commit 129d8743b9bb3961fc74704c3d9d22ca772fec13
author Hridya Valsaraju <hridya@google.com> Tue Apr 13 14:30:25 2021 -0700
committer Hridya Valsaraju <hridya@google.com> Fri Apr 16 13:59:15 2021 -0700
tree eb703f7f81f3ef0d37257b2865d7c645684b7c01
parent d723f21fecce6257779e6b8bf2bbf317da3026f8

Prevent debugfs unmount on debug builds with a persist property

In order to simplify developer/test flow, the persistent property
persist.dbg.keep_debugfs_mounted can be set to prevent debugfs from
being unmounted on boot.

Bug: 184381659
Test: build and boot
Change-Id: I714616b361e6c8fb59633ec0763f9bd55af7df0e

rootdir/init-debug.rc

diff --git a/rootdir/init-debug.rc b/rootdir/init-debug.rc
index deb2411..77a80cd 100644
--- a/rootdir/init-debug.rc
+++ b/rootdir/init-debug.rc
@@ -11,5 +11,6 @@
     mount debugfs debugfs /sys/kernel/debug
     chmod 0755 /sys/kernel/debug
 
-on property:sys.boot_completed=1 && property:ro.product.debugfs_restrictions.enabled=true
+on property:sys.boot_completed=1 && property:ro.product.debugfs_restrictions.enabled=true && \
+   property:persist.dbg.keep_debugfs_mounted=""
    umount /sys/kernel/debug