STINNER Victor added the comment:
> So once these functions are decorated with this attribute, what kind of
> testing/validation you have in mind, please let me know.
Call PyMem_Malloc(Py_ssize_t) for example: it must emit a warning on GCC 7,
since casting negative values to size_t overflows.
Not sure how to test the attribute on GCC 6. Maybe some GCC related static
analyzers are able to detect memory leaks like:
void test(void)
{
void *ptr = PyMem_Malloc(16);
/* don't free ptr */
}
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<http://bugs.python.org/issue29674>
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