This crash is due to the name demangler. We recently inlined the demangling code into LLDB for Xcode builds because the libc++abi.dylib on the system had this crashing bug. If you download and build top of tree LLDB and debug using that and it still crashes, we need to know the mangled name that causing the demangler to crash.
So, if you can go to frame #6 in your example below and type "frame variable" you will see the mangled name that is causing this to crash. Let us know if top of tree is still crashing and if so, please send us the mangled name that is causing the crash. Greg On Nov 8, 2013, at 3:15 AM, Tom Miles <[email protected]> wrote: > Hi There, > > Firstly I apologise if this the incorrect forum for something like this, but > it’s a kind of “you’re my only hope” type situation. I am currently in the > process of porting a 2.5 million line pc code base to OSX and after a year of > compiler wrangling and team coding standards changes I’m pretty much there. > However, we have had to keep upgrading XCode due to the support of C++11 > being slow in coming. However, now with XCode 5 we have all the features we > need, there is one small problem though, XCode crashes when trying to debug > our code. I eventually traced this to the fact that the lldb that ships with > XCode5 crashes when trying to attach to the exe. I found this out by running > lldb against our exe from the command line. I then tried downloading the > latest lldb from svn and building it, which yielded a version that would > attach to the exe and run it, but would crash in a very similar way when > trying to perform any debugging operations, such as a backtrace. As a last > ditch effort I tried debugging lldb debugging our exe (fun times), and got > the following output and call stack. > > If anyone could shed some light on it, then it would be great. I’m afraid > that I am unable to provide reproduction methods, due to the size and > proprietary nature of the code base, I am happy to provide any additional > information that may be required though. > > (lldb) bt > lldb(7515,0x7fff7b4b2180) malloc: *** error for object 0x104186080: incorrect > checksum for freed object - object was probably modified after being freed. > *** set a breakpoint in malloc_error_break to debug > Process 7515 stopped > * thread #1: tid = 0x3b1be, 0x00007fff8f873212 > libsystem_kernel.dylib`__pthread_kill + 10, name = > '<lldb.driver.main-thread>', queue = 'com.apple.main-thread', stop reason = > signal SIGABRT > frame #0: 0x00007fff8f873212 libsystem_kernel.dylib`__pthread_kill + 10 > libsystem_kernel.dylib`__pthread_kill + 10: > -> 0x7fff8f873212: jae 0x7fff8f873219 ; __pthread_kill + 17 > 0x7fff8f873214: jmpq 0x7fff8f8744d4 ; cerror_nocancel > 0x7fff8f873219: ret > 0x7fff8f87321a: nop > (lldb) bt > * thread #1: tid = 0x3b1be, 0x00007fff8f873212 > libsystem_kernel.dylib`__pthread_kill + 10, name = > '<lldb.driver.main-thread>', queue = 'com.apple.main-thread', stop reason = > signal SIGABRT > * frame #0: 0x00007fff8f873212 libsystem_kernel.dylib`__pthread_kill + 10 > frame #1: 0x00007fff914d9b24 libsystem_c.dylib`pthread_kill + 90 > frame #2: 0x00007fff9151df61 libsystem_c.dylib`abort + 143 > frame #3: 0x00007fff914f98d5 libsystem_c.dylib`szone_error + 580 > frame #4: 0x00007fff914f7628 libsystem_c.dylib`szone_free_definite_size + > 1535 > frame #5: 0x00007fff914f18c8 libsystem_c.dylib`free + 199 > frame #6: 0x000000010160ec52 > LLDB`lldb_private::Mangled::GetDemangledName(this=0x000000013833e2f8) const + > 322 at Mangled.cpp:214 > frame #7: 0x0000000101a38ece > LLDB`lldb_private::Symtab::InitNameIndexes(this=0x000000010450a990) + 894 at > Symtab.cpp:317 > frame #8: 0x0000000101a3da78 > LLDB`lldb_private::Symtab::FindAllSymbolsWithNameAndType(this=0x000000010450a990, > name=0x00007fff5fbf1c78, symbol_type=eSymbolTypeObjCClass, > symbol_indexes=0x00007fff5fbf1330) + 120 at Symtab.cpp:791 > frame #9: 0x000000010161a9ab > LLDB`lldb_private::Module::FindSymbolsWithNameAndType(this=0x0000000104500b70, > name=0x00007fff5fbf1c78, symbol_type=eSymbolTypeObjCClass, > sc_list=0x00007fff5fbf17b0) + 443 at Module.cpp:1316 > frame #10: 0x00000001016240f5 > LLDB`lldb_private::ModuleList::FindSymbolsWithNameAndType(this=0x0000000105800188, > name=0x00007fff5fbf1c78, symbol_type=eSymbolTypeObjCClass, > sc_list=0x00007fff5fbf17b0, append=false) const + 597 at ModuleList.cpp:528 > frame #11: 0x0000000101a96a90 > LLDB`lldb_private::ObjCLanguageRuntime::LookupInCompleteClassCache(this=0x000000013227feb0, > name=0x00007fff5fbf1c78) + 1456 at ObjCLanguageRuntime.cpp:101 > frame #12: 0x0000000101692b83 > LLDB`lldb_private::ValueObject::MaybeCalculateCompleteType(this=0x0000000132a334b0) > + 755 at ValueObject.cpp:328 > frame #13: 0x0000000101692eb0 > LLDB`lldb_private::ValueObject::GetClangType(this=0x0000000132a334b0) + 32 at > ValueObject.cpp:359 > frame #14: 0x0000000101dffae2 > LLDB`lldb_private::FormatNavigator<lldb_private::ConstString, > lldb_private::TypeFormatImpl>::Get(this=0x000000012f663200, > valobj=0x0000000132a334b0, entry=0x00007fff5fbf20c0, > use_dynamic=eNoDynamicValues, why=0x00007fff5fbf2114) + 98 at > FormatNavigator.h:291 > frame #15: 0x0000000101dfc583 > LLDB`lldb_private::TypeCategoryImpl::Get(this=0x000000012f663110, > valobj=0x0000000132a334b0, entry=0x00007fff5fbf20c0, > use_dynamic=eNoDynamicValues, reason=0x00007fff5fbf2114) + 115 at > TypeCategory.cpp:48 > frame #16: 0x0000000101e1f27f > LLDB`lldb_private::TypeCategoryMap::GetFormat(this=0x000000010277e230, > valobj=0x0000000132a334b0, use_dynamic=eNoDynamicValues) + 863 at > TypeCategoryMap.cpp:196 > frame #17: 0x0000000101de6921 > LLDB`lldb_private::FormatManager::GetFormat(this=0x000000010277e148, > valobj=0x0000000132a334b0, use_dynamic=eNoDynamicValues) + 753 at > FormatManager.cpp:447 > frame #18: 0x0000000101ddee72 > LLDB`lldb_private::DataVisualization::GetFormat(valobj=0x0000000132a334b0, > use_dynamic=eNoDynamicValues) + 50 at DataVisualization.cpp:52 > frame #19: 0x0000000101691bb1 > LLDB`lldb_private::ValueObject::UpdateFormatsIfNeeded(this=0x0000000132a334b0) > + 193 at ValueObject.cpp:248 > frame #20: 0x000000010169164b > LLDB`lldb_private::ValueObject::UpdateValueIfNeeded(this=0x0000000132a334b0, > update_format=true) + 75 at ValueObject.cpp:168 > frame #21: 0x000000010169aefa > LLDB`lldb_private::ValueObject::GetValueAsCString(this=0x0000000132a334b0) + > 42 at ValueObject.cpp:1470 > frame #22: 0x00000001015cfd2e > LLDB`FormatPromptRecurse(format=0x0000000132a31f8c, sc=0x0000000132a31cb0, > exe_ctx=0x00007fff5fbf7b78, addr=0x0000000000000000, s=0x00007fff5fbf5670, > end=0x00007fff5fbf56b0, valobj=0x0000000000000000) + 21006 at > Debugger.cpp:2285 > frame #23: 0x00000001015caceb > LLDB`FormatPromptRecurse(format=0x0000000132a31f73, sc=0x0000000132a31cb0, > exe_ctx=0x00007fff5fbf7b78, addr=0x0000000000000000, s=0x00007fff5fbf7090, > end=0x00007fff5fbf70d0, valobj=0x0000000000000000) + 459 at Debugger.cpp:1526 > frame #24: 0x00000001015caceb > LLDB`FormatPromptRecurse(format=0x0000000132a31f50, sc=0x0000000132a31cb0, > exe_ctx=0x00007fff5fbf7b78, addr=0x0000000000000000, s=0x00007fff5fbf7b28, > end=0x0000000000000000, valobj=0x0000000000000000) + 459 at Debugger.cpp:1526 > frame #25: 0x00000001015caac1 > LLDB`lldb_private::Debugger::FormatPrompt(format=0x0000000132a31f50, > sc=0x0000000132a31cb0, exe_ctx=0x00007fff5fbf7b78, addr=0x0000000000000000, > s=0x00007fff5fbf7b28, valobj=0x0000000000000000) + 641 at Debugger.cpp:2622 > frame #26: 0x0000000101afb7ef > LLDB`lldb_private::StackFrame::DumpUsingSettingsFormat(this=0x0000000132a31c40, > strm=0x00000001034b94e0, frame_marker=0x00007fff5fbf7e71) + 495 at > StackFrame.cpp:1294 > frame #27: 0x0000000101afca1c > LLDB`lldb_private::StackFrame::GetStatus(this=0x0000000132a31c40, > strm=0x00000001034b94e0, show_frame_info=true, show_source=false, > frame_marker=0x00007fff5fbf7e71) + 108 at StackFrame.cpp:1384 > frame #28: 0x0000000101b05641 > LLDB`lldb_private::StackFrameList::GetStatus(this=0x000000012f658eb0, > strm=0x00000001034b94e0, first_frame=0, num_frames=4294967295, > show_frame_info=true, num_frames_with_source=0, > selected_frame_marker=0x00000001020d5fd4) + 2929 at StackFrameList.cpp:909 > frame #29: 0x0000000101b534be > LLDB`lldb_private::Thread::GetStatus(this=0x000000010422b620, > strm=0x00000001034b94e0, start_frame=0, num_frames=4294967295, > num_frames_with_source=0) + 1582 at Thread.cpp:1970 > frame #30: 0x000000010157c9de > LLDB`CommandObjectThreadBacktrace::DoExecute(this=0x0000000103425690, > command=0x00007fff5fbf89a0, result=0x00000001034b94e0) + 190 at > CommandObjectThread.cpp:175 > frame #31: 0x00000001017f26fb > LLDB`lldb_private::CommandObjectParsed::Execute(this=0x0000000103425690, > args_string=0x00007fff5fbf9309, result=0x00000001034b94e0) + 715 at > CommandObject.cpp:1037 > frame #32: 0x00000001017cbbc4 > LLDB`lldb_private::CommandInterpreter::HandleCommand(this=0x00000001034112b0, > command_line=0x00007fff5fbfafb1, lazy_add_to_history=eLazyBoolCalculate, > result=0x00000001034b94e0, override_context=0x0000000000000000, > repeat_on_empty_command=true, no_context_switching=true) + 21492 at > CommandInterpreter.cpp:1850 > frame #33: 0x00000001017f99d8 > LLDB`lldb_private::CommandObjectRegexCommand::DoExecute(this=0x00000001034394f0, > command=0x00007fff5fbfbe89, result=0x00000001034b94e0) + 2984 at > CommandObjectRegexCommand.cpp:89 > frame #34: 0x00000001017f2a95 > LLDB`lldb_private::CommandObjectRaw::Execute(this=0x00000001034394f0, > args_string=0x00007fff5fbfbe89, result=0x00000001034b94e0) + 789 at > CommandObject.cpp:1063 > frame #35: 0x00000001017cbbc4 > LLDB`lldb_private::CommandInterpreter::HandleCommand(this=0x00000001034112b0, > command_line=0x000000010425a7b9, lazy_add_to_history=eLazyBoolYes, > result=0x00000001034b94e0, override_context=0x0000000000000000, > repeat_on_empty_command=true, no_context_switching=false) + 21492 at > CommandInterpreter.cpp:1850 > frame #36: 0x00000001000d1754 > LLDB`lldb::SBCommandInterpreter::HandleCommand(this=0x00007fff5fbfdb20, > command_line=0x000000010425a7b9, result=0x00007fff5fbfdb28, > add_to_history=true) + 292 at SBCommandInterpreter.cpp:122 > frame #37: 0x0000000100008e47 > lldb`Driver::HandleIOEvent(this=0x00007fff5fbff9a0, event=0x00007fff5fbfe060) > + 183 at Driver.cpp:1171 > frame #38: 0x000000010000be68 > lldb`Driver::MainLoop(this=0x00007fff5fbff9a0) + 10184 at Driver.cpp:1629 > frame #39: 0x000000010000c923 lldb`main(argc=1, argv=0x00007fff5fbffb18, > envp=0x00007fff5fbffb28) + 467 at Driver.cpp:1802 > frame #40: 0x0000000100001044 lldb`start + 52 > This email is sent by The Creative Assembly Limited company No. 03425917, > registered in England & Wales registered office 27 Great West Road, > Middlesex, TW8 9BW, England. The contents of this e-mail and any attachments > are confidential to the intended recipient and may also be legally > privileged. Unless you are the named addressee (or authorised to receive for > the addressee) of this email you may not copy, disclose or distribute it to > anyone else. If you have received this email in error, please notify us > immediately by e-mail on [email protected] and then delete > the email and any copies. The Creative Assembly Limited have made all > reasonable efforts to ensure that this e-mail and any attached documents or > software are free from software viruses, but it is the recipient's > responsibility to confirm this. > _______________________________________________ > lldb-dev mailing list > [email protected] > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev _______________________________________________ lldb-dev mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
