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all the stack trace related functions are now in debug.c. Now Redis dumps registers and stack content on crash. Currently osx supported, adding Linux right now.

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antirez
2012-01-20 12:20:45 +01:00
parent f7ccc4830b
commit d4d208595c
3 changed files with 220 additions and 136 deletions
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135
src/redis.c
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@ -31,11 +31,6 @@
#include "slowlog.h"
#include "bio.h"
#ifdef HAVE_BACKTRACE
#include <execinfo.h>
#include <ucontext.h>
#endif /* HAVE_BACKTRACE */
#include <time.h>
#include <signal.h>
#include <sys/wait.h>
@ -1933,136 +1928,6 @@ void redisAsciiArt(void) {
zfree(buf);
}
#ifdef HAVE_BACKTRACE
static void *getMcontextEip(ucontext_t *uc) {
#if defined(__FreeBSD__)
return (void*) uc->uc_mcontext.mc_eip;
#elif defined(__dietlibc__)
return (void*) uc->uc_mcontext.eip;
#elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
#if __x86_64__
return (void*) uc->uc_mcontext->__ss.__rip;
#elif __i386__
return (void*) uc->uc_mcontext->__ss.__eip;
#else
return (void*) uc->uc_mcontext->__ss.__srr0;
#endif
#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)
#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
return (void*) uc->uc_mcontext->__ss.__rip;
#else
return (void*) uc->uc_mcontext->__ss.__eip;
#endif
#elif defined(__i386__)
return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */
#elif defined(__X86_64__) || defined(__x86_64__)
return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */
#elif defined(__ia64__) /* Linux IA64 */
return (void*) uc->uc_mcontext.sc_ip;
#else
return NULL;
#endif
}
void bugReportStart(void) {
if (server.bug_report_start == 0) {
redisLog(REDIS_WARNING,
"=== REDIS BUG REPORT START: Cut & paste starting from here ===");
server.bug_report_start = 1;
}
}
static void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
void *trace[100];
char **messages = NULL;
int i, trace_size = 0;
ucontext_t *uc = (ucontext_t*) secret;
sds infostring, clients;
struct sigaction act;
REDIS_NOTUSED(info);
bugReportStart();
redisLog(REDIS_WARNING,
" Redis %s crashed by signal: %d", REDIS_VERSION, sig);
redisLog(REDIS_WARNING,
" Failed assertion: %s (%s:%d)", server.assert_failed,
server.assert_file, server.assert_line);
/* Generate the stack trace */
trace_size = backtrace(trace, 100);
/* overwrite sigaction with caller's address */
if (getMcontextEip(uc) != NULL) {
trace[1] = getMcontextEip(uc);
}
messages = backtrace_symbols(trace, trace_size);
redisLog(REDIS_WARNING, "--- STACK TRACE");
for (i=1; i<trace_size; ++i)
redisLog(REDIS_WARNING,"%s", messages[i]);
/* Log INFO and CLIENT LIST */
redisLog(REDIS_WARNING, "--- INFO OUTPUT");
infostring = genRedisInfoString("all");
redisLogRaw(REDIS_WARNING, infostring);
redisLog(REDIS_WARNING, "--- CLIENT LIST OUTPUT");
clients = getAllClientsInfoString();
redisLogRaw(REDIS_WARNING, clients);
/* Don't sdsfree() strings to avoid a crash. Memory may be corrupted. */
/* Log CURRENT CLIENT info */
if (server.current_client) {
redisClient *cc = server.current_client;
sds client;
int j;
redisLog(REDIS_WARNING, "--- CURRENT CLIENT INFO");
client = getClientInfoString(cc);
redisLog(REDIS_WARNING,"client: %s", client);
/* Missing sdsfree(client) to avoid crash if memory is corrupted. */
for (j = 0; j < cc->argc; j++) {
robj *decoded;
decoded = getDecodedObject(cc->argv[j]);
redisLog(REDIS_WARNING,"argv[%d]: '%s'", j, (char*)decoded->ptr);
decrRefCount(decoded);
}
/* Check if the first argument, usually a key, is found inside the
* selected DB, and if so print info about the associated object. */
if (cc->argc >= 1) {
robj *val, *key;
dictEntry *de;
key = getDecodedObject(cc->argv[1]);
de = dictFind(cc->db->dict, key->ptr);
if (de) {
val = dictGetVal(de);
redisLog(REDIS_WARNING,"key '%s' found in DB containing the following object:", key->ptr);
redisLogObjectDebugInfo(val);
}
decrRefCount(key);
}
}
redisLog(REDIS_WARNING,
"=== 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"
" http://github.com/antirez/redis/issues\n\n"
);
/* free(messages); Don't call free() with possibly corrupted memory. */
if (server.daemonize) unlink(server.pidfile);
/* Make sure we exit with the right signal at the end. So for instance
* the core will be dumped if enabled. */
sigemptyset (&act.sa_mask);
/* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction
* is used. Otherwise, sa_handler is used */
act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
act.sa_handler = SIG_DFL;
sigaction (sig, &act, NULL);
kill(getpid(),sig);
}
#endif /* HAVE_BACKTRACE */
static void sigtermHandler(int sig) {
REDIS_NOTUSED(sig);