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valgrind problem, heap-leak debugging [message #44252]

Fri, 13 February 2015 08:05

slashupp
Messages: 231
Registered: July 2009

Experienced Member

Running my app ends with "Heap-leaks detected".

I don't do "new" anywhere, so there is no obvious place to start looking for the problem.

So I try [Debug/Test with Valgrind] and get a huge amount of output.
This is not helpful.

1. Is there a way I can force valgrind to just focus on my app and ignore upp-sources?

2. What other ways can I use to find the cause of the heap-leak?

---
PS: .. to maybe help others with same kind of problem ..
I've found the cause: needed a virtual dtor in a struct I was using, added it and the heap-leaks went away.
How I found it: Searched SO and found this answer [http://stackoverflow.com/a/2480641/15161]:
Quote:

[..] code that creates your object on the heap. It would be bad practice for your class to assume that it is always going to be created on the stack...

My struct is defined within a class and instances are created, used and passed as parameters
all over the place (without the SO-clue (and only with this dysfunctional valgrind-hook) it would have
been a real mission to find)

The two questions I think remains valid and any answers would be helpful for the future.

[Updated on: Fri, 13 February 2015 09:12]

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Re: valgrind problem, heap-leak debugging [message #44253 is a reply to message #44252]

Fri, 13 February 2015 10:09

mirek
Messages: 14271
Registered: November 2005

Ultimate Member

[quote title=slashupp wrote on Fri, 13 February 2015 08:05]Running my app ends with "Heap-leaks detected".

I don't do "new" anywhere, so there is no obvious place to start looking for the problem.

So I try [Debug/Test with Valgrind] and get a huge amount of output.
This is not helpful.

1. Is there a way I can force valgrind to just focus on my app and ignore upp-sources?

2. What other ways can I use to find the cause of the heap-leak?

---
PS: .. to maybe help others with same kind of problem ..
I've found the cause: needed a virtual dtor in a struct I was using, added it and the heap-leaks went away.
[/code]

Yeah, with U++, memory leaks are caused by missing virtual destructor in 95% of cases. Happens to me too.

BTW, U++ has a quite good way to resolve memory leaks:

http://www.ultimatepp.org/srcdoc$Core$Leaks$en-us.html

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