https://llvm.org/bugs/show_bug.cgi?id=23549
Bug ID: 23549
Summary: [MS ABI] Clang doesn't generate local vftables with
dllimport
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
consider:
struct _declspec(dllimport) A {
A()
virtual ~A();
};
A *f() { return new A();}
MSVC generates:
This calls 'operator new' and the imported A constructor. However, it also
overwrites the VFPtr with a so-called "local vftable". I suspect this is to
support overriding the global operator new and delete.
More information is available here:
https://groups.google.com/d/msg/microsoft.public.vc.language/atSh_2VSc2w/EgJ3r_7OzVUJ
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