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Correct /sys/kernel/tracing permissions 

In Android kernels >4.4 we will see an empty /sys/kernel/tracing
directory which is notionally where you should mount tracefs if you
don't want to mount debugfs. As we move towards not mounting debugfs,
ensure that the non-legacy location also has adequate permissions to be
read by tracing tools.

Note that this change will be OK even if the board init.rc doesn't mount
tracefs here, because sysfs will always create this directory.

Bug: 148436518
Change-Id: I674587d0f08effdb8471a82e3b1ceec3af8588de
This commit is contained in:
Alistair Delva 2020-01-29 09:10:47 -08:00
parent be27975fff
commit ebb5b3bd48
1 changed files with 1 additions and 0 deletions
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1
rootdir/init.rc
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@ -489,6 +489,7 @@ on post-fs
on late-fs
# 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
# HALs required before storage encryption can get unlocked (FBE/FDE)