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Subject[PATCH 16/25] perf hists: Allow for max_stack greater than PERF_MAX_STACK_DEPTH
Date
Use the max_stack value instead of PERF_MAX_STACK_DEPTH so that
arbitrary-sized callchains can be supported.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/hist.c | 6 ++++--
tools/perf/util/hist.h | 1 +
2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index b3567a25f0c4..0cad9e07c5b4 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -695,7 +695,7 @@ iter_finish_normal_entry(struct hist_entry_iter *iter,
}

static int
-iter_prepare_cumulative_entry(struct hist_entry_iter *iter __maybe_unused,
+iter_prepare_cumulative_entry(struct hist_entry_iter *iter,
struct addr_location *al __maybe_unused)
{
struct hist_entry **he_cache;
@@ -707,7 +707,7 @@ iter_prepare_cumulative_entry(struct hist_entry_iter *iter __maybe_unused,
* cumulated only one time to prevent entries more than 100%
* overhead.
*/
- he_cache = malloc(sizeof(*he_cache) * (PERF_MAX_STACK_DEPTH + 1));
+ he_cache = malloc(sizeof(*he_cache) * (iter->max_stack + 1));
if (he_cache == NULL)
return -ENOMEM;

@@ -868,6 +868,8 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
if (err)
return err;

+ iter->max_stack = max_stack_depth;
+
err = iter->ops->prepare_entry(iter, al);
if (err)
goto out;
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 4d6aa1dbdaee..8c20a8f6b214 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -90,6 +90,7 @@ struct hist_entry_iter {
int curr;

bool hide_unresolved;
+ int max_stack;

struct perf_evsel *evsel;
struct perf_sample *sample;
--
1.9.1


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