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