July 2017
Intermediate to advanced
244 pages
6h 33m
English
Content preview from Mastering C++ Multithreading
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Fishy argument values
For memory allocation functions, Memcheck validates whether the arguments passed to them actually make sense. One example of this would be the passing of a negative size, or if it would far exceed a reasonable allocation size: for example, an allocation request for a petabyte of memory. Most likely, these values would be the result of a faulty calculation earlier in the code.
Memcheck would report this error like in this example from the Memcheck manual:
==32233== Argument 'size' of function malloc has a fishy (possibly negative) value: -3==32233== at 0x4C2CFA7: malloc (vg_replace_malloc.c:298)==32233== by 0x400555: foo (fishy.c:15)==32233== by 0x400583: main (fishy.c:23)
Here it was attempted to pass the value of ...
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