Merge pull request #449 from ErikDubbelboer/unstable

[redis.git] / src / redis.c

diff --git a/src/redis.c b/src/redis.c
index 07a38b215cb79151e93bb0e58673b9a823e9f26b..f1fda57b5f568d6c96083b08b6182ed463cb21db 100644 (file)
--- a/src/redis.c
+++ b/src/redis.c
@@ -48,6 +48,7 @@
 #include <float.h>
 #include <math.h>
 #include <sys/resource.h>
 #include <float.h>
 #include <math.h>
 #include <sys/resource.h>

+#include <sys/utsname.h>

 
 /* Our shared "common" objects */
 
 
 /* Our shared "common" objects */
 


@@ -61,6 +62,9 @@ double R_Zero, R_PosInf, R_NegInf, R_Nan;
 
 /*================================= Globals ================================= */
 
 
 /*================================= Globals ================================= */
 

+/* Alternate stack for SIGSEGV/etc handlers */
+char altstack[SIGSTKSZ];
+

 /* Global vars */
 struct redisServer server; /* server global state */
 struct redisCommand *commandTable;
 /* Global vars */
 struct redisServer server; /* server global state */
 struct redisCommand *commandTable;


@@ -211,7 +215,7 @@ struct redisCommand redisCommandTable[] = {
     {"lastsave",lastsaveCommand,1,"r",0,NULL,0,0,0,0,0},
     {"type",typeCommand,2,"r",0,NULL,1,1,1,0,0},
     {"multi",multiCommand,1,"rs",0,NULL,0,0,0,0,0},
     {"lastsave",lastsaveCommand,1,"r",0,NULL,0,0,0,0,0},
     {"type",typeCommand,2,"r",0,NULL,1,1,1,0,0},
     {"multi",multiCommand,1,"rs",0,NULL,0,0,0,0,0},

-    {"exec",execCommand,1,"wms",0,NULL,0,0,0,0,0},
+    {"exec",execCommand,1,"s",0,NULL,0,0,0,0,0},

     {"discard",discardCommand,1,"rs",0,NULL,0,0,0,0,0},
     {"sync",syncCommand,1,"ars",0,NULL,0,0,0,0,0},
     {"flushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},
     {"discard",discardCommand,1,"rs",0,NULL,0,0,0,0,0},
     {"sync",syncCommand,1,"ars",0,NULL,0,0,0,0,0},
     {"flushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},


@@ -222,14 +226,14 @@ 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},
     {"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},
-    {"debug",debugCommand,-2,"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},
     {"unsubscribe",unsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
     {"psubscribe",psubscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
     {"punsubscribe",punsubscribeCommand,-1,"rps",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},
     {"unsubscribe",unsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
     {"psubscribe",psubscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
     {"punsubscribe",punsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},

-    {"publish",publishCommand,3,"rpf",0,NULL,0,0,0,0,0},
+    {"publish",publishCommand,3,"pf",0,NULL,0,0,0,0,0},

     {"watch",watchCommand,-2,"rs",0,noPreloadGetKeys,1,-1,1,0,0},
     {"unwatch",unwatchCommand,1,"rs",0,NULL,0,0,0,0,0},
     {"cluster",clusterCommand,-2,"ar",0,NULL,0,0,0,0,0},
     {"watch",watchCommand,-2,"rs",0,noPreloadGetKeys,1,-1,1,0,0},
     {"unwatch",unwatchCommand,1,"rs",0,NULL,0,0,0,0,0},
     {"cluster",clusterCommand,-2,"ar",0,NULL,0,0,0,0,0},


@@ -239,8 +243,8 @@ struct redisCommand redisCommandTable[] = {
     {"dump",dumpCommand,2,"ar",0,NULL,1,1,1,0,0},
     {"object",objectCommand,-2,"r",0,NULL,2,2,2,0,0},
     {"client",clientCommand,-2,"ar",0,NULL,0,0,0,0,0},
     {"dump",dumpCommand,2,"ar",0,NULL,1,1,1,0,0},
     {"object",objectCommand,-2,"r",0,NULL,2,2,2,0,0},
     {"client",clientCommand,-2,"ar",0,NULL,0,0,0,0,0},

-    {"eval",evalCommand,-3,"wms",0,zunionInterGetKeys,0,0,0,0,0},
-    {"evalsha",evalShaCommand,-3,"wms",0,zunionInterGetKeys,0,0,0,0,0},
+    {"eval",evalCommand,-3,"s",0,zunionInterGetKeys,0,0,0,0,0},
+    {"evalsha",evalShaCommand,-3,"s",0,zunionInterGetKeys,0,0,0,0,0},

     {"slowlog",slowlogCommand,-2,"r",0,NULL,0,0,0,0,0},
     {"script",scriptCommand,-2,"ras",0,NULL,0,0,0,0,0},
     {"time",timeCommand,1,"rR",0,NULL,0,0,0,0,0}
     {"slowlog",slowlogCommand,-2,"r",0,NULL,0,0,0,0,0},
     {"script",scriptCommand,-2,"ras",0,NULL,0,0,0,0,0},
     {"time",timeCommand,1,"rR",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 = ".-*#";
 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);
     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 {
     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);
         fprintf(fp,"[%d] %s %c %s\n",(int)getpid(),buf,c[level],msg);
     }
     fflush(fp);


@@ -293,6 +301,35 @@ void redisLog(int level, const char *fmt, ...) {
     redisLogRaw(level,msg);
 }
 
     redisLogRaw(level,msg);
 }
 

+/* Log a fixed message without printf-alike capabilities, in a way that is
+ * safe to call from a signal handler.
+ *
+ * We actually use this only for signals that are not fatal from the point
+ * of view of Redis. Signals that are going to kill the server anyway and
+ * where we need printf-alike features are served by redisLog(). */
+void redisLogFromHandler(int level, const char *msg) {
+    int fd;
+    char buf[64];
+
+    if ((level&0xff) < server.verbosity ||
+        (server.logfile == NULL && server.daemonize)) return;
+    fd = server.logfile ?
+        open(server.logfile, O_APPEND|O_CREAT|O_WRONLY, 0644) :
+        STDOUT_FILENO;
+    if (fd == -1) return;
+    ll2string(buf,sizeof(buf),getpid());
+    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));
+    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
  * when allocating objects or strings, it is not clear if it will be possible
  * to report this condition to the client since the networking layer itself
 /* Redis generally does not try to recover from out of memory conditions
  * when allocating objects or strings, it is not clear if it will be possible
  * to report this condition to the client since the networking layer itself


@@ -320,6 +357,18 @@ long long mstime(void) {
     return ustime()/1000;
 }
 
     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
 /*====================== Hash table type implementation  ==================== */
 
 /* This is an hash table type that uses the SDS dynamic strings libary as


@@ -612,7 +661,7 @@ void activeExpireCycle(void) {
 }
 
 void updateLRUClock(void) {
 }
 
 void updateLRUClock(void) {

-    server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) &
+    server.lruclock = (server.unixtime/REDIS_LRU_CLOCK_RESOLUTION) &

                                                 REDIS_LRU_CLOCK_MAX;
 }
 
                                                 REDIS_LRU_CLOCK_MAX;
 }
 


@@ -726,6 +775,10 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
     REDIS_NOTUSED(id);
     REDIS_NOTUSED(clientData);
 
     REDIS_NOTUSED(id);
     REDIS_NOTUSED(clientData);
 

+    /* Software watchdog: deliver the SIGALRM that will reach the signal
+     * handler if we don't return here fast enough. */
+    if (server.watchdog_period) watchdogScheduleSignal(server.watchdog_period);
+

     /* We take a cached value of the unix time in the global state because
      * with virtual memory and aging there is to store the current time
      * in objects at every object access, and accuracy is not needed.
     /* We take a cached value of the unix time in the global state because
      * with virtual memory and aging there is to store the current time
      * in objects at every object access, and accuracy is not needed.


@@ -821,15 +874,13 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
             updateDictResizePolicy();
         }
     } else {
             updateDictResizePolicy();
         }
     } else {

-         time_t now = time(NULL);
-

         /* If there is not a background saving/rewrite in progress check if
          * we have to save/rewrite now */
          for (j = 0; j < server.saveparamslen; j++) {
             struct saveparam *sp = server.saveparams+j;
 
             if (server.dirty >= sp->changes &&
         /* If there is not a background saving/rewrite in progress check if
          * we have to save/rewrite now */
          for (j = 0; j < server.saveparamslen; j++) {
             struct saveparam *sp = server.saveparams+j;
 
             if (server.dirty >= sp->changes &&

-                now-server.lastsave > sp->seconds) {
+                server.unixtime-server.lastsave > sp->seconds) {

                 redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
                     sp->changes, sp->seconds);
                 rdbSaveBackground(server.rdb_filename);
                 redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
                     sp->changes, sp->seconds);
                 rdbSaveBackground(server.rdb_filename);


@@ -939,20 +990,19 @@ void createSharedObjects(void) {
     shared.slowscripterr = createObject(REDIS_STRING,sdsnew(
         "-BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.\r\n"));
     shared.bgsaveerr = createObject(REDIS_STRING,sdsnew(
     shared.slowscripterr = createObject(REDIS_STRING,sdsnew(
         "-BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.\r\n"));
     shared.bgsaveerr = createObject(REDIS_STRING,sdsnew(

-        "-MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Write commands are disabled. Please check Redis logs for details about the error.\r\n"));
+        "-MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.\r\n"));
+    shared.roslaveerr = createObject(REDIS_STRING,sdsnew(
+        "-READONLY You can't write against a read only slave.\r\n"));
+    shared.oomerr = createObject(REDIS_STRING,sdsnew(
+        "-OOM command not allowed when used memory > 'maxmemory'.\r\n"));

     shared.space = createObject(REDIS_STRING,sdsnew(" "));
     shared.colon = createObject(REDIS_STRING,sdsnew(":"));
     shared.plus = createObject(REDIS_STRING,sdsnew("+"));
     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);
     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);


@@ -1003,6 +1053,7 @@ void initServerConfig() {
     server.aof_rewrite_base_size = 0;
     server.aof_rewrite_scheduled = 0;
     server.aof_last_fsync = time(NULL);
     server.aof_rewrite_base_size = 0;
     server.aof_rewrite_scheduled = 0;
     server.aof_last_fsync = time(NULL);

+    server.aof_delayed_fsync = 0;

     server.aof_fd = -1;
     server.aof_selected_db = -1; /* Make sure the first time will not match */
     server.aof_flush_postponed_start = 0;
     server.aof_fd = -1;
     server.aof_selected_db = -1; /* Make sure the first time will not match */
     server.aof_flush_postponed_start = 0;


@@ -1011,6 +1062,7 @@ void initServerConfig() {
     server.aof_filename = zstrdup("appendonly.aof");
     server.requirepass = NULL;
     server.rdb_compression = 1;
     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;
     server.activerehashing = 1;
     server.maxclients = REDIS_MAX_CLIENTS;
     server.bpop_blocked_clients = 0;


@@ -1048,7 +1100,8 @@ void initServerConfig() {
     server.repl_state = REDIS_REPL_NONE;
     server.repl_syncio_timeout = REDIS_REPL_SYNCIO_TIMEOUT;
     server.repl_serve_stale_data = 1;
     server.repl_state = REDIS_REPL_NONE;
     server.repl_syncio_timeout = REDIS_REPL_SYNCIO_TIMEOUT;
     server.repl_serve_stale_data = 1;

-    server.repl_down_since = -1;
+    server.repl_slave_ro = 1;
+    server.repl_down_since = time(NULL);

 
     /* Client output buffer limits */
     server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].hard_limit_bytes = 0;
 
     /* Client output buffer limits */
     server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].hard_limit_bytes = 0;


@@ -1080,11 +1133,12 @@ void initServerConfig() {
     server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
     server.slowlog_max_len = REDIS_SLOWLOG_MAX_LEN;
 
     server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
     server.slowlog_max_len = REDIS_SLOWLOG_MAX_LEN;
 

-    /* Assert */
+    /* Debugging */

     server.assert_failed = "<no assertion failed>";
     server.assert_file = "<no file>";
     server.assert_line = 0;
     server.bug_report_start = 0;
     server.assert_failed = "<no assertion failed>";
     server.assert_file = "<no file>";
     server.assert_line = 0;
     server.bug_report_start = 0;

+    server.watchdog_period = 0;

 }
 
 /* This function will try to raise the max number of open files accordingly to
 }
 
 /* This function will try to raise the max number of open files accordingly to


@@ -1110,10 +1164,18 @@ void adjustOpenFilesLimit(void) {
         /* Set the max number of files if the current limit is not enough
          * for our needs. */
         if (oldlimit < maxfiles) {
         /* 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 {
                 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 {


@@ -1483,8 +1545,7 @@ int processCommand(redisClient *c) {
     if (server.maxmemory) {
         int retval = freeMemoryIfNeeded();
         if ((c->cmd->flags & REDIS_CMD_DENYOOM) && retval == REDIS_ERR) {
     if (server.maxmemory) {
         int retval = freeMemoryIfNeeded();
         if ((c->cmd->flags & REDIS_CMD_DENYOOM) && retval == REDIS_ERR) {

-            addReplyError(c,
-                "command not allowed when used memory > 'maxmemory'");
+            addReply(c, shared.oomerr);

             return REDIS_OK;
         }
     }
             return REDIS_OK;
         }
     }


@@ -1499,6 +1560,16 @@ int processCommand(redisClient *c) {
         return REDIS_OK;
     }
 
         return REDIS_OK;
     }
 

+    /* Don't accept wirte commands if this is a read only slave. But
+     * accept write commands if this is our master. */
+    if (server.masterhost && server.repl_slave_ro &&
+        !(c->flags & REDIS_MASTER) &&
+        c->cmd->flags & REDIS_CMD_WRITE)
+    {
+        addReply(c, shared.roslaveerr);
+        return REDIS_OK;
+    }
+

     /* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */
     if ((dictSize(c->pubsub_channels) > 0 || listLength(c->pubsub_patterns) > 0)
         &&
     /* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */
     if ((dictSize(c->pubsub_channels) > 0 || listLength(c->pubsub_patterns) > 0)
         &&


@@ -1668,7 +1739,7 @@ void bytesToHuman(char *s, unsigned long long n) {
  * on memory corruption problems. */
 sds genRedisInfoString(char *section) {
     sds info = sdsempty();
  * on memory corruption problems. */
 sds genRedisInfoString(char *section) {
     sds info = sdsempty();

-    time_t uptime = time(NULL)-server.stat_starttime;
+    time_t uptime = server.unixtime-server.stat_starttime;

     int j, numcommands;
     struct rusage self_ru, c_ru;
     unsigned long lol, bib;
     int j, numcommands;
     struct rusage self_ru, c_ru;
     unsigned long lol, bib;


@@ -1686,12 +1757,16 @@ sds genRedisInfoString(char *section) {
 
     /* Server */
     if (allsections || defsections || !strcasecmp(section,"server")) {
 
     /* Server */
     if (allsections || defsections || !strcasecmp(section,"server")) {

+        struct utsname name;
+

         if (sections++) info = sdscat(info,"\r\n");
         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"
         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"
             "arch_bits:%d\r\n"
             "multiplexing_api:%s\r\n"
             "gcc_version:%d.%d.%d\r\n"


@@ -1704,6 +1779,7 @@ sds genRedisInfoString(char *section) {
             REDIS_VERSION,
             redisGitSHA1(),
             strtol(redisGitDirty(),NULL,10) > 0,
             REDIS_VERSION,
             redisGitSHA1(),
             strtol(redisGitDirty(),NULL,10) > 0,

+            name.sysname, name.release, name.machine,

             server.arch_bits,
             aeGetApiName(),
 #ifdef __GNUC__
             server.arch_bits,
             aeGetApiName(),
 #ifdef __GNUC__


@@ -1773,14 +1849,16 @@ sds genRedisInfoString(char *section) {
             "bgsave_in_progress:%d\r\n"
             "last_save_time:%ld\r\n"
             "last_bgsave_status:%s\r\n"
             "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.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,
 
         if (server.aof_state != REDIS_AOF_OFF) {
             info = sdscatprintf(info,


@@ -1788,12 +1866,14 @@ sds genRedisInfoString(char *section) {
                 "aof_base_size:%lld\r\n"
                 "aof_pending_rewrite:%d\r\n"
                 "aof_buffer_length:%zu\r\n"
                 "aof_base_size:%lld\r\n"
                 "aof_pending_rewrite:%d\r\n"
                 "aof_buffer_length:%zu\r\n"

-                "aof_pending_bio_fsync:%llu\r\n",
+                "aof_pending_bio_fsync:%llu\r\n"
+                "aof_delayed_fsync:%lu\r\n",

                 (long long) server.aof_current_size,
                 (long long) server.aof_rewrite_base_size,
                 server.aof_rewrite_scheduled,
                 sdslen(server.aof_buf),
                 (long long) server.aof_current_size,
                 (long long) server.aof_rewrite_base_size,
                 server.aof_rewrite_scheduled,
                 sdslen(server.aof_buf),

-                bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC));
+                bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC),
+                server.aof_delayed_fsync);

         }
 
         if (server.loading) {
         }
 
         if (server.loading) {


@@ -1805,7 +1885,7 @@ sds genRedisInfoString(char *section) {
             perc = ((double)server.loading_loaded_bytes /
                    server.loading_total_bytes) * 100;
 
             perc = ((double)server.loading_loaded_bytes /
                    server.loading_total_bytes) * 100;
 

-            elapsed = time(NULL)-server.loading_start_time;
+            elapsed = server.unixtime-server.loading_start_time;

             if (elapsed == 0) {
                 eta = 1; /* A fake 1 second figure if we don't have
                             enough info */
             if (elapsed == 0) {
                 eta = 1; /* A fake 1 second figure if we don't have
                             enough info */


@@ -1876,7 +1956,7 @@ sds genRedisInfoString(char *section) {
                 (server.repl_state == REDIS_REPL_CONNECTED) ?
                     "up" : "down",
                 server.master ?
                 (server.repl_state == REDIS_REPL_CONNECTED) ?
                     "up" : "down",
                 server.master ?

-                ((int)(time(NULL)-server.master->lastinteraction)) : -1,
+                ((int)(server.unixtime-server.master->lastinteraction)) : -1,

                 server.repl_state == REDIS_REPL_TRANSFER
             );
 
                 server.repl_state == REDIS_REPL_TRANSFER
             );
 


@@ -1885,14 +1965,14 @@ sds genRedisInfoString(char *section) {
                     "master_sync_left_bytes:%ld\r\n"
                     "master_sync_last_io_seconds_ago:%d\r\n"
                     ,(long)server.repl_transfer_left,
                     "master_sync_left_bytes:%ld\r\n"
                     "master_sync_last_io_seconds_ago:%d\r\n"
                     ,(long)server.repl_transfer_left,

-                    (int)(time(NULL)-server.repl_transfer_lastio)
+                    (int)(server.unixtime-server.repl_transfer_lastio)

                 );
             }
 
             if (server.repl_state != REDIS_REPL_CONNECTED) {
                 info = sdscatprintf(info,
                     "master_link_down_since_seconds:%ld\r\n",
                 );
             }
 
             if (server.repl_state != REDIS_REPL_CONNECTED) {
                 info = sdscatprintf(info,
                     "master_link_down_since_seconds:%ld\r\n",

-                    (long)time(NULL)-server.repl_down_since);
+                    (long)server.unixtime-server.repl_down_since);

             }
         }
         info = sdscatprintf(info,
             }
         }
         info = sdscatprintf(info,


@@ -1962,7 +2042,7 @@ sds genRedisInfoString(char *section) {
         }
     }
 
         }
     }
 

-    /* Clusetr */
+    /* Cluster */

     if (allsections || defsections || !strcasecmp(section,"cluster")) {
         if (sections++) info = sdscat(info,"\r\n");
         info = sdscatprintf(info,
     if (allsections || defsections || !strcasecmp(section,"cluster")) {
         if (sections++) info = sdscat(info,"\r\n");
         info = sdscatprintf(info,


@@ -2222,8 +2302,8 @@ void daemonize(void) {
 }
 
 void version() {
 }
 
 void version() {

-    printf("Redis server version %s (%s:%d)\n", REDIS_VERSION,
-        redisGitSHA1(), atoi(redisGitDirty()) > 0);
+    printf("Redis server v=%s sha=%s:%d malloc=%s\n", REDIS_VERSION,
+        redisGitSHA1(), atoi(redisGitDirty()) > 0, ZMALLOC_LIB);

     exit(0);
 }
 
     exit(0);
 }
 


@@ -2231,7 +2311,8 @@ void usage() {
     fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf] [options]\n");
     fprintf(stderr,"       ./redis-server - (read config from stdin)\n");
     fprintf(stderr,"       ./redis-server -v or --version\n");
     fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf] [options]\n");
     fprintf(stderr,"       ./redis-server - (read config from stdin)\n");
     fprintf(stderr,"       ./redis-server -v or --version\n");

-    fprintf(stderr,"       ./redis-server -h or --help\n\n");
+    fprintf(stderr,"       ./redis-server -h or --help\n");
+    fprintf(stderr,"       ./redis-server --test-memory <megabytes>\n\n");

     fprintf(stderr,"Examples:\n");
     fprintf(stderr,"       ./redis-server (run the server with default conf)\n");
     fprintf(stderr,"       ./redis-server /etc/redis/6379.conf\n");
     fprintf(stderr,"Examples:\n");
     fprintf(stderr,"       ./redis-server (run the server with default conf)\n");
     fprintf(stderr,"       ./redis-server /etc/redis/6379.conf\n");


@@ -2261,21 +2342,30 @@ void redisAsciiArt(void) {
 static void sigtermHandler(int sig) {
     REDIS_NOTUSED(sig);
 
 static void sigtermHandler(int sig) {
     REDIS_NOTUSED(sig);
 

-    redisLog(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
+    redisLogFromHandler(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");

     server.shutdown_asap = 1;
 }
 
 void setupSignalHandlers(void) {
     struct sigaction act;
     server.shutdown_asap = 1;
 }
 
 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);
 
     /* 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
     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;
     sigemptyset(&act.sa_mask);
     act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
     act.sa_sigaction = sigsegvHandler;


@@ -2287,6 +2377,8 @@ void setupSignalHandlers(void) {
     return;
 }
 
     return;
 }
 

+void memtest(size_t megabytes, int passes);
+

 int main(int argc, char **argv) {
     long long start;
     struct timeval tv;
 int main(int argc, char **argv) {
     long long start;
     struct timeval tv;


@@ -2308,6 +2400,17 @@ int main(int argc, char **argv) {
             strcmp(argv[1], "--version") == 0) version();
         if (strcmp(argv[1], "--help") == 0 ||
             strcmp(argv[1], "-h") == 0) usage();
             strcmp(argv[1], "--version") == 0) version();
         if (strcmp(argv[1], "--help") == 0 ||
             strcmp(argv[1], "-h") == 0) usage();

+        if (strcmp(argv[1], "--test-memory") == 0) {
+            if (argc == 3) {
+                memtest(atoi(argv[2]),50);
+                exit(0);
+            } else {
+                fprintf(stderr,"Please specify the amount of memory to test in megabytes.\n");
+                fprintf(stderr,"Example: ./redis-server --test-memory 4096\n\n");
+                exit(1);
+            }
+        }
+

         /* First argument is the config file name? */
         if (argv[j][0] != '-' || argv[j][1] != '-')
             configfile = argv[j++];
         /* First argument is the config file name? */
         if (argv[j][0] != '-' || argv[j][1] != '-')
             configfile = argv[j++];