux/afl-rb)
+ * [Neuzz](https://github.com/Dongdongshe/neuzz)
+A long list can be found at [https://github.com/Microsvuln/Awesome-AFL](https://github.com/Microsvuln/Awesome-AFL)
+
+However you can also sync afl++ with honggfuzz, libfuzzer, entropic, etc.
+Just show the main fuzzer (-M) with the `-F` option where the queue
+directory of these other fuzzers are, e.g. `-F /src/target/honggfuzz`
+
+#### c) The status of the fuzz campaign
+
+afl++ comes with the `afl-whatsup` script to show the status of fuzzing
+campaign.
+
+Just supply the directory that afl-fuzz is given with the -o option and
+you will see a detailed status of every fuzzer in that campaign plus
+a summary.
+
+To have only the summary use the `-s` switch e.g.: `afl-whatsup -s output/`
+
+#### d) Checking the coverage of the fuzzing
+
+The `paths found` value is a bad indicator how good the coverage is.
+It is better to check out the exact lines of code that have been reached -
+and which have not been found so far.
+
+An "easy" helper script for this is [afl-cov](https://github.com/vanhauser-thc/afl-cov),
+just follow the README of that seperate project.
+
+If you see that an important area or a feature has not been covered so far then
+try to find an input that is able to reach that and start a new secondary in
+that fuzzing campaign with that seed as input, let it run for a few minutes,
+then terminate it. The main node will pick it up and make it available to the
+other secondary nodes over time. Set `export AFL_NO_AFFINITY=1` if you have no
+free core.
+
+#### e) How long to fuzz a target?
+
+This is a difficult question.
+Basically if no new path is found for a long time (e.g. for a day or a week)
+then you can expect that your fuzzing won't be fruitful anymore.
+However often this just means that you should switch out secondaries for
+others, e.g. custom mutator modules, sync to very different fuzzers, etc.
+
+### The End
+
+This is basically all you need to know to professionally run fuzzing campaigns.
+If you want to know more, the rest of this README and the tons of texts in
+[docs/](docs/) will have you covered.
+
+Note that there are also a lot of tools out there that help fuzzing with afl++
+(some might be deprecated or unsupported):
+
+Minimization of test cases:
+ * [afl-pytmin](https://github.com/ilsani/afl-pytmin) - a wrapper for afl-tmin that tries to speed up the process of the minimization of test case by using many CPU cores.
+ * [afl-ddmin-mod](https://github.com/MarkusTeufelberger/afl-ddmin-mod) - a variation of afl-tmin based on the ddmin algorithm. 
+ * [halfempty](https://github.com/googleprojectzero/halfempty) -  is a fast utility for minimizing test cases by Tavis Ormandy based on parallelization. 
+
+Distributed execution:
+ * [disfuzz-afl](https://github.com/MartijnB/disfuzz-afl) - distributed fuzzing for AFL.
+ * [AFLDFF](https://github.com/quantumvm/AFLDFF) - AFL distributed fuzzing framework.
+ * [afl-launch](https://github.com/bnagy/afl-launch) - a tool for the execution of many AFL instances.
+ * [afl-mothership](https://github.com/afl-mothership/afl-mothership) - management and execution of many synchronized AFL fuzzers on AWS cloud.
+ * [afl-in-the-cloud](https://github.com/abhisek/afl-in-the-cloud) - another script for running AFL in AWS.
+
+Deployment, management, monitoring, reporting
+ * [afl-other-arch](https://github.com/shellphish/afl-other-arch) - is a set of patches and scripts for easily adding support for various non-x86 architectures for AFL.
+ * [afl-trivia](https://github.com/bnagy/afl-trivia) - a few small scripts to simplify the management of AFL.
+ * [afl-monitor](https://github.com/reflare/afl-monitor) - a script for monitoring AFL.
+ * [afl-manager](https://github.com/zx1340/afl-manager) - a web server on Python for managing multi-afl.
+ * [afl-remote](https://github.com/block8437/afl-remote) - a web server for the remote management of AFL instances.
+
+Crash processing
+ * [afl-utils](https://gitlab.com/rc0r/afl-utils) - a set of utilities for automatic processing/analysis of crashes and reducing the number of test cases.
+ * [afl-crash-analyzer](https://github.com/floyd-fuh/afl-crash-analyzer) - another crash analyzer for AFL.
+ * [fuzzer-utils](https://github.com/ThePatrickStar/fuzzer-utils) - a set of scripts for the analysis of results.
+ * [atriage](https://github.com/Ayrx/atriage) - a simple triage tool.
+ * [afl-kit](https://github.com/kcwu/afl-kit) - afl-cmin on Python.
+ * [AFLize](https://github.com/d33tah/aflize) - a tool that automatically generates builds of debian packages suitable for AFL.
+ * [afl-fid](https://github.com/FoRTE-Research/afl-fid) - a set of tools for working with input data.
+
+## Fuzzing binary-only targets
+
+When source code is *NOT* available, afl++ offers various support for fast,
+on-the-fly instrumentation of black-box binaries. 
+
+### QEMU
+
+For linux programs and it's libraries this is accomplished with a version of
+QEMU running in the lesser-known "user space emulation" mode.
+QEMU is a project separate from AFL, but you can conveniently build the
+feature by doing:
+```shell
+cd qemu_mode
+./build_qemu_support.sh
+```
+For additional instructions and caveats, see [qemu_mode/README.md](qemu_mode/README.md).
+If possible you should use the persistent mode, see [qemu_mode/README.persistent.md](qemu_mode/README.persistent.md).
+The mode is approximately 2-5x slower than compile-time instrumentation, and is
+less conducive to parallelization.
+
+If [afl-dyninst](https://github.com/vanhauser-thc/afl-dyninst) works for
+your binary, then you can use afl-fuzz normally and it will have twice
+the speed compared to qemu_mode (but slower than persistent mode).
+
+### Unicorn
+
+For non-Linux binaries you can use afl++'s unicorn mode which can emulate
+anything you want - for the price of speed and the user writing scripts.
+See [unicorn_mode](unicorn_mode/README.md).
+
+It can be easily build by:
+```shell
+cd unicorn_mode
+./build_unicorn_support.sh
+```
+
+### Shared libraries
+
+If the goal is to fuzz a dynamic library then there are two options available.
+For both you need to write a small hardness that loads and calls the library.
+Faster is the frida solution: [examples/afl_frida/README.md](examples/afl_frida/README.md)
+
+Another, less precise and slower option is using ptrace with debugger interrupt
+instrumentation: [examples/afl_untracer/README.md](examples/afl_untracer/README.md)
+
+### More
+
+A more comprehensive description of these and other options can be found in
+[docs/binaryonly_fuzzing.md](docs/binaryonly_fuzzing.md)
+
 ## Challenges of guided fuzzing
 
 Fuzzing is one of the most powerful and proven strategies for identifying
@@ -262,7 +710,6 @@ closed-source tools.
 The fuzzer is thoroughly tested to deliver out-of-the-box performance far
 superior to blind fuzzing or coverage-only tools.
 
-
 ## Instrumenting programs for use with AFL
 
 PLEASE NOTE: llvm_mode compilation with afl-clang-fast/afl-clang-fast++
@@ -318,52 +765,6 @@ simple memory bugs. Libdislocator, a helper library included with AFL (see
 PS. ASAN users are advised to review [docs/notes_for_asan.md](docs/notes_for_asan.md)
 file for important caveats.
 
-
-## Instrumenting binary-only apps
-
-When source code is *NOT* available, the fuzzer offers experimental support for
-fast, on-the-fly instrumentation of black-box binaries. This is accomplished
-with a version of QEMU running in the lesser-known "user space emulation" mode.
-
-QEMU is a project separate from AFL, but you can conveniently build the
-feature by doing:
-
-```shell
-cd qemu_mode
-./build_qemu_support.sh
-```
-
-For additional instructions and caveats, see [qemu_mode/README.md](qemu_mode/README.md).
-
-If possible you should use the persistent mode, see [qemu_mode/README.persistent.md](qemu_mode/README.persistent.md).
-
-The mode is approximately 2-5x slower than compile-time instrumentation, is
-less conducive to parallelization, and may have some other quirks.
-
-If [afl-dyninst](https://github.com/vanhauser-thc/afl-dyninst) works for
-your binary, then you can use afl-fuzz normally and it will have twice
-the speed compared to qemu_mode.
-
-A more comprehensive description of these and other options can be found in
-[docs/binaryonly_fuzzing.md](docs/binaryonly_fuzzing.md)
-
-## Good examples and writeups
-
-Here are some good writeups to show how to effectively use AFL++:
-
- * [https://aflplus.plus/docs/tutorials/libxml2_tutorial/](https://aflplus.plus/docs/tutorials/libxml2_tutorial/)
- * [https://bananamafia.dev/post/gb-fuzz/](https://bananamafia.dev/post/gb-fuzz/)
- * [https://securitylab.github.com/research/fuzzing-challenges-solutions-1](https://securitylab.github.com/research/fuzzing-challenges-solutions-1)
- * [https://securitylab.github.com/research/fuzzing-sockets-FTP](https://securitylab.github.com/research/fuzzing-sockets-FTP)
-
-If you are interested in fuzzing structured data (where you define what the
-structure is), these links have you covered:
- * Superion for afl++: [https://github.com/adrian-rt/superion-mutator](https://github.com/adrian-rt/superion-mutator)
- * libprotobuf raw: [https://github.com/bruce30262/libprotobuf-mutator_fuzzing_learning/tree/master/4_libprotobuf_aflpp_custom_mutator](https://github.com/bruce30262/libprotobuf-mutator_fuzzing_learning/tree/master/4_libprotobuf_aflpp_custom_mutator)
- * libprotobuf for old afl++ API: [https://github.com/thebabush/afl-libprotobuf-mutator](https://github.com/thebabush/afl-libprotobuf-mutator)
-
-If you find other good ones, please send them to us :-)
-
 ## Power schedules
 
 The power schedules were copied from Marcel Böhme's AFLfast implementation and
diff --git a/README_new.md b/README_new.md
deleted file mode 100644
index 9b8c1014..00000000
--- a/README_new.md
+++ /dev/null
@@ -1,1065 +0,0 @@
-# american fuzzy lop plus plus (afl++)
-
-  <img align="right" src="https://raw.githubusercontent.com/andreafioraldi/AFLplusplus-website/master/static/logo_256x256.png" alt="AFL++ Logo">
-
-  ![Travis State](https://api.travis-ci.com/AFLplusplus/AFLplusplus.svg?branch=stable)
-
-  Release Version: [2.66c](https://github.com/AFLplusplus/AFLplusplus/releases)
-
-  Github Version: 2.66d
-
-  Repository: [https://github.com/AFLplusplus/AFLplusplus](https://github.com/AFLplusplus/AFLplusplus)
-
-  afl++ is maintained by:
-
-  * Marc "van Hauser" Heuse <mh@mh-sec.de>,
-  * Heiko "hexcoder-" Eißfeldt <heiko.eissfeldt@hexco.de>,
-  * Andrea Fioraldi <andreafioraldi@gmail.com> and
-  * Dominik Maier <mail@dmnk.co>.
-
-  Originally developed by Michal "lcamtuf" Zalewski.
-
-  afl++ is superiour to Google's afl in any way - more speed, more and better
-  mutations, more and better instrumentation, etc. etc.
-
-## Contents
-
-  1. [Features](#important-features-of-afl)
-  2. [How to compile and install afl++](#building-and-installing-afl)
-  3. [How to fuzz a target](#how-to-fuzz-with-afl)
-  4. [Fuzzing binary-only targets](#fuzzing-binary-only-targets)
-  5. [Good examples and writeups of afl++ usages](#good-examples-and-writeups)
-  6. [Branches](#branches)
-  7. [Want to help?](#help-wanted)
-  8. [Detailed help and description of afl++](#challenges-of-guided-fuzzing)
-
-## Important features of afl++
-
-  afl++ supports llvm up to version 12, very fast binary fuzzing with QEMU 3.1
-  with laf-intel and redqueen, unicorn mode, gcc plugin, full *BSD, Solaris and
-  Android support and much, much, much more.
-
-  | Feature/Instrumentation | afl-gcc | llvm_mode | gcc_plugin | qemu_mode        | unicorn_mode |
-  | ----------------------- |:-------:|:---------:|:----------:|:----------------:|:------------:|
-  | NeverZero               |    x    |     x(1)  |      (2)   |         x        |       x      |
-  | Persistent mode         |         |     x     |     x      | x86[_64]/arm[64] |       x      |
-  | LAF-Intel / CompCov     |         |     x     |            | x86[_64]/arm[64] | x86[_64]/arm |
-  | CmpLog                  |         |     x     |            | x86[_64]/arm[64] |              |
-  | Instrument file list    |         |     x     |     x      |        (x)(3)    |              |
-  | Non-colliding coverage  |         |     x(4)  |            |        (x)(5)    |              |
-  | InsTrim                 |         |     x     |            |                  |              |
-  | Ngram prev_loc coverage |         |     x(6)  |            |                  |              |
-  | Context coverage        |         |     x     |            |                  |              |
-  | Auto dictionary         |         |     x(7)  |            |                  |              |
-  | Snapshot LKM support    |         |     x     |            |        (x)(5)    |              |
-
-  neverZero:
-
-  (1) default for LLVM >= 9.0, env var for older version due an efficiency bug in llvm <= 8
-
-  (2) GCC creates non-performant code, hence it is disabled in gcc_plugin
-
-  (3) partially via AFL_CODE_START/AFL_CODE_END
-
-  (4) with pcguard mode and LTO mode for LLVM >= 11
-
-  (5) upcoming, development in the branch
-
-  (6) not compatible with LTO instrumentation and needs at least LLVM >= 4.1
-  
-  (7) only in LTO mode with LLVM >= 11
-
-  Among others, the following features and patches have been integrated:
-
-  * NeverZero patch for afl-gcc, llvm_mode, qemu_mode and unicorn_mode which prevents a wrapping map value to zero, increases coverage
-  
-  * Persistent mode and deferred forkserver for qemu_mode
-  
-  * Unicorn mode which allows fuzzing of binaries from completely different platforms (integration provided by domenukk)
-
-  * The new CmpLog instrumentation for LLVM and QEMU inspired by [Redqueen](https://www.syssec.ruhr-uni-bochum.de/media/emma/veroeffentlichungen/2018/12/17/NDSS19-Redqueen.pdf)
-
-  * Win32 PE binary-only fuzzing with QEMU and Wine
-
-  * AFLfast's power schedules by Marcel Böhme: [https://github.com/mboehme/aflfast](https://github.com/mboehme/aflfast)
-
-  * The MOpt mutator: [https://github.com/puppet-meteor/MOpt-AFL](https://github.com/puppet-meteor/MOpt-AFL)
-
-  * LLVM mode Ngram coverage by Adrian Herrera [https://github.com/adrianherrera/afl-ngram-pass](https://github.com/adrianherrera/afl-ngram-pass)
-
-  * InsTrim, an effective CFG llvm_mode instrumentation implementation for large targets: [https://github.com/csienslab/instrim](https://github.com/csienslab/instrim)
-
-  * C. Holler's afl-fuzz Python mutator module and llvm_mode instrument file support: [https://github.com/choller/afl](https://github.com/choller/afl)
-
-  * Custom mutator by a library (instead of Python) by kyakdan
-
-  * LAF-Intel/CompCov support for llvm_mode, qemu_mode and unicorn_mode (with enhanced capabilities)
-
-  * Radamsa and hongfuzz mutators (as custom mutators).
-
-  * QBDI mode to fuzz android native libraries via QBDI framework
-
-  A more thorough list is available in the [PATCHES](docs/PATCHES.md) file.
-
-  So all in all this is the best-of afl that is currently out there :-)
-
-  For new versions and additional information, check out:
-  [https://github.com/AFLplusplus/AFLplusplus](https://github.com/AFLplusplus/AFLplusplus)
-
-  To compare notes with other users or get notified about major new features,
-  send a mail to <afl-users+subscribe@googlegroups.com>.
-
-  See [docs/QuickStartGuide.md](docs/QuickStartGuide.md) if you don't have time to
-  read this file.
-
-## Branches
-
-  The following branches exist:
-
-  * [master/trunk](https://github.com/AFLplusplus/AFLplusplus/) : stable state of afl++ - it is synced from dev from time to
-    time when we are satisfied with it's stability
-  * [dev](https://github.com/AFLplusplus/AFLplusplus/tree/dev) : development state of afl++ - bleeding edge and you might catch a
-    checkout which does not compile or has a bug. *We only accept PRs in dev!!*
-  * (any other) : experimental branches to work on specific features or testing
-    new functionality or changes.
-
-  For releases, please see the [Releases](https://github.com/AFLplusplus/AFLplusplus/releases) tab.
-
-## Help wanted
-
-We are happy to be part of [Google Summer of Code 2020](https://summerofcode.withgoogle.com/organizations/5100744400699392/)! :-)
-
-We have several ideas we would like to see in AFL++ to make it even better.
-However, we already work on so many things that we do not have the time for
-all the big ideas.
-
-This can be your way to support and contribute to AFL++ - extend it to
-something cool.
-
-We have an idea list in [docs/ideas.md](docs/ideas.md).
-
-For everyone who wants to contribute (and send pull requests) please read
-[CONTRIBUTING.md](CONTRIBUTING.md) before your submit.
-
-## Building and installing afl++
-
-An easy way to install afl++ with everything compiled is available via docker:
-You can use the [Dockerfile](Dockerfile) (which has gcc-10 and clang-11 -
-hence afl-clang-lto is available!) or just pull directly from the docker hub:
-```shell
-docker pull aflplusplus/aflplusplus
-docker run -ti -v /location/of/your/target:/src aflplusplus/aflplusplus
-```
-This image is automatically generated when a push to master happens.
-You will find your target source code in /src in the container.
-
-If you want to build afl++ yourself you have many options.
-The easiest is to build and install everything:
-
-```shell
-sudo apt install build-essential libtool-bin python3-dev automake flex bison libglib2.0-dev libpixman-1-dev clang python3-setuptools llvm
-make distrib
-sudo make install
-```
-It is recommended to install the newest available gcc, clang and llvm-dev
-possible in your distribution!
-
-Note that "make distrib" also builds llvm_mode, qemu_mode, unicorn_mode and
-more. If you just want plain afl then do "make all", however compiling and
-using at least llvm_mode is highly recommended for much better results -
-hence in this case
-
-```shell
-make source-only
-```
-is what you should choose.
-
-These build targets exist:
-
-* all: just the main afl++ binaries
-* binary-only: everything for binary-only fuzzing: qemu_mode, unicorn_mode, libdislocator, libtokencap
-* source-only: everything for source code fuzzing: llvm_mode, libdislocator, libtokencap
-* distrib: everything (for both binary-only and source code fuzzing)
-* man: creates simple man pages from the help option of the programs
-* install: installs everything you have compiled with the build options above
-* clean: cleans everything compiled, not downloads (unless not on a checkout)
-* deepclean: cleans everything including downloads
-* code-format: format the code, do this before you commit and send a PR please!
-* tests: runs test cases to ensure that all features are still working as they should
-* unit: perform unit tests (based on cmocka)
-* help: shows these build options
-
-[Unless you are on Mac OS X](https://developer.apple.com/library/archive/qa/qa1118/_index.html) you can also build statically linked versions of the 
-afl++ binaries by passing the STATIC=1 argument to make:
-
-```shell
-make all STATIC=1
-```
-
-These build options exist:
-
-* STATIC - compile AFL++ static
-* ASAN_BUILD - compiles with memory sanitizer for debug purposes
-* PROFILING - compile with profiling information (gprof)
-* NO_PYTHON - disable python support
-* AFL_NO_X86 - if compiling on non-intel/amd platforms
-* LLVM_CONFIG - if your distro doesn't use the standard name for llvm-config (e.g. Debian)
-
-e.g.: make ASAN_BUILD=1
-
-## Good examples and writeups
-
-Here are some good writeups to show how to effectively use AFL++:
-
- * [https://aflplus.plus/docs/tutorials/libxml2_tutorial/](https://aflplus.plus/docs/tutorials/libxml2_tutorial/)
- * [https://bananamafia.dev/post/gb-fuzz/](https://bananamafia.dev/post/gb-fuzz/)
- * [https://securitylab.github.com/research/fuzzing-challenges-solutions-1](https://securitylab.github.com/research/fuzzing-challenges-solutions-1)
- * [https://securitylab.github.com/research/fuzzing-sockets-FTP](https://securitylab.github.com/research/fuzzing-sockets-FTP)
-
-If you are interested in fuzzing structured data (where you define what the
-structure is), these links have you covered:
- * Superion for afl++: [https://github.com/adrian-rt/superion-mutator](https://github.com/adrian-rt/superion-mutator)
- * libprotobuf raw: [https://github.com/bruce30262/libprotobuf-mutator_fuzzing_learning/tree/master/4_libprotobuf_aflpp_custom_mutator](https://github.com/bruce30262/libprotobuf-mutator_fuzzing_learning/tree/master/4_libprotobuf_aflpp_custom_mutator)
- * libprotobuf for old afl++ API: [https://github.com/thebabush/afl-libprotobuf-mutator](https://github.com/thebabush/afl-libprotobuf-mutator)
-
-If you find other good ones, please send them to us :-)
-
-## How to fuzz with afl++
-
-The following describes how to fuzz with a target if source code is available.
-If you have a binary-only target please skip to [#Instrumenting binary-only apps](#Instrumenting binary-only apps)
-
-Fuzzing source code is a two step process.
-
-1. compile the target with a special compiler that prepares the target to be
-   fuzzed efficiently. This step is called "instrumenting a target".
-2. Prepare the fuzzing by selecting and optimizing the input corpus for the
-   target.
-3. perform the fuzzing of the target by randomly mutating input and assessing
-   if a generated input was processed in a new path in the target binary
-
-### 1. Instrumenting that target
-
-#### a) Selecting the best afl++ compiler for instrumenting the target
-
-afl++ comes with different compilers and instrumentation options.
-The following evaluation flow will help you to select the best possible.
-
-It is highly recommended to have the newest llvm version possible installed,
-anything below 9 is not recommended.
-
-```
-+--------------------------------+
-| clang/clang++ 11+ is available | --> use afl-clang-lto and afl-clang-lto++
-+--------------------------------+     see [llvm/README.lto.md](llvm/README.lto.md)
-    |
-    | if not, or if the target fails with with afl-clang-lto/++
-    |
-    v
-+---------------------------------+
-| clang/clang++ 3.3+ is available | --> use afl-clang-fast and afl-clang-fast++
-+---------------------------------+     see [llvm/README.md](llvm/README.md)
-    |
-    | if not, or if the target fails with afl-clang-fast/++
-    |
-    v
- +--------------------------------+
- | if you want to instrument only | -> use afl-gcc-fast and afl-gcc-fast++
- | parts of the target            |    see [gcc_plugin/README.md](gcc_plugin/README.md) and
- +--------------------------------+    [gcc_plugin/README.instrument_file.md](gcc_plugin/README.instrument_file.md)
-    |
-    | if not, or if you do not have a gcc with plugin support
-    |
-    v
-   use afl-gcc and afl-g++
-```
-
-#### b) Selecting instrumentation options
-
-The following options are available when you instrument with afl-clang-fast or
-afl-clang-lto:
-
- * Splitting integer, string, float and switch compares so afl++ can easier
-   solve these. This is an important option if you do not have a very good
-   good and large input corpus. This technique is called laf-intel or COMPCOV.
-   To use this set the following environment variable before compiling the
-   target: `export AFL_LLVM_LAF_ALL=1`
-   You can read more about this in [llvm/README.laf-intel.md](llvm/README.laf-intel.md)
- * A different technique is to instrument the target so that any compare values
-   in the target are sent to afl++ which then tries to put this value into the
-   fuzzing data at different locations. This technique is very fast and good -
-   if the target does not transform input data before comparison. Therefore
-   technique is called `input to state` or `redqueen`.
-   If you want to use this technique, then you have to compile the target
-   twice, once specifically with/for this mode.
-   You can read more about this in [llvm_mode/README.cmplog.md](llvm_mode/README.cmplog.md)
-
-If you use afl-clang-fast, afl-clang-lto or afl-gcc-fast you have the option to
-selectivly only instrument parts of the target that you are interested in:
-
- * To instrument only those parts of the target that you are interested in
-   create a file with all the filenames of the source code that should be
-   instrumented.
-   For afl-clang-lto and afl-gcc-fast - or afl-clang-fast if either the clang
-   version is < 7 or the CLASSIC instrumentation is used - just put one
-   filename per line, no directory information necessary, and set
-   `export AFL_LLVM_INSTRUMENT_FILE=yourfile.txt`
-   see [llvm_mode/README.instrument_file.md](llvm_mode/README.instrument_file.md)
-   For afl-clang-fast > 6.0 or if PCGUARD instrumentation is used then use the
-   llvm sancov allow-list feature: [http://clang.llvm.org/docs/SanitizerCoverage.html](http://clang.llvm.org/docs/SanitizerCoverage.html)
-
-There are many more options and modes available however these are most of the
-time less effective. See:
- * [llvm_mode/README.ctx.md](llvm_mode/README.ctx.md)
- * [llvm_mode/README.ngram.md](llvm_mode/README.ngram.md)
- * [llvm_mode/README.instrim.md](llvm_mode/README.instrim.md)
- * [llvm_mode/README.neverzero.md](llvm_mode/README.neverzero.md)
-
-#### c) Modify the target
-
-If the target has features that makes fuzzing more difficult, e.g.
-checksums, HMAC etc. then modify the source code so that this is
-removed.
-This can even be done for productional source code be eliminating
-these checks within this specific defines:
-
-```
-#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
-  // say that the checksum or HMAC was fine - or whatever is required
-  // to eliminate the need for the fuzzer to guess the right checksum
-  return 0;
-#endif
-```
-
-#### d) Instrument the target
-
-In this step the target source code is compiled so that it can be fuzzed.
-
-Basically you have to tell the target build system that the selected afl++
-compiler is used. Also - if possible - you should always configure the
-build system that the target is compiled statically and not dynamically.
-How to do this is described below.
-
-Then build the target. (Usually with `make`)
-
-##### configure
-
-For `configure` build systems this is usually done by:
-`CC=afl-clang-fast CXX=afl-clang-fast++ ./configure --disable-shared`
-
-Note that if you using the (better) afl-clang-lto compiler you also have to
-AR to llvm-ar[-VERSION] and RANLIB to llvm-ranlib[-VERSION] - as it is
-described in [llvm/README.lto.md](llvm/README.lto.md)
-
-##### cmake
-
-For `configure` build systems this is usually done by:
-`mkdir build; cd build; CC=afl-clang-fast CXX=afl-clang-fast++ cmake ..`
-
-Note that if you using the (better) afl-clang-lto compiler you also have to
-AR to llvm-ar[-VERSION] and RANLIB to llvm-ranlib[-VERSION] - as it is
-described in [llvm/README.lto.md](llvm/README.lto.md)
-
-##### other build systems or if configure/cmake didn't work
-
-Sometimes cmake and configure do not pick up the afl compiler, or the ranlib/ar
-that is needed - because this was just not foreseen by the developer of the
-target. Or they have non-standard options. Figure out if there is a 
-non-standard way to set this, otherwise set the build normally and edit the
-generated build environment afterwards by hand to point to the right compiler
-(and/or ranlib and ar).
-
-#### d) Better instrumentation
-
-If you just fuzz a target program as-is you are wasting a great opportunity for
-much more fuzzing speed.
-
-This requires the usage of afl-clang-lto or afl-clang-fast
-
-This is the so-called `persistent mode`, which is much, much faster but
-requires that you code a source file that is specifically calling the target
-functions that you want to fuzz, plus a few specific afl++ functions around
-it. See [llvm_mode/README.persistent_mode.md](llvm_mode/README.persistent_mode.md) for details.
-
-Basically if you do not fuzz a target in persistent mode then you are just
-doing it for a hobby and not professionally :-)
-
-### 2. Preparing the fuzzing
-
-As you fuzz the target with mutated input, having as diverse inputs for the
-target as possible improves the efficiency a lot.
-
-#### a) Collect inputs
-Try to gather valid inputs for the target from wherever you can. E.g. if it
-the PNG picture format try to find as many png files as possible, e.g. from
-reported bugs, test suites, random downloads from the internet, unit test
-case data - from all kind of PNG software.
-
-If the input is not known files, you can also modify a target program to write
-away normal data it receives and processes to a file and use these.
-
-#### b) Making the input corpus unique
-
-Use the afl++ tool `afl-cmin` to remove inputs from the corpus that do not
-use a different paths in the target.
-Put all files from step a) into one directory, e.g. INPUTS.
-
-Put all the files from step a)
-
-If the target program is to be called by fuzzing as `bin/target -d INPUTFILE`
-the run afl-cmin like this:
-`afl-cmin -i INPUTS -o INPUTS_UNIQUE -- bin/target -d @@`
-Note that the INPUTFILE that the target program would read has to be set as `@@`.
-
-If the target reads from stdin instead, just omit  the `@@` as this is the
-default.
-
-#### b) Minimizing all corpus files
-
-The shorter the input files are so that they still traverse the same path
-within the target, the better the fuzzing will be. This is done with `afl-tmin`
-however it is a long processes as this has to be done for every file:
-
-```
-mkdir input
-cd INPUTS_UNIQUE
-for i in *; do
-  afl-tmin -i "$i" -o "../input/$i" -- bin/target -d @@
-done
-```
-
-This can also be parallelized, e.g. with `parallel`
-
-#### c) done!
-
-The INPUTS_UNIQUE/ directory from step a) - or even better if you minimized the
-corpus in step b) then the files in input/ is then the input corpus directory
-to be used in fuzzing! :-)
-
-### Fuzzing the target
-
-In this final step we fuzz the target.
-There are not that many useful options to run the target - unless you want to
-use many CPU cores for the fuzzing, which will make the fuzzing much more useful.
-
-If you just use one CPU for fuzzing, then you are fuzzing just for fun and not
-seriously :-)
-
-#### a) running afl-fuzz
-
-If you have an input corpus from step 2 then specify this directory with the `-i`
-option. Otherwise create a new directory and create a file with any content
-in there.
-
-If you do not want anything special, the defaults are already the usual best,
-hence all you need (from the example in 2a):
-`afl-fuzz -i input -o output -- bin/target -d @@`
-Note that the directory specified with -o will be created if it does not exist.
-
-If you need to stop and re-start the fuzzing, use the same command line option
-and switch the input directory with a dash (`-`):
-`afl-fuzz -i - -o output -- bin/target -d @@`
-
-afl-fuzz never stops fuzzing. To terminate afl++ simply press Control-C.
-
-When you start afl-fuzz you will see a user interface that shows what the status
-is:
-[docs/screenshot.png](docs/screenshot.png)
-All the entries are explained in [docs/status_screen.md](docs/status_screen.md)
-
-#### b) Using multiple cores
-
-If you want to seriously fuzz then use as many cores as possible to fuzz your
-target.
-
-On the same machine - due to the nature how afl++ works - there is a maximum
-number of CPU cores that are useful, more and the overall performance degrades
-instead. This value depends on the target and the limit is between 24 and 64
-cores per machine.
-
-There should be one main fuzzer (`-M main` option) and as many secondary
-fuzzers (eg `-S variant1`) as you cores that you use.
-Every -M/-S entry needs a unique name (that can be whatever), however the same
--o output directory location has to be used for all.
-
-For every secondary there should be a variation, e.g.:
- * one should fuzz the target that was compiled differently: with sanitizers
-   activated (`export AFL_USE_ASAN=1 ; export AFL_USE_UBSAN=1 ;
-   export AFL_USE_CFISAN=1 ; `
- * one should fuzz the target with CMPLOG/redqueen (see above)
- * At 1-2 should fuzz a target compiled with laf-intel/COMPCOV (see above).
-
-All other secondaries should be:
- * 1/2 with MOpt option enabled: `-L 0`
- * run with a different power schedule, available are:
-   `explore (default), fast, coe, lin, quad, exploit, mmopt, rare, seek`
-   which you can set with e.g. `-p seek`
-
-You can also use different fuzzers.
-If you are afl-spinoffs or afl conforming, then just use the same -o directory
-and give it a unique `-S` name.
-Examples are e.g.:
- * 
- * 
- * 
-
-However you can also sync afl++ with honggfuzz, libfuzzer, entropic, etc.
-Just show the main fuzzer (-M) with the `-F` option where the queue
-directory of these other fuzzers are, e.g. `-F /src/target/honggfuzz`
-
-#### c) How long to fuzz a target?
-
-This is a difficult question.
-Basically if no new path is found for a long time (e.g. for a day or a week)
-then you can expect that your fuzzing won't be fruitful anymore.
-However often this just means that you should switch out secondaries for
-others, e.g. custom mutator modules, sync to very different fuzzers, etc.
-
-### The End
-
-This is basically all you need to know to professionally run fuzzing campaigns.
-If you want to know more, the rest of this README and the tons of texts in
-[docs/](docs/) will have you covered.
-
-## Challenges of guided fuzzing
-
-Fuzzing is one of the most powerful and proven strategies for identifying
-security issues in real-world software; it is responsible for the vast
-majority of remote code execution and privilege escalation bugs found to date
-in security-critical software.
-
-Unfortunately, fuzzing is also relatively shallow; blind, random mutations
-make it very unlikely to reach certain code paths in the tested code, leaving
-some vulnerabilities firmly outside the reach of this technique.
-
-There have been numerous attempts to solve this problem. One of the early
-approaches - pioneered by Tavis Ormandy - is corpus distillation. The method
-relies on coverage signals to select a subset of interesting seeds from a
-massive, high-quality corpus of candidate files, and then fuzz them by
-traditional means. The approach works exceptionally well but requires such
-a corpus to be readily available. In addition, block coverage measurements
-provide only a very simplistic understanding of the program state and are less
-useful for guiding the fuzzing effort in the long haul.
-
-Other, more sophisticated research has focused on techniques such as program
-flow analysis ("concolic execution"), symbolic execution, or static analysis.
-All these methods are extremely promising in experimental settings, but tend
-to suffer from reliability and performance problems in practical uses - and
-currently do not offer a viable alternative to "dumb" fuzzing techniques.
-
-
-## The afl-fuzz approach
-
-American Fuzzy Lop is a brute-force fuzzer coupled with an exceedingly simple
-but rock-solid instrumentation-guided genetic algorithm. It uses a modified
-form of edge coverage to effortlessly pick up subtle, local-scale changes to
-program control flow.
-
-Simplifying a bit, the overall algorithm can be summed up as:
-
-  1) Load user-supplied initial test cases into the queue,
-
-  2) Take the next input file from the queue,
-
-  3) Attempt to trim the test case to the smallest size that doesn't alter
-     the measured behavior of the program,
-
-  4) Repeatedly mutate the file using a balanced and well-researched variety
-     of traditional fuzzing strategies,
-
-  5) If any of the generated mutations resulted in a new state transition
-     recorded by the instrumentation, add mutated output as a new entry in the
-     queue.
-
-  6) Go to 2.
-
-The discovered test cases are also periodically culled to eliminate ones that
-have been obsoleted by newer, higher-coverage finds; and undergo several other
-instrumentation-driven effort minimization steps.
-
-As a side result of the fuzzing process, the tool creates a small,
-self-contained corpus of interesting test cases. These are extremely useful
-for seeding other, labor- or resource-intensive testing regimes - for example,
-for stress-testing browsers, office applications, graphics suites, or
-closed-source tools.
-
-The fuzzer is thoroughly tested to deliver out-of-the-box performance far
-superior to blind fuzzing or coverage-only tools.
-
-
-## Instrumenting programs for use with AFL
-
-PLEASE NOTE: llvm_mode compilation with afl-clang-fast/afl-clang-fast++
-instead of afl-gcc/afl-g++ is much faster and has many cool features.
-See llvm_mode/ - however few code does not compile with llvm.
-We support llvm versions 3.4 to 12.
-
-When source code is available, instrumentation can be injected by a companion
-tool that works as a drop-in replacement for gcc or clang in any standard build
-process for third-party code.
-
-The instrumentation has a fairly modest performance impact; in conjunction with
-other optimizations implemented by afl-fuzz, most programs can be fuzzed as fast
-or even faster than possible with traditional tools.
-
-The correct way to recompile the target program may vary depending on the
-specifics of the build process, but a nearly-universal approach would be:
-
-```shell
-CC=/path/to/afl/afl-gcc ./configure
-make clean all
-```
-
-For C++ programs, you'd would also want to set `CXX=/path/to/afl/afl-g++`.
-
-The clang wrappers (afl-clang and afl-clang++) can be used in the same way;
-clang users may also opt to leverage a higher-performance instrumentation mode,
-as described in [llvm_mode/README.md](llvm_mode/README.md).
-Clang/LLVM has a much better performance and works with LLVM version 3.4 to 12.
-
-Using the LAF Intel performance enhancements are also recommended, see 
-[llvm_mode/README.laf-intel.md](llvm_mode/README.laf-intel.md)
-
-Using partial instrumentation is also recommended, see
-[llvm_mode/README.instrument_file.md](llvm_mode/README.instrument_file.md)
-
-When testing libraries, you need to find or write a simple program that reads
-data from stdin or from a file and passes it to the tested library. In such a
-case, it is essential to link this executable against a static version of the
-instrumented library or to make sure that the correct .so file is loaded at
-runtime (usually by setting `LD_LIBRARY_PATH`). The simplest option is a static
-build, usually possible via:
-
-```shell
-CC=/path/to/afl/afl-gcc ./configure --disable-shared
-```
-
-Setting `AFL_HARDEN=1` when calling 'make' will cause the CC wrapper to
-automatically enable code hardening options that make it easier to detect
-simple memory bugs. Libdislocator, a helper library included with AFL (see
-[libdislocator/README.md](libdislocator/README.md)) can help uncover heap corruption issues, too.
-
-PS. ASAN users are advised to review [docs/notes_for_asan.md](docs/notes_for_asan.md)
-file for important caveats.
-
-
-## Fuzzing binary-only targets
-
-When source code is *NOT* available, the fuzzer offers experimental support for
-fast, on-the-fly instrumentation of black-box binaries. This is accomplished
-with a version of QEMU running in the lesser-known "user space emulation" mode.
-
-QEMU is a project separate from AFL, but you can conveniently build the
-feature by doing:
-
-```shell
-cd qemu_mode
-./build_qemu_support.sh
-```
-
-For additional instructions and caveats, see [qemu_mode/README.md](qemu_mode/README.md).
-
-If possible you should use the persistent mode, see [qemu_mode/README.persistent.md](qemu_mode/README.persistent.md).
-
-The mode is approximately 2-5x slower than compile-time instrumentation, is
-less conducive to parallelization, and may have some other quirks.
-
-If [afl-dyninst](https://github.com/vanhauser-thc/afl-dyninst) works for
-your binary, then you can use afl-fuzz normally and it will have twice
-the speed compared to qemu_mode.
-
-A more comprehensive description of these and other options can be found in
-[docs/binaryonly_fuzzing.md](docs/binaryonly_fuzzing.md)
-
-## Power schedules
-
-The power schedules were copied from Marcel Böhme's AFLfast implementation and
-measure differently which queue entries to prefer and therefore may find
-different paths faster for large queues.
-
-The available schedules are:
- 
- - explore (default, original AFL)
- - exploit (original AFL)
- - fast (AFLfast)
- - coe (AFLfast)
- - quad (AFLfast)
- - lin (AFLfast)
- - rare (afl++ experimental)
- - mmopt (afl++ experimental)
- - seek (afl++ experimental)
-
-In parallel mode (-M/-S, several instances with the shared queue), we suggest
-to run the main node using the default explore schedule (`-p explore`) and the
-secondary nodes with different schedules. If a schedule does not perform well
-for a target, restart the secondary nodes with a different schedule.
-
-More details can be found in the paper published at the 23rd ACM Conference on
-Computer and Communications Security [CCS'16](https://www.sigsac.org/ccs/CCS2016/accepted-papers/)
-
-## Choosing initial test cases
-
-To operate correctly, the fuzzer requires one or more starting file that
-contains a good example of the input data normally expected by the targeted
-application. There are two basic rules:
-
-  - Keep the files small. Under 1 kB is ideal, although not strictly necessary.
-    For a discussion of why size matters, see [perf_tips.md](docs/perf_tips.md).
-
-  - Use multiple test cases only if they are functionally different from
-    each other. There is no point in using fifty different vacation photos
-    to fuzz an image library.
-
-You can find many good examples of starting files in the testcases/ subdirectory
-that comes with this tool.
-
-PS. If a large corpus of data is available for screening, you may want to use
-the afl-cmin utility to identify a subset of functionally distinct files that
-exercise different code paths in the target binary.
-
-
-## Fuzzing binaries
-
-The fuzzing process itself is carried out by the afl-fuzz utility. This program
-requires a read-only directory with initial test cases, a separate place to
-store its findings, plus a path to the binary to test.
-
-For target binaries that accept input directly from stdin, the usual syntax is:
-
-```shell
-./afl-fuzz -i testcase_dir -o findings_dir /path/to/program [...params...]
-```
-
-For programs that take input from a file, use '@@' to mark the location in
-the target's command line where the input file name should be placed. The
-fuzzer will substitute this for you:
-
-```shell
-./afl-fuzz -i testcase_dir -o findings_dir /path/to/program @@
-```
-
-You can also use the -f option to have the mutated data written to a specific
-file. This is useful if the program expects a particular file extension or so.
-
-Non-instrumented binaries can be fuzzed in the QEMU mode (add -Q in the command
-line) or in a traditional, blind-fuzzer mode (specify -n).
-
-You can use -t and -m to override the default timeout and memory limit for the
-executed process; rare examples of targets that may need these settings touched
-include compilers and video decoders.
-
-Tips for optimizing fuzzing performance are discussed in [perf_tips.md](docs/perf_tips.md).
-
-Note that afl-fuzz starts by performing an array of deterministic fuzzing
-steps, which can take several days, but tend to produce neat test cases. If you
-want quick & dirty results right away - akin to zzuf and other traditional
-fuzzers - add the -d option to the command line.
-
-## Interpreting output
-
-See the [docs/status_screen.md](docs/status_screen.md) file for information on
-how to interpret the displayed stats and monitor the health of the process. Be
-sure to consult this file especially if any UI elements are highlighted in red.
-
-The fuzzing process will continue until you press Ctrl-C. At a minimum, you want
-to allow the fuzzer to complete one queue cycle, which may take anywhere from a
-couple of hours to a week or so.
-
-There are three subdirectories created within the output directory and updated
-in real-time:
-
-  - queue/   - test cases for every distinctive execution path, plus all the
-               starting files given by the user. This is the synthesized corpus
-               mentioned in section 2.
-
-               Before using this corpus for any other purposes, you can shrink
-               it to a smaller size using the afl-cmin tool. The tool will find
-               a smaller subset of files offering equivalent edge coverage.
-
-  - crashes/ - unique test cases that cause the tested program to receive a
-               fatal signal (e.g., SIGSEGV, SIGILL, SIGABRT). The entries are 
-               grouped by the received signal.
-
-  - hangs/   - unique test cases that cause the tested program to time out. The
-               default time limit before something is classified as a hang is
-               the larger of 1 second and the value of the -t parameter.
-               The value can be fine-tuned by setting AFL_HANG_TMOUT, but this
-               is rarely necessary.
-
-Crashes and hangs are considered "unique" if the associated execution paths
-involve any state transitions not seen in previously-recorded faults. If a
-single bug can be reached in multiple ways, there will be some count inflation
-early in the process, but this should quickly taper off.
-
-The file names for crashes and hangs are correlated with the parent, non-faulting
-queue entries. This should help with debugging.
-
-When you can't reproduce a crash found by afl-fuzz, the most likely cause is
-that you are not setting the same memory limit as used by the tool. Try:
-
-```shell
-LIMIT_MB=50
-( ulimit -Sv $[LIMIT_MB << 10]; /path/to/tested_binary ... )
-```
-
-Change LIMIT_MB to match the -m parameter passed to afl-fuzz. On OpenBSD,
-also change -Sv to -Sd.
-
-Any existing output directory can be also used to resume aborted jobs; try:
-
-```shell
-./afl-fuzz -i- -o existing_output_dir [...etc...]
-```
-
-If you have gnuplot installed, you can also generate some pretty graphs for any
-active fuzzing task using afl-plot. For an example of how this looks like,
-see [http://lcamtuf.coredump.cx/afl/plot/](http://lcamtuf.coredump.cx/afl/plot/).
-
-## Parallelized fuzzing
-
-Every instance of afl-fuzz takes up roughly one core. This means that on
-multi-core systems, parallelization is necessary to fully utilize the hardware.
-For tips on how to fuzz a common target on multiple cores or multiple networked
-machines, please refer to [docs/parallel_fuzzing.md](docs/parallel_fuzzing.md).
-
-The parallel fuzzing mode also offers a simple way for interfacing AFL to other
-fuzzers, to symbolic or concolic execution engines, and so forth; again, see the
-last section of [docs/parallel_fuzzing.md](docs/parallel_fuzzing.md) for tips.
-
-## Fuzzer dictionaries
-
-By default, afl-fuzz mutation engine is optimized for compact data formats -
-say, images, multimedia, compressed data, regular expression syntax, or shell
-scripts. It is somewhat less suited for languages with particularly verbose and
-redundant verbiage - notably including HTML, SQL, or JavaScript.
-
-To avoid the hassle of building syntax-aware tools, afl-fuzz provides a way to
-seed the fuzzing process with an optional dictionary of language keywords,
-magic headers, or other special tokens associated with the targeted data type
--- and use that to reconstruct the underlying grammar on the go:
-
-  [http://lcamtuf.blogspot.com/2015/01/afl-fuzz-making-up-grammar-with.html](http://lcamtuf.blogspot.com/2015/01/afl-fuzz-making-up-grammar-with.html)
-
-To use this feature, you first need to create a dictionary in one of the two
-formats discussed in [dictionaries/README.md](dictionaries/README.md);
-and then point the fuzzer to it via the -x option in the command line.
-
-(Several common dictionaries are already provided in that subdirectory, too.)
-
-There is no way to provide more structured descriptions of the underlying
-syntax, but the fuzzer will likely figure out some of this based on the
-instrumentation feedback alone. This actually works in practice, say:
-
-  [http://lcamtuf.blogspot.com/2015/04/finding-bugs-in-sqlite-easy-way.html](http://lcamtuf.blogspot.com/2015/04/finding-bugs-in-sqlite-easy-way.html)
-
-PS. Even when no explicit dictionary is given, afl-fuzz will try to extract
-existing syntax tokens in the input corpus by watching the instrumentation
-very closely during deterministic byte flips. This works for some types of
-parsers and grammars but isn't nearly as good as the -x mode.
-
-If a dictionary is really hard to come by, another option is to let AFL run
-for a while and then use the token capture library that comes as a companion
-utility with AFL. For that, see [libtokencap/README.md](libtokencap/README.tokencap.md).
-
-## Crash triage
-
-The coverage-based grouping of crashes usually produces a small data set that
-can be quickly triaged manually or with a very simple GDB or Valgrind script.
-Every crash is also traceable to its parent non-crashing test case in the
-queue, making it easier to diagnose faults.
-
-Having said that, it's important to acknowledge that some fuzzing crashes can be
-difficult to quickly evaluate for exploitability without a lot of debugging and
-code analysis work. To assist with this task, afl-fuzz supports a very unique
-"crash exploration" mode enabled with the -C flag.
-
-In this mode, the fuzzer takes one or more crashing test cases as the input
-and uses its feedback-driven fuzzing strategies to very quickly enumerate all
-code paths that can be reached in the program while keeping it in the
-crashing state.
-
-Mutations that do not result in a crash are rejected; so are any changes that
-do not affect the execution path.
-
-The output is a small corpus of files that can be very rapidly examined to see
-what degree of control the attacker has over the faulting address, or whether
-it is possible to get past an initial out-of-bounds read - and see what lies
-beneath.
-
-Oh, one more thing: for test case minimization, give afl-tmin a try. The tool
-can be operated in a very simple way:
-
-```shell
-./afl-tmin -i test_case -o minimized_result -- /path/to/program [...]
-```
-
-The tool works with crashing and non-crashing test cases alike. In the crash
-mode, it will happily accept instrumented and non-instrumented binaries. In the
-non-crashing mode, the minimizer relies on standard AFL instrumentation to make
-the file simpler without altering the execution path.
-
-The minimizer accepts the -m, -t, -f and @@ syntax in a manner compatible with
-afl-fuzz.
-
-Another recent addition to AFL is the afl-analyze tool. It takes an input
-file, attempts to sequentially flip bytes, and observes the behavior of the
-tested program. It then color-codes the input based on which sections appear to
-be critical, and which are not; while not bulletproof, it can often offer quick
-insights into complex file formats. More info about its operation can be found
-near the end of [docs/technical_details.md](docs/technical_details.md).
-
-## Going beyond crashes
-
-Fuzzing is a wonderful and underutilized technique for discovering non-crashing
-design and implementation errors, too. Quite a few interesting bugs have been
-found by modifying the target programs to call abort() when say:
-
-  - Two bignum libraries produce different outputs when given the same
-    fuzzer-generated input,
-
-  - An image library produces different outputs when asked to decode the same
-    input image several times in a row,
-
-  - A serialization / deserialization library fails to produce stable outputs
-    when iteratively serializing and deserializing fuzzer-supplied data,
-
-  - A compression library produces an output inconsistent with the input file
-    when asked to compress and then decompress a particular blob.
-
-Implementing these or similar sanity checks usually takes very little time;
-if you are the maintainer of a particular package, you can make this code
-conditional with `#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` (a flag also
-shared with libfuzzer) or `#ifdef __AFL_COMPILER` (this one is just for AFL).
-
-## Common-sense risks
-
-Please keep in mind that, similarly to many other computationally-intensive
-tasks, fuzzing may put a strain on your hardware and on the OS. In particular:
-
-  - Your CPU will run hot and will need adequate cooling. In most cases, if
-    cooling is insufficient or stops working properly, CPU speeds will be
-    automatically throttled. That said, especially when fuzzing on less
-    suitable hardware (laptops, smartphones, etc), it's not entirely impossible
-    for something to blow up.
-
-  - Targeted programs may end up erratically grabbing gigabytes of memory or
-    filling up disk space with junk files. AFL tries to enforce basic memory
-    limits, but can't prevent each and every possible mishap. The bottom line
-    is that you shouldn't be fuzzing on systems where the prospect of data loss
-    is not an acceptable risk.
-
-  - Fuzzing involves billions of reads and writes to the filesystem. On modern
-    systems, this will be usually heavily cached, resulting in fairly modest
-    "physical" I/O - but there are many factors that may alter this equation.
-    It is your responsibility to monitor for potential trouble; with very heavy
-    I/O, the lifespan of many HDDs and SSDs may be reduced.
-
-    A good way to monitor disk I/O on Linux is the 'iostat' command:
-
-```shell
-    $ iostat -d 3 -x -k [...optional disk ID...]
-```
-
-## Known limitations & areas for improvement
-
-Here are some of the most important caveats for AFL:
-
-  - AFL detects faults by checking for the first spawned process dying due to
-    a signal (SIGSEGV, SIGABRT, etc). Programs that install custom handlers for
-    these signals may need to have the relevant code commented out. In the same
-    vein, faults in child processes spawned by the fuzzed target may evade
-    detection unless you manually add some code to catch that.
-
-  - As with any other brute-force tool, the fuzzer offers limited coverage if
-    encryption, checksums, cryptographic signatures, or compression are used to
-    wholly wrap the actual data format to be tested.
-
-    To work around this, you can comment out the relevant checks (see
-    examples/libpng_no_checksum/ for inspiration); if this is not possible,
-    you can also write a postprocessor, one of the hooks of custom mutators.
-    See [docs/custom_mutators.md](docs/custom_mutators.md) on how to use
-    `AFL_CUSTOM_MUTATOR_LIBRARY`
-
-  - There are some unfortunate trade-offs with ASAN and 64-bit binaries. This
-    isn't due to any specific fault of afl-fuzz; see [docs/notes_for_asan.md](docs/notes_for_asan.md)
-    for tips.
-
-  - There is no direct support for fuzzing network services, background
-    daemons, or interactive apps that require UI interaction to work. You may
-    need to make simple code changes to make them behave in a more traditional
-    way. Preeny may offer a relatively simple option, too - see:
-    [https://github.com/zardus/preeny](https://github.com/zardus/preeny)
-
-    Some useful tips for modifying network-based services can be also found at:
-    [https://www.fastly.com/blog/how-to-fuzz-server-american-fuzzy-lop](https://www.fastly.com/blog/how-to-fuzz-server-american-fuzzy-lop)
-
-  - AFL doesn't output human-readable coverage data. If you want to monitor
-    coverage, use afl-cov from Michael Rash: [https://github.com/mrash/afl-cov](https://github.com/mrash/afl-cov)
-
-  - Occasionally, sentient machines rise against their creators. If this
-    happens to you, please consult [http://lcamtuf.coredump.cx/prep/](http://lcamtuf.coredump.cx/prep/).
-
-Beyond this, see INSTALL for platform-specific tips.
-
-## Special thanks
-
-Many of the improvements to the original afl and afl++ wouldn't be possible
-without feedback, bug reports, or patches from:
-
-```
-  Jann Horn                             Hanno Boeck
-  Felix Groebert                        Jakub Wilk
-  Richard W. M. Jones                   Alexander Cherepanov
-  Tom Ritter                            Hovik Manucharyan
-  Sebastian Roschke                     Eberhard Mattes
-  Padraig Brady                         Ben Laurie
-  @dronesec                             Luca Barbato
-  Tobias Ospelt                         Thomas Jarosch
-  Martin Carpenter                      Mudge Zatko
-  Joe Zbiciak                           Ryan Govostes
-  Michael Rash                          William Robinet
-  Jonathan Gray                         Filipe Cabecinhas
-  Nico Weber                            Jodie Cunningham
-  Andrew Griffiths                      Parker Thompson
-  Jonathan Neuschaefer                  Tyler Nighswander
-  Ben Nagy                              Samir Aguiar
-  Aidan Thornton                        Aleksandar Nikolich
-  Sam Hakim                             Laszlo Szekeres
-  David A. Wheeler                      Turo Lamminen
-  Andreas Stieger                       Richard Godbee
-  Louis Dassy                           teor2345
-  Alex Moneger                          Dmitry Vyukov
-  Keegan McAllister                     Kostya Serebryany
-  Richo Healey                          Martijn Bogaard
-  rc0r                                  Jonathan Foote
-  Christian Holler                      Dominique Pelle
-  Jacek Wielemborek                     Leo Barnes
-  Jeremy Barnes                         Jeff Trull
-  Guillaume Endignoux                   ilovezfs
-  Daniel Godas-Lopez                    Franjo Ivancic
-  Austin Seipp                          Daniel Komaromy
-  Daniel Binderman                      Jonathan Metzman
-  Vegard Nossum                         Jan Kneschke
-  Kurt Roeckx                           Marcel Boehme
-  Van-Thuan Pham                        Abhik Roychoudhury
-  Joshua J. Drake                       Toby Hutton
-  Rene Freingruber                      Sergey Davidoff
-  Sami Liedes                           Craig Young
-  Andrzej Jackowski                     Daniel Hodson
-  Nathan Voss                           Dominik Maier
-  Andrea Biondo                         Vincent Le Garrec
-  Khaled Yakdan                         Kuang-che Wu
-  Josephine Calliotte                   Konrad Welc
-```
-
-Thank you!
-(For people sending pull requests - please add yourself to this list :-)
-
-## Contact
-
-Questions? Concerns? Bug reports? The contributors can be reached via
-[https://github.com/AFLplusplus/AFLplusplus](https://github.com/AFLplusplus/AFLplusplus)
-
-There is also a mailing list for the afl project; to join, send a mail to
-<afl-users+subscribe@googlegroups.com>. Or, if you prefer to browse
-archives first, try: [https://groups.google.com/group/afl-users](https://groups.google.com/group/afl-users)
diff --git a/docs/screenshot.png b/docs/screenshot.png
new file mode 100644
index 00000000..7b4dd7e4
Binary files /dev/null and b/docs/screenshot.png differ
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index f03c545d..39e4f32d 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -1234,6 +1234,7 @@ int main(int argc, char **argv_orig, char **envp) {
 
   }
 
+  (void)nice(-20);
   // real start time, we reset, so this works correctly with -V
   afl->start_time = get_cur_time();
 
-- 
cgit 1.4.1


From 0b8c44cbb1a29d54695115cfbe3b27f7bfe67560 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Tue, 28 Jul 2020 16:29:47 +0200
Subject: add FAQ

---
 README.md         |   3 ++
 docs/Changelog.md |   1 +
 docs/FAQ.md       | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 117 insertions(+)
 create mode 100644 docs/FAQ.md

(limited to 'docs')

diff --git a/README.md b/README.md
index 7268f5d1..62137855 100644
--- a/README.md
+++ b/README.md
@@ -563,6 +563,9 @@ others, e.g. custom mutator modules, sync to very different fuzzers, etc.
 
 ### The End
 
+Check out the [docs/FAQ](docs/FAQ.md) if it maybe answers your question (that
+you might not even have known you had ;-) ).
+
 This is basically all you need to know to professionally run fuzzing campaigns.
 If you want to know more, the rest of this README and the tons of texts in
 [docs/](docs/) will have you covered.
diff --git a/docs/Changelog.md b/docs/Changelog.md
index 38787def..cadfcb04 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -25,6 +25,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
   - added afl-frida gum solution to examples/afl_frida (mostly imported
     from https://github.com/meme/hotwax/)
   - small fixes to afl-plot, afl-whatsup and man page creation
+  - new README, added FAQ
 
 
 ### Version ++2.66c (release)
diff --git a/docs/FAQ.md b/docs/FAQ.md
new file mode 100644
index 00000000..d848e08a
--- /dev/null
+++ b/docs/FAQ.md
@@ -0,0 +1,113 @@
+# Frequently asked questions about afl++
+
+## Contents
+
+  1. [What is an edge?](#what-is-an-edge)
+  2. [Why is my stability below 100%?](#why-is-my-stability-below-100)
+  3. [How can I improve the stability value](#how-can-i-improve-the-stability-value)
+
+If you find an interesting or important question missing, submit it via
+[https://github.com/AFLplusplus/AFLplusplus/issues](https://github.com/AFLplusplus/AFLplusplus/issues)
+
+## What is an "edge"
+
+A program contains `functions`, `functions` contain the compiled machine code.
+The compiled machine code in a `function` can be in a single or many `basic blocks`.
+A `basic block` is the largest possible number of subsequent machine code
+instructions that runs independent, meaning it does not split up to different
+locations nor is it jumped into it from a different location:
+```
+function() {
+  A:
+    some
+    code
+  B:
+    if (x) goto C; else goto D;
+  C:
+    some code
+    goto D
+  D:
+    some code
+    goto B
+  E:
+    return
+}
+```
+Every code block between two jump locations is a `basic block`.
+
+An `edge` is then the unique relationship between two `basic blocks` (from the
+code example above):
+```
+              Block A
+                |
+                v
+              Block B  <------+
+             /        \       |
+            v          v      |
+         Block C    Block D --+
+             \
+              v
+              Block E
+```
+Every line between two blocks is an `edge`.
+
+## Why is my stability below 100
+
+Stability is measured by how many percent of the edges in the target are
+"stable". Sending the same input again and again should take the exact same
+path through the target every time. If that is the case, the stability is 100%.
+
+If however randomness happens, e.g. a thread reading from shared memory,
+reaction to timing, etc. then in some of the re-executions with the same data
+will result in the edge information being different accross runs.
+Those edges that change are then flagged "unstable".
+
+The more "unstable" edges, the more difficult for afl++ to identify valid new
+paths.
+
+A value above 90% is usually fine and a value above 80% is also still ok, and
+even above 20% can still result in successful finds of bugs.
+However, it is recommended that below 90% or 80% you should take measures to
+improve the stability.
+
+## How can I improve the stability value
+
+Four steps are required to do this and requires quite some knowledge of
+coding and/or disassembly and it is only effectively possible with
+afl-clang-fast PCGUARD and afl-clang-lto LTO instrumentation!
+
+  1. First step: Identify which edge ID numbers are unstable
+
+     run the target with `export AFL_DEBUG=1` for a few minutes then terminate.
+     The out/fuzzer_stats file will then show the edge IDs that were identified
+     as unstable.
+
+  2. Second step: Find the responsible function.
+
+     a) For LTO instrumented binaries just disassemble or decompile the target
+        and look which edge is writing to that edge ID. Ghidra is a good tool
+        for this: [https://ghidra-sre.org/](https://ghidra-sre.org/)
+
+     b) For PCGUARD instrumented binaries it is more difficult. Here you can
+        either modify the __sanitizer_cov_trace_pc_guard function in
+        llvm_mode/afl-llvm-rt.o.c to write a backtrace to a file if the ID in
+        __afl_area_ptr[*guard] is one of the unstable edge IDs. Then recompile
+        and reinstall llvm_mode and rebuild your target. Run the recompiled
+	target with afl-fuzz for a while and then check the file that you
+        wrote with the backtrace information.
+        Alternatively you can use `gdb` to hook __sanitizer_cov_trace_pc_guard_init
+        on start, check to which memory address the edge ID value is written
+        and set a write breakpoint to that address (`watch 0x.....`).
+
+  3. Third step: create a text file with the filenames
+
+     Identify which source code files contain the functions that you need to
+     remove from instrumentation.
+
+     Simply follow this document on how to do this: [llvm_mode/README.instrument_file.md](llvm_mode/README.instrument_file.md)
+     If PCGUARD is used, then you need to follow this guide: [http://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation](http://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation)
+
+  4. Fourth step: recompile the target
+
+     Recompile, fuzz it, be happy :)
+
-- 
cgit 1.4.1


From 6cfa27d78ab9fb178a1678bdcc36cb62a555f7a4 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Wed, 29 Jul 2020 11:47:32 +0200
Subject: remove dead code, code-format

---
 docs/Changelog.md    |   4 +-
 src/afl-fuzz-one.c   | 532 +--------------------------------------------------
 src/afl-fuzz-stats.c | 134 ++++++-------
 3 files changed, 71 insertions(+), 599 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index cadfcb04..d3d5063b 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -14,6 +14,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - added -F option to allow -M main fuzzers to sync to foreign fuzzers,
        e.g. honggfuzz or libfuzzer
      - eliminated CPU affinity race condition for -S/-M runs
+     - expanded havoc mode added, on no cycle finds add extra splicing and
+       MOpt into the mix
   - llvm_mode:
      - now supports llvm 12!
      - fixes for laf-intel float splitting (thanks to mark-griffin for
@@ -21,7 +23,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - LTO: autodictionary mode is a default
      - LTO: instrim instrumentation disabled, only classic support used
             as it is always better
-  - added honggfuzz mangle as a custom mutator in custom_mutators/honggfuzz :)
+  - added honggfuzz mangle as a custom mutator in custom_mutators/honggfuzz
   - added afl-frida gum solution to examples/afl_frida (mostly imported
     from https://github.com/meme/hotwax/)
   - small fixes to afl-plot, afl-whatsup and man page creation
diff --git a/src/afl-fuzz-one.c b/src/afl-fuzz-one.c
index f8680100..a42bb0fc 100644
--- a/src/afl-fuzz-one.c
+++ b/src/afl-fuzz-one.c
@@ -27,10 +27,6 @@
 #include <string.h>
 #include <limits.h>
 
-/* static u8 *strnstr(const u8 *s, const u8 *find, size_t slen);
-static u32 string_replace(u8 **out_buf, s32 *temp_len, u32 pos, u8 *from,
-                          u8 *to); */
-
 /* MOpt */
 
 static int select_algorithm(afl_state_t *afl) {
@@ -370,524 +366,6 @@ static void locate_diffs(u8 *ptr1, u8 *ptr2, u32 len, s32 *first, s32 *last) {
 
 #define BUF_PARAMS(name) (void **)&afl->name##_buf, &afl->name##_size
 
-#if 0
-/* search a string */
-
-static u8 *strnstr(const u8 *s, const u8 *find, size_t slen) {
-
-  char   c, sc;
-  size_t len;
-
-  if ((c = *find++) != '\0') {
-
-    len = strlen(find);
-    do {
-
-      do {
-
-        if (slen-- < 1 || (sc = *s++) == '\0') return (NULL);
-
-      } while (sc != c);
-
-      if (len > slen) return (NULL);
-
-    } while (strncmp(s, find, len) != 0);
-
-    s--;
-
-  }
-
-  return ((u8 *)s);
-
-}
-
-/* replace between deliminators, if rep == NULL, then we will duplicate the
- * target */
-
-static u32 delim_replace(u8 **out_buf, s32 *temp_len, size_t pos,
-                         const u8 *ldelim, const u8 *rdelim, u8 *rep) {
-
-  u8 *end_buf = *out_buf + *temp_len;
-  u8 *ldelim_start = strnstr(*out_buf + pos, ldelim, *temp_len - pos);
-
-  if (ldelim_start != NULL) {
-
-    u32 max = (end_buf - ldelim_start - 1 > AFL_TXT_STRING_MAX_LEN
-                   ? AFL_TXT_STRING_MAX_LEN
-                   : end_buf - ldelim_start - 1);
-
-    if (max > 0) {
-
-      u8 *rdelim_end = strnstr(ldelim_start + 1, rdelim, max);
-
-      if (rdelim_end != NULL) {
-
-        u32 rep_len, delim_space_len = rdelim_end - ldelim_start - 1, xtra = 0;
-
-        if (rep != NULL) {
-
-          rep_len = (u32)strlen(rep);
-
-        } else {  // NULL? then we copy the value in between the delimiters
-
-          rep_len = delim_space_len;
-          delim_space_len = 0;
-          rep = ldelim_start + 1;
-          xtra = rep_len;
-
-        }
-
-        if (rep_len != delim_space_len) {
-
-          memmove(ldelim_start + rep_len + xtra + 1, rdelim_end,
-                  *temp_len - (rdelim_end - *out_buf));
-
-        }
-
-        memcpy(ldelim_start + 1, rep, rep_len);
-        *temp_len = (*temp_len - delim_space_len + rep_len);
-
-        return 1;
-
-      }
-
-    }
-
-  }
-
-  return 0;
-
-}
-
-static u32 delim_swap(u8 **out_buf, s32 *temp_len, size_t pos, const u8 *ldelim,
-                      const u8 *mdelim, const u8 *rdelim) {
-
-  u8 *out_buf_end = *out_buf + *temp_len;
-  u32 max = (*temp_len - pos > AFL_TXT_STRING_MAX_LEN ? AFL_TXT_STRING_MAX_LEN
-                                                      : *temp_len - pos);
-  u8 *ldelim_start = strnstr(*out_buf + pos, ldelim, max);
-
-  if (ldelim_start != NULL) {
-
-    max = (out_buf_end - ldelim_start - 1 > AFL_TXT_STRING_MAX_LEN
-               ? AFL_TXT_STRING_MAX_LEN
-               : out_buf_end - ldelim_start - 1);
-    if (max > 1) {
-
-      u8 *mdelim_pos = strnstr(ldelim_start + 1, mdelim, max);
-
-      if (mdelim_pos != NULL) {
-
-        max = (out_buf_end - mdelim_pos - 1 > AFL_TXT_STRING_MAX_LEN
-                   ? AFL_TXT_STRING_MAX_LEN
-                   : out_buf_end - mdelim_pos - 1);
-        if (max > 0) {
-
-          u8 *rdelim_end = strnstr(mdelim + 1, rdelim, max);
-
-          if (rdelim_end != NULL) {
-
-            u32 first_len = mdelim_pos - ldelim_start - 1;
-            u32 second_len = rdelim_end - mdelim_pos - 1;
-            u8  scratch[AFL_TXT_STRING_MAX_LEN];
-
-            memcpy(scratch, ldelim_start + 1, first_len);
-
-            if (first_len != second_len) {
-
-              memmove(ldelim_start + second_len + 1, mdelim_pos,
-                      out_buf_end - mdelim_pos);
-
-            }
-
-            memcpy(ldelim_start + 1, mdelim_pos + 1, second_len);
-
-            if (first_len != second_len) {
-
-              memmove(mdelim_pos + first_len + 1, rdelim_end,
-                      out_buf_end - rdelim_end);
-
-            }
-
-            memcpy(mdelim_pos + 1, scratch, first_len);
-
-            return 1;
-
-          }
-
-        }
-
-      }
-
-    }
-
-  }
-
-  return 0;
-
-}
-
-/* replace a string */
-
-static u32 string_replace(u8 **out_buf, s32 *temp_len, u32 pos, u8 *from,
-                          u8 *to) {
-
-  u8 *start = strnstr(*out_buf + pos, from, *temp_len - pos);
-
-  if (start) {
-
-    u32 from_len = strlen(from);
-    u32 to_len = strlen(to);
-
-    if (from_len != to_len) {
-
-      memmove(start + to_len, start + from_len,
-              *temp_len - from_len - (start - *out_buf));
-
-    }
-
-    memcpy(start, to, to_len);
-    *temp_len = (*temp_len - from_len + to_len);
-
-    return 1;
-
-  }
-
-  return 0;
-
-}
-
-/* Returns 1 if a mutant was generated and placed in out_buf, 0 if none
- * generated. */
-
-static const uint8_t text_mutation_special_chars[] = {
-
-    '\t', '\n', '\r', ' ', '!', '"', '$', '%', '&', '\'', '(', ')', '*',
-    '+',  ',',  '-',  '.', '/', ':', ';', '<', '=', '>',  '?', '@', '[',
-    '\\', ']',  '^',  '_', '`', '{', '|', '}', '~', ' '  // space is here twice
-
-};
-
-static int text_mutation(afl_state_t *afl, u8 **out_buf, s32 *orig_temp_len) {
-
-  if (*orig_temp_len < AFL_TXT_MIN_LEN) { return 0; }
-
-  s32 temp_len;
-  u32 pos, yes = 0,
-           mutations = rand_below(afl, AFL_TXT_STRING_MAX_MUTATIONS) + 16;
-  u8 *new_buf =
-      ck_maybe_grow(BUF_PARAMS(out_scratch),
-                    *orig_temp_len + AFL_TXT_STRING_MAX_MUTATIONS + 16);
-  u8 fromc[2] = {0, 0}, toc[2] = {0, 0};
-  temp_len = *orig_temp_len;
-  memcpy(new_buf, *out_buf, temp_len);
-  new_buf[temp_len] = 0;
-
-  for (u32 i = 0; i < mutations; i++) {
-
-    if (temp_len < AFL_TXT_MIN_LEN) { return 0; }
-
-    pos = rand_below(afl, temp_len - 1);
-    int choice = rand_below(afl, 100);
-
-    switch (choice) {
-
-        /* 50% -> fixed replacements */
-
-      case 0:                                /* Semantic statement deletion */
-        yes += string_replace(&new_buf, &temp_len, pos, "\n", "#");
-        break;
-      case 1:
-        yes += string_replace(&new_buf, &temp_len, pos, "(", "(!");
-        break;
-      case 2:
-        yes += string_replace(&new_buf, &temp_len, pos, "==", "!=");
-        break;
-      case 3:
-        yes += string_replace(&new_buf, &temp_len, pos, "!=", "==");
-        break;
-      case 4:
-        yes += string_replace(&new_buf, &temp_len, pos, "==", "<");
-        break;
-      case 5:
-        yes += string_replace(&new_buf, &temp_len, pos, "<", "==");
-        break;
-      case 6:
-        yes += string_replace(&new_buf, &temp_len, pos, "==", ">");
-        break;
-      case 7:
-        yes += string_replace(&new_buf, &temp_len, pos, ">", "==");
-        break;
-      case 8:
-        yes += string_replace(&new_buf, &temp_len, pos, "=", "<");
-        break;
-      case 9:
-        yes += string_replace(&new_buf, &temp_len, pos, "=", ">");
-        break;
-      case 10:
-        yes += string_replace(&new_buf, &temp_len, pos, "<", ">");
-        break;
-      case 11:
-        yes += string_replace(&new_buf, &temp_len, pos, ">", "<");
-        break;
-      case 12:
-        yes += string_replace(&new_buf, &temp_len, pos, "++", "--");
-        break;
-      case 13:
-        yes += string_replace(&new_buf, &temp_len, pos, "--", "++");
-        break;
-      case 14:
-        yes += string_replace(&new_buf, &temp_len, pos, "+", "-");
-        break;
-      case 15:
-        yes += string_replace(&new_buf, &temp_len, pos, "-", "+");
-        break;
-      case 16:
-        yes += string_replace(&new_buf, &temp_len, pos, "0", "1");
-        break;
-      case 17:
-        yes += string_replace(&new_buf, &temp_len, pos, "1", "0");
-        break;
-      case 18:
-        yes += string_replace(&new_buf, &temp_len, pos, "&&", "||");
-        break;
-      case 19:
-        yes += string_replace(&new_buf, &temp_len, pos, "||", "&&");
-        break;
-      case 20:
-        yes += string_replace(&new_buf, &temp_len, pos, "!", "");
-        break;
-      case 21:
-        yes += string_replace(&new_buf, &temp_len, pos, "==", "=");
-        break;
-      case 22:
-        yes += string_replace(&new_buf, &temp_len, pos, "=", "==");
-        break;
-      case 23:
-        yes += string_replace(&new_buf, &temp_len, pos, "--", "");
-        break;
-      case 24:
-        yes += string_replace(&new_buf, &temp_len, pos, "<<", "<");
-        break;
-      case 25:
-        yes += string_replace(&new_buf, &temp_len, pos, ">>", ">");
-        break;
-      case 26:
-        yes += string_replace(&new_buf, &temp_len, pos, "<", "<<");
-        break;
-      case 27:
-        yes += string_replace(&new_buf, &temp_len, pos, ">", ">>");
-        break;
-      case 28:
-        yes += string_replace(&new_buf, &temp_len, pos, "'", "\"");
-        break;
-      case 29:
-        yes += string_replace(&new_buf, &temp_len, pos, "\"", "'");
-        break;
-      case 30:  /* Remove a semicolon delimited statement after a semicolon */
-        yes += delim_replace(&new_buf, &temp_len, pos, ";", ";", ";");
-        break;
-      case 31: /* Remove a semicolon delimited statement after a left curly
-                  brace */
-        yes += delim_replace(&new_buf, &temp_len, pos, "}", ";", "}");
-        break;
-      case 32:                            /* Remove a curly brace construct */
-        yes += delim_replace(&new_buf, &temp_len, pos, "{", "}", "");
-        break;
-      case 33:         /* Replace a curly brace construct with an empty one */
-        yes += delim_replace(&new_buf, &temp_len, pos, "{", "}", "{}");
-        break;
-      case 34:
-        yes += delim_swap(&new_buf, &temp_len, pos, ";", ";", ";");
-        break;
-      case 35:
-        yes += delim_swap(&new_buf, &temp_len, pos, "}", ";", ";");
-        break;
-      case 36:                        /* Swap comma delimited things case 1 */
-        yes += delim_swap(&new_buf, &temp_len, pos, "(", ",", ")");
-        break;
-      case 37:                        /* Swap comma delimited things case 2 */
-        yes += delim_swap(&new_buf, &temp_len, pos, "(", ",", ",");
-        break;
-      case 38:                        /* Swap comma delimited things case 3 */
-        yes += delim_swap(&new_buf, &temp_len, pos, ",", ",", ",");
-        break;
-      case 39:                        /* Swap comma delimited things case 4 */
-        yes += delim_swap(&new_buf, &temp_len, pos, ",", ",", ")");
-        break;
-      case 40:                                        /* Just delete a line */
-        yes += delim_replace(&new_buf, &temp_len, pos, "\n", "\n", "");
-        break;
-      case 41:                      /* Delete something like "const" case 1 */
-        yes += delim_replace(&new_buf, &temp_len, pos, " ", " ", "");
-        break;
-      case 42:                      /* Delete something like "const" case 2 */
-        yes += delim_replace(&new_buf, &temp_len, pos, "\n", " ", "");
-        break;
-      case 43:                      /* Delete something like "const" case 3 */
-        yes += delim_replace(&new_buf, &temp_len, pos, "(", " ", "");
-        break;
-      case 44:                        /* Swap space delimited things case 1 */
-        yes += delim_swap(&new_buf, &temp_len, pos, " ", " ", " ");
-        break;
-      case 45:                        /* Swap space delimited things case 2 */
-        yes += delim_swap(&new_buf, &temp_len, pos, " ", " ", ")");
-        break;
-      case 46:                        /* Swap space delimited things case 3 */
-        yes += delim_swap(&new_buf, &temp_len, pos, "(", " ", " ");
-        break;
-      case 47:                        /* Swap space delimited things case 4 */
-        yes += delim_swap(&new_buf, &temp_len, pos, "(", " ", ")");
-        break;
-      case 48:                           /* Duplicate a single line of code */
-        yes += delim_replace(&new_buf, &temp_len, pos, "\n", "\n", NULL);
-        break;
-      case 49:  /* Duplicate a construct (most often, a non-nested for loop */
-        yes += delim_replace(&new_buf, &temp_len, pos, "\n", "}", NULL);
-        break;
-      default: {
-
-        /* 5% is transforming ascii numbers */
-
-        if (choice < 55) {
-
-          for (u32 j = pos; j < temp_len; ++j) {
-
-            if (isdigit(new_buf[j])) {
-
-              new_buf[temp_len] =
-                  0;  // should be safe thanks to the initial grow
-
-              u8 *               endptr;
-              unsigned long long num =
-                  strtoull(new_buf + j, (char **)&endptr, 0);
-
-              switch (rand_below(afl, 8)) {
-
-                case 0:
-                  num = rand_below(afl, INT_MAX);
-                  break;
-                case 1:
-                  num = rand_next(afl);
-                  break;
-                case 2:
-                  num += 1 + rand_below(afl, 255);
-                  break;
-                case 3:
-                  num -= 1 + rand_below(afl, 255);
-                  break;
-                case 4:
-                  num *= 1 + rand_below(afl, 255);
-                  break;
-                case 5:
-                  num /= 1 + rand_below(afl, 255);
-                  break;
-                case 6:
-                  num /= 1 + rand_below(afl, 255);
-                  break;
-                case 7:
-                  num = ~num;
-                  break;
-
-              }
-
-              const char *fmt = "%llu";
-              if (rand_below(afl, 5) == 0)  // add - sign with 1/5 probability
-                fmt = "-%llu";
-
-              size_t num_len = snprintf(NULL, 0, fmt, num);
-              size_t old_len = endptr - (new_buf + j);
-              if (num_len < old_len) {
-
-                memmove(new_buf + j + num_len, new_buf + j + old_len,
-                        temp_len - (j + old_len));
-                snprintf(new_buf + j, num_len, fmt, num);
-                temp_len -= old_len - num_len;
-
-              } else if (num_len == old_len) {
-
-                snprintf(new_buf + j, num_len, fmt, num);
-
-              } else {
-
-                new_buf = ck_maybe_grow(BUF_PARAMS(out_scratch),
-                                        temp_len + (num_len - old_len) +
-                                            AFL_TXT_STRING_MAX_MUTATIONS + 1);
-                memmove(new_buf + j + num_len, new_buf + j + old_len,
-                        temp_len - (j + old_len));
-                snprintf(new_buf + j, num_len, fmt, num);
-                temp_len += num_len - old_len;
-
-              }
-
-              yes += 1;
-              break;
-
-            }
-
-          }
-
-        } else if (choice < 85) {
-
-          /* 30% is special character transform */
-
-          fromc[0] = text_mutation_special_chars[rand_below(
-              afl, sizeof(text_mutation_special_chars))];
-
-          do {
-
-            toc[0] = text_mutation_special_chars[rand_below(
-                afl, sizeof(text_mutation_special_chars))];
-
-          } while (toc[0] == fromc[0]);
-
-          yes += string_replace(&new_buf, &temp_len, pos, fromc, toc);
-          break;
-
-        } else {
-
-          /* 15% is random text character transform */
-
-          u32 iter, cnt, loc, prev_loc = temp_len;
-          if (temp_len > 32) {
-
-            cnt = 1 + rand_below(afl, 5);
-
-          } else {
-
-            cnt = rand_below(afl, 2);
-
-          }
-
-          for (iter = 0; iter <= cnt; iter++) {
-
-            while ((loc = rand_below(afl, temp_len)) == prev_loc)
-              ;
-            new_buf[loc] = 32 + rand_below(afl, 'z' - ' ' + 1);
-            prev_loc = loc;
-
-          }
-
-        }
-
-      }
-
-    }
-
-  }
-
-  if (yes == 0 || temp_len <= 0) { return 0; }
-
-  swap_bufs(BUF_PARAMS(out), BUF_PARAMS(out_scratch));
-  *out_buf = new_buf;
-  *orig_temp_len = temp_len;
-
-  return 1;
-
-}
-
-#endif                                                              /* if 0 */
-
 /* Take the current entry from the queue, fuzz it for a while. This
    function is a tad too long... returns 0 if fuzzed successfully, 1 if
    skipped or bailed out. */
@@ -2926,15 +2404,7 @@ havoc_stage:
 
           }
 
-          /*              default:
-
-                          // perform ascii mutations
-                          if (text_mutation(afl, &out_buf, &temp_len) == 0)
-                            goto retry_havoc;
-
-                      }  // end default: switch(r)
-
-          */
+          // end of default:
 
       }
 
diff --git a/src/afl-fuzz-stats.c b/src/afl-fuzz-stats.c
index 9b16c226..7b30b5ea 100644
--- a/src/afl-fuzz-stats.c
+++ b/src/afl-fuzz-stats.c
@@ -82,60 +82,59 @@ void write_stats_file(afl_state_t *afl, double bitmap_cvg, double stability,
   if (getrusage(RUSAGE_CHILDREN, &rus)) { rus.ru_maxrss = 0; }
 #endif
 
-  fprintf(
-      f,
-      "start_time        : %llu\n"
-      "last_update       : %llu\n"
-      "run_time          : %llu\n"
-      "fuzzer_pid        : %u\n"
-      "cycles_done       : %llu\n"
-      "cycles_wo_finds   : %llu\n"
-      "execs_done        : %llu\n"
-      "execs_per_sec     : %0.02f\n"
-      "execs_ps_last_min : %0.02f\n"
-      "paths_total       : %u\n"
-      "paths_favored     : %u\n"
-      "paths_found       : %u\n"
-      "paths_imported    : %u\n"
-      "max_depth         : %u\n"
-      "cur_path          : %u\n"        /* Must match find_start_position() */
-      "pending_favs      : %u\n"
-      "pending_total     : %u\n"
-      "variable_paths    : %u\n"
-      "stability         : %0.02f%%\n"
-      "bitmap_cvg        : %0.02f%%\n"
-      "unique_crashes    : %llu\n"
-      "unique_hangs      : %llu\n"
-      "last_path         : %llu\n"
-      "last_crash        : %llu\n"
-      "last_hang         : %llu\n"
-      "execs_since_crash : %llu\n"
-      "exec_timeout      : %u\n"
-      "slowest_exec_ms   : %u\n"
-      "peak_rss_mb       : %lu\n"
-      "cpu_affinity      : %d\n"
-      "edges_found       : %u\n"
-      "var_byte_count    : %u\n"
-      "havoc_expansion   : %u\n"
-      "afl_banner        : %s\n"
-      "afl_version       : " VERSION
-      "\n"
-      "target_mode       : %s%s%s%s%s%s%s%s%s\n"
-      "command_line      : %s\n",
-      afl->start_time / 1000, cur_time / 1000,
-      (cur_time - afl->start_time) / 1000, (u32)getpid(),
-      afl->queue_cycle ? (afl->queue_cycle - 1) : 0, afl->cycles_wo_finds,
-      afl->fsrv.total_execs,
-      afl->fsrv.total_execs /
-          ((double)(get_cur_time() - afl->start_time) / 1000),
-      afl->last_avg_execs_saved,
-      afl->queued_paths, afl->queued_favored, afl->queued_discovered,
-      afl->queued_imported, afl->max_depth, afl->current_entry,
-      afl->pending_favored, afl->pending_not_fuzzed, afl->queued_variable,
-      stability, bitmap_cvg, afl->unique_crashes, afl->unique_hangs,
-      afl->last_path_time / 1000, afl->last_crash_time / 1000,
-      afl->last_hang_time / 1000, afl->fsrv.total_execs - afl->last_crash_execs,
-      afl->fsrv.exec_tmout, afl->slowest_exec_ms,
+  fprintf(f,
+          "start_time        : %llu\n"
+          "last_update       : %llu\n"
+          "run_time          : %llu\n"
+          "fuzzer_pid        : %u\n"
+          "cycles_done       : %llu\n"
+          "cycles_wo_finds   : %llu\n"
+          "execs_done        : %llu\n"
+          "execs_per_sec     : %0.02f\n"
+          "execs_ps_last_min : %0.02f\n"
+          "paths_total       : %u\n"
+          "paths_favored     : %u\n"
+          "paths_found       : %u\n"
+          "paths_imported    : %u\n"
+          "max_depth         : %u\n"
+          "cur_path          : %u\n"    /* Must match find_start_position() */
+          "pending_favs      : %u\n"
+          "pending_total     : %u\n"
+          "variable_paths    : %u\n"
+          "stability         : %0.02f%%\n"
+          "bitmap_cvg        : %0.02f%%\n"
+          "unique_crashes    : %llu\n"
+          "unique_hangs      : %llu\n"
+          "last_path         : %llu\n"
+          "last_crash        : %llu\n"
+          "last_hang         : %llu\n"
+          "execs_since_crash : %llu\n"
+          "exec_timeout      : %u\n"
+          "slowest_exec_ms   : %u\n"
+          "peak_rss_mb       : %lu\n"
+          "cpu_affinity      : %d\n"
+          "edges_found       : %u\n"
+          "var_byte_count    : %u\n"
+          "havoc_expansion   : %u\n"
+          "afl_banner        : %s\n"
+          "afl_version       : " VERSION
+          "\n"
+          "target_mode       : %s%s%s%s%s%s%s%s%s\n"
+          "command_line      : %s\n",
+          afl->start_time / 1000, cur_time / 1000,
+          (cur_time - afl->start_time) / 1000, (u32)getpid(),
+          afl->queue_cycle ? (afl->queue_cycle - 1) : 0, afl->cycles_wo_finds,
+          afl->fsrv.total_execs,
+          afl->fsrv.total_execs /
+              ((double)(get_cur_time() - afl->start_time) / 1000),
+          afl->last_avg_execs_saved, afl->queued_paths, afl->queued_favored,
+          afl->queued_discovered, afl->queued_imported, afl->max_depth,
+          afl->current_entry, afl->pending_favored, afl->pending_not_fuzzed,
+          afl->queued_variable, stability, bitmap_cvg, afl->unique_crashes,
+          afl->unique_hangs, afl->last_path_time / 1000,
+          afl->last_crash_time / 1000, afl->last_hang_time / 1000,
+          afl->fsrv.total_execs - afl->last_crash_execs, afl->fsrv.exec_tmout,
+          afl->slowest_exec_ms,
 #ifndef __HAIKU__
   #ifdef __APPLE__
           (unsigned long int)(rus.ru_maxrss >> 20),
@@ -150,19 +149,20 @@ void write_stats_file(afl_state_t *afl, double bitmap_cvg, double stability,
 #else
           -1,
 #endif
-      t_bytes, afl->var_byte_count, afl->expand_havoc, afl->use_banner,
-      afl->unicorn_mode ? "unicorn" : "", afl->fsrv.qemu_mode ? "qemu " : "",
-      afl->non_instrumented_mode ? " non_instrumented " : "",
-      afl->no_forkserver ? "no_fsrv " : "", afl->crash_mode ? "crash " : "",
-      afl->persistent_mode ? "persistent " : "",
-      afl->shmem_testcase_mode ? "shmem_testcase " : "",
-      afl->deferred_mode ? "deferred " : "",
-      (afl->unicorn_mode || afl->fsrv.qemu_mode || afl->non_instrumented_mode ||
-       afl->no_forkserver || afl->crash_mode || afl->persistent_mode ||
-       afl->deferred_mode)
-          ? ""
-          : "default",
-      afl->orig_cmdline);
+          t_bytes, afl->var_byte_count, afl->expand_havoc, afl->use_banner,
+          afl->unicorn_mode ? "unicorn" : "",
+          afl->fsrv.qemu_mode ? "qemu " : "",
+          afl->non_instrumented_mode ? " non_instrumented " : "",
+          afl->no_forkserver ? "no_fsrv " : "", afl->crash_mode ? "crash " : "",
+          afl->persistent_mode ? "persistent " : "",
+          afl->shmem_testcase_mode ? "shmem_testcase " : "",
+          afl->deferred_mode ? "deferred " : "",
+          (afl->unicorn_mode || afl->fsrv.qemu_mode ||
+           afl->non_instrumented_mode || afl->no_forkserver ||
+           afl->crash_mode || afl->persistent_mode || afl->deferred_mode)
+              ? ""
+              : "default",
+          afl->orig_cmdline);
   /* ignore errors */
 
   if (afl->debug) {
-- 
cgit 1.4.1


From 22921c493fbf48b317354bb50f1af4a678fcfb55 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Wed, 29 Jul 2020 12:58:02 +0200
Subject: improve docs, enable laf compare if float is set

---
 README.md                     | 12 ++++++++++++
 docs/Changelog.md             |  2 ++
 docs/FAQ.md                   | 17 ++++++++++++++---
 docs/binaryonly_fuzzing.md    | 19 +++++++++++++++++++
 llvm_mode/README.laf-intel.md |  4 ++--
 llvm_mode/afl-clang-fast.c    |  3 ++-
 6 files changed, 51 insertions(+), 6 deletions(-)

(limited to 'docs')

diff --git a/README.md b/README.md
index 0716b750..fb283f13 100644
--- a/README.md
+++ b/README.md
@@ -436,6 +436,9 @@ more useful.
 If you just use one CPU for fuzzing, then you are fuzzing just for fun and not
 seriously :-)
 
+Pro tip: load the [afl++ snapshot module](https://github.com/AFLplusplus/AFL-Snapshot-LKM) before start afl-fuzz as this improves
+performance by a x2 speed increase!
+
 #### a) running afl-fuzz
 
 Before to do even a test run of afl-fuzz execute `sudo afl-system-config` (on
@@ -562,6 +565,15 @@ then you can expect that your fuzzing won't be fruitful anymore.
 However often this just means that you should switch out secondaries for
 others, e.g. custom mutator modules, sync to very different fuzzers, etc.
 
+#### f) improve the speed!
+
+ * Use [persistent mode](llvm_mode/README.persistent_mode.md) (x2-x20 speed increase)
+ * Use the [afl++ snapshot module](https://github.com/AFLplusplus/AFL-Snapshot-LKM) (x2 speed increase)
+ * If you do not use shmem persistent mode, use `AFL_TMPDIR` to point the input file on a tempfs location, see [docs/env_variables.md](docs/env_variables.md)
+ * Improve kernel performance: modify `/etc/default/grub`, set `GRUB_CMDLINE_LINUX_DEFAULT="ibpb=off ibrs=off kpti=off l1tf=off mds=off mitigations=off no_stf_barrier noibpb noibrs nopcid nopti nospec_store_bypass_disable nospectre_v1 nospectre_v2 pcid=off pti=off spec_store_bypass_disable=off spectre_v2=off stf_barrier=off"`; then `update-grub` and `reboot` (warning: makes the system more insecure)
+ * Running on an `ext2` filesystem with `noatime` mount option will be a bit faster than on any other journaling filesystem
+ * Use your cores! [3.b) Using multiple cores/threads](#b-using-multiple-coresthreads)
+
 ### The End
 
 Check out the [docs/FAQ](docs/FAQ.md) if it maybe answers your question (that
diff --git a/docs/Changelog.md b/docs/Changelog.md
index d3d5063b..7efab1e6 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -23,6 +23,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - LTO: autodictionary mode is a default
      - LTO: instrim instrumentation disabled, only classic support used
             as it is always better
+     - setting AFL_LLVM_LAF_SPLIT_FLOATS now activates
+       AFL_LLVM_LAF_SPLIT_COMPARES
   - added honggfuzz mangle as a custom mutator in custom_mutators/honggfuzz
   - added afl-frida gum solution to examples/afl_frida (mostly imported
     from https://github.com/meme/hotwax/)
diff --git a/docs/FAQ.md b/docs/FAQ.md
index d848e08a..e09385a8 100644
--- a/docs/FAQ.md
+++ b/docs/FAQ.md
@@ -2,13 +2,24 @@
 
 ## Contents
 
-  1. [What is an edge?](#what-is-an-edge)
-  2. [Why is my stability below 100%?](#why-is-my-stability-below-100)
-  3. [How can I improve the stability value](#how-can-i-improve-the-stability-value)
+  1. [How to improve the fuzzing speed?](#how-to-improve-the-fuzzing-speed)
+  2. [What is an edge?](#what-is-an-edge)
+  3. [Why is my stability below 100%?](#why-is-my-stability-below-100)
+  4. [How can I improve the stability value](#how-can-i-improve-the-stability-value)
 
 If you find an interesting or important question missing, submit it via
 [https://github.com/AFLplusplus/AFLplusplus/issues](https://github.com/AFLplusplus/AFLplusplus/issues)
 
+## How to improve the fuzzing speed
+
+  1. use [llvm_mode](docs/llvm_mode/README.md): afl-clang-lto (llvm >= 11) or afl-clang-fast (llvm >= 9 recommended)
+  2. Use [persistent mode](llvm_mode/README.persistent_mode.md) (x2-x20 speed increase)
+  3. Use the [afl++ snapshot module](https://github.com/AFLplusplus/AFL-Snapshot-LKM) (x2 speed increase)
+  4. If you do not use shmem persistent mode, use `AFL_TMPDIR` to point the input file on a tempfs location, see [docs/env_variables.md](docs/env_variables.md)
+  5. Improve kernel performance: modify `/etc/default/grub`, set `GRUB_CMDLINE_LINUX_DEFAULT="ibpb=off ibrs=off kpti=off l1tf=off mds=off mitigations=off no_stf_barrier noibpb noibrs nopcid nopti nospec_store_bypass_disable nospectre_v1 nospectre_v2 pcid=off pti=off spec_store_bypass_disable=off spectre_v2=off stf_barrier=off"`; then `update-grub` and `reboot` (warning: makes the system more insecure)
+  6. Running on an `ext2` filesystem with `noatime` mount option will be a bit faster than on any other journaling filesystem
+  7. Use your cores! [README.md:3.b) Using multiple cores/threads](../README.md#b-using-multiple-coresthreads)
+
 ## What is an "edge"
 
 A program contains `functions`, `functions` contain the compiled machine code.
diff --git a/docs/binaryonly_fuzzing.md b/docs/binaryonly_fuzzing.md
index 7c9be418..111147e2 100644
--- a/docs/binaryonly_fuzzing.md
+++ b/docs/binaryonly_fuzzing.md
@@ -8,12 +8,17 @@
 
   The following is a description of how these binaries can be fuzzed with afl++
 
+
 ## TL;DR:
 
   qemu_mode in persistent mode is the fastest - if the stability is
   high enough. Otherwise try retrowrite, afl-dyninst and if these
   fail too then standard qemu_mode with AFL_ENTRYPOINT to where you need it.
 
+  If your a target is library use examples/afl_frida/.
+
+  If your target is non-linux then use unicorn_mode/
+
 
 ## QEMU
 
@@ -57,6 +62,20 @@
   As it is included in afl++ this needs no URL.
 
 
+## AFL FRIDA
+
+   If you want to fuzz a binary-only shared library then you can fuzz it with
+   frida-gum via examples/afl_frida/, you will have to write a harness to
+   call the target function in the library, use afl-frida.c as a template.
+
+
+## AFL UNTRACER
+
+   If you want to fuzz a binary-only shared library then you can fuzz it with
+   examples/afl_untracer/, use afl-untracer.c as a template.
+   It is slower than AFL FRIDA (see above).
+
+
 ## DYNINST
 
   Dyninst is a binary instrumentation framework similar to Pintool and
diff --git a/llvm_mode/README.laf-intel.md b/llvm_mode/README.laf-intel.md
index 2fa4bc26..f63ab2bb 100644
--- a/llvm_mode/README.laf-intel.md
+++ b/llvm_mode/README.laf-intel.md
@@ -35,8 +35,8 @@ bit_width may be 64, 32 or 16.
 A new experimental feature is splitting floating point comparisons into a
 series of sign, exponent and mantissa comparisons followed by splitting each
 of them into 8 bit comparisons when necessary.
-It is activated with the `AFL_LLVM_LAF_SPLIT_FLOATS` setting, available only
-when `AFL_LLVM_LAF_SPLIT_COMPARES` is set.
+It is activated with the `AFL_LLVM_LAF_SPLIT_FLOATS` setting.
+Note that setting this automatically activates `AFL_LLVM_LAF_SPLIT_COMPARES`
 
 You can also set `AFL_LLVM_LAF_ALL` and have all of the above enabled :-)
 
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index 4d01e740..dca11bf3 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -268,7 +268,8 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
   }
 
-  if (getenv("LAF_SPLIT_COMPARES") || getenv("AFL_LLVM_LAF_SPLIT_COMPARES")) {
+  if (getenv("LAF_SPLIT_COMPARES") || getenv("AFL_LLVM_LAF_SPLIT_COMPARES") ||
+      getenv("AFL_LLVM_LAF_SPLIT_FLOATS")) {
 
     cc_params[cc_par_cnt++] = "-Xclang";
     cc_params[cc_par_cnt++] = "-load";
-- 
cgit 1.4.1


From ffe5619a9d0934f9088ef32ddbd507a0ddbde321 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Wed, 29 Jul 2020 14:30:22 +0200
Subject: fix snapshot include

---
 README.md              | 11 ++++++-----
 docs/Changelog.md      |  2 ++
 include/snapshot-inl.h |  2 +-
 3 files changed, 9 insertions(+), 6 deletions(-)

(limited to 'docs')

diff --git a/README.md b/README.md
index c6893fa0..d747ea00 100644
--- a/README.md
+++ b/README.md
@@ -272,11 +272,12 @@ afl-clang-lto:
    To use this set the following environment variable before compiling the
    target: `export AFL_LLVM_LAF_ALL=1`
    You can read more about this in [llvm/README.laf-intel.md](llvm/README.laf-intel.md)
- * A different technique is to instrument the target so that any compare values
-   in the target are sent to afl++ which then tries to put this value into the
-   fuzzing data at different locations. This technique is very fast and good -
-   if the target does not transform input data before comparison. Therefore
-   technique is called `input to state` or `redqueen`.
+ * A different technique (and usually a bit better than laf-intel) is to
+   instrument the target so that any compare values in the target are sent to
+   afl++ which then tries to put this value into the fuzzing data at different
+   locations. This technique is very fast and good - if the target does not
+   transform input data before comparison. Therefore this technique is called
+   `input to state` or `redqueen`.
    If you want to use this technique, then you have to compile the target
    twice, once specifically with/for this mode.
    You can read more about this in [llvm_mode/README.cmplog.md](llvm_mode/README.cmplog.md)
diff --git a/docs/Changelog.md b/docs/Changelog.md
index 7efab1e6..1e7a1c1d 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -10,6 +10,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
 
 
 ### Version ++2.66d (devel)
+  - Support for improved afl++ snapshot module:
+    https://github.com/AFLplusplus/AFL-Snapshot-LKM
   - afl-fuzz:
      - added -F option to allow -M main fuzzers to sync to foreign fuzzers,
        e.g. honggfuzz or libfuzzer
diff --git a/include/snapshot-inl.h b/include/snapshot-inl.h
index 263a4b63..a75d69c0 100644
--- a/include/snapshot-inl.h
+++ b/include/snapshot-inl.h
@@ -95,7 +95,7 @@ static int afl_snapshot_take(int config) {
 
 }
 
-static int afl_snapshot_take(void) {
+static int afl_snapshot_do(void) {
 
   return ioctl(afl_snapshot_dev_fd, AFL_SNAPSHOT_IOCTL_DO);
 
-- 
cgit 1.4.1


From 320f26d26f7e0cbe093e6f5af5f27f180bc31a1b Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Thu, 30 Jul 2020 19:00:41 +0200
Subject: add -b option to afl-fuzz

---
 docs/Changelog.md    |  1 +
 include/afl-fuzz.h   |  3 ++-
 src/afl-fuzz-init.c  | 22 +++++++++++++++++-----
 src/afl-fuzz-state.c |  1 +
 src/afl-fuzz.c       | 19 ++++++++++++++++---
 5 files changed, 37 insertions(+), 9 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index 1e7a1c1d..dcaf64a7 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -15,6 +15,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
   - afl-fuzz:
      - added -F option to allow -M main fuzzers to sync to foreign fuzzers,
        e.g. honggfuzz or libfuzzer
+     - added -b option to bind to a specific CPU
      - eliminated CPU affinity race condition for -S/-M runs
      - expanded havoc mode added, on no cycle finds add extra splicing and
        MOpt into the mix
diff --git a/include/afl-fuzz.h b/include/afl-fuzz.h
index 1c1be711..bc3f65b6 100644
--- a/include/afl-fuzz.h
+++ b/include/afl-fuzz.h
@@ -545,7 +545,8 @@ typedef struct afl_state {
   u64 total_bitmap_size,                /* Total bit count for all bitmaps  */
       total_bitmap_entries;             /* Number of bitmaps counted        */
 
-  s32 cpu_core_count;                   /* CPU core count                   */
+  s32 cpu_core_count,                   /* CPU core count                   */
+      cpu_to_bind;                      /* bind to specific CPU             */
 
 #ifdef HAVE_AFFINITY
   s32 cpu_aff;                          /* Selected CPU core                */
diff --git a/src/afl-fuzz-init.c b/src/afl-fuzz-init.c
index 65ad0c9f..ad92dff6 100644
--- a/src/afl-fuzz-init.c
+++ b/src/afl-fuzz-init.c
@@ -53,6 +53,13 @@ void bind_to_free_cpu(afl_state_t *afl) {
   u8  cpu_used[4096] = {0}, lockfile[PATH_MAX] = "";
   u32 i;
 
+  if (afl->cpu_to_bind != -1) {
+
+    i = afl->cpu_to_bind;
+    goto set_cpu;
+
+  }
+
   if (afl->sync_id) {
 
     s32 lockfd, first = 1;
@@ -295,20 +302,23 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
   try:
 
+    if (afl->cpu_to_bind != -1)
+      FATAL("bind to CPU #%d failed!", afl->cpu_to_bind);
+
   #if !defined(__ANDROID__)
 
-    for (i = cpu_start; i < afl->cpu_core_count; i++) {
+  for (i = cpu_start; i < afl->cpu_core_count; i++) {
 
-      if (!cpu_used[i]) { break; }
+    if (!cpu_used[i]) { break; }
 
-    }
+  }
 
   if (i == afl->cpu_core_count) {
 
   #else
 
-    for (i = afl->cpu_core_count - cpu_start - 1; i > -1; i--)
-      if (!cpu_used[i]) break;
+  for (i = afl->cpu_core_count - cpu_start - 1; i > -1; i--)
+    if (!cpu_used[i]) break;
   if (i == -1) {
 
   #endif
@@ -327,6 +337,8 @@ void bind_to_free_cpu(afl_state_t *afl) {
 
   OKF("Found a free CPU core, try binding to #%u.", i);
 
+set_cpu:
+
   afl->cpu_aff = i;
 
   #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
diff --git a/src/afl-fuzz-state.c b/src/afl-fuzz-state.c
index 66280ed1..e2d62bc6 100644
--- a/src/afl-fuzz-state.c
+++ b/src/afl-fuzz-state.c
@@ -94,6 +94,7 @@ void afl_state_init(afl_state_t *afl, uint32_t map_size) {
   afl->havoc_div = 1;                   /* Cycle count divisor for havoc    */
   afl->stage_name = "init";             /* Name of the current fuzz stage   */
   afl->splicing_with = -1;              /* Splicing with which test case?   */
+  afl->cpu_to_bind = -1;
 
 #ifdef HAVE_AFFINITY
   afl->cpu_aff = -1;                    /* Selected CPU core                */
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index 5bedf6e1..e33a4bbd 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -143,6 +143,8 @@ static void usage(afl_state_t *afl, u8 *argv0, int more_help) {
       //"  -B bitmap.txt - mutate a specific test case, use the out/fuzz_bitmap
       //" "file\n"
       "  -C            - crash exploration mode (the peruvian rabbit thing)\n"
+      "  -b cpu_id     - bind the fuzzing process to the specified CPU core "
+      "(0-...)\n"
       "  -e ext        - file extension for the fuzz test input file (if "
       "needed)\n\n",
       argv0, EXEC_TIMEOUT, MEM_LIMIT, FOREIGN_SYNCS_MAX);
@@ -271,9 +273,9 @@ int main(int argc, char **argv_orig, char **envp) {
 
   afl->shmem_testcase_mode = 1;  // we always try to perform shmem fuzzing
 
-  while ((opt = getopt(argc, argv,
-                       "+c:i:I:o:f:F:m:t:T:dDnCB:S:M:x:QNUWe:p:s:V:E:L:hRP:")) >
-         0) {
+  while ((opt = getopt(
+              argc, argv,
+              "+b:c:i:I:o:f:F:m:t:T:dDnCB:S:M:x:QNUWe:p:s:V:E:L:hRP:")) > 0) {
 
     switch (opt) {
 
@@ -281,6 +283,17 @@ int main(int argc, char **argv_orig, char **envp) {
         afl->infoexec = optarg;
         break;
 
+      case 'b': {                                          /* bind CPU core */
+
+        if (afl->cpu_to_bind != -1) FATAL("Multiple -b options not supported");
+
+        if (sscanf(optarg, "%u", &afl->cpu_to_bind) < 0 || optarg[0] == '-')
+          FATAL("Bad syntax used for -b");
+
+        break;
+
+      }
+
       case 'c': {
 
         afl->shm.cmplog_mode = 1;
-- 
cgit 1.4.1


From cd576fa59d1b413433beef1009668f4d9b22c965 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Fri, 31 Jul 2020 10:42:43 +0200
Subject: fixes

---
 docs/binaryonly_fuzzing.md     |   4 ++--
 examples/afl_frida/GNUmakefile |  23 +++++++++++++++++++++++
 examples/afl_frida/Makefile    |  25 ++-----------------------
 examples/defork/forking_target | Bin 19520 -> 0 bytes
 src/afl-fuzz.c                 |   2 ++
 5 files changed, 29 insertions(+), 25 deletions(-)
 create mode 100644 examples/afl_frida/GNUmakefile
 delete mode 100755 examples/defork/forking_target

(limited to 'docs')

diff --git a/docs/binaryonly_fuzzing.md b/docs/binaryonly_fuzzing.md
index 111147e2..a3d3330f 100644
--- a/docs/binaryonly_fuzzing.md
+++ b/docs/binaryonly_fuzzing.md
@@ -15,9 +15,9 @@
   high enough. Otherwise try retrowrite, afl-dyninst and if these
   fail too then standard qemu_mode with AFL_ENTRYPOINT to where you need it.
 
-  If your a target is library use examples/afl_frida/.
+  If your target is a library use examples/afl_frida/.
 
-  If your target is non-linux then use unicorn_mode/
+  If your target is non-linux then use unicorn_mode/.
 
 
 ## QEMU
diff --git a/examples/afl_frida/GNUmakefile b/examples/afl_frida/GNUmakefile
new file mode 100644
index 00000000..c154f3a4
--- /dev/null
+++ b/examples/afl_frida/GNUmakefile
@@ -0,0 +1,23 @@
+ifdef DEBUG
+  OPT=-O0 -D_DEBUG=\"1\"
+else
+  OPT=-O3 -funroll-loops
+endif
+
+all:	afl-frida libtestinstr.so
+
+libfrida-gum.a:
+	@echo Download and extract frida-gum-devkit-VERSION-PLATFORM.tar.xz for your platform from https://github.com/frida/frida/releases/latest
+	@exit 1
+	
+afl-frida:	afl-frida.c libfrida-gum.a
+	$(CC) -g $(OPT) -o afl-frida -Wno-format -Wno-pointer-sign -I. -fpermissive -fPIC afl-frida.c ../../afl-llvm-rt.o libfrida-gum.a -ldl -lresolv -pthread
+
+libtestinstr.so:        libtestinstr.c
+	$(CC) -g -O0 -fPIC -o libtestinstr.so -shared libtestinstr.c
+
+clean:
+	rm -f afl-frida *~ core *.o libtestinstr.so
+
+deepclean: clean
+	rm -f libfrida-gum.a frida-gum*
diff --git a/examples/afl_frida/Makefile b/examples/afl_frida/Makefile
index c154f3a4..0b306dde 100644
--- a/examples/afl_frida/Makefile
+++ b/examples/afl_frida/Makefile
@@ -1,23 +1,2 @@
-ifdef DEBUG
-  OPT=-O0 -D_DEBUG=\"1\"
-else
-  OPT=-O3 -funroll-loops
-endif
-
-all:	afl-frida libtestinstr.so
-
-libfrida-gum.a:
-	@echo Download and extract frida-gum-devkit-VERSION-PLATFORM.tar.xz for your platform from https://github.com/frida/frida/releases/latest
-	@exit 1
-	
-afl-frida:	afl-frida.c libfrida-gum.a
-	$(CC) -g $(OPT) -o afl-frida -Wno-format -Wno-pointer-sign -I. -fpermissive -fPIC afl-frida.c ../../afl-llvm-rt.o libfrida-gum.a -ldl -lresolv -pthread
-
-libtestinstr.so:        libtestinstr.c
-	$(CC) -g -O0 -fPIC -o libtestinstr.so -shared libtestinstr.c
-
-clean:
-	rm -f afl-frida *~ core *.o libtestinstr.so
-
-deepclean: clean
-	rm -f libfrida-gum.a frida-gum*
+all:
+	@echo please use GNU make, thanks!
diff --git a/examples/defork/forking_target b/examples/defork/forking_target
deleted file mode 100755
index 0f7a04fc..00000000
Binary files a/examples/defork/forking_target and /dev/null differ
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index e33a4bbd..54db1efb 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -163,11 +163,13 @@ static void usage(afl_state_t *afl, u8 *argv0, int more_help) {
       "AFL_BENCH_UNTIL_CRASH: exit soon when the first crashing input has been found\n"
       "AFL_CUSTOM_MUTATOR_LIBRARY: lib with afl_custom_fuzz() to mutate inputs\n"
       "AFL_CUSTOM_MUTATOR_ONLY: avoid AFL++'s internal mutators\n"
+      "AFL_CYCLE_SCHEDULES: after completing a cycle, switch to a different -p schedule\n"
       "AFL_DEBUG: extra debugging output for Python mode trimming\n"
       "AFL_DEBUG_CHILD_OUTPUT: do not suppress stdout/stderr from target\n"
       "AFL_DISABLE_TRIM: disable the trimming of test cases\n"
       "AFL_DUMB_FORKSRV: use fork server without feedback from target\n"
       "AFL_EXIT_WHEN_DONE: exit when all inputs are run and no new finds are found\n"
+      "AFL_EXPAND_HAVOC_NOW: immediately enable expand havoc mode (default: after 60 minutes and a cycle without finds)\n"
       "AFL_FAST_CAL: limit the calibration stage to three cycles for speedup\n"
       "AFL_FORCE_UI: force showing the status screen (for virtual consoles)\n"
       "AFL_HANG_TMOUT: override timeout value (in milliseconds)\n"
-- 
cgit 1.4.1


From 185f4436598aacb3f25736ce6eb53309d1d9472f Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Fri, 31 Jul 2020 17:53:01 +0200
Subject: add LTO AFL_LLVM_DOCUMENT_IDS feature

---
 docs/Changelog.md                            |  2 ++
 docs/FAQ.md                                  | 12 +++++-----
 docs/env_variables.md                        | 35 ++++++++++++++++------------
 include/envs.h                               |  1 +
 llvm_mode/README.lto.md                      |  6 +++++
 llvm_mode/afl-clang-fast.c                   |  2 ++
 llvm_mode/afl-llvm-lto-instrumentation.so.cc | 18 ++++++++++++++
 7 files changed, 55 insertions(+), 21 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index dcaf64a7..14d00a43 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -26,6 +26,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - LTO: autodictionary mode is a default
      - LTO: instrim instrumentation disabled, only classic support used
             as it is always better
+     - LTO: env var AFL_LLVM_DOCUMENT_IDS=file will document which edge ID
+            was given to which function during compilation
      - setting AFL_LLVM_LAF_SPLIT_FLOATS now activates
        AFL_LLVM_LAF_SPLIT_COMPARES
   - added honggfuzz mangle as a custom mutator in custom_mutators/honggfuzz
diff --git a/docs/FAQ.md b/docs/FAQ.md
index e09385a8..b09a16ae 100644
--- a/docs/FAQ.md
+++ b/docs/FAQ.md
@@ -95,12 +95,13 @@ afl-clang-fast PCGUARD and afl-clang-lto LTO instrumentation!
 
   2. Second step: Find the responsible function.
 
-     a) For LTO instrumented binaries just disassemble or decompile the target
-        and look which edge is writing to that edge ID. Ghidra is a good tool
-        for this: [https://ghidra-sre.org/](https://ghidra-sre.org/)
+     a) For LTO instrumented binaries this can be documented during compile
+        time, just set `export AFL_LLVM_DOCUMENT_IDS=/path/to/afile`.
+        This file will have one assigned edge ID and the corresponding function
+        per line.
 
-     b) For PCGUARD instrumented binaries it is more difficult. Here you can
-        either modify the __sanitizer_cov_trace_pc_guard function in
+     b) For PCGUARD instrumented binaries it is much more difficult. Here you
+        can either modify the __sanitizer_cov_trace_pc_guard function in
         llvm_mode/afl-llvm-rt.o.c to write a backtrace to a file if the ID in
         __afl_area_ptr[*guard] is one of the unstable edge IDs. Then recompile
         and reinstall llvm_mode and rebuild your target. Run the recompiled
@@ -121,4 +122,3 @@ afl-clang-fast PCGUARD and afl-clang-lto LTO instrumentation!
   4. Fourth step: recompile the target
 
      Recompile, fuzz it, be happy :)
-
diff --git a/docs/env_variables.md b/docs/env_variables.md
index 87344331..4c0d2db7 100644
--- a/docs/env_variables.md
+++ b/docs/env_variables.md
@@ -121,18 +121,16 @@ Then there are a few specific features that are only available in llvm_mode:
     built if LLVM 11 or newer is used.
 
    - AFL_LLVM_INSTRUMENT=CFG will use Control Flow Graph instrumentation.
-     (recommended)
-
-   - AFL_LLVM_LTO_AUTODICTIONARY will generate a dictionary in the target
-     binary based on string compare and memory compare functions.
-     afl-fuzz will automatically get these transmitted when starting to
-     fuzz.
+     (not recommended!)
 
     None of the following options are necessary to be used and are rather for
     manual use (which only ever the author of this LTO implementation will use).
     These are used if several seperated instrumentation are performed which
     are then later combined.
 
+   - AFL_LLVM_DOCUMENT_IDS=file will document to a file which edge ID was given
+     to which function. This helps to identify functions with variable bytes
+     or which functions were touched by an input.
    - AFL_LLVM_MAP_ADDR sets the fixed map address to a different address than
      the default 0x10000. A value of 0 or empty sets the map address to be
      dynamic (the original afl way, which is slower)
@@ -254,15 +252,6 @@ checks or alter some of the more exotic semantics of the tool:
     useful if you can't change the defaults (e.g., no root access to the
     system) and are OK with some performance loss.
 
-  - Setting AFL_NO_FORKSRV disables the forkserver optimization, reverting to
-    fork + execve() call for every tested input. This is useful mostly when
-    working with unruly libraries that create threads or do other crazy
-    things when initializing (before the instrumentation has a chance to run).
-
-    Note that this setting inhibits some of the user-friendly diagnostics
-    normally done when starting up the forkserver and causes a pretty
-    significant performance drop.
-
   - AFL_EXIT_WHEN_DONE causes afl-fuzz to terminate when all existing paths
     have been fuzzed and there were no new finds for a while. This would be
     normally indicated by the cycle counter in the UI turning green. May be
@@ -338,6 +327,13 @@ checks or alter some of the more exotic semantics of the tool:
 
   - In QEMU mode (-Q), AFL_PATH will be searched for afl-qemu-trace.
 
+  - Setting AFL_CYCLE_SCHEDULES will switch to a different schedule everytime
+    a cycle is finished.
+
+  - Setting AFL_EXPAND_HAVOC_NOW will start in the extended havoc mode that
+    includes costly mutations. afl-fuzz automatically enables this mode when
+    deemed useful otherwise.
+
   - Setting AFL_PRELOAD causes AFL to set LD_PRELOAD for the target binary
     without disrupting the afl-fuzz process itself. This is useful, among other
     things, for bootstrapping libdislocator.so.
@@ -365,6 +361,15 @@ checks or alter some of the more exotic semantics of the tool:
     for an existing out folder, even if a different `-i` was provided.
     Without this setting, afl-fuzz will refuse execution for a long-fuzzed out dir.
 
+  - Setting AFL_NO_FORKSRV disables the forkserver optimization, reverting to
+    fork + execve() call for every tested input. This is useful mostly when
+    working with unruly libraries that create threads or do other crazy
+    things when initializing (before the instrumentation has a chance to run).
+
+    Note that this setting inhibits some of the user-friendly diagnostics
+    normally done when starting up the forkserver and causes a pretty
+    significant performance drop.
+
   - Outdated environment variables that are that not supported anymore:
     AFL_DEFER_FORKSRV
     AFL_PERSISTENT
diff --git a/include/envs.h b/include/envs.h
index c1c7d387..7153ed47 100644
--- a/include/envs.h
+++ b/include/envs.h
@@ -65,6 +65,7 @@ static char *afl_environment_variables[] = {
     "AFL_LLVM_CMPLOG",
     "AFL_LLVM_INSTRIM",
     "AFL_LLVM_CTX",
+    "AFL_LLVM_DOCUMENT_IDS",
     "AFL_LLVM_INSTRUMENT",
     "AFL_LLVM_INSTRIM_LOOPHEAD",
     "AFL_LLVM_LTO_AUTODICTIONARY",
diff --git a/llvm_mode/README.lto.md b/llvm_mode/README.lto.md
index a4c969b9..e521ac82 100644
--- a/llvm_mode/README.lto.md
+++ b/llvm_mode/README.lto.md
@@ -140,6 +140,12 @@ to be dynamic - the original afl way, which is slower).
 AFL_LLVM_MAP_DYNAMIC can be set so the shared memory address is dynamic (which
 is safer but also slower).
 
+## Document edge IDs
+
+Setting `export AFL_LLVM_DOCUMENT_IDS=file` will document to a file which edge
+ID was given to which function. This helps to identify functions with variable
+bytes or which functions were touched by an input.
+
 ## Solving difficult targets
 
 Some targets are difficult because the configure script does unusual stuff that
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index dca11bf3..a2550d2c 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -890,6 +890,8 @@ int main(int argc, char **argv, char **envp) {
         "AFL_NO_BUILTIN: compile for use with libtokencap.so\n"
         "AFL_PATH: path to instrumenting pass and runtime "
         "(afl-llvm-rt.*o)\n"
+        "AFL_LLVM_DOCUMENT_IDS: document edge IDs given to which function (LTO "
+        "only)\n"
         "AFL_QUIET: suppress verbose output\n"
         "AFL_USE_ASAN: activate address sanitizer\n"
         "AFL_USE_CFISAN: activate control flow sanitizer\n"
diff --git a/llvm_mode/afl-llvm-lto-instrumentation.so.cc b/llvm_mode/afl-llvm-lto-instrumentation.so.cc
index 3c1d3565..46a97e54 100644
--- a/llvm_mode/afl-llvm-lto-instrumentation.so.cc
+++ b/llvm_mode/afl-llvm-lto-instrumentation.so.cc
@@ -103,6 +103,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
   std::vector<CallInst *>          calls;
   DenseMap<Value *, std::string *> valueMap;
   char *                           ptr;
+  FILE *                           documentFile = NULL;
 
   IntegerType *Int8Ty = IntegerType::getInt8Ty(C);
   IntegerType *Int32Ty = IntegerType::getInt32Ty(C);
@@ -120,6 +121,13 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
     be_quiet = 1;
 
+  if ((ptr = getenv("AFL_LLVM_DOCUMENT_IDS")) != NULL) {
+
+    if ((documentFile = fopen(ptr, "a")) == NULL)
+      WARNF("Cannot access document file %s", ptr);
+
+  }
+
   if (getenv("AFL_LLVM_MAP_DYNAMIC")) map_addr = 0;
 
   if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") ||
@@ -579,6 +587,14 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
           }
 
+          if (documentFile) {
+
+            fprintf(documentFile, "%s %u\n",
+                    origBB->getParent()->getName().str().c_str(),
+                    afl_global_id);
+
+          }
+
           BasicBlock::iterator IP = newBB->getFirstInsertionPt();
           IRBuilder<>          IRB(&(*IP));
 
@@ -632,6 +648,8 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
     }
 
+    if (documentFile) fclose(documentFile);
+
   }
 
   // save highest location ID to global variable
-- 
cgit 1.4.1


From 593940c39a3838b072863b7093ed31f92846cfcb Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Fri, 31 Jul 2020 20:20:30 +0200
Subject: refer to llvm 12 for partial instrumentation for PCGUARD

---
 docs/FAQ.md                         | 3 ++-
 llvm_mode/README.instrument_file.md | 2 ++
 llvm_mode/afl-clang-fast.c          | 5 +++--
 3 files changed, 7 insertions(+), 3 deletions(-)

(limited to 'docs')

diff --git a/docs/FAQ.md b/docs/FAQ.md
index b09a16ae..ee221d02 100644
--- a/docs/FAQ.md
+++ b/docs/FAQ.md
@@ -117,7 +117,8 @@ afl-clang-fast PCGUARD and afl-clang-lto LTO instrumentation!
      remove from instrumentation.
 
      Simply follow this document on how to do this: [llvm_mode/README.instrument_file.md](llvm_mode/README.instrument_file.md)
-     If PCGUARD is used, then you need to follow this guide: [http://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation](http://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation)
+     If PCGUARD is used, then you need to follow this guide (needs llvm 12+!):
+     [http://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation](http://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation)
 
   4. Fourth step: recompile the target
 
diff --git a/llvm_mode/README.instrument_file.md b/llvm_mode/README.instrument_file.md
index 29c40eec..46e45ba2 100644
--- a/llvm_mode/README.instrument_file.md
+++ b/llvm_mode/README.instrument_file.md
@@ -18,6 +18,8 @@ For this purpose, I have added a "partial instrumentation" support to the LLVM
 mode of AFLFuzz that allows you to specify on a source file level which files
 should be compiled with or without instrumentation.
 
+Note: When using PCGUARD mode - and have llvm 12+ - you can use this instead:
+https://clang.llvm.org/docs/SanitizerCoverage.html#partially-disabling-instrumentation
 
 ## 2) Building the LLVM module
 
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index a2550d2c..8e3ca90c 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -776,7 +776,7 @@ int main(int argc, char **argv, char **envp) {
           "switching to classic instrumentation because "
           "AFL_LLVM_INSTRUMENT_FILE does not work with PCGUARD. Use "
           "-fsanitize-coverage-allowlist=allowlist.txt if you want to use "
-          "PCGUARD. See "
+          "PCGUARD. Requires llvm 12+. See "
           "https://clang.llvm.org/docs/"
           "SanitizerCoverage.html#partially-disabling-instrumentation");
 
@@ -832,7 +832,8 @@ int main(int argc, char **argv, char **envp) {
     FATAL(
         "Instrumentation type PCGUARD does not support "
         "AFL_LLVM_INSTRUMENT_FILE! Use "
-        "-fsanitize-coverage-allowlist=allowlist.txt instead, see "
+        "-fsanitize-coverage-allowlist=allowlist.txt instead (requires llvm "
+        "12+), see "
         "https://clang.llvm.org/docs/"
         "SanitizerCoverage.html#partially-disabling-instrumentation");
 
-- 
cgit 1.4.1


From 9439ba1dac174741c7838c17de202b0dc68c6a88 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Sat, 1 Aug 2020 16:32:01 +0200
Subject: document env var

---
 docs/env_variables.md | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'docs')

diff --git a/docs/env_variables.md b/docs/env_variables.md
index 4c0d2db7..811c5658 100644
--- a/docs/env_variables.md
+++ b/docs/env_variables.md
@@ -262,6 +262,9 @@ checks or alter some of the more exotic semantics of the tool:
     the target. This must be equal or larger than the size the target was
     compiled with.
 
+  - Setting AFL_DISABLE_TRIM tells afl-fuzz to no trim test cases. This is
+    usually a bad idea!
+
   - Setting AFL_NO_AFFINITY disables attempts to bind to a specific CPU core
     on Linux systems. This slows things down, but lets you run more instances
     of afl-fuzz than would be prudent (if you really want to).
-- 
cgit 1.4.1


From b708cf7d45edd0297ff47b89dd95dcf5e3664a40 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Sat, 1 Aug 2020 19:43:29 +0200
Subject: fix lto single block and no zero

---
 docs/Changelog.md                              |  2 ++
 examples/persistent_demo/persistent_demo_new.c |  9 +++++---
 llvm_mode/afl-clang-fast.c                     | 13 ++++++-----
 llvm_mode/afl-llvm-lto-instrim.so.cc           |  2 +-
 llvm_mode/afl-llvm-lto-instrumentation.so.cc   | 30 ++++++++++++++++++--------
 5 files changed, 36 insertions(+), 20 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index 14d00a43..8ab3fdf4 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -28,6 +28,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
             as it is always better
      - LTO: env var AFL_LLVM_DOCUMENT_IDS=file will document which edge ID
             was given to which function during compilation
+     - LTO: single block functions were not implemented by default, fixed
+     - LTO: AFL_LLVM_SKIP_NEVERZERO behaviour was inversed, fixed
      - setting AFL_LLVM_LAF_SPLIT_FLOATS now activates
        AFL_LLVM_LAF_SPLIT_COMPARES
   - added honggfuzz mangle as a custom mutator in custom_mutators/honggfuzz
diff --git a/examples/persistent_demo/persistent_demo_new.c b/examples/persistent_demo/persistent_demo_new.c
index 86b19fa8..5f347667 100644
--- a/examples/persistent_demo/persistent_demo_new.c
+++ b/examples/persistent_demo/persistent_demo_new.c
@@ -30,13 +30,16 @@
 
 /* this lets the source compile without afl-clang-fast/lto */
 #ifndef __AFL_FUZZ_TESTCASE_LEN
-  ssize_t fuzz_len;
-  #define __AFL_FUZZ_TESTCASE_LEN fuzz_len
+
+  ssize_t       fuzz_len;
   unsigned char fuzz_buf[1024000];
+
+  #define __AFL_FUZZ_TESTCASE_LEN fuzz_len
   #define __AFL_FUZZ_TESTCASE_BUF fuzz_buf
   #define __AFL_FUZZ_INIT() void sync(void);
   #define __AFL_LOOP(x) ((fuzz_len = read(0, fuzz_buf, sizeof(fuzz_buf))) > 0 ?
-  #define __AFL_INIT() sync() 
+  #define __AFL_INIT() sync()
+
 #endif
 
 __AFL_FUZZ_INIT();
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index b819b43a..57330395 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -162,7 +162,7 @@ static void find_obj(u8 *argv0) {
 static void edit_params(u32 argc, char **argv, char **envp) {
 
   u8  fortify_set = 0, asan_set = 0, x_set = 0, bit_mode = 0;
-  u8  have_pic = 0, have_s = 0, have_c = 0, have_shared = 0;
+  u8  have_pic = 0;
   u8 *name;
 
   cc_params = ck_alloc((argc + 128) * sizeof(u8 *));
@@ -369,15 +369,11 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
     for (idx = 1; idx < argc; idx++) {
 
-      if (!strncmp(argv[idx], "-shared", 7)) have_shared = 1;
-      if (!strcmp(argv[idx], "-S")) have_s = 1;
-      if (!strcmp(argv[idx], "-c")) have_c = 1;
       if (!strncasecmp(argv[idx], "-fpic", 5)) have_pic = 1;
 
     }
 
     if (!have_pic) cc_params[cc_par_cnt++] = "-fPIC";
-    // if (!have_shared && (have_s || have_c)) cc_params[cc_par_cnt++] = "-shared";
 
   }
 
@@ -527,9 +523,12 @@ static void edit_params(u32 argc, char **argv, char **envp) {
       "unsigned char __afl_fuzz_alt[1024000];"
       "unsigned char *__afl_fuzz_alt_ptr = __afl_fuzz_alt;";
   cc_params[cc_par_cnt++] =
-      "-D__AFL_FUZZ_TESTCASE_BUF=(__afl_fuzz_ptr ? __afl_fuzz_ptr : __afl_fuzz_alt_ptr)";
+      "-D__AFL_FUZZ_TESTCASE_BUF=(__afl_fuzz_ptr ? __afl_fuzz_ptr : "
+      "__afl_fuzz_alt_ptr)";
   cc_params[cc_par_cnt++] =
-      "-D__AFL_FUZZ_TESTCASE_LEN=(__afl_fuzz_ptr ? *__afl_fuzz_len : (*__afl_fuzz_len = read(0, __afl_fuzz_alt_ptr, 1024000)) == 0xffffffff ? 0 : *__afl_fuzz_len)";
+      "-D__AFL_FUZZ_TESTCASE_LEN=(__afl_fuzz_ptr ? *__afl_fuzz_len : "
+      "(*__afl_fuzz_len = read(0, __afl_fuzz_alt_ptr, 1024000)) == 0xffffffff "
+      "? 0 : *__afl_fuzz_len)";
 
   cc_params[cc_par_cnt++] =
       "-D__AFL_LOOP(_A)="
diff --git a/llvm_mode/afl-llvm-lto-instrim.so.cc b/llvm_mode/afl-llvm-lto-instrim.so.cc
index 880963ac..dba98777 100644
--- a/llvm_mode/afl-llvm-lto-instrim.so.cc
+++ b/llvm_mode/afl-llvm-lto-instrim.so.cc
@@ -701,7 +701,7 @@ struct InsTrimLTO : public ModulePass {
 
         Value *Incr = IRB.CreateAdd(Counter, One);
 
-        if (skip_nozero) {
+        if (skip_nozero == NULL) {
 
           auto cf = IRB.CreateICmpEQ(Incr, Zero);
           auto carry = IRB.CreateZExt(cf, Int8Ty);
diff --git a/llvm_mode/afl-llvm-lto-instrumentation.so.cc b/llvm_mode/afl-llvm-lto-instrumentation.so.cc
index 46a97e54..430cb0ad 100644
--- a/llvm_mode/afl-llvm-lto-instrumentation.so.cc
+++ b/llvm_mode/afl-llvm-lto-instrumentation.so.cc
@@ -130,9 +130,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
   if (getenv("AFL_LLVM_MAP_DYNAMIC")) map_addr = 0;
 
-  if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") ||
-      getenv("AFL_LLVM_SKIPSINGLEBLOCK"))
-    function_minimum_size = 2;
+  if (getenv("AFL_LLVM_SKIPSINGLEBLOCK")) function_minimum_size = 2;
 
   if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) {
 
@@ -540,6 +538,8 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
       uint32_t succ = 0;
 
+      if (F.size() == 1) InsBlocks.push_back(&BB);
+
       for (succ_iterator SI = succ_begin(&BB), SE = succ_end(&BB); SI != SE;
            ++SI)
         if ((*SI)->size() > 0) succ++;
@@ -558,9 +558,12 @@ bool AFLLTOPass::runOnModule(Module &M) {
       do {
 
         --i;
+        BasicBlock *              newBB;
         BasicBlock *              origBB = &(*InsBlocks[i]);
         std::vector<BasicBlock *> Successors;
         Instruction *             TI = origBB->getTerminator();
+        uint32_t                  fs = origBB->getParent()->size();
+        uint32_t                  countto;
 
         for (succ_iterator SI = succ_begin(origBB), SE = succ_end(origBB);
              SI != SE; ++SI) {
@@ -570,15 +573,25 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
         }
 
-        if (TI == NULL || TI->getNumSuccessors() < 2) continue;
+        if (fs == 1) {
+
+          newBB = origBB;
+          countto = 1;
+
+        } else {
+
+          if (TI == NULL || TI->getNumSuccessors() < 2) continue;
+          countto = Successors.size();
+
+        }
 
         // if (Successors.size() != TI->getNumSuccessors())
         //  FATAL("Different successor numbers %lu <-> %u\n", Successors.size(),
         //        TI->getNumSuccessors());
 
-        for (uint32_t j = 0; j < Successors.size(); j++) {
+        for (uint32_t j = 0; j < countto; j++) {
 
-          BasicBlock *newBB = llvm::SplitEdge(origBB, Successors[j]);
+          if (fs != 1) newBB = llvm::SplitEdge(origBB, Successors[j]);
 
           if (!newBB) {
 
@@ -589,8 +602,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
           if (documentFile) {
 
-            fprintf(documentFile, "%s %u\n",
-                    origBB->getParent()->getName().str().c_str(),
+            fprintf(documentFile, "%s %u\n", F.getName().str().c_str(),
                     afl_global_id);
 
           }
@@ -627,7 +639,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
 
           Value *Incr = IRB.CreateAdd(Counter, One);
 
-          if (skip_nozero) {
+          if (skip_nozero == NULL) {
 
             auto cf = IRB.CreateICmpEQ(Incr, Zero);
             auto carry = IRB.CreateZExt(cf, Int8Ty);
-- 
cgit 1.4.1


From e0d1529061a5de9d32066c05f8faedac65b29ea5 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Mon, 3 Aug 2020 10:03:45 +0200
Subject: edge id documentation example for sancov

---
 docs/FAQ.md               |  9 +++++----
 llvm_mode/afl-llvm-rt.o.c | 21 +++++++++++++++++++++
 2 files changed, 26 insertions(+), 4 deletions(-)

(limited to 'docs')

diff --git a/docs/FAQ.md b/docs/FAQ.md
index ee221d02..c15cd484 100644
--- a/docs/FAQ.md
+++ b/docs/FAQ.md
@@ -103,10 +103,11 @@ afl-clang-fast PCGUARD and afl-clang-lto LTO instrumentation!
      b) For PCGUARD instrumented binaries it is much more difficult. Here you
         can either modify the __sanitizer_cov_trace_pc_guard function in
         llvm_mode/afl-llvm-rt.o.c to write a backtrace to a file if the ID in
-        __afl_area_ptr[*guard] is one of the unstable edge IDs. Then recompile
-        and reinstall llvm_mode and rebuild your target. Run the recompiled
-	target with afl-fuzz for a while and then check the file that you
-        wrote with the backtrace information.
+        __afl_area_ptr[*guard] is one of the unstable edge IDs.
+        (Example code is already there).
+        Then recompile and reinstall llvm_mode and rebuild your target.
+        Run the recompiled target with afl-fuzz for a while and then check the
+        file that you wrote with the backtrace information.
         Alternatively you can use `gdb` to hook __sanitizer_cov_trace_pc_guard_init
         on start, check to which memory address the edge ID value is written
         and set a write breakpoint to that address (`watch 0x.....`).
diff --git a/llvm_mode/afl-llvm-rt.o.c b/llvm_mode/afl-llvm-rt.o.c
index c0ed1bcf..c2859d9c 100644
--- a/llvm_mode/afl-llvm-rt.o.c
+++ b/llvm_mode/afl-llvm-rt.o.c
@@ -859,6 +859,27 @@ __attribute__((constructor(CONST_PRIO))) void __afl_auto_init(void) {
 
 void __sanitizer_cov_trace_pc_guard(uint32_t *guard) {
 
+ // For stability analysis, if you want to know to which function unstable
+ // edge IDs belong to - uncomment, recompile+install llvm_mode, recompile
+ // the target. libunwind and libbacktrace are better solutions.
+ // Set AFL_DEBUG_CHILD_OUTPUT=1 and run afl-fuzz with 2>file to capture
+ // the backtrace output
+ /*
+ uint32_t unstable[] = { ... unstable edge IDs };
+ uint32_t idx;
+ char bt[1024];
+ for (idx = 0; i < sizeof(unstable)/sizeof(uint32_t); i++) {
+   if (unstable[idx] == __afl_area_ptr[*guard]) {
+     int bt_size = backtrace(bt, 256);
+     if (bt_size > 0) {
+       char **bt_syms = backtrace_symbols(bt, bt_size);
+       if (bt_syms)
+         fprintf(stderr, "DEBUG: edge=%u caller=%s\n", unstable[idx], bt_syms[0]);
+     }
+   }
+ }
+ */
+
   __afl_area_ptr[*guard]++;
 
 }
-- 
cgit 1.4.1


From 409e4ae945ab5aeb31b1e3a1497ce5fc65226f07 Mon Sep 17 00:00:00 2001
From: van Hauser <vh@thc.org>
Date: Mon, 3 Aug 2020 13:13:32 +0200
Subject: fix expand havoc for ..._only modes

---
 docs/Changelog.md                              |  1 +
 examples/persistent_demo/persistent_demo_new.c |  4 +--
 llvm_mode/afl-llvm-rt.o.c                      | 48 +++++++++++++++-----------
 src/afl-fuzz-redqueen.c                        |  8 ++---
 src/afl-fuzz.c                                 |  3 +-
 test/test-cmplog.c                             | 22 +++++-------
 6 files changed, 46 insertions(+), 40 deletions(-)

(limited to 'docs')

diff --git a/docs/Changelog.md b/docs/Changelog.md
index 8ab3fdf4..ae7377f2 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -19,6 +19,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
      - eliminated CPU affinity race condition for -S/-M runs
      - expanded havoc mode added, on no cycle finds add extra splicing and
        MOpt into the mix
+     - fixed a bug in redqueen for strings
   - llvm_mode:
      - now supports llvm 12!
      - fixes for laf-intel float splitting (thanks to mark-griffin for
diff --git a/examples/persistent_demo/persistent_demo_new.c b/examples/persistent_demo/persistent_demo_new.c
index 5f347667..7f878c0c 100644
--- a/examples/persistent_demo/persistent_demo_new.c
+++ b/examples/persistent_demo/persistent_demo_new.c
@@ -31,8 +31,8 @@
 /* this lets the source compile without afl-clang-fast/lto */
 #ifndef __AFL_FUZZ_TESTCASE_LEN
 
-  ssize_t       fuzz_len;
-  unsigned char fuzz_buf[1024000];
+ssize_t       fuzz_len;
+unsigned char fuzz_buf[1024000];
 
   #define __AFL_FUZZ_TESTCASE_LEN fuzz_len
   #define __AFL_FUZZ_TESTCASE_BUF fuzz_buf
diff --git a/llvm_mode/afl-llvm-rt.o.c b/llvm_mode/afl-llvm-rt.o.c
index c2859d9c..88abcbe0 100644
--- a/llvm_mode/afl-llvm-rt.o.c
+++ b/llvm_mode/afl-llvm-rt.o.c
@@ -859,26 +859,34 @@ __attribute__((constructor(CONST_PRIO))) void __afl_auto_init(void) {
 
 void __sanitizer_cov_trace_pc_guard(uint32_t *guard) {
 
- // For stability analysis, if you want to know to which function unstable
- // edge IDs belong to - uncomment, recompile+install llvm_mode, recompile
- // the target. libunwind and libbacktrace are better solutions.
- // Set AFL_DEBUG_CHILD_OUTPUT=1 and run afl-fuzz with 2>file to capture
- // the backtrace output
- /*
- uint32_t unstable[] = { ... unstable edge IDs };
- uint32_t idx;
- char bt[1024];
- for (idx = 0; i < sizeof(unstable)/sizeof(uint32_t); i++) {
-   if (unstable[idx] == __afl_area_ptr[*guard]) {
-     int bt_size = backtrace(bt, 256);
-     if (bt_size > 0) {
-       char **bt_syms = backtrace_symbols(bt, bt_size);
-       if (bt_syms)
-         fprintf(stderr, "DEBUG: edge=%u caller=%s\n", unstable[idx], bt_syms[0]);
-     }
-   }
- }
- */
+  // For stability analysis, if you want to know to which function unstable
+  // edge IDs belong to - uncomment, recompile+install llvm_mode, recompile
+  // the target. libunwind and libbacktrace are better solutions.
+  // Set AFL_DEBUG_CHILD_OUTPUT=1 and run afl-fuzz with 2>file to capture
+  // the backtrace output
+  /*
+  uint32_t unstable[] = { ... unstable edge IDs };
+  uint32_t idx;
+  char bt[1024];
+  for (idx = 0; i < sizeof(unstable)/sizeof(uint32_t); i++) {
+
+    if (unstable[idx] == __afl_area_ptr[*guard]) {
+
+      int bt_size = backtrace(bt, 256);
+      if (bt_size > 0) {
+
+        char **bt_syms = backtrace_symbols(bt, bt_size);
+        if (bt_syms)
+          fprintf(stderr, "DEBUG: edge=%u caller=%s\n", unstable[idx],
+  bt_syms[0]);
+
+      }
+
+    }
+
+  }
+
+  */
 
   __afl_area_ptr[*guard]++;
 
diff --git a/src/afl-fuzz-redqueen.c b/src/afl-fuzz-redqueen.c
index b58c8537..cb4c78df 100644
--- a/src/afl-fuzz-redqueen.c
+++ b/src/afl-fuzz-redqueen.c
@@ -673,15 +673,15 @@ static u8 rtn_extend_encoding(afl_state_t *afl, struct cmp_header *h,
 
   for (i = 0; i < its_len; ++i) {
 
-    if (pattern[i] != buf[idx + i] ||
-        o_pattern[i] != orig_buf[idx + i] || *status == 1) {
+    if (pattern[i] != buf[idx + i] || o_pattern[i] != orig_buf[idx + i] ||
+        *status == 1) {
 
       break;
 
     }
 
     buf[idx + i] = repl[i];
-    
+
     if (unlikely(its_fuzz(afl, buf, len, status))) { return 1; }
 
   }
@@ -727,7 +727,7 @@ static u8 rtn_fuzz(afl_state_t *afl, u32 key, u8 *orig_buf, u8 *buf, u32 len) {
     }
 
     for (idx = 0; idx < len && fails < 8; ++idx) {
-    
+
       if (unlikely(rtn_extend_encoding(afl, h, o->v0, o->v1, orig_o->v0, idx,
                                        orig_buf, buf, len, &status))) {
 
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index 326ccc1c..da30797c 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -1304,7 +1304,8 @@ int main(int argc, char **argv_orig, char **envp) {
               afl->expand_havoc = 1;
               break;
             case 1:
-              if (afl->limit_time_sig == 0) {
+              if (afl->limit_time_sig == 0 && !afl->custom_only &&
+                  !afl->python_only) {
 
                 afl->limit_time_sig = -1;
                 afl->limit_time_puppet = 0;
diff --git a/test/test-cmplog.c b/test/test-cmplog.c
index 75efd887..b077e3ab 100644
--- a/test/test-cmplog.c
+++ b/test/test-cmplog.c
@@ -5,23 +5,19 @@
 #include <stdint.h>
 #include <unistd.h>
 int main(int argc, char *argv[]) {
-  char buf[1024];
+
+  char    buf[1024];
   ssize_t i;
-  if ((i = read(0, buf, sizeof(buf) - 1)) < 24)
-    return 0;
+  if ((i = read(0, buf, sizeof(buf) - 1)) < 24) return 0;
   buf[i] = 0;
-  if (buf[0] != 'A')
-    return 0;
-  if (buf[1] != 'B')
-    return 0;
-  if (buf[2] != 'C')
-    return 0;
-  if (buf[3] != 'D')
-    return 0;
-  if (memcmp(buf + 4, "1234", 4) || memcmp(buf + 8, "EFGH", 4))
-    return 0;
+  if (buf[0] != 'A') return 0;
+  if (buf[1] != 'B') return 0;
+  if (buf[2] != 'C') return 0;
+  if (buf[3] != 'D') return 0;
+  if (memcmp(buf + 4, "1234", 4) || memcmp(buf + 8, "EFGH", 4)) return 0;
   if (strncmp(buf + 12, "IJKL", 4) == 0 && strcmp(buf + 16, "DEADBEEF") == 0)
     abort();
   return 0;
+
 }
 
-- 
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