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added test and debug

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This commit is contained in:
van Hauser
2019-07-20 13:12:19 +02:00
parent 5ac5d91c6b
commit c7887abb64
3 changed files with 79 additions and 2 deletions
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11
qemu_mode/libcompcov/libcompcov.so.c
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@ -45,6 +45,8 @@ static void *__compcov_code_start,
static u8 *__compcov_afl_map;
static int debug_fd = -1;
static size_t __strlen2(const char *s1, const char *s2, size_t max_length) {
// from https://github.com/googleprojectzero/CompareCoverage
@ -108,6 +110,12 @@ static void __compcov_trace(u64 cur_loc, const u8* v0, const u8* v1, size_t n) {
size_t i;
if (debug_fd != 1) {
char debugbuf[4096];
snprintf(debugbuf, sizeof(debugbuf), "0x%llx %s %s %lu\n", cur_loc, v0 == NULL ? "(null)" : (char*)v0, v1 == NULL ? "(null)" : (char*)v1, n);
write(debug_fd, debugbuf, strlen(debugbuf));
}
for (i = 0; i < n && v0[i] == v1[i]; ++i) {
__compcov_afl_map[cur_loc +i]++;
@ -301,6 +309,9 @@ int memcmp(const void* mem1, const void* mem2, size_t len) {
__attribute__((constructor)) void __compcov_init(void) {
if (getenv("AFL_QEMU_COMPCOV_DEBUG") != NULL)
debug_fd = open("compcov.debug", O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, 0644);
__compcov_load();
}