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Log from signal handlers is now safer.

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This commit is contained in:
antirez
2012-03-28 13:45:39 +02:00
parent 1043c8064b
commit a7d12cbaf1
3 changed files with 33 additions and 13 deletions
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15
src/debug.c
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@ -682,25 +682,16 @@ void watchdogSignalHandler(int sig, siginfo_t *info, void *secret) {
REDIS_NOTUSED(info);
REDIS_NOTUSED(sig);
sds st, log;
time_t now = time(NULL);
char date[128];
FILE *fp;
fp = (server.logfile == NULL) ? stdout : fopen(server.logfile,"a");
if (fp == NULL) return;
strftime(date,sizeof(date),"%d %b %H:%M:%S",localtime(&now));
log = sdscatprintf(sdsempty(),
"\n--- WATCHDOG TIMER EXPIRED (%s) ---\n",date);
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\n");
fprintf(fp,"%s",log);
if (server.logfile) fclose(fp);
log = sdscat(log,"------\n");
redisLogFromHandler(REDIS_WARNING,log);
sdsfree(st);
sdsfree(log);
}