drivers/acpi/utilities/utalloc.c

/******************************************************************************
 *
 * Module Name: utalloc - local memory allocation routines
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */


#include <acpi/acpi.h>

#define _COMPONENT          ACPI_UTILITIES
	 ACPI_MODULE_NAME    ("utalloc")

/* Local prototypes */

#ifdef	ACPI_DBG_TRACK_ALLOCATIONS
static struct acpi_debug_mem_block *
acpi_ut_find_allocation (
	void                            *allocation);

static acpi_status
acpi_ut_track_allocation (
	struct acpi_debug_mem_block     *address,
	acpi_size                       size,
	u8                              alloc_type,
	u32                             component,
	char                            *module,
	u32                             line);

static acpi_status
acpi_ut_remove_allocation (
	struct acpi_debug_mem_block     *address,
	u32                             component,
	char                            *module,
	u32                             line);
#endif	/* ACPI_DBG_TRACK_ALLOCATIONS */

#ifdef ACPI_DBG_TRACK_ALLOCATIONS
static acpi_status
acpi_ut_create_list (
	char                            *list_name,
	u16                             object_size,
	struct acpi_memory_list         **return_cache);
#endif


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_create_caches
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create all local caches
 *
 ******************************************************************************/

acpi_status
acpi_ut_create_caches (
	void)
{
	acpi_status                     status;


#ifdef ACPI_DBG_TRACK_ALLOCATIONS

	/* Memory allocation lists */

	status = acpi_ut_create_list ("Acpi-Global", 0,
			 &acpi_gbl_global_list);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	status = acpi_ut_create_list ("Acpi-Namespace", sizeof (struct acpi_namespace_node),
			 &acpi_gbl_ns_node_list);
	if (ACPI_FAILURE (status)) {
		return (status);
	}
#endif

	/* Object Caches, for frequently used objects */

	status = acpi_os_create_cache ("acpi_state", sizeof (union acpi_generic_state),
			 ACPI_MAX_STATE_CACHE_DEPTH, &acpi_gbl_state_cache);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	status = acpi_os_create_cache ("acpi_parse", sizeof (struct acpi_parse_obj_common),
			 ACPI_MAX_PARSE_CACHE_DEPTH, &acpi_gbl_ps_node_cache);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	status = acpi_os_create_cache ("acpi_parse_ext", sizeof (struct acpi_parse_obj_named),
			 ACPI_MAX_EXTPARSE_CACHE_DEPTH, &acpi_gbl_ps_node_ext_cache);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	status = acpi_os_create_cache ("acpi_operand", sizeof (union acpi_operand_object),
			 ACPI_MAX_OBJECT_CACHE_DEPTH, &acpi_gbl_operand_cache);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_caches
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Purge and delete all local caches
 *
 ******************************************************************************/

acpi_status
acpi_ut_delete_caches (
	void)
{

	(void) acpi_os_delete_cache (acpi_gbl_state_cache);
	acpi_gbl_state_cache = NULL;

	(void) acpi_os_delete_cache (acpi_gbl_operand_cache);
	acpi_gbl_operand_cache = NULL;

	(void) acpi_os_delete_cache (acpi_gbl_ps_node_cache);
	acpi_gbl_ps_node_cache = NULL;

	(void) acpi_os_delete_cache (acpi_gbl_ps_node_ext_cache);
	acpi_gbl_ps_node_ext_cache = NULL;

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_validate_buffer
 *
 * PARAMETERS:  Buffer              - Buffer descriptor to be validated
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
 *
 ******************************************************************************/

acpi_status
acpi_ut_validate_buffer (
	struct acpi_buffer              *buffer)
{

	/* Obviously, the structure pointer must be valid */

	if (!buffer) {
		return (AE_BAD_PARAMETER);
	}

	/* Special semantics for the length */

	if ((buffer->length == ACPI_NO_BUFFER)              ||
		(buffer->length == ACPI_ALLOCATE_BUFFER)        ||
		(buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
		return (AE_OK);
	}

	/* Length is valid, the buffer pointer must be also */

	if (!buffer->pointer) {
		return (AE_BAD_PARAMETER);
	}

	return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_initialize_buffer
 *
 * PARAMETERS:  Buffer              - Buffer to be validated
 *              required_length     - Length needed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Validate that the buffer is of the required length or
 *              allocate a new buffer.  Returned buffer is always zeroed.
 *
 ******************************************************************************/

acpi_status
acpi_ut_initialize_buffer (
	struct acpi_buffer              *buffer,
	acpi_size                       required_length)
{
	acpi_status                     status = AE_OK;


	switch (buffer->length) {
	case ACPI_NO_BUFFER:

		/* Set the exception and returned the required length */

		status = AE_BUFFER_OVERFLOW;
		break;


	case ACPI_ALLOCATE_BUFFER:

		/* Allocate a new buffer */

		buffer->pointer = acpi_os_allocate (required_length);
		if (!buffer->pointer) {
			return (AE_NO_MEMORY);
		}

		/* Clear the buffer */

		ACPI_MEMSET (buffer->pointer, 0, required_length);
		break;


	case ACPI_ALLOCATE_LOCAL_BUFFER:

		/* Allocate a new buffer with local interface to allow tracking */

		buffer->pointer = ACPI_MEM_CALLOCATE (required_length);
		if (!buffer->pointer) {
			return (AE_NO_MEMORY);
		}
		break;


	default:

		/* Existing buffer: Validate the size of the buffer */

		if (buffer->length < required_length) {
			status = AE_BUFFER_OVERFLOW;
			break;
		}

		/* Clear the buffer */

		ACPI_MEMSET (buffer->pointer, 0, required_length);
		break;
	}

	buffer->length = required_length;
	return (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_allocate
 *
 * 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: The subsystem's equivalent of malloc.
 *
 ******************************************************************************/

void *
acpi_ut_allocate (
	acpi_size                       size,
	u32                             component,
	char                            *module,
	u32                             line)
{
	void                            *allocation;


	ACPI_FUNCTION_TRACE_U32 ("ut_allocate", size);


	/* Check for an inadvertent size of zero bytes */

	if (!size) {
		_ACPI_REPORT_ERROR (module, line, component,
				("ut_allocate: Attempt to allocate zero bytes\n"));
		size = 1;
	}

	allocation = acpi_os_allocate (size);
	if (!allocation) {
		/* Report allocation error */

		_ACPI_REPORT_ERROR (module, line, component,
				("ut_allocate: Could not allocate size %X\n", (u32) size));

		return_PTR (NULL);
	}

	return_PTR (allocation);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_callocate
 *
 * 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 (
	acpi_size                       size,
	u32                             component,
	char                            *module,
	u32                             line)
{
	void                            *allocation;


	ACPI_FUNCTION_TRACE_U32 ("ut_callocate", size);


	/* Check for an inadvertent size of zero bytes */

	if (!size) {
		_ACPI_REPORT_ERROR (module, line, component,
				("ut_callocate: Attempt to allocate zero bytes\n"));
		return_PTR (NULL);
	}

	allocation = acpi_os_allocate (size);
	if (!allocation) {
		/* Report allocation error */

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

	/* Clear the memory block */

	ACPI_MEMSET (allocation, 0, size);
	return_PTR (allocation);
}


#ifdef ACPI_DBG_TRACK_ALLOCATIONS
/*
 * These procedures are used for tracking memory leaks in the subsystem, and
 * they get compiled out when the ACPI_DBG_TRACK_ALLOCATIONS is not set.
 *
 * Each memory allocation is tracked via a doubly linked list.  Each
 * element contains the caller's component, module name, function name, and
 * line number.  acpi_ut_allocate and acpi_ut_callocate call
 * acpi_ut_track_allocation to add an element to the list; deletion
 * occurs in the body of acpi_ut_free.
 */

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_create_list
 *
 * PARAMETERS:  cache_name      - Ascii name for the cache
 *              object_size     - Size of each cached object
 *              return_cache    - Where the new cache object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a local memory list for tracking purposed
 *
 ******************************************************************************/

static acpi_status
acpi_ut_create_list (
	char                            *list_name,
	u16                             object_size,
	struct acpi_memory_list         **return_cache)
{
	struct acpi_memory_list         *cache;


	cache = acpi_os_allocate (sizeof (struct acpi_memory_list));
	if (!cache) {
		return (AE_NO_MEMORY);
	}

	ACPI_MEMSET (cache, 0, sizeof (struct acpi_memory_list));

	cache->list_name  = list_name;
	cache->object_size = object_size;

	*return_cache = cache;
	return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_allocate_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: The subsystem's equivalent of malloc.
 *
 ******************************************************************************/

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


	allocation = acpi_ut_allocate (size + sizeof (struct acpi_debug_mem_header),
			  component, module, line);
	if (!allocation) {
		return (NULL);
	}

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

	acpi_gbl_global_list->total_allocated++;
	acpi_gbl_global_list->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_header),
			  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 (allocation, size,
			   ACPI_MEM_CALLOC, component, module, line);
	if (ACPI_FAILURE (status)) {
		acpi_os_free (allocation);
		return (NULL);
	}

	acpi_gbl_global_list->total_allocated++;
	acpi_gbl_global_list->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_global_list->total_freed++;
	acpi_gbl_global_list->current_total_size -= debug_block->size;

	status = acpi_ut_remove_allocation (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.
 *
 ******************************************************************************/

static struct acpi_debug_mem_block *
acpi_ut_find_allocation (
	void                            *allocation)
{
	struct acpi_debug_mem_block     *element;


	ACPI_FUNCTION_ENTRY ();


	element = acpi_gbl_global_list->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.
 *
 ******************************************************************************/

static acpi_status
acpi_ut_track_allocation (
	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);


	mem_list = acpi_gbl_global_list;
	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 (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);
	allocation->module[ACPI_MAX_MODULE_NAME-1] = 0;

	/* 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.
 *
 ******************************************************************************/

static acpi_status
acpi_ut_remove_allocation (
	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");


	mem_list = acpi_gbl_global_list;
	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.
 *
 ******************************************************************************/

#ifdef ACPI_FUTURE_USAGE
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;
}
#endif  /*  ACPI_FUTURE_USAGE  */


/*******************************************************************************
 *
 * 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_global_list->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 */