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Restrict creation of bootreceiver tracing instance to 64-bit systems.

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The main users of this instance are KFENCE and MTE-aided KASAN, which are only supported on arm64.
Skip creation of this tracing instance on 32-bit systems to save ~6Mb memory on low-end devices.

Bug: 195089948
Bug: 194719088
Bug: 194156700
Test: manual on Pixel device
Merged-In: Icaf762715fed7a282b1ad738c10bcb45dc848f4d
Change-Id: I61694ce174fa745ef9fd50ca7464b5a9e1d1e011
This commit is contained in:
Alexander Potapenko 2021-08-03 07:47:40 +00:00
parent 1c496e94e0
commit c81fec7d8e
1 changed files with 2 additions and 1 deletions
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3
rootdir/init.rc
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@ -590,9 +590,10 @@ on late-fs
# Load trusted keys from dm-verity protected partitions
exec -- /system/bin/fsverity_init --load-verified-keys
on late-fs && property:ro.product.cpu.abilist64=*
# Set up a tracing instance for system_server to monitor error_report_end events.
# These are sent by kernel tools like KASAN and KFENCE when a memory corruption
# is detected.
# is detected. This is only needed for 64-bit systems.
mkdir /sys/kernel/tracing/instances/bootreceiver 0700 system system
restorecon_recursive /sys/kernel/tracing/instances/bootreceiver
write /sys/kernel/tracing/instances/bootreceiver/buffer_size_kb 1