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Diffstat (limited to 'docs/env_variables.md')
| -rw-r--r-- | docs/env_variables.md | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/docs/env_variables.md b/docs/env_variables.md index 6fb687e2..5362f713 100644 --- a/docs/env_variables.md +++ b/docs/env_variables.md @@ -95,21 +95,22 @@ fairly broad use of environment variables instead: - Setting `AFL_QUIET` will prevent afl-cc and afl-as banners from being displayed during compilation, in case you find them distracting. - - Setting `AFL_USE_ASAN` automatically enables ASAN, provided that your - compiler supports it. - - (You can also enable MSAN via `AFL_USE_MSAN`; ASAN and MSAN come with the - same gotchas; the modes are mutually exclusive. UBSAN can be enabled - similarly by setting the environment variable `AFL_USE_UBSAN=1`. Finally, - there is the Control Flow Integrity sanitizer that can be activated by - `AFL_USE_CFISAN=1`.) - - - Setting `AFL_USE_LSAN` automatically enables Leak-Sanitizer, provided that - your compiler supports it. To perform a leak check within your program at a - certain point (such as at the end of an __AFL_LOOP), you can run the macro - __AFL_LEAK_CHECK(); which will cause an abort if any memory is leaked (you - can combine this with the LSAN_OPTIONS=suppressions option to supress some - known leaks). + - Setting `AFL_USE_...` automatically enables supported sanitizers - + provided that your compiler supports it. + Available are: + - `AFL_USE_ASAN=1` - activate the address sanitizer (memory corruption + detection) + - `AFL_USE_MSAN=1` - activate the memory sanitizer (uninitialized memory) + - `AFL_USE_UBSAN=1` - activate the undefined behaviour sanitizer + - `AFL_USE_TSAN=1` - activate the thread sanitizer to find thread race + conditions + - `AFL_USE_CFISAN=1` - activate the Control Flow Integrity sanitizer (e.g. + type confusion vulnerabilities) + - `AFL_USE_LSAN` - activates the leak sanitizer. To perform a leak check + within your program at a certain point (such as at the end of an + `__AFL_LOOP()`), you can run the macro `__AFL_LEAK_CHECK();` which will + cause an abort if any memory is leaked (you can combine this with the + `LSAN_OPTIONS=...` suppression option to supress some known leaks). - `TMPDIR` is used by afl-as for temporary files; if this variable is not set, the tool defaults to /tmp. |