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crash log - add hex dump of function code

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oranagra 2016-07-04 23:28:32 +03:00 committed by antirez
parent 0d179d17ba
commit 24811fcb1b
1 changed files with 22 additions and 0 deletions
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22
src/debug.c
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@ -39,6 +39,9 @@
#include <ucontext.h>
#include <fcntl.h>
#include "bio.h"
#include <unistd.h>
#define _GNU_SOURCE
#include <dlfcn.h>
#endif /* HAVE_BACKTRACE */
#ifdef __CYGWIN__
@ -669,6 +672,8 @@ static void *getMcontextEip(ucontext_t *uc) {
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;
#endif
#else
return NULL;
@ -1036,6 +1041,23 @@ void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
/* free(messages); Don't call free() with possibly corrupted memory. */
if (server.daemonize && server.supervised == 0) unlink(server.pidfile);
if (eip != NULL) {
Dl_info info;
if (dladdr(eip, &info) != 0)
{
serverLog(LL_WARNING,
"symbol: %s (base %p), in module: %s (base: %p)",
info.dli_sname, info.dli_saddr, info.dli_fname, info.dli_fbase);
size_t len = (long)eip - (long)info.dli_saddr;
long sz = sysconf(_SC_PAGESIZE);
if (len < 1<<13) { /* we don't have functions over 8k (verified) */
long end = ((long)eip + sz) & ~(sz-1); /* round up to page boundary */
len = end - (long)info.dli_saddr;
serverLogHexDump(LL_WARNING, "dump of function", info.dli_saddr ,len);
}
}
}
/* Make sure we exit with the right signal at the end. So for instance
* the core will be dumped if enabled. */
sigemptyset (&act.sa_mask);