Add a KASAN option to the kernel build
LLVM support for enabling KASAN has not yet landed so the option is not yet usable, but hopefully this will change soon. Reviewed by: imp, andrew MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29454
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@ -92,6 +92,16 @@ CFLAGS+= -fno-common
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# XXX LOCORE means "don't declare C stuff" not "for locore.s".
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ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
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KASAN_ENABLED!= grep KASAN opt_global.h || true ; echo
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.if !empty(KASAN_ENABLED)
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SAN_CFLAGS+= -fsanitize=kernel-address \
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-mllvm -asan-stack=true \
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-mllvm -asan-instrument-dynamic-allocas=true \
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-mllvm -asan-globals=true \
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-mllvm -asan-use-after-scope=true \
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-mllvm -asan-instrumentation-with-call-threshold=0
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.endif
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KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
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.if !empty(KCSAN_ENABLED)
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SAN_CFLAGS+= -fsanitize=thread
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@ -229,6 +229,7 @@ ZSTDIO opt_zstdio.h
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# Sanitizers
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COVERAGE opt_global.h
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KASAN opt_global.h
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KCOV
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KCSAN opt_global.h
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KUBSAN opt_global.h
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