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cleaned up AFL_KILL_SIGNAL

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Dominik Maier
2021-01-07 23:21:10 +01:00
parent 9cdf5c4150
commit a06b25538f
7 changed files with 104 additions and 44 deletions
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30
src/afl-fuzz.c
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@ -194,10 +194,11 @@ static void usage(u8 *argv0, int more_help) {
"AFL_EXPAND_HAVOC_NOW: immediately enable expand havoc mode (default: after 60 minutes and a cycle without finds)\n"
"AFL_FAST_CAL: limit the calibration stage to three cycles for speedup\n"
"AFL_FORCE_UI: force showing the status screen (for virtual consoles)\n"
"AFL_HANG_TMOUT: override timeout value (in milliseconds)\n"
"AFL_FORKSRV_INIT_TMOUT: time spent waiting for forkserver during startup (in milliseconds)\n"
"AFL_HANG_TMOUT: override timeout value (in milliseconds)\n"
"AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES: don't warn about core dump handlers\n"
"AFL_IMPORT_FIRST: sync and import test cases from other fuzzer instances first\n"
"AFL_KILL_SIGNAL: Signal ID delivered to child processes on timeout, etc. (default: SIGKILL)\n"
"AFL_MAP_SIZE: the shared memory size for that target. must be >= the size\n"
" the target was compiled for\n"
"AFL_MAX_DET_EXTRAS: if more entries are in the dictionary list than this value\n"
@ -986,6 +987,33 @@ int main(int argc, char **argv_orig, char **envp) {
#endif
afl->fsrv.kill_signal = SIGKILL;
if (afl->afl_env.afl_kill_signal) {
char *endptr;
u8 signal_code;
signal_code = (u8)strtoul(afl->afl_env.afl_kill_signal, &endptr, 10);
/* Did we manage to parse the full string? */
if (*endptr != '\0' || endptr == (char *)afl->afl_env.afl_kill_signal) {
FATAL("Invalid AFL_KILL_SIGNAL: %s (expected unsigned int)",
afl->afl_env.afl_kill_signal);
}
afl->fsrv.kill_signal = signal_code;
} else {
char *sigstr = alloc_printf("%d", (int)SIGKILL);
if (!sigstr) { FATAL("Failed to alloc mem for signal buf"); }
/* Set the env for signal handler */
setenv("AFL_KILL_SIGNAL", sigstr, 1);
free(sigstr);
}
setup_signal_handlers();
check_asan_opts(afl);