This could possibly happen after syntax errors when freeing
the compiler data.

Arne Goedeke authored 9 years ago and Tobias S. Josefowitz committed 9 years ago

Fixes an infinity loop due to overflow. Also changed the round_up*() functions
to return 0 on overflow and made 1 the next power of two after 0.

C11 defines aligned_alloc. This can lead to all kinds of confusion, so
lets rename our internal function.

When sorting the free list during ba_walk(), the Valgrind macros were
used in the wrong order. This led to spurious Valgrind warnings.

In certain cases the block allocator kept around free pages. This
happened with markers used by the gc.

Blocks in the free list are now marked as free while the callback is
running. This helps detecting invalid accesses. Also fixed a bug in
the free list sort.

The family of round_up* functions rounds up to the next power of two.
This made most block allocators initial areas twice as big as intended.

The memory_info() function had a tendency to return values like
0 objects, total 120Kb

allocating many blocks and deallocation happens non linearly.