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26 lines
1004 B
26 lines
1004 B
# SPDX-License-Identifier: GPL-2.0 |
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# GCC and Clang accept backend options differently. Do not wrap in cc-option, |
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# because Clang accepts "--param" even if it is unused. |
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ifdef CONFIG_CC_IS_CLANG |
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cc-param = -mllvm -$(1) |
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else |
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cc-param = --param $(1) |
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endif |
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# Keep most options here optional, to allow enabling more compilers if absence |
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# of some options does not break KCSAN nor causes false positive reports. |
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kcsan-cflags := -fsanitize=thread -fno-optimize-sibling-calls \ |
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$(call cc-option,$(call cc-param,tsan-compound-read-before-write=1),$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1))) \ |
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$(call cc-param,tsan-distinguish-volatile=1) |
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ifdef CONFIG_CC_IS_GCC |
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# GCC started warning about operations unsupported by the TSan runtime. But |
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# KCSAN != TSan, so just ignore these warnings. |
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kcsan-cflags += -Wno-tsan |
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endif |
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ifndef CONFIG_KCSAN_WEAK_MEMORY |
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kcsan-cflags += $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0)) |
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endif |
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export CFLAGS_KCSAN := $(kcsan-cflags)
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