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From: mhiramat@kernel.org (Masami Hiramatsu)
Subject: [PATCH 01/25] tracing: Allow gcov profiling on only ftrace subsystem
Date: Fri, 27 Jul 2018 21:10:25 +0900	[thread overview]
Message-ID: <153269342571.3084.3307543750811437921.stgit@devbox> (raw)
Message-ID: <20180727121025.SlmQrLjjP0RhtrAOSdxCzrgdemLeeeWagfCNX68uPlM@z> (raw)
In-Reply-To: <153269339575.3084.16279591141931053689.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 at 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 a47f77d27673..a628e8cbc1ef 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -722,6 +722,19 @@ 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 e2538c7638d4..443d53392f61 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -18,6 +18,11 @@ 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)
 

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  reply	other threads:[~2018-07-27 12:10 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-27 12:09 [PATCH 00/25] selftests/ftrace: Improve ftracetest with coverage check Masami Hiramatsu
2018-07-27 12:09 ` Masami Hiramatsu
2018-07-27 12:09 ` mhiramat
2018-07-27 12:10 ` Masami Hiramatsu [this message]
2018-07-27 12:10   ` [PATCH 01/25] tracing: Allow gcov profiling on only ftrace subsystem Masami Hiramatsu
2018-07-27 12:10   ` mhiramat
2018-07-27 12:10 ` [PATCH 02/25] selftests/ftrace: Add --stop-fail hidden option for debug Masami Hiramatsu
2018-07-27 12:10   ` Masami Hiramatsu
2018-07-27 12:10   ` mhiramat
2018-07-27 12:11 ` [PATCH 03/25] selftests/ftrace: Add --console hidden option Masami Hiramatsu
2018-07-27 12:11   ` Masami Hiramatsu
2018-07-27 12:11   ` mhiramat
2018-07-27 12:11 ` [PATCH 04/25] selftests/ftrace: Add case number prefix to logfile Masami Hiramatsu
2018-07-27 12:11   ` Masami Hiramatsu
2018-07-27 12:11   ` mhiramat
2018-07-27 12:12 ` [PATCH 05/25] selftests/ftrace: More initialize features in initialize_ftrace Masami Hiramatsu
2018-07-27 12:12   ` Masami Hiramatsu
2018-07-27 12:12   ` mhiramat
2018-07-27 12:12 ` [PATCH 06/25] selftests/ftrace: Cleanup ftrace after running test Masami Hiramatsu
2018-07-27 12:12   ` Masami Hiramatsu
2018-07-27 12:12   ` mhiramat
2018-07-27 12:13 ` [PATCH 07/25] selftests/ftrace: Remove unneeded per-test init/cleanup ftrace Masami Hiramatsu
2018-07-27 12:13   ` Masami Hiramatsu
2018-07-27 12:13   ` mhiramat
2018-07-27 12:13 ` [PATCH 08/25] selftests/ftrace: Fix to test kprobe $comm arg only if available Masami Hiramatsu
2018-07-27 12:13   ` Masami Hiramatsu
2018-07-27 12:13   ` mhiramat
2018-07-27 12:14 ` [PATCH 09/25] selftests/ftrace: Fix checkbashisms errors Masami Hiramatsu
2018-07-27 12:14   ` Masami Hiramatsu
2018-07-27 12:14   ` mhiramat
2018-07-27 12:14 ` [PATCH 10/25] selftests/ftrace: Use loopback address instead of localhost Masami Hiramatsu
2018-07-27 12:14   ` Masami Hiramatsu
2018-07-27 12:14   ` mhiramat
2018-07-27 12:15 ` [PATCH 11/25] selftests/ftrace: Improve kprobe on module testcase to load/unload module Masami Hiramatsu
2018-07-27 12:15   ` Masami Hiramatsu
2018-07-27 12:15   ` mhiramat
2018-08-02  1:02   ` Masami Hiramatsu
2018-08-02  1:02     ` Masami Hiramatsu
2018-08-02  1:02     ` mhiramat
2018-08-02  7:22     ` Masami Hiramatsu
2018-08-02  7:22       ` Masami Hiramatsu
2018-08-02  7:22       ` mhiramat
2018-07-27 12:15 ` [PATCH 12/25] selftests/ftrace: Improve kprobe testcase to check log data Masami Hiramatsu
2018-07-27 12:15   ` Masami Hiramatsu
2018-07-27 12:15   ` mhiramat
2018-07-27 12:16 ` [PATCH 13/25] selftests/ftrace: Improve kretprobe " Masami Hiramatsu
2018-07-27 12:16   ` Masami Hiramatsu
2018-07-27 12:16   ` mhiramat
2018-07-27 12:16 ` [PATCH 14/25] selftests/ftrace: Test kprobe-event argument with various bitsize Masami Hiramatsu
2018-07-27 12:16   ` Masami Hiramatsu
2018-07-27 12:16   ` mhiramat
2018-07-27 12:17 ` [PATCH 15/25] selftests/ftrace: Check set_event_pid result Masami Hiramatsu
2018-07-27 12:17   ` Masami Hiramatsu
2018-07-27 12:17   ` mhiramat
2018-07-27 12:17 ` [PATCH 16/25] selftests/ftrace: Add kprobe event with $comm argument testcase Masami Hiramatsu
2018-07-27 12:17   ` Masami Hiramatsu
2018-07-27 12:17   ` mhiramat
2018-07-27 12:17 ` [PATCH 17/25] selftests/ftrace: Add kprobe profile testcase Masami Hiramatsu
2018-07-27 12:17   ` Masami Hiramatsu
2018-07-27 12:17   ` mhiramat
2018-07-27 12:18 ` [PATCH 18/25] selftests/ftrace: Add a testcase for nop tracer Masami Hiramatsu
2018-07-27 12:18   ` Masami Hiramatsu
2018-07-27 12:18   ` mhiramat
2018-07-27 12:18 ` [PATCH 19/25] selftests/ftrace: Add kprobe-event with symbol argument test Masami Hiramatsu
2018-07-27 12:18   ` Masami Hiramatsu
2018-07-27 12:18   ` mhiramat
2018-07-27 12:19 ` [PATCH 20/25] selftests/ftrace: Add trace_printk sample module test Masami Hiramatsu
2018-07-27 12:19   ` Masami Hiramatsu
2018-07-27 12:19   ` mhiramat
2018-07-27 12:19 ` [PATCH 21/25] selftests/ftrace: Add ringbuffer size changing testcase Masami Hiramatsu
2018-07-27 12:19   ` Masami Hiramatsu
2018-07-27 12:19   ` mhiramat
2018-07-27 12:20 ` [PATCH 22/25] selftests/ftrace: Add function profiling stat testcase Masami Hiramatsu
2018-07-27 12:20   ` Masami Hiramatsu
2018-07-27 12:20   ` mhiramat
2018-07-27 12:20 ` [PATCH 23/25] selftests/ftrace: Add max stack tracer testcase Masami Hiramatsu
2018-07-27 12:20   ` Masami Hiramatsu
2018-07-27 12:20   ` mhiramat
2018-08-03  5:24   ` Masami Hiramatsu
2018-08-03  5:24     ` Masami Hiramatsu
2018-08-03  5:24     ` mhiramat
2018-07-27 12:21 ` [PATCH 24/25] selftests/ftrace: Add function filter on module testcase Masami Hiramatsu
2018-07-27 12:21   ` Masami Hiramatsu
2018-07-27 12:21   ` mhiramat
2018-07-27 12:21 ` [PATCH 25/25] selftests/ftrace: Add trace_pipe testcase Masami Hiramatsu
2018-07-27 12:21   ` Masami Hiramatsu
2018-07-27 12:21   ` mhiramat

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