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platform_system_core/rootdir/init.trace.rc

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Enable tracing on user builds This change adds init.rc steps to: * allow kernel tracing to be enabled via adb * allow a limited set of kernel trace events to be enabled via adb * allow the kernel trace to be read via adb * allow all users to write to the kernel trace from userland Bug: 6513400 Change-Id: Ic3c189b5697aa5edf88d2f507c932971bed6caff
2012-06-07 03:12:48 +02:00
## Permissions to allow system-wide tracing to the kernel trace buffer.
##
init.trace.rc: fix race condition with class_start core The systrace permissions from init.trace.rc and the "class_start core" which launches surfaceflinger are both in an "on boot" section. However, the init.trace.rc commands are parsed after all commands in init.rc. This means that "class_start core" is executed before the chmod command which allows processes to write to trace_marker. If any services execute their first trace command before the chmod occurs, then that service won't be able to write traces until the service is restarted. To fix this, run all of the init.trace.rc commands in the "early-boot" section to ensure they are completed first. Bug: 17612265 Change-Id: Ibf544762173d5ba98272c66ef485d8eab7d70bf3
2014-09-30 17:09:10 +02:00
on early-boot
Enable tracing on user builds This change adds init.rc steps to: * allow kernel tracing to be enabled via adb * allow a limited set of kernel trace events to be enabled via adb * allow the kernel trace to be read via adb * allow all users to write to the kernel trace from userland Bug: 6513400 Change-Id: Ic3c189b5697aa5edf88d2f507c932971bed6caff
2012-06-07 03:12:48 +02:00
# Allow writing to the kernel trace log.
chmod 0222 /sys/kernel/debug/tracing/trace_marker
# Allow the shell group to enable (some) kernel tracing.
chown root shell /sys/kernel/debug/tracing/trace_clock
chown root shell /sys/kernel/debug/tracing/buffer_size_kb
chown root shell /sys/kernel/debug/tracing/options/overwrite
Fix tracing on user builds Need the set correct permission for print-tgid option or tracing of sched can't work on user build. Change-Id: Ia88aabe58128b911afd78f01c27f7da884ed03f0 Signed-off-by: Carton He <carton.he@marvell.com>
2013-12-05 07:14:30 +01:00
chown root shell /sys/kernel/debug/tracing/options/print-tgid
Enable tracing on user builds This change adds init.rc steps to: * allow kernel tracing to be enabled via adb * allow a limited set of kernel trace events to be enabled via adb * allow the kernel trace to be read via adb * allow all users to write to the kernel trace from userland Bug: 6513400 Change-Id: Ic3c189b5697aa5edf88d2f507c932971bed6caff
2012-06-07 03:12:48 +02:00
chown root shell /sys/kernel/debug/tracing/events/sched/sched_switch/enable
chown root shell /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
chown root shell /sys/kernel/debug/tracing/events/power/cpu_frequency/enable
chown root shell /sys/kernel/debug/tracing/events/power/cpu_idle/enable
init.trace.rc: Set perms for power/clock_set_rate events Bug: 7351763 Change-Id: I1ee3d7c9b55d1b55df6cafb1bf21f9139d964646
2012-10-16 02:04:47 +02:00
chown root shell /sys/kernel/debug/tracing/events/power/clock_set_rate/enable
Enable tracing on user builds This change adds init.rc steps to: * allow kernel tracing to be enabled via adb * allow a limited set of kernel trace events to be enabled via adb * allow the kernel trace to be read via adb * allow all users to write to the kernel trace from userland Bug: 6513400 Change-Id: Ic3c189b5697aa5edf88d2f507c932971bed6caff
2012-06-07 03:12:48 +02:00
chown root shell /sys/kernel/debug/tracing/events/cpufreq_interactive/enable
chown root shell /sys/kernel/debug/tracing/tracing_on
chmod 0664 /sys/kernel/debug/tracing/trace_clock
chmod 0664 /sys/kernel/debug/tracing/buffer_size_kb
chmod 0664 /sys/kernel/debug/tracing/options/overwrite
Fix tracing on user builds Need the set correct permission for print-tgid option or tracing of sched can't work on user build. Change-Id: Ia88aabe58128b911afd78f01c27f7da884ed03f0 Signed-off-by: Carton He <carton.he@marvell.com>
2013-12-05 07:14:30 +01:00
chmod 0664 /sys/kernel/debug/tracing/options/print-tgid
Enable tracing on user builds This change adds init.rc steps to: * allow kernel tracing to be enabled via adb * allow a limited set of kernel trace events to be enabled via adb * allow the kernel trace to be read via adb * allow all users to write to the kernel trace from userland Bug: 6513400 Change-Id: Ic3c189b5697aa5edf88d2f507c932971bed6caff
2012-06-07 03:12:48 +02:00
chmod 0664 /sys/kernel/debug/tracing/events/sched/sched_switch/enable
chmod 0664 /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
chmod 0664 /sys/kernel/debug/tracing/events/power/cpu_frequency/enable
chmod 0664 /sys/kernel/debug/tracing/events/power/cpu_idle/enable
init.trace.rc: Set perms for power/clock_set_rate events Bug: 7351763 Change-Id: I1ee3d7c9b55d1b55df6cafb1bf21f9139d964646
2012-10-16 02:04:47 +02:00
chmod 0664 /sys/kernel/debug/tracing/events/power/clock_set_rate/enable
Enable tracing on user builds This change adds init.rc steps to: * allow kernel tracing to be enabled via adb * allow a limited set of kernel trace events to be enabled via adb * allow the kernel trace to be read via adb * allow all users to write to the kernel trace from userland Bug: 6513400 Change-Id: Ic3c189b5697aa5edf88d2f507c932971bed6caff
2012-06-07 03:12:48 +02:00
chmod 0664 /sys/kernel/debug/tracing/events/cpufreq_interactive/enable
chmod 0664 /sys/kernel/debug/tracing/tracing_on
# Allow only the shell group to read and truncate the kernel trace.
chown root shell /sys/kernel/debug/tracing/trace
chmod 0660 /sys/kernel/debug/tracing/trace
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