598124296b
Classes with no virtual methods or whose virtual methods were all inherited from virtual bases don't have a vfptr at offset zero. We were crashing attempting to get the layout of that non-existent vftable. We don't need any vshape info in this case because the debugger can infer it from the base class information. The current class may not introduce any virtual methods if we are in this situation. llvm-svn: 280287
55 lines
2.2 KiB
C++
55 lines
2.2 KiB
C++
// RUN: %clang_cc1 %s -triple=i686-pc-windows-msvc -debug-info-kind=limited -gcodeview -emit-llvm -o - | FileCheck %s
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// Tests virtual bases in the MS ABI.
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struct POD { int pod; };
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struct DynamicNoVFPtr : virtual POD { };
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DynamicNoVFPtr dynamic_no_vfptr;
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// CHECK: ![[DynamicNoVFPtr:[0-9]+]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "DynamicNoVFPtr",
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// CHECK-SAME: elements: ![[elements:[0-9]+]]
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// CHECK: ![[elements]] = !{![[POD_base:[0-9]+]]}
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// CHECK: ![[POD_base]] = !DIDerivedType(tag: DW_TAG_inheritance, scope: ![[DynamicNoVFPtr]],
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// CHECK-SAME: baseType: ![[POD:[0-9]+]], offset: 4, flags: DIFlagVirtual)
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// CHECK: ![[POD]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "POD"
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struct HasVirtualMethod { virtual void f(); };
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struct NoPrimaryBase : virtual HasVirtualMethod { };
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NoPrimaryBase no_primary_base;
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// CHECK: ![[NoPrimaryBase:[0-9]+]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "NoPrimaryBase",
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// CHECK-SAME: elements: ![[elements:[0-9]+]]
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// CHECK: ![[elements]] = !{![[NoPrimaryBase_base:[0-9]+]]}
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// CHECK: ![[NoPrimaryBase_base]] = !DIDerivedType(tag: DW_TAG_inheritance, scope: ![[NoPrimaryBase]],
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// CHECK-SAME: baseType: ![[HasVirtualMethod:[0-9]+]], offset: 4, flags: DIFlagVirtual)
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// CHECK: ![[HasVirtualMethod]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "HasVirtualMethod"
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struct SecondaryVTable { virtual void g(); };
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struct HasPrimaryBase : virtual SecondaryVTable, HasVirtualMethod { };
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HasPrimaryBase has_primary_base;
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// CHECK: ![[HasPrimaryBase:[0-9]+]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "HasPrimaryBase",
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// CHECK-SAME: elements: ![[elements:[0-9]+]]
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// CHECK: ![[elements]] = !{![[SecondaryVTable_base:[0-9]+]], ![[HasVirtualMethod_base:[0-9]+]], ![[vshape:[0-9]+]]}
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// CHECK: ![[SecondaryVTable_base]] = !DIDerivedType(tag: DW_TAG_inheritance, scope: ![[HasPrimaryBase]],
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// CHECK-SAME: baseType: ![[SecondaryVTable:[0-9]+]], offset: 4, flags: DIFlagVirtual)
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// CHECK: ![[SecondaryVTable]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "SecondaryVTable"
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// CHECK: ![[HasVirtualMethod_base]] = !DIDerivedType(tag: DW_TAG_inheritance, scope: ![[HasPrimaryBase]], baseType: ![[HasVirtualMethod]])
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