From 4d08cb80ef5199258c01a3444fd29d94a36a0343 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 24 Feb 2015 15:35:55 -0300 Subject: [PATCH] perf trace: Dump stack on segfaults [root@ssdandy ~]# perf trace --filter-pids 16348 0.000 ( 0.000 ms): tuned/1027 ... [continued]: select()) = 0 Timeout 793.770 ( 0.000 ms): lsmd/895 ... [continued]: select()) = 0 Timeout 793.775 (793.724 ms): tuned/1027 select(tvp: 0x7f7655556e50) ... perf: Segmentation fault Obtained 15 stack frames. perf(dump_stack+0x2e) [0x4ed330] perf(sighandler_dump_stack+0x2e) [0x4ed40f] /lib64/libc.so.6(+0x35640) [0x7fa2d5b69640] perf() [0x4c2d35] perf(machine__findnew_thread+0x39) [0x4c2ed6] perf() [0x454a4d] perf() [0x455f87] perf() [0x456556] perf(cmd_trace+0xa7e) [0x4580af] perf() [0x4867bd] perf() [0x486a1c] perf() [0x486b68] perf(main+0x23b) [0x486ec9] /lib64/libc.so.6(__libc_start_main+0xf5) [0x7fa2d5b55af5] perf() [0x41bd91] [ root@ssdandy ~]# Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-v38cbxcnm2yf5qn9u4y4n9ab@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index fbdfb338bc38..5cd8497445fe 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -2660,6 +2660,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) int err; char bf[BUFSIZ]; + signal(SIGSEGV, sighandler_dump_stack); + signal(SIGFPE, sighandler_dump_stack); + trace.evlist = perf_evlist__new(); if (trace.evlist == NULL) return -ENOMEM; -- 2.20.1