[Info-vax] Debugging a Pascal program under VMS V9.2-2

[Arne Vajhøj]

On 4/4/2024 6:26 PM, Single Stage to Orbit wrote:
> OK this is strange and maybe I've misundersood something but basically
> I can't exmaine values of variables, as below.

> DBG> examine username
> Debugger error in RSTTYPES\DBG$STA_SYMTYPE or session corruption
> DBG> examine output_dev
> Debugger error in RSTTYPES\DBG$STA_SYMTYPE or session corruption

> Versions in use -
> 
> OpenVMS x86 V9.2-2
> DEBUG V9.2-009
> PASCAL: V6.3-143 (GEM 50XC4)
> 
> I have checked and I have definitely compiled the program with /DEBUG
> /NOOPTIMIZE, and linked using /DEBGU
> 
> Any ideas?

I believe debugging info has been an area where the x86-64
compilers has been let us say "a tiny bit behind".

So I would not be surprised if it is just due to
debugging info not being perfect yet.

But I guess we will need to hear John R state
whether this is supposed to work or not with that
specific version combo.

For some problems I have been debugging on Alpha,
found problem and then fixed it on x86-64 where I
saw the problem. That approach obviously require
that it is not a porting problem.

Arne