commit 9d19a054224cbc7145e39f33dd52b509aa1593b2
author Kyle Lin <kylelin@google.com> Thu Apr 23 23:19:25 2020 +0800
committer Kyle Lin <kylelin@google.com> Thu Apr 30 02:15:42 2020 +0800
tree 0f805ee97ece19098c805e19b3ab6cb6a8ab1f10
parent 597559a6fc8c9907e0a0728c6b7b6f0c2ad22608

rootdir: init.rc: mount tracefs

Bug: 153849221
Test: build and try to capture the trace by perfetto and systrace
Change-Id: Ie8a13e12038bd66afcd264079a2c5f25daaa20ee

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 6564e8f..a380ebb 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -78,6 +78,9 @@
     mkdir /dev/boringssl 0755 root root
     mkdir /dev/boringssl/selftest 0755 root root
 
+    # Mount tracefs
+    mount tracefs tracefs /sys/kernel/tracing
+
 # Run boringssl self test for each ABI so that later processes can skip it. http://b/139348610
 on early-init && property:ro.product.cpu.abilist32=*
     exec_start boringssl_self_test32