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Fast memory test on Redis crash.

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This commit is contained in:
antirez
2012-11-21 13:19:38 +01:00
parent dd905417ec
commit d4b5c4803b
2 changed files with 86 additions and 0 deletions
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55
src/debug.c
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@ -665,6 +665,49 @@ void logCurrentClient(void) {
}
}
#if defined(HAVE_PROC_MAPS)
int memtest_non_destructive(void *addr, size_t size); /* memtest.c */
int memtest_test_linux_anonymous_maps(void) {
FILE *fp = fopen("/proc/self/maps","r");
char line[1024];
size_t start_addr, end_addr, size;
while(fgets(line,sizeof(line),fp) != NULL) {
char *start, *end, *p = line;
int j;
start = p;
p = strchr(p,'-');
if (!p) continue;
*p++ = '\0';
end = p;
p = strchr(p,' ');
if (!p) continue;
*p++ = '\0';
if (strstr(p,"stack") ||
strstr(p,"vdso") ||
strstr(p,"vsyscall")) continue;
if (!strstr(p,"00:00")) continue;
if (!strstr(p,"rw")) continue;
start_addr = strtoul(start,NULL,16);
end_addr = strtoul(end,NULL,16);
size = end_addr-start_addr;
redisLog(REDIS_WARNING,
"Testing memory at %lx (%lu bytes)", start_addr, size);
for (j = 0; j < 3; j++) {
if (memtest_non_destructive((void*)start_addr,size) != 0) {
fclose(fp);
return 1;
}
}
}
fclose(fp);
return 0;
}
#endif
void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
ucontext_t *uc = (ucontext_t*) secret;
sds infostring, clients;
@ -700,6 +743,18 @@ void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
/* Log dump of processor registers */
logRegisters(uc);
#if defined(HAVE_PROC_MAPS)
/* Test memory */
redisLog(REDIS_WARNING, "--- FAST MEMORY TEST");
if (memtest_test_linux_anonymous_maps()) {
redisLog(REDIS_WARNING,
"!!! MEMORY ERROR DETECTED! Check your memory ASAP !!!");
} else {
redisLog(REDIS_WARNING,
"Fast memory test PASSED, however your memory can still be broken. Please run a memory test for several hours if possible.");
}
#endif
redisLog(REDIS_WARNING,
"\n=== REDIS BUG REPORT END. Make sure to include from START to END. ===\n\n"
" Please report the crash opening an issue on github:\n\n"