On Apr 8, 2014, at 2:42 PM, Eran Ifrah <[email protected]> wrote:
> I tried your suggestion:
>
> Process 17807 stopped
> * thread #1: tid = 17807, 0x00000000006666b8
> codelite`clMainFrame::OnAbout(this=0x0000000002ef0d80,
> (null)=0x00007fff2d666cd0) + 26 at frame.cpp:1791, name = 'codelite', stop
> reason = breakpoint 2.1
> frame #0: 0x00000000006666b8
> codelite`clMainFrame::OnAbout(this=0x0000000002ef0d80,
> (null)=0x00007fff2d666cd0) + 26 at frame.cpp:1791
> 1788
> 1789 void clMainFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
> 1790 {
> -> 1791 wxString mainTitle;
> 1792 mainTitle = CODELITE_VERSION_STR;
> 1793
> 1794 AboutDlg dlg(this, mainTitle);
> (lldb) image lookup --type wxClientDataContainer
Yep, so there is no actual definition for "wxClientDataContainer" in your
executable. The whole premise of the GCC changes were that the definition would
be available elsewhere, but in this case that isn't the case.
> (lldb)
>
> and ofc, attempting to inspect mainTitle, resulted in crash
>
> (lldb) p mainTitle
> error: libwx_gtk2u_unofficial_core-3.0.so.0 DWARF DIE at 0x030ac4cc for class
> 'wxSizer' has a base class 'wxClientDataContainer' that is a forward
> declaration, not a complete definition.
> Please file a bug against the compiler and include the preprocessed output
> for
> /home/david/devel/packages/wx/3.0-2/wxwidgets3.0-3.0.0/objs_gtk_sh/../src/common/sizer.cpp
> lldb: ../tools/clang/lib/AST/RecordLayoutBuilder.cpp:2844: const
> clang::ASTRecordLayout& clang::ASTContext::getASTRecordLayout(const
> clang::RecordDecl*) const: Assertion `D && "Cannot get layout of forward
> declarations!"' failed.
Yes, this is expected with the current LLDB.
> Program received signal SIGABRT, Aborted.
> Solution #2 is not an option for me, since the crash occurs in an external
> library which I did not build it myself and I am fetching it from an apt
> repository
>
> BTW, I am guessing that this won't be a problem on OSX? where everything is
> compiled with clang?
Yes, by default on darwin clang doesn't use this debug info minimizing trick.
On linux you will need to disable it if you have a clang that supports this
optimization.
This compiler optimization is really lame. It does save space, but it causes
the compiler to emit incomplete debug info. If your base class
(wxClientDataContainer) has any member variables or methods, you won't be able
to see any of the members that are missing and you won't be able to call any
wxClientDataContainer methods.
Greg
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