Hello,
Here is the 2nd version of the series for improving ftracetest testcase using gcov/lcov. From previous version, I've added 6 new testcases for some tracers and ftrace basic features.
With this series, ftracetest coverage under kernel/trace/ is improved as below. (Note that this kernel enables ftrace startup tests)
Without new testcases Lines: 10563 17268 61.2 % Functions: 1114 1785 62.4 %
With new testcases Lines: 11703 17268 67.8 % Functions: 1262 1785 70.7 %
Of course we don't need to make it 100%, because ftracetest is a function/specification test, and there are functions and lines which never be called (like critical error detection :) ). Also, ftrace has some amount of code for perf and bpf subsystem which should be tested by perf/bpf tests. However, GCOV(LCOV) gives us a good insight into which functions are covered or not covered by the test cases. We can find which functions are not tested yet from the coverage information.
This series has some ftracetest framework improvements too, which are for debugging ftracetest itself.
Tracing/Gcov-kernel: - Add CONFIG_GCOV_PROFILE_FRACE, which enables gcov profiling only on tracing subsystem (under kernel/trace/). This may not needed for everyone (like a debugging feature). So it can be dropped anyway.
Ftracetest framework improvements: - Add --stop-fail for detecting failure soon. - Add --console for interactively debugging a testcase by shell. - Add testcase-number prefix to logfile for finding log easier. - Improve general init function - Call general init function after all testcases. - Remove init/cleanup code from all testcase (since general init function will fixed it up)
Testcase fixes: - Fix to check $comm availability. - Make checkbashisms clean
Testcase improvements: - Use loopback address instead of localhost - Improve kprobe on module testcase to load/unload module - Improve kprobe testcase to check log data - Improve kretprobe testcase to check log data - Test kprobe-event argument with various bitsize - Check set_event_pid result
Adding testcases: - Add kprobe event with $comm argument testcase - Add kprobe profile testcase - Add kprobe-event with symbol argument testcase - Add nop tracer testcase - Add trace_printk sample module testcase - Add ringbuffer size changing testcase - Add function profiling statistics testcase - Add max stack tracer testcase - Add function filter on module testcase - Add trace_pipe testcase - Add stacktrace ftrace filter command testcase - Add wakeup tracer testcase - Add wakeup_rt tracer testcase - Add blktrace testcase - Add ftrace cpumask testcase - Add ftrace output format testcase
TBD: Following testcase improvements are remaining. - Checking of various supported types (like u8, u64 etc.) testcases
Thank you,
---
Masami Hiramatsu (32): tracing: Allow gcov profiling on only ftrace subsystem selftests/ftrace: Add --stop-fail hidden option for debug selftests/ftrace: Add --console hidden option selftests/ftrace: Add case number prefix to logfile selftests/ftrace: More initialize features in initialize_ftrace selftests/ftrace: Add SPDX License Identifier to template selftests/ftrace: Cleanup ftrace after running test selftests/ftrace: Remove unneeded per-test init/cleanup ftrace selftests/ftrace: Fix to test kprobe $comm arg only if available selftests/ftrace: Fix checkbashisms errors selftests/ftrace: Use loopback address instead of localhost selftests/ftrace: Improve kprobe on module testcase to load/unload module selftests/ftrace: Improve kprobe testcase to check log data selftests/ftrace: Improve kretprobe testcase to check log data selftests/ftrace: Test kprobe-event argument with various bitsize selftests/ftrace: Check set_event_pid result selftests/ftrace: Add kprobe event with $comm argument testcase selftests/ftrace: Add kprobe profile testcase selftests/ftrace: Add a testcase for nop tracer selftests/ftrace: Add kprobe-event with symbol argument test selftests/ftrace: Add trace_printk sample module test selftests/ftrace: Add ringbuffer size changing testcase selftests/ftrace: Add function profiling stat testcase selftests/ftrace: Add max stack tracer testcase selftests/ftrace: Add function filter on module testcase selftests/ftrace: Add trace_pipe testcase selftests/ftrace: Add stacktrace ftrace filter command testcase selftests/ftrace: Add wakeup tracer testcase selftests/ftrace: Add wakeup_rt tracer testcase selftests/ftrace: Add ftrace cpumask testcase selftests/ftrace: Add output format testcase selftests/ftrace: Add blktrace testcase
kernel/trace/Kconfig | 13 +++ kernel/trace/Makefile | 5 + tools/testing/selftests/ftrace/config | 7 ++ tools/testing/selftests/ftrace/ftracetest | 32 ++++++- .../ftrace/test.d/00basic/print_format.tc | 51 +++++++++++ .../ftrace/test.d/00basic/ringbuffer_size.tc | 21 +++++ .../selftests/ftrace/test.d/00basic/trace_pipe.tc | 15 +++ .../selftests/ftrace/test.d/event/event-enable.tc | 8 -- .../selftests/ftrace/test.d/event/event-pid.tc | 6 + .../ftrace/test.d/event/subsystem-enable.tc | 8 -- .../ftrace/test.d/event/toplevel-enable.tc | 8 -- .../selftests/ftrace/test.d/event/trace_printk.tc | 27 ++++++ .../ftrace/test.d/ftrace/fgraph-filter-stack.tc | 4 - .../ftrace/test.d/ftrace/fgraph-filter.tc | 9 -- .../ftrace/test.d/ftrace/func-filter-pid.tc | 8 -- .../ftrace/test.d/ftrace/func-filter-stacktrace.tc | 12 +++ .../selftests/ftrace/test.d/ftrace/func_cpumask.tc | 34 +++++++ .../ftrace/test.d/ftrace/func_event_triggers.tc | 3 - .../ftrace/test.d/ftrace/func_mod_trace.tc | 24 +++++ .../ftrace/test.d/ftrace/func_profile_stat.tc | 23 +++++ .../ftrace/test.d/ftrace/func_profiler.tc | 4 - .../ftrace/test.d/ftrace/func_set_ftrace_file.tc | 13 --- .../ftrace/test.d/ftrace/func_stack_tracer.tc | 39 +++++++++ .../test.d/ftrace/func_traceonoff_triggers.tc | 11 -- tools/testing/selftests/ftrace/test.d/functions | 5 + .../ftrace/test.d/kprobe/add_and_remove.tc | 3 - .../selftests/ftrace/test.d/kprobe/busy_check.tc | 3 - .../selftests/ftrace/test.d/kprobe/kprobe_args.tc | 8 +- .../ftrace/test.d/kprobe/kprobe_args_comm.tc | 17 ++++ .../ftrace/test.d/kprobe/kprobe_args_string.tc | 5 - .../ftrace/test.d/kprobe/kprobe_args_symbol.tc | 39 +++++++++ .../ftrace/test.d/kprobe/kprobe_args_syntax.tc | 8 +- .../ftrace/test.d/kprobe/kprobe_args_type.tc | 52 +++++++---- .../ftrace/test.d/kprobe/kprobe_eventname.tc | 5 - .../ftrace/test.d/kprobe/kprobe_ftrace.tc | 9 -- .../ftrace/test.d/kprobe/kprobe_module.tc | 36 +++++++- .../ftrace/test.d/kprobe/kretprobe_args.tc | 9 +- .../ftrace/test.d/kprobe/kretprobe_maxactive.tc | 4 - .../ftrace/test.d/kprobe/multiple_kprobes.tc | 5 - .../selftests/ftrace/test.d/kprobe/probepoint.tc | 4 - .../selftests/ftrace/test.d/kprobe/profile.tc | 15 +++ tools/testing/selftests/ftrace/test.d/template | 1 .../testing/selftests/ftrace/test.d/tracer/blk.tc | 91 ++++++++++++++++++++ .../testing/selftests/ftrace/test.d/tracer/nop.tc | 22 +++++ .../selftests/ftrace/test.d/tracer/wakeup.tc | 25 +++++ .../selftests/ftrace/test.d/tracer/wakeup_rt.tc | 25 +++++ .../inter-event/trigger-extended-error-support.tc | 12 --- .../inter-event/trigger-field-variable-support.tc | 15 --- .../trigger-inter-event-combined-hist.tc | 15 --- .../inter-event/trigger-multi-actions-accept.tc | 14 --- .../inter-event/trigger-onmatch-action-hist.tc | 15 --- .../trigger-onmatch-onmax-action-hist.tc | 15 --- .../inter-event/trigger-onmax-action-hist.tc | 15 --- .../trigger-synthetic-event-createremove.tc | 12 --- .../ftrace/test.d/trigger/trigger-eventonoff.tc | 12 --- .../ftrace/test.d/trigger/trigger-filter.tc | 14 --- .../ftrace/test.d/trigger/trigger-hist-mod.tc | 12 --- .../ftrace/test.d/trigger/trigger-hist.tc | 12 --- .../ftrace/test.d/trigger/trigger-multihist.tc | 16 ---- .../ftrace/test.d/trigger/trigger-snapshot.tc | 12 --- .../ftrace/test.d/trigger/trigger-stacktrace.tc | 12 --- .../test.d/trigger/trigger-trace-marker-hist.tc | 11 -- .../trigger/trigger-trace-marker-snapshot.tc | 16 ---- .../trigger-trace-marker-synthetic-kernel.tc | 12 --- .../trigger/trigger-trace-marker-synthetic.tc | 12 --- .../ftrace/test.d/trigger/trigger-traceonoff.tc | 12 --- 66 files changed, 630 insertions(+), 412 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/print_format.tc create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc create mode 100644 tools/testing/selftests/ftrace/test.d/event/trace_printk.tc create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func-filter-stacktrace.tc create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_cpumask.tc create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_mod_trace.tc create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_comm.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/profile.tc create mode 100644 tools/testing/selftests/ftrace/test.d/tracer/blk.tc create mode 100644 tools/testing/selftests/ftrace/test.d/tracer/nop.tc create mode 100644 tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc create mode 100644 tools/testing/selftests/ftrace/test.d/tracer/wakeup_rt.tc
-- Masami Hiramatsu (Linaro)