https://bugs.llvm.org/show_bug.cgi?id=40062
Bug ID: 40062
Summary: lldb cannot deduce dynamic most derived type for types
with lambda type as template argument
Product: lldb
Version: unspecified
Hardware: PC
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: lldb-dev@lists.llvm.org
Reporter: e...@olofsson.info
CC: llvm-b...@lists.llvm.org
main.cpp:
struct CStoreFunctor
{
virtual ~CStoreFunctor() = default;
};
template <typename t_CFunctor>
struct TCStoreFunctor : public CStoreFunctor
{
TCStoreFunctor(t_CFunctor _fFunctor)
: m_fFunctor(_fFunctor)
{
}
t_CFunctor m_fFunctor;
};
struct CTestFunctor
{
void operator() () const
{
}
};
int main()
{
TCStoreFunctor<CTestFunctor> Test0{{}};
CStoreFunctor *pTest0 = &Test0;
auto fTest = []
{
}
;
TCStoreFunctor<decltype(fTest)> Test1{fTest};
CStoreFunctor *pTest1 = &Test1;
return 0;
}
# clang++ testdebug.cpp -g -o test -std=c++17
# lldb test
(lldb) break set --file main.cpp --line 39
(lldb) run
(lldb) p pTest0
(TCStoreFunctor<CTestFunctor> *) $0 = 0x00007ffeefbff7a8
(lldb) p pTest1
(CStoreFunctor *) $1 = 0x00007ffeefbff780
I tracked this down to ItaniumABILanguageRuntime::GetTypeInfoFromVTableAddress
where the type name is:
0x00007ffeefbff780: static-type = 'CStoreFunctor *' has vtable symbol 'vtable
for TCStoreFunctor<main::$_0>'
It's then using this name 'TCStoreFunctor<main::$_0>' to lookup the type with
FindTypes. The problem is that the dwarf info has another name for
this type:
(lldb) script
>>> for type in lldb.target.GetModuleAtIndex(0).GetTypes():
... print type.GetName()
...
TCStoreFunctor<(lambda at main.cpp:31:15)>
TCStoreFunctor<(anonymous class)> *
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