1 menu "GCOV-based kernel profiling"
4 bool "Enable gcov-based kernel profiling"
6 select CONSTRUCTORS if !UML
9 This option enables gcov-based code profiling (e.g. for code coverage
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
19 For a single file (e.g. main.o):
20 GCOV_PROFILE_main.o := y
22 For all files in one directory:
25 To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
28 GCOV_PROFILE_main.o := n
32 Note that the debugfs filesystem has to be mounted to access
35 config ARCH_HAS_GCOV_PROFILE_ALL
38 config GCOV_PROFILE_ALL
39 bool "Profile entire Kernel"
40 depends on !COMPILE_TEST
41 depends on GCOV_KERNEL
42 depends on ARCH_HAS_GCOV_PROFILE_ALL
45 This options activates profiling for the entire kernel.
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.
54 prompt "Specify GCOV format"
55 depends on GCOV_KERNEL
57 The gcov format is usually determined by the GCC version, and the
58 default is chosen according to your GCC version. However, there are
59 exceptions where format changes are integrated in lower-version GCCs.
60 In such a case, change this option to adjust the format used in the
63 config GCOV_FORMAT_3_4
65 depends on CC_IS_GCC && GCC_VERSION < 40700
67 Select this option to use the format defined by GCC 3.4.
69 config GCOV_FORMAT_4_7
72 Select this option to use the format defined by GCC 4.7.