The branch main has been updated by arichardson:
URL:
https://cgit.FreeBSD.org/src/commit/?id=f0712132b68b4271e0602b06ee5f282718bfb8c5
commit f0712132b68b4271e0602b06ee5f282718bfb8c5
Author: Alex Richardson <arichard...@freebsd.org>
AuthorDate: 2021-08-02 08:51:01 +0000
Commit: Alex Richardson <arichard...@freebsd.org>
CommitDate: 2021-08-02 13:33:24 +0000
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
---
lib/libc/x86/sys/Makefile.inc | 8 ++++++++
1 file changed, 8 insertions(+)
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
_______________________________________________
dev-commits-src-main@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/dev-commits-src-main
To unsubscribe, send any mail to "dev-commits-src-main-unsubscr...@freebsd.org"
