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- put some order in code

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- better output
This commit is contained in:
hrothgar 2009-06-05 10:10:44 +00:00
parent 8a355d697a
commit fe3bbfbe16
1 changed files with 36 additions and 39 deletions
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73
redis.c
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@ -378,7 +378,7 @@ static void getSetCommand(redisClient *c);
static void ttlCommand(redisClient *c); static void ttlCommand(redisClient *c);
static void slaveofCommand(redisClient *c); static void slaveofCommand(redisClient *c);
static void debugCommand(redisClient *c); static void debugCommand(redisClient *c);
static void setupSigSegvAction();
/*================================= Globals ================================= */ /*================================= Globals ================================= */
/* Global vars */ /* Global vars */
@ -898,6 +898,7 @@ static void initServer() {
signal(SIGHUP, SIG_IGN); signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN); signal(SIGPIPE, SIG_IGN);
setupSigSegvAction();
server.clients = listCreate(); server.clients = listCreate();
server.slaves = listCreate(); server.slaves = listCreate();
@ -4080,6 +4081,39 @@ static void debugCommand(redisClient *c) {
} }
} }
static void segvHandler (int sig, siginfo_t *info, void *secret) {
void *trace[100];
char **messages = (char **)NULL;
int i, trace_size = 0;
ucontext_t *uc = (ucontext_t *)secret;
redisLog(REDIS_DEBUG, "Segmentation fault -%d- Redis %s", sig, REDIS_VERSION );
redisLog(REDIS_DEBUG,"EIP %p", (void *)uc->uc_mcontext.gregs[REG_EIP]);
redisLog(REDIS_DEBUG,"EAX %p, EBX %p, ECX %p, EDX %p", (void *)uc->uc_mcontext.gregs[REG_EAX], (void *)uc->uc_mcontext.gregs[REG_EBX], (void *)uc->uc_mcontext.gregs[REG_ECX], (void *)uc->uc_mcontext.gregs[REG_EDX]);
trace_size = backtrace(trace, 100);
/* overwrite sigaction with caller's address */
trace[1] = (void *) uc->uc_mcontext.gregs[REG_EIP];
messages = backtrace_symbols(trace, trace_size);
for (i=1; i<trace_size; ++i)
redisLog(REDIS_DEBUG,"[bt] %s", messages[i]);
free(messages);
exit(0);
}
void setupSigSegvAction(){
struct sigaction act;
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 | SA_SIGINFO;
act.sa_sigaction = segvHandler;
sigaction (SIGSEGV, &act, NULL);
}
/* =================================== Main! ================================ */ /* =================================== Main! ================================ */
#ifdef __linux__ #ifdef __linux__
@ -4128,44 +4162,7 @@ static void daemonize(void) {
} }
} }
static void segvHandler (int sig, siginfo_t *info, void *secret) {
void *trace[16];
char **messages = (char **)NULL;
int i, trace_size = 0;
ucontext_t *uc = (ucontext_t *)secret;
/* Do something useful with siginfo_t */
if (sig == SIGSEGV)
printf("Got signal %d, faulty address is %p, from %p\n", sig, info->si_addr,
(void *)uc->uc_mcontext.gregs[REG_EIP]);
else
printf("Got signal %d\n", sig);
trace_size = backtrace(trace, 16);
/* overwrite sigaction with caller's address */
trace[1] = (void *) uc->uc_mcontext.gregs[REG_EIP];
messages = backtrace_symbols(trace, trace_size);
/* skip first stack frame (points here) */
printf("[bt] Execution path:\n");
for (i=1; i<trace_size; ++i)
printf("[bt] %s\n", messages[i]);
exit(0);
}
void setupSigAction(){
struct sigaction act;
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 | SA_SIGINFO;
act.sa_sigaction = segvHandler;
sigaction (SIGSEGV, &act, NULL);
}
int main(int argc, char **argv) { int main(int argc, char **argv) {
setupSigAction();
#ifdef __linux__ #ifdef __linux__
linuxOvercommitMemoryWarning(); linuxOvercommitMemoryWarning();
#endif #endif