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Home » U++ Library support » U++ Library : Other (not classified elsewhere) » Heap errors behavior is dependent on target machine. (Heap errors occur on one machine but not on a another.)

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[RESOLVED] Re: Heap errors behavior is dependent on target machine. [message #45566 is a reply to message #45563]

Fri, 04 December 2015 15:29

jfranks is currently offline

jfranks
Messages: 36
Registered: September 2014
Location: Houston, Texas

Member

Mirek,

Thank you so much for improving U++ memory diagnostic so
that stdc++ strings from shared library are ignored.

As promised, here is the rest of the story to a successful
completion of this effort.

We were not able to use the breakpoint feature in the
U++ heap diag because each run of the application produced
different breakpoint serial numbers. This happened because
memory leak in our application occured on different threads
and events plus scheduling produced a non-deterministic
pattern for assigning serial numbers to each leak detected.

That is why I resorted to temporarily putting an assert
into heap diag memory allocator for size 812 and 828.
This pointed right back to our application code in a place
we did not expect. The memory heap leak ignore function
did not work on this because our code implemented a factory
class for creating event messages inside our application,
which the linker put into a special section (by design) as
the application was loaded into memory. These event messages
were related to custom hardware that was available only to
machine 'B' and not available for machine 'A' due to the
lack of a driver in the VM. It turned out that some of these
messages were mishandled in our application, which caused
the heap diag error only on machine 'B', and not on machine 'A'.

We could have never completed our mission without your help
and the improvements to heap diag regarding the stdc++
strings ignore outside our application. This is great work.
U++ and theIDE have become impressive over the years.
Again, thank you for your help.

Our application now works perfectly on exit and does not have
memory heap errors anymore !!

-- Jeff

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[Message index]

		Heap errors behavior is dependent on target machine. By: jfranks on Sat, 28 November 2015 14:03
		Re: Heap errors behavior is dependent on target machine. By: mirek on Sat, 28 November 2015 18:43
		Re: Heap errors behavior is dependent on target machine. By: jfranks on Sat, 28 November 2015 22:37
		Re: Heap errors behavior is dependent on target machine. By: mirek on Sun, 29 November 2015 07:07
		Re: Heap errors behavior is dependent on target machine. By: mirek on Sun, 29 November 2015 12:53
		Re: Heap errors behavior is dependent on target machine. By: jfranks on Sun, 29 November 2015 18:34
		Re: Heap errors behavior is dependent on target machine. By: mirek on Sun, 29 November 2015 18:48
		Re: Heap errors behavior is dependent on target machine. By: jfranks on Mon, 30 November 2015 02:50
		Re: Heap errors behavior is dependent on target machine. By: mirek on Mon, 30 November 2015 10:03
		Re: Heap errors behavior is dependent on target machine. By: mirek on Mon, 30 November 2015 10:05
		Re: Heap errors behavior is dependent on target machine. By: mirek on Mon, 30 November 2015 10:45
		Re: Heap errors behavior is dependent on target machine. By: jfranks on Tue, 01 December 2015 05:58
		Re: Heap errors behavior is dependent on target machine. By: mirek on Tue, 01 December 2015 19:48
		Re: Heap errors behavior is dependent on target machine. By: jfranks on Wed, 02 December 2015 16:44
		[RESOLVED] Re: Heap errors behavior is dependent on target machine. By: jfranks on Fri, 04 December 2015 15:29
		Re: [RESOLVED] Re: Heap errors behavior is dependent on target machine. By: mirek on Fri, 04 December 2015 17:09
		Re: [RESOLVED] Re: Heap errors behavior is dependent on target machine. By: Mindtraveller on Fri, 04 December 2015 19:36

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