mirror of
https://codeberg.org/redict/redict.git
synced 2025-01-22 16:18:28 -05:00
all the stack trace related functions are now in debug.c. Now Redis dumps registers and stack content on crash. Currently osx supported, adding Linux right now.
This commit is contained in:
antirez
parent
f7ccc4830b
commit
d4d208595c
218
src/debug.c
218
src/debug.c
@ -2,6 +2,12 @@
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#include "sha1.h" /* SHA1 is used for DEBUG DIGEST */
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#include <arpa/inet.h>
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#include <signal.h>
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#ifdef HAVE_BACKTRACE
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#include <execinfo.h>
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#include <ucontext.h>
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#endif /* HAVE_BACKTRACE */
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/* ================================= Debugging ============================== */
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@ -297,6 +303,8 @@ void debugCommand(redisClient *c) {
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}
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}
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/* =========================== Crash handling ============================== */
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void _redisAssert(char *estr, char *file, int line) {
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bugReportStart();
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redisLog(REDIS_WARNING,"=== ASSERTION FAILED ===");
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@ -380,3 +388,213 @@ void _redisPanic(char *msg, char *file, int line) {
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*((char*)-1) = 'x';
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#endif
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}
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#ifdef HAVE_BACKTRACE
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static void *getMcontextEip(ucontext_t *uc) {
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#if defined(__FreeBSD__)
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return (void*) uc->uc_mcontext.mc_eip;
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#elif defined(__dietlibc__)
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return (void*) uc->uc_mcontext.eip;
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#elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
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#if __x86_64__
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return (void*) uc->uc_mcontext->__ss.__rip;
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#elif __i386__
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return (void*) uc->uc_mcontext->__ss.__eip;
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#else
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return (void*) uc->uc_mcontext->__ss.__srr0;
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#endif
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#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)
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#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
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return (void*) uc->uc_mcontext->__ss.__rip;
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#else
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return (void*) uc->uc_mcontext->__ss.__eip;
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#endif
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#elif defined(__i386__)
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return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */
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#elif defined(__X86_64__) || defined(__x86_64__)
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return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */
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#elif defined(__ia64__) /* Linux IA64 */
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return (void*) uc->uc_mcontext.sc_ip;
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#else
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return NULL;
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#endif
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}
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void bugReportStart(void) {
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if (server.bug_report_start == 0) {
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redisLog(REDIS_WARNING,
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"\n\n=== REDIS BUG REPORT START: Cut & paste starting from here ===");
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server.bug_report_start = 1;
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}
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}
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void logStackContent(void **sp) {
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int i;
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for (i = 15; i >= 0; i--) {
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redisLog(REDIS_WARNING, "(%p) -> %p", sp+i, sp[i]);
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}
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}
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void logRegisters(ucontext_t *uc) {
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redisLog(REDIS_WARNING, "--- REGISTERS");
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#if defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)
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#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
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redisLog(REDIS_WARNING,
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"\n"
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"RAX:%p RBX:%p RCX:%p RDX:%p\n"
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"RDI:%p RSI:%p RBP:%p RSP:%p\n"
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"R8:%p R9:%p R10:%p R11:%p\n"
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"R12:%p R13:%p R14:%p R15:%p\n"
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"RIP:%p EFL:%p CS:%p FS:%p GS:%p",
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uc->uc_mcontext->__ss.__rax,
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uc->uc_mcontext->__ss.__rbx,
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uc->uc_mcontext->__ss.__rcx,
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uc->uc_mcontext->__ss.__rdx,
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uc->uc_mcontext->__ss.__rdi,
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uc->uc_mcontext->__ss.__rsi,
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uc->uc_mcontext->__ss.__rbp,
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uc->uc_mcontext->__ss.__rsp,
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uc->uc_mcontext->__ss.__r8,
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uc->uc_mcontext->__ss.__r9,
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uc->uc_mcontext->__ss.__r10,
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uc->uc_mcontext->__ss.__r11,
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uc->uc_mcontext->__ss.__r12,
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uc->uc_mcontext->__ss.__r13,
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uc->uc_mcontext->__ss.__r14,
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uc->uc_mcontext->__ss.__r15,
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uc->uc_mcontext->__ss.__rip,
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uc->uc_mcontext->__ss.__rflags,
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uc->uc_mcontext->__ss.__cs,
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uc->uc_mcontext->__ss.__fs,
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uc->uc_mcontext->__ss.__gs
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);
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logStackContent((void**)uc->uc_mcontext->__ss.__rsp);
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#else
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redisLog(REDIS_WARNING,
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"\n"
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"EAX:%p EBX:%p ECX:%p EDX:%p\n"
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"EDI:%p ESI:%p EBP:%p ESP:%p\n"
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"SS:%p EFL:%p EIP:%p CS:%p\n"
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"DS:%p ES:%p FS:%p GS:%p",
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uc->uc_mcontext->__ss.__eax,
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uc->uc_mcontext->__ss.__ebx,
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uc->uc_mcontext->__ss.__ecx,
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uc->uc_mcontext->__ss.__edx,
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uc->uc_mcontext->__ss.__edi,
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uc->uc_mcontext->__ss.__esi,
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uc->uc_mcontext->__ss.__ebp,
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uc->uc_mcontext->__ss.__esp,
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uc->uc_mcontext->__ss.__ss,
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uc->uc_mcontext->__ss.__eflags,
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uc->uc_mcontext->__ss.__eip,
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uc->uc_mcontext->__ss.__cs,
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uc->uc_mcontext->__ss.__ds,
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uc->uc_mcontext->__ss.__es,
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uc->uc_mcontext->__ss.__fs,
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uc->uc_mcontext->__ss.__gs
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);
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logStackContent((void**)uc->uc_mcontext->__ss.__esp);
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#endif
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#elif defined(__i386__)
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return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */
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#elif defined(__X86_64__) || defined(__x86_64__)
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return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */
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#else
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redisLog(REDIS_WARNING,
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" Dumping of registers not supported for this OS/arch");
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#endif
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}
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void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
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void *trace[100];
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char **messages = NULL;
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int i, trace_size = 0;
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ucontext_t *uc = (ucontext_t*) secret;
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sds infostring, clients;
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struct sigaction act;
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REDIS_NOTUSED(info);
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bugReportStart();
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redisLog(REDIS_WARNING,
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" Redis %s crashed by signal: %d", REDIS_VERSION, sig);
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redisLog(REDIS_WARNING,
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" Failed assertion: %s (%s:%d)", server.assert_failed,
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server.assert_file, server.assert_line);
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/* Generate the stack trace */
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trace_size = backtrace(trace, 100);
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/* overwrite sigaction with caller's address */
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if (getMcontextEip(uc) != NULL) {
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trace[1] = getMcontextEip(uc);
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}
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messages = backtrace_symbols(trace, trace_size);
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redisLog(REDIS_WARNING, "--- STACK TRACE");
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for (i=1; i<trace_size; ++i)
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redisLog(REDIS_WARNING,"%s", messages[i]);
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/* Log INFO and CLIENT LIST */
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redisLog(REDIS_WARNING, "--- INFO OUTPUT");
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infostring = genRedisInfoString("all");
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redisLogRaw(REDIS_WARNING, infostring);
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redisLog(REDIS_WARNING, "--- CLIENT LIST OUTPUT");
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clients = getAllClientsInfoString();
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redisLogRaw(REDIS_WARNING, clients);
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/* Don't sdsfree() strings to avoid a crash. Memory may be corrupted. */
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/* Log CURRENT CLIENT info */
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if (server.current_client) {
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redisClient *cc = server.current_client;
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sds client;
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int j;
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redisLog(REDIS_WARNING, "--- CURRENT CLIENT INFO");
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client = getClientInfoString(cc);
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redisLog(REDIS_WARNING,"client: %s", client);
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/* Missing sdsfree(client) to avoid crash if memory is corrupted. */
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for (j = 0; j < cc->argc; j++) {
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robj *decoded;
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decoded = getDecodedObject(cc->argv[j]);
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redisLog(REDIS_WARNING,"argv[%d]: '%s'", j, (char*)decoded->ptr);
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decrRefCount(decoded);
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}
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/* Check if the first argument, usually a key, is found inside the
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* selected DB, and if so print info about the associated object. */
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if (cc->argc >= 1) {
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robj *val, *key;
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dictEntry *de;
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key = getDecodedObject(cc->argv[1]);
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de = dictFind(cc->db->dict, key->ptr);
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if (de) {
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val = dictGetVal(de);
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redisLog(REDIS_WARNING,"key '%s' found in DB containing the following object:", key->ptr);
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redisLogObjectDebugInfo(val);
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}
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decrRefCount(key);
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}
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}
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/* Log dump of processor registers */
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logRegisters(uc);
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redisLog(REDIS_WARNING,
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"\n=== REDIS BUG REPORT END. Make sure to include from START to END. ===\n\n"
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" Please report the crash opening an issue on github:\n\n"
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" http://github.com/antirez/redis/issues\n\n"
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);
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/* free(messages); Don't call free() with possibly corrupted memory. */
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if (server.daemonize) unlink(server.pidfile);
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/* Make sure we exit with the right signal at the end. So for instance
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* the core will be dumped if enabled. */
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sigemptyset (&act.sa_mask);
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/* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction
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* is used. Otherwise, sa_handler is used */
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act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
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act.sa_handler = SIG_DFL;
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sigaction (sig, &act, NULL);
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kill(getpid(),sig);
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}
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#endif /* HAVE_BACKTRACE */
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135
src/redis.c
135
src/redis.c
@ -31,11 +31,6 @@
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#include "slowlog.h"
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#include "bio.h"
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#ifdef HAVE_BACKTRACE
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#include <execinfo.h>
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#include <ucontext.h>
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#endif /* HAVE_BACKTRACE */
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#include <time.h>
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#include <signal.h>
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#include <sys/wait.h>
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@ -1933,136 +1928,6 @@ void redisAsciiArt(void) {
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zfree(buf);
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}
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#ifdef HAVE_BACKTRACE
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static void *getMcontextEip(ucontext_t *uc) {
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#if defined(__FreeBSD__)
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return (void*) uc->uc_mcontext.mc_eip;
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#elif defined(__dietlibc__)
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return (void*) uc->uc_mcontext.eip;
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#elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
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#if __x86_64__
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return (void*) uc->uc_mcontext->__ss.__rip;
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#elif __i386__
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return (void*) uc->uc_mcontext->__ss.__eip;
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#else
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return (void*) uc->uc_mcontext->__ss.__srr0;
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#endif
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#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)
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#if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
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return (void*) uc->uc_mcontext->__ss.__rip;
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#else
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return (void*) uc->uc_mcontext->__ss.__eip;
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#endif
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#elif defined(__i386__)
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return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */
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#elif defined(__X86_64__) || defined(__x86_64__)
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return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */
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#elif defined(__ia64__) /* Linux IA64 */
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return (void*) uc->uc_mcontext.sc_ip;
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#else
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return NULL;
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#endif
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}
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void bugReportStart(void) {
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if (server.bug_report_start == 0) {
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redisLog(REDIS_WARNING,
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"=== REDIS BUG REPORT START: Cut & paste starting from here ===");
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server.bug_report_start = 1;
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}
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}
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static void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
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void *trace[100];
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char **messages = NULL;
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int i, trace_size = 0;
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ucontext_t *uc = (ucontext_t*) secret;
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sds infostring, clients;
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struct sigaction act;
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REDIS_NOTUSED(info);
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bugReportStart();
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redisLog(REDIS_WARNING,
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" Redis %s crashed by signal: %d", REDIS_VERSION, sig);
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redisLog(REDIS_WARNING,
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" Failed assertion: %s (%s:%d)", server.assert_failed,
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server.assert_file, server.assert_line);
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/* Generate the stack trace */
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trace_size = backtrace(trace, 100);
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/* overwrite sigaction with caller's address */
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if (getMcontextEip(uc) != NULL) {
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trace[1] = getMcontextEip(uc);
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}
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messages = backtrace_symbols(trace, trace_size);
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redisLog(REDIS_WARNING, "--- STACK TRACE");
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for (i=1; i<trace_size; ++i)
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redisLog(REDIS_WARNING,"%s", messages[i]);
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/* Log INFO and CLIENT LIST */
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redisLog(REDIS_WARNING, "--- INFO OUTPUT");
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infostring = genRedisInfoString("all");
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redisLogRaw(REDIS_WARNING, infostring);
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redisLog(REDIS_WARNING, "--- CLIENT LIST OUTPUT");
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clients = getAllClientsInfoString();
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redisLogRaw(REDIS_WARNING, clients);
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/* Don't sdsfree() strings to avoid a crash. Memory may be corrupted. */
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/* Log CURRENT CLIENT info */
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if (server.current_client) {
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redisClient *cc = server.current_client;
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sds client;
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int j;
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redisLog(REDIS_WARNING, "--- CURRENT CLIENT INFO");
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client = getClientInfoString(cc);
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redisLog(REDIS_WARNING,"client: %s", client);
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/* Missing sdsfree(client) to avoid crash if memory is corrupted. */
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for (j = 0; j < cc->argc; j++) {
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robj *decoded;
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decoded = getDecodedObject(cc->argv[j]);
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redisLog(REDIS_WARNING,"argv[%d]: '%s'", j, (char*)decoded->ptr);
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decrRefCount(decoded);
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}
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/* Check if the first argument, usually a key, is found inside the
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* selected DB, and if so print info about the associated object. */
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if (cc->argc >= 1) {
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robj *val, *key;
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dictEntry *de;
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key = getDecodedObject(cc->argv[1]);
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de = dictFind(cc->db->dict, key->ptr);
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if (de) {
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val = dictGetVal(de);
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redisLog(REDIS_WARNING,"key '%s' found in DB containing the following object:", key->ptr);
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redisLogObjectDebugInfo(val);
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}
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decrRefCount(key);
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}
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}
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redisLog(REDIS_WARNING,
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"=== REDIS BUG REPORT END. Make sure to include from START to END. ===\n\n"
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" Please report the crash opening an issue on github:\n\n"
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" http://github.com/antirez/redis/issues\n\n"
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);
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/* free(messages); Don't call free() with possibly corrupted memory. */
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if (server.daemonize) unlink(server.pidfile);
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/* Make sure we exit with the right signal at the end. So for instance
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* the core will be dumped if enabled. */
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sigemptyset (&act.sa_mask);
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/* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction
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* is used. Otherwise, sa_handler is used */
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act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
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act.sa_handler = SIG_DFL;
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sigaction (sig, &act, NULL);
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kill(getpid(),sig);
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}
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#endif /* HAVE_BACKTRACE */
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static void sigtermHandler(int sig) {
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REDIS_NOTUSED(sig);
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@ -1161,5 +1161,6 @@ void _redisAssert(char *estr, char *file, int line);
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void _redisPanic(char *msg, char *file, int line);
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void bugReportStart(void);
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void redisLogObjectDebugInfo(robj *o);
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void sigsegvHandler(int sig, siginfo_t *info, void *secret);
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sds genRedisInfoString(char *section);
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#endif
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