server.assert_file = file;
server.assert_line = line;
redisLog(REDIS_WARNING,"(forcing SIGSEGV to print the bug report.)");
- *((char*)-1) = 'x';
#endif
+ *((char*)-1) = 'x';
}
void _redisAssertPrintClientInfo(redisClient *c) {
redisLog(REDIS_WARNING,"Guru Meditation: %s #%s:%d",msg,file,line);
#ifdef HAVE_BACKTRACE
redisLog(REDIS_WARNING,"(forcing SIGSEGV in order to print the stack trace)");
+#endif
redisLog(REDIS_WARNING,"------------------------------------------------");
*((char*)-1) = 'x';
-#endif
+}
+
+void bugReportStart(void) {
+ if (server.bug_report_start == 0) {
+ redisLog(REDIS_WARNING,
+ "\n\n=== REDIS BUG REPORT START: Cut & paste starting from here ===");
+ server.bug_report_start = 1;
+ }
}
#ifdef HAVE_BACKTRACE
#endif
}
-void bugReportStart(void) {
- if (server.bug_report_start == 0) {
- redisLog(REDIS_WARNING,
- "\n\n=== REDIS BUG REPORT START: Cut & paste starting from here ===");
- server.bug_report_start = 1;
- }
-}
-
void logStackContent(void **sp) {
int i;
for (i = 15; i >= 0; i--) {
- redisLog(REDIS_WARNING, "(%p) -> %p", sp+i, sp[i]);
+ if (sizeof(long) == 4)
+ redisLog(REDIS_WARNING, "(%08lx) -> %08lx", sp+i, sp[i]);
+ else
+ redisLog(REDIS_WARNING, "(%016lx) -> %016lx", sp+i, sp[i]);
}
}
#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
redisLog(REDIS_WARNING,
"\n"
- "RAX:%p RBX:%p RCX:%p RDX:%p\n"
- "RDI:%p RSI:%p RBP:%p RSP:%p\n"
- "R8:%p R9:%p R10:%p R11:%p\n"
- "R12:%p R13:%p R14:%p R15:%p\n"
- "RIP:%p EFL:%p CS:%p FS:%p GS:%p",
+ "RAX:%016lx RBX:%016lx\nRCX:%016lx RDX:%016lx\n"
+ "RDI:%016lx RSI:%016lx\nRBP:%016lx RSP:%016lx\n"
+ "R8 :%016lx R9 :%016lx\nR10:%016lx R11:%016lx\n"
+ "R12:%016lx R13:%016lx\nR14:%016lx R15:%016lx\n"
+ "RIP:%016lx EFL:%016lx\nCS :%016lx FS:%016lx GS:%016lx",
uc->uc_mcontext->__ss.__rax,
uc->uc_mcontext->__ss.__rbx,
uc->uc_mcontext->__ss.__rcx,
#else
redisLog(REDIS_WARNING,
"\n"
- "EAX:%p EBX:%p ECX:%p EDX:%p\n"
- "EDI:%p ESI:%p EBP:%p ESP:%p\n"
- "SS:%p EFL:%p EIP:%p CS:%p\n"
- "DS:%p ES:%p FS:%p GS:%p",
+ "EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n"
+ "EDI:%08lx ESI:%08lx EBP:%08lx ESP:%08lx\n"
+ "SS:%08lx EFL:%08lx EIP:%08lx CS :%08lx\n"
+ "DS:%08lx ES:%08lx FS :%08lx GS :%08lx",
uc->uc_mcontext->__ss.__eax,
uc->uc_mcontext->__ss.__ebx,
uc->uc_mcontext->__ss.__ecx,
logStackContent((void**)uc->uc_mcontext->__ss.__esp);
#endif
#elif defined(__i386__)
- return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */
+ redisLog(REDIS_WARNING,
+ "\n"
+ "EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n"
+ "EDI:%08lx ESI:%08lx EBP:%08lx ESP:%08lx\n"
+ "SS :%08lx EFL:%08lx EIP:%08lx CS:%08lx\n"
+ "DS :%08lx ES :%08lx FS :%08lx GS:%08lx",
+ uc->uc_mcontext.gregs[11],
+ uc->uc_mcontext.gregs[8],
+ uc->uc_mcontext.gregs[10],
+ uc->uc_mcontext.gregs[9],
+ uc->uc_mcontext.gregs[4],
+ uc->uc_mcontext.gregs[5],
+ uc->uc_mcontext.gregs[6],
+ uc->uc_mcontext.gregs[7],
+ uc->uc_mcontext.gregs[18],
+ uc->uc_mcontext.gregs[17],
+ uc->uc_mcontext.gregs[14],
+ uc->uc_mcontext.gregs[15],
+ uc->uc_mcontext.gregs[3],
+ uc->uc_mcontext.gregs[2],
+ uc->uc_mcontext.gregs[1],
+ uc->uc_mcontext.gregs[0]
+ );
+ logStackContent((void**)uc->uc_mcontext.gregs[7]);
#elif defined(__X86_64__) || defined(__x86_64__)
- return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */
+ redisLog(REDIS_WARNING,
+ "\n"
+ "RAX:%016lx RBX:%016lx\nRCX:%016lx RDX:%016lx\n"
+ "RDI:%016lx RSI:%016lx\nRBP:%016lx RSP:%016lx\n"
+ "R8 :%016lx R9 :%016lx\nR10:%016lx R11:%016lx\n"
+ "R12:%016lx R13:%016lx\nR14:%016lx R15:%016lx\n"
+ "RIP:%016lx EFL:%016lx\nCSGSFS:%016lx",
+ uc->uc_mcontext.gregs[13],
+ uc->uc_mcontext.gregs[11],
+ uc->uc_mcontext.gregs[14],
+ uc->uc_mcontext.gregs[12],
+ uc->uc_mcontext.gregs[8],
+ uc->uc_mcontext.gregs[9],
+ uc->uc_mcontext.gregs[10],
+ uc->uc_mcontext.gregs[15],
+ uc->uc_mcontext.gregs[0],
+ uc->uc_mcontext.gregs[1],
+ uc->uc_mcontext.gregs[2],
+ uc->uc_mcontext.gregs[3],
+ uc->uc_mcontext.gregs[4],
+ uc->uc_mcontext.gregs[5],
+ uc->uc_mcontext.gregs[6],
+ uc->uc_mcontext.gregs[7],
+ uc->uc_mcontext.gregs[16],
+ uc->uc_mcontext.gregs[17],
+ uc->uc_mcontext.gregs[18]
+ );
+ logStackContent((void**)uc->uc_mcontext.gregs[15]);
#else
redisLog(REDIS_WARNING,
" Dumping of registers not supported for this OS/arch");
#endif
}
-void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
+/* Logs the stack trace using the backtrace() call. */
+sds getStackTrace(ucontext_t *uc) {
void *trace[100];
- char **messages = NULL;
int i, trace_size = 0;
+ char **messages = NULL;
+ sds st = sdsempty();
+
+ /* 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);
+ for (i=1; i<trace_size; ++i) {
+ st = sdscat(st,messages[i]);
+ st = sdscatlen(st,"\n",1);
+ }
+ zlibc_free(messages);
+ return st;
+}
+
+/* Log information about the "current" client, that is, the client that is
+ * currently being served by Redis. May be NULL if Redis is not serving a
+ * client right now. */
+void logCurrentClient(void) {
+ if (server.current_client == NULL) return;
+
+ redisClient *cc = server.current_client;
+ sds client;
+ int j;
+
+ redisLog(REDIS_WARNING, "--- CURRENT CLIENT INFO");
+ client = getClientInfoString(cc);
+ redisLog(REDIS_WARNING,"client: %s", client);
+ sdsfree(client);
+ 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);
+ }
+}
+
+void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
ucontext_t *uc = (ucontext_t*) secret;
- sds infostring, clients;
+ sds infostring, clients, st;
struct sigaction act;
REDIS_NOTUSED(info);
" 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 the stack trace */
+ st = getStackTrace(uc);
+ redisLog(REDIS_WARNING, "--- STACK TRACE\n%s", st);
+ sdsfree(st);
/* Log INFO and CLIENT LIST */
redisLog(REDIS_WARNING, "--- INFO OUTPUT");
infostring = genRedisInfoString("all");
+ infostring = sdscatprintf(infostring, "hash_init_value: %u\n",
+ dictGetHashFunctionSeed());
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;
+ sdsfree(infostring);
+ sdsfree(clients);
- 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);
- }
- }
+ /* Log the current client */
+ logCurrentClient();
/* Log dump of processor registers */
logRegisters(uc);
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"
-" http://github.com/antirez/redis/issues\n\n"
+" Please report the crash opening an issue on github:\n\n"
+" http://github.com/antirez/redis/issues\n\n"
+" Suspect RAM error? Use redis-server --test-memory to veryfy it.\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 */
+
+/* =========================== Software Watchdog ============================ */
+#include <sys/time.h>
+
+void watchdogSignalHandler(int sig, siginfo_t *info, void *secret) {
+ ucontext_t *uc = (ucontext_t*) secret;
+ REDIS_NOTUSED(info);
+ REDIS_NOTUSED(sig);
+ sds st, log;
+
+ log = sdsnew("\n--- WATCHDOG TIMER EXPIRED ---\n");
+#ifdef HAVE_BACKTRACE
+ st = getStackTrace(uc);
+#else
+ st = sdsnew("Sorry: no support for backtrace().\n");
+#endif
+ log = sdscatsds(log,st);
+ log = sdscat(log,"------\n");
+ redisLogFromHandler(REDIS_WARNING,log);
+ sdsfree(st);
+ sdsfree(log);
+}
+
+/* Schedule a SIGALRM delivery after the specified period in milliseconds.
+ * If a timer is already scheduled, this function will re-schedule it to the
+ * specified time. If period is 0 the current timer is disabled. */
+void watchdogScheduleSignal(int period) {
+ struct itimerval it;
+
+ /* Will stop the timer if period is 0. */
+ it.it_value.tv_sec = period/1000;
+ it.it_value.tv_usec = (period%1000)*1000;
+ /* Don't automatically restart. */
+ it.it_interval.tv_sec = 0;
+ it.it_interval.tv_usec = 0;
+ setitimer(ITIMER_REAL, &it, NULL);
+}
+
+/* Enable the software watchdong with the specified period in milliseconds. */
+void enableWatchdog(int period) {
+ if (server.watchdog_period == 0) {
+ struct sigaction act;
+
+ /* Watchdog was actually disabled, so we have to setup the signal
+ * handler. */
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_SIGINFO;
+ act.sa_sigaction = watchdogSignalHandler;
+ sigaction(SIGALRM, &act, NULL);
+ }
+ if (period < 200) period = 200; /* We don't accept periods < 200 ms. */
+ watchdogScheduleSignal(period); /* Adjust the current timer. */
+ server.watchdog_period = period;
+}
+
+/* Disable the software watchdog. */
+void disableWatchdog(void) {
+ struct sigaction act;
+ if (server.watchdog_period == 0) return; /* Already disabled. */
+ watchdogScheduleSignal(0); /* Stop the current timer. */
+
+ /* Set the signal handler to SIG_IGN, this will also remove pending
+ * signals from the queue. */
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = 0;
+ act.sa_handler = SIG_IGN;
+ sigaction(SIGALRM, &act, NULL);
+ server.watchdog_period = 0;
+}
projects / redis.git / blobdiff