tools/testing/selftests/bpf/test_ftrace.sh
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/test_ftrace.sh
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/test_ftrace.sh- Extension
.sh- Size
- 786 bytes
- Lines
- 45
- 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
function clear_trace
Annotated Snippet
#!/bin/bash
if [[ -e /sys/kernel/tracing/trace ]]; then
TR=/sys/kernel/tracing/
else
TR=/sys/kernel/debug/tracing/
fi
clear_trace() { # reset trace output
echo > $TR/trace
}
disable_tracing() { # stop trace recording
echo 0 > $TR/tracing_on
}
enable_tracing() { # start trace recording
echo 1 > $TR/tracing_on
}
reset_tracer() { # reset the current tracer
echo nop > $TR/current_tracer
}
disable_tracing
clear_trace
echo "" > $TR/set_ftrace_filter
echo '*printk* *console* *wake* *serial* *lock*' > $TR/set_ftrace_notrace
echo "bpf_prog_test*" > $TR/set_graph_function
echo "" > $TR/set_graph_notrace
echo function_graph > $TR/current_tracer
enable_tracing
./test_progs -t fentry
./test_progs -t fexit
disable_tracing
clear_trace
reset_tracer
exit 0
Annotation
- Detected declarations: `function clear_trace`.
- 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.