X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/a7d12cbaf1425bf86f18b7dfac99f7b1ee1500e2..a5f8341245aeebd22a2474e92c4ed497eae01545:/src/redis.c diff --git a/src/redis.c b/src/redis.c index 5af2b1df..2b1007b5 100644 --- a/src/redis.c +++ b/src/redis.c @@ -48,6 +48,7 @@ #include #include #include +#include /* Our shared "common" objects */ @@ -61,6 +62,9 @@ double R_Zero, R_PosInf, R_NegInf, R_Nan; /*================================= Globals ================================= */ +/* Alternate stack for SIGSEGV/etc handlers */ +char altstack[SIGSTKSZ]; + /* Global vars */ struct redisServer server; /* server global state */ struct redisCommand *commandTable; @@ -222,7 +226,7 @@ struct redisCommand redisCommandTable[] = { {"ttl",ttlCommand,2,"r",0,NULL,1,1,1,0,0}, {"pttl",pttlCommand,2,"r",0,NULL,1,1,1,0,0}, {"persist",persistCommand,2,"w",0,NULL,1,1,1,0,0}, - {"slaveof",slaveofCommand,3,"aws",0,NULL,0,0,0,0,0}, + {"slaveof",slaveofCommand,3,"as",0,NULL,0,0,0,0,0}, {"debug",debugCommand,-2,"as",0,NULL,0,0,0,0,0}, {"config",configCommand,-2,"ar",0,NULL,0,0,0,0,0}, {"subscribe",subscribeCommand,-2,"rps",0,NULL,0,0,0,0,0}, @@ -253,7 +257,6 @@ struct redisCommand redisCommandTable[] = { void redisLogRaw(int level, const char *msg) { const int syslogLevelMap[] = { LOG_DEBUG, LOG_INFO, LOG_NOTICE, LOG_WARNING }; const char *c = ".-*#"; - time_t now = time(NULL); FILE *fp; char buf[64]; int rawmode = (level & REDIS_LOG_RAW); @@ -267,7 +270,12 @@ void redisLogRaw(int level, const char *msg) { if (rawmode) { fprintf(fp,"%s",msg); } else { - strftime(buf,sizeof(buf),"%d %b %H:%M:%S",localtime(&now)); + int off; + struct timeval tv; + + gettimeofday(&tv,NULL); + off = strftime(buf,sizeof(buf),"%d %b %H:%M:%S.",localtime(&tv.tv_sec)); + snprintf(buf+off,sizeof(buf)-off,"%03d",(int)tv.tv_usec/1000); fprintf(fp,"[%d] %s %c %s\n",(int)getpid(),buf,c[level],msg); } fflush(fp); @@ -307,18 +315,19 @@ void redisLogFromHandler(int level, const char *msg) { (server.logfile == NULL && server.daemonize)) return; fd = server.logfile ? open(server.logfile, O_APPEND|O_CREAT|O_WRONLY, 0644) : - STDIN_FILENO; + STDOUT_FILENO; if (fd == -1) return; ll2string(buf,sizeof(buf),getpid()); - write(fd,"[",1); - write(fd,buf,strlen(buf)); - write(fd," | signal handler] (",20); + if (write(fd,"[",1) == -1) goto err; + if (write(fd,buf,strlen(buf)) == -1) goto err; + if (write(fd," | signal handler] (",20) == -1) goto err; ll2string(buf,sizeof(buf),time(NULL)); - write(fd,buf,strlen(buf)); - write(fd,") ",2); - write(fd,msg,strlen(msg)); - write(fd,"\n",1); - close(fd); + if (write(fd,buf,strlen(buf)) == -1) goto err; + if (write(fd,") ",2) == -1) goto err; + if (write(fd,msg,strlen(msg)) == -1) goto err; + if (write(fd,"\n",1) == -1) goto err; +err: + if (server.logfile) close(fd); } /* Redis generally does not try to recover from out of memory conditions @@ -348,6 +357,18 @@ long long mstime(void) { return ustime()/1000; } +/* After an RDB dump or AOF rewrite we exit from children using _exit() instead of + * exit(), because the latter may interact with the same file objects used by + * the parent process. However if we are testing the coverage normal exit() is + * used in order to obtain the right coverage information. */ +void exitFromChild(int retcode) { +#ifdef COVERAGE_TEST + exit(retcode); +#else + _exit(retcode); +#endif +} + /*====================== Hash table type implementation ==================== */ /* This is an hash table type that uses the SDS dynamic strings libary as @@ -977,16 +998,11 @@ void createSharedObjects(void) { shared.space = createObject(REDIS_STRING,sdsnew(" ")); shared.colon = createObject(REDIS_STRING,sdsnew(":")); shared.plus = createObject(REDIS_STRING,sdsnew("+")); - shared.select0 = createStringObject("select 0\r\n",10); - shared.select1 = createStringObject("select 1\r\n",10); - shared.select2 = createStringObject("select 2\r\n",10); - shared.select3 = createStringObject("select 3\r\n",10); - shared.select4 = createStringObject("select 4\r\n",10); - shared.select5 = createStringObject("select 5\r\n",10); - shared.select6 = createStringObject("select 6\r\n",10); - shared.select7 = createStringObject("select 7\r\n",10); - shared.select8 = createStringObject("select 8\r\n",10); - shared.select9 = createStringObject("select 9\r\n",10); + + for (j = 0; j < REDIS_SHARED_SELECT_CMDS; j++) { + shared.select[j] = createObject(REDIS_STRING, + sdscatprintf(sdsempty(),"select %d\r\n", j)); + } shared.messagebulk = createStringObject("$7\r\nmessage\r\n",13); shared.pmessagebulk = createStringObject("$8\r\npmessage\r\n",14); shared.subscribebulk = createStringObject("$9\r\nsubscribe\r\n",15); @@ -1046,6 +1062,7 @@ void initServerConfig() { server.aof_filename = zstrdup("appendonly.aof"); server.requirepass = NULL; server.rdb_compression = 1; + server.rdb_checksum = 1; server.activerehashing = 1; server.maxclients = REDIS_MAX_CLIENTS; server.bpop_blocked_clients = 0; @@ -1084,7 +1101,7 @@ void initServerConfig() { server.repl_syncio_timeout = REDIS_REPL_SYNCIO_TIMEOUT; server.repl_serve_stale_data = 1; server.repl_slave_ro = 1; - server.repl_down_since = -1; + server.repl_down_since = time(NULL); /* Client output buffer limits */ server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].hard_limit_bytes = 0; @@ -1136,7 +1153,6 @@ void adjustOpenFilesLimit(void) { rlim_t maxfiles = server.maxclients+32; struct rlimit limit; - if (maxfiles < 1024) maxfiles = 1024; if (getrlimit(RLIMIT_NOFILE,&limit) == -1) { redisLog(REDIS_WARNING,"Unable to obtain the current NOFILE limit (%s), assuming 1024 and setting the max clients configuration accordingly.", strerror(errno)); @@ -1147,10 +1163,18 @@ void adjustOpenFilesLimit(void) { /* Set the max number of files if the current limit is not enough * for our needs. */ if (oldlimit < maxfiles) { - limit.rlim_cur = maxfiles; - limit.rlim_max = maxfiles; - if (setrlimit(RLIMIT_NOFILE,&limit) == -1) { - server.maxclients = oldlimit-32; + rlim_t f; + + f = maxfiles; + while(f > oldlimit) { + limit.rlim_cur = f; + limit.rlim_max = f; + if (setrlimit(RLIMIT_NOFILE,&limit) != -1) break; + f -= 128; + } + if (f < oldlimit) f = oldlimit; + if (f != maxfiles) { + server.maxclients = f-32; redisLog(REDIS_WARNING,"Unable to set the max number of files limit to %d (%s), setting the max clients configuration to %d.", (int) maxfiles, strerror(errno), (int) server.maxclients); } else { @@ -1732,12 +1756,16 @@ sds genRedisInfoString(char *section) { /* Server */ if (allsections || defsections || !strcasecmp(section,"server")) { + struct utsname name; + if (sections++) info = sdscat(info,"\r\n"); + uname(&name); info = sdscatprintf(info, "# Server\r\n" "redis_version:%s\r\n" "redis_git_sha1:%s\r\n" "redis_git_dirty:%d\r\n" + "os:%s %s %s\r\n" "arch_bits:%d\r\n" "multiplexing_api:%s\r\n" "gcc_version:%d.%d.%d\r\n" @@ -1750,6 +1778,7 @@ sds genRedisInfoString(char *section) { REDIS_VERSION, redisGitSHA1(), strtol(redisGitDirty(),NULL,10) > 0, + name.sysname, name.release, name.machine, server.arch_bits, aeGetApiName(), #ifdef __GNUC__ @@ -1819,14 +1848,16 @@ sds genRedisInfoString(char *section) { "bgsave_in_progress:%d\r\n" "last_save_time:%ld\r\n" "last_bgsave_status:%s\r\n" - "bgrewriteaof_in_progress:%d\r\n", + "bgrewriteaof_in_progress:%d\r\n" + "bgrewriteaof_scheduled:%d\r\n", server.loading, server.aof_state != REDIS_AOF_OFF, server.dirty, server.rdb_child_pid != -1, server.lastsave, server.lastbgsave_status == REDIS_OK ? "ok" : "err", - server.aof_child_pid != -1); + server.aof_child_pid != -1, + server.aof_rewrite_scheduled); if (server.aof_state != REDIS_AOF_OFF) { info = sdscatprintf(info, @@ -2010,7 +2041,7 @@ sds genRedisInfoString(char *section) { } } - /* Clusetr */ + /* Cluster */ if (allsections || defsections || !strcasecmp(section,"cluster")) { if (sections++) info = sdscat(info,"\r\n"); info = sdscatprintf(info, @@ -2270,8 +2301,12 @@ void daemonize(void) { } void version() { - printf("Redis server v=%s sha=%s:%d malloc=%s\n", REDIS_VERSION, - redisGitSHA1(), atoi(redisGitDirty()) > 0, ZMALLOC_LIB); + printf("Redis server v=%s sha=%s:%d malloc=%s bits=%d\n", + REDIS_VERSION, + redisGitSHA1(), + atoi(redisGitDirty()) > 0, + ZMALLOC_LIB, + sizeof(long) == 4 ? 32 : 64); exit(0); } @@ -2316,15 +2351,24 @@ static void sigtermHandler(int sig) { void setupSignalHandlers(void) { struct sigaction act; + stack_t stack; + + stack.ss_sp = altstack; + stack.ss_flags = 0; + stack.ss_size = SIGSTKSZ; + + sigaltstack(&stack, NULL); /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction is used. * Otherwise, sa_handler is used. */ sigemptyset(&act.sa_mask); - act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND; + act.sa_flags = 0; act.sa_handler = sigtermHandler; sigaction(SIGTERM, &act, NULL); #ifdef HAVE_BACKTRACE + /* Use alternate stack so we don't clobber stack in case of segv, or when we run out of stack .. + * also resethand & nodefer so we can get interrupted (and killed) if we cause SEGV during SEGV handler */ sigemptyset(&act.sa_mask); act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO; act.sa_sigaction = sigsegvHandler;