[lldb-dev] How LLDB plug-ins loaded on Windows?

[Zachary Turner via lldb-dev]

It’s been a while since i was close to this code, so adding people who have
been in there more recently

On Thu, Jul 5, 2018 at 1:12 PM Salahuddin Khan <sjkhan at outlook.com> wrote:

> Hi Zachary,
>
>
>
> Ahh ok, thanks for your quick response.
>
>
>
> I was hoping to use LLDB on Windows (to debug Go code), which I know is
> DWARF based (and I thought would work on Windows), but since I couldn’t
> seem to set a breakpoint in C/C++/Go, so I thought perhaps plug-ins weren’t
> being loaded (although it’s not possible to ‘load’ a .lib file, they have
> to be included during link time).
>
>
>
> However, longer term I’m also hoping to replace the kernel debugger for my
> own operating system (a personal OS written from scratch) with LLDB. My OS
> uses the PE file format and has PDBs too – currently compiled on Windows
> using a very old version of the Windows DDK. I’m in the process of moving
> to a new build system using clang. I was using DIA to some degree and
> debugging from Windows, but I eventually hope to be able to debug one
> system from another also running the OS, so non-Windows support would be
> good.
>
>
>
> Any idea which pieces are missing on Windows? I’m probably going to start
> debugging lldb to figure it out, but knowing what is needed would help
> significantly.
>
>
>
> Thanks,
>
> Salah
>
>
>
> *From:* Zachary Turner <zturner at google.com>
> *Sent:* Thursday, July 05, 2018 12:56 PM
> *To:* Salahuddin Khan <sjkhan at outlook.com>
> *Cc:* lldb-dev at lists.llvm.org
> *Subject:* Re: [lldb-dev] How LLDB plug-ins loaded on Windows?
>
>
>
> Plugin is a bit misleading. All “plugins” are compiled into lldb. Plugins
> are really just a layering abstraction.
>
> To answer your question, pdb works currently but is limited in
> functionality. First, it only supports limited usage scenarios, and second
> it requires Windows. It’s currently built on top of DIA. If you need PDB
> support on non Windows it will be quite a bit of work (although there’s
> people making gradual progress on it). If you need it on Windows it
> basically works but you’ll have to fill in some missing pieces. Several
> other people have been submitting patches in this area as well recently
>
> On Thu, Jul 5, 2018 at 12:47 PM Salahuddin Khan via lldb-dev <
> lldb-dev at lists.llvm.org> wrote:
>
> Hi All,
>
>
>
> I’m somewhat puzzled by the plug-ins in LLDB, specifically on Windows.
>
>
>
> When examining the lib directory after building LLVM/LLDB, I noticed at
> lot of lldbPlugin*.lib files. However, it’s not clear if or how these are
> included in LLDB.
>
>
>
> Here’s one example:
>
> lldbPluginSymbolFilePDB.lib
>
>
>
> Are these compiled into lldb.exe and if so, how are they invoked? I’m
> trying to determine if PDB symbols are currently working, and if not, what
> would be required to make them work.
>
>
>
> Thanks,
>
> Salah
>
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