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2521f2c2 PO |
1 | menu "GCOV-based kernel profiling" |
2 | ||
3 | config GCOV_KERNEL | |
4 | bool "Enable gcov-based kernel profiling" | |
d2c32258 | 5 | depends on DEBUG_FS |
947be5df | 6 | select CONSTRUCTORS if !UML |
2521f2c2 PO |
7 | default n |
8 | ---help--- | |
9 | This option enables gcov-based code profiling (e.g. for code coverage | |
10 | measurements). | |
11 | ||
12 | If unsure, say N. | |
13 | ||
14 | Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data | |
15 | for the entire kernel. To enable profiling for specific files or | |
16 | directories, add a line similar to the following to the respective | |
17 | Makefile: | |
18 | ||
19 | For a single file (e.g. main.o): | |
20 | GCOV_PROFILE_main.o := y | |
21 | ||
22 | For all files in one directory: | |
23 | GCOV_PROFILE := y | |
24 | ||
25 | To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL | |
26 | is specified, use: | |
27 | ||
28 | GCOV_PROFILE_main.o := n | |
29 | and: | |
30 | GCOV_PROFILE := n | |
31 | ||
32 | Note that the debugfs filesystem has to be mounted to access | |
33 | profiling data. | |
34 | ||
957e3fac RV |
35 | config ARCH_HAS_GCOV_PROFILE_ALL |
36 | def_bool n | |
37 | ||
2521f2c2 PO |
38 | config GCOV_PROFILE_ALL |
39 | bool "Profile entire Kernel" | |
cc622420 | 40 | depends on !COMPILE_TEST |
2521f2c2 | 41 | depends on GCOV_KERNEL |
957e3fac | 42 | depends on ARCH_HAS_GCOV_PROFILE_ALL |
2521f2c2 PO |
43 | default n |
44 | ---help--- | |
45 | This options activates profiling for the entire kernel. | |
46 | ||
47 | If unsure, say N. | |
48 | ||
49 | Note that a kernel compiled with profiling flags will be significantly | |
50 | larger and run slower. Also be sure to exclude files from profiling | |
51 | which are not linked to the kernel image to prevent linker errors. | |
52 | ||
17c568d6 FH |
53 | choice |
54 | prompt "Specify GCOV format" | |
55 | depends on GCOV_KERNEL | |
56 | default GCOV_FORMAT_AUTODETECT | |
57 | ---help--- | |
58 | The gcov format is usually determined by the GCC version, but there are | |
59 | exceptions where format changes are integrated in lower-version GCCs. | |
60 | In such a case use this option to adjust the format used in the kernel | |
61 | accordingly. | |
62 | ||
63 | If unsure, choose "Autodetect". | |
64 | ||
65 | config GCOV_FORMAT_AUTODETECT | |
66 | bool "Autodetect" | |
67 | ---help--- | |
68 | Select this option to use the format that corresponds to your GCC | |
69 | version. | |
70 | ||
71 | config GCOV_FORMAT_3_4 | |
72 | bool "GCC 3.4 format" | |
73 | ---help--- | |
74 | Select this option to use the format defined by GCC 3.4. | |
75 | ||
76 | config GCOV_FORMAT_4_7 | |
77 | bool "GCC 4.7 format" | |
78 | ---help--- | |
79 | Select this option to use the format defined by GCC 4.7. | |
80 | ||
81 | endchoice | |
82 | ||
2521f2c2 | 83 | endmenu |