All further instances of asprintf() or vasprintf() in our codebase are either in libcryb-test or in individual unit tests, and in all cases, the only consequence of a failed call is that the result will say "no description" instead of either a description of the test or an explanation of how it failed. Therefore, we can simply ignore the problem and cast the call to void to satisfy gcc.
This is actually redundant, because we already check the pointer, which is NULL if and only if asprintf() fails and returns < 0, but the version of gcc used by Travis CI insists. I have not been able to reproduce the issue on any other platform available to me.
Instead of having libcryb-test provide main() and assume that the test program defines t_prepare() and t_cleanup(), have libcryb-test provide a t_main() function which the test program calls with pointers to its prepare and cleanup functions.
not the numbers themselves.
In t_malloc_printstats(), show information about mapped allocations.
In t_malloc_leaked(), check for leaked mapped allocations. Note that
they would show up anyway since the metadata are allocated from the
bucket allocator, but this makes them more visible.
a caller-provided buffer. Use it to warn about leaks in each individual
test case. Note that we can't fail a test case for leaking, because
individual test cases in a unit may modify shared state which is cleaned
up at the end of the series.
