commit 98739483c9e05efc1fcfcdf205083feb26c1549c
author Oleg Matcovschi <omatcovschi@google.com> Mon Mar 14 06:29:25 2022 -0700
committer Oleg Matcovschi <omatcovschi@google.com> Mon Mar 14 09:29:27 2022 -0700
tree f71a9f8f8c548e7607ac5ad2127fe25b38fac47c
parent f933141681761b5d8fe3d2bc5f97b22055ddb4fe

microdroid: init.rc: add tracefs for debug boot

Bug: 224495502
Signed-off-by: Oleg Matcovschi <omatcovschi@google.com>
Change-Id: Ie91595d9363c785497d225f7e882d4acf0d3a2bc

microdroid/init.rc

diff --git a/microdroid/init.rc b/microdroid/init.rc
index 5f0001f..2ccdc3b 100644
--- a/microdroid/init.rc
+++ b/microdroid/init.rc
@@ -83,6 +83,10 @@
 
     setprop ro.debuggable ${ro.boot.microdroid.debuggable:-0}
 
+on init && property:ro.boot.microdroid.debuggable=1
+    # Mount tracefs (with GID=AID_READTRACEFS)
+    mount tracefs tracefs /sys/kernel/tracing gid=3012
+
 on init && property:ro.boot.logd.enabled=1
     # Start logd before any other services run to ensure we capture all of their logs.
     start logd
@@ -144,6 +148,12 @@
     mkdir /data/misc/authfs 0700 root root
     start authfs_service
 
+on late-fs && property:ro.debuggable=1
+    # Ensure that tracefs has the correct permissions.
+    # This does not work correctly if it is called in post-fs.
+    chmod 0755 /sys/kernel/tracing
+    chmod 0755 /sys/kernel/debug/tracing
+
 on post-fs-data
     mark_post_data