• realhet (20/20) Jul 04 2020 Hi,
• Adam D. Ruppe (7/9) Jul 04 2020 use dmd with -m32 or -m32mscoff and it works correctly
• kinke (4/7) Jul 04 2020 For LDC, we don't do 'our own thing', but use MSVC++ EH, which
• Kagamin (2/2) Jul 04 2020 try
• realhet (6/8) Jul 07 2020 Thank You, this was the winner for me.

realhet <real_het hotmail.com> writes:

Hi,

I'd like to catch the OS Exceptions including:

- access violation
- int 3
- invalid opcode
etc.

The default behavior is that when these events happen, the 
program immediately exits with some negative exit code.

It was not a problem on other systems like: MSVC or Delphi, but 
on LDC these events are completely ignored.

It would be very useful to catch these errors inside and have the 
opportunity to handle it whatever is the best: application exit, 
save important data, ignore.

I've already found a solution from Adam D. Ruppe, but that's for 
Linux for the Access Violation case. But is there a similar thing 
for Windows as well?

PS: I do believe rely on AccessViolation to avoid buffer overruns 
is really useless and unsecure. But it would be so much help for 
me for developing/debugging my programs.

Thank You!

Adam D. Ruppe <destructionator gmail.com> writes:

On Saturday, 4 July 2020 at 12:45:50 UTC, realhet wrote:
 It was not a problem on other systems like: MSVC or Delphi, but 
 on LDC these events are completely ignored.

use dmd with -m32 or -m32mscoff and it works correctly 
automatically.

For whatever reason, dmd 64 bit and ldc decided to do their own 
thing instead of following the Windows standard and thus have no 
interop with OS exceptions.

Alas not much help if you must use those other builds....

kinke <noone nowhere.com> writes:

On Saturday, 4 July 2020 at 12:59:03 UTC, Adam D. Ruppe wrote:
 For whatever reason, dmd 64 bit and ldc decided to do their own 
 thing instead of following the Windows standard and thus have 
 no interop with OS exceptions.

For LDC, we don't do 'our own thing', but use MSVC++ EH, which 
allows to catch MSVC++ exceptions in D, and with some work, D 
exceptions in C++.

Kagamin <spam here.lot> writes:

try 
https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setunhandledexceptionfilter

realhet <real_het hotmail.com> writes:

On Saturday, 4 July 2020 at 14:44:06 UTC, Kagamin wrote:
 try 
 https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setunhandledexceptionfilter

Thank You, this was the winner for me.
Not just I can catch the OS Exceptions, I can check and alter the 
CPU state and decide to continue execution from an optionally 
modified cpu state, or just stop and show the error.

It needed some work, but this seems the best way for LDC2 Win64.