[lldb-dev] LLDB /w Windows and MinGW64
Eran Ifrah via lldb-dev
lldb-dev at lists.llvm.org
Sun Apr 3 10:21:38 PDT 2016
I managed to "launch" the process - but it crashes immediately.
This happens both with lldb.exe and with my GUI interface
See http://pastebin.com/9ep130EQ for detailed backtrace
Thanks
On Fri, Apr 1, 2016 at 6:31 AM, Zachary Turner <zturner at google.com> wrote:
> I will have another look tomorrow.
>
> On Thu, Mar 31, 2016 at 11:56 AM Eran Ifrah <eran.ifrah at gmail.com> wrote:
>
>> Ping...
>>
>> On Mon, Mar 28, 2016 at 10:19 PM, Eran Ifrah <eran.ifrah at gmail.com>
>> wrote:
>>
>>> Sorry, the current status is that lldb-server is no longer needed,
>>> however the debuggee process hangs and the lldb.exe is "froze" (i.e. it
>>> does not accept user input)
>>>
>>> Here is the backtrace: http://pastebin.com/mbLFgCA6
>>> I will try and get lldb built in debug mode for better debugging... but
>>> this will take sometime as the generated files are too large to written to
>>> the file system - (clang sources)
>>>
>>> I will teak the CMakeLists.txt files to fix this and will report back
>>> In the meantime, if you have any more hints/tips - I will be happy to
>>> try them here
>>>
>>>
>>> Thanks
>>>
>>>
>>>
>>> On Mon, Mar 28, 2016 at 10:13 PM, Eran Ifrah <eran.ifrah at gmail.com>
>>> wrote:
>>>
>>>> I was able to locate the problematic
>>>> code: ProcessWindowsLive::Initialize() was not called due to wrong macros
>>>> http://reviews.llvm.org/D18520
>>>>
>>>>
>>>> On Mon, Mar 28, 2016 at 9:31 PM, Eran Ifrah <eran.ifrah at gmail.com>
>>>> wrote:
>>>>
>>>>> Done.
>>>>>
>>>>> http://reviews.llvm.org/D18519
>>>>>
>>>>>
>>>>> On Mon, Mar 28, 2016 at 9:28 PM, Zachary Turner <zturner at google.com>
>>>>> wrote:
>>>>>
>>>>>> Almost, there's one more step. Click Create a New Revision on that
>>>>>> screen, then give it a title and a description. For reviewers put zturner,
>>>>>> and for subscribers put lldb-commits
>>>>>>
>>>>>> On Mon, Mar 28, 2016 at 11:20 AM Eran Ifrah <eran.ifrah at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Is this what you meant:
>>>>>>> http://reviews.llvm.org/differential/diff/51809/
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>> On Mon, Mar 28, 2016 at 8:58 PM, Zachary Turner <zturner at google.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> For the patch, can you create an account on reviews.llvm.org, and
>>>>>>>> upload your patch there? This makes interactive reviewing / commenting
>>>>>>>> much easier. Let me know if you need help getting that set up.
>>>>>>>>
>>>>>>>> On Mon, Mar 28, 2016 at 10:58 AM Zachary Turner <zturner at google.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> If you compile with MSVC or Clang-cl it wouldn't ask for
>>>>>>>>> lldb-server. So most likely there is some code that is using #if
>>>>>>>>> defined(_MSC_VER) when it should be using #if defined(LLVM_ON_WINDOWS).
>>>>>>>>>
>>>>>>>>> You'll have to hunt that down, but a good starting point might be
>>>>>>>>> to put a breakpoint in ProcessWindowsLive::CreateInstance and then work
>>>>>>>>> backwards to see why that isn't getting called (assuming it's not).
>>>>>>>>>
>>>>>>>>> On Mon, Mar 28, 2016 at 9:05 AM Eran Ifrah <eran.ifrah at gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> On Mon, Mar 28, 2016 at 6:56 PM, Zachary Turner <
>>>>>>>>>> zturner at google.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> Patches welcome. If you can split it into independent pieces
>>>>>>>>>>> that would be helpful, but it's not always possible.
>>>>>>>>>>>
>>>>>>>>>>> Patch is attached, I think you will find it quite straight
>>>>>>>>>> forward - feel free to comment and send it back for revise
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> The NativeProcessProtocol error, that's the interface that
>>>>>>>>>>> converts debugging events that occur on the inferior into packets that can
>>>>>>>>>>> be sent to the server, and vice versa. Since Windows doesn't currently use
>>>>>>>>>>> lldb server, this piece has never been written for Windows
>>>>>>>>>>
>>>>>>>>>> So this raises the question: how come lldb asks for it? (see my
>>>>>>>>>> first emai inl this conversation)
>>>>>>>>>> I would have build LLDB in debug mode, but it seems that MinGW
>>>>>>>>>> as.exe fails to write some of the files "File too big"
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Mon, Mar 28, 2016 at 8:41 AM Eran Ifrah <eran.ifrah at gmail.com>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> On Mon, Mar 28, 2016 at 6:10 PM, Zachary Turner <
>>>>>>>>>>>> zturner at google.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> I'm the main Windows maintainer,
>>>>>>>>>>>>
>>>>>>>>>>>> Hi
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> and while We've gotten things working pretty well on Windows,
>>>>>>>>>>>>> our effort has been 100% on building with msvc and/or clang-cl. Building
>>>>>>>>>>>>> with mingw has a different set of pre processor defines and some other
>>>>>>>>>>>>> subtle differences, so it doesn't surprise me that things don't work quite
>>>>>>>>>>>>> right.
>>>>>>>>>>>>>
>>>>>>>>>>>>> I got it to compile (I have a big patch that I can send you
>>>>>>>>>>>> if you are interested)
>>>>>>>>>>>> mainly involves blocking code under __MINGW32__ and some
>>>>>>>>>>>> updates to the various CMakeLists.txt and AddLLDB.cmake module files
>>>>>>>>>>>> Some functions are missing in MinGW implementations (like
>>>>>>>>>>>> gets_s and others :/)
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> You can try getting lldb-server to build and run under
>>>>>>>>>>>>> Windows, or you can try to get it to use the non lldb server codepath on
>>>>>>>>>>>>> MinGW, but you may still run into some
>>>>>>>>>>>>
>>>>>>>>>>>> I got lldb-server to compile and run on Windows, however, it
>>>>>>>>>>>> crashes immediately and the backtrace shows this:
>>>>>>>>>>>>
>>>>>>>>>>>> 0 0x0000000000724615
>>>>>>>>>>>> lldb_private::NativeProcessProtocol::Launch(lldb_private::ProcessLaunchInfo&,
>>>>>>>>>>>> lldb_private::NativeProcessProtocol::NativeDelegate&,
>>>>>>>>>>>> lldb_private::MainLoopBase&,
>>>>>>>>>>>> std::shared_ptr<lldb_private::NativeProcessProtocol>&)
>>>>>>>>>>>> 1 0x00000000005f815d
>>>>>>>>>>>> lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS::LaunchProcess()
>>>>>>>>>>>>
>>>>>>>>>>>> 2 0x00000000004020e5
>>>>>>>>>>>> handle_launch(lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS&,
>>>>>>>>>>>> int, char const* const*)
>>>>>>>>>>>> 3 0x000000000040335e main_gdbserver(int, char**)
>>>>>>>>>>>> 4 0x000000000188329c main
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I had to #ifndef __MINGW32__ around lldb-platform.cpp as it
>>>>>>>>>>>> contains too much Linux code that can not be compiled under Windows (fork,
>>>>>>>>>>>> exec*)
>>>>>>>>>>>> and basically lldb-server calls the main_gdbserver instead of
>>>>>>>>>>>> main_platform function
>>>>>>>>>>>>
>>>>>>>>>>>> Looking at the function that crashes, I see this:
>>>>>>>>>>>>
>>>>>>>>>>>> llvm_unreachable("Platform has no NativeProcessProtocol
>>>>>>>>>>>> support");
>>>>>>>>>>>>
>>>>>>>>>>>> Any ideas?
>>>>>>>>>>>> Thanks!
>>>>>>>>>>>>
>>>>>>>>>>>> issues after that as well, since you're the first person afaik
>>>>>>>>>>>>> to try building with MinGW
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> On Sun, Mar 27, 2016 at 10:29 PM Eran Ifrah via lldb-dev <
>>>>>>>>>>>>> lldb-dev at lists.llvm.org> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I have built LLDB on Windows 7 using MinGW64/4.9.2 (took some
>>>>>>>>>>>>>> effort to get the job done...)
>>>>>>>>>>>>>> When I tried to debug a simple hello world executable, I get
>>>>>>>>>>>>>> this output:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> D:\software\msys-for-clang\1.0\home\PC\build-release-64-lldb\bin>lldb.exe
>>>>>>>>>>>>>> HelloWorld.exe
>>>>>>>>>>>>>> (lldb) target create "HelloWorld.exe"
>>>>>>>>>>>>>> Current executable set to 'HelloWorld.exe' (x86_64).
>>>>>>>>>>>>>> (lldb) b main.cpp:7
>>>>>>>>>>>>>> Breakpoint 1: where = HelloWorld.exe`main + 26 at main.cpp:7,
>>>>>>>>>>>>>> address = 0x000000000040154a
>>>>>>>>>>>>>> (lldb) r
>>>>>>>>>>>>>> error: process launch failed: unable to locate lldb-server
>>>>>>>>>>>>>> (lldb)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I can't seem to locate lldb-server anywhere, and according
>>>>>>>>>>>>>> to LLDBConfig.cmake, this target should not get built on Windows:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> # Figure out if lldb could use lldb-server. If so, then we'll
>>>>>>>>>>>>>> # ensure we build lldb-server when an lldb target is being
>>>>>>>>>>>>>> built.
>>>>>>>>>>>>>> if ((CMAKE_SYSTEM_NAME MATCHES "Darwin") OR
>>>>>>>>>>>>>> (CMAKE_SYSTEM_NAME MATCHES "FreeBSD") OR
>>>>>>>>>>>>>> (CMAKE_SYSTEM_NAME MATCHES "Linux") OR
>>>>>>>>>>>>>> (CMAKE_SYSTEM_NAME MATCHES "NetBSD"))
>>>>>>>>>>>>>> set(LLDB_CAN_USE_LLDB_SERVER 1)
>>>>>>>>>>>>>> else()
>>>>>>>>>>>>>> set(LLDB_CAN_USE_LLDB_SERVER 0)
>>>>>>>>>>>>>> endif()
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and in the tools/CMakeLists.txt file we have this:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> if (LLDB_CAN_USE_LLDB_SERVER)
>>>>>>>>>>>>>> add_subdirectory(lldb-server)
>>>>>>>>>>>>>> endif()
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Any ideas?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> --
>>>>>>>>>>>>>> Eran Ifrah,
>>>>>>>>>>>>>> Author of
>>>>>>>>>>>>>> CodeLite
>>>>>>>>>>>>>> , a cross platform open source C/C++ IDE:
>>>>>>>>>>>>>> http://www.codelite.org
>>>>>>>>>>>>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>> lldb-dev mailing list
>>>>>>>>>>>>>> lldb-dev at lists.llvm.org
>>>>>>>>>>>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> Eran Ifrah,
>>>>>>>>>>>> Author of codelite, a cross platform open source C/C++ IDE:
>>>>>>>>>>>> http://www.codelite.org
>>>>>>>>>>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Eran Ifrah,
>>>>>>>>>> Author of codelite, a cross platform open source C/C++ IDE:
>>>>>>>>>> http://www.codelite.org
>>>>>>>>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>>>>>>>>
>>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Eran Ifrah,
>>>>>>> Author of codelite, a cross platform open source C/C++ IDE:
>>>>>>> http://www.codelite.org
>>>>>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Eran Ifrah,
>>>>> Author of codelite, a cross platform open source C/C++ IDE:
>>>>> http://www.codelite.org
>>>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Eran Ifrah,
>>>> Author of codelite, a cross platform open source C/C++ IDE:
>>>> http://www.codelite.org
>>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>>
>>>
>>>
>>>
>>> --
>>> Eran Ifrah,
>>> Author of codelite, a cross platform open source C/C++ IDE:
>>> http://www.codelite.org
>>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>>
>>
>>
>>
>> --
>> Eran Ifrah,
>> Author of codelite, a cross platform open source C/C++ IDE:
>> http://www.codelite.org
>> CodeLite IDE Blog: http://codeliteide.blogspot.com/
>>
>
--
Eran Ifrah,
Author of codelite, a cross platform open source C/C++ IDE:
http://www.codelite.org
CodeLite IDE Blog: http://codeliteide.blogspot.com/
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