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Subject[PATCH 1/2] Does raw_field_ptr() supports __data_loc?
VERY very sorry for my long silence...

Please don't commit this patch, Ingo.
This patch is required to test the next patch for perf lock.

I have a question for Steven Rostedt and Tom Zanussi.
Does current raw_field_ptr() support __data_loc?

At 064739bc4b3d7f424b2f25547e6611bcf0132415 ,
support for the modifier "__data_loc" of format is added.

But, when I wanted to parse format of lock_acquired (or some event else),
raw_field_ptr() did not returned correct pointer.

So I modified raw_field_ptr() like this patch. Then raw_field_ptr() works well.
Parser was large so I'd like to ask you about this.

Cc: Frederic Weisbecker <>
Cc: Peter Zijlstra <>
Cc: Paul Mackerras <>
Cc: Tom Zanussi <>
Cc: Steven Rostedt <>

I have a question
tools/perf/util/trace-event-parse.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 0302405..494a470 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1925,6 +1925,13 @@ void *raw_field_ptr(struct event *event, const char *name, void *data)
if (!field)
return NULL;

+ if (field->flags & FIELD_IS_STRING) {
+ int offset;
+ offset = *(int *)(data + field->offset);
+ offset &= 0xffff;
+ return data + offset;
+ }
return data + field->offset;


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