[SOLVED] Issue with Command Line Application and GetMem?
lazarus / 32-Linux

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MathMan · 2016-05-17 09:45

Hi all,

Environment: FPC 3.0.0 / Lazarus 1.6.0 / Ubuntu LTE 15.04

Last week I developed a small command line application to address some
issues I experienced regarding benchmarking. The tool uses several
units I am also using in a general GUI application.

So far everything is working fine with one small exception. Some of
the routines I want to benchmark allocate scratch memory via GetMem.
Every time I try to benchmark these I get unexpected program
terminations. Funny thing is that the main command line program is
allocating memory too - but here everything seems to work ok.

I did of course check that that the units get re-compiled when I
compile the command line application.

Any ideas?

Kind regards,
MathMan

[Edit:] It is solved but actually I don't know what happened. I spent
some time debugging without identification of the root cause which
then mysteriously dissapeared. I suspect that even though I tried to
make sure that everything gets re-compiled when switching use of some
units from the GUI to the command line app something slipped and
caused the error.

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marcov · 2016-05-17 10:03

Well, the obvious one, the benchmark program overwrites memory that it
shouldn't.

range checks, -gtt and valgrind are your friends there.

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MathMan · 2016-05-17 11:10

Quote from: marcov on May 17, 2016, 12:03:30 pmWell, the obvious one,
the benchmark program overwrites memory that it shouldn't.

range checks, -gtt and valgrind are your friends there.

I'll give it a try.

Kind regards,
MathMan