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reduce overhead

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This commit is contained in:
Kuang-che Wu
2025-05-19 18:50:13 +08:00
parent 7c27fc7cfe
commit c699aa252d
3 changed files with 24 additions and 10 deletions
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4
include/config.h
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@ -339,6 +339,10 @@
#define AVG_SMOOTHING 16 #define AVG_SMOOTHING 16
/* Max length of sync id (the id after -M and -S) */
#define SYNC_ID_MAX_LEN 50
/* Sync interval (every n havoc cycles): */ /* Sync interval (every n havoc cycles): */
#define SYNC_INTERVAL 8 #define SYNC_INTERVAL 8

4
src/afl-fuzz-init.c
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@ -2791,9 +2791,9 @@ void fix_up_sync(afl_state_t *afl) {
} }
if (strlen(afl->sync_id) > 50) { if (strlen(afl->sync_id) > SYNC_ID_MAX_LEN) {
FATAL("sync_id max length is 50 characters"); FATAL("sync_id max length is %d characters", SYNC_ID_MAX_LEN);
} }

26
src/afl-fuzz-run.c
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@ -701,15 +701,25 @@ abort_calibration:
bool is_known_case(afl_state_t *afl, u8 *name, void *mem, u32 len) { bool is_known_case(afl_state_t *afl, u8 *name, void *mem, u32 len) {
int sync_id_pos; static char coming_from_me_str[16 + SYNC_ID_MAX_LEN];
u32 id, src_id; static int coming_from_me_len = 0;
if (sscanf(name, "id:%06u,sync:%n%*[^,],src:%06u", &id, &sync_id_pos, if (!coming_from_me_len) {
&src_id) != 2)
return false;
if (strncmp(name + sync_id_pos, afl->sync_id, strlen(afl->sync_id)) != 0) snprintf(coming_from_me_str, sizeof(coming_from_me_str),
return false; ",sync:%s,src:", afl->sync_id);
if (name[sync_id_pos + strlen(afl->sync_id)] != ',') return false; coming_from_me_len = strlen(coming_from_me_str);
}
// 9 = strlen("id:000000"), 6 = strlen("000000")
if (strlen(name) < 9 + coming_from_me_len + 6) return false;
char *p = name + 9;
while ('0' <= *p && *p <= '9')
p++;
if (strncmp(p, coming_from_me_str, coming_from_me_len) != 0) return false;
int src_id = atoi(p + coming_from_me_len);
if (src_id < 0 || src_id >= afl->queued_items) return false; if (src_id < 0 || src_id >= afl->queued_items) return false;
struct queue_entry *q = afl->queue_buf[src_id]; struct queue_entry *q = afl->queue_buf[src_id];