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Subject[PATCH 18/25] perf script: Add a setting for maximum stack depth
Date
Add a setting for maximum stack depth in preparation for
allowing for synthesized callchains.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/builtin-script.c | 6 ++++--
tools/perf/util/session.c | 2 +-
2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 092843968791..a65b498df097 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -33,6 +33,8 @@ static bool nanosecs;
static const char *cpu_list;
static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);

+static unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;
+
enum perf_output_field {
PERF_OUTPUT_COMM = 1U << 0,
PERF_OUTPUT_TID = 1U << 1,
@@ -475,7 +477,7 @@ static void print_sample_bts(union perf_event *event,
}
}
perf_evsel__print_ip(evsel, sample, al, print_opts,
- PERF_MAX_STACK_DEPTH);
+ scripting_max_stack);
}

/* print branch_to information */
@@ -552,7 +554,7 @@ static void process_event(union perf_event *event, struct perf_sample *sample,

perf_evsel__print_ip(evsel, sample, al,
output[attr->type].print_ip_opts,
- PERF_MAX_STACK_DEPTH);
+ scripting_max_stack);
}

if (PRINT_FIELD(IREGS))
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 15c84cad213a..84a02eae4394 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1800,7 +1800,7 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,

if (thread__resolve_callchain(al->thread, evsel,
sample, NULL, NULL,
- PERF_MAX_STACK_DEPTH) != 0) {
+ stack_depth) != 0) {
if (verbose)
error("Failed to resolve callchain. Skipping\n");
return;
--
1.9.1


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