llvm/test/Instrumentation/ThreadSanitizer/vptr_update.ll
Dmitry Vyukov 4ef1999d61 tsan: implement no_sanitize_thread attribute
If a function has no_sanitize_thread attribute,
do not instrument memory accesses in it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192871 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-17 07:20:06 +00:00

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LLVM

; RUN: opt < %s -tsan -S | FileCheck %s
; Check that vtable pointer updates are treated in a special way.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
define void @Foo(i8** nocapture %a, i8* %b) nounwind uwtable sanitize_thread {
entry:
; CHECK: call void @__tsan_vptr_update
store i8* %b, i8** %a, align 8, !tbaa !0
ret void
}
!0 = metadata !{metadata !2, metadata !2, i64 0}
!1 = metadata !{metadata !"Simple C/C++ TBAA", null}
!2 = metadata !{metadata !"vtable pointer", metadata !1}