[lldb-dev] Does LLDB work on Ubuntu 14.04 x86_64?

[Pavel Labath via lldb-dev]

Hi,

thanks for the report. Lldb does indeed work on linux x86_64 (and
plenty more), but I think noone tests it with your given combination
of cmake flags. I've managed to reproduce your problem and fix it with
<http://reviews.llvm.org/D16293>, but please give it a go to make sure
it works for you. If all goes well, we'll get this backported to the
3.8 branch.

cheers,
pl


On 18 January 2016 at 01:54, David Jones via lldb-dev
<lldb-dev at lists.llvm.org> wrote:
> I'm trying out the release candidate(?) as follows:
>
> svn co http://llvm.org/svn/llvm-project/llvm/branches/release_38 llvm
> svn co http://llvm.org/svn/llvm-project/cfe/branches/release_38 cfe
> svn co http://llvm.org/svn/llvm-project/lldb/branches/release_38 lldb
>
> cd llvm/tools
> ln -s ../../cfe clang
> ln -s ../../lldb lldb
> cd ..
> mkdir build
> cd build
>
> cmake -DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON
> -DCMAKE_INSTALL_PREFIX=/tools/llvm/rel_38
> -DLLVM_TARGETS_TO_BUILD="X86;CppBackend" -DCMAKE_BUILD_TYPE=Release
> -DLLVM_ENABLE_ASSERTIONS=ON ..
> cmake --build . -- -j4
> sudo cmake --build . --target install
>
>
> LLVM fundamentally works: I am able to link the LLVM libraries with my
> application, and my application passes its regression tests.
>
> clang fundamentally works: it is able to compile a program.
>
> But lldb:
>
> dej at slam:~$ export LD_LIBRARY_PATH=/tools/llvm/rel_38/lib
> dej at slam:~$ export PATH=/tools/llvm/rel_38/bin:$PATH
> dej at slam:~$ lldb /bin/ls
> (lldb) target create "/bin/ls"
> Current executable set to '/bin/ls' (x86_64).
> (lldb) r
> Process 13656 launched: '/bin/ls' (x86_64)
> Segmentation fault (core dumped)
>
> dej at slam:~$ gdb lldb core
> ...
> (gdb) bt
> #0  0x00007fd9971b5671 in LLVMDisasmInstruction ()
>    from /tools/llvm/rel_38/bin/../lib/../lib/libLLVM-3.8.so
> #1  0x00007fd999e350c2 in
> AssemblyParse_x86::instruction_length(lldb_private::Address, int&) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #2  0x00007fd999e37d08 in
> AssemblyParse_x86::get_non_call_site_unwind_plan(lldb_private::UnwindPlan&)
> () from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #3  0x00007fd999e38e95 in
> UnwindAssembly_x86::GetNonCallSiteUnwindPlanFromAssembly(lldb_private::AddressRange&,
> lldb_private::Thread&, lldb_private::UnwindPlan&) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #4  0x00007fd999c8693b in
> lldb_private::FuncUnwinders::GetAssemblyUnwindPlan(lldb_private::Target&,
> lldb_private::Thread&, int) ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #5  0x00007fd999c88594 in
> lldb_private::FuncUnwinders::GetUnwindPlanAtNonCallSite(lldb_private::Target&,
> lldb_private::Thread&, int) ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #6  0x00007fd999dfb16d in
> lldb_private::RegisterContextLLDB::GetFullUnwindPlanForFrame() () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #7  0x00007fd999dfff90 in
> lldb_private::RegisterContextLLDB::InitializeZerothFrame() () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #8  0x00007fd999e01e83 in
> lldb_private::RegisterContextLLDB::RegisterContextLLDB(lldb_private::Thread&,
> std::shared_ptr<lldb_private::RegisterContextLLDB> const&,
> lldb_private::SymbolContext&, unsigned int, lldb_private::UnwindLLDB&) ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #9  0x00007fd999df5d43 in lldb_private::UnwindLLDB::AddFirstFrame() ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #10 0x00007fd999df63d0 in
> lldb_private::UnwindLLDB::DoGetFrameInfoAtIndex(unsigned int, unsigned
> long&, unsigned long&) ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #11 0x00007fd999d1049b in
> lldb_private::StackFrameList::GetFramesUpTo(unsigned int) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #12 0x00007fd999d11a23 in
> lldb_private::StackFrameList::GetFrameAtIndex(unsigned int) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #13 0x00007fd999ce4ae1 in
> lldb_private::Thread::GetStackFrameAtIndex(unsigned int) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #14 0x00007fd999cc839a in
> lldb_private::StopInfoBreakpoint::ShouldStopSynchronous(lldb_private::Event*)
> () from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #15 0x00007fd999ce75b3 in
> lldb_private::Thread::ShouldStop(lldb_private::Event*) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #16 0x00007fd999cee452 in
> lldb_private::ThreadList::ShouldStop(lldb_private::Event*) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #17 0x00007fd999cb505b in
> lldb_private::Process::ShouldBroadcastEvent(lldb_private::Event*) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #18 0x00007fd999cb5111 in
> lldb_private::Process::HandlePrivateEvent(std::shared_ptr<lldb_private::Event>&)
> ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #19 0x00007fd999cb5f73 in lldb_private::Process::RunPrivateStateThread(bool)
> ()
>    from /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #20 0x00007fd999b45d67 in
> lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) () from
> /tools/llvm/rel_38/bin/../lib/liblldb.so.3.8.0
> #21 0x00007fd9990e6182 in start_thread (arg=0x7fd990f62700)
>     at pthread_create.c:312
> #22 0x00007fd9983da47d in clone ()
>     at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
>
> Is LLDB expected to be working on Linux x64_64?
>
>
> _______________________________________________
> lldb-dev mailing list
> lldb-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
>