From db49739f390992a3d68303765ac36f14ed09b68a Mon Sep 17 00:00:00 2001
From: Jamie Gennis <jgennis@google.com>
Date: Mon, 9 Apr 2012 16:01:30 -0700
Subject: [PATCH] Add tracing initialization to init.rc.

This change adds init.rc steps to allow kernel tracing to support inserting
messages from any userland process.

Change-Id: I01970728d7132a25408fed09a213a015ac05ccaf
---
 rootdir/init.rc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 71ec3fad8..dfe2479c9 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -370,6 +370,10 @@ service console /system/bin/sh
 on property:ro.debuggable=1
     start console
 
+# Allow writing to the kernel trace log.  Enabling tracing still requires root.
+on property:ro.debuggable=1
+    chmod 0222 /sys/kernel/debug/tracing/trace_marker
+
 # adbd is controlled via property triggers in init.<platform>.usb.rc
 service adbd /sbin/adbd
     class core