mago-mi: GDB/MI compatible frontend for Mago debugger

Bruno Medeiros via Digitalmars-d-announce digitalmars-d-announce at puremagic.com
Thu May 19 06:29:14 PDT 2016


On 19/05/2016 08:41, Vadim Lopatin wrote:
> On Wednesday, 18 May 2016 at 18:02:12 UTC, Bruno Medeiros wrote:
>> While DDT technically work oks with GDB (the GDB from mingw-w64 that
>> is), you are right, there isn't a compiler on Windows that supplies
>> debug info in the way GDB understands. See
>> https://wiki.dlang.org/Debuggers.
>>
>> DMD produces debug info COFF or OMF format, which GDB doesn't know
>> anything about (nor ever will). LDC should in theory work with DWARF
>> info, but this is broken somehow. Not because of LLVM though, since
>> for example Rust on Windows works. As for GDC, it doesn't even supply
>> binaries for Windows (that target Windows) -  it is not a supported
>> platform.
>>
>> BTW, Eclipse/DDT should in theory work with mago-mi as well, at least
>> if the protocol is implemented correctly. Have you tried it? I dunno
>> how complete your MI implementation is.
>
> So it looks like mago-mi might be helpful for DDT on Windows.
> mago-mi supports subset of GDB/MI commands enough for DlangIDE, but it
> can be easy extended.
>
> Currenlty supported commands can be shown using help command (use
> --interpreter=mi2 when running mago-mi, otherwise it will print non-MI
> commands). Also commands are listed in readme file
> https://github.com/buggins/mago/blob/master/MagoMI/mago-mi/README.md
>
> I didn't try DDT with mago-mi, and so I'm not sure which commands must
> be supported by debugger to get it working with DDT.
>
> To get list of commands DDT tries to use you can either add
> --log-file=magomi.log --log-level=TRACE to mago-mi command line or use
> debug build of mago-mi.
> It will all STDIN data to log file, and report errors for unsupported
> commands.
>

I also don't know which MI commands need to be supported to have it work 
with DDT. The thing is I didn't write the GDB debugger integration for 
DDT, I just reused the one from CDT. So I'm not that familiar with those 
internals.

BTW, the MI integration is fairly language agnostic, so in theory your 
debugger could be used by CDT to debug C/C++ programs too, no? At least 
those generated by DMC. Maybe Visual Studio ones too?

-- 
Bruno Medeiros
https://twitter.com/brunodomedeiros


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