#include "server.h"

#include "sha1.h" /* SHA1 is used for DEBUG DIGEST */

#include "crc64.h"

#include <arpa/inet.h>

#include <signal.h>

#include <dlfcn.h>

#ifdef HAVE_BACKTRACE

#include <execinfo.h>

#include <ucontext.h>

#include <fcntl.h>

#include "bio.h"

#include <unistd.h>

#endif /* HAVE_BACKTRACE */

#ifdef __CYGWIN__

#ifndef SA_ONSTACK

#define SA_ONSTACK 0x08000000

void xorDigest(unsigned char *digest, void *ptr, size_t len) {

SHA1_CTX ctx;

unsigned char hash[20], *s = ptr;

int j;

SHA1Init(&ctx);

SHA1Update(&ctx,s,len);

SHA1Final(hash,&ctx);

for (j = 0; j < 20; j++)

digest[j] ^= hash[j];

}

void xorObjectDigest(unsigned char *digest, robj *o) {

o = getDecodedObject(o);

xorDigest(digest,o->ptr,sdslen(o->ptr));

decrRefCount(o);

}

void mixDigest(unsigned char *digest, void *ptr, size_t len) {

SHA1_CTX ctx;

char *s = ptr;

xorDigest(digest,s,len);

SHA1Init(&ctx);

SHA1Update(&ctx,digest,20);

SHA1Final(digest,&ctx);

}

void mixObjectDigest(unsigned char *digest, robj *o) {

o = getDecodedObject(o);

mixDigest(digest,o->ptr,sdslen(o->ptr));

decrRefCount(o);

}

void computeDatasetDigest(unsigned char *final) {

unsigned char digest[20];

char buf[128];

dictIterator *di = NULL;

dictEntry *de;

int j;

uint32_t aux;

memset(final,0,20); /* Start with a clean result */

for (j = 0; j < server.dbnum; j++) {

redisDb *db = server.db+j;

if (dictSize(db->dict) == 0) continue;

di = dictGetSafeIterator(db->dict);

/* hash the DB id, so the same dataset moved in a different

aux = htonl(j);

mixDigest(final,&aux,sizeof(aux));

/* Iterate this DB writing every entry */

while((de = dictNext(di)) != NULL) {

sds key;

robj *keyobj, *o;

long long expiretime;

memset(digest,0,20); /* This key-val digest */

key = dictGetKey(de);

keyobj = createStringObject(key,sdslen(key));

mixDigest(digest,key,sdslen(key));

o = dictGetVal(de);

aux = htonl(o->type);

mixDigest(digest,&aux,sizeof(aux));

expiretime = getExpire(db,keyobj);

/* Save the key and associated value */

if (o->type == OBJ_STRING) {

mixObjectDigest(digest,o);

} else if (o->type == OBJ_LIST) {

listTypeIterator *li = listTypeInitIterator(o,0,LIST_TAIL);

listTypeEntry entry;

while(listTypeNext(li,&entry)) {

robj *eleobj = listTypeGet(&entry);

mixObjectDigest(digest,eleobj);

decrRefCount(eleobj);

}

listTypeReleaseIterator(li);

} else if (o->type == OBJ_SET) {

setTypeIterator *si = setTypeInitIterator(o);

sds sdsele;

while((sdsele = setTypeNextObject(si)) != NULL) {

xorDigest(digest,sdsele,sdslen(sdsele));

sdsfree(sdsele);

}

setTypeReleaseIterator(si);

} else if (o->type == OBJ_ZSET) {

unsigned char eledigest[20];

if (o->encoding == OBJ_ENCODING_ZIPLIST) {

unsigned char *zl = o->ptr;

unsigned char *eptr, *sptr;

unsigned char *vstr;

unsigned int vlen;

long long vll;

double score;

eptr = ziplistIndex(zl,0);

serverAssert(eptr != NULL);

sptr = ziplistNext(zl,eptr);

serverAssert(sptr != NULL);

while (eptr != NULL) {

serverAssert(ziplistGet(eptr,&vstr,&vlen,&vll));

score = zzlGetScore(sptr);

memset(eledigest,0,20);

if (vstr != NULL) {

mixDigest(eledigest,vstr,vlen);

} else {

ll2string(buf,sizeof(buf),vll);

mixDigest(eledigest,buf,strlen(buf));

}

snprintf(buf,sizeof(buf),"%.17g",score);

mixDigest(eledigest,buf,strlen(buf));

xorDigest(digest,eledigest,20);

zzlNext(zl,&eptr,&sptr);

}

} else if (o->encoding == OBJ_ENCODING_SKIPLIST) {

zset *zs = o->ptr;

dictIterator *di = dictGetIterator(zs->dict);

dictEntry *de;

while((de = dictNext(di)) != NULL) {

sds sdsele = dictGetKey(de);

double *score = dictGetVal(de);

snprintf(buf,sizeof(buf),"%.17g",*score);

memset(eledigest,0,20);

mixDigest(eledigest,sdsele,sdslen(sdsele));

mixDigest(eledigest,buf,strlen(buf));

xorDigest(digest,eledigest,20);

}

dictReleaseIterator(di);

} else {

serverPanic("Unknown sorted set encoding");

}

} else if (o->type == OBJ_HASH) {

hashTypeIterator *hi = hashTypeInitIterator(o);

while (hashTypeNext(hi) != C_ERR) {

unsigned char eledigest[20];

sds sdsele;

memset(eledigest,0,20);

sdsele = hashTypeCurrentObjectNewSds(hi,OBJ_HASH_KEY);

mixDigest(eledigest,sdsele,sdslen(sdsele));

sdsfree(sdsele);

sdsele = hashTypeCurrentObjectNewSds(hi,OBJ_HASH_VALUE);

mixDigest(eledigest,sdsele,sdslen(sdsele));

sdsfree(sdsele);

xorDigest(digest,eledigest,20);

}

hashTypeReleaseIterator(hi);

} else if (o->type == OBJ_STREAM) {

streamIterator si;

streamIteratorStart(&si,o->ptr,NULL,NULL,0);

streamID id;

int64_t numfields;

while(streamIteratorGetID(&si,&id,&numfields)) {

sds itemid = sdscatfmt(sdsempty(),"%U.%U",id.ms,id.seq);

mixDigest(digest,itemid,sdslen(itemid));

sdsfree(itemid);

while(numfields--) {

unsigned char *field, *value;

int64_t field_len, value_len;

streamIteratorGetField(&si,&field,&value,

&field_len,&value_len);

mixDigest(digest,field,field_len);

mixDigest(digest,value,value_len);

}

}

streamIteratorStop(&si);

} else if (o->type == OBJ_MODULE) {

RedisModuleDigest md;

moduleValue *mv = o->ptr;

moduleType *mt = mv->type;

moduleInitDigestContext(md);

if (mt->digest) {

mt->digest(&md,mv->value);

xorDigest(digest,md.x,sizeof(md.x));

}

} else {

serverPanic("Unknown object type");

}

/* If the key has an expire, add it to the mix */

if (expiretime != -1) xorDigest(digest,"!!expire!!",10);

/* We can finally xor the key-val digest to the final digest */

xorDigest(final,digest,20);

decrRefCount(keyobj);

}

dictReleaseIterator(di);

}

}

void debugCommand(client *c) {

if (c->argc == 2 && !strcasecmp(c->argv[1]->ptr,"help")) {

const char *help[] = {

"ASSERT -- Crash by assertion failed.",

"CHANGE-REPL-ID -- Change the replication IDs of the instance. Dangerous, should be used only for testing the replication subsystem.",

"CRASH-AND-RECOVER <milliseconds> -- Hard crash and restart after <milliseconds> delay.",

"DIGEST -- Output a hex signature representing the current DB content.",

"ERROR <string> -- Return a Redis protocol error with <string> as message. Useful for clients unit tests to simulate Redis errors.",

"HTSTATS <dbid> -- Return hash table statistics of the specified Redis database.",

"HTSTATS-KEY <key> -- Like htstats but for the hash table stored as key's value.",

"LOADAOF -- Flush the AOF buffers on disk and reload the AOF in memory.",

"LUA-ALWAYS-REPLICATE-COMMANDS <0|1> -- Setting it to 1 makes Lua replication defaulting to replicating single commands, without the script having to enable effects replication.",

"OBJECT <key> -- Show low level info about key and associated value.",

"PANIC -- Crash the server simulating a panic.",

"POPULATE <count> [prefix] [size] -- Create <count> string keys named key:<num>. If a prefix is specified is used instead of the 'key' prefix.",

"RELOAD -- Save the RDB on disk and reload it back in memory.",

"RESTART -- Graceful restart: save config, db, restart.",

"SDSLEN <key> -- Show low level SDS string info representing key and value.",

"SEGFAULT -- Crash the server with sigsegv.",

"SET-ACTIVE-EXPIRE <0|1> -- Setting it to 0 disables expiring keys in background when they are not accessed (otherwise the Redis behavior). Setting it to 1 reenables back the default.",

"SLEEP <seconds> -- Stop the server for <seconds>. Decimals allowed.",

"STRUCTSIZE -- Return the size of different Redis core C structures.",

"ZIPLIST <key> -- Show low level info about the ziplist encoding.",

};

addReplyHelp(c, help);

} else if (!strcasecmp(c->argv[1]->ptr,"segfault")) {

*((char*)-1) = 'x';

} else if (!strcasecmp(c->argv[1]->ptr,"panic")) {

serverPanic("DEBUG PANIC called at Unix time %ld", time(NULL));

} else if (!strcasecmp(c->argv[1]->ptr,"restart") ||

!strcasecmp(c->argv[1]->ptr,"crash-and-recover"))

{

long long delay = 0;

if (c->argc >= 3) {

if (getLongLongFromObjectOrReply(c, c->argv[2], &delay, NULL)

!= C_OK) return;

if (delay < 0) delay = 0;

}

int flags = !strcasecmp(c->argv[1]->ptr,"restart") ?

(RESTART_SERVER_GRACEFULLY|RESTART_SERVER_CONFIG_REWRITE) :

RESTART_SERVER_NONE;

restartServer(flags,delay);

addReplyError(c,"failed to restart the server. Check server logs.");

} else if (!strcasecmp(c->argv[1]->ptr,"oom")) {

void *ptr = zmalloc(ULONG_MAX); /* Should trigger an out of memory. */

zfree(ptr);

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"assert")) {

if (c->argc >= 3) c->argv[2] = tryObjectEncoding(c->argv[2]);

serverAssertWithInfo(c,c->argv[0],1 == 2);

} else if (!strcasecmp(c->argv[1]->ptr,"reload")) {

rdbSaveInfo rsi, *rsiptr;

rsiptr = rdbPopulateSaveInfo(&rsi);

if (rdbSave(server.rdb_filename,rsiptr) != C_OK) {

addReply(c,shared.err);

return;

}

emptyDb(-1,EMPTYDB_NO_FLAGS,NULL);

if (rdbLoad(server.rdb_filename,NULL) != C_OK) {

addReplyError(c,"Error trying to load the RDB dump");

return;

}

serverLog(LL_WARNING,"DB reloaded by DEBUG RELOAD");

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"loadaof")) {

if (server.aof_state != AOF_OFF) flushAppendOnlyFile(1);

emptyDb(-1,EMPTYDB_NO_FLAGS,NULL);

if (loadAppendOnlyFile(server.aof_filename) != C_OK) {

addReply(c,shared.err);

return;

}

server.dirty = 0; /* Prevent AOF / replication */

serverLog(LL_WARNING,"Append Only File loaded by DEBUG LOADAOF");

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"object") && c->argc == 3) {

dictEntry *de;

robj *val;

char *strenc;

if ((de = dictFind(c->db->dict,c->argv[2]->ptr)) == NULL) {

addReply(c,shared.nokeyerr);

return;

}

val = dictGetVal(de);

strenc = strEncoding(val->encoding);

char extra[138] = {0};

if (val->encoding == OBJ_ENCODING_QUICKLIST) {

char *nextra = extra;

int remaining = sizeof(extra);

quicklist *ql = val->ptr;

/* Add number of quicklist nodes */

int used = snprintf(nextra, remaining, " ql_nodes:%lu", ql->len);

nextra += used;

remaining -= used;

/* Add average quicklist fill factor */

double avg = (double)ql->count/ql->len;

used = snprintf(nextra, remaining, " ql_avg_node:%.2f", avg);

nextra += used;

remaining -= used;

/* Add quicklist fill level / max ziplist size */

used = snprintf(nextra, remaining, " ql_ziplist_max:%d", ql->fill);

nextra += used;

remaining -= used;

/* Add isCompressed? */

int compressed = ql->compress != 0;

used = snprintf(nextra, remaining, " ql_compressed:%d", compressed);

nextra += used;

remaining -= used;

/* Add total uncompressed size */

unsigned long sz = 0;

for (quicklistNode *node = ql->head; node; node = node->next) {

sz += node->sz;

}

used = snprintf(nextra, remaining, " ql_uncompressed_size:%lu", sz);

nextra += used;

remaining -= used;

}

addReplyStatusFormat(c,

"Value at:%p refcount:%d "

"encoding:%s serializedlength:%zu "

"lru:%d lru_seconds_idle:%llu%s",

(void*)val, val->refcount,

strenc, rdbSavedObjectLen(val),

val->lru, estimateObjectIdleTime(val)/1000, extra);

} else if (!strcasecmp(c->argv[1]->ptr,"sdslen") && c->argc == 3) {

dictEntry *de;

robj *val;

sds key;

if ((de = dictFind(c->db->dict,c->argv[2]->ptr)) == NULL) {

addReply(c,shared.nokeyerr);

return;

}

val = dictGetVal(de);

key = dictGetKey(de);

if (val->type != OBJ_STRING || !sdsEncodedObject(val)) {

addReplyError(c,"Not an sds encoded string.");

} else {

addReplyStatusFormat(c,

"key_sds_len:%lld, key_sds_avail:%lld, key_zmalloc: %lld, "

"val_sds_len:%lld, val_sds_avail:%lld, val_zmalloc: %lld",

(long long) sdslen(key),

(long long) sdsavail(key),

(long long) sdsZmallocSize(key),

(long long) sdslen(val->ptr),

(long long) sdsavail(val->ptr),

(long long) getStringObjectSdsUsedMemory(val));

}

} else if (!strcasecmp(c->argv[1]->ptr,"ziplist") && c->argc == 3) {

robj *o;

if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nokeyerr))

== NULL) return;

if (o->encoding != OBJ_ENCODING_ZIPLIST) {

addReplyError(c,"Not an sds encoded string.");

} else {

ziplistRepr(o->ptr);

addReplyStatus(c,"Ziplist structure printed on stdout");

}

} else if (!strcasecmp(c->argv[1]->ptr,"populate") &&

c->argc >= 3 && c->argc <= 5) {

long keys, j;

robj *key, *val;

char buf[128];

if (getLongFromObjectOrReply(c, c->argv[2], &keys, NULL) != C_OK)

return;

dictExpand(c->db->dict,keys);

for (j = 0; j < keys; j++) {

long valsize = 0;

snprintf(buf,sizeof(buf),"%s:%lu",

(c->argc == 3) ? "key" : (char*)c->argv[3]->ptr, j);

key = createStringObject(buf,strlen(buf));

if (c->argc == 5)

if (getLongFromObjectOrReply(c, c->argv[4], &valsize, NULL) != C_OK)

return;

if (lookupKeyWrite(c->db,key) != NULL) {

decrRefCount(key);

continue;

}

snprintf(buf,sizeof(buf),"value:%lu",j);

if (valsize==0)

val = createStringObject(buf,strlen(buf));

else {

int buflen = strlen(buf);

val = createStringObject(NULL,valsize);

memcpy(val->ptr, buf, valsize<=buflen? valsize: buflen);

}

dbAdd(c->db,key,val);

signalModifiedKey(c->db,key);

decrRefCount(key);

}

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"digest") && c->argc == 2) {

unsigned char digest[20];

sds d = sdsempty();

int j;

computeDatasetDigest(digest);

for (j = 0; j < 20; j++)

d = sdscatprintf(d, "%02x",digest[j]);

addReplyStatus(c,d);

sdsfree(d);

} else if (!strcasecmp(c->argv[1]->ptr,"sleep") && c->argc == 3) {

double dtime = strtod(c->argv[2]->ptr,NULL);

long long utime = dtime*1000000;

struct timespec tv;

tv.tv_sec = utime / 1000000;

tv.tv_nsec = (utime % 1000000) * 1000;

nanosleep(&tv, NULL);

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"set-active-expire") &&

c->argc == 3)

{

server.active_expire_enabled = atoi(c->argv[2]->ptr);

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"lua-always-replicate-commands") &&

c->argc == 3)

{

server.lua_always_replicate_commands = atoi(c->argv[2]->ptr);

addReply(c,shared.ok);

} else if (!strcasecmp(c->argv[1]->ptr,"error") && c->argc == 3) {

sds errstr = sdsnewlen("-",1);

errstr = sdscatsds(errstr,c->argv[2]->ptr);

errstr = sdsmapchars(errstr,"\n\r"," ",2); /* no newlines in errors. */

errstr = sdscatlen(errstr,"\r\n",2);

addReplySds(c,errstr);

} else if (!strcasecmp(c->argv[1]->ptr,"structsize") && c->argc == 2) {

sds sizes = sdsempty();

sizes = sdscatprintf(sizes,"bits:%d ",(sizeof(void*) == 8)?64:32);

sizes = sdscatprintf(sizes,"robj:%d ",(int)sizeof(robj));

sizes = sdscatprintf(sizes,"dictentry:%d ",(int)sizeof(dictEntry));

sizes = sdscatprintf(sizes,"sdshdr5:%d ",(int)sizeof(struct sdshdr5));

sizes = sdscatprintf(sizes,"sdshdr8:%d ",(int)sizeof(struct sdshdr8));

sizes = sdscatprintf(sizes,"sdshdr16:%d ",(int)sizeof(struct sdshdr16));

sizes = sdscatprintf(sizes,"sdshdr32:%d ",(int)sizeof(struct sdshdr32));

sizes = sdscatprintf(sizes,"sdshdr64:%d ",(int)sizeof(struct sdshdr64));

addReplyBulkSds(c,sizes);

} else if (!strcasecmp(c->argv[1]->ptr,"htstats") && c->argc == 3) {

long dbid;

sds stats = sdsempty();

char buf[4096];

if (getLongFromObjectOrReply(c, c->argv[2], &dbid, NULL) != C_OK)

return;

if (dbid < 0 || dbid >= server.dbnum) {

addReplyError(c,"Out of range database");

return;

}

stats = sdscatprintf(stats,"[Dictionary HT]\n");

dictGetStats(buf,sizeof(buf),server.db[dbid].dict);

stats = sdscat(stats,buf);

stats = sdscatprintf(stats,"[Expires HT]\n");

dictGetStats(buf,sizeof(buf),server.db[dbid].expires);

stats = sdscat(stats,buf);

addReplyBulkSds(c,stats);

} else if (!strcasecmp(c->argv[1]->ptr,"htstats-key") && c->argc == 3) {

robj *o;

dict *ht = NULL;

if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nokeyerr))

== NULL) return;

/* Get the hash table reference from the object, if possible. */

switch (o->encoding) {

case OBJ_ENCODING_SKIPLIST:

{

zset *zs = o->ptr;

ht = zs->dict;

}

break;

case OBJ_ENCODING_HT:

ht = o->ptr;

break;

}

if (ht == NULL) {

addReplyError(c,"The value stored at the specified key is not "

"represented using an hash table");

} else {

char buf[4096];

dictGetStats(buf,sizeof(buf),ht);

addReplyBulkCString(c,buf);

}

} else if (!strcasecmp(c->argv[1]->ptr,"change-repl-id") && c->argc == 2) {

serverLog(LL_WARNING,"Changing replication IDs after receiving DEBUG change-repl-id");

changeReplicationId();

clearReplicationId2();

addReply(c,shared.ok);

} else {

addReplySubcommandSyntaxError(c);

return;

}

}

void _serverAssert(const char *estr, const char *file, int line) {

bugReportStart();

serverLog(LL_WARNING,"=== ASSERTION FAILED ===");

serverLog(LL_WARNING,"==> %s:%d '%s' is not true",file,line,estr);

#ifdef HAVE_BACKTRACE

server.assert_failed = estr;

server.assert_file = file;

server.assert_line = line;

serverLog(LL_WARNING,"(forcing SIGSEGV to print the bug report.)");

*((char*)-1) = 'x';

}

void _serverAssertPrintClientInfo(const client *c) {

int j;

bugReportStart();

serverLog(LL_WARNING,"=== ASSERTION FAILED CLIENT CONTEXT ===");

serverLog(LL_WARNING,"client->flags = %d", c->flags);

serverLog(LL_WARNING,"client->fd = %d", c->fd);

serverLog(LL_WARNING,"client->argc = %d", c->argc);

for (j=0; j < c->argc; j++) {

char buf[128];

char *arg;

if (c->argv[j]->type == OBJ_STRING && sdsEncodedObject(c->argv[j])) {

arg = (char*) c->argv[j]->ptr;

} else {

snprintf(buf,sizeof(buf),"Object type: %u, encoding: %u",

c->argv[j]->type, c->argv[j]->encoding);

arg = buf;

}

serverLog(LL_WARNING,"client->argv[%d] = \"%s\" (refcount: %d)",

j, arg, c->argv[j]->refcount);

}

}

void serverLogObjectDebugInfo(const robj *o) {

serverLog(LL_WARNING,"Object type: %d", o->type);

serverLog(LL_WARNING,"Object encoding: %d", o->encoding);

serverLog(LL_WARNING,"Object refcount: %d", o->refcount);

if (o->type == OBJ_STRING && sdsEncodedObject(o)) {

serverLog(LL_WARNING,"Object raw string len: %zu", sdslen(o->ptr));

if (sdslen(o->ptr) < 4096) {

sds repr = sdscatrepr(sdsempty(),o->ptr,sdslen(o->ptr));

serverLog(LL_WARNING,"Object raw string content: %s", repr);

sdsfree(repr);

}

} else if (o->type == OBJ_LIST) {

serverLog(LL_WARNING,"List length: %d", (int) listTypeLength(o));

} else if (o->type == OBJ_SET) {

serverLog(LL_WARNING,"Set size: %d", (int) setTypeSize(o));

} else if (o->type == OBJ_HASH) {

serverLog(LL_WARNING,"Hash size: %d", (int) hashTypeLength(o));

} else if (o->type == OBJ_ZSET) {

serverLog(LL_WARNING,"Sorted set size: %d", (int) zsetLength(o));

if (o->encoding == OBJ_ENCODING_SKIPLIST)

serverLog(LL_WARNING,"Skiplist level: %d", (int) ((const zset*)o->ptr)->zsl->level);

}

}

void _serverAssertPrintObject(const robj *o) {

bugReportStart();

serverLog(LL_WARNING,"=== ASSERTION FAILED OBJECT CONTEXT ===");

serverLogObjectDebugInfo(o);

}

void _serverAssertWithInfo(const client *c, const robj *o, const char *estr, const char *file, int line) {

if (c) _serverAssertPrintClientInfo(c);

if (o) _serverAssertPrintObject(o);

_serverAssert(estr,file,line);

}

void _serverPanic(const char *file, int line, const char *msg, ...) {

va_list ap;

va_start(ap,msg);

char fmtmsg[256];

vsnprintf(fmtmsg,sizeof(fmtmsg),msg,ap);

va_end(ap);

bugReportStart();

serverLog(LL_WARNING,"------------------------------------------------");

serverLog(LL_WARNING,"!!! Software Failure. Press left mouse button to continue");

serverLog(LL_WARNING,"Guru Meditation: %s #%s:%d",fmtmsg,file,line);

#ifdef HAVE_BACKTRACE

serverLog(LL_WARNING,"(forcing SIGSEGV in order to print the stack trace)");

serverLog(LL_WARNING,"------------------------------------------------");

*((char*)-1) = 'x';

}

void bugReportStart(void) {

if (server.bug_report_start == 0) {

serverLogRaw(LL_WARNING|LL_RAW,

"\n\n=== REDIS BUG REPORT START: Cut & paste starting from here ===\n");

server.bug_report_start = 1;

}

}

#ifdef HAVE_BACKTRACE

static void *getMcontextEip(ucontext_t *uc) {

#if defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)

/* OSX < 10.6 */

#if defined(__x86_64__)

return (void*) uc->uc_mcontext->__ss.__rip;

#elif defined(__i386__)

return (void*) uc->uc_mcontext->__ss.__eip;

#else

return (void*) uc->uc_mcontext->__ss.__srr0;

#endif

#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)

/* OSX >= 10.6 */

#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)

return (void*) uc->uc_mcontext->__ss.__rip;

#else

return (void*) uc->uc_mcontext->__ss.__eip;

#endif

#elif defined(__linux__)

/* Linux */

#if defined(__i386__)

return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */

#elif defined(__X86_64__) || defined(__x86_64__)

return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */

#elif defined(__ia64__) /* Linux IA64 */

return (void*) uc->uc_mcontext.sc_ip;

#elif defined(__arm__) /* Linux ARM */

return (void*) uc->uc_mcontext.arm_pc;

#elif defined(__aarch64__) /* Linux AArch64 */

return (void*) uc->uc_mcontext.pc;

#endif

return NULL;

}

void logStackContent(void **sp) {

int i;

for (i = 15; i >= 0; i--) {

unsigned long addr = (unsigned long) sp+i;

unsigned long val = (unsigned long) sp[i];

if (sizeof(long) == 4)

serverLog(LL_WARNING, "(%08lx) -> %08lx", addr, val);

else

serverLog(LL_WARNING, "(%016lx) -> %016lx", addr, val);

}

}

void logRegisters(ucontext_t *uc) {

serverLog(LL_WARNING|LL_RAW, "\n------ REGISTERS ------\n");

#if defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)

/* OSX AMD64 */

#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)

serverLog(LL_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\nCS :%016lx FS:%016lx GS:%016lx",

(unsigned long) uc->uc_mcontext->__ss.__rax,

(unsigned long) uc->uc_mcontext->__ss.__rbx,

(unsigned long) uc->uc_mcontext->__ss.__rcx,

(unsigned long) uc->uc_mcontext->__ss.__rdx,

(unsigned long) uc->uc_mcontext->__ss.__rdi,

(unsigned long) uc->uc_mcontext->__ss.__rsi,

(unsigned long) uc->uc_mcontext->__ss.__rbp,

(unsigned long) uc->uc_mcontext->__ss.__rsp,

(unsigned long) uc->uc_mcontext->__ss.__r8,

(unsigned long) uc->uc_mcontext->__ss.__r9,

(unsigned long) uc->uc_mcontext->__ss.__r10,

(unsigned long) uc->uc_mcontext->__ss.__r11,

(unsigned long) uc->uc_mcontext->__ss.__r12,

(unsigned long) uc->uc_mcontext->__ss.__r13,

(unsigned long) uc->uc_mcontext->__ss.__r14,

(unsigned long) uc->uc_mcontext->__ss.__r15,

(unsigned long) uc->uc_mcontext->__ss.__rip,

(unsigned long) uc->uc_mcontext->__ss.__rflags,

(unsigned long) uc->uc_mcontext->__ss.__cs,

(unsigned long) uc->uc_mcontext->__ss.__fs,

(unsigned long) uc->uc_mcontext->__ss.__gs

);

logStackContent((void**)uc->uc_mcontext->__ss.__rsp);

#else

/* OSX x86 */

serverLog(LL_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",

(unsigned long) uc->uc_mcontext->__ss.__eax,

(unsigned long) uc->uc_mcontext->__ss.__ebx,

(unsigned long) uc->uc_mcontext->__ss.__ecx,

(unsigned long) uc->uc_mcontext->__ss.__edx,

(unsigned long) uc->uc_mcontext->__ss.__edi,

(unsigned long) uc->uc_mcontext->__ss.__esi,

(unsigned long) uc->uc_mcontext->__ss.__ebp,

(unsigned long) uc->uc_mcontext->__ss.__esp,

(unsigned long) uc->uc_mcontext->__ss.__ss,

(unsigned long) uc->uc_mcontext->__ss.__eflags,

(unsigned long) uc->uc_mcontext->__ss.__eip,

(unsigned long) uc->uc_mcontext->__ss.__cs,

(unsigned long) uc->uc_mcontext->__ss.__ds,

(unsigned long) uc->uc_mcontext->__ss.__es,

(unsigned long) uc->uc_mcontext->__ss.__fs,

(unsigned long) uc->uc_mcontext->__ss.__gs

);

logStackContent((void**)uc->uc_mcontext->__ss.__esp);

#endif

#elif defined(__linux__)

/* Linux x86 */

#if defined(__i386__)

serverLog(LL_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",

(unsigned long) uc->uc_mcontext.gregs[11],

(unsigned long) uc->uc_mcontext.gregs[8],

(unsigned long) uc->uc_mcontext.gregs[10],

(unsigned long) uc->uc_mcontext.gregs[9],

(unsigned long) uc->uc_mcontext.gregs[4],

(unsigned long) uc->uc_mcontext.gregs[5],

(unsigned long) uc->uc_mcontext.gregs[6],

(unsigned long) uc->uc_mcontext.gregs[7],

(unsigned long) uc->uc_mcontext.gregs[18],

(unsigned long) uc->uc_mcontext.gregs[17],

(unsigned long) uc->uc_mcontext.gregs[14],

(unsigned long) uc->uc_mcontext.gregs[15],

(unsigned long) uc->uc_mcontext.gregs[3],

(unsigned long) uc->uc_mcontext.gregs[2],

(unsigned long) uc->uc_mcontext.gregs[1],

(unsigned long) uc->uc_mcontext.gregs[0]

);

logStackContent((void**)uc->uc_mcontext.gregs[7]);

#elif defined(__X86_64__) || defined(__x86_64__)

/* Linux AMD64 */

serverLog(LL_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",

(unsigned long) uc->uc_mcontext.gregs[13],

(unsigned long) uc->uc_mcontext.gregs[11],

(unsigned long) uc->uc_mcontext.gregs[14],

(unsigned long) uc->uc_mcontext.gregs[12],

(unsigned long) uc->uc_mcontext.gregs[8],

(unsigned long) uc->uc_mcontext.gregs[9],

(unsigned long) uc->uc_mcontext.gregs[10],

(unsigned long) uc->uc_mcontext.gregs[15],

(unsigned long) uc->uc_mcontext.gregs[0],

(unsigned long) uc->uc_mcontext.gregs[1],

(unsigned long) uc->uc_mcontext.gregs[2],

(unsigned long) uc->uc_mcontext.gregs[3],

(unsigned long) uc->uc_mcontext.gregs[4],

(unsigned long) uc->uc_mcontext.gregs[5],

(unsigned long) uc->uc_mcontext.gregs[6],

(unsigned long) uc->uc_mcontext.gregs[7],

(unsigned long) uc->uc_mcontext.gregs[16],

(unsigned long) uc->uc_mcontext.gregs[17],

(unsigned long) uc->uc_mcontext.gregs[18]

);

logStackContent((void**)uc->uc_mcontext.gregs[15]);

#endif

serverLog(LL_WARNING,

" Dumping of registers not supported for this OS/arch");

}

int openDirectLogFiledes(void) {

int log_to_stdout = server.logfile[0] == '\0';

int fd = log_to_stdout ?

STDOUT_FILENO :

open(server.logfile, O_APPEND|O_CREAT|O_WRONLY, 0644);

return fd;

}

void closeDirectLogFiledes(int fd) {

int log_to_stdout = server.logfile[0] == '\0';

if (!log_to_stdout) close(fd);

}

void logStackTrace(ucontext_t *uc) {

void *trace[101];

int trace_size = 0, fd = openDirectLogFiledes();

if (fd == -1) return; /* If we can't log there is anything to do. */

/* Generate the stack trace */

trace_size = backtrace(trace+1, 100);

if (getMcontextEip(uc) != NULL) {

char *msg1 = "EIP:\n";

char *msg2 = "\nBacktrace:\n";

if (write(fd,msg1,strlen(msg1)) == -1) {/* Avoid warning. */};

trace[0] = getMcontextEip(uc);

backtrace_symbols_fd(trace, 1, fd);

if (write(fd,msg2,strlen(msg2)) == -1) {/* Avoid warning. */};

}

/* Write symbols to log file */

backtrace_symbols_fd(trace+1, trace_size, fd);

/* Cleanup */

closeDirectLogFiledes(fd);

}

void logCurrentClient(void) {

if (server.current_client == NULL) return;

client *cc = server.current_client;

sds client;

int j;

serverLogRaw(LL_WARNING|LL_RAW, "\n------ CURRENT CLIENT INFO ------\n");

client = catClientInfoString(sdsempty(),cc);

serverLog(LL_WARNING|LL_RAW,"%s\n", client);

sdsfree(client);

for (j = 0; j < cc->argc; j++) {

robj *decoded;

decoded = getDecodedObject(cc->argv[j]);

serverLog(LL_WARNING|LL_RAW,"argv[%d]: '%s'\n", j,

(char*)decoded->ptr);

decrRefCount(decoded);

}

/* Check if the first argument, usually a key, is found inside the

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);

serverLog(LL_WARNING,"key '%s' found in DB containing the following object:", (char*)key->ptr);

serverLogObjectDebugInfo(val);

}

decrRefCount(key);

}

}

#if defined(HAVE_PROC_MAPS)

#define MEMTEST_MAX_REGIONS 128

int memtest_test_linux_anonymous_maps(void) {

FILE *fp;

char line[1024];

char logbuf[1024];

size_t start_addr, end_addr, size;

size_t start_vect[MEMTEST_MAX_REGIONS];

size_t size_vect[MEMTEST_MAX_REGIONS];

int regions = 0, j;

int fd = openDirectLogFiledes();

if (!fd) return 0;

fp = fopen("/proc/self/maps","r");

if (!fp) return 0;

while(fgets(line,sizeof(line),fp) != NULL) {

char *start, *end, *p = line;

start = p;

p = strchr(p,'-');

if (!p) continue;

*p++ = '\0';

end = p;

p = strchr(p,' ');

if (!p) continue;

*p++ = '\0';

if (strstr(p,"stack") ||

strstr(p,"vdso") ||

strstr(p,"vsyscall")) continue;

if (!strstr(p,"00:00")) continue;

if (!strstr(p,"rw")) continue;

start_addr = strtoul(start,NULL,16);

end_addr = strtoul(end,NULL,16);

size = end_addr-start_addr;

start_vect[regions] = start_addr;

size_vect[regions] = size;

snprintf(logbuf,sizeof(logbuf),