Don't instrument the rdtsc ifunc when building with ASAN/UBSAN

The ifunc resolver is called before the sanitizer runtime is initialized,
so any instrumentation results in an immediate crash.

Reviewed By:	kib
Differential Revision: https://reviews.freebsd.org/D31046

This commit is contained in:

Alex Richardson

2021-08-02 09:51:01 +01:00

parent 5e9226f063

commit f0712132b6

1 changed files with 8 additions and 0 deletions

									
										lib/libc/x86/sys/Makefile.inc
									
		+8
		
												View File
												
				@@ -12,3 +12,11 @@ MAN+=	\

				.if ${MACHINE_CPUARCH} == "amd64" && ${MK_HYPERV} != "no"

				CFLAGS+=	-DWANT_HYPERV

				.endif

				# We can't use sanitizer instrumentation on ifuncs called during sanitizer

				# runtime startup.

				.if ${MK_ASAN} != "no"

				CFLAGS.__vdso_gettc.c+=-fno-sanitize=address

				.endif

				.if ${MK_UBSAN} != "no"

				CFLAGS.__vdso_gettc.c+=-fno-sanitize=undefined

				.endif