linux-kernel - [tip:perf/core] perf callchain: Allow for max_stack greater than PERF_MAX_STACK

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Message-ID: <tip-0edd453368c6b9cdb756bde2b6675bb0d5d0eb0a@git.kernel.org>
Date:	Sat, 3 Oct 2015 00:49:59 -0700
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, linux-kernel@...r.kernel.org, jolsa@...hat.com,
	adrian.hunter@...el.com, mingo@...nel.org, hpa@...or.com,
	acme@...hat.com
Subject: [tip:perf/core] perf callchain:
  Allow for max_stack greater than PERF_MAX_STACK_DEPTH

Commit-ID:  0edd453368c6b9cdb756bde2b6675bb0d5d0eb0a
Gitweb:     http://git.kernel.org/tip/0edd453368c6b9cdb756bde2b6675bb0d5d0eb0a
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Fri, 25 Sep 2015 16:15:48 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 1 Oct 2015 09:56:06 -0300

perf callchain: Allow for max_stack greater than PERF_MAX_STACK_DEPTH

Adjust the validation to allow for max_stack greater than
PERF_MAX_STACK_DEPTH.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-18-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/machine.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 76fe167..5ef90be 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1831,7 +1831,7 @@ static int thread__resolve_callchain_sample(struct thread *thread,
 	}
 
 check_calls:
-	if (chain->nr > PERF_MAX_STACK_DEPTH) {
+	if (chain->nr > PERF_MAX_STACK_DEPTH && (int)chain->nr > max_stack) {
 		pr_warning("corrupted callchain. skipping...\n");
 		return 0;
 	}
--
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