drivers/acpi/acpica/dbexec.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: dbexec - debugger control method execution
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acdebug.h"
  47 #include "acnamesp.h"
  48
  49 #define _COMPONENT          ACPI_CA_DEBUGGER
  50 ACPI_MODULE_NAME("dbexec")
  51
  52 static struct acpi_db_method_info acpi_gbl_db_method_info;
  53
  54 /* Local prototypes */
  55
  56 static acpi_status
  57 acpi_db_execute_method(struct acpi_db_method_info *info,
  58                        struct acpi_buffer *return_obj);
  59
  60 static acpi_status acpi_db_execute_setup(struct acpi_db_method_info *info);
  61
  62 static u32 acpi_db_get_outstanding_allocations(void);
  63
  64 static void ACPI_SYSTEM_XFACE acpi_db_method_thread(void *context);
  65
  66 static acpi_status
  67 acpi_db_execution_walk(acpi_handle obj_handle,
  68                        u32 nesting_level, void *context, void **return_value);
  69
  70 /*******************************************************************************
  71  *
  72  * FUNCTION:    acpi_db_delete_objects
  73  *
  74  * PARAMETERS:  count               - Count of objects in the list
  75  *              objects             - Array of ACPI_OBJECTs to be deleted
  76  *
  77  * RETURN:      None
  78  *
  79  * DESCRIPTION: Delete a list of ACPI_OBJECTS. Handles packages and nested
  80  *              packages via recursion.
  81  *
  82  ******************************************************************************/
  83
  84 void acpi_db_delete_objects(u32 count, union acpi_object *objects)
  85 {
  86         u32 i;
  87
  88         for (i = 0; i < count; i++) {
  89                 switch (objects[i].type) {
  90                 case ACPI_TYPE_BUFFER:
  91
  92                         ACPI_FREE(objects[i].buffer.pointer);
  93                         break;
  94
  95                 case ACPI_TYPE_PACKAGE:
  96
  97                         /* Recursive call to delete package elements */
  98
  99                         acpi_db_delete_objects(objects[i].package.count,
 100                                                objects[i].package.elements);
 101
 102                         /* Free the elements array */
 103
 104                         ACPI_FREE(objects[i].package.elements);
 105                         break;
 106
 107                 default:
 108
 109                         break;
 110                 }
 111         }
 112 }
 113
 114 /*******************************************************************************
 115  *
 116  * FUNCTION:    acpi_db_execute_method
 117  *
 118  * PARAMETERS:  info            - Valid info segment
 119  *              return_obj      - Where to put return object
 120  *
 121  * RETURN:      Status
 122  *
 123  * DESCRIPTION: Execute a control method.
 124  *
 125  ******************************************************************************/
 126
 127 static acpi_status
 128 acpi_db_execute_method(struct acpi_db_method_info *info,
 129                        struct acpi_buffer *return_obj)
 130 {
 131         acpi_status status;
 132         struct acpi_object_list param_objects;
 133         union acpi_object params[ACPI_DEBUGGER_MAX_ARGS + 1];
 134         u32 i;
 135
 136         ACPI_FUNCTION_TRACE(db_execute_method);
 137
 138         if (acpi_gbl_db_output_to_file && !acpi_dbg_level) {
 139                 acpi_os_printf("Warning: debug output is not enabled!\n");
 140         }
 141
 142         param_objects.count = 0;
 143         param_objects.pointer = NULL;
 144
 145         /* Pass through any command-line arguments */
 146
 147         if (info->args && info->args[0]) {
 148
 149                 /* Get arguments passed on the command line */
 150
 151                 for (i = 0; (info->args[i] && *(info->args[i])); i++) {
 152
 153                         /* Convert input string (token) to an actual union acpi_object */
 154
 155                         status = acpi_db_convert_to_object(info->types[i],
 156                                                            info->args[i],
 157                                                            &params[i]);
 158                         if (ACPI_FAILURE(status)) {
 159                                 ACPI_EXCEPTION((AE_INFO, status,
 160                                                 "While parsing method arguments"));
 161                                 goto cleanup;
 162                         }
 163                 }
 164
 165                 param_objects.count = i;
 166                 param_objects.pointer = params;
 167         }
 168
 169         /* Prepare for a return object of arbitrary size */
 170
 171         return_obj->pointer = acpi_gbl_db_buffer;
 172         return_obj->length = ACPI_DEBUG_BUFFER_SIZE;
 173
 174         /* Do the actual method execution */
 175
 176         acpi_gbl_method_executing = TRUE;
 177         status = acpi_evaluate_object(NULL, info->pathname,
 178                                       &param_objects, return_obj);
 179
 180         acpi_gbl_cm_single_step = FALSE;
 181         acpi_gbl_method_executing = FALSE;
 182
 183         if (ACPI_FAILURE(status)) {
 184                 ACPI_EXCEPTION((AE_INFO, status,
 185                                 "while executing %s from debugger",
 186                                 info->pathname));
 187
 188                 if (status == AE_BUFFER_OVERFLOW) {
 189                         ACPI_ERROR((AE_INFO,
 190                                     "Possible overflow of internal debugger "
 191                                     "buffer (size 0x%X needed 0x%X)",
 192                                     ACPI_DEBUG_BUFFER_SIZE,
 193                                     (u32)return_obj->length));
 194                 }
 195         }
 196
 197 cleanup:
 198         acpi_db_delete_objects(param_objects.count, params);
 199         return_ACPI_STATUS(status);
 200 }
 201
 202 /*******************************************************************************
 203  *
 204  * FUNCTION:    acpi_db_execute_setup
 205  *
 206  * PARAMETERS:  info            - Valid method info
 207  *
 208  * RETURN:      None
 209  *
 210  * DESCRIPTION: Setup info segment prior to method execution
 211  *
 212  ******************************************************************************/
 213
 214 static acpi_status acpi_db_execute_setup(struct acpi_db_method_info *info)
 215 {
 216         acpi_status status;
 217
 218         ACPI_FUNCTION_NAME(db_execute_setup);
 219
 220         /* Catenate the current scope to the supplied name */
 221
 222         info->pathname[0] = 0;
 223         if ((info->name[0] != '\\') && (info->name[0] != '/')) {
 224                 if (acpi_ut_safe_strcat(info->pathname, sizeof(info->pathname),
 225                                         acpi_gbl_db_scope_buf)) {
 226                         status = AE_BUFFER_OVERFLOW;
 227                         goto error_exit;
 228                 }
 229         }
 230
 231         if (acpi_ut_safe_strcat(info->pathname, sizeof(info->pathname),
 232                                 info->name)) {
 233                 status = AE_BUFFER_OVERFLOW;
 234                 goto error_exit;
 235         }
 236
 237         acpi_db_prep_namestring(info->pathname);
 238
 239         acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 240         acpi_os_printf("Evaluating %s\n", info->pathname);
 241
 242         if (info->flags & EX_SINGLE_STEP) {
 243                 acpi_gbl_cm_single_step = TRUE;
 244                 acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
 245         }
 246
 247         else {
 248                 /* No single step, allow redirection to a file */
 249
 250                 acpi_db_set_output_destination(ACPI_DB_REDIRECTABLE_OUTPUT);
 251         }
 252
 253         return (AE_OK);
 254
 255 error_exit:
 256
 257         ACPI_EXCEPTION((AE_INFO, status, "During setup for method execution"));
 258         return (status);
 259 }
 260
 261 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 262 u32 acpi_db_get_cache_info(struct acpi_memory_list *cache)
 263 {
 264
 265         return (cache->total_allocated - cache->total_freed -
 266                 cache->current_depth);
 267 }
 268 #endif
 269
 270 /*******************************************************************************
 271  *
 272  * FUNCTION:    acpi_db_get_outstanding_allocations
 273  *
 274  * PARAMETERS:  None
 275  *
 276  * RETURN:      Current global allocation count minus cache entries
 277  *
 278  * DESCRIPTION: Determine the current number of "outstanding" allocations --
 279  *              those allocations that have not been freed and also are not
 280  *              in one of the various object caches.
 281  *
 282  ******************************************************************************/
 283
 284 static u32 acpi_db_get_outstanding_allocations(void)
 285 {
 286         u32 outstanding = 0;
 287
 288 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 289
 290         outstanding += acpi_db_get_cache_info(acpi_gbl_state_cache);
 291         outstanding += acpi_db_get_cache_info(acpi_gbl_ps_node_cache);
 292         outstanding += acpi_db_get_cache_info(acpi_gbl_ps_node_ext_cache);
 293         outstanding += acpi_db_get_cache_info(acpi_gbl_operand_cache);
 294 #endif
 295
 296         return (outstanding);
 297 }
 298
 299 /*******************************************************************************
 300  *
 301  * FUNCTION:    acpi_db_execution_walk
 302  *
 303  * PARAMETERS:  WALK_CALLBACK
 304  *
 305  * RETURN:      Status
 306  *
 307  * DESCRIPTION: Execute a control method. Name is relative to the current
 308  *              scope.
 309  *
 310  ******************************************************************************/
 311
 312 static acpi_status
 313 acpi_db_execution_walk(acpi_handle obj_handle,
 314                        u32 nesting_level, void *context, void **return_value)
 315 {
 316         union acpi_operand_object *obj_desc;
 317         struct acpi_namespace_node *node =
 318             (struct acpi_namespace_node *)obj_handle;
 319         struct acpi_buffer return_obj;
 320         acpi_status status;
 321
 322         obj_desc = acpi_ns_get_attached_object(node);
 323         if (obj_desc->method.param_count) {
 324                 return (AE_OK);
 325         }
 326
 327         return_obj.pointer = NULL;
 328         return_obj.length = ACPI_ALLOCATE_BUFFER;
 329
 330         acpi_ns_print_node_pathname(node, "Evaluating");
 331
 332         /* Do the actual method execution */
 333
 334         acpi_os_printf("\n");
 335         acpi_gbl_method_executing = TRUE;
 336
 337         status = acpi_evaluate_object(node, NULL, NULL, &return_obj);
 338
 339         acpi_os_printf("Evaluation of [%4.4s] returned %s\n",
 340                        acpi_ut_get_node_name(node),
 341                        acpi_format_exception(status));
 342
 343         acpi_gbl_method_executing = FALSE;
 344         return (AE_OK);
 345 }
 346
 347 /*******************************************************************************
 348  *
 349  * FUNCTION:    acpi_db_execute
 350  *
 351  * PARAMETERS:  name                - Name of method to execute
 352  *              args                - Parameters to the method
 353  *              Types               -
 354  *              flags               - single step/no single step
 355  *
 356  * RETURN:      None
 357  *
 358  * DESCRIPTION: Execute a control method. Name is relative to the current
 359  *              scope.
 360  *
 361  ******************************************************************************/
 362
 363 void
 364 acpi_db_execute(char *name, char **args, acpi_object_type * types, u32 flags)
 365 {
 366         acpi_status status;
 367         struct acpi_buffer return_obj;
 368         char *name_string;
 369
 370 #ifdef ACPI_DEBUG_OUTPUT
 371         u32 previous_allocations;
 372         u32 allocations;
 373
 374         /* Memory allocation tracking */
 375
 376         previous_allocations = acpi_db_get_outstanding_allocations();
 377 #endif
 378
 379         if (*name == '*') {
 380                 (void)acpi_walk_namespace(ACPI_TYPE_METHOD, ACPI_ROOT_OBJECT,
 381                                           ACPI_UINT32_MAX,
 382                                           acpi_db_execution_walk, NULL, NULL,
 383                                           NULL);
 384                 return;
 385         } else {
 386                 name_string = ACPI_ALLOCATE(strlen(name) + 1);
 387                 if (!name_string) {
 388                         return;
 389                 }
 390
 391                 memset(&acpi_gbl_db_method_info, 0,
 392                        sizeof(struct acpi_db_method_info));
 393
 394                 strcpy(name_string, name);
 395                 acpi_ut_strupr(name_string);
 396                 acpi_gbl_db_method_info.name = name_string;
 397                 acpi_gbl_db_method_info.args = args;
 398                 acpi_gbl_db_method_info.types = types;
 399                 acpi_gbl_db_method_info.flags = flags;
 400
 401                 return_obj.pointer = NULL;
 402                 return_obj.length = ACPI_ALLOCATE_BUFFER;
 403
 404                 status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 405                 if (ACPI_FAILURE(status)) {
 406                         ACPI_FREE(name_string);
 407                         return;
 408                 }
 409
 410                 /* Get the NS node, determines existence also */
 411
 412                 status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
 413                                          &acpi_gbl_db_method_info.method);
 414                 if (ACPI_SUCCESS(status)) {
 415                         status =
 416                             acpi_db_execute_method(&acpi_gbl_db_method_info,
 417                                                    &return_obj);
 418                 }
 419                 ACPI_FREE(name_string);
 420         }
 421
 422         /*
 423          * Allow any handlers in separate threads to complete.
 424          * (Such as Notify handlers invoked from AML executed above).
 425          */
 426         acpi_os_sleep((u64)10);
 427
 428 #ifdef ACPI_DEBUG_OUTPUT
 429
 430         /* Memory allocation tracking */
 431
 432         allocations =
 433             acpi_db_get_outstanding_allocations() - previous_allocations;
 434
 435         acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 436
 437         if (allocations > 0) {
 438                 acpi_os_printf
 439                     ("0x%X Outstanding allocations after evaluation of %s\n",
 440                      allocations, acpi_gbl_db_method_info.pathname);
 441         }
 442 #endif
 443
 444         if (ACPI_FAILURE(status)) {
 445                 acpi_os_printf("Evaluation of %s failed with status %s\n",
 446                                acpi_gbl_db_method_info.pathname,
 447                                acpi_format_exception(status));
 448         } else {
 449                 /* Display a return object, if any */
 450
 451                 if (return_obj.length) {
 452                         acpi_os_printf("Evaluation of %s returned object %p, "
 453                                        "external buffer length %X\n",
 454                                        acpi_gbl_db_method_info.pathname,
 455                                        return_obj.pointer,
 456                                        (u32)return_obj.length);
 457
 458                         acpi_db_dump_external_object(return_obj.pointer, 1);
 459
 460                         /* Dump a _PLD buffer if present */
 461
 462                         if (ACPI_COMPARE_NAME
 463                             ((ACPI_CAST_PTR
 464                               (struct acpi_namespace_node,
 465                                acpi_gbl_db_method_info.method)->name.ascii),
 466                              METHOD_NAME__PLD)) {
 467                                 acpi_db_dump_pld_buffer(return_obj.pointer);
 468                         }
 469                 } else {
 470                         acpi_os_printf
 471                             ("No object was returned from evaluation of %s\n",
 472                              acpi_gbl_db_method_info.pathname);
 473                 }
 474         }
 475
 476         acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
 477 }
 478
 479 /*******************************************************************************
 480  *
 481  * FUNCTION:    acpi_db_method_thread
 482  *
 483  * PARAMETERS:  context             - Execution info segment
 484  *
 485  * RETURN:      None
 486  *
 487  * DESCRIPTION: Debugger execute thread. Waits for a command line, then
 488  *              simply dispatches it.
 489  *
 490  ******************************************************************************/
 491
 492 static void ACPI_SYSTEM_XFACE acpi_db_method_thread(void *context)
 493 {
 494         acpi_status status;
 495         struct acpi_db_method_info *info = context;
 496         struct acpi_db_method_info local_info;
 497         u32 i;
 498         u8 allow;
 499         struct acpi_buffer return_obj;
 500
 501         /*
 502          * acpi_gbl_db_method_info.Arguments will be passed as method arguments.
 503          * Prevent acpi_gbl_db_method_info from being modified by multiple threads
 504          * concurrently.
 505          *
 506          * Note: The arguments we are passing are used by the ASL test suite
 507          * (aslts). Do not change them without updating the tests.
 508          */
 509         (void)acpi_os_wait_semaphore(info->info_gate, 1, ACPI_WAIT_FOREVER);
 510
 511         if (info->init_args) {
 512                 acpi_db_uint32_to_hex_string(info->num_created,
 513                                              info->index_of_thread_str);
 514                 acpi_db_uint32_to_hex_string((u32)acpi_os_get_thread_id(),
 515                                              info->id_of_thread_str);
 516         }
 517
 518         if (info->threads && (info->num_created < info->num_threads)) {
 519                 info->threads[info->num_created++] = acpi_os_get_thread_id();
 520         }
 521
 522         local_info = *info;
 523         local_info.args = local_info.arguments;
 524         local_info.arguments[0] = local_info.num_threads_str;
 525         local_info.arguments[1] = local_info.id_of_thread_str;
 526         local_info.arguments[2] = local_info.index_of_thread_str;
 527         local_info.arguments[3] = NULL;
 528
 529         local_info.types = local_info.arg_types;
 530
 531         (void)acpi_os_signal_semaphore(info->info_gate, 1);
 532
 533         for (i = 0; i < info->num_loops; i++) {
 534                 status = acpi_db_execute_method(&local_info, &return_obj);
 535                 if (ACPI_FAILURE(status)) {
 536                         acpi_os_printf
 537                             ("%s During evaluation of %s at iteration %X\n",
 538                              acpi_format_exception(status), info->pathname, i);
 539                         if (status == AE_ABORT_METHOD) {
 540                                 break;
 541                         }
 542                 }
 543 #if 0
 544                 if ((i % 100) == 0) {
 545                         acpi_os_printf("%u loops, Thread 0x%x\n",
 546                                        i, acpi_os_get_thread_id());
 547                 }
 548
 549                 if (return_obj.length) {
 550                         acpi_os_printf
 551                             ("Evaluation of %s returned object %p Buflen %X\n",
 552                              info->pathname, return_obj.pointer,
 553                              (u32)return_obj.length);
 554                         acpi_db_dump_external_object(return_obj.pointer, 1);
 555                 }
 556 #endif
 557         }
 558
 559         /* Signal our completion */
 560
 561         allow = 0;
 562         (void)acpi_os_wait_semaphore(info->thread_complete_gate,
 563                                      1, ACPI_WAIT_FOREVER);
 564         info->num_completed++;
 565
 566         if (info->num_completed == info->num_threads) {
 567
 568                 /* Do signal for main thread once only */
 569                 allow = 1;
 570         }
 571
 572         (void)acpi_os_signal_semaphore(info->thread_complete_gate, 1);
 573
 574         if (allow) {
 575                 status = acpi_os_signal_semaphore(info->main_thread_gate, 1);
 576                 if (ACPI_FAILURE(status)) {
 577                         acpi_os_printf
 578                             ("Could not signal debugger thread sync semaphore, %s\n",
 579                              acpi_format_exception(status));
 580                 }
 581         }
 582 }
 583
 584 /*******************************************************************************
 585  *
 586  * FUNCTION:    acpi_db_create_execution_threads
 587  *
 588  * PARAMETERS:  num_threads_arg         - Number of threads to create
 589  *              num_loops_arg           - Loop count for the thread(s)
 590  *              method_name_arg         - Control method to execute
 591  *
 592  * RETURN:      None
 593  *
 594  * DESCRIPTION: Create threads to execute method(s)
 595  *
 596  ******************************************************************************/
 597
 598 void
 599 acpi_db_create_execution_threads(char *num_threads_arg,
 600                                  char *num_loops_arg, char *method_name_arg)
 601 {
 602         acpi_status status;
 603         u32 num_threads;
 604         u32 num_loops;
 605         u32 i;
 606         u32 size;
 607         acpi_mutex main_thread_gate;
 608         acpi_mutex thread_complete_gate;
 609         acpi_mutex info_gate;
 610
 611         /* Get the arguments */
 612
 613         num_threads = strtoul(num_threads_arg, NULL, 0);
 614         num_loops = strtoul(num_loops_arg, NULL, 0);
 615
 616         if (!num_threads || !num_loops) {
 617                 acpi_os_printf("Bad argument: Threads %X, Loops %X\n",
 618                                num_threads, num_loops);
 619                 return;
 620         }
 621
 622         /*
 623          * Create the semaphore for synchronization of
 624          * the created threads with the main thread.
 625          */
 626         status = acpi_os_create_semaphore(1, 0, &main_thread_gate);
 627         if (ACPI_FAILURE(status)) {
 628                 acpi_os_printf("Could not create semaphore for "
 629                                "synchronization with the main thread, %s\n",
 630                                acpi_format_exception(status));
 631                 return;
 632         }
 633
 634         /*
 635          * Create the semaphore for synchronization
 636          * between the created threads.
 637          */
 638         status = acpi_os_create_semaphore(1, 1, &thread_complete_gate);
 639         if (ACPI_FAILURE(status)) {
 640                 acpi_os_printf("Could not create semaphore for "
 641                                "synchronization between the created threads, %s\n",
 642                                acpi_format_exception(status));
 643
 644                 (void)acpi_os_delete_semaphore(main_thread_gate);
 645                 return;
 646         }
 647
 648         status = acpi_os_create_semaphore(1, 1, &info_gate);
 649         if (ACPI_FAILURE(status)) {
 650                 acpi_os_printf("Could not create semaphore for "
 651                                "synchronization of AcpiGbl_DbMethodInfo, %s\n",
 652                                acpi_format_exception(status));
 653
 654                 (void)acpi_os_delete_semaphore(thread_complete_gate);
 655                 (void)acpi_os_delete_semaphore(main_thread_gate);
 656                 return;
 657         }
 658
 659         memset(&acpi_gbl_db_method_info, 0, sizeof(struct acpi_db_method_info));
 660
 661         /* Array to store IDs of threads */
 662
 663         acpi_gbl_db_method_info.num_threads = num_threads;
 664         size = sizeof(acpi_thread_id) * acpi_gbl_db_method_info.num_threads;
 665
 666         acpi_gbl_db_method_info.threads = acpi_os_allocate(size);
 667         if (acpi_gbl_db_method_info.threads == NULL) {
 668                 acpi_os_printf("No memory for thread IDs array\n");
 669                 (void)acpi_os_delete_semaphore(main_thread_gate);
 670                 (void)acpi_os_delete_semaphore(thread_complete_gate);
 671                 (void)acpi_os_delete_semaphore(info_gate);
 672                 return;
 673         }
 674         memset(acpi_gbl_db_method_info.threads, 0, size);
 675
 676         /* Setup the context to be passed to each thread */
 677
 678         acpi_gbl_db_method_info.name = method_name_arg;
 679         acpi_gbl_db_method_info.flags = 0;
 680         acpi_gbl_db_method_info.num_loops = num_loops;
 681         acpi_gbl_db_method_info.main_thread_gate = main_thread_gate;
 682         acpi_gbl_db_method_info.thread_complete_gate = thread_complete_gate;
 683         acpi_gbl_db_method_info.info_gate = info_gate;
 684
 685         /* Init arguments to be passed to method */
 686
 687         acpi_gbl_db_method_info.init_args = 1;
 688         acpi_gbl_db_method_info.args = acpi_gbl_db_method_info.arguments;
 689         acpi_gbl_db_method_info.arguments[0] =
 690             acpi_gbl_db_method_info.num_threads_str;
 691         acpi_gbl_db_method_info.arguments[1] =
 692             acpi_gbl_db_method_info.id_of_thread_str;
 693         acpi_gbl_db_method_info.arguments[2] =
 694             acpi_gbl_db_method_info.index_of_thread_str;
 695         acpi_gbl_db_method_info.arguments[3] = NULL;
 696
 697         acpi_gbl_db_method_info.types = acpi_gbl_db_method_info.arg_types;
 698         acpi_gbl_db_method_info.arg_types[0] = ACPI_TYPE_INTEGER;
 699         acpi_gbl_db_method_info.arg_types[1] = ACPI_TYPE_INTEGER;
 700         acpi_gbl_db_method_info.arg_types[2] = ACPI_TYPE_INTEGER;
 701
 702         acpi_db_uint32_to_hex_string(num_threads,
 703                                      acpi_gbl_db_method_info.num_threads_str);
 704
 705         status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 706         if (ACPI_FAILURE(status)) {
 707                 goto cleanup_and_exit;
 708         }
 709
 710         /* Get the NS node, determines existence also */
 711
 712         status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
 713                                  &acpi_gbl_db_method_info.method);
 714         if (ACPI_FAILURE(status)) {
 715                 acpi_os_printf("%s Could not get handle for %s\n",
 716                                acpi_format_exception(status),
 717                                acpi_gbl_db_method_info.pathname);
 718                 goto cleanup_and_exit;
 719         }
 720
 721         /* Create the threads */
 722
 723         acpi_os_printf("Creating %X threads to execute %X times each\n",
 724                        num_threads, num_loops);
 725
 726         for (i = 0; i < (num_threads); i++) {
 727                 status =
 728                     acpi_os_execute(OSL_DEBUGGER_EXEC_THREAD,
 729                                     acpi_db_method_thread,
 730                                     &acpi_gbl_db_method_info);
 731                 if (ACPI_FAILURE(status)) {
 732                         break;
 733                 }
 734         }
 735
 736         /* Wait for all threads to complete */
 737
 738         (void)acpi_os_wait_semaphore(main_thread_gate, 1, ACPI_WAIT_FOREVER);
 739
 740         acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 741         acpi_os_printf("All threads (%X) have completed\n", num_threads);
 742         acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
 743
 744 cleanup_and_exit:
 745
 746         /* Cleanup and exit */
 747
 748         (void)acpi_os_delete_semaphore(main_thread_gate);
 749         (void)acpi_os_delete_semaphore(thread_complete_gate);
 750         (void)acpi_os_delete_semaphore(info_gate);
 751
 752         acpi_os_free(acpi_gbl_db_method_info.threads);
 753         acpi_gbl_db_method_info.threads = NULL;
 754 }