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Subject[PATCH 12/12] Revert "perf record: Intercept all events"
Date
This reverts commit f5a2c3dce03621b55f84496f58adc2d1a87ca16f.

This patch is required for making "perf lock rec" work.
The commit f5a2c3dce0 changes write_event() of builtin-record.c .
And changed write_event() sometimes doesn't stop with perf lock rec.

I'm researching what makes write_event() loop infinity,
and noticed that there are some events with event_t->header.size == 0.
But the detail of the problem,
like kind of these events, isn't clear...

If you know something related to this problem,
could you tell me, Arnaldo?

Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
---
tools/perf/builtin-record.c | 28 ++++++++++------------------
1 files changed, 10 insertions(+), 18 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 7bb9ca1..614fa9a 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -113,24 +113,16 @@ static void write_output(void *buf, size_t size)

static void write_event(event_t *buf, size_t size)
{
- size_t processed_size = buf->header.size;
- event_t *ev = buf;
-
- do {
- /*
- * Add it to the list of DSOs, so that when we finish this
- * record session we can pick the available build-ids.
- */
- if (ev->header.type == PERF_RECORD_MMAP) {
- struct list_head *head = &dsos__user;
- if (ev->header.misc == 1)
- head = &dsos__kernel;
- __dsos__findnew(head, ev->mmap.filename);
- }
-
- ev = ((void *)ev) + ev->header.size;
- processed_size += ev->header.size;
- } while (processed_size < size);
+ /*
+ * Add it to the list of DSOs, so that when we finish this
+ * record session we can pick the available build-ids.
+ */
+ if (buf->header.type == PERF_RECORD_MMAP) {
+ struct list_head *head = &dsos__user;
+ if (buf->mmap.header.misc == 1)
+ head = &dsos__kernel;
+ __dsos__findnew(head, buf->mmap.filename);
+ }

write_output(buf, size);
}
--
1.6.5.2
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