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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-08-21 16:27:58 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-08-21 09:11:49 -0400 |
| commit | 6b7dca401cb148603158119c89319c85228a2a61 (patch) | |
| tree | 80cf732b6323ea9da7ded1eebe90c917cc08df86 /kernel/trace | |
| parent | bb730b5833b5bddf5cb226865e5f4496770d00b0 (diff) | |
| download | linux-6b7dca401cb148603158119c89319c85228a2a61.tar.gz linux-6b7dca401cb148603158119c89319c85228a2a61.tar.bz2 linux-6b7dca401cb148603158119c89319c85228a2a61.zip | |
tracing: Allow gcov profiling on only ftrace subsystem
Add GCOV_PROFILE_FTRACE to allow gcov profiling on only files in ftrace
subsystem. This config option will be used for checking kselftest/ftrace
coverage.
Link: http://lkml.kernel.org/r/153483647755.32472.4746349899604275441.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/Kconfig | 12 | ||||
| -rw-r--r-- | kernel/trace/Makefile | 5 |
2 files changed, 17 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index fd6754b88f87..aec44d838283 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -774,6 +774,18 @@ config TRACING_EVENTS_GPIO help Enable tracing events for gpio subsystem +config GCOV_PROFILE_FTRACE + bool "Enable GCOV profiling on ftrace subsystem" + depends on GCOV_KERNEL + help + Enable GCOV profiling on ftrace subsystem for checking + which functions/lines are tested. + + If unsure, say N. + + Note that on a kernel compiled with this config, ftrace will + run significantly slower. + endif # FTRACE endif # TRACING_SUPPORT diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index 98d53b39a8ee..f81dadbc7c4a 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -23,6 +23,11 @@ ifdef CONFIG_TRACING_BRANCHES KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING endif +# for GCOV coverage profiling +ifdef CONFIG_GCOV_PROFILE_FTRACE +GCOV_PROFILE := y +endif + CFLAGS_trace_benchmark.o := -I$(src) CFLAGS_trace_events_filter.o := -I$(src) |