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debug.cpp
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/*
* Copyright (c) 2009-2020, Salvatore Sanfilippo <antirez at gmail dot com>
* Copyright (c) 2020, Redis Labs, Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Redis nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define NO_DEPRECATE_FREE 1 // we are required to call the real free() in this CU
#include "server.h"
#include "sha1.h" /* SHA1 is used for DEBUG DIGEST */
#include "crc64.h"
#include "cron.h"
#include "bio.h"
#include <arpa/inet.h>
#include <signal.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <unistd.h>
#ifdef HAVE_BACKTRACE
#include <execinfo.h>
#ifndef __OpenBSD__
#include <ucontext.h>
#else
typedef ucontext_t sigcontext_t;
#endif
#include <cxxabi.h>
#endif /* HAVE_BACKTRACE */
//UNW_LOCAL_ONLY being set means we use libunwind for backtraces instead of execinfo
#ifdef UNW_LOCAL_ONLY
#include <libunwind.h>
#include <cxxabi.h>
#endif
#ifdef __CYGWIN__
#ifndef SA_ONSTACK
#define SA_ONSTACK 0x08000000
#endif
#endif
int g_fInCrash = false;
#if defined(__APPLE__) && defined(__arm64__)
#include <mach/mach.h>
#endif
/* Globals */
static int bug_report_start = 0; /* True if bug report header was already logged. */
static pthread_mutex_t bug_report_start_mutex = PTHREAD_MUTEX_INITIALIZER;
/* Forward declarations */
void bugReportStart(void);
void printCrashReport(void);
void bugReportEnd(int killViaSignal, int sig);
void logStackTrace(void *eip, int uplevel);
void getTempFileName(char tmpfile[], int tmpfileNum);
bool initializeStorageProvider(const char **err);
/* ================================= Debugging ============================== */
/* Compute the sha1 of string at 's' with 'len' bytes long.
* The SHA1 is then xored against the string pointed by digest.
* Since xor is commutative, this operation is used in order to
* "add" digests relative to unordered elements.
*
* So digest(a,b,c,d) will be the same of digest(b,a,c,d) */
void xorDigest(unsigned char *digest, const void *ptr, size_t len) {
SHA1_CTX ctx;
unsigned char hash[20];
const unsigned char *s = (const unsigned char*)ptr;
int j;
SHA1Init(&ctx);
SHA1Update(&ctx,s,len);
SHA1Final(hash,&ctx);
for (j = 0; j < 20; j++)
digest[j] ^= hash[j];
}
void xorStringObjectDigest(unsigned char *digest, robj *o) {
o = getDecodedObject(o);
xorDigest(digest,(const unsigned char*)ptrFromObj(o),sdslen(szFromObj(o)));
decrRefCount(o);
}
/* This function instead of just computing the SHA1 and xoring it
* against digest, also perform the digest of "digest" itself and
* replace the old value with the new one.
*
* So the final digest will be:
*
* digest = SHA1(digest xor SHA1(data))
*
* This function is used every time we want to preserve the order so
* that digest(a,b,c,d) will be different than digest(b,c,d,a)
*
* Also note that mixdigest("foo") followed by mixdigest("bar")
* will lead to a different digest compared to "fo", "obar".
*/
void mixDigest(unsigned char *digest, const void *ptr, size_t len) {
SHA1_CTX ctx;
const char *s = (const char*)ptr;
xorDigest(digest,s,len);
SHA1Init(&ctx);
SHA1Update(&ctx,digest,20);
SHA1Final(digest,&ctx);
}
void mixStringObjectDigest(unsigned char *digest, robj_roptr o) {
o = getDecodedObject(o);
mixDigest(digest,ptrFromObj(o),sdslen(szFromObj(o)));
decrRefCount(o);
}
/* This function computes the digest of a data structure stored in the
* object 'o'. It is the core of the DEBUG DIGEST command: when taking the
* digest of a whole dataset, we take the digest of the key and the value
* pair, and xor all those together.
*
* Note that this function does not reset the initial 'digest' passed, it
* will continue mixing this object digest to anything that was already
* present. */
void xorObjectDigest(unsigned char *digest, robj_roptr o) {
uint32_t aux = htonl(o->type);
mixDigest(digest,&aux,sizeof(aux));
const expireEntry *pexpire = o->FExpires() ? &o->expire : nullptr;
long long expiretime = INVALID_EXPIRE;
char buf[128];
if (pexpire != nullptr)
pexpire->FGetPrimaryExpire(&expiretime);
/* Save the key and associated value */
if (o->type == OBJ_STRING) {
mixStringObjectDigest(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);
mixStringObjectDigest(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 = (unsigned char*)ptrFromObj(o);
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 = (zset*)ptrFromObj(o);
dictIterator *di = dictGetIterator(zs->dict);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
sds sdsele = (sds)dictGetKey(de);
double *score = (double*)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,(stream*)ptrFromObj(o),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 = {{0},{0}};
moduleValue *mv = (moduleValue*)ptrFromObj(o);
moduleType *mt = mv->type;
moduleInitDigestContext(md);
if (mt->digest) {
mt->digest(&md,mv->value);
xorDigest(digest,md.x,sizeof(md.x));
}
} else if (o->type == OBJ_CRON) {
cronjob *job = (cronjob*)ptrFromObj(o);
mixDigest(digest, &job->interval, sizeof(job->interval));
mixDigest(digest, job->script.get(), job->script.size());
} else {
serverPanic("Unknown object type");
}
/* If the key has an expire, add it to the mix */
if (expiretime != INVALID_EXPIRE) xorDigest(digest,"!!expire!!",10);
}
/* Compute the dataset digest. Since keys, sets elements, hashes elements
* are not ordered, we use a trick: every aggregate digest is the xor
* of the digests of their elements. This way the order will not change
* the result. For list instead we use a feedback entering the output digest
* as input in order to ensure that a different ordered list will result in
* a different digest. */
void computeDatasetDigest(unsigned char *final) {
int j;
uint32_t aux;
memset(final,0,20); /* Start with a clean result */
for (j = 0; j < cserver.dbnum; j++) {
redisDb *db = g_pserver->db[j];
if (db->size() == 0) continue;
/* hash the DB id, so the same dataset moved in a different
* DB will lead to a different digest */
aux = htonl(j);
mixDigest(final,&aux,sizeof(aux));
/* Iterate this DB writing every entry */
db->iterate_threadsafe([final](const char *key, robj_roptr o)->bool {
unsigned char digest[20];
robj *keyobj;
memset(digest,0,20); /* This key-val digest */
keyobj = createStringObject(key,sdslen(key));
mixDigest(digest,key,sdslen(key));
xorObjectDigest(digest,o);
/* We can finally xor the key-val digest to the final digest */
xorDigest(final,digest,20);
decrRefCount(keyobj);
return true;
});
}
}
#ifdef USE_JEMALLOC
void mallctl_int(client *c, robj **argv, int argc) {
int ret;
/* start with the biggest size (int64), and if that fails, try smaller sizes (int32, bool) */
int64_t old = 0, val;
if (argc > 1) {
long long ll;
if (getLongLongFromObjectOrReply(c, argv[1], &ll, NULL) != C_OK)
return;
val = ll;
}
size_t sz = sizeof(old);
while (sz > 0) {
if ((ret=mallctl(szFromObj(argv[0]), &old, &sz, argc > 1? &val: NULL, argc > 1?sz: 0))) {
if (ret == EPERM && argc > 1) {
/* if this option is write only, try just writing to it. */
if (!(ret=mallctl(szFromObj(argv[0]), NULL, 0, &val, sz))) {
addReply(c, shared.ok);
return;
}
}
if (ret==EINVAL) {
/* size might be wrong, try a smaller one */
sz /= 2;
#if BYTE_ORDER == BIG_ENDIAN
val <<= 8*sz;
#endif
continue;
}
addReplyErrorFormat(c,"%s", strerror(ret));
return;
} else {
#if BYTE_ORDER == BIG_ENDIAN
old >>= 64 - 8*sz;
#endif
addReplyLongLong(c, old);
return;
}
}
addReplyErrorFormat(c,"%s", strerror(EINVAL));
}
void mallctl_string(client *c, robj **argv, int argc) {
int rret, wret;
char *old;
size_t sz = sizeof(old);
/* for strings, it seems we need to first get the old value, before overriding it. */
if ((rret=mallctl(szFromObj(argv[0]), &old, &sz, NULL, 0))) {
/* return error unless this option is write only. */
if (!(rret == EPERM && argc > 1)) {
addReplyErrorFormat(c,"%s", strerror(rret));
return;
}
}
if(argc > 1) {
char *val = szFromObj(argv[1]);
char **valref = &val;
if ((!strcmp(val,"VOID")))
valref = NULL, sz = 0;
wret = mallctl(szFromObj(argv[0]), NULL, 0, valref, sz);
}
if (!rret)
addReplyBulkCString(c, old);
else if (wret)
addReplyErrorFormat(c,"%s", strerror(wret));
else
addReply(c, shared.ok);
}
#endif
void debugCommand(client *c) {
if (c->argc == 2 && !strcasecmp(szFromObj(c->argv[1]),"help")) {
const char *help[] = {
"AOF-FLUSH-SLEEP <microsec>",
" Server will sleep before flushing the AOF, this is used for testing.",
"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.",
"CONFIG-REWRITE-FORCE-ALL",
" Like CONFIG REWRITE but writes all configuration options, including",
" keywords not listed in original configuration file or default values.",
"CRASH-AND-RECOVER <milliseconds>",
" Hard crash and restart after a <milliseconds> delay.",
"DIGEST",
" Output a hex signature representing the current DB content.",
"DIGEST-VALUE <key> [<key> ...]",
" Output a hex signature of the values of all the specified keys.",
"ERROR <string>",
" Return a Redis protocol error with <string> as message. Useful for clients",
" unit tests to simulate Redis errors.",
"LOG <message>",
" Write <message> to the server log.",
"HTSTATS <dbid>",
" Return hash table statistics of the specified Redis database.",
"HTSTATS-KEY <key>",
" Like HTSTATS but for the hash table stored at <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.",
#ifdef USE_JEMALLOC
"MALLCTL <key> [<val>]",
" Get or set a malloc tuning integer.",
"MALLCTL-STR <key> [<val>]",
" Get or set a malloc tuning string.",
#endif
"OBJECT <key>",
" Show low level info about `key` and associated value.",
"OOM",
" Crash the server simulating an out-of-memory error.",
"PANIC",
" Crash the server simulating a panic.",
"POPULATE <count> [<prefix>] [<size>]",
" Create <count> string keys named key:<num>. If <prefix> is specified then",
" it is used instead of the 'key' prefix.",
"DEBUG PROTOCOL <type>",
" Reply with a test value of the specified type. <type> can be: string,",
" integer, double, bignum, null, array, set, map, attrib, push, verbatim,",
" true, false.",
"RELOAD [option ...]",
" Save the RDB on disk and reload it back to memory. Valid <option> values:",
" * MERGE: conflicting keys will be loaded from RDB.",
" * NOFLUSH: the existing database will not be removed before load, but",
" conflicting keys will generate an exception and kill the server."
" * NOSAVE: the database will be loaded from an existing RDB file.",
" Examples:",
" * DEBUG RELOAD: verify that the server is able to persist, flush and reload",
" the database.",
" * DEBUG RELOAD NOSAVE: replace the current database with the contents of an",
" existing RDB file.",
" * DEBUG RELOAD NOSAVE NOFLUSH MERGE: add the contents of an existing RDB",
" file to the database.",
"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.",
"SET-SKIP-CHECKSUM-VALIDATION <0|1>",
" Enables or disables checksum checks for RDB files and RESTORE's payload.",
"SLEEP <seconds>",
" Stop the server for <seconds>. Decimals allowed.",
"STRINGMATCH-TEST",
" Run a fuzz tester against the stringmatchlen() function.",
"STRUCTSIZE",
" Return the size of different Redis core C structures.",
"ZIPLIST <key>",
" Show low level info about the ziplist encoding of <key>.",
NULL
};
addReplyHelp(c, help);
} else if (!strcasecmp(szFromObj(c->argv[1]),"segfault")) {
*((char*)-1) = 'x';
} else if (!strcasecmp(szFromObj(c->argv[1]),"panic")) {
serverPanic("DEBUG PANIC called at Unix time %lld", (long long)time(NULL));
} else if (!strcasecmp(szFromObj(c->argv[1]),"restart") ||
!strcasecmp(szFromObj(c->argv[1]),"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(szFromObj(c->argv[1]),"restart") ?
(RESTART_SERVER_GRACEFULLY|RESTART_SERVER_CONFIG_REWRITE) :
RESTART_SERVER_NONE;
restartServer(flags,delay);
addReplyError(c,"failed to restart the g_pserver-> Check server logs.");
} else if (!strcasecmp(szFromObj(c->argv[1]),"oom")) {
void *ptr = zmalloc(ULONG_MAX, MALLOC_LOCAL); /* Should trigger an out of memory. */
zfree(ptr);
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"assert")) {
serverAssertWithInfo(c,c->argv[0],1 == 2);
} else if (!strcasecmp(szFromObj(c->argv[1]),"log") && c->argc == 3) {
serverLog(LL_WARNING, "DEBUG LOG: %s", (char*)ptrFromObj(c->argv[2]));
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"leak") && c->argc == 3) {
sdsdup(szFromObj(c->argv[2]));
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"reload")) {
int flush = 1, save = 1;
int flags = RDBFLAGS_NONE;
/* Parse the additional options that modify the RELOAD
* behavior. */
for (int j = 2; j < c->argc; j++) {
char *opt = szFromObj(c->argv[j]);
if (!strcasecmp(opt,"MERGE")) {
flags |= RDBFLAGS_ALLOW_DUP;
} else if (!strcasecmp(opt,"NOFLUSH")) {
flush = 0;
} else if (!strcasecmp(opt,"NOSAVE")) {
save = 0;
} else {
addReplyError(c,"DEBUG RELOAD only supports the "
"MERGE, NOFLUSH and NOSAVE options.");
return;
}
}
if (g_pserver->m_pstorageFactory) {
protectClient(c);
for (int idb = 0; idb < cserver.dbnum; ++idb) {
if (g_pserver->db[idb]->processChanges(false))
g_pserver->db[idb]->commitChanges();
g_pserver->db[idb]->storageProviderDelete();
}
delete g_pserver->metadataDb;
if (flush) emptyDb(-1,EMPTYDB_NO_FLAGS,NULL);
delete g_pserver->m_pstorageFactory;
const char *err;
if (!initializeStorageProvider(&err))
{
serverLog(LL_WARNING, "Failed to initialize storage provider: %s",err);
exit(EXIT_FAILURE);
}
g_pserver->metadataDb = g_pserver->m_pstorageFactory->createMetadataDb();
for (int idb = 0; idb < cserver.dbnum; ++idb)
{
int dbid = idb;
std::string dbid_key = "db-" + std::to_string(idb);
g_pserver->metadataDb->retrieve(dbid_key.c_str(), dbid_key.length(), [&](const char *, size_t, const void *data, size_t){
dbid = *(int*)data;
});
delete g_pserver->db[idb];
g_pserver->db[idb] = new (MALLOC_LOCAL) redisDb();
g_pserver->db[idb]->initialize(dbid);
}
moduleFireServerEvent(REDISMODULE_EVENT_LOADING, REDISMODULE_SUBEVENT_LOADING_FLASH_START, NULL);
for (int idb = 0; idb < cserver.dbnum; ++idb)
{
g_pserver->db[idb]->storageProviderInitialize();
g_pserver->db[idb]->trackChanges(false);
}
moduleFireServerEvent(REDISMODULE_EVENT_LOADING, REDISMODULE_SUBEVENT_LOADING_ENDED, NULL);
unprotectClient(c);
} else {
/* The default behavior is to save the RDB file before loading
* it back. */
if (save) {
rdbSaveInfo rsi, *rsiptr;
rsiptr = rdbPopulateSaveInfo(&rsi);
if (rdbSave(nullptr, rsiptr) != C_OK) {
addReply(c,shared.err);
return;
}
}
/* The default behavior is to remove the current dataset from
* memory before loading the RDB file, however when MERGE is
* used together with NOFLUSH, we are able to merge two datasets. */
if (flush) emptyDb(-1,EMPTYDB_NO_FLAGS,NULL);
protectClient(c);
int ret = rdbLoadFile(g_pserver->rdb_filename,NULL,flags);
unprotectClient(c);
if (ret != 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(szFromObj(c->argv[1]),"loadaof")) {
if (g_pserver->aof_state != AOF_OFF) flushAppendOnlyFile(1);
emptyDb(-1,EMPTYDB_NO_FLAGS,NULL);
protectClient(c);
int ret = loadAppendOnlyFile(g_pserver->aof_filename);
unprotectClient(c);
if (ret != C_OK) {
addReplyErrorObject(c,shared.err);
return;
}
g_pserver->dirty = 0; /* Prevent AOF / replication */
serverLog(LL_WARNING,"Append Only File loaded by DEBUG LOADAOF");
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"object") && c->argc == 3) {
robj *val;
const char *strenc;
val = c->db->find(c->argv[2]);
if (val == NULL) {
addReplyErrorObject(c,shared.nokeyerr);
return;
}
strenc = strEncoding(val->encoding);
char extra[138] = {0};
if (val->encoding == OBJ_ENCODING_QUICKLIST) {
char *nextra = extra;
int remaining = sizeof(extra);
quicklist *ql = (quicklist*)val->m_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, static_cast<int>(val->getrefcount(std::memory_order_relaxed)),
strenc, rdbSavedObjectLen(val, c->argv[2]),
val->lru, estimateObjectIdleTime(val)/1000, extra);
} else if (!strcasecmp(szFromObj(c->argv[1]),"sdslen") && c->argc == 3) {
auto itr = c->db->find(c->argv[2]);
robj *val = itr.val();
const char *key = itr.key();
if (val == NULL) {
addReplyErrorObject(c,shared.nokeyerr);
return;
}
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((sds)key),
(long long) sdslen(szFromObj(val)),
(long long) sdsavail(szFromObj(val)),
(long long) getStringObjectSdsUsedMemory(val));
}
} else if (!strcasecmp(szFromObj(c->argv[1]),"ziplist") && c->argc == 3) {
robj_roptr o;
if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nokeyerr))
== nullptr) return;
if (o->encoding != OBJ_ENCODING_ZIPLIST) {
addReplyError(c,"Not a ziplist encoded object.");
} else {
ziplistRepr((unsigned char*)ptrFromObj(o));
addReplyStatus(c,"Ziplist structure printed on stdout");
}
} else if (!strcasecmp(szFromObj(c->argv[1]),"populate") &&
c->argc >= 3 && c->argc <= 5) {
long keys, j;
robj *key, *val;
char buf[128];
if (getPositiveLongFromObjectOrReply(c, c->argv[2], &keys, NULL) != C_OK)
return;
c->db->expand(keys);
long valsize = 0;
if ( c->argc == 5 && getPositiveLongFromObjectOrReply(c, c->argv[4], &valsize, NULL) != C_OK )
return;
for (j = 0; j < keys; j++) {
snprintf(buf,sizeof(buf),"%s:%lu",
(c->argc == 3) ? "key" : (char*)ptrFromObj(c->argv[3]), j);
key = createStringObject(buf,strlen(buf));
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(ptrFromObj(val), buf, valsize<=buflen? valsize: buflen);
}
dbAdd(c->db,key,val);
signalModifiedKey(c,c->db,key);
decrRefCount(key);
}
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"digest") && c->argc == 2) {
/* DEBUG DIGEST (form without keys specified) */
unsigned char digest[20];
sds d = sdsempty();
computeDatasetDigest(digest);
for (int i = 0; i < 20; i++) d = sdscatprintf(d, "%02x",digest[i]);
addReplyStatus(c,d);
sdsfree(d);
} else if (!strcasecmp(szFromObj(c->argv[1]),"digest-value") && c->argc >= 2) {
/* DEBUG DIGEST-VALUE key key key ... key. */
addReplyArrayLen(c,c->argc-2);
for (int j = 2; j < c->argc; j++) {
unsigned char digest[20];
memset(digest,0,20); /* Start with a clean result */
/* We don't use lookupKey because a debug command should
* work on logically expired keys */
auto itr = c->db->find(c->argv[j]);
robj* o = (robj*)(itr == NULL ? NULL : itr.val());
if (o) xorObjectDigest(digest,o);
sds d = sdsempty();
for (int i = 0; i < 20; i++) d = sdscatprintf(d, "%02x",digest[i]);
addReplyStatus(c,d);
sdsfree(d);
}
} else if (!strcasecmp(szFromObj(c->argv[1]),"protocol") && c->argc == 3) {
/* DEBUG PROTOCOL [string|integer|double|bignum|null|array|set|map|
* attrib|push|verbatim|true|false] */
const char *name = szFromObj(c->argv[2]);
if (!strcasecmp(name,"string")) {
addReplyBulkCString(c,"Hello World");
} else if (!strcasecmp(name,"integer")) {
addReplyLongLong(c,12345);
} else if (!strcasecmp(name,"double")) {
addReplyDouble(c,3.14159265359);
} else if (!strcasecmp(name,"bignum")) {
addReplyBigNum(c,"1234567999999999999999999999999999999",37);
} else if (!strcasecmp(name,"null")) {
addReplyNull(c);
} else if (!strcasecmp(name,"array")) {
addReplyArrayLen(c,3);
for (int j = 0; j < 3; j++) addReplyLongLong(c,j);
} else if (!strcasecmp(name,"set")) {
addReplySetLen(c,3);
for (int j = 0; j < 3; j++) addReplyLongLong(c,j);
} else if (!strcasecmp(name,"map")) {
addReplyMapLen(c,3);
for (int j = 0; j < 3; j++) {
addReplyLongLong(c,j);
addReplyBool(c, j == 1);
}
} else if (!strcasecmp(name,"attrib")) {
if (c->resp >= 3) {
addReplyAttributeLen(c,1);
addReplyBulkCString(c,"key-popularity");
addReplyArrayLen(c,2);
addReplyBulkCString(c,"key:123");
addReplyLongLong(c,90);
}
/* Attributes are not real replies, so a well formed reply should
* also have a normal reply type after the attribute. */
addReplyBulkCString(c,"Some real reply following the attribute");
} else if (!strcasecmp(name,"push")) {
addReplyPushLen(c,2);
addReplyBulkCString(c,"server-cpu-usage");
addReplyLongLong(c,42);
/* Push replies are not synchronous replies, so we emit also a
* normal reply in order for blocking clients just discarding the
* push reply, to actually consume the reply and continue. */
addReplyBulkCString(c,"Some real reply following the push reply");
} else if (!strcasecmp(name,"true")) {
addReplyBool(c,1);
} else if (!strcasecmp(name,"false")) {
addReplyBool(c,0);
} else if (!strcasecmp(name,"verbatim")) {
addReplyVerbatim(c,"This is a verbatim\nstring",25,"txt");
} else {
addReplyError(c,"Wrong protocol type name. Please use one of the following: string|integer|double|bignum|null|array|set|map|attrib|push|verbatim|true|false");
}
} else if (!strcasecmp(szFromObj(c->argv[1]),"sleep") && c->argc == 3) {
double dtime = strtod(szFromObj(c->argv[2]),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(szFromObj(c->argv[1]),"set-active-expire") &&
c->argc == 3)
{
g_pserver->active_expire_enabled = atoi(szFromObj(c->argv[2]));
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"set-skip-checksum-validation") &&
c->argc == 3)
{
cserver.skip_checksum_validation = atoi(szFromObj(c->argv[2]));
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"aof-flush-sleep") &&
c->argc == 3)
{
g_pserver->aof_flush_sleep = atoi(szFromObj(c->argv[2]));
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"lua-always-replicate-commands") &&
c->argc == 3)
{
g_pserver->lua_always_replicate_commands = atoi(szFromObj(c->argv[2]));
addReply(c,shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"error") && c->argc == 3) {
sds errstr = sdsnewlen("-",1);
errstr = sdscatsds(errstr,szFromObj(c->argv[2]));
errstr = sdsmapchars(errstr,"\n\r"," ",2); /* no newlines in errors. */
errstr = sdscatlen(errstr,"\r\n",2);
addReplySds(c,errstr);
} else if (!strcasecmp(szFromObj(c->argv[1]),"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(szFromObj(c->argv[1]),"htstats") && c->argc == 3) {
long dbid;
sds stats = sdsempty();
char buf[4096];
if (getLongFromObjectOrReply(c, c->argv[2], &dbid, NULL) != C_OK) {
sdsfree(stats);
return;
}
if (dbid < 0 || dbid >= cserver.dbnum) {
sdsfree(stats);
addReplyError(c,"Out of range database");
return;
}
stats = sdscatprintf(stats,"[Dictionary HT]\n");
g_pserver->db[dbid]->getStats(buf,sizeof(buf));
stats = sdscat(stats,buf);
addReplyVerbatim(c,stats,sdslen(stats),"txt");
sdsfree(stats);
} else if (!strcasecmp(szFromObj(c->argv[1]),"htstats-key") && c->argc == 3) {
robj_roptr o;
dict *ht = NULL;
if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nokeyerr))
== nullptr) return;
/* Get the hash table reference from the object, if possible. */
switch (o->encoding) {
case OBJ_ENCODING_SKIPLIST:
{
zset *zs = (zset*)ptrFromObj(o);
ht = zs->dict;
}
break;
case OBJ_ENCODING_HT:
ht = (dict*)ptrFromObj(o);
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);
addReplyVerbatim(c,buf,strlen(buf),"txt");
}
} else if (!strcasecmp(szFromObj(c->argv[1]),"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 if (!strcasecmp(szFromObj(c->argv[1]),"stringmatch-test") && c->argc == 2) {
stringmatchlen_fuzz_test();
addReplyStatus(c,"Apparently Redis did not crash: test passed");
} else if (!strcasecmp(szFromObj(c->argv[1]), "force-master") && c->argc == 3) {
c->flags |= CLIENT_MASTER | CLIENT_MASTER_FORCE_REPLY;
if (!strcasecmp(szFromObj(c->argv[2]), "yes"))
{
redisMaster *mi = (redisMaster*)zcalloc(sizeof(redisMaster), MALLOC_LOCAL);
mi->master = c;
listAddNodeHead(g_pserver->masters, mi);
}
else if (strcasecmp(szFromObj(c->argv[2]), "flagonly")) // if we didn't set flagonly assume its an unset
{
serverAssert(c->flags & CLIENT_MASTER);
if (listLength(g_pserver->masters))
{
redisMaster *mi = (redisMaster*)listNodeValue(listFirst(g_pserver->masters));
serverAssert(mi->master == c);
listDelNode(g_pserver->masters, listFirst(g_pserver->masters));
zfree(mi);
}
c->flags &= ~(CLIENT_MASTER | CLIENT_MASTER_FORCE_REPLY);
}
addReply(c, shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]), "get-temp-file") && c->argc == 2) {
char tmpfile[256];
getTempFileName(tmpfile, g_pserver->rdbThreadVars.tmpfileNum);
addReplyBulkCString(c, tmpfile);
} else if (!strcasecmp(szFromObj(c->argv[1]),"truncate-repl-backlog") && c->argc == 2) {
g_pserver->repl_backlog_idx = 0;
g_pserver->repl_backlog_off = g_pserver->master_repl_offset+1;
g_pserver->repl_backlog_histlen = 0;
if (g_pserver->repl_batch_idxStart >= 0) g_pserver->repl_batch_idxStart = -1;
if (g_pserver->repl_batch_offStart >= 0) g_pserver->repl_batch_offStart = -1;
addReply(c, shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"config-rewrite-force-all") && c->argc == 2)
{
if (rewriteConfig(cserver.configfile, 1) == -1)
addReplyError(c, "CONFIG-REWRITE-FORCE-ALL failed");
else
addReply(c, shared.ok);
} else if (!strcasecmp(szFromObj(c->argv[1]),"config-rewrite-force-all") && c->argc == 2)
{
if (rewriteConfig(cserver.configfile, 1) == -1)
addReplyError(c, "CONFIG-REWRITE-FORCE-ALL failed");
else
addReply(c, shared.ok);
#ifdef USE_JEMALLOC
} else if(!strcasecmp(szFromObj(c->argv[1]),"mallctl") && c->argc >= 3) {
mallctl_int(c, c->argv+2, c->argc-2);
return;
} else if(!strcasecmp(szFromObj(c->argv[1]),"mallctl-str") && c->argc >= 3) {
mallctl_string(c, c->argv+2, c->argc-2);
return;
#endif
} else if(!strcasecmp(szFromObj(c->argv[1]),"flush-storage") && c->argc == 2) {
if (g_pserver->m_pstorageFactory != nullptr) {
for (int i = 0; i < cserver.dbnum; i++) {
g_pserver->db[i]->getStorageCache()->flush();
}
addReply(c,shared.ok);
} else {
addReplyError(c, "Can't flush storage if no storage provider is set");
}
} else if (!strcasecmp(szFromObj(c->argv[1]),"get-storage-usage") && c->argc == 2) {
if (g_pserver->m_pstorageFactory != nullptr) {
addReplyLongLong(c, g_pserver->m_pstorageFactory->totalDiskspaceUsed());
} else {
addReplyLongLong(c, 0);
}
} else {
addReplySubcommandSyntaxError(c);
return;
}
}