[PATCH 11/11] perf intel-pt: Add callchain to synthesized PEBS sample

Adrian Hunter
2019-06-10T07:29:44Z

Like other synthesized events, if there is also an Intel PT branch trace,
then a call stack can also be synthesized. Add that.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/intel-pt.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 0b7beb98a028..ea03bdaf8009 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -1626,6 +1626,14 @@ static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq)
sample.time = tsc_to_perf_time(timestamp, &pt->tc);
}

+ if (sample_type & PERF_SAMPLE_CALLCHAIN &&
+ pt->synth_opts.callchain) {
+ thread_stack__sample(ptq->thread, ptq->cpu, ptq->chain,
+ pt->synth_opts.callchain_sz, sample.ip,
+ pt->kernel_start);
+ sample.callchain = ptq->chain;
+ }
+
if (sample_type & PERF_SAMPLE_REGS_INTR &&
items->mask[INTEL_PT_GP_REGS_POS]) {
u64 regs[sizeof(sample.intr_regs.mask)];
--
2.17.1