Compiler doesn't emit global variables

[mdparker]

ryuukk.dev reported this on 2023-03-27T23:21:02Z

Transfered from https://issues.dlang.org/show_bug.cgi?id=23811

CC List

• razvan.nitu1305

Description

Take this example:

OS: Windows x64
Debugger: Visual Studio Code

```dlang
module debugme;

struct NoticeMe
{
    int value_int;
}

NoticeMe notice_me_global;

void break_me()
{
NoticeMe i_am_local;
}

{}

Break at: i_am_local, and try to inspect notice_me_global

notice_me_global  // doesn't work
debugme.notice_me_global //doesn't work
debugme:notice_me_global //doesn't work
debugme::notice_me_global //doesn't work
debugme@notice_me_global // doesn't work

I should be able to inspect and watch globals

Notes:

• it works with visual studio when you have the visual d plugin
• it doesn't work on visual studio code debugger (wich uses msvc)
• it doesn't work with remedybg (https://remedybg.handmade.network/)

Notes 2:

D should provide great experience on popular editors/tools, otherwise what to tell to people?

Notes 3:

It works great out of the box with: c/c++/rust/zig/odin/jai

Notes 4:

I tried to raise awareness and ask questions on IRC/Forum, i was left blind, not a good outlook

Notes 5:

Making D great to use is my goal, just a reminder, in case people see me as a "complainer"

Notes 6:

People are too kind, they see X not working, they'll move on and choose Y instead, X team won't understand why people leave

Comments

razvan.nitu1305 commented on 2023-03-28T10:27:34Z

I don't use any of the tools you pointed out, but potential issues might be:

• the code is not compiled with -g
• notice_me_global is the user facing name, but in the resulting binary it's going to have a mangled name

Anyway, this seems more like a tool issue, rather than a compiler issue.

ryuukk.dev commented on 2023-03-28T11:09:16Z

As i mentioned in the forum post, it is compiled with debug -g -debug, i tried all kind of -g (-g -gf -gs)

The problem is displayed here:

https://godbolt.org/z/nYGfMTqYY

!dbg on the global for C++

missing for D

ryuukk.dev commented on 2023-03-28T11:10:26Z

nevermind my previous comment

ryuukk.dev commented on 2023-03-28T13:16:21Z

I opened an issue on the microsoft tracker, let's wait and see what they have to say: microsoft/vscode-cpptools#10751

ryuukk.dev commented on 2023-03-28T13:48:45Z

I provide more information on the forum post:https://forum.dlang.org/post/[email protected]

• C example that works
• D example that doesn't
• difference between PDBs identified
• perhaps debuggers doesn't understand names with a . (dot)

ryuukk.dev commented on 2023-03-28T14:48:45Z

I noticed in the pdb, there are no mention of the app_d module

I can only find:

      40 | S_PROCREF [size = 28] `app_d.main`
           module = 1, sum name = 0, offset = 40

and

       0 | S_GDATA32 [size = 40] `app_d.notice_me_global`
           type = 0x0074 (int), addr = 0003:3504

Is that why the debugger can't inspect global variables?

Why doesn't the pdb contain anything about app_d?