Clang does not allow -fsanitize-coverage=trace-{pc,cmp} together
with -fsanitize=bounds or with ubsan:clang: error: argument unused during compilation: '-fsanitize-coverage=trace-pc' [-Werror,-Wunused-command-line-argument] clang: error: argument unused during compilation: '-fsanitize-coverage=trace-cmp' [-Werror,-Wunused-command-line-argument] To avoid that case, add a Kconfig dependency. The dependency could go either way, disabling CONFIG_KCOV or CONFIG_UBSAN_BOUNDS when the other is set. I picked the second option here as this seems to have a smaller impact on the resulting kernel. Signed-off-by: Arnd Bergmann <[email protected]> --- lib/Kconfig.kcsan | 2 +- lib/Kconfig.ubsan | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/Kconfig.kcsan b/lib/Kconfig.kcsan index ea28245c6c1d..8f856c8828d5 100644 --- a/lib/Kconfig.kcsan +++ b/lib/Kconfig.kcsan @@ -5,7 +5,7 @@ config HAVE_ARCH_KCSAN menuconfig KCSAN bool "KCSAN: dynamic data race detector" - depends on HAVE_ARCH_KCSAN && DEBUG_KERNEL && !KASAN + depends on HAVE_ARCH_KCSAN && DEBUG_KERNEL && !KASAN && !KCOV select STACKTRACE help The Kernel Concurrency Sanitizer (KCSAN) is a dynamic diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan index 929211039bac..f98ef029553e 100644 --- a/lib/Kconfig.ubsan +++ b/lib/Kconfig.ubsan @@ -29,6 +29,7 @@ config UBSAN_TRAP config UBSAN_BOUNDS bool "Perform array index bounds checking" default UBSAN + depends on !(CC_IS_CLANG && KCOV) help This option enables detection of directly indexed out of bounds array accesses, where the array size is known at compile time. -- 2.26.0
