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 #endif
 374
 375         /*
 376          * Allow one execution to be performed by debugger or single step
 377          * execution will be dead locked by the interpreter mutexes.
 378          */
 379         if (acpi_gbl_method_executing) {
 380                 acpi_os_printf("Only one debugger execution is allowed.\n");
 381                 return;
 382         }
 383 #ifdef ACPI_DEBUG_OUTPUT
 384         /* Memory allocation tracking */
 385
 386         previous_allocations = acpi_db_get_outstanding_allocations();
 387 #endif
 388
 389         if (*name == '*') {
 390                 (void)acpi_walk_namespace(ACPI_TYPE_METHOD, ACPI_ROOT_OBJECT,
 391                                           ACPI_UINT32_MAX,
 392                                           acpi_db_execution_walk, NULL, NULL,
 393                                           NULL);
 394                 return;
 395         } else {
 396                 name_string = ACPI_ALLOCATE(strlen(name) + 1);
 397                 if (!name_string) {
 398                         return;
 399                 }
 400
 401                 memset(&acpi_gbl_db_method_info, 0,
 402                        sizeof(struct acpi_db_method_info));
 403
 404                 strcpy(name_string, name);
 405                 acpi_ut_strupr(name_string);
 406                 acpi_gbl_db_method_info.name = name_string;
 407                 acpi_gbl_db_method_info.args = args;
 408                 acpi_gbl_db_method_info.types = types;
 409                 acpi_gbl_db_method_info.flags = flags;
 410
 411                 return_obj.pointer = NULL;
 412                 return_obj.length = ACPI_ALLOCATE_BUFFER;
 413
 414                 status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 415                 if (ACPI_FAILURE(status)) {
 416                         ACPI_FREE(name_string);
 417                         return;
 418                 }
 419
 420                 /* Get the NS node, determines existence also */
 421
 422                 status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
 423                                          &acpi_gbl_db_method_info.method);
 424                 if (ACPI_SUCCESS(status)) {
 425                         status =
 426                             acpi_db_execute_method(&acpi_gbl_db_method_info,
 427                                                    &return_obj);
 428                 }
 429                 ACPI_FREE(name_string);
 430         }
 431
 432         /*
 433          * Allow any handlers in separate threads to complete.
 434          * (Such as Notify handlers invoked from AML executed above).
 435          */
 436         acpi_os_sleep((u64)10);
 437
 438 #ifdef ACPI_DEBUG_OUTPUT
 439
 440         /* Memory allocation tracking */
 441
 442         allocations =
 443             acpi_db_get_outstanding_allocations() - previous_allocations;
 444
 445         acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 446
 447         if (allocations > 0) {
 448                 acpi_os_printf
 449                     ("0x%X Outstanding allocations after evaluation of %s\n",
 450                      allocations, acpi_gbl_db_method_info.pathname);
 451         }
 452 #endif
 453
 454         if (ACPI_FAILURE(status)) {
 455                 acpi_os_printf("Evaluation of %s failed with status %s\n",
 456                                acpi_gbl_db_method_info.pathname,
 457                                acpi_format_exception(status));
 458         } else {
 459                 /* Display a return object, if any */
 460
 461                 if (return_obj.length) {
 462                         acpi_os_printf("Evaluation of %s returned object %p, "
 463                                        "external buffer length %X\n",
 464                                        acpi_gbl_db_method_info.pathname,
 465                                        return_obj.pointer,
 466                                        (u32)return_obj.length);
 467
 468                         acpi_db_dump_external_object(return_obj.pointer, 1);
 469
 470                         /* Dump a _PLD buffer if present */
 471
 472                         if (ACPI_COMPARE_NAME
 473                             ((ACPI_CAST_PTR
 474                               (struct acpi_namespace_node,
 475                                acpi_gbl_db_method_info.method)->name.ascii),
 476                              METHOD_NAME__PLD)) {
 477                                 acpi_db_dump_pld_buffer(return_obj.pointer);
 478                         }
 479                 } else {
 480                         acpi_os_printf
 481                             ("No object was returned from evaluation of %s\n",
 482                              acpi_gbl_db_method_info.pathname);
 483                 }
 484         }
 485
 486         acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
 487 }
 488
 489 /*******************************************************************************
 490  *
 491  * FUNCTION:    acpi_db_method_thread
 492  *
 493  * PARAMETERS:  context             - Execution info segment
 494  *
 495  * RETURN:      None
 496  *
 497  * DESCRIPTION: Debugger execute thread. Waits for a command line, then
 498  *              simply dispatches it.
 499  *
 500  ******************************************************************************/
 501
 502 static void ACPI_SYSTEM_XFACE acpi_db_method_thread(void *context)
 503 {
 504         acpi_status status;
 505         struct acpi_db_method_info *info = context;
 506         struct acpi_db_method_info local_info;
 507         u32 i;
 508         u8 allow;
 509         struct acpi_buffer return_obj;
 510
 511         /*
 512          * acpi_gbl_db_method_info.Arguments will be passed as method arguments.
 513          * Prevent acpi_gbl_db_method_info from being modified by multiple threads
 514          * concurrently.
 515          *
 516          * Note: The arguments we are passing are used by the ASL test suite
 517          * (aslts). Do not change them without updating the tests.
 518          */
 519         (void)acpi_os_wait_semaphore(info->info_gate, 1, ACPI_WAIT_FOREVER);
 520
 521         if (info->init_args) {
 522                 acpi_db_uint32_to_hex_string(info->num_created,
 523                                              info->index_of_thread_str);
 524                 acpi_db_uint32_to_hex_string((u32)acpi_os_get_thread_id(),
 525                                              info->id_of_thread_str);
 526         }
 527
 528         if (info->threads && (info->num_created < info->num_threads)) {
 529                 info->threads[info->num_created++] = acpi_os_get_thread_id();
 530         }
 531
 532         local_info = *info;
 533         local_info.args = local_info.arguments;
 534         local_info.arguments[0] = local_info.num_threads_str;
 535         local_info.arguments[1] = local_info.id_of_thread_str;
 536         local_info.arguments[2] = local_info.index_of_thread_str;
 537         local_info.arguments[3] = NULL;
 538
 539         local_info.types = local_info.arg_types;
 540
 541         (void)acpi_os_signal_semaphore(info->info_gate, 1);
 542
 543         for (i = 0; i < info->num_loops; i++) {
 544                 status = acpi_db_execute_method(&local_info, &return_obj);
 545                 if (ACPI_FAILURE(status)) {
 546                         acpi_os_printf
 547                             ("%s During evaluation of %s at iteration %X\n",
 548                              acpi_format_exception(status), info->pathname, i);
 549                         if (status == AE_ABORT_METHOD) {
 550                                 break;
 551                         }
 552                 }
 553 #if 0
 554                 if ((i % 100) == 0) {
 555                         acpi_os_printf("%u loops, Thread 0x%x\n",
 556                                        i, acpi_os_get_thread_id());
 557                 }
 558
 559                 if (return_obj.length) {
 560                         acpi_os_printf
 561                             ("Evaluation of %s returned object %p Buflen %X\n",
 562                              info->pathname, return_obj.pointer,
 563                              (u32)return_obj.length);
 564                         acpi_db_dump_external_object(return_obj.pointer, 1);
 565                 }
 566 #endif
 567         }
 568
 569         /* Signal our completion */
 570
 571         allow = 0;
 572         (void)acpi_os_wait_semaphore(info->thread_complete_gate,
 573                                      1, ACPI_WAIT_FOREVER);
 574         info->num_completed++;
 575
 576         if (info->num_completed == info->num_threads) {
 577
 578                 /* Do signal for main thread once only */
 579                 allow = 1;
 580         }
 581
 582         (void)acpi_os_signal_semaphore(info->thread_complete_gate, 1);
 583
 584         if (allow) {
 585                 status = acpi_os_signal_semaphore(info->main_thread_gate, 1);
 586                 if (ACPI_FAILURE(status)) {
 587                         acpi_os_printf
 588                             ("Could not signal debugger thread sync semaphore, %s\n",
 589                              acpi_format_exception(status));
 590                 }
 591         }
 592 }
 593
 594 /*******************************************************************************
 595  *
 596  * FUNCTION:    acpi_db_create_execution_threads
 597  *
 598  * PARAMETERS:  num_threads_arg         - Number of threads to create
 599  *              num_loops_arg           - Loop count for the thread(s)
 600  *              method_name_arg         - Control method to execute
 601  *
 602  * RETURN:      None
 603  *
 604  * DESCRIPTION: Create threads to execute method(s)
 605  *
 606  ******************************************************************************/
 607
 608 void
 609 acpi_db_create_execution_threads(char *num_threads_arg,
 610                                  char *num_loops_arg, char *method_name_arg)
 611 {
 612         acpi_status status;
 613         u32 num_threads;
 614         u32 num_loops;
 615         u32 i;
 616         u32 size;
 617         acpi_mutex main_thread_gate;
 618         acpi_mutex thread_complete_gate;
 619         acpi_mutex info_gate;
 620
 621         /* Get the arguments */
 622
 623         num_threads = strtoul(num_threads_arg, NULL, 0);
 624         num_loops = strtoul(num_loops_arg, NULL, 0);
 625
 626         if (!num_threads || !num_loops) {
 627                 acpi_os_printf("Bad argument: Threads %X, Loops %X\n",
 628                                num_threads, num_loops);
 629                 return;
 630         }
 631
 632         /*
 633          * Create the semaphore for synchronization of
 634          * the created threads with the main thread.
 635          */
 636         status = acpi_os_create_semaphore(1, 0, &main_thread_gate);
 637         if (ACPI_FAILURE(status)) {
 638                 acpi_os_printf("Could not create semaphore for "
 639                                "synchronization with the main thread, %s\n",
 640                                acpi_format_exception(status));
 641                 return;
 642         }
 643
 644         /*
 645          * Create the semaphore for synchronization
 646          * between the created threads.
 647          */
 648         status = acpi_os_create_semaphore(1, 1, &thread_complete_gate);
 649         if (ACPI_FAILURE(status)) {
 650                 acpi_os_printf("Could not create semaphore for "
 651                                "synchronization between the created threads, %s\n",
 652                                acpi_format_exception(status));
 653
 654                 (void)acpi_os_delete_semaphore(main_thread_gate);
 655                 return;
 656         }
 657
 658         status = acpi_os_create_semaphore(1, 1, &info_gate);
 659         if (ACPI_FAILURE(status)) {
 660                 acpi_os_printf("Could not create semaphore for "
 661                                "synchronization of AcpiGbl_DbMethodInfo, %s\n",
 662                                acpi_format_exception(status));
 663
 664                 (void)acpi_os_delete_semaphore(thread_complete_gate);
 665                 (void)acpi_os_delete_semaphore(main_thread_gate);
 666                 return;
 667         }
 668
 669         memset(&acpi_gbl_db_method_info, 0, sizeof(struct acpi_db_method_info));
 670
 671         /* Array to store IDs of threads */
 672
 673         acpi_gbl_db_method_info.num_threads = num_threads;
 674         size = sizeof(acpi_thread_id) * acpi_gbl_db_method_info.num_threads;
 675
 676         acpi_gbl_db_method_info.threads = acpi_os_allocate(size);
 677         if (acpi_gbl_db_method_info.threads == NULL) {
 678                 acpi_os_printf("No memory for thread IDs array\n");
 679                 (void)acpi_os_delete_semaphore(main_thread_gate);
 680                 (void)acpi_os_delete_semaphore(thread_complete_gate);
 681                 (void)acpi_os_delete_semaphore(info_gate);
 682                 return;
 683         }
 684         memset(acpi_gbl_db_method_info.threads, 0, size);
 685
 686         /* Setup the context to be passed to each thread */
 687
 688         acpi_gbl_db_method_info.name = method_name_arg;
 689         acpi_gbl_db_method_info.flags = 0;
 690         acpi_gbl_db_method_info.num_loops = num_loops;
 691         acpi_gbl_db_method_info.main_thread_gate = main_thread_gate;
 692         acpi_gbl_db_method_info.thread_complete_gate = thread_complete_gate;
 693         acpi_gbl_db_method_info.info_gate = info_gate;
 694
 695         /* Init arguments to be passed to method */
 696
 697         acpi_gbl_db_method_info.init_args = 1;
 698         acpi_gbl_db_method_info.args = acpi_gbl_db_method_info.arguments;
 699         acpi_gbl_db_method_info.arguments[0] =
 700             acpi_gbl_db_method_info.num_threads_str;
 701         acpi_gbl_db_method_info.arguments[1] =
 702             acpi_gbl_db_method_info.id_of_thread_str;
 703         acpi_gbl_db_method_info.arguments[2] =
 704             acpi_gbl_db_method_info.index_of_thread_str;
 705         acpi_gbl_db_method_info.arguments[3] = NULL;
 706
 707         acpi_gbl_db_method_info.types = acpi_gbl_db_method_info.arg_types;
 708         acpi_gbl_db_method_info.arg_types[0] = ACPI_TYPE_INTEGER;
 709         acpi_gbl_db_method_info.arg_types[1] = ACPI_TYPE_INTEGER;
 710         acpi_gbl_db_method_info.arg_types[2] = ACPI_TYPE_INTEGER;
 711
 712         acpi_db_uint32_to_hex_string(num_threads,
 713                                      acpi_gbl_db_method_info.num_threads_str);
 714
 715         status = acpi_db_execute_setup(&acpi_gbl_db_method_info);
 716         if (ACPI_FAILURE(status)) {
 717                 goto cleanup_and_exit;
 718         }
 719
 720         /* Get the NS node, determines existence also */
 721
 722         status = acpi_get_handle(NULL, acpi_gbl_db_method_info.pathname,
 723                                  &acpi_gbl_db_method_info.method);
 724         if (ACPI_FAILURE(status)) {
 725                 acpi_os_printf("%s Could not get handle for %s\n",
 726                                acpi_format_exception(status),
 727                                acpi_gbl_db_method_info.pathname);
 728                 goto cleanup_and_exit;
 729         }
 730
 731         /* Create the threads */
 732
 733         acpi_os_printf("Creating %X threads to execute %X times each\n",
 734                        num_threads, num_loops);
 735
 736         for (i = 0; i < (num_threads); i++) {
 737                 status =
 738                     acpi_os_execute(OSL_DEBUGGER_EXEC_THREAD,
 739                                     acpi_db_method_thread,
 740                                     &acpi_gbl_db_method_info);
 741                 if (ACPI_FAILURE(status)) {
 742                         break;
 743                 }
 744         }
 745
 746         /* Wait for all threads to complete */
 747
 748         (void)acpi_os_wait_semaphore(main_thread_gate, 1, ACPI_WAIT_FOREVER);
 749
 750         acpi_db_set_output_destination(ACPI_DB_DUPLICATE_OUTPUT);
 751         acpi_os_printf("All threads (%X) have completed\n", num_threads);
 752         acpi_db_set_output_destination(ACPI_DB_CONSOLE_OUTPUT);
 753
 754 cleanup_and_exit:
 755
 756         /* Cleanup and exit */
 757
 758         (void)acpi_os_delete_semaphore(main_thread_gate);
 759         (void)acpi_os_delete_semaphore(thread_complete_gate);
 760         (void)acpi_os_delete_semaphore(info_gate);
 761
 762         acpi_os_free(acpi_gbl_db_method_info.threads);
 763         acpi_gbl_db_method_info.threads = NULL;
 764 }