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Set breakpoint [message #1852241]

Thu, 05 May 2022 16:29

Jacques Klein

Messages: 2
Registered: April 2022

Junior Member

Simple example.

class X {
String _v;

X() {
........
_v = .....; // line N-1
} // line N

public String toString() { return _v; }
}

Rq: I cannot edit the source code

If I want to "see" the (toString()) value of every new X, I put a breakpoint in the X constructor,
ideally at line N, BUT I cannot (why not?).
what I can do is put the bp at line N-1, but this forces me to do Next :-(.

Is there any solution to this annoying behavior ?

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Re: Set breakpoint [message #1852245 is a reply to message #1852241]

Thu, 05 May 2022 18:52

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

The breakpoints use a very simple but effective line number comparison, so they only work on lines at which execution stops, and may wirk multiple times if execution stops many times as for a loop.

I find that adding dummy lines such as getClass(); solve the problem.

Regards

Ed Willink

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Re: Set breakpoint [message #1852246 is a reply to message #1852245]

Thu, 05 May 2022 19:12

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

Set a breakpoint at the line with X() and then use the context menu on that breakpoint decoration to look at the Breakpoint Properties; you'll see checkboxes for Entry and Exit. The Exit checkbox will do what you want I think...

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: Set breakpoint [message #1852249 is a reply to message #1852246]

Fri, 06 May 2022 04:36

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

Yes, but unfortunately the performance for entry breakpoints at least is much worse than dreadful. Avoid entry breakpoints wherever possible. see e.g https://bugs.eclipse.org/bugs/show_bug.cgi?id=182650

Regards

Ed Willink

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Re: Set breakpoint [message #1852253 is a reply to message #1852249]

Fri, 06 May 2022 08:29

Jay Arthanareeswaran

Messages: 128
Registered: July 2009

Senior Member

Exit breakpoints as perfect for this, as Ed pointed out. I am sure there's some price involved, but in my experience, they are not half as bad as conditional breakpoints.

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