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Subject[PATCH 11/25] perf report: Skip events with null branch stacks
Date
A non-synthesized event might not have a branch stack if branch
stacks have been synthesized (using itrace options).

An example of that is when Intel PT records sched_switch events
for decoding purposes. Those sched_switch events do not have
branch stacks even though the Intel PT decoder may be synthesizing
other events that do due to the itrace options.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/builtin-report.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 92f7c5a75208..e94e5c7155af 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -163,14 +163,21 @@ static int process_sample_event(struct perf_tool *tool,
if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap))
goto out_put;

- if (sort__mode == SORT_MODE__BRANCH)
+ if (sort__mode == SORT_MODE__BRANCH) {
+ /*
+ * A non-synthesized event might not have a branch stack if
+ * branch stacks have been synthesized (using itrace options).
+ */
+ if (!sample->branch_stack)
+ goto out_put;
iter.ops = &hist_iter_branch;
- else if (rep->mem_mode)
+ } else if (rep->mem_mode) {
iter.ops = &hist_iter_mem;
- else if (symbol_conf.cumulate_callchain)
+ } else if (symbol_conf.cumulate_callchain) {
iter.ops = &hist_iter_cumulative;
- else
+ } else {
iter.ops = &hist_iter_normal;
+ }

if (al.map != NULL)
al.map->dso->hit = 1;
--
1.9.1


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