4 files changed, 74 insertions, 1 deletions
diff --git a/examples/persistent_demo/Makefile b/examples/persistent_demo/Makefile
index cbbb7239..6fa1c30e 100644
--- a/examples/persistent_demo/Makefile
+++ b/examples/persistent_demo/Makefile
@@ -1,6 +1,10 @@
 all:
 	afl-clang-fast -o persistent_demo persistent_demo.c
 	afl-clang-fast -o persistent_demo_new persistent_demo_new.c
+	AFL_DONT_OPTIMIZE=1 afl-clang-fast -o test-instr test-instr.c
+
+document:
+	AFL_DONT_OPTIMIZE=1 afl-clang-fast -D_AFL_DOCUMENT_MUTATIONS -o test-instr test-instr.c
 
 clean:
-	rm -f persistent_demo persistent_demo_new
+	rm -f persistent_demo persistent_demo_new test-instr
diff --git a/examples/persistent_demo/persistent_demo.c b/examples/persistent_demo/persistent_demo.c
index 2da49bb0..4cedc32c 100644
--- a/examples/persistent_demo/persistent_demo.c
+++ b/examples/persistent_demo/persistent_demo.c
@@ -41,6 +41,7 @@ int main(int argc, char **argv) {
      terminate normally. This limits the impact of accidental memory leaks
      and similar hiccups. */
 
+  __AFL_INIT();
   while (__AFL_LOOP(1000)) {
 
     /*** PLACEHOLDER CODE ***/
diff --git a/examples/persistent_demo/persistent_demo_new.c b/examples/persistent_demo/persistent_demo_new.c
index 36411e13..69468bdd 100644
--- a/examples/persistent_demo/persistent_demo_new.c
+++ b/examples/persistent_demo/persistent_demo_new.c
@@ -42,6 +42,7 @@ int main(int argc, char **argv) {
      terminate normally. This limits the impact of accidental memory leaks
      and similar hiccups. */
 
+  __AFL_INIT();
   buf = __AFL_FUZZ_TESTCASE_BUF;
 
   while (__AFL_LOOP(1000)) {
diff --git a/examples/persistent_demo/test-instr.c b/examples/persistent_demo/test-instr.c
new file mode 100644
index 00000000..4cd07102
--- /dev/null
+++ b/examples/persistent_demo/test-instr.c
@@ -0,0 +1,67 @@
+/*
+   american fuzzy lop++ - a trivial program to test the build
+   --------------------------------------------------------
+   Originally written by Michal Zalewski
+   Copyright 2014 Google Inc. All rights reserved.
+   Copyright 2019-2020 AFLplusplus Project. 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
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+__AFL_FUZZ_INIT();
+
+int main(int argc, char **argv) {
+
+  __AFL_INIT();
+  unsigned char *buf = __AFL_FUZZ_TESTCASE_BUF;
+
+  while (__AFL_LOOP(2147483647)) {
+
+    unsigned int len = __AFL_FUZZ_TESTCASE_LEN;
+
+#ifdef _AFL_DOCUMENT_MUTATIONS
+    static unsigned int counter = 0;
+    char                fn[32];
+    sprintf(fn, "%09u:test-instr", counter);
+    int fd_doc = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+    if (fd_doc >= 0) {
+
+      if (write(fd_doc, buf, len) != __afl_fuzz_len) {
+
+        fprintf(stderr, "write of mutation file failed: %s\n", fn);
+        unlink(fn);
+
+      }
+
+      close(fd_doc);
+
+    }
+
+    counter++;
+#endif
+
+    if (!len) continue;
+
+    if (buf[0] == '0')
+      printf("Looks like a zero to me!\n");
+    else if (buf[0] == '1')
+      printf("Pretty sure that is a one!\n");
+    else
+      printf("Neither one or zero? How quaint!\n");
+
+  }
+
+  return 0;
+
+}
+