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Diffstat (limited to 'kernel/gcov/Kconfig')
| -rw-r--r-- | kernel/gcov/Kconfig | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig new file mode 100644 index 0000000000..04f4ebdc3c --- /dev/null +++ b/kernel/gcov/Kconfig @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "GCOV-based kernel profiling" + +config GCOV_KERNEL + bool "Enable gcov-based kernel profiling" + depends on DEBUG_FS + depends on !ARCH_WANTS_NO_INSTR || CC_HAS_NO_PROFILE_FN_ATTR + select CONSTRUCTORS + 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 !COMPILE_TEST + 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. + +endmenu |