void VMDestroy(VM vm)
{
/* All vm areas should have been unmapped. */
AVERT(VM, vm);
AVER(vm->mapped == (Size)0);
AVER(vm->reserved == AddrOffset(vm->base, vm->limit));
memset((void *)vm->base, VMJunkBYTE, AddrOffset(vm->base, vm->limit));
free(vm->block);
vm->sig = SigInvalid;
free(vm);
EVENT1(VMDestroy, vm);
}
static void BufferAbsFinish(Inst inst)
{
Buffer buffer = MustBeA(Buffer, inst);
AVERT(Buffer, buffer);
AVER(BufferIsReset(buffer));
/* Detach the buffer from its owning pool and unsig it. */
RingRemove(&buffer->poolRing);
InstFinish(MustBeA(Inst, buffer));
buffer->sig = SigInvalid;
/* Finish off the generic buffer fields. */
RingFinish(&buffer->poolRing);
EVENT1(BufferFinish, buffer);
}
void VMFinish(VM vm)
{
BOOL b;
AVERT(VM, vm);
/* Descriptor must not be stored inside its own VM at this point. */
AVER(PointerAdd(vm, sizeof *vm) <= vm->block
|| PointerAdd(vm->block, VMReserved(vm)) <= (Pointer)vm);
/* All address space must have been unmapped. */
AVER(VMMapped(vm) == (Size)0);
EVENT1(VMFinish, vm);
vm->sig = SigInvalid;
b = VirtualFree((LPVOID)vm->block, (SIZE_T)0, MEM_RELEASE);
AVER(b != 0);
}
void VMDestroy(VM vm)
{
BOOL b;
AVERT(VM, vm);
AVER(vm->mapped == 0);
/* This appears to be pretty pointless, since the vm descriptor page
* is about to vanish completely. However, the VirtualFree might
* fail and it would be nice to have a dead sig there. */
vm->sig = SigInvalid;
b = VirtualFree((LPVOID)vm->base, (SIZE_T)0, MEM_RELEASE);
AVER(b != 0);
b = VirtualFree((LPVOID)vm, (SIZE_T)0, MEM_RELEASE);
AVER(b != 0);
EVENT1(VMDestroy, vm);
}
void VMDestroy(VM vm)
{
int r;
AVERT(VM, vm);
AVER(vm->mapped == (Size)0);
EVENT1(VMDestroy, vm);
/* This appears to be pretty pointless, since the descriptor */
/* page is about to vanish completely. However, munmap might fail */
/* for some reason, and this would ensure that it was still */
/* discovered if sigs were being checked. */
vm->sig = SigInvalid;
r = munmap((void *)vm->base, (size_t)AddrOffset(vm->base, vm->limit));
AVER(r == 0);
r = munmap((void *)vm,
(size_t)SizeAlignUp(sizeof(VMStruct), vm->align));
AVER(r == 0);
}