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

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Message-ID: <tip-44cbe7295c3808977159f500a5bcdebf12a7db5f@git.kernel.org>
Date:	Tue, 29 Sep 2015 01:47:16 -0700
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com,
	adrian.hunter@...el.com, jolsa@...hat.com, acme@...hat.com,
	tglx@...utronix.de, mingo@...nel.org
Subject: [tip:perf/core] perf scripting python:
  Allow for max_stack greater than PERF_MAX_STACK_DEPTH

Commit-ID:  44cbe7295c3808977159f500a5bcdebf12a7db5f
Gitweb:     http://git.kernel.org/tip/44cbe7295c3808977159f500a5bcdebf12a7db5f
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Fri, 25 Sep 2015 16:15:50 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 28 Sep 2015 17:09:12 -0300

perf scripting python: Allow for max_stack greater than PERF_MAX_STACK_DEPTH

Use the scripting_max_stack value to allow for values 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/1443186956-18718-20-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-script.c                            | 2 +-
 tools/perf/util/scripting-engines/trace-event-python.c | 2 +-
 tools/perf/util/trace-event.h                          | 2 ++
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index a65b498..5c3c02d 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -33,7 +33,7 @@ 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;
+unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;
 
 enum perf_output_field {
 	PERF_OUTPUT_COMM            = 1U << 0,
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index aa9e125..a8e825f 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -319,7 +319,7 @@ static PyObject *python_process_callchain(struct perf_sample *sample,
 
 	if (thread__resolve_callchain(al->thread, evsel,
 				      sample, NULL, NULL,
-				      PERF_MAX_STACK_DEPTH) != 0) {
+				      scripting_max_stack) != 0) {
 		pr_err("Failed to resolve callchain. Skipping\n");
 		goto exit;
 	}
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index da6cc4c..b85ee55 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -78,6 +78,8 @@ struct scripting_ops {
 	int (*generate_script) (struct pevent *pevent, const char *outfile);
 };
 
+extern unsigned int scripting_max_stack;
+
 int script_spec_register(const char *spec, struct scripting_ops *ops);
 
 void setup_perl_scripting(void);
--
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