diff options
| -rw-r--r-- | GNUmakefile | 4 | ||||
| -rw-r--r-- | src/afl-cc.c | 7 | ||||
| -rw-r--r-- | utils/dynamic_covfilter/README.md | 7 |
3 files changed, 16 insertions, 2 deletions
diff --git a/GNUmakefile b/GNUmakefile index b67f9c15..be5b8146 100644 --- a/GNUmakefile +++ b/GNUmakefile @@ -66,6 +66,10 @@ ifdef MSAN_BUILD override LDFLAGS += -fsanitize=memory endif +ifdef CODE_COVERAGE + override CFLAGS += -D__AFL_CODE_COVERAGE=1 +endif + ifeq "$(findstring android, $(shell $(CC) --version 2>/dev/null))" "" ifeq "$(shell echo 'int main() {return 0; }' | $(CC) $(CFLAGS) -Werror -x c - -flto=full -o .test 2>/dev/null && echo 1 || echo 0 ; rm -f .test )" "1" CFLAGS_FLTO ?= -flto=full diff --git a/src/afl-cc.c b/src/afl-cc.c index 73487188..d11419b0 100644 --- a/src/afl-cc.c +++ b/src/afl-cc.c @@ -1521,7 +1521,7 @@ void add_defs_persistent_mode(aflcc_state_t *aflcc) { "({ static volatile const char *_B __attribute__((used,unused)); " " _B = (const char*)\"" PERSIST_SIG "\"; " - "extern int __afl_connected;" + "extern __attribute__((visibility(\"default\"))) int __afl_connected;" #ifdef __APPLE__ "__attribute__((visibility(\"default\"))) " "int _L(unsigned int) __asm__(\"___afl_persistent_loop\"); " @@ -2311,6 +2311,11 @@ void add_runtime(aflcc_state_t *aflcc) { } + #if __AFL_CODE_COVERAGE + // Required for dladdr used in afl-compiler-rt.o + insert_param(aflcc, "-ldl"); + #endif + #if !defined(__APPLE__) && !defined(__sun) if (!aflcc->shared_linking && !aflcc->partial_linking) insert_object(aflcc, "dynamic_list.txt", "-Wl,--dynamic-list=%s", 0); diff --git a/utils/dynamic_covfilter/README.md b/utils/dynamic_covfilter/README.md index a64836f1..381e0855 100644 --- a/utils/dynamic_covfilter/README.md +++ b/utils/dynamic_covfilter/README.md @@ -7,7 +7,12 @@ where doing this dynamically without requiring a new build can be beneficial. Especially when dealing with larger builds, it is much more convenient to select the target code locations at runtime instead of doing so at build time. -There are two ways of doing this in AFL++: +There are two ways of doing this in AFL++. Both approaches require a build of +AFL++ with `CODE_COVERAGE=1`, so make sure to build AFL++ first by invoking + +`CODE_COVERAGE=1 make` + +Once you have built AFL++, you can choose out of two approaches: ## Simple Selection with `AFL_PC_FILTER` |