linux-kernel - [GIT PULL] perf fixlet for 2.6.34

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Date:	Sat,  8 May 2010 06:45:09 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jason Baron <jbaron@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Tom Zanussi <tzanussi@...il.com>
Subject: [GIT PULL] perf fixlet for 2.6.34

Ingo,

Please pull the perf/urgent branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
	perf/urgent

Thanks,
	Frederic
---

Frederic Weisbecker (1):
      perf: Fix static strings treated like dynamic ones


 tools/perf/util/trace-event-parse.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

---
commit c236e02b1c5adba76022e349ceff9dd60a00a2b8
Author: Frederic Weisbecker <fweisbec@...il.com>
Date:   Wed May 5 22:07:39 2010 +0200

    perf: Fix static strings treated like dynamic ones
    
    The raw_field_ptr() helper, used to retrieve the address of a field
    inside a trace event, treats every strings as if they were dynamic
    ie: having a secondary level of indirection to retrieve their
    contents.
    
    FIELD_IS_STRING doesn't mean FIELD_IS_DYNAMIC, we only need to
    compute the secondary dereference for the latter case.
    
    This fixes perf sched segfaults, bad cmdline report and may be
    some other bugs.
    
    Reported-by: Jason Baron <jbaron@...hat.com>
    Reported-by: Arnaldo Carvalho de Melo <acme@...hat.com>
    Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
    Cc: Ingo Molnar <mingo@...e.hu>
    Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
    Cc: Paul Mackerras <paulus@...ba.org>
    Cc: Tom Zanussi <tzanussi@...il.com>

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 9b3c20f..613c9cc 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1925,7 +1925,7 @@ void *raw_field_ptr(struct event *event, const char *name, void *data)
 	if (!field)
 		return NULL;
 
-	if (field->flags & FIELD_IS_STRING) {
+	if (field->flags & FIELD_IS_DYNAMIC) {
 		int offset;
 
 		offset = *(int *)(data + field->offset);
--
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