From: Masami Hiramatsu <mhiramat@kernel.org>
To: Shuah Khan <shuah@kernel.org>, Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 01/32] tracing: Allow gcov profiling on only ftrace subsystem
Date: Fri, 17 Aug 2018 01:29:39 +0900 [thread overview]
Message-ID: <153443697980.23257.9233992547183322108.stgit@devbox> (raw)
In-Reply-To: <153443695002.23257.13628220023468200991.stgit@devbox>
Add GCOV_PROFILE_FTRACE to allow gcov profiling
on only files in ftrace subsystem. This kconfig
flag will be used for checking kselftest/ftrace
coverage.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/Kconfig | 13 +++++++++++++
kernel/trace/Makefile | 5 +++++
2 files changed, 18 insertions(+)
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index fd6754b88f87..8decf6d8553a 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -774,6 +774,19 @@ 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 flags, ftrace will be
+ significantly run slower. So do not enable it for production
+ kernel.
+
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)
next prev parent reply other threads:[~2018-08-16 16:30 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 16:29 [PATCH v2 00/32] selftests/ftrace: Improve ftracetest with coverage check Masami Hiramatsu
2018-08-16 16:29 ` Masami Hiramatsu [this message]
2018-08-20 15:32 ` [PATCH v2 01/32] tracing: Allow gcov profiling on only ftrace subsystem Steven Rostedt
2018-08-20 15:33 ` Steven Rostedt
2018-08-21 6:53 ` Masami Hiramatsu
2018-08-21 7:27 ` [PATCH v2.1] " Masami Hiramatsu
2018-08-21 13:12 ` Steven Rostedt
2018-08-16 16:30 ` [PATCH v2 02/32] selftests/ftrace: Add --stop-fail hidden option for debug Masami Hiramatsu
2018-08-24 20:38 ` Steven Rostedt
2018-08-16 16:30 ` [PATCH v2 03/32] selftests/ftrace: Add --console hidden option Masami Hiramatsu
2018-08-24 20:37 ` Steven Rostedt
2018-08-25 1:35 ` Masami Hiramatsu
2018-08-25 1:42 ` Steven Rostedt
2018-08-26 7:28 ` Masami Hiramatsu
2018-08-16 16:31 ` [PATCH v2 04/32] selftests/ftrace: Add case number prefix to logfile Masami Hiramatsu
2018-08-24 21:47 ` Steven Rostedt
2018-08-16 16:31 ` [PATCH v2 05/32] selftests/ftrace: More initialize features in initialize_ftrace Masami Hiramatsu
2018-08-24 21:24 ` Steven Rostedt
2018-08-24 21:46 ` Steven Rostedt
2018-08-24 21:46 ` Steven Rostedt
2018-08-16 16:32 ` [PATCH v2 06/32] selftests/ftrace: Add SPDX License Identifier to template Masami Hiramatsu
2018-08-16 16:32 ` [PATCH v2 07/32] selftests/ftrace: Cleanup ftrace after running test Masami Hiramatsu
2018-08-16 16:32 ` [PATCH v2 08/32] selftests/ftrace: Remove unneeded per-test init/cleanup ftrace Masami Hiramatsu
2018-08-16 16:33 ` [PATCH v2 09/32] selftests/ftrace: Fix to test kprobe $comm arg only if available Masami Hiramatsu
2018-08-16 16:33 ` [PATCH v2 10/32] selftests/ftrace: Fix checkbashisms errors Masami Hiramatsu
2018-08-24 21:50 ` Steven Rostedt
2018-08-16 16:34 ` [PATCH v2 11/32] selftests/ftrace: Use loopback address instead of localhost Masami Hiramatsu
2018-08-24 21:52 ` Steven Rostedt
2018-08-25 1:47 ` Masami Hiramatsu
2018-08-16 16:34 ` [PATCH v2 12/32] selftests/ftrace: Improve kprobe on module testcase to load/unload module Masami Hiramatsu
2018-08-24 23:07 ` Steven Rostedt
2018-08-16 16:35 ` [PATCH v2 13/32] selftests/ftrace: Improve kprobe testcase to check log data Masami Hiramatsu
2018-08-16 16:35 ` [PATCH v2 14/32] selftests/ftrace: Improve kretprobe " Masami Hiramatsu
2018-08-16 16:36 ` [PATCH v2 15/32] selftests/ftrace: Test kprobe-event argument with various bitsize Masami Hiramatsu
2018-08-16 16:36 ` [PATCH v2 16/32] selftests/ftrace: Check set_event_pid result Masami Hiramatsu
2018-08-16 16:37 ` [PATCH v2 17/32] selftests/ftrace: Add kprobe event with $comm argument testcase Masami Hiramatsu
2018-08-16 16:37 ` [PATCH v2 18/32] selftests/ftrace: Add kprobe profile testcase Masami Hiramatsu
2018-08-16 16:38 ` [PATCH v2 19/32] selftests/ftrace: Add a testcase for nop tracer Masami Hiramatsu
2018-08-24 22:53 ` Steven Rostedt
2018-08-26 7:30 ` Masami Hiramatsu
2018-08-16 16:38 ` [PATCH v2 20/32] selftests/ftrace: Add kprobe-event with symbol argument test Masami Hiramatsu
2018-08-16 16:39 ` [PATCH v2 21/32] selftests/ftrace: Add trace_printk sample module test Masami Hiramatsu
2018-08-24 23:06 ` Steven Rostedt
2018-08-26 8:43 ` Masami Hiramatsu
2018-08-16 16:39 ` [PATCH v2 22/32] selftests/ftrace: Add ringbuffer size changing testcase Masami Hiramatsu
2018-08-24 23:18 ` Steven Rostedt
2018-08-30 7:12 ` Masami Hiramatsu
2018-08-30 15:50 ` Steven Rostedt
2018-08-30 23:35 ` Masami Hiramatsu
2018-08-30 23:40 ` Steven Rostedt
2018-08-16 16:40 ` [PATCH v2 23/32] selftests/ftrace: Add function profiling stat testcase Masami Hiramatsu
2018-08-24 23:20 ` Steven Rostedt
2018-08-26 11:20 ` Masami Hiramatsu
2018-08-16 16:40 ` [PATCH v2 24/32] selftests/ftrace: Add max stack tracer testcase Masami Hiramatsu
2018-08-24 23:23 ` Steven Rostedt
2018-08-25 1:45 ` Masami Hiramatsu
2018-08-25 2:41 ` Steven Rostedt
2018-08-26 8:42 ` Masami Hiramatsu
2018-08-16 16:40 ` [PATCH v2 25/32] selftests/ftrace: Add function filter on module testcase Masami Hiramatsu
2018-08-24 23:25 ` Steven Rostedt
2018-08-16 16:41 ` [PATCH v2 26/32] selftests/ftrace: Add trace_pipe testcase Masami Hiramatsu
2018-08-24 23:26 ` Steven Rostedt
2018-08-26 11:20 ` Masami Hiramatsu
2018-08-16 16:41 ` [PATCH v2 27/32] selftests/ftrace: Add stacktrace ftrace filter command testcase Masami Hiramatsu
2018-08-24 23:28 ` Steven Rostedt
2018-08-16 16:42 ` [PATCH v2 28/32] selftests/ftrace: Add wakeup tracer testcase Masami Hiramatsu
2018-08-16 16:42 ` [PATCH v2 29/32] selftests/ftrace: Add wakeup_rt " Masami Hiramatsu
2018-08-25 2:09 ` Steven Rostedt
2018-08-26 11:22 ` Masami Hiramatsu
2018-08-16 16:43 ` [PATCH v2 30/32] selftests/ftrace: Add ftrace cpumask testcase Masami Hiramatsu
2018-08-25 2:18 ` Steven Rostedt
2018-08-27 12:16 ` Masami Hiramatsu
2018-08-16 16:43 ` [PATCH v2 31/32] selftests/ftrace: Add output format testcase Masami Hiramatsu
2018-08-25 2:19 ` Steven Rostedt
2018-08-30 7:48 ` Masami Hiramatsu
2018-08-16 16:44 ` [PATCH v2 32/32] selftests/ftrace: Add blktrace testcase Masami Hiramatsu
2018-08-25 2:22 ` Steven Rostedt
2018-08-30 7:53 ` Masami Hiramatsu
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