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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2011-05-21 21:33:04 +0400 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2011-05-22 05:38:36 +0400 |
| commit | a285412479b6d5af3e48273a92ec2f1987df8cd1 (patch) | |
| tree | 29f68684cebb26b86c3dd0b0f0fc4e5d6553c989 /tools/perf/util/event.c | |
| parent | 74429964d8e29c0107fa6e9cdf35b8f33f57405d (diff) | |
| download | linux-a285412479b6d5af3e48273a92ec2f1987df8cd1.tar.xz | |
perf tools: Pre-check sample size before parsing
Check that the total size of the sample fields having a fixed
size do not exceed the one of the whole event. This robustifies
the sample parsing.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Diffstat (limited to 'tools/perf/util/event.c')
| -rw-r--r-- | tools/perf/util/event.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 1023f67633a4..17c1c3c875c3 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -35,6 +35,22 @@ const char *perf_event__name(unsigned int id) return perf_event__names[id]; } +int perf_sample_size(u64 sample_type) +{ + u64 mask = sample_type & PERF_SAMPLE_MASK; + int size = 0; + int i; + + for (i = 0; i < 64; i++) { + if ((mask << i) & 1) + size++; + } + + size *= sizeof(u64); + + return size; +} + static struct perf_sample synth_sample = { .pid = -1, .tid = -1, |