tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc
Source file repositories/reference/linux-study-clean/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc- Extension
.tc- Size
- 2274 bytes
- Lines
- 124
- 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 - restricts events based on pid notrace filtering
# requires: set_event events/sched set_event_pid set_event_notrace_pid
# flags: instance
do_reset() {
echo > set_event
echo > set_event_pid
echo > set_event_notrace_pid
echo 0 > options/event-fork
echo 0 > events/enable
clear_trace
echo 1 > tracing_on
}
fail() { #msg
cat trace
do_reset
echo $1
exit_fail
}
count_pid() {
pid=$@
cat trace | grep -v '^#' | sed -e 's/[^-]*-\([0-9]*\).*/\1/' | grep $pid | wc -l
}
count_no_pid() {
pid=$1
cat trace | grep -v '^#' | sed -e 's/[^-]*-\([0-9]*\).*/\1/' | grep -v $pid | wc -l
}
enable_system() {
system=$1
if [ -d events/$system ]; then
echo 1 > events/$system/enable
fi
}
enable_events() {
echo 0 > tracing_on
# Enable common groups of events, as all events can allow for
# events to be traced via scheduling that we don't care to test.
enable_system syscalls
enable_system rcu
enable_system block
enable_system exceptions
enable_system irq
enable_system net
enable_system power
enable_system signal
enable_system sock
enable_system timer
enable_system thermal
echo 1 > tracing_on
}
other_task() {
sleep .001 || usleep 1 || sleep 1
}
echo 0 > options/event-fork
do_reset
read mypid rest < /proc/self/stat
echo $mypid > set_event_notrace_pid
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.