[lldb-dev] [Bug 31464] New: lldb 3.9 no longer opens Breakpad generated dumps

[via lldb-dev]

https://llvm.org/bugs/show_bug.cgi?id=31464

            Bug ID: 31464
           Summary: lldb 3.9 no longer opens Breakpad generated dumps
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: rdorr at microsoft.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17780
  --> https://llvm.org/bugs/attachment.cgi?id=17780&action=edit
Zip file containing a core file generated from breakpad

•    Opens with all versions of gdb
•    Opens with lldb 3.7
•    Fails to open with lldb 3.9

#0  0x00007ffff4e40120 in lldb_private::ArchSpec::GetMachine() const () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1  - rdi is 0x8 and
can’t be dereferenced 
#1  0x00007ffff53a71bf in
RegisterContextPOSIX_x86::RegisterContextPOSIX_x86(lldb_private::Thread&,
unsigned int, lldb_private::RegisterInfoInterface*) ()
   from /home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#2  0x00007ffff52695f4 in
RegisterContextCorePOSIX_x86_64::RegisterContextCorePOSIX_x86_64(lldb_private::Thread&,
lldb_private::RegisterInfoInterface*, lldb_private::DataExtractor const&,
lldb_private::DataExtractor const&) () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#3  0x00007ffff526775f in
ThreadElfCore::CreateRegisterContextForFrame(lldb_private::StackFrame*) () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#4  0x00007ffff52672c5 in ThreadElfCore::GetRegisterContext() [clone
.localalias.37] () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#5  0x00007ffff5010dd9 in lldb_private::Thread::SetupForResume() () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#6  0x00007ffff501653c in lldb_private::ThreadList::WillResume() () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#7  0x00007ffff4fd0f4f in lldb_private::Process::PrivateResume() () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#8  0x00007ffff4fd174f in
lldb_private::Process::ProcessEventData::DoOnRemoval(lldb_private::Event*) ()
from /home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#9  0x00007ffff4e86209 in
lldb_private::Listener::FindNextEventInternal(lldb_private::Mutex::Locker&,
lldb_private::Broadcaster*, lldb_private::ConstString const*, unsigned int,
unsigned int, std::shared_ptr<lldb_private::Event>&, bool) () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#10 0x00007ffff4e86951 in
lldb_private::Listener::WaitForEventsInternal(lldb_private::TimeValue const*,
lldb_private::Broadcaster*, lldb_private::ConstString const*, unsigned int,
unsigned int, std::shared_ptr<lldb_private::Event>&) () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#11 0x00007ffff4e86a44 in
lldb_private::Listener::WaitForEvent(lldb_private::TimeValue const*,
std::shared_ptr<lldb_private::Event>&) ()
   from /home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#12 0x00007ffff4fd0d17 in lldb_private::Process::LoadCore() () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#13 0x00007ffff3f0ccdf in lldb::SBTarget::LoadCore(char const*) () from
/home/rdorr/eugene/llvm-3.9-Release/lib/liblldb.so.3.9.1
#14 0x0000000000418864 in LldbHandler::LoadCore (this=0x7fffffffca88,
target=0x7fffffffe7ad "/home/rdorr/Source/mspal/Hosts/Linux/output/bin/palrun",
    core=0x69f6f0 "/home/rdorr/Temp/test.core", libPath=0x7fffffffe061 "") at
debugger/LldbHandler.cpp:366
#15 0x00000000004687cd in LiveUserDebugServices::LoadCore (this=0x7fffffffca48,
target=0x7fffffffe7ad "/home/rdorr/Source/mspal/Hosts/Linux/output/bin/palrun",
    core=0x69f6f0 "/home/rdorr/Temp/test.core", libPath=0x7fffffffe061 "") at
main/dbgsvc.cpp:143
#16 0x000000000046ce40 in main (argc=4, argv=0x7fffffffe518) at
main/main.cpp:313

•    Using readelf, I can see the PR_STATUS for the thread in question and has
register and other information.
•    Opening in gdb I can symbolize the stacks and do other operations.

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