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

[Malea, Daniel]

Hi Greg,

The test-case is still failing in the same way in r169759 (which includes your fix below) so I don't think it's the linkage_name bug that's causing it..

Thanks anyways,
Dan


On 2012-12-07, at 7:26 PM, Greg Clayton wrote:

> 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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