C++ (Cpp) mach_vm_behavior_set Examples

Example #1

File: kern_mman.c Project: MACasuba/MACasuba-Utils-git

int
madvise(__unused proc_t p, struct madvise_args *uap, __unused register_t *retval)
{
	vm_map_t user_map;
	mach_vm_offset_t start;
	mach_vm_size_t size;
	vm_behavior_t new_behavior;
	kern_return_t	result;

	/*
	 * Since this routine is only advisory, we default to conservative
	 * behavior.
	 */
	switch (uap->behav) {
		case MADV_RANDOM:
			new_behavior = VM_BEHAVIOR_RANDOM;
			break;
		case MADV_SEQUENTIAL: 
			new_behavior = VM_BEHAVIOR_SEQUENTIAL;
			break;
		case MADV_NORMAL:
			new_behavior = VM_BEHAVIOR_DEFAULT;
			break;
		case MADV_WILLNEED:
			new_behavior = VM_BEHAVIOR_WILLNEED;
			break;
		case MADV_DONTNEED:
			new_behavior = VM_BEHAVIOR_DONTNEED;
			break;
		default:
			return(EINVAL);
	}

	start = (mach_vm_offset_t) uap->addr;
	size = (mach_vm_size_t) uap->len;
	
	user_map = current_map();

	result = mach_vm_behavior_set(user_map, start, size, new_behavior);
	switch (result) {
		case KERN_SUCCESS:
			return (0);
		case KERN_INVALID_ADDRESS:
			return (ENOMEM);
	}

	return (EINVAL);
}

Example #2

File: kern_mman.c Project: argp/xnu

		       "failing madvise(0x%llx,0x%llx,%s)\n",
		       p->p_pid, p->p_comm, start, size,
		       ((uap->behav == MADV_FREE_REUSABLE)
			? "MADV_FREE_REUSABLE"
			: "MADV_FREE"));
		DTRACE_VM3(fourk_compat_madvise,
			   uint64_t, start,
			   uint64_t, size,
			   int, uap->behav);
		return EINVAL;
	}
#endif /* __arm64__ */

	user_map = current_map();

	result = mach_vm_behavior_set(user_map, start, size, new_behavior);
	switch (result) {
	case KERN_SUCCESS:
		return 0;
	case KERN_INVALID_ADDRESS:
		return EINVAL;
	case KERN_NO_SPACE:	
		return ENOMEM;
	}

	return EINVAL;
}

int
mincore(__unused proc_t p, struct mincore_args *uap, __unused int32_t *retval)
{

Example #3

File: kern_mman.c Project: onlynone/xnu

int
madvise(__unused proc_t p, struct madvise_args *uap, __unused int32_t *retval)
{
	vm_map_t user_map;
	mach_vm_offset_t start;
	mach_vm_size_t size;
	vm_behavior_t new_behavior;
	kern_return_t	result;

	/*
	 * Since this routine is only advisory, we default to conservative
	 * behavior.
	 */
	switch (uap->behav) {
		case MADV_RANDOM:
			new_behavior = VM_BEHAVIOR_RANDOM;
			break;
		case MADV_SEQUENTIAL: 
			new_behavior = VM_BEHAVIOR_SEQUENTIAL;
			break;
		case MADV_NORMAL:
			new_behavior = VM_BEHAVIOR_DEFAULT;
			break;
		case MADV_WILLNEED:
			new_behavior = VM_BEHAVIOR_WILLNEED;
			break;
		case MADV_DONTNEED:
			new_behavior = VM_BEHAVIOR_DONTNEED;
			break;
		case MADV_FREE:
			new_behavior = VM_BEHAVIOR_FREE;
			break;
		case MADV_ZERO_WIRED_PAGES:
			new_behavior = VM_BEHAVIOR_ZERO_WIRED_PAGES;
			break;
		case MADV_FREE_REUSABLE:
			new_behavior = VM_BEHAVIOR_REUSABLE;
			break;
		case MADV_FREE_REUSE:
			new_behavior = VM_BEHAVIOR_REUSE;
			break;
		case MADV_CAN_REUSE:
			new_behavior = VM_BEHAVIOR_CAN_REUSE;
			break;
		case MADV_PAGEOUT:
#if MACH_ASSERT
			new_behavior = VM_BEHAVIOR_PAGEOUT;
			break;
#else /* MACH_ASSERT */
			return ENOTSUP;
#endif /* MACH_ASSERT */
		default:
			return(EINVAL);
	}

	start = (mach_vm_offset_t) uap->addr;
	size = (mach_vm_size_t) uap->len;
	

	user_map = current_map();

	result = mach_vm_behavior_set(user_map, start, size, new_behavior);
	switch (result) {
	case KERN_SUCCESS:
		return 0;
	case KERN_INVALID_ADDRESS:
		return EINVAL;
	case KERN_NO_SPACE:	
		return ENOMEM;
	}

	return EINVAL;
}