| # SPDX-License-Identifier: GPL-2.0 |
| # 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. |
| kcsan-cflags := -fsanitize=thread -fno-optimize-sibling-calls \ |
| $(call cc-option,$(call cc-param,tsan-compound-read-before-write=1),$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1))) \ |
| $(call cc-param,tsan-distinguish-volatile=1) |
| |
| ifdef CONFIG_CC_IS_GCC |
| # GCC started warning about operations unsupported by the TSan runtime. But |
| # KCSAN != TSan, so just ignore these warnings. |
| kcsan-cflags += -Wno-tsan |
| endif |
| |
| ifndef CONFIG_KCSAN_WEAK_MEMORY |
| kcsan-cflags += $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0)) |
| endif |
| |
| export CFLAGS_KCSAN := $(kcsan-cflags) |
