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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-07-05 07:39:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-07-05 10:30:21 +0200 |
| commit | 91b4eaea93f5be95f4477554399680a53aff2343 (patch) | |
| tree | 2a78d12b0798f5ed6e726ccc11f476807bf85088 /tools/perf | |
| parent | a79f0da80a508448434476b77f9d3d1a469eab67 (diff) | |
| download | lwn-91b4eaea93f5be95f4477554399680a53aff2343.tar.gz lwn-91b4eaea93f5be95f4477554399680a53aff2343.zip | |
perf report: Warn on callchain output request from non-callchain file
perf report segfaults while trying to handle callchains from a non
callchain data file.
Instead of a segfault, print a useful message to the user.
Reported-by: Jens Axboe <jens.axboe@oracle.com>
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1246772361-9960-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-report.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index fa937f5c3c39..9f9575afab08 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -1684,9 +1684,19 @@ static int __cmd_report(void) sample_type = perf_header__sample_type(); - if (sort__has_parent && !(sample_type & PERF_SAMPLE_CALLCHAIN)) { - fprintf(stderr, "selected --sort parent, but no callchain data\n"); - exit(-1); + if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) { + if (sort__has_parent) { + fprintf(stderr, "selected --sort parent, but no" + " callchain data. Did you call" + " perf record without -g?\n"); + exit(-1); + } + if (callchain) { + fprintf(stderr, "selected -c but no callchain data." + " Did you call perf record without" + " -g?\n"); + exit(-1); + } } if (load_kernel() < 0) { |