| # SPDX-License-Identifier: GPL-2.0 | |
| ifdef CONFIG_KCSAN | |
| # GCC and Clang accept backend options differently. Do not wrap in cc-option, | |
| # because Clang accepts "--param" even if it is unused. | |
| ifdef CONFIG_CC_IS_CLANG | |
| cc-param = -mllvm -$(1) | |
| else | |
| cc-param = --param -$(1) | |
| endif | |
| # Keep most options here optional, to allow enabling more compilers if absence | |
| # of some options does not break KCSAN nor causes false positive reports. | |
| CFLAGS_KCSAN := -fsanitize=thread \ | |
| $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0) -fno-optimize-sibling-calls) \ | |
| $(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1)) \ | |
| $(call cc-param,tsan-distinguish-volatile=1) | |
| endif # CONFIG_KCSAN |