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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: DebugBreak() in Ada
Date: Tue, 25 Apr 2023 18:20:20 +0100
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Petter <petter_fryklund@hotmail.com> writes:

> I used some way to cause a DebugBreak() (programmatically causeng a
> break command in gdb) some 10 years ago. Now I can't find it. Perhaps
> one could raise int3? But I can't find how to either.

I just googled debugbreak and the third hit was this:
  https://github.com/scottt/debugbreak

It'd need some work, but at least on macOS/x86_64 GCC & clang[++] both
give a SIGTRAP.