| # 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 |
