Global variables not accessible with Visual Studio debugger

[Rainer Schuetze]

On 23/04/2022 15:41, pdgr wrote:
> On Saturday, 23 April 2022 at 13:29:16 UTC, pdgr wrote:
>> Thanks for the suggestions, the extern(C) thing doesn't work.. but in 
>> the disassembly I can see the mangled name and I can inspect the value 
>> in the watch window using that mangled name. Kinda annoying but it works.
> 
> Scratch that.. it doesn't actually work: the disassembly doesn't not 
> contain any mangled names, I mistook a hex value for the mangled name.

I suspect you are trying to watch a thread local variable that uses 
indirect addressing.

With shared or __gshared variables, you see the symbol being used as 
debug information, but the debugger cannot handle that as a C++ expression.

You can see the mangled symbol with "pragma(msg, var.mangleof)" at 
compile time. Using this in the watch window shows it as a "void*", 
which you can then cast to your type using C++-Syntax, e.g. 
"*(int*)_D3mod3tlsi".

I'd recommend installing Visual D including the debugger extension mago 
instead, though ;-)