utalloc.c

linux-2.4.29操作系统的源码

	status = acpi_ut_track_allocation (ACPI_MEM_LIST_GLOBAL, allocation, size,
			  ACPI_MEM_MALLOC, component, module, line);
	if (ACPI_FAILURE (status)) {
		acpi_os_free (allocation);
		return (NULL);
	}

	acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].total_allocated++;
	acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].current_total_size += (u32) size;

	return ((void *) &allocation->user_space);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_callocate_and_track
 *
 * PARAMETERS:  Size                - Size of the allocation
 *              Component           - Component type of caller
 *              Module              - Source file name of caller
 *              Line                - Line number of caller
 *
 * RETURN:      Address of the allocated memory on success, NULL on failure.
 *
 * DESCRIPTION: Subsystem equivalent of calloc.
 *
 ******************************************************************************/

void *
acpi_ut_callocate_and_track (
	acpi_size                       size,
	u32                             component,
	char                            *module,
	u32                             line)
{
	struct acpi_debug_mem_block     *allocation;
	acpi_status                     status;


	allocation = acpi_ut_callocate (size + sizeof (struct acpi_debug_mem_block), component,
			  module, line);
	if (!allocation) {
		/* Report allocation error */

		_ACPI_REPORT_ERROR (module, line, component,
				("ut_callocate: Could not allocate size %X\n", (u32) size));
		return (NULL);
	}

	status = acpi_ut_track_allocation (ACPI_MEM_LIST_GLOBAL, allocation, size,
			   ACPI_MEM_CALLOC, component, module, line);
	if (ACPI_FAILURE (status)) {
		acpi_os_free (allocation);
		return (NULL);
	}

	acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].total_allocated++;
	acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].current_total_size += (u32) size;

	return ((void *) &allocation->user_space);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_free_and_track
 *
 * PARAMETERS:  Allocation          - Address of the memory to deallocate
 *              Component           - Component type of caller
 *              Module              - Source file name of caller
 *              Line                - Line number of caller
 *
 * RETURN:      None
 *
 * DESCRIPTION: Frees the memory at Allocation
 *
 ******************************************************************************/

void
acpi_ut_free_and_track (
	void                            *allocation,
	u32                             component,
	char                            *module,
	u32                             line)
{
	struct acpi_debug_mem_block     *debug_block;
	acpi_status                     status;


	ACPI_FUNCTION_TRACE_PTR ("ut_free", allocation);


	if (NULL == allocation) {
		_ACPI_REPORT_ERROR (module, line, component,
			("acpi_ut_free: Attempt to delete a NULL address\n"));

		return_VOID;
	}

	debug_block = ACPI_CAST_PTR (struct acpi_debug_mem_block,
			  (((char *) allocation) - sizeof (struct acpi_debug_mem_header)));

	acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].total_freed++;
	acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].current_total_size -= debug_block->size;

	status = acpi_ut_remove_allocation (ACPI_MEM_LIST_GLOBAL, debug_block,
			  component, module, line);
	if (ACPI_FAILURE (status)) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not free memory, %s\n",
			acpi_format_exception (status)));
	}

	acpi_os_free (debug_block);

	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p freed\n", allocation));

	return_VOID;
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_find_allocation
 *
 * PARAMETERS:  Allocation             - Address of allocated memory
 *
 * RETURN:      A list element if found; NULL otherwise.
 *
 * DESCRIPTION: Searches for an element in the global allocation tracking list.
 *
 ******************************************************************************/

struct acpi_debug_mem_block *
acpi_ut_find_allocation (
	u32                             list_id,
	void                            *allocation)
{
	struct acpi_debug_mem_block     *element;


	ACPI_FUNCTION_ENTRY ();


	if (list_id > ACPI_MEM_LIST_MAX) {
		return (NULL);
	}

	element = acpi_gbl_memory_lists[list_id].list_head;

	/* Search for the address. */

	while (element) {
		if (element == allocation) {
			return (element);
		}

		element = element->next;
	}

	return (NULL);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_track_allocation
 *
 * PARAMETERS:  Allocation          - Address of allocated memory
 *              Size                - Size of the allocation
 *              alloc_type          - MEM_MALLOC or MEM_CALLOC
 *              Component           - Component type of caller
 *              Module              - Source file name of caller
 *              Line                - Line number of caller
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Inserts an element into the global allocation tracking list.
 *
 ******************************************************************************/

acpi_status
acpi_ut_track_allocation (
	u32                             list_id,
	struct acpi_debug_mem_block     *allocation,
	acpi_size                       size,
	u8                              alloc_type,
	u32                             component,
	char                            *module,
	u32                             line)
{
	struct acpi_memory_list         *mem_list;
	struct acpi_debug_mem_block     *element;
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE_PTR ("ut_track_allocation", allocation);


	if (list_id > ACPI_MEM_LIST_MAX) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	mem_list = &acpi_gbl_memory_lists[list_id];
	status = acpi_ut_acquire_mutex (ACPI_MTX_MEMORY);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/*
	 * Search list for this address to make sure it is not already on the list.
	 * This will catch several kinds of problems.
	 */

	element = acpi_ut_find_allocation (list_id, allocation);
	if (element) {
		ACPI_REPORT_ERROR (("ut_track_allocation: Allocation already present in list! (%p)\n",
			allocation));

		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Element %p Address %p\n", element, allocation));

		goto unlock_and_exit;
	}

	/* Fill in the instance data. */

	allocation->size      = (u32) size;
	allocation->alloc_type = alloc_type;
	allocation->component = component;
	allocation->line      = line;

	ACPI_STRNCPY (allocation->module, module, ACPI_MAX_MODULE_NAME);

	/* Insert at list head */

	if (mem_list->list_head) {
		((struct acpi_debug_mem_block *)(mem_list->list_head))->previous = allocation;
	}

	allocation->next = mem_list->list_head;
	allocation->previous = NULL;

	mem_list->list_head = allocation;


unlock_and_exit:
	status = acpi_ut_release_mutex (ACPI_MTX_MEMORY);
	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_remove_allocation
 *
 * PARAMETERS:  Allocation          - Address of allocated memory
 *              Component           - Component type of caller
 *              Module              - Source file name of caller
 *              Line                - Line number of caller
 *
 * RETURN:
 *
 * DESCRIPTION: Deletes an element from the global allocation tracking list.
 *
 ******************************************************************************/

acpi_status
acpi_ut_remove_allocation (
	u32                             list_id,
	struct acpi_debug_mem_block     *allocation,
	u32                             component,
	char                            *module,
	u32                             line)
{
	struct acpi_memory_list         *mem_list;
	acpi_status                     status;


	ACPI_FUNCTION_TRACE ("ut_remove_allocation");


	if (list_id > ACPI_MEM_LIST_MAX) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	mem_list = &acpi_gbl_memory_lists[list_id];
	if (NULL == mem_list->list_head) {
		/* No allocations! */

		_ACPI_REPORT_ERROR (module, line, component,
				("ut_remove_allocation: Empty allocation list, nothing to free!\n"));

		return_ACPI_STATUS (AE_OK);
	}

	status = acpi_ut_acquire_mutex (ACPI_MTX_MEMORY);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/* Unlink */

	if (allocation->previous) {
		(allocation->previous)->next = allocation->next;
	}
	else {
		mem_list->list_head = allocation->next;
	}

	if (allocation->next) {
		(allocation->next)->previous = allocation->previous;
	}

	/* Mark the segment as deleted */

	ACPI_MEMSET (&allocation->user_space, 0xEA, allocation->size);

	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Freeing size 0%X\n", allocation->size));

	status = acpi_ut_release_mutex (ACPI_MTX_MEMORY);
	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_dump_allocation_info
 *
 * PARAMETERS:
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print some info about the outstanding allocations.
 *
 ******************************************************************************/

void
acpi_ut_dump_allocation_info (
	void)
{
/*
	struct acpi_memory_list         *mem_list;
*/

	ACPI_FUNCTION_TRACE ("ut_dump_allocation_info");

/*
	ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
			  ("%30s: %4d (%3d Kb)\n", "Current allocations",
			  mem_list->current_count,
			  ROUND_UP_TO_1K (mem_list->current_size)));

	ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
			  ("%30s: %4d (%3d Kb)\n", "Max concurrent allocations",
			  mem_list->max_concurrent_count,
			  ROUND_UP_TO_1K (mem_list->max_concurrent_size)));


	ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
			  ("%30s: %4d (%3d Kb)\n", "Total (all) internal objects",
			  running_object_count,
			  ROUND_UP_TO_1K (running_object_size)));

	ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
			  ("%30s: %4d (%3d Kb)\n", "Total (all) allocations",
			  running_alloc_count,
			  ROUND_UP_TO_1K (running_alloc_size)));


	ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
			  ("%30s: %4d (%3d Kb)\n", "Current Nodes",
			  acpi_gbl_current_node_count,
			  ROUND_UP_TO_1K (acpi_gbl_current_node_size)));

	ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
			  ("%30s: %4d (%3d Kb)\n", "Max Nodes",
			  acpi_gbl_max_concurrent_node_count,
			  ROUND_UP_TO_1K ((acpi_gbl_max_concurrent_node_count * sizeof (struct acpi_namespace_node)))));
*/
	return_VOID;
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_dump_allocations
 *
 * PARAMETERS:  Component           - Component(s) to dump info for.
 *              Module              - Module to dump info for.  NULL means all.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print a list of all outstanding allocations.
 *
 ******************************************************************************/

void
acpi_ut_dump_allocations (
	u32                             component,
	char                            *module)
{
	struct acpi_debug_mem_block     *element;
	union acpi_descriptor           *descriptor;
	u32                             num_outstanding = 0;


	ACPI_FUNCTION_TRACE ("ut_dump_allocations");


	/*
	 * Walk the allocation list.
	 */
	if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_MEMORY))) {
		return;
	}

	element = acpi_gbl_memory_lists[0].list_head;
	while (element) {
		if ((element->component & component) &&
			((module == NULL) || (0 == ACPI_STRCMP (module, element->module)))) {
			/* Ignore allocated objects that are in a cache */

			descriptor = ACPI_CAST_PTR (union acpi_descriptor, &element->user_space);
			if (descriptor->descriptor_id != ACPI_DESC_TYPE_CACHED) {
				acpi_os_printf ("%p Len %04X %9.9s-%d [%s] ",
						 descriptor, element->size, element->module,
						 element->line, acpi_ut_get_descriptor_name (descriptor));

				/* Most of the elements will be Operand objects. */

				switch (ACPI_GET_DESCRIPTOR_TYPE (descriptor)) {
				case ACPI_DESC_TYPE_OPERAND:
					acpi_os_printf ("%12.12s R%hd",
							acpi_ut_get_type_name (descriptor->object.common.type),
							descriptor->object.common.reference_count);
					break;

				case ACPI_DESC_TYPE_PARSER:
					acpi_os_printf ("aml_opcode %04hX",
							descriptor->op.asl.aml_opcode);
					break;

				case ACPI_DESC_TYPE_NAMED:
					acpi_os_printf ("%4.4s",
							acpi_ut_get_node_name (&descriptor->node));
					break;

				default:
					break;
				}

				acpi_os_printf ( "\n");
				num_outstanding++;
			}
		}
		element = element->next;
	}

	(void) acpi_ut_release_mutex (ACPI_MTX_MEMORY);

	/* Print summary */

	if (!num_outstanding) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
			"No outstanding allocations.\n"));
	}
	else {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
			"%d(%X) Outstanding allocations\n",
			num_outstanding, num_outstanding));
	}

	return_VOID;
}


#endif  /* #ifdef ACPI_DBG_TRACK_ALLOCATIONS */