1 # SPDX-License-Identifier: GPL-2.0 2 # GCC and Clang accept backend options differently. Do not wrap in cc-option, 3 # because Clang accepts "--param" even if it is unused. 4 ifdef CONFIG_CC_IS_CLANG 5 cc-param = -mllvm -$(1) 6 else 7 cc-param = --param $(1) 8 endif 9 10 # Keep most options here optional, to allow enabling more compilers if absence 11 # of some options does not break KCSAN nor causes false positive reports. 12 kcsan-cflags := -fsanitize=thread -fno-optimize-sibling-calls \ 13 $(call cc-option,$(call cc-param,tsan-compound-read-before-write=1),$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1))) \ 14 $(call cc-param,tsan-distinguish-volatile=1) 15 16 ifdef CONFIG_CC_IS_GCC 17 # GCC started warning about operations unsupported by the TSan runtime. But 18 # KCSAN != TSan, so just ignore these warnings. 19 kcsan-cflags += -Wno-tsan 20 endif 21 22 ifndef CONFIG_KCSAN_WEAK_MEMORY 23 kcsan-cflags += $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0)) 24 endif 25 26 export CFLAGS_KCSAN := $(kcsan-cflags)
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.