http://llvm.org/bugs/show_bug.cgi?id=21074
Bug ID: 21074
Summary: MS ABI: wrong vftables with RTTI + virtual
inheritance/functions
Product: clang
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
consider:
struct __declspec(dllexport) ClassName0 {};
struct __declspec(dllexport) ClassName1 {
virtual void f();
};
struct __declspec(dllexport) ClassName2 : virtual ClassName0 {
virtual void g();
ClassName2() {}
};
struct __declspec(dllexport) ClassName3 : virtual ClassName2,
virtual ClassName0,
virtual ClassName1 {
virtual void h();
};
struct __declspec(dllexport) ClassName4 : virtual ClassName2,
virtual ClassName0,
virtual ClassName3 {};
--- different.cpp_clang.obj.dump 2014-09-25 23:12:17.192451100 -0700
+++ different.cpp_vs.obj.dump 2014-09-25 23:12:17.238455700 -0700
@@ -5,12 +5,15 @@
const ClassName3::`vftable'{for `ClassName3'}[0]: const ClassName3::`RTTI
Complete Object Locator'{for `ClassName3'}
const ClassName3::`vftable'{for `ClassName3'}[4]: public: virtual void
__thiscall ClassName3::h(void)
const ClassName3::`vftable'{for `ClassName1'}[0]: const ClassName3::`RTTI
Complete Object Locator'{for `ClassName1'}
+const ClassName3::`vftable'{for `ClassName1'}[4]: public: virtual void
__thiscall ClassName1::f(void)
const ClassName3::`vftable'{for `ClassName2'}[0]: const ClassName3::`RTTI
Complete Object Locator'{for `ClassName2'}
const ClassName3::`vftable'{for `ClassName2'}[4]: public: virtual void
__thiscall ClassName2::g(void)
const ClassName4::`vftable'[0]: const ClassName4::`RTTI Complete Object
Locator'
const ClassName4::`vftable'[4]: public: virtual void __thiscall
ClassName2::g(void)
const ClassName4::`vftable'{for `ClassName1'}[0]: const ClassName4::`RTTI
Complete Object Locator'{for `ClassName1'}
+const ClassName4::`vftable'{for `ClassName1'}[4]: public: virtual void
__thiscall ClassName1::f(void)
const ClassName4::`vftable'{for `ClassName3'}[0]: const ClassName4::`RTTI
Complete Object Locator'{for `ClassName3'}
+const ClassName4::`vftable'{for `ClassName3'}[4]: public: virtual void
__thiscall ClassName3::h(void)
const ClassName2::`vbtable'[0]: -4
const ClassName2::`vbtable'[4]: 4
const ClassName3::`vbtable'{for `ClassName3'}[0]: -4
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