[lldb-dev] [Bug 14540] New: Backtrace command does not display c++ member function names on Linux

[Greg Clayton]

Daniel,

This bug might be because the linux compiler is using DW_AT_linkage_name instead of the old DW_AT_MIPS_linkage_name that our compiler uses. I just submitted this fix:

% svn commit
Sending        source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
Sending        source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
Sending        source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
Sending        source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
Transmitting file data ....
Committed revision 169657.

Let me know if that fixes the bug.

Greg Clayton

On Dec 7, 2012, at 2:41 PM, bugzilla-daemon at llvm.org wrote:

> http://llvm.org/bugs/show_bug.cgi?id=14540
> 
>             Bug #: 14540
>           Summary: Backtrace command does not display c++ member function
>                    names on Linux
>           Product: lldb
>           Version: unspecified
>          Platform: PC
>        OS/Version: Linux
>            Status: NEW
>          Severity: enhancement
>          Priority: P
>         Component: All Bugs
>        AssignedTo: lldb-dev at cs.uiuc.edu
>        ReportedBy: daniel.malea at intel.com
>    Classification: Unclassified
> 
> 
> Doing a backtrace during a c++ program sometimes does not display the names of
> member functions correctly.
> 
> For example, on Linux, lldb reports:
> 
> frame #0: 0x0000000000400a72 a.out`C + 50 at main.cpp:93
> frame #1: 0x00000000004008f7 a.out`C + 39 at main.cpp:94
> frame #2: 0x0000000000400727 a.out`main + 87 at main.cpp:121
> frame #3: 0x00007f04ab6b676d libc.so.6`__libc_start_main + 237
> frame #4: 0x0000000000400609 a.out`_start + 41
> 
> The name of C's constructor "C::C" is not displayed in any frame.
> 
> To reproduce the above, build lldb (with clang) and run:
> 
> ./dotest.py -A x86_64 -C /home/pulse_agent/bin/clang -v -t -f
> IterateFrameAndDisassembleTestCase.test_with_dwarf_and_python_api
> 
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