tools/testing/selftests/ftrace/test.d/event/event-mod.tc

Source file repositories/reference/linux-study-clean/tools/testing/selftests/ftrace/test.d/event/event-mod.tc

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/ftrace/test.d/event/event-mod.tc
Extension
.tc
Size
4103 bytes
Lines
192
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: event tracing - enable/disable with module event
# requires: set_event "Can enable module events via: :mod:":README
# flags: instance

rmmod trace-events-sample ||:
if ! modprobe trace-events-sample ; then
  echo "No trace-events sample module - please make CONFIG_SAMPLE_TRACE_EVENTS=m"
  exit_unresolved;
fi
trap "rmmod trace-events-sample" EXIT

# Set events for the module
echo ":mod:trace-events-sample" > set_event

test_all_enabled() {

	# Check if more than one is enabled
	grep -q sample-trace:foo_bar set_event
	grep -q sample-trace:foo_bar_with_cond set_event
	grep -q sample-trace:foo_bar_with_fn set_event

	# All of them should be enabled. Check via the enable file
	val=`cat events/sample-trace/enable`
	if [ $val -ne 1 ]; then
		exit_fail
	fi
}

clear_events() {
	echo > set_event
	val=`cat events/enable`
	if [ "$val" != "0" ]; then
		exit_fail
	fi
	count=`cat set_event | wc -l`
	if [ $count -ne 0 ]; then
		exit_fail
	fi
}

test_all_enabled

echo clear all events
echo 0 > events/enable

echo Confirm the events are disabled
val=`cat events/sample-trace/enable`
if [ $val -ne 0 ]; then
	exit_fail
fi

echo And the set_event file is empty

cnt=`wc -l set_event`
if [ $cnt -ne 0 ]; then
	exit_fail
fi

echo now enable all events
echo 1 > events/enable

echo Confirm the events are enabled again
val=`cat events/sample-trace/enable`
if [ $val -ne 1 ]; then
	exit_fail
fi

echo disable just the module events

Annotation

Implementation Notes