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| author | Ingo Molnar <mingo@elte.hu> | 2009-08-18 13:52:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-18 14:00:52 +0200 |
| commit | 15f3fa4e7f608c5ce19187b3b4a953222fdfa751 (patch) | |
| tree | 97ef1f8e7beb151759a664ddda1a4d1c5cfdc84d | |
| parent | f738eb1b63edf664da1b4ac76895d988749b2f07 (diff) | |
| download | op-kernel-dev-15f3fa4e7f608c5ce19187b3b4a953222fdfa751.zip op-kernel-dev-15f3fa4e7f608c5ce19187b3b4a953222fdfa751.tar.gz | |
perf annotate: Fix segmentation fault
Linus reported this perf annotate segfault:
[torvalds@nehalem git]$ perf annotate unmap_vmas
Segmentation fault
#0 map__clone (self=<value optimized out>) at builtin-annotate.c:236
#1 thread__fork (self=<value optimized out>) at builtin-annotate.c:372
The bug here was that builtin-annotate.c was a copy of
builtin-report.c and a threading related fix to builtin-report.c
didnt get propagated to builtin-annotate.c ...
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | tools/perf/builtin-annotate.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index 1dba568..343e7b1 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -980,6 +980,13 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head) (void *)(long)(event->header.size), event->fork.pid, event->fork.ppid); + /* + * A thread clone will have the same PID for both + * parent and child. + */ + if (thread == parent) + return 0; + if (!thread || !parent || thread__fork(thread, parent)) { dprintf("problem processing PERF_EVENT_FORK, skipping event.\n"); return -1; |
