#include "redis.h"

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

#include "crc64.h"

#include <arpa/inet.h>

#include <signal.h>

#ifdef HAVE_BACKTRACE

#include <execinfo.h>

#include <ucontext.h>

#include <fcntl.h>

#include "bio.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 = dictGetIterator(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 == REDIS_STRING) {

mixObjectDigest(digest,o);

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

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

listTypeEntry entry;

while(listTypeNext(li,&entry)) {

robj *eleobj = listTypeGet(&entry);

mixObjectDigest(digest,eleobj);

decrRefCount(eleobj);

}

listTypeReleaseIterator(li);

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

setTypeIterator *si = setTypeInitIterator(o);

robj *ele;

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

xorObjectDigest(digest,ele);

decrRefCount(ele);

}

setTypeReleaseIterator(si);

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

unsigned char eledigest[20];

if (o->encoding == REDIS_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);

redisAssert(eptr != NULL);

sptr = ziplistNext(zl,eptr);

redisAssert(sptr != NULL);

while (eptr != NULL) {

redisAssert(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 == REDIS_ENCODING_SKIPLIST) {

zset *zs = o->ptr;

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

dictEntry *de;

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

robj *eleobj = dictGetKey(de);

double *score = dictGetVal(de);

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

memset(eledigest,0,20);

mixObjectDigest(eledigest,eleobj);

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

xorDigest(digest,eledigest,20);

}

dictReleaseIterator(di);

} else {

redisPanic("Unknown sorted set encoding");

}

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

hashTypeIterator *hi;

robj *obj;

hi = hashTypeInitIterator(o);

while (hashTypeNext(hi) != REDIS_ERR) {

unsigned char eledigest[20];

memset(eledigest,0,20);

obj = hashTypeCurrentObject(hi,REDIS_HASH_KEY);

mixObjectDigest(eledigest,obj);

decrRefCount(obj);

obj = hashTypeCurrentObject(hi,REDIS_HASH_VALUE);

mixObjectDigest(eledigest,obj);

decrRefCount(obj);

xorDigest(digest,eledigest,20);

}

hashTypeReleaseIterator(hi);

} else {

redisPanic("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 inputCatSds(void *result, const char *str) {

/* result is actually a (sds *), so re-cast it here */

sds *info = (sds *)result;

*info = sdscat(*info, str);

}

void debugCommand(redisClient *c) {

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

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

} 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]);

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

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

if (rdbSave(server.rdb_filename) != REDIS_OK) {

addReply(c,shared.err);

return;

}

emptyDb(NULL);

if (rdbLoad(server.rdb_filename) != REDIS_OK) {

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

return;

}

redisLog(REDIS_WARNING,"DB reloaded by DEBUG RELOAD");

addReply(c,shared.ok);

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

emptyDb(NULL);

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

addReply(c,shared.err);

return;

}

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

redisLog(REDIS_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[128] = {0};

if (val->encoding == REDIS_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:%u", 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:%lld "

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

(void*)val, val->refcount,

strenc, (long long) 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 != REDIS_STRING || !sdsEncodedObject(val)) {

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

} else {

addReplyStatusFormat(c,

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

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

(long long) sdslen(key),

(long long) sdsavail(key),

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

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

}

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

(c->argc == 3 || c->argc == 4)) {

long keys, j;

robj *key, *val;

char buf[128];

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

return;

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

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

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

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

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

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

decrRefCount(key);

continue;

}

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

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

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

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,"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,"sdshdr:%d", (int)sizeof(struct sdshdr));

addReplyBulkSds(c,sizes);

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

#if defined(USE_JEMALLOC)

if (!strcasecmp(c->argv[2]->ptr, "info")) {

sds info = sdsempty();

je_malloc_stats_print(inputCatSds, &info, NULL);

addReplyBulkSds(c, info);

} else {

addReplyErrorFormat(c, "Valid jemalloc debug fields: info");

}

addReplyErrorFormat(c, "jemalloc support not available");

} else {

addReplyErrorFormat(c, "Unknown DEBUG subcommand or wrong number of arguments for '%s'",

(char*)c->argv[1]->ptr);

}

}

void _redisAssert(char *estr, char *file, int line) {

bugReportStart();

redisLog(REDIS_WARNING,"=== ASSERTION FAILED ===");

redisLog(REDIS_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;

redisLog(REDIS_WARNING,"(forcing SIGSEGV to print the bug report.)");

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

}

void _redisAssertPrintClientInfo(redisClient *c) {

int j;

bugReportStart();

redisLog(REDIS_WARNING,"=== ASSERTION FAILED CLIENT CONTEXT ===");

redisLog(REDIS_WARNING,"client->flags = %d", c->flags);

redisLog(REDIS_WARNING,"client->fd = %d", c->fd);

redisLog(REDIS_WARNING,"client->argc = %d", c->argc);

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

char buf[128];

char *arg;

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

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

} else {

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

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

arg = buf;

}

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

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

}

}

void redisLogObjectDebugInfo(robj *o) {

redisLog(REDIS_WARNING,"Object type: %d", o->type);

redisLog(REDIS_WARNING,"Object encoding: %d", o->encoding);

redisLog(REDIS_WARNING,"Object refcount: %d", o->refcount);

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

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

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

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

redisLog(REDIS_WARNING,"Object raw string content: %s", repr);

sdsfree(repr);

}

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

redisLog(REDIS_WARNING,"List length: %d", (int) listTypeLength(o));

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

redisLog(REDIS_WARNING,"Set size: %d", (int) setTypeSize(o));

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

redisLog(REDIS_WARNING,"Hash size: %d", (int) hashTypeLength(o));

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

redisLog(REDIS_WARNING,"Sorted set size: %d", (int) zsetLength(o));

if (o->encoding == REDIS_ENCODING_SKIPLIST)

redisLog(REDIS_WARNING,"Skiplist level: %d", (int) ((zset*)o->ptr)->zsl->level);

}

}

void _redisAssertPrintObject(robj *o) {

bugReportStart();

redisLog(REDIS_WARNING,"=== ASSERTION FAILED OBJECT CONTEXT ===");

redisLogObjectDebugInfo(o);

}

void _redisAssertWithInfo(redisClient *c, robj *o, char *estr, char *file, int line) {

if (c) _redisAssertPrintClientInfo(c);

if (o) _redisAssertPrintObject(o);

_redisAssert(estr,file,line);

}

void _redisPanic(char *msg, char *file, int line) {

bugReportStart();

redisLog(REDIS_WARNING,"------------------------------------------------");

redisLog(REDIS_WARNING,"!!! Software Failure. Press left mouse button to continue");

redisLog(REDIS_WARNING,"Guru Meditation: %s #%s:%d",msg,file,line);

#ifdef HAVE_BACKTRACE

redisLog(REDIS_WARNING,"(forcing SIGSEGV in order to print the stack trace)");

redisLog(REDIS_WARNING,"------------------------------------------------");

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

}

void bugReportStart(void) {

if (server.bug_report_start == 0) {

redisLog(REDIS_WARNING,

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

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;

#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)

redisLog(REDIS_WARNING, "(%08lx) -> %08lx", addr, val);

else

redisLog(REDIS_WARNING, "(%016lx) -> %016lx", addr, val);

}

}

void logRegisters(ucontext_t *uc) {

redisLog(REDIS_WARNING, "--- REGISTERS");

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

/* OSX AMD64 */

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

redisLog(REDIS_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 */

redisLog(REDIS_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__)

redisLog(REDIS_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 */

redisLog(REDIS_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

redisLog(REDIS_WARNING,

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

}

void logStackTrace(ucontext_t *uc) {

void *trace[100];

int trace_size = 0, fd;

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

/* Open the log file in append mode. */

fd = log_to_stdout ?

STDOUT_FILENO :

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

if (fd == -1) return;

/* Generate the stack trace */

trace_size = backtrace(trace, 100);

/* overwrite sigaction with caller's address */

if (getMcontextEip(uc) != NULL)

trace[1] = getMcontextEip(uc);

/* Write symbols to log file */

backtrace_symbols_fd(trace, trace_size, fd);

/* Cleanup */

if (!log_to_stdout) close(fd);

}

void logCurrentClient(void) {

if (server.current_client == NULL) return;

redisClient *cc = server.current_client;

sds client;

int j;

redisLog(REDIS_WARNING, "--- CURRENT CLIENT INFO");

client = catClientInfoString(sdsempty(),cc);

redisLog(REDIS_WARNING,"client: %s", client);

sdsfree(client);

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

robj *decoded;

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

redisLog(REDIS_WARNING,"argv[%d]: '%s'", 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);

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

redisLogObjectDebugInfo(val);

}

decrRefCount(key);

}

}

#if defined(HAVE_PROC_MAPS)

void memtest_non_destructive_invert(void *addr, size_t size);

void memtest_non_destructive_swap(void *addr, size_t size);

#define MEMTEST_MAX_REGIONS 128

int memtest_test_linux_anonymous_maps(void) {

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

char line[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;

uint64_t crc1 = 0, crc2 = 0, crc3 = 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;

printf("Testing %lx %lu\n", (unsigned long) start_vect[regions],

(unsigned long) size_vect[regions]);

regions++;

}

/* Test all the regions as an unique sequential region.

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

crc1 = crc64(crc1,(void*)start_vect[j],size_vect[j]);

}

/* 2) Invert bits, swap adjacent words, swap again, invert bits.

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

memtest_non_destructive_invert((void*)start_vect[j],size_vect[j]);

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

memtest_non_destructive_swap((void*)start_vect[j],size_vect[j]);

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

memtest_non_destructive_swap((void*)start_vect[j],size_vect[j]);

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

memtest_non_destructive_invert((void*)start_vect[j],size_vect[j]);

/* 3) Take the CRC64 sum again. */

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

crc2 = crc64(crc2,(void*)start_vect[j],size_vect[j]);

/* 4) Swap + Swap again */

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

memtest_non_destructive_swap((void*)start_vect[j],size_vect[j]);

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

memtest_non_destructive_swap((void*)start_vect[j],size_vect[j]);

/* 5) Take the CRC64 sum again. */

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

crc3 = crc64(crc3,(void*)start_vect[j],size_vect[j]);

/* NOTE: It is very important to close the file descriptor only now

fclose(fp);

/* If the two CRC are not the same, we trapped a memory error. */

return crc1 != crc2 || crc2 != crc3;

}

void sigsegvHandler(int sig, siginfo_t *info, void *secret) {

ucontext_t *uc = (ucontext_t*) secret;

sds infostring, clients;

struct sigaction act;

REDIS_NOTUSED(info);

bugReportStart();

redisLog(REDIS_WARNING,

" Redis %s crashed by signal: %d", REDIS_VERSION, sig);

redisLog(REDIS_WARNING,

" Failed assertion: %s (%s:%d)", server.assert_failed,

server.assert_file, server.assert_line);

/* Log the stack trace */

redisLog(REDIS_WARNING, "--- STACK TRACE");

logStackTrace(uc);

/* Log INFO and CLIENT LIST */

redisLog(REDIS_WARNING, "--- INFO OUTPUT");

infostring = genRedisInfoString("all");

infostring = sdscatprintf(infostring, "hash_init_value: %u\n",

dictGetHashFunctionSeed());

redisLogRaw(REDIS_WARNING, infostring);

redisLog(REDIS_WARNING, "--- CLIENT LIST OUTPUT");

clients = getAllClientsInfoString();

redisLogRaw(REDIS_WARNING, clients);

sdsfree(infostring);

sdsfree(clients);

/* Log the current client */

logCurrentClient();

/* Log dump of processor registers */

logRegisters(uc);

#if defined(HAVE_PROC_MAPS)

/* Test memory */

redisLog(REDIS_WARNING, "--- FAST MEMORY TEST");

bioKillThreads();

if (memtest_test_linux_anonymous_maps()) {

redisLog(REDIS_WARNING,

"!!! MEMORY ERROR DETECTED! Check your memory ASAP !!!");

} else {

redisLog(REDIS_WARNING,

"Fast memory test PASSED, however your memory can still be broken. Please run a memory test for several hours if possible.");

}

redisLog(REDIS_WARNING,

);

/* free(messages); Don't call free() with possibly corrupted memory. */

if (server.daemonize && server.supervised == 0) unlink(server.pidfile);

/* Make sure we exit with the right signal at the end. So for instance

sigemptyset (&act.sa_mask);

act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;

act.sa_handler = SIG_DFL;

sigaction (sig, &act, NULL);

kill(getpid(),sig);

}

#endif /* HAVE_BACKTRACE */

void redisLogHexDump(int level, char *descr, void *value, size_t len) {

char buf[65], *b;

unsigned char *v = value;

char charset[] = "0123456789abcdef";

redisLog(level,"%s (hexdump):", descr);

b = buf;

while(len) {

b[0] = charset[(*v)>>4];

b[1] = charset[(*v)&0xf];

b[2] = '\0';

b += 2;

len--;

v++;

if (b-buf == 64 || len == 0) {

redisLogRaw(level|REDIS_LOG_RAW,buf);

b = buf;

}

}

redisLogRaw(level|REDIS_LOG_RAW,"\n");

}

#include <sys/time.h>

void watchdogSignalHandler(int sig, siginfo_t *info, void *secret) {

#ifdef HAVE_BACKTRACE

ucontext_t *uc = (ucontext_t*) secret;

REDIS_NOTUSED(info);

REDIS_NOTUSED(sig);

redisLogFromHandler(REDIS_WARNING,"\n--- WATCHDOG TIMER EXPIRED ---");

#ifdef HAVE_BACKTRACE

logStackTrace(uc);

redisLogFromHandler(REDIS_WARNING,"Sorry: no support for backtrace().");

redisLogFromHandler(REDIS_WARNING,"--------\n");

}

void watchdogScheduleSignal(int period) {

struct itimerval it;

/* Will stop the timer if period is 0. */

it.it_value.tv_sec = period/1000;

it.it_value.tv_usec = (period%1000)*1000;

/* Don't automatically restart. */

it.it_interval.tv_sec = 0;

it.it_interval.tv_usec = 0;

setitimer(ITIMER_REAL, &it, NULL);

}

void enableWatchdog(int period) {

int min_period;

if (server.watchdog_period == 0) {

struct sigaction act;

/* Watchdog was actually disabled, so we have to setup the signal

sigemptyset(&act.sa_mask);

act.sa_flags = SA_ONSTACK | SA_SIGINFO;

act.sa_sigaction = watchdogSignalHandler;

sigaction(SIGALRM, &act, NULL);