From 0f85154117e91c7bdf7735e43325fb2cc6626c3a Mon Sep 17 00:00:00 2001
From: Tim Murray <timmurray@google.com>
Date: Tue, 21 Apr 2020 10:05:09 -0700
Subject: [PATCH] mark atrace buffers as uninitialized

The atrace buffer does not need to be zero-initialized every time.

Test: memset calls from atrace_{begin,end}_body are gone
bug 155788214

Change-Id: I8082b6a9e6d6328f4aee3a22137977e9fae21933
---
 libcutils/trace-dev.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcutils/trace-dev.inc b/libcutils/trace-dev.inc
index 3ec98b3a6..654342649 100644
--- a/libcutils/trace-dev.inc
+++ b/libcutils/trace-dev.inc
@@ -198,7 +198,7 @@ void atrace_update_tags()
 }
 
 #define WRITE_MSG(format_begin, format_end, name, value) { \
-    char buf[ATRACE_MESSAGE_LENGTH]; \
+    char buf[ATRACE_MESSAGE_LENGTH] __attribute__((uninitialized));     \
     int pid = getpid(); \
     int len = snprintf(buf, sizeof(buf), format_begin "%s" format_end, pid, \
         name, value); \