diff options
| -rw-r--r-- | CMakeLists.txt | 10 | ||||
| -rw-r--r-- | fuzzpuzz.c | 43 |
2 files changed, 53 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 0937d25..ceb4756 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -282,6 +282,16 @@ if(build_cli_programs) cliprogram(fuzzpuzz fuzzpuzz.c list.c ${puzzle_sources} COMPILE_DEFINITIONS COMBINED $<$<BOOL:${HAVE_HF_ITER}>:HAVE_HF_ITER>) target_include_directories(fuzzpuzz PRIVATE ${generated_include_dir}) + + if(CMAKE_C_COMPILER_ID MATCHES "Clang") + cliprogram(fuzzpuzz-libfuzzer fuzzpuzz.c list.c ${puzzle_sources} + COMPILE_DEFINITIONS COMBINED OMIT_MAIN) + target_include_directories(fuzzpuzz-libfuzzer + PRIVATE ${generated_include_dir}) + target_compile_options(fuzzpuzz-libfuzzer PRIVATE -fsanitize=fuzzer) + set_target_properties(fuzzpuzz-libfuzzer + PROPERTIES LINK_FLAGS -fsanitize=fuzzer) + endif() endif() build_extras() @@ -43,6 +43,10 @@ __AFL_FUZZ_INIT(); extern int HF_ITER(unsigned char **, size_t *); #endif +/* This function is expected by libFuzzer. */ + +int LLVMFuzzerTestOneInput(unsigned char *data, size_t size); + static const char *fuzz_one(bool (*readfn)(void *, void *, int), void *rctx, void (*rewindfn)(void *), void (*writefn)(void *, const void *, int), @@ -104,6 +108,44 @@ static void savefile_write(void *wctx, const void *buf, int len) fwrite(buf, 1, len, fp); } +struct memread { + const unsigned char *buf; + size_t pos; + size_t len; +}; + +static bool mem_read(void *wctx, void *buf, int len) +{ + struct memread *ctx = wctx; + + if (ctx->pos + len > ctx->len) return false; + memcpy(buf, ctx->buf + ctx->pos, len); + ctx->pos += len; + return true; +} + +static void mem_rewind(void *wctx) +{ + struct memread *ctx = wctx; + + ctx->pos = 0; +} + +static void null_write(void *wctx, const void *buf, int len) +{ +} + +int LLVMFuzzerTestOneInput(unsigned char *data, size_t size) { + struct memread ctx; + + ctx.buf = data; + ctx.len = size; + ctx.pos = 0; + fuzz_one(mem_read, &ctx, mem_rewind, null_write, NULL); + return 0; +} + +#ifndef OMIT_MAIN int main(int argc, char **argv) { const char *err; @@ -165,3 +207,4 @@ int main(int argc, char **argv) } return ret; } +#endif |