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| author | Alex Richardson <arichardson@FreeBSD.org> | 2021-08-02 08:51:01 +0000 |
|---|---|---|
| committer | Alex Richardson <arichardson@FreeBSD.org> | 2021-08-02 13:33:24 +0000 |
| commit | f0712132b68b4271e0602b06ee5f282718bfb8c5 (patch) | |
| tree | 95f9e1d0b151d660e25cbd4f8e48d0ba591f2d95 | |
| parent | 5e9226f063bc43574e2168b4aafad8232f08002a (diff) | |
| download | src-f0712132b68b4271e0602b06ee5f282718bfb8c5.tar.gz src-f0712132b68b4271e0602b06ee5f282718bfb8c5.zip | |
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
| -rw-r--r-- | lib/libc/x86/sys/Makefile.inc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/libc/x86/sys/Makefile.inc b/lib/libc/x86/sys/Makefile.inc index 41e0d1a8ad66..eff3a1085ec6 100644 --- a/lib/libc/x86/sys/Makefile.inc +++ b/lib/libc/x86/sys/Makefile.inc @@ -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 |