derek.holloway
7502bf64a4
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54 lines
2.4 KiB
C++
54 lines
2.4 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -fsanitize=cfi-mfcall -o - %s -fvisibility=hidden | FileCheck %s
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#define CFI_UNCHECKED_CALLEE __attribute__((cfi_unchecked_callee))
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class A {};
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// CHECK-LABEL: _Z14MemberFuncCallP1AMS_FvvE
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void MemberFuncCall(A *s, void (A::*p)()) {
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// CHECK: memptr.virtual:
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// CHECK-NEXT: [[VTABLE:%.*]] = load ptr, ptr {{.*}}, align 8
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// CHECK-NEXT: [[OFFSET:%.*]] = sub i64 %memptr.ptr, 1
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// CHECK-NEXT: [[FUNC:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 [[OFFSET]]
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// CHECK-NEXT: [[VALID:%.*]] = call i1 @llvm.type.test(ptr [[FUNC]], metadata !"_ZTSM1AFvvE.virtual")
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// CHECK-NEXT: [[FUNC:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 [[OFFSET]]
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// CHECK-NEXT: %memptr.virtualfn = load ptr, ptr [[FUNC]], align 8
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// CHECK-NEXT: {{.*}}= call i1 @llvm.type.test(ptr [[VTABLE]], metadata !"all-vtables")
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// CHECK-NEXT: br i1 [[VALID]], label %[[CONT:.*]], label %handler.cfi_check_fail{{.*}}
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// CHECK: [[CONT]]:
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// CHECK-NEXT: br label %memptr.end
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// CHECK: memptr.nonvirtual:
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// CHECK-NEXT: %memptr.nonvirtualfn = inttoptr i64 %memptr.ptr to ptr
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// CHECK-NEXT: [[VALID:%.*]] = call i1 @llvm.type.test(ptr %memptr.nonvirtualfn, metadata !"_ZTSM1AFvvE")
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// CHECK-NEXT: [[VALID2:%.*]] = or i1 false, [[VALID]]
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// CHECK-NEXT: br i1 [[VALID2]], label %[[CONT2:.*]], label %handler.cfi_check_fail{{.*}}
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// CHECK: [[CONT2]]:
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// CHECK-NEXT: br label %memptr.end
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// CHECK: memptr.end:
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// CHECK-NEXT: {{.*}} = phi ptr [ %memptr.virtualfn, %[[CONT]] ], [ %memptr.nonvirtualfn, %[[CONT2]] ]
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(s->*p)();
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}
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// CHECK-LABEL: _Z19MemberFuncCallNoCFIP1AMS_FvvE
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// CHECK-NOT: llvm.type.test
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void MemberFuncCallNoCFI(A *s, void (CFI_UNCHECKED_CALLEE A::*p)()) {
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// CHECK: memptr.virtual:
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// CHECK-NEXT: [[VTABLE:%.*]] = load ptr, ptr {{.*}}, align 8
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// CHECK-NEXT: [[OFFSET:%.*]] = sub i64 %memptr.ptr, 1
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// CHECK-NEXT: [[FUNC:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 [[OFFSET]]
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// CHECK-NEXT: %memptr.virtualfn = load ptr, ptr [[FUNC]], align 8
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// CHECK-NEXT: br label %memptr.end
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// CHECK: memptr.nonvirtual:
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// CHECK-NEXT: %memptr.nonvirtualfn = inttoptr i64 %memptr.ptr to ptr
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// CHECK-NEXT: br label %memptr.end
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// CHECK: memptr.end:
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// CHECK-NEXT: {{.*}} = phi ptr [ %memptr.virtualfn, %memptr.virtual ], [ %memptr.nonvirtualfn, %memptr.nonvirtual ]
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(s->*p)();
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}
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