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add env info to afl-fuzz (please review!), small clarifications in docs/env_variables.md

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hexcoder-
2020-02-28 22:02:55 +01:00
parent 0b21441590
commit 6e08be1d0b
3 changed files with 53 additions and 8 deletions
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42
src/afl-fuzz.c
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@ -143,9 +143,47 @@ static void usage(u8* argv0) {
"file\n"
" -C - crash exploration mode (the peruvian rabbit thing)\n"
" -e ext - File extension for the temporarily generated test "
"case\n\n",
"case\n\n"
argv0, EXEC_TIMEOUT, MEM_LIMIT);
"Environment variables used:\n"
"AFL_PATH: path to AFL support binaries\n"
"AFL_QUIET: suppress forkserver status messages\n"
"AFL_DEBUG_CHILD_OUTPUT: do not suppress stdout/stderr from target\n"
"LD_BIND_LAZY: do not set LD_BIND_NOW env var for target\n"
"AFL_BENCH_JUST_ONE: run the target just once\n"
"AFL_DUMB_FORKSRV: use fork server without feedback from target\n"
"AFL_CUSTOM_MUTATOR_LIBRARY: lib with afl_custom_mutator() to mutate inputs\n"
"AFL_CUSTOM_MUTATOR_ONLY: avoid AFL++'s internal mutators\n"
"AFL_PYTHON_MODULE: mutate and trim inputs with the specified Python module\n"
"AFL_PYTHON_ONLY: skip AFL++'s own mutators\n"
"AFL_DEBUG: extra debugging output for Python mode trimming\n"
"AFL_DISABLE_TRIM: disable the trimming of test cases\n"
"AFL_NO_UI: switch status screen off\n"
"AFL_FORCE_UI: force showing the status screen (for virtual consoles)\n"
"AFL_NO_CPU_RED: avoid red color for showing very high cpu usage\n"
"AFL_SKIP_CPUFREQ: do not warn about variable cpu clocking\n"
"AFL_NO_FORKSRV: run target via execve instead of using the forkserver\n"
"AFL_NO_ARITH: skip arithmetic mutations in deterministic stage\n"
"AFL_SHUFFLE_QUEUE: reorder the input queue randomly on startup\n"
"AFL_FAST_CAL: limit the calibration stage to three cycles for speedup\n"
"AFL_HANG_TMOUT: override timeout value (in milliseconds)\n"
"AFL_PRELOAD: LD_PRELOAD / DYLD_INSERT_LIBRARIES settings for target\n"
"AFL_TMPDIR: directory to use for input file generation (ramdisk recommended)\n"
"AFL_IMPORT_FIRST: sync and import test cases from other fuzzer instances first\n"
"AFL_NO_AFFINITY: do not check for an unused cpu core to use for fuzzing\n"
"AFL_POST_LIBRARY: postprocess generated test cases before use as target input\n"
"AFL_SKIP_CRASHES: during initial dry run do not terminate for crashing inputs\n"
"AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES: don't warn about core dump handlers\n"
"ASAN_OPTIONS: custom settings for ASAN\n"
" (must contain abort_on_error=1 and symbolize=0)\n"
"MSAN_OPTIONS: custom settings for MSAN\n"
" (must contain exitcode="STRINGIFY(MSAN_ERROR)" and symbolize=0)\n"
"AFL_SKIP_BIN_CHECK: skip the check, if the target is an excutable\n"
"AFL_PERSISTENT: not supported anymore -> no effect, just a warning\n"
"AFL_DEFER_FORKSRV: not supported anymore -> no effect, just a warning\n"
"AFL_EXIT_WHEN_DONE: exit when all inputs are run and no new finds are found\n"
"AFL_BENCH_UNTIL_CRASH: exit soon when the first crashing input has been found\n"
, argv0, EXEC_TIMEOUT, MEM_LIMIT);
#ifdef USE_PYTHON
SAYF("Compiled with %s module support, see docs/python_mutators.md\n",