Some architectures(DEC Alpha as a main outlier, but x86 may behave that
way by setting flags) raise traps on unaligned operations, which can be
either costly(having to talk to the kernel, which may have to emulate
the read) or could cause program termination.
Also adds a basic memory interval for checking if a pointer has any
business living within the heap. Most systems separate those anyways so
it avoids doing potentially dangerous operations.
This still however removes `MemoryIterate' from allocations, because
it's a real performance pickle. From my tests parsing large sync
replies, this commit is near instant(pv reports 23MiB/s on a 2MB sync).
Still need a good compromise along MemoryIterate(like maybe find out a
clever way to only make it run on a small subset, or maybe just randomly
run it from time to time, or maybe just roll without it except on some
soft of debug mode????)
This pull request brings Cytoplasm up from C89 to C99, which makes it much more portable across platforms. In particular, this pull request solves a number of issues with 32-bit platforms.
Closes#28.
Closes#12.
Closes#20.
Reviewed-on: #29
This allows some additional operations to be performed inside the memory
hooks, although it's still a bad idea to allocate or free memory while
inside the hook.
This is a temporary fix; I'm not convinced it will work on all platforms,
so I will probably end up removing all of the memory boundary code
altogether.
