[PATCH 1/4] perf: add PERF_SAMPLE_BRANCH_CALL

Stephane Eranian
2015-10-13T07:09:55Z

Add a new branch sample type to cover only call branches (function calls).
The current ANY_CALL included direct, indirect calls and far jumps.

We want to be able to differentiate indirect from direct calls. Therefore
we introduce PERF_SAMPLE_BRANCH_CALL. The implementation is up to each
architecture.

Signed-off-by: Stephane Eranian <eranian@google.com>
---
include/uapi/linux/perf_event.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 2881145..e6c1b47 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -168,6 +168,7 @@ enum perf_branch_sample_type_shift {

PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = 11, /* call/ret stack */
PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT = 12, /* indirect jumps */
+ PERF_SAMPLE_BRANCH_CALL_SHIFT = 13, /* direct call */

PERF_SAMPLE_BRANCH_MAX_SHIFT /* non-ABI */
};
@@ -188,6 +189,7 @@ enum perf_branch_sample_type {

PERF_SAMPLE_BRANCH_CALL_STACK = 1U << PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT,
PERF_SAMPLE_BRANCH_IND_JUMP = 1U << PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT,
+ PERF_SAMPLE_BRANCH_CALL = 1U << PERF_SAMPLE_BRANCH_CALL_SHIFT,

PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
};
--
1.9.1