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Subject[PATCH V6 06/12] perf tools: remove unnecessary callchain validation
Date
Now that the sample parsing correctly checks data sizes
there is no reason for it to be done again for callchains.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/callchain.c | 8 --------
tools/perf/util/callchain.h | 5 -----
tools/perf/util/session.c | 20 --------------------
3 files changed, 33 deletions(-)

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 42b6a63..024162a 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -20,14 +20,6 @@

__thread struct callchain_cursor callchain_cursor;

-bool ip_callchain__valid(struct ip_callchain *chain,
- const union perf_event *event)
-{
- unsigned int chain_size = event->header.size;
- chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
- return chain->nr * sizeof(u64) <= chain_size;
-}
-
#define chain_for_each_child(child, parent) \
list_for_each_entry(child, &parent->children, siblings)

diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 3ee9f67..988c1aa 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -103,11 +103,6 @@ int callchain_append(struct callchain_root *root,
int callchain_merge(struct callchain_cursor *cursor,
struct callchain_root *dst, struct callchain_root *src);

-struct ip_callchain;
-union perf_event;
-
-bool ip_callchain__valid(struct ip_callchain *chain,
- const union perf_event *event);
/*
* Initialize a cursor before adding entries inside, but keep
* the previously allocated entries as a cache.
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 708c72b..1b07d7a 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -889,22 +889,6 @@ static int perf_session_deliver_event(struct perf_session *session,
}
}

-static int perf_session__preprocess_sample(struct perf_session *session,
- union perf_event *event, struct perf_sample *sample)
-{
- if (event->header.type != PERF_RECORD_SAMPLE ||
- !sample->callchain)
- return 0;
-
- if (!ip_callchain__valid(sample->callchain, event)) {
- pr_debug("call-chain problem with event, skipping it.\n");
- ++session->stats.nr_invalid_chains;
- session->stats.total_invalid_chains += sample->period;
- return -EINVAL;
- }
- return 0;
-}
-
static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
struct perf_tool *tool, u64 file_offset)
{
@@ -967,10 +951,6 @@ static int perf_session__process_event(struct perf_session *session,
if (ret)
return ret;

- /* Preprocess sample records - precheck callchains */
- if (perf_session__preprocess_sample(session, event, &sample))
- return 0;
-
if (tool->ordered_samples) {
ret = perf_session_queue_event(session, event, &sample,
file_offset);
--
1.7.11.7


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