linux-kernel - [tip:perf/core] perf script/python: Print array argument as string

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Message-ID: <tip-e646fe730a324098a718f1c9b2f349efb99d5457@git.kernel.org>
Date:	Thu, 12 Jun 2014 05:01:54 -0700
From:	tip-bot for Namhyung Kim <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	jolsa@...nel.org, tzanussi@...il.com, namhyung@...nel.org,
	tglx@...utronix.de, bigeasy@...utronix.de
Subject: [tip:perf/core] perf script/python:
  Print array argument as string

Commit-ID:  e646fe730a324098a718f1c9b2f349efb99d5457
Gitweb:     http://git.kernel.org/tip/e646fe730a324098a718f1c9b2f349efb99d5457
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Thu, 29 May 2014 13:44:55 +0900
Committer:  Jiri Olsa <jolsa@...nel.org>
CommitDate: Mon, 9 Jun 2014 12:21:03 +0200

perf script/python: Print array argument as string

With the Sebastian's change of handling num array argument (of raw
syscall enter), the script still failed to work like this:

  $ perf record -e raw_syscalls:* sleep 1
  $ perf script -g python
  $ perf script -s perf-script.py
  ...
  Traceback (most recent call last):
    File "perf-script.py", line 42, in raw_syscalls__sys_enter
      (id, args),
  TypeError: %u format: a number is required, not list
  Fatal Python error: problem in Python trace event handler
  Aborted (core dumped)

This is because the generated script tries to print the array arg as
unsigned integer (%u).  Since the python seems to convert arguments to
strings by default, just using %s solved the problem for me.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: Tom Zanussi <tzanussi@...il.com>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Link: http://lkml.kernel.org/r/1401338695-18837-1-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/scripting-engines/trace-event-python.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index c3de097..1c41932 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -623,6 +623,7 @@ static int python_generate_script(struct pevent *pevent, const char *outfile)
 			fprintf(ofp, "%s=", f->name);
 			if (f->flags & FIELD_IS_STRING ||
 			    f->flags & FIELD_IS_FLAG ||
+			    f->flags & FIELD_IS_ARRAY ||
 			    f->flags & FIELD_IS_SYMBOLIC)
 				fprintf(ofp, "%%s");
 			else if (f->flags & FIELD_IS_SIGNED)
--
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