How to simulate a Delphi breakpoint in code?

Question

I am pretty sure I have seen this before, but I haven't found out / remembered how to do it. I want to have a line of code that when executed from the Delphi debugger I want the debugger to pop-up like there was a break point on that line.

Something like:

FooBar := Foo(Bar); SimulateBreakPoint; // Cause break point to occur in Delphi IDE if attached WriteLn('Value: ' + FooBar); 

Hopefully that makes sense. I know I could use an exception, but that would be a lot more overhead then I want. It is for some demonstration code.

Thanks in advance!

Answer 1

To trigger the debugger from code (supposedly, I don't have a copy of delphi handy to try):

asm int 3 end; 

See this page:

http://17slon.com/blogs/gabr/2008/03/debugging-with-lazy-breakpoints.html

Answer 2

As Andreas Hausladen stated in comments to that artice, Win32 API DebugBreak() function is less DOS-ish and works equally well.