Commit-ID: de068ec048f807d4f62b7dda100c23a1365f086f
Gitweb: http://git.kernel.org/tip/de068ec048f807d4f62b7dda100c23a1365f086f
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Wed, 5 May 2010 22:07:39 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 11 May 2010 09:14:24 +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@xxxxxxxxxx>
Reported-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Tom Zanussi <tzanussi@xxxxxxxxx>
---
tools/perf/util/trace-event-parse.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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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