tools/testing/selftests/ftrace/test.d/event/toplevel-enable.tc

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/ftrace/test.d/event/toplevel-enable.tc
Extension
.tc
Size
793 bytes
Lines
53
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 top level files
# requires: set_event events/enable
# flags: instance

do_reset() {
    echo > set_event
    clear_trace
}

fail() { #msg
    echo $1
    exit_fail
}

echo '*:*' > set_event

yield

echo 0 > tracing_on

count=`head -n 128 trace | grep -v ^# | wc -l`
if [ $count -eq 0 ]; then
    fail "none of events are recorded"
fi

do_reset

echo 1 > events/enable
echo 1 > tracing_on

yield

echo 0 > tracing_on
count=`head -n 128 trace | grep -v ^# | wc -l`
if [ $count -eq 0 ]; then
    fail "none of events are recorded"
fi

do_reset

echo 0 > events/enable

yield

count=`cat trace | grep -v ^# | wc -l`
if [ $count -ne 0 ]; then
    fail "any of events should not be recorded"
fi

exit 0

Annotation

Implementation Notes