1# SPDX-License-Identifier: GPL-2.0-only
 2menu "GCOV-based kernel profiling"
 3
 4config GCOV_KERNEL
 5	bool "Enable gcov-based kernel profiling"
 6	depends on DEBUG_FS
 7	depends on !ARCH_WANTS_NO_INSTR || CC_HAS_NO_PROFILE_FN_ATTR
 8	select CONSTRUCTORS
 9	default n
10	help
11	This option enables gcov-based code profiling (e.g. for code coverage
12	measurements).
13
14	If unsure, say N.
15
16	Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
17	for the entire kernel. To enable profiling for specific files or
18	directories, add a line similar to the following to the respective
19	Makefile:
20
21	For a single file (e.g. main.o):
22	        GCOV_PROFILE_main.o := y
23
24	For all files in one directory:
25	        GCOV_PROFILE := y
26
27	To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
28	is specified, use:
29
30	        GCOV_PROFILE_main.o := n
31	and:
32	        GCOV_PROFILE := n
33
34	Note that the debugfs filesystem has to be mounted to access
35	profiling data.
36
37config ARCH_HAS_GCOV_PROFILE_ALL
38	def_bool n
39
40config GCOV_PROFILE_ALL
41	bool "Profile entire Kernel"
42	depends on !COMPILE_TEST
43	depends on GCOV_KERNEL
44	depends on ARCH_HAS_GCOV_PROFILE_ALL
45	default n
46	help
47	This options activates profiling for the entire kernel.
48
49	If unsure, say N.
50
51	Note that a kernel compiled with profiling flags will be significantly
52	larger and run slower. Also be sure to exclude files from profiling
53	which are not linked to the kernel image to prevent linker errors.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
54
55endmenu

 1# SPDX-License-Identifier: GPL-2.0-only
 2menu "GCOV-based kernel profiling"
 3
 4config GCOV_KERNEL
 5	bool "Enable gcov-based kernel profiling"
 6	depends on DEBUG_FS
 
 7	select CONSTRUCTORS
 8	default n
 9	---help---
10	This option enables gcov-based code profiling (e.g. for code coverage
11	measurements).
12
13	If unsure, say N.
14
15	Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
16	for the entire kernel. To enable profiling for specific files or
17	directories, add a line similar to the following to the respective
18	Makefile:
19
20	For a single file (e.g. main.o):
21	        GCOV_PROFILE_main.o := y
22
23	For all files in one directory:
24	        GCOV_PROFILE := y
25
26	To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
27	is specified, use:
28
29	        GCOV_PROFILE_main.o := n
30	and:
31	        GCOV_PROFILE := n
32
33	Note that the debugfs filesystem has to be mounted to access
34	profiling data.
35
36config ARCH_HAS_GCOV_PROFILE_ALL
37	def_bool n
38
39config GCOV_PROFILE_ALL
40	bool "Profile entire Kernel"
41	depends on !COMPILE_TEST
42	depends on GCOV_KERNEL
43	depends on ARCH_HAS_GCOV_PROFILE_ALL
44	default n
45	---help---
46	This options activates profiling for the entire kernel.
47
48	If unsure, say N.
49
50	Note that a kernel compiled with profiling flags will be significantly
51	larger and run slower. Also be sure to exclude files from profiling
52	which are not linked to the kernel image to prevent linker errors.
53
54choice
55	prompt "Specify GCOV format"
56	depends on GCOV_KERNEL
57	depends on CC_IS_GCC
58	---help---
59	The gcov format is usually determined by the GCC version, and the
60	default is chosen according to your GCC version. However, there are
61	exceptions where format changes are integrated in lower-version GCCs.
62	In such a case, change this option to adjust the format used in the
63	kernel accordingly.
64
65config GCOV_FORMAT_3_4
66	bool "GCC 3.4 format"
67	depends on GCC_VERSION < 40700
68	---help---
69	Select this option to use the format defined by GCC 3.4.
70
71config GCOV_FORMAT_4_7
72	bool "GCC 4.7 format"
73	---help---
74	Select this option to use the format defined by GCC 4.7.
75
76endchoice
77
78endmenu