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Merge pull request #2033 from gnbon/stable

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Add -l option for adjustable block deletion performance in tmin
This commit is contained in:
van Hauser
2024-03-15 08:39:39 +07:00
committed by GitHub
parent 93c7a42453 1860f6e594
commit a96bda82f9
1 changed files with 28 additions and 6 deletions
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34
src/afl-tmin.c
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@ -82,6 +82,8 @@ static u8 crash_mode, /* Crash-centric mode? */
remove_shm = 1, /* remove shmem on exit? */
debug; /* debug mode */
static u32 del_len_limit = 1; /* Minimum block deletion length */
static volatile u8 stop_soon; /* Ctrl-C pressed? */
static afl_forkserver_t *fsrv;
@ -480,7 +482,7 @@ next_del_blksize:
}
if (del_len > 1 && in_len >= 1) {
if (del_len > del_len_limit && in_len >= 1) {
del_len /= 2;
goto next_del_blksize;
@ -796,8 +798,9 @@ static void usage(u8 *argv0) {
"Minimization settings:\n"
" -e - solve for edge coverage only, ignore hit counts\n"
" -x - treat non-zero exit codes as crashes\n\n"
" -H - minimize a hang (hang mode)\n"
" -l bytes - set minimum block deletion length to speed up minimization\n"
" -x - treat non-zero exit codes as crashes\n"
" -H - minimize a hang (hang mode)\n\n"
"For additional tips, please consult %s/README.md.\n\n"
@ -829,8 +832,9 @@ static void usage(u8 *argv0) {
int main(int argc, char **argv_orig, char **envp) {
s32 opt;
u8 mem_limit_given = 0, timeout_given = 0, unicorn_mode = 0, use_wine = 0;
s32 opt;
u8 mem_limit_given = 0, timeout_given = 0, unicorn_mode = 0, use_wine = 0,
del_limit_given = 0;
char **use_argv;
char **argv = argv_cpy_dup(argc, argv_orig);
@ -846,7 +850,7 @@ int main(int argc, char **argv_orig, char **envp) {
SAYF(cCYA "afl-tmin" VERSION cRST " by Michal Zalewski\n");
while ((opt = getopt(argc, argv, "+i:o:f:m:t:B:xeAOQUWXYHh")) > 0) {
while ((opt = getopt(argc, argv, "+i:o:f:m:t:l:B:xeAOQUWXYHh")) > 0) {
switch (opt) {
@ -1055,6 +1059,24 @@ int main(int argc, char **argv_orig, char **envp) {
read_bitmap(optarg, mask_bitmap, map_size);
break;
case 'l':
if (del_limit_given) { FATAL("Multiple -l options not supported"); }
del_limit_given = 1;
if (!optarg) { FATAL("Wrong usage of -l"); }
if (optarg[0] == '-') { FATAL("Dangerously low value of -l"); }
del_len_limit = atoi(optarg);
if (del_len_limit < 1 || del_len_limit > TMIN_MAX_FILE) {
FATAL("Value of -l out of range between 1 and TMIN_MAX_FILE");
}
break;
case 'h':
usage(argv[0]);
return -1;