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Diffstat (limited to 'kernel/gcov/Kconfig')
-rw-r--r-- | kernel/gcov/Kconfig | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig new file mode 100644 index 000000000..c92e44855 --- /dev/null +++ b/kernel/gcov/Kconfig @@ -0,0 +1,82 @@ +menu "GCOV-based kernel profiling" + +config GCOV_KERNEL + bool "Enable gcov-based kernel profiling" + depends on DEBUG_FS + select CONSTRUCTORS if !UML + default n + ---help--- + This option enables gcov-based code profiling (e.g. for code coverage + measurements). + + If unsure, say N. + + Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data + for the entire kernel. To enable profiling for specific files or + directories, add a line similar to the following to the respective + Makefile: + + For a single file (e.g. main.o): + GCOV_PROFILE_main.o := y + + For all files in one directory: + GCOV_PROFILE := y + + To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL + is specified, use: + + GCOV_PROFILE_main.o := n + and: + GCOV_PROFILE := n + + Note that the debugfs filesystem has to be mounted to access + profiling data. + +config ARCH_HAS_GCOV_PROFILE_ALL + def_bool n + +config GCOV_PROFILE_ALL + bool "Profile entire Kernel" + depends on GCOV_KERNEL + depends on ARCH_HAS_GCOV_PROFILE_ALL + default n + ---help--- + This options activates profiling for the entire kernel. + + If unsure, say N. + + Note that a kernel compiled with profiling flags will be significantly + larger and run slower. Also be sure to exclude files from profiling + which are not linked to the kernel image to prevent linker errors. + +choice + prompt "Specify GCOV format" + depends on GCOV_KERNEL + default GCOV_FORMAT_AUTODETECT + ---help--- + The gcov format is usually determined by the GCC version, but there are + exceptions where format changes are integrated in lower-version GCCs. + In such a case use this option to adjust the format used in the kernel + accordingly. + + If unsure, choose "Autodetect". + +config GCOV_FORMAT_AUTODETECT + bool "Autodetect" + ---help--- + Select this option to use the format that corresponds to your GCC + version. + +config GCOV_FORMAT_3_4 + bool "GCC 3.4 format" + ---help--- + Select this option to use the format defined by GCC 3.4. + +config GCOV_FORMAT_4_7 + bool "GCC 4.7 format" + ---help--- + Select this option to use the format defined by GCC 4.7. + +endchoice + +endmenu |