Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH 01/12] perf, tools, pt: Clear instruction for ptwrite samples | Date | Mon, 27 Nov 2017 16:23:10 -0800 |
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From: Andi Kleen <ak@linux.intel.com>
When a PTWRITE sample is synthesized the PT decoder already ran ahead and sample->insn contains the next branch instruction, not the PTWRITE.
Clear it for PTWRITE samples to avoid confusion.
Signed-off-by: Andi Kleen <ak@linux.intel.com> --- tools/perf/util/intel-pt.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index 23f9ba676df0..485c8040484e 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -1262,6 +1262,12 @@ static void intel_pt_prep_p_sample(struct intel_pt *pt, */ if (!sample->ip) sample->flags = 0; + + /* + * Don't have valid instructions because decoder already ran ahead. + */ + sample->insn_len = 0; + memset(sample->insn, 0, INTEL_PT_INSN_BUF_SZ); } static int intel_pt_synth_ptwrite_sample(struct intel_pt_queue *ptq) -- 2.13.6
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