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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
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
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.