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digitalmars.D - -gc in dmd?

reply WebFreak001 <d.forum webfreak.org> writes:
Does DMD have a -gc flag comparable to the LDC flag? (emit C 
compatible debug information)

I thought it had that but seems like it doesn't exist actually. I 
need it because the Visual Studio debugger (VSDBG) only works 
with C/C++ style names and thinks arrays/associative arrays of 
the form like int[] are illegal because of the []

It's also only possible to add wildcards inside C++ style 
template arguments (<T>) so something like slice<T> in LDC would 
be nice to have.

This would greatly improve the debugging experience on Windows as 
then arrays and associative arrays could work with visualizers. 
(like using the new natvis visualizer)

Only being restricted to LDC with -gc might be a bad constraint 
for some users, so I'm looking for something that works with both 
compilers. mago-mi doesn't seem to work at all (running works, no 
breakpoint support or anything else though)
Apr 07 2021
next sibling parent Andre Pany <andre s-e-a-p.de> writes:
On Wednesday, 7 April 2021 at 11:36:59 UTC, WebFreak001 wrote:

 Does DMD have a -gc flag comparable to the LDC flag? (emit C 
 compatible debug information)

 I thought it had that but seems like it doesn't exist actually. 
 I need it because the Visual Studio debugger (VSDBG) only works 
 with C/C++ style names and thinks arrays/associative arrays of 
 the form like int[] are illegal because of the []

 It's also only possible to add wildcards inside C++ style 
 template arguments (<T>) so something like slice<T> in LDC 
 would be nice to have.

 This would greatly improve the debugging experience on Windows 
 as then arrays and associative arrays could work with 
 visualizers. (like using the new natvis visualizer)

 Only being restricted to LDC with -gc might be a bad constraint 
 for some users, so I'm looking for something that works with 
 both compilers. mago-mi doesn't seem to work at all (running 
 works, no breakpoint support or anything else though)


Some years ago I got mago-mi working in IntelliJ D plugin, but 
yes, it was a try and error until I got the right order and 
syntax. Maybe this is a starting point:
https://github.com/rainers/mago/issues/14#issuecomment-395517912

You can also look at the DLangIde about the order and syntax of 
the commands in the debugger log output.

Kind regards
Andre
Apr 07 2021
prev sibling next sibling parent reply Mathias LANG <geod24 gmail.com> writes:
On Wednesday, 7 April 2021 at 11:36:59 UTC, WebFreak001 wrote:

 Does DMD have a -gc flag comparable to the LDC flag? (emit C 
 compatible debug information)

 [...]

 Only being restricted to LDC with -gc might be a bad constraint 
 for some users, so I'm looking for something that works with 
 both compilers. mago-mi doesn't seem to work at all (running 
 works, no breakpoint support or anything else though)


https://github.com/dlang/dmd/pull/4766
Is VSDBG not extensible in any way ? What does other languages 
(Go, Rust) do here ? Adding back `-gc` would be a step back IMO.
Apr 07 2021
parent WebFreak001 <d.forum webfreak.org> writes:
On Thursday, 8 April 2021 at 06:06:58 UTC, Mathias LANG wrote:

 On Wednesday, 7 April 2021 at 11:36:59 UTC, WebFreak001 wrote:

 Does DMD have a -gc flag comparable to the LDC flag? (emit C 
 compatible debug information)

 [...]

 Only being restricted to LDC with -gc might be a bad 
 constraint for some users, so I'm looking for something that 
 works with both compilers. mago-mi doesn't seem to work at all 
 (running works, no breakpoint support or anything else though)


 https://github.com/dlang/dmd/pull/4766
 Is VSDBG not extensible in any way ? What does other languages 
 (Go, Rust) do here ? Adding back `-gc` would be a step back IMO.


 From https://github.com/rust-lang/rust/issues/36503 I assume no 
and it looks like they emit C++ compatible debug symbols
Apr 07 2021
prev sibling next sibling parent reply Siemargl <inqnone gmail.com> writes:
On Wednesday, 7 April 2021 at 11:36:59 UTC, WebFreak001 wrote:

 This would greatly improve the debugging experience on Windows 
 as then arrays and associative arrays could work with 
 visualizers. (like using the new natvis visualizer)

 Only being restricted to LDC with -gc might be a bad constraint 
 for some users, so I'm looking for something that works with 
 both compilers. mago-mi doesn't seem to work at all (running 
 works, no breakpoint support or anything else though)


I take mago-mi  from 
https://ci.appveyor.com/project/rainers/mago/build/artifacts
and basically it works for x86 apps, breakpoints stops, array are 
shown, but not AA.
Apr 07 2021
next sibling parent reply Siemargl <inqnone gmail.com> writes:
I tested all debuggers for Windows, but best (most working) was 
WinDBG from Win10 SDK
Apr 08 2021
parent Imperatorn <johan_forsberg_86 hotmail.com> writes:
On Thursday, 8 April 2021 at 07:10:23 UTC, Siemargl wrote:

 I tested all debuggers for Windows, but best (most working) was 
 WinDBG from Win10 SDK


Yeah, I would also recommend trying the preview version:
https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/debugging-using-windbg-preview

https://www.microsoft.com/en-us/p/windbg-preview/9pgjgd53tn86?activetab=pivot:overviewtab
Apr 08 2021
prev sibling parent Andre Pany <andre s-e-a-p.de> writes:
On Thursday, 8 April 2021 at 06:42:09 UTC, Siemargl wrote:

 On Wednesday, 7 April 2021 at 11:36:59 UTC, WebFreak001 wrote:

 This would greatly improve the debugging experience on Windows 
 as then arrays and associative arrays could work with 
 visualizers. (like using the new natvis visualizer)

 Only being restricted to LDC with -gc might be a bad 
 constraint for some users, so I'm looking for something that 
 works with both compilers. mago-mi doesn't seem to work at all 
 (running works, no breakpoint support or anything else though)


 I take mago-mi  from 
 https://ci.appveyor.com/project/rainers/mago/build/artifacts
 and basically it works for x86 apps, breakpoints stops, array 
 are shown, but not AA.


To debug x86_64 applications you need also MagoRemote.exe and a 
regedit key 
"HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\MagoDebugger" with a 
value "Remote_x64" containing path to "MagoRemote.exe" e.g. 
"C:\Program Files (x86)\VisualD\Mago\MagoRemote.exe".

(But as far as I know, WebFreak001 recently did a PR which should 
find MagoRemote in the same folder).

Kind regards
Andre
Apr 08 2021
prev sibling parent Rainer Schuetze <r.sagitario gmx.de> writes:
On 07/04/2021 13:36, WebFreak001 wrote:

 Does DMD have a -gc flag comparable to the LDC flag? (emit C compatible
 debug information)
 
 I thought it had that but seems like it doesn't exist actually. I need
 it because the Visual Studio debugger (VSDBG) only works with C/C++
 style names and thinks arrays/associative arrays of the form like int[]
 are illegal because of the []


The VS Code debug engine for C++ actually uses the same architecture as
the debugger in Visual Studio, but misses a tiny bit: you cannot add
source language mappings. So using the mago expression evaluator
extension is likely to work once they add a possibility to load it.

You might want to remind the developers that this is still of interest:
https://github.com/microsoft/vscode-cpptools/issues/2932
Apr 10 2021