scripts/Makefile.kasan

   1 ifdef CONFIG_KASAN
   2 ifdef CONFIG_KASAN_INLINE
   3         call_threshold := 10000
   4 else
   5         call_threshold := 0
   6 endif
   7
   8 KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
   9
  10 CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
  11
  12 CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \
  13                 -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET) \
  14                 --param asan-stack=1 --param asan-globals=1 \
  15                 --param asan-instrumentation-with-call-threshold=$(call_threshold))
  16
  17 ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),)
  18    ifneq ($(CONFIG_COMPILE_TEST),y)
  19         $(warning Cannot use CONFIG_KASAN: \
  20             -fsanitize=kernel-address is not supported by compiler)
  21    endif
  22 else
  23     ifeq ($(CFLAGS_KASAN),)
  24         ifneq ($(CONFIG_COMPILE_TEST),y)
  25             $(warning CONFIG_KASAN: compiler does not support all options.\
  26                 Trying minimal configuration)
  27         endif
  28         CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
  29     endif
  30 endif
  31
  32 CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope)
  33 endif