@@ -743,8 +743,8 @@ config KCOV
bool "Code coverage for fuzzing"
depends on ARCH_HAS_KCOV
select DEBUG_FS
- select GCC_PLUGINS if !COMPILE_TEST
- select GCC_PLUGIN_SANCOV if !COMPILE_TEST
+ imply GCC_PLUGINS
+ imply GCC_PLUGIN_SANCOV
help
KCOV exposes kernel code coverage information in a form suitable
for coverage-guided fuzzing (randomized testing).
@@ -758,7 +758,6 @@ config KCOV
config KCOV_ENABLE_COMPARISONS
bool "Enable comparison operands collection by KCOV"
depends on KCOV
- default n
help
KCOV also exposes operands of every comparison in the instrumented
code along with operand sizes and PCs of the comparison instructions.
@@ -768,7 +767,7 @@ config KCOV_ENABLE_COMPARISONS
config KCOV_INSTRUMENT_ALL
bool "Instrument all code by default"
depends on KCOV
- default y if KCOV
+ default y
help
If you are doing generic system call fuzzing (like e.g. syzkaller),
then you will want to instrument the whole kernel and you should
As Documentation/kbuild/kconfig-language.txt notes, 'select' should be used with care - it forces a lower limit of another symbol, ignoring the dependency. In this case, KCOV can select GCC_PLUGINS even if 'depends on HAVE_GCC_PLUGINS' is unmet. 'imply' is modest enough to observe the dependency, and this makes sense. If you enable KCOV, you will probably want to enable GCC_PLUGIN_SANCOV, but it should not break the dependency. I also remove unneeded code, I just happened to notice. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> --- lib/Kconfig.debug | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) -- 2.7.4