dbexec.c revision 306536 
1/*******************************************************************************
2 *
3 * Module Name: dbexec - debugger control method execution
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, 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 <contrib/dev/acpica/include/acpi.h>
45#include <contrib/dev/acpica/include/accommon.h>
46#include <contrib/dev/acpica/include/acdebug.h>
47#include <contrib/dev/acpica/include/acnamesp.h>
48
49
50#define _COMPONENT          ACPI_CA_DEBUGGER
51        ACPI_MODULE_NAME    ("dbexec")
52
53
54static ACPI_DB_METHOD_INFO          AcpiGbl_DbMethodInfo;
55
56/* Local prototypes */
57
58static ACPI_STATUS
59AcpiDbExecuteMethod (
60    ACPI_DB_METHOD_INFO     *Info,
61    ACPI_BUFFER             *ReturnObj);
62
63static ACPI_STATUS
64AcpiDbExecuteSetup (
65    ACPI_DB_METHOD_INFO     *Info);
66
67static UINT32
68AcpiDbGetOutstandingAllocations (
69    void);
70
71static void ACPI_SYSTEM_XFACE
72AcpiDbMethodThread (
73    void                    *Context);
74
75static ACPI_STATUS
76AcpiDbExecutionWalk (
77    ACPI_HANDLE             ObjHandle,
78    UINT32                  NestingLevel,
79    void                    *Context,
80    void                    **ReturnValue);
81
82
83/*******************************************************************************
84 *
85 * FUNCTION:    AcpiDbDeleteObjects
86 *
87 * PARAMETERS:  Count               - Count of objects in the list
88 *              Objects             - Array of ACPI_OBJECTs to be deleted
89 *
90 * RETURN:      None
91 *
92 * DESCRIPTION: Delete a list of ACPI_OBJECTS. Handles packages and nested
93 *              packages via recursion.
94 *
95 ******************************************************************************/
96
97void
98AcpiDbDeleteObjects (
99    UINT32                  Count,
100    ACPI_OBJECT             *Objects)
101{
102    UINT32                  i;
103
104
105    for (i = 0; i < Count; i++)
106    {
107        switch (Objects[i].Type)
108        {
109        case ACPI_TYPE_BUFFER:
110
111            ACPI_FREE (Objects[i].Buffer.Pointer);
112            break;
113
114        case ACPI_TYPE_PACKAGE:
115
116            /* Recursive call to delete package elements */
117
118            AcpiDbDeleteObjects (Objects[i].Package.Count,
119                Objects[i].Package.Elements);
120
121            /* Free the elements array */
122
123            ACPI_FREE (Objects[i].Package.Elements);
124            break;
125
126        default:
127
128            break;
129        }
130    }
131}
132
133
134/*******************************************************************************
135 *
136 * FUNCTION:    AcpiDbExecuteMethod
137 *
138 * PARAMETERS:  Info            - Valid info segment
139 *              ReturnObj       - Where to put return object
140 *
141 * RETURN:      Status
142 *
143 * DESCRIPTION: Execute a control method.
144 *
145 ******************************************************************************/
146
147static ACPI_STATUS
148AcpiDbExecuteMethod (
149    ACPI_DB_METHOD_INFO     *Info,
150    ACPI_BUFFER             *ReturnObj)
151{
152    ACPI_STATUS             Status;
153    ACPI_OBJECT_LIST        ParamObjects;
154    ACPI_OBJECT             Params[ACPI_DEBUGGER_MAX_ARGS + 1];
155    UINT32                  i;
156
157
158    ACPI_FUNCTION_TRACE (DbExecuteMethod);
159
160
161    if (AcpiGbl_DbOutputToFile && !AcpiDbgLevel)
162    {
163        AcpiOsPrintf ("Warning: debug output is not enabled!\n");
164    }
165
166    ParamObjects.Count = 0;
167    ParamObjects.Pointer = NULL;
168
169    /* Pass through any command-line arguments */
170
171    if (Info->Args && Info->Args[0])
172    {
173        /* Get arguments passed on the command line */
174
175        for (i = 0; (Info->Args[i] && *(Info->Args[i])); i++)
176        {
177            /* Convert input string (token) to an actual ACPI_OBJECT */
178
179            Status = AcpiDbConvertToObject (Info->Types[i],
180                Info->Args[i], &Params[i]);
181            if (ACPI_FAILURE (Status))
182            {
183                ACPI_EXCEPTION ((AE_INFO, Status,
184                    "While parsing method arguments"));
185                goto Cleanup;
186            }
187        }
188
189        ParamObjects.Count = i;
190        ParamObjects.Pointer = Params;
191    }
192
193    /* Prepare for a return object of arbitrary size */
194
195    ReturnObj->Pointer = AcpiGbl_DbBuffer;
196    ReturnObj->Length  = ACPI_DEBUG_BUFFER_SIZE;
197
198    /* Do the actual method execution */
199
200    AcpiGbl_MethodExecuting = TRUE;
201    Status = AcpiEvaluateObject (NULL, Info->Pathname,
202        &ParamObjects, ReturnObj);
203
204    AcpiGbl_CmSingleStep = FALSE;
205    AcpiGbl_MethodExecuting = FALSE;
206
207    if (ACPI_FAILURE (Status))
208    {
209        ACPI_EXCEPTION ((AE_INFO, Status,
210            "while executing %s from debugger", Info->Pathname));
211
212        if (Status == AE_BUFFER_OVERFLOW)
213        {
214            ACPI_ERROR ((AE_INFO,
215                "Possible overflow of internal debugger "
216                "buffer (size 0x%X needed 0x%X)",
217                ACPI_DEBUG_BUFFER_SIZE, (UINT32) ReturnObj->Length));
218        }
219    }
220
221Cleanup:
222    AcpiDbDeleteObjects (ParamObjects.Count, Params);
223    return_ACPI_STATUS (Status);
224}
225
226
227/*******************************************************************************
228 *
229 * FUNCTION:    AcpiDbExecuteSetup
230 *
231 * PARAMETERS:  Info            - Valid method info
232 *
233 * RETURN:      None
234 *
235 * DESCRIPTION: Setup info segment prior to method execution
236 *
237 ******************************************************************************/
238
239static ACPI_STATUS
240AcpiDbExecuteSetup (
241    ACPI_DB_METHOD_INFO     *Info)
242{
243    ACPI_STATUS             Status;
244
245
246    ACPI_FUNCTION_NAME (DbExecuteSetup);
247
248
249    /* Catenate the current scope to the supplied name */
250
251    Info->Pathname[0] = 0;
252    if ((Info->Name[0] != '\\') &&
253        (Info->Name[0] != '/'))
254    {
255        if (AcpiUtSafeStrcat (Info->Pathname, sizeof (Info->Pathname),
256            AcpiGbl_DbScopeBuf))
257        {
258            Status = AE_BUFFER_OVERFLOW;
259            goto ErrorExit;
260        }
261    }
262
263    if (AcpiUtSafeStrcat (Info->Pathname, sizeof (Info->Pathname),
264        Info->Name))
265    {
266        Status = AE_BUFFER_OVERFLOW;
267        goto ErrorExit;
268    }
269
270    AcpiDbPrepNamestring (Info->Pathname);
271
272    AcpiDbSetOutputDestination (ACPI_DB_DUPLICATE_OUTPUT);
273    AcpiOsPrintf ("Evaluating %s\n", Info->Pathname);
274
275    if (Info->Flags & EX_SINGLE_STEP)
276    {
277        AcpiGbl_CmSingleStep = TRUE;
278        AcpiDbSetOutputDestination (ACPI_DB_CONSOLE_OUTPUT);
279    }
280
281    else
282    {
283        /* No single step, allow redirection to a file */
284
285        AcpiDbSetOutputDestination (ACPI_DB_REDIRECTABLE_OUTPUT);
286    }
287
288    return (AE_OK);
289
290ErrorExit:
291
292    ACPI_EXCEPTION ((AE_INFO, Status, "During setup for method execution"));
293    return (Status);
294}
295
296
297#ifdef ACPI_DBG_TRACK_ALLOCATIONS
298UINT32
299AcpiDbGetCacheInfo (
300    ACPI_MEMORY_LIST        *Cache)
301{
302
303    return (Cache->TotalAllocated - Cache->TotalFreed - Cache->CurrentDepth);
304}
305#endif
306
307/*******************************************************************************
308 *
309 * FUNCTION:    AcpiDbGetOutstandingAllocations
310 *
311 * PARAMETERS:  None
312 *
313 * RETURN:      Current global allocation count minus cache entries
314 *
315 * DESCRIPTION: Determine the current number of "outstanding" allocations --
316 *              those allocations that have not been freed and also are not
317 *              in one of the various object caches.
318 *
319 ******************************************************************************/
320
321static UINT32
322AcpiDbGetOutstandingAllocations (
323    void)
324{
325    UINT32                  Outstanding = 0;
326
327#ifdef ACPI_DBG_TRACK_ALLOCATIONS
328
329    Outstanding += AcpiDbGetCacheInfo (AcpiGbl_StateCache);
330    Outstanding += AcpiDbGetCacheInfo (AcpiGbl_PsNodeCache);
331    Outstanding += AcpiDbGetCacheInfo (AcpiGbl_PsNodeExtCache);
332    Outstanding += AcpiDbGetCacheInfo (AcpiGbl_OperandCache);
333#endif
334
335    return (Outstanding);
336}
337
338
339/*******************************************************************************
340 *
341 * FUNCTION:    AcpiDbExecutionWalk
342 *
343 * PARAMETERS:  WALK_CALLBACK
344 *
345 * RETURN:      Status
346 *
347 * DESCRIPTION: Execute a control method. Name is relative to the current
348 *              scope.
349 *
350 ******************************************************************************/
351
352static ACPI_STATUS
353AcpiDbExecutionWalk (
354    ACPI_HANDLE             ObjHandle,
355    UINT32                  NestingLevel,
356    void                    *Context,
357    void                    **ReturnValue)
358{
359    ACPI_OPERAND_OBJECT     *ObjDesc;
360    ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
361    ACPI_BUFFER             ReturnObj;
362    ACPI_STATUS             Status;
363
364
365    ObjDesc = AcpiNsGetAttachedObject (Node);
366    if (ObjDesc->Method.ParamCount)
367    {
368        return (AE_OK);
369    }
370
371    ReturnObj.Pointer = NULL;
372    ReturnObj.Length = ACPI_ALLOCATE_BUFFER;
373
374    AcpiNsPrintNodePathname (Node, "Evaluating");
375
376    /* Do the actual method execution */
377
378    AcpiOsPrintf ("\n");
379    AcpiGbl_MethodExecuting = TRUE;
380
381    Status = AcpiEvaluateObject (Node, NULL, NULL, &ReturnObj);
382
383    AcpiOsPrintf ("Evaluation of [%4.4s] returned %s\n",
384        AcpiUtGetNodeName (Node),
385        AcpiFormatException (Status));
386
387    AcpiGbl_MethodExecuting = FALSE;
388    return (AE_OK);
389}
390
391
392/*******************************************************************************
393 *
394 * FUNCTION:    AcpiDbExecute
395 *
396 * PARAMETERS:  Name                - Name of method to execute
397 *              Args                - Parameters to the method
398 *              Types               -
399 *              Flags               - single step/no single step
400 *
401 * RETURN:      None
402 *
403 * DESCRIPTION: Execute a control method. Name is relative to the current
404 *              scope.
405 *
406 ******************************************************************************/
407
408void
409AcpiDbExecute (
410    char                    *Name,
411    char                    **Args,
412    ACPI_OBJECT_TYPE        *Types,
413    UINT32                  Flags)
414{
415    ACPI_STATUS             Status;
416    ACPI_BUFFER             ReturnObj;
417    char                    *NameString;
418
419#ifdef ACPI_DEBUG_OUTPUT
420    UINT32                  PreviousAllocations;
421    UINT32                  Allocations;
422#endif
423
424
425    /*
426     * Allow one execution to be performed by debugger or single step
427     * execution will be dead locked by the interpreter mutexes.
428     */
429    if (AcpiGbl_MethodExecuting)
430    {
431        AcpiOsPrintf ("Only one debugger execution is allowed.\n");
432        return;
433    }
434
435#ifdef ACPI_DEBUG_OUTPUT
436    /* Memory allocation tracking */
437
438    PreviousAllocations = AcpiDbGetOutstandingAllocations ();
439#endif
440
441    if (*Name == '*')
442    {
443        (void) AcpiWalkNamespace (ACPI_TYPE_METHOD, ACPI_ROOT_OBJECT,
444            ACPI_UINT32_MAX, AcpiDbExecutionWalk, NULL, NULL, NULL);
445        return;
446    }
447    else
448    {
449        NameString = ACPI_ALLOCATE (strlen (Name) + 1);
450        if (!NameString)
451        {
452            return;
453        }
454
455        memset (&AcpiGbl_DbMethodInfo, 0, sizeof (ACPI_DB_METHOD_INFO));
456
457        strcpy (NameString, Name);
458        AcpiUtStrupr (NameString);
459        AcpiGbl_DbMethodInfo.Name = NameString;
460        AcpiGbl_DbMethodInfo.Args = Args;
461        AcpiGbl_DbMethodInfo.Types = Types;
462        AcpiGbl_DbMethodInfo.Flags = Flags;
463
464        ReturnObj.Pointer = NULL;
465        ReturnObj.Length = ACPI_ALLOCATE_BUFFER;
466
467        Status = AcpiDbExecuteSetup (&AcpiGbl_DbMethodInfo);
468        if (ACPI_FAILURE (Status))
469        {
470            ACPI_FREE (NameString);
471            return;
472        }
473
474        /* Get the NS node, determines existence also */
475
476        Status = AcpiGetHandle (NULL, AcpiGbl_DbMethodInfo.Pathname,
477            &AcpiGbl_DbMethodInfo.Method);
478        if (ACPI_SUCCESS (Status))
479        {
480            Status = AcpiDbExecuteMethod (&AcpiGbl_DbMethodInfo,
481                &ReturnObj);
482        }
483        ACPI_FREE (NameString);
484    }
485
486    /*
487     * Allow any handlers in separate threads to complete.
488     * (Such as Notify handlers invoked from AML executed above).
489     */
490    AcpiOsSleep ((UINT64) 10);
491
492#ifdef ACPI_DEBUG_OUTPUT
493
494    /* Memory allocation tracking */
495
496    Allocations = AcpiDbGetOutstandingAllocations () - PreviousAllocations;
497
498    AcpiDbSetOutputDestination (ACPI_DB_DUPLICATE_OUTPUT);
499
500    if (Allocations > 0)
501    {
502        AcpiOsPrintf (
503            "0x%X Outstanding allocations after evaluation of %s\n",
504            Allocations, AcpiGbl_DbMethodInfo.Pathname);
505    }
506#endif
507
508    if (ACPI_FAILURE (Status))
509    {
510        AcpiOsPrintf ("Evaluation of %s failed with status %s\n",
511            AcpiGbl_DbMethodInfo.Pathname,
512            AcpiFormatException (Status));
513    }
514    else
515    {
516        /* Display a return object, if any */
517
518        if (ReturnObj.Length)
519        {
520            AcpiOsPrintf (
521                "Evaluation of %s returned object %p, "
522                "external buffer length %X\n",
523                AcpiGbl_DbMethodInfo.Pathname, ReturnObj.Pointer,
524                (UINT32) ReturnObj.Length);
525
526            AcpiDbDumpExternalObject (ReturnObj.Pointer, 1);
527
528            /* Dump a _PLD buffer if present */
529
530            if (ACPI_COMPARE_NAME ((ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
531                AcpiGbl_DbMethodInfo.Method)->Name.Ascii),
532                METHOD_NAME__PLD))
533            {
534                AcpiDbDumpPldBuffer (ReturnObj.Pointer);
535            }
536        }
537        else
538        {
539            AcpiOsPrintf ("No object was returned from evaluation of %s\n",
540                AcpiGbl_DbMethodInfo.Pathname);
541        }
542    }
543
544    AcpiDbSetOutputDestination (ACPI_DB_CONSOLE_OUTPUT);
545}
546
547
548/*******************************************************************************
549 *
550 * FUNCTION:    AcpiDbMethodThread
551 *
552 * PARAMETERS:  Context             - Execution info segment
553 *
554 * RETURN:      None
555 *
556 * DESCRIPTION: Debugger execute thread. Waits for a command line, then
557 *              simply dispatches it.
558 *
559 ******************************************************************************/
560
561static void ACPI_SYSTEM_XFACE
562AcpiDbMethodThread (
563    void                    *Context)
564{
565    ACPI_STATUS             Status;
566    ACPI_DB_METHOD_INFO     *Info = Context;
567    ACPI_DB_METHOD_INFO     LocalInfo;
568    UINT32                  i;
569    UINT8                   Allow;
570    ACPI_BUFFER             ReturnObj;
571
572
573    /*
574     * AcpiGbl_DbMethodInfo.Arguments will be passed as method arguments.
575     * Prevent AcpiGbl_DbMethodInfo from being modified by multiple threads
576     * concurrently.
577     *
578     * Note: The arguments we are passing are used by the ASL test suite
579     * (aslts). Do not change them without updating the tests.
580     */
581    (void) AcpiOsWaitSemaphore (Info->InfoGate, 1, ACPI_WAIT_FOREVER);
582
583    if (Info->InitArgs)
584    {
585        AcpiDbUint32ToHexString (Info->NumCreated,
586            Info->IndexOfThreadStr);
587        AcpiDbUint32ToHexString ((UINT32) AcpiOsGetThreadId (),
588            Info->IdOfThreadStr);
589    }
590
591    if (Info->Threads && (Info->NumCreated < Info->NumThreads))
592    {
593        Info->Threads[Info->NumCreated++] = AcpiOsGetThreadId();
594    }
595
596    LocalInfo = *Info;
597    LocalInfo.Args = LocalInfo.Arguments;
598    LocalInfo.Arguments[0] = LocalInfo.NumThreadsStr;
599    LocalInfo.Arguments[1] = LocalInfo.IdOfThreadStr;
600    LocalInfo.Arguments[2] = LocalInfo.IndexOfThreadStr;
601    LocalInfo.Arguments[3] = NULL;
602
603    LocalInfo.Types = LocalInfo.ArgTypes;
604
605    (void) AcpiOsSignalSemaphore (Info->InfoGate, 1);
606
607    for (i = 0; i < Info->NumLoops; i++)
608    {
609        Status = AcpiDbExecuteMethod (&LocalInfo, &ReturnObj);
610        if (ACPI_FAILURE (Status))
611        {
612            AcpiOsPrintf ("%s During evaluation of %s at iteration %X\n",
613                AcpiFormatException (Status), Info->Pathname, i);
614            if (Status == AE_ABORT_METHOD)
615            {
616                break;
617            }
618        }
619
620#if 0
621        if ((i % 100) == 0)
622        {
623            AcpiOsPrintf ("%u loops, Thread 0x%x\n",
624                i, AcpiOsGetThreadId ());
625        }
626
627        if (ReturnObj.Length)
628        {
629            AcpiOsPrintf ("Evaluation of %s returned object %p Buflen %X\n",
630                Info->Pathname, ReturnObj.Pointer,
631                (UINT32) ReturnObj.Length);
632            AcpiDbDumpExternalObject (ReturnObj.Pointer, 1);
633        }
634#endif
635    }
636
637    /* Signal our completion */
638
639    Allow = 0;
640    (void) AcpiOsWaitSemaphore (Info->ThreadCompleteGate,
641        1, ACPI_WAIT_FOREVER);
642    Info->NumCompleted++;
643
644    if (Info->NumCompleted == Info->NumThreads)
645    {
646        /* Do signal for main thread once only */
647        Allow = 1;
648    }
649
650    (void) AcpiOsSignalSemaphore (Info->ThreadCompleteGate, 1);
651
652    if (Allow)
653    {
654        Status = AcpiOsSignalSemaphore (Info->MainThreadGate, 1);
655        if (ACPI_FAILURE (Status))
656        {
657            AcpiOsPrintf (
658                "Could not signal debugger thread sync semaphore, %s\n",
659                AcpiFormatException (Status));
660        }
661    }
662}
663
664
665/*******************************************************************************
666 *
667 * FUNCTION:    AcpiDbCreateExecutionThreads
668 *
669 * PARAMETERS:  NumThreadsArg           - Number of threads to create
670 *              NumLoopsArg             - Loop count for the thread(s)
671 *              MethodNameArg           - Control method to execute
672 *
673 * RETURN:      None
674 *
675 * DESCRIPTION: Create threads to execute method(s)
676 *
677 ******************************************************************************/
678
679void
680AcpiDbCreateExecutionThreads (
681    char                    *NumThreadsArg,
682    char                    *NumLoopsArg,
683    char                    *MethodNameArg)
684{
685    ACPI_STATUS             Status;
686    UINT32                  NumThreads;
687    UINT32                  NumLoops;
688    UINT32                  i;
689    UINT32                  Size;
690    ACPI_MUTEX              MainThreadGate;
691    ACPI_MUTEX              ThreadCompleteGate;
692    ACPI_MUTEX              InfoGate;
693
694
695    /* Get the arguments */
696
697    NumThreads = strtoul (NumThreadsArg, NULL, 0);
698    NumLoops = strtoul (NumLoopsArg, NULL, 0);
699
700    if (!NumThreads || !NumLoops)
701    {
702        AcpiOsPrintf ("Bad argument: Threads %X, Loops %X\n",
703            NumThreads, NumLoops);
704        return;
705    }
706
707    /*
708     * Create the semaphore for synchronization of
709     * the created threads with the main thread.
710     */
711    Status = AcpiOsCreateSemaphore (1, 0, &MainThreadGate);
712    if (ACPI_FAILURE (Status))
713    {
714        AcpiOsPrintf ("Could not create semaphore for "
715            "synchronization with the main thread, %s\n",
716            AcpiFormatException (Status));
717        return;
718    }
719
720    /*
721     * Create the semaphore for synchronization
722     * between the created threads.
723     */
724    Status = AcpiOsCreateSemaphore (1, 1, &ThreadCompleteGate);
725    if (ACPI_FAILURE (Status))
726    {
727        AcpiOsPrintf ("Could not create semaphore for "
728            "synchronization between the created threads, %s\n",
729            AcpiFormatException (Status));
730
731        (void) AcpiOsDeleteSemaphore (MainThreadGate);
732        return;
733    }
734
735    Status = AcpiOsCreateSemaphore (1, 1, &InfoGate);
736    if (ACPI_FAILURE (Status))
737    {
738        AcpiOsPrintf ("Could not create semaphore for "
739            "synchronization of AcpiGbl_DbMethodInfo, %s\n",
740            AcpiFormatException (Status));
741
742        (void) AcpiOsDeleteSemaphore (ThreadCompleteGate);
743        (void) AcpiOsDeleteSemaphore (MainThreadGate);
744        return;
745    }
746
747    memset (&AcpiGbl_DbMethodInfo, 0, sizeof (ACPI_DB_METHOD_INFO));
748
749    /* Array to store IDs of threads */
750
751    AcpiGbl_DbMethodInfo.NumThreads = NumThreads;
752    Size = sizeof (ACPI_THREAD_ID) * AcpiGbl_DbMethodInfo.NumThreads;
753
754    AcpiGbl_DbMethodInfo.Threads = AcpiOsAllocate (Size);
755    if (AcpiGbl_DbMethodInfo.Threads == NULL)
756    {
757        AcpiOsPrintf ("No memory for thread IDs array\n");
758        (void) AcpiOsDeleteSemaphore (MainThreadGate);
759        (void) AcpiOsDeleteSemaphore (ThreadCompleteGate);
760        (void) AcpiOsDeleteSemaphore (InfoGate);
761        return;
762    }
763    memset (AcpiGbl_DbMethodInfo.Threads, 0, Size);
764
765    /* Setup the context to be passed to each thread */
766
767    AcpiGbl_DbMethodInfo.Name = MethodNameArg;
768    AcpiGbl_DbMethodInfo.Flags = 0;
769    AcpiGbl_DbMethodInfo.NumLoops = NumLoops;
770    AcpiGbl_DbMethodInfo.MainThreadGate = MainThreadGate;
771    AcpiGbl_DbMethodInfo.ThreadCompleteGate = ThreadCompleteGate;
772    AcpiGbl_DbMethodInfo.InfoGate = InfoGate;
773
774    /* Init arguments to be passed to method */
775
776    AcpiGbl_DbMethodInfo.InitArgs = 1;
777    AcpiGbl_DbMethodInfo.Args = AcpiGbl_DbMethodInfo.Arguments;
778    AcpiGbl_DbMethodInfo.Arguments[0] = AcpiGbl_DbMethodInfo.NumThreadsStr;
779    AcpiGbl_DbMethodInfo.Arguments[1] = AcpiGbl_DbMethodInfo.IdOfThreadStr;
780    AcpiGbl_DbMethodInfo.Arguments[2] = AcpiGbl_DbMethodInfo.IndexOfThreadStr;
781    AcpiGbl_DbMethodInfo.Arguments[3] = NULL;
782
783    AcpiGbl_DbMethodInfo.Types = AcpiGbl_DbMethodInfo.ArgTypes;
784    AcpiGbl_DbMethodInfo.ArgTypes[0] = ACPI_TYPE_INTEGER;
785    AcpiGbl_DbMethodInfo.ArgTypes[1] = ACPI_TYPE_INTEGER;
786    AcpiGbl_DbMethodInfo.ArgTypes[2] = ACPI_TYPE_INTEGER;
787
788    AcpiDbUint32ToHexString (NumThreads, AcpiGbl_DbMethodInfo.NumThreadsStr);
789
790    Status = AcpiDbExecuteSetup (&AcpiGbl_DbMethodInfo);
791    if (ACPI_FAILURE (Status))
792    {
793        goto CleanupAndExit;
794    }
795
796    /* Get the NS node, determines existence also */
797
798    Status = AcpiGetHandle (NULL, AcpiGbl_DbMethodInfo.Pathname,
799        &AcpiGbl_DbMethodInfo.Method);
800    if (ACPI_FAILURE (Status))
801    {
802        AcpiOsPrintf ("%s Could not get handle for %s\n",
803            AcpiFormatException (Status), AcpiGbl_DbMethodInfo.Pathname);
804        goto CleanupAndExit;
805    }
806
807    /* Create the threads */
808
809    AcpiOsPrintf ("Creating %X threads to execute %X times each\n",
810        NumThreads, NumLoops);
811
812    for (i = 0; i < (NumThreads); i++)
813    {
814        Status = AcpiOsExecute (OSL_DEBUGGER_EXEC_THREAD, AcpiDbMethodThread,
815            &AcpiGbl_DbMethodInfo);
816        if (ACPI_FAILURE (Status))
817        {
818            break;
819        }
820    }
821
822    /* Wait for all threads to complete */
823
824    (void) AcpiOsWaitSemaphore (MainThreadGate, 1, ACPI_WAIT_FOREVER);
825
826    AcpiDbSetOutputDestination (ACPI_DB_DUPLICATE_OUTPUT);
827    AcpiOsPrintf ("All threads (%X) have completed\n", NumThreads);
828    AcpiDbSetOutputDestination (ACPI_DB_CONSOLE_OUTPUT);
829
830CleanupAndExit:
831
832    /* Cleanup and exit */
833
834    (void) AcpiOsDeleteSemaphore (MainThreadGate);
835    (void) AcpiOsDeleteSemaphore (ThreadCompleteGate);
836    (void) AcpiOsDeleteSemaphore (InfoGate);
837
838    AcpiOsFree (AcpiGbl_DbMethodInfo.Threads);
839    AcpiGbl_DbMethodInfo.Threads = NULL;
840}
841