Quelle  dbexec.c   Sprache: C

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
 *
 * Module Name: dbexec - debugger control method execution
 *
 ******************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acdebug.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_CA_DEBUGGER
ACPI_MODULE_NAME("dbexec")

static struct acpi_db_method_info acpi_gbl_db_method_info;

/* Local prototypes */

static acpi_status
acpi_db_execute_method(struct acpi_db_method_info *info,
         struct acpi_buffer *return_obj);

static acpi_status acpi_db_execute_setup(struct acpi_db_method_info *info);

static u32 acpi_db_get_outstanding_allocations(void);

static void ACPI_SYSTEM_XFACE acpi_db_method_thread(void *context);

static acpi_status
acpi_db_execution_walk(acpi_handle obj_handle,
         u32 nesting_level, void *context, void **return_value);

static void ACPI_SYSTEM_XFACE acpi_db_single_execution_thread(void *context);

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_delete_objects
 *
 * PARAMETERS:  count               - Count of objects in the list
 *              objects             - Array of ACPI_OBJECTs to be deleted
 *
 * RETURN:      None
 *
 * DESCRIPTION: Delete a list of ACPI_OBJECTS. Handles packages and nested
 *              packages via recursion.
 *
 ******************************************************************************/

void acpi_db_delete_objects(u32 count, union acpi_object *objects)
{
 u32 i;

 for (i = 0; i < count; i++) {
  switch (objects[i].type) {
  case ACPI_TYPE_BUFFER:

   ACPI_FREE(objects[i].buffer.pointer);
   break;

  case ACPI_TYPE_PACKAGE:

   /* Recursive call to delete package elements */

   acpi_db_delete_objects(objects[i].package.count,
            objects[i].package.elements);

   /* Free the elements array */

   ACPI_FREE(objects[i].package.elements);
   break;

  default:

   break;
  }
 }
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_execute_method
 *
 * PARAMETERS:  info            - Valid info segment
 *              return_obj      - Where to put return object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute a control method. Used to evaluate objects via the
 *              "EXECUTE" or "EVALUATE" commands.
 *
 ******************************************************************************/

static acpi_status
acpi_db_execute_method(struct acpi_db_method_info *info,
         struct acpi_buffer *return_obj)
{
 acpi_status status;
 struct acpi_object_list param_objects;
 union acpi_object params[ACPI_DEBUGGER_MAX_ARGS + 1];
 u32 i;

 ACPI_FUNCTION_TRACE(db_execute_method);

 if (acpi_gbl_db_output_to_file && !acpi_dbg_level) {
  acpi_os_printf("Warning: debug output is not enabled!\n");
 }

 param_objects.count = 0;
 param_objects.pointer = NULL;

 /* Pass through any command-line arguments */

 if (info->args && info->args[0]) {

  /* Get arguments passed on the command line */

  for (i = 0; (info->args[i] && *(info->args[i])); i++) {

   /* Convert input string (token) to an actual union acpi_object */

   status = acpi_db_convert_to_object(info->types[i],
          info->args[i],
          ¶ms[i]);
   if (ACPI_FAILURE(status)) {
    ACPI_EXCEPTION((AE_INFO, status,
      "While parsing method arguments"));
    goto cleanup;
   }
  }

  param_objects.count = i;
  param_objects.pointer = params;
 }

 /* Prepare for a return object of arbitrary size */

 return_obj->pointer = acpi_gbl_db_buffer;
 return_obj->length = ACPI_DEBUG_BUFFER_SIZE;

 /* Do the actual method execution */

 acpi_gbl_method_executing = TRUE;
 status = acpi_evaluate_object(NULL, info->pathname,
          ¶m_objects, return_obj);

 acpi_gbl_cm_single_step = FALSE;
 acpi_gbl_method_executing = FALSE;

 if (ACPI_FAILURE(status)) {
  if ((status == AE_ABORT_METHOD) || acpi_gbl_abort_method) {

   /* Clear the abort and fall back to the debugger prompt */

   ACPI_EXCEPTION((AE_INFO, status,
     "Aborting top-level method"));

   acpi_gbl_abort_method = FALSE;
   status = AE_OK;
   goto cleanup;
  }

  ACPI_EXCEPTION((AE_INFO, status,
    "while executing %s from AML Debugger",
    info->pathname));

  if (status == AE_BUFFER_OVERFLOW) {
   ACPI_ERROR((AE_INFO,
        "Possible buffer overflow within AML Debugger "
        "buffer (size 0x%X needed 0x%X)",
        ACPI_DEBUG_BUFFER_SIZE,
        (u32)return_obj->length));
  }
 }

cleanup:
 acpi_db_delete_objects(param_objects.count, params);
 return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_execute_setup
 *
 * PARAMETERS:  info            - Valid method info
 *
 * RETURN:      None
 *
 * DESCRIPTION: Setup info segment prior to method execution
 *
 ******************************************************************************/

static acpi_status acpi_db_execute_setup(struct acpi_db_method_info *info)
{
 acpi_status status;

 ACPI_FUNCTION_NAME(db_execute_setup);

 /* Concatenate the current scope to the supplied name */

 info->pathname[0] = 0;
 if ((info->name[0] != '\\') && (info->name[0] != '/')) {
  if (acpi_ut_safe_strcat(info->pathname, sizeof(info->pathname),
     acpi_gbl_db_scope_buf)) {
   status = AE_BUFFER_OVERFLOW;
   goto error_exit;
  }
 }

 if (acpi_ut_safe_strcat(info->pathname, sizeof(info->pathname),
    info->name)) {
  status = AE_BUFFER_OVERFLOW;
  goto error_exit;
 }

 acpi_db_prep_namestring(info->pathname);

 acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 acpi_os_printf("Evaluating %s\n", info->pathname);

 if (info->flags & EX_SINGLE_STEP) {
  acpi_gbl_cm_single_step = TRUE;
  acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
 }

 else {
  /* No single step, allow redirection to a file */

  acpi_db_set_output_destination(ACPI_DB_REDIRECTABLE_OUTPUT);
 }

 return (AE_OK);

error_exit:

 ACPI_EXCEPTION((AE_INFO, status, "During setup for method execution"));
 return (status);
}

#ifdef ACPI_DBG_TRACK_ALLOCATIONS
u32 acpi_db_get_cache_info(struct acpi_memory_list *cache)
{

 return (cache->total_allocated - cache->total_freed -
  cache->current_depth);
}
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_get_outstanding_allocations
 *
 * PARAMETERS:  None
 *
 * RETURN:      Current global allocation count minus cache entries
 *
 * DESCRIPTION: Determine the current number of "outstanding" allocations --
 *              those allocations that have not been freed and also are not
 *              in one of the various object caches.
 *
 ******************************************************************************/

static u32 acpi_db_get_outstanding_allocations(void)
{
 u32 outstanding = 0;

#ifdef ACPI_DBG_TRACK_ALLOCATIONS

 outstanding += acpi_db_get_cache_info(acpi_gbl_state_cache);
 outstanding += acpi_db_get_cache_info(acpi_gbl_ps_node_cache);
 outstanding += acpi_db_get_cache_info(acpi_gbl_ps_node_ext_cache);
 outstanding += acpi_db_get_cache_info(acpi_gbl_operand_cache);
#endif

 return (outstanding);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_execution_walk
 *
 * PARAMETERS:  WALK_CALLBACK
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Execute a control method. Name is relative to the current
 *              scope.
 *
 ******************************************************************************/

static acpi_status
acpi_db_execution_walk(acpi_handle obj_handle,
         u32 nesting_level, void *context, void **return_value)
{
 union acpi_operand_object *obj_desc;
 struct acpi_namespace_node *node =
     (struct acpi_namespace_node *)obj_handle;
 struct acpi_buffer return_obj;
 acpi_status status;

 obj_desc = acpi_ns_get_attached_object(node);
 if (obj_desc->method.param_count) {
  return (AE_OK);
 }

 return_obj.pointer = NULL;
 return_obj.length = ACPI_ALLOCATE_BUFFER;

 acpi_ns_print_node_pathname(node, "Evaluating");

 /* Do the actual method execution */

 acpi_os_printf("\n");
 acpi_gbl_method_executing = TRUE;

 status = acpi_evaluate_object(node, NULL, NULL, &return_obj);

 acpi_gbl_method_executing = FALSE;

 acpi_os_printf("Evaluation of [%4.4s] returned %s\n",
         acpi_ut_get_node_name(node),
         acpi_format_exception(status));

 return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_execute
 *
 * PARAMETERS:  name                - Name of method to execute
 *              args                - Parameters to the method
 *              Types               -
 *              flags               - single step/no single step
 *
 * RETURN:      None
 *
 * DESCRIPTION: Execute a control method. Name is relative to the current
 *              scope. Function used for the "EXECUTE", "EVALUATE", and
 *              "ALL" commands
 *
 ******************************************************************************/

void
acpi_db_execute(char *name, char **args, acpi_object_type *types, u32 flags)
{
 acpi_status status;
 struct acpi_buffer return_obj;
 char *name_string;

#ifdef ACPI_DEBUG_OUTPUT
 u32 previous_allocations;
 u32 allocations;
#endif

 /*
 * Allow one execution to be performed by debugger or single step
 * execution will be dead locked by the interpreter mutexes.
 */
 if (acpi_gbl_method_executing) {
  acpi_os_printf("Only one debugger execution is allowed.\n");
  return;
 }
#ifdef ACPI_DEBUG_OUTPUT
 /* Memory allocation tracking */

 previous_allocations = acpi_db_get_outstanding_allocations();
#endif

 if (*name == '*') {
  (void)acpi_walk_namespace(ACPI_TYPE_METHOD, ACPI_ROOT_OBJECT,
       ACPI_UINT32_MAX,
       acpi_db_execution_walk, NULL, NULL,
       NULL);
  return;
 }

 if ((flags & EX_ALL) && (strlen(name) > 4)) {
  acpi_os_printf("Input name (%s) must be a 4-char NameSeg\n",
          name);
  return;
 }

 name_string = ACPI_ALLOCATE(strlen(name) + 1);
 if (!name_string) {
  return;
 }

 memset(&acpi_gbl_db_method_info, 0, sizeof(struct acpi_db_method_info));
 strcpy(name_string, name);
 acpi_ut_strupr(name_string);

 /* Subcommand to Execute all predefined names in the namespace */

 if (!strncmp(name_string, "PREDEF", 6)) {
  acpi_db_evaluate_predefined_names();
  ACPI_FREE(name_string);
  return;
 }

 /* Command (ALL <nameseg>) to execute all methods of a particular name */

 else if (flags & EX_ALL) {
  acpi_gbl_db_method_info.name = name_string;
  return_obj.pointer = NULL;
  return_obj.length = ACPI_ALLOCATE_BUFFER;
  acpi_db_evaluate_all(name_string);
  ACPI_FREE(name_string);
  return;
 } else {
  acpi_gbl_db_method_info.name = name_string;
  acpi_gbl_db_method_info.args = args;
  acpi_gbl_db_method_info.types = types;
  acpi_gbl_db_method_info.flags = flags;

  return_obj.pointer = NULL;
  return_obj.length = ACPI_ALLOCATE_BUFFER;
 }

 status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 if (ACPI_FAILURE(status)) {
  ACPI_FREE(name_string);
  return;
 }

 /* Get the NS node, determines existence also */

 status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
     &acpi_gbl_db_method_info.method);
 if (ACPI_SUCCESS(status)) {
  status = acpi_db_execute_method(&acpi_gbl_db_method_info,
      &return_obj);
 }
 ACPI_FREE(name_string);

 /*
 * Allow any handlers in separate threads to complete.
 * (Such as Notify handlers invoked from AML executed above).
 */
 acpi_os_sleep((u64)10);

#ifdef ACPI_DEBUG_OUTPUT

 /* Memory allocation tracking */

 allocations =
     acpi_db_get_outstanding_allocations() - previous_allocations;

 acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);

 if (allocations > 0) {
  acpi_os_printf
      ("0x%X Outstanding allocations after evaluation of %s\n",
       allocations, acpi_gbl_db_method_info.pathname);
 }
#endif

 if (ACPI_FAILURE(status)) {
  acpi_os_printf("Evaluation of %s failed with status %s\n",
          acpi_gbl_db_method_info.pathname,
          acpi_format_exception(status));
 } else {
  /* Display a return object, if any */

  if (return_obj.length) {
   acpi_os_printf("Evaluation of %s returned object %p, "
           "external buffer length %X\n",
           acpi_gbl_db_method_info.pathname,
           return_obj.pointer,
           (u32)return_obj.length);

   acpi_db_dump_external_object(return_obj.pointer, 1);
   acpi_os_printf("\n");

   /* Dump a _PLD buffer if present */

   if (ACPI_COMPARE_NAMESEG
       ((ACPI_CAST_PTR
         (struct acpi_namespace_node,
          acpi_gbl_db_method_info.method)->name.ascii),
        METHOD_NAME__PLD)) {
    acpi_db_dump_pld_buffer(return_obj.pointer);
   }
  } else {
   acpi_os_printf
       ("No object was returned from evaluation of %s\n",
        acpi_gbl_db_method_info.pathname);
  }
 }

 acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_method_thread
 *
 * PARAMETERS:  context             - Execution info segment
 *
 * RETURN:      None
 *
 * DESCRIPTION: Debugger execute thread. Waits for a command line, then
 *              simply dispatches it.
 *
 ******************************************************************************/

static void ACPI_SYSTEM_XFACE acpi_db_method_thread(void *context)
{
 acpi_status status;
 struct acpi_db_method_info *info = context;
 struct acpi_db_method_info local_info;
 u32 i;
 u8 allow;
 struct acpi_buffer return_obj;

 /*
 * acpi_gbl_db_method_info.Arguments will be passed as method arguments.
 * Prevent acpi_gbl_db_method_info from being modified by multiple threads
 * concurrently.
 *
 * Note: The arguments we are passing are used by the ASL test suite
 * (aslts). Do not change them without updating the tests.
 */
 (void)acpi_os_wait_semaphore(info->info_gate, 1, ACPI_WAIT_FOREVER);

 if (info->init_args) {
  acpi_db_uint32_to_hex_string(info->num_created,
          info->index_of_thread_str);
  acpi_db_uint32_to_hex_string((u32)acpi_os_get_thread_id(),
          info->id_of_thread_str);
 }

 if (info->threads && (info->num_created < info->num_threads)) {
  info->threads[info->num_created++] = acpi_os_get_thread_id();
 }

 local_info = *info;
 local_info.args = local_info.arguments;
 local_info.arguments[0] = local_info.num_threads_str;
 local_info.arguments[1] = local_info.id_of_thread_str;
 local_info.arguments[2] = local_info.index_of_thread_str;
 local_info.arguments[3] = NULL;

 local_info.types = local_info.arg_types;

 (void)acpi_os_signal_semaphore(info->info_gate, 1);

 for (i = 0; i < info->num_loops; i++) {
  status = acpi_db_execute_method(&local_info, &return_obj);
  if (ACPI_FAILURE(status)) {
   acpi_os_printf
       ("%s During evaluation of %s at iteration %X\n",
        acpi_format_exception(status), info->pathname, i);
   if (status == AE_ABORT_METHOD) {
    break;
   }
  }
#if 0
  if ((i % 100) == 0) {
   acpi_os_printf("%u loops, Thread 0x%x\n",
           i, acpi_os_get_thread_id());
  }

  if (return_obj.length) {
   acpi_os_printf
       ("Evaluation of %s returned object %p Buflen %X\n",
        info->pathname, return_obj.pointer,
        (u32)return_obj.length);
   acpi_db_dump_external_object(return_obj.pointer, 1);
  }
#endif
 }

 /* Signal our completion */

 allow = 0;
 (void)acpi_os_wait_semaphore(info->thread_complete_gate,
         1, ACPI_WAIT_FOREVER);
 info->num_completed++;

 if (info->num_completed == info->num_threads) {

  /* Do signal for main thread once only */
  allow = 1;
 }

 (void)acpi_os_signal_semaphore(info->thread_complete_gate, 1);

 if (allow) {
  status = acpi_os_signal_semaphore(info->main_thread_gate, 1);
  if (ACPI_FAILURE(status)) {
   acpi_os_printf
       ("Could not signal debugger thread sync semaphore, %s\n",
        acpi_format_exception(status));
  }
 }
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_single_execution_thread
 *
 * PARAMETERS:  context                 - Method info struct
 *
 * RETURN:      None
 *
 * DESCRIPTION: Create one thread and execute a method
 *
 ******************************************************************************/

static void ACPI_SYSTEM_XFACE acpi_db_single_execution_thread(void *context)
{
 struct acpi_db_method_info *info = context;
 acpi_status status;
 struct acpi_buffer return_obj;

 acpi_os_printf("\n");

 status = acpi_db_execute_method(info, &return_obj);
 if (ACPI_FAILURE(status)) {
  acpi_os_printf("%s During evaluation of %s\n",
          acpi_format_exception(status), info->pathname);
  return;
 }

 /* Display a return object, if any */

 if (return_obj.length) {
  acpi_os_printf("Evaluation of %s returned object %p, "
          "external buffer length %X\n",
          acpi_gbl_db_method_info.pathname,
          return_obj.pointer, (u32)return_obj.length);

  acpi_db_dump_external_object(return_obj.pointer, 1);
 }

 acpi_os_printf("\nBackground thread completed\n%c ",
         ACPI_DEBUGGER_COMMAND_PROMPT);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_create_execution_thread
 *
 * PARAMETERS:  method_name_arg         - Control method to execute
 *              arguments               - Array of arguments to the method
 *              types                   - Corresponding array of object types
 *
 * RETURN:      None
 *
 * DESCRIPTION: Create a single thread to evaluate a namespace object. Handles
 *              arguments passed on command line for control methods.
 *
 ******************************************************************************/

void
acpi_db_create_execution_thread(char *method_name_arg,
    char **arguments, acpi_object_type *types)
{
 acpi_status status;
 u32 i;

 memset(&acpi_gbl_db_method_info, 0, sizeof(struct acpi_db_method_info));
 acpi_gbl_db_method_info.name = method_name_arg;
 acpi_gbl_db_method_info.init_args = 1;
 acpi_gbl_db_method_info.args = acpi_gbl_db_method_info.arguments;
 acpi_gbl_db_method_info.types = acpi_gbl_db_method_info.arg_types;

 /* Setup method arguments, up to 7 (0-6) */

 for (i = 0; (i < ACPI_METHOD_NUM_ARGS) && *arguments; i++) {
  acpi_gbl_db_method_info.arguments[i] = *arguments;
  arguments++;

  acpi_gbl_db_method_info.arg_types[i] = *types;
  types++;
 }

 status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 if (ACPI_FAILURE(status)) {
  return;
 }

 /* Get the NS node, determines existence also */

 status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
     &acpi_gbl_db_method_info.method);
 if (ACPI_FAILURE(status)) {
  acpi_os_printf("%s Could not get handle for %s\n",
          acpi_format_exception(status),
          acpi_gbl_db_method_info.pathname);
  return;
 }

 status = acpi_os_execute(OSL_DEBUGGER_EXEC_THREAD,
     acpi_db_single_execution_thread,
     &acpi_gbl_db_method_info);
 if (ACPI_FAILURE(status)) {
  return;
 }

 acpi_os_printf("\nBackground thread started\n");
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_create_execution_threads
 *
 * PARAMETERS:  num_threads_arg         - Number of threads to create
 *              num_loops_arg           - Loop count for the thread(s)
 *              method_name_arg         - Control method to execute
 *
 * RETURN:      None
 *
 * DESCRIPTION: Create threads to execute method(s)
 *
 ******************************************************************************/

void
acpi_db_create_execution_threads(char *num_threads_arg,
     char *num_loops_arg, char *method_name_arg)
{
 acpi_status status;
 u32 num_threads;
 u32 num_loops;
 u32 i;
 u32 size;
 acpi_mutex main_thread_gate;
 acpi_mutex thread_complete_gate;
 acpi_mutex info_gate;

 /* Get the arguments */

 num_threads = strtoul(num_threads_arg, NULL, 0);
 num_loops = strtoul(num_loops_arg, NULL, 0);

 if (!num_threads || !num_loops) {
  acpi_os_printf("Bad argument: Threads %X, Loops %X\n",
          num_threads, num_loops);
  return;
 }

 /*
 * Create the semaphore for synchronization of
 * the created threads with the main thread.
 */
 status = acpi_os_create_semaphore(1, 0, &main_thread_gate);
 if (ACPI_FAILURE(status)) {
  acpi_os_printf("Could not create semaphore for "
          "synchronization with the main thread, %s\n",
          acpi_format_exception(status));
  return;
 }

 /*
 * Create the semaphore for synchronization
 * between the created threads.
 */
 status = acpi_os_create_semaphore(1, 1, &thread_complete_gate);
 if (ACPI_FAILURE(status)) {
  acpi_os_printf("Could not create semaphore for "
          "synchronization between the created threads, %s\n",
          acpi_format_exception(status));

  (void)acpi_os_delete_semaphore(main_thread_gate);
  return;
 }

 status = acpi_os_create_semaphore(1, 1, &info_gate);
 if (ACPI_FAILURE(status)) {
  acpi_os_printf("Could not create semaphore for "
          "synchronization of AcpiGbl_DbMethodInfo, %s\n",
          acpi_format_exception(status));

  (void)acpi_os_delete_semaphore(thread_complete_gate);
  (void)acpi_os_delete_semaphore(main_thread_gate);
  return;
 }

 memset(&acpi_gbl_db_method_info, 0, sizeof(struct acpi_db_method_info));

 /* Array to store IDs of threads */

 acpi_gbl_db_method_info.num_threads = num_threads;
 size = sizeof(acpi_thread_id) * acpi_gbl_db_method_info.num_threads;

 acpi_gbl_db_method_info.threads = acpi_os_allocate(size);
 if (acpi_gbl_db_method_info.threads == NULL) {
  acpi_os_printf("No memory for thread IDs array\n");
  (void)acpi_os_delete_semaphore(main_thread_gate);
  (void)acpi_os_delete_semaphore(thread_complete_gate);
  (void)acpi_os_delete_semaphore(info_gate);
  return;
 }
 memset(acpi_gbl_db_method_info.threads, 0, size);

 /* Setup the context to be passed to each thread */

 acpi_gbl_db_method_info.name = method_name_arg;
 acpi_gbl_db_method_info.flags = 0;
 acpi_gbl_db_method_info.num_loops = num_loops;
 acpi_gbl_db_method_info.main_thread_gate = main_thread_gate;
 acpi_gbl_db_method_info.thread_complete_gate = thread_complete_gate;
 acpi_gbl_db_method_info.info_gate = info_gate;

 /* Init arguments to be passed to method */

 acpi_gbl_db_method_info.init_args = 1;
 acpi_gbl_db_method_info.args = acpi_gbl_db_method_info.arguments;
 acpi_gbl_db_method_info.arguments[0] =
     acpi_gbl_db_method_info.num_threads_str;
 acpi_gbl_db_method_info.arguments[1] =
     acpi_gbl_db_method_info.id_of_thread_str;
 acpi_gbl_db_method_info.arguments[2] =
     acpi_gbl_db_method_info.index_of_thread_str;
 acpi_gbl_db_method_info.arguments[3] = NULL;

 acpi_gbl_db_method_info.types = acpi_gbl_db_method_info.arg_types;
 acpi_gbl_db_method_info.arg_types[0] = ACPI_TYPE_INTEGER;
 acpi_gbl_db_method_info.arg_types[1] = ACPI_TYPE_INTEGER;
 acpi_gbl_db_method_info.arg_types[2] = ACPI_TYPE_INTEGER;

 acpi_db_uint32_to_hex_string(num_threads,
         acpi_gbl_db_method_info.num_threads_str);

 status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 if (ACPI_FAILURE(status)) {
  goto cleanup_and_exit;
 }

 /* Get the NS node, determines existence also */

 status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
     &acpi_gbl_db_method_info.method);
 if (ACPI_FAILURE(status)) {
  acpi_os_printf("%s Could not get handle for %s\n",
          acpi_format_exception(status),
          acpi_gbl_db_method_info.pathname);
  goto cleanup_and_exit;
 }

 /* Create the threads */

 acpi_os_printf("Creating %X threads to execute %X times each\n",
         num_threads, num_loops);

 for (i = 0; i < (num_threads); i++) {
  status =
      acpi_os_execute(OSL_DEBUGGER_EXEC_THREAD,
        acpi_db_method_thread,
        &acpi_gbl_db_method_info);
  if (ACPI_FAILURE(status)) {
   break;
  }
 }

 /* Wait for all threads to complete */

 (void)acpi_os_wait_semaphore(main_thread_gate, 1, ACPI_WAIT_FOREVER);

 acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 acpi_os_printf("All threads (%X) have completed\n", num_threads);
 acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);

cleanup_and_exit:

 /* Cleanup and exit */

 (void)acpi_os_delete_semaphore(main_thread_gate);
 (void)acpi_os_delete_semaphore(thread_complete_gate);
 (void)acpi_os_delete_semaphore(info_gate);

 acpi_os_free(acpi_gbl_db_method_info.threads);
 acpi_gbl_db_method_info.threads = NULL;
}