diff options
| author | vanhauser-thc <vh@thc.org> | 2022-02-08 20:36:06 +0100 |
|---|---|---|
| committer | vanhauser-thc <vh@thc.org> | 2022-02-08 20:36:06 +0100 |
| commit | 056ebbff15bb6ebef6664776dee05217cebdc7fe (patch) | |
| tree | 5b413281a88e52722571474a6cc3cf6491f7c294 /instrumentation | |
| parent | cf853fb2494912a1c4b531ffcf302843266639b7 (diff) | |
| download | afl++-056ebbff15bb6ebef6664776dee05217cebdc7fe.tar.gz | |
add AFL_EARLY_FORKSERVER support
Diffstat (limited to 'instrumentation')
| -rw-r--r-- | instrumentation/afl-compiler-rt.o.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/instrumentation/afl-compiler-rt.o.c b/instrumentation/afl-compiler-rt.o.c index 9a12831e..db7ac7b0 100644 --- a/instrumentation/afl-compiler-rt.o.c +++ b/instrumentation/afl-compiler-rt.o.c @@ -68,6 +68,7 @@ #endif #define CTOR_PRIO 3 +#define EARLY_FS_PRIO 5 #include <sys/mman.h> #include <fcntl.h> @@ -145,6 +146,7 @@ u32 __afl_already_initialized_shm; u32 __afl_already_initialized_forkserver; u32 __afl_already_initialized_first; u32 __afl_already_initialized_second; +u32 __afl_already_initialized_init; /* Dummy pipe for area_is_valid() */ @@ -1253,6 +1255,8 @@ void __afl_manual_init(void) { __attribute__((constructor())) void __afl_auto_init(void) { + if (__afl_already_initialized_init) { return; } + #ifdef __ANDROID__ // Disable handlers in linker/debuggerd, check include/debuggerd/handler.h signal(SIGABRT, SIG_DFL); @@ -1265,6 +1269,8 @@ __attribute__((constructor())) void __afl_auto_init(void) { signal(SIGTRAP, SIG_DFL); #endif + __afl_already_initialized_init = 1; + if (getenv("AFL_DISABLE_LLVM_INSTRUMENTATION")) return; if (getenv(DEFER_ENV_VAR)) return; @@ -1273,6 +1279,14 @@ __attribute__((constructor())) void __afl_auto_init(void) { } +/* Optionally run an early forkserver */ + +__attribute__((constructor(EARLY_FS_PRIO))) void __early_forkserver(void) { + + if (getenv("AFL_EARLY_FORKSERVER")) { __afl_auto_init(); } + +} + /* Initialization of the shmem - earliest possible because of LTO fixed mem. */ __attribute__((constructor(CTOR_PRIO))) void __afl_auto_early(void) { |