-
Notifications
You must be signed in to change notification settings - Fork 751
/
Copy pathexceptionsupport.c
1318 lines (1119 loc) · 51.5 KB
/
exceptionsupport.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*******************************************************************************
* Copyright (c) 1991, 2022 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#include <string.h>
#include <stdlib.h>
#include "j9cfg.h"
#include "j9consts.h"
#include "omrgcconsts.h"
#include "j9port.h"
#include "j9protos.h"
#include "j9vmnls.h"
#include "objhelp.h"
#include "rommeth.h"
#include "stackwalk.h"
#include "ut_j9vm.h"
#include "vm_internal.h"
#include "ute.h"
/* Default message if no NLS message supplied, or cannot be looked up */
#define NATIVE_MEMORY_OOM_MSG "native memory exhausted"
static void internalSetCurrentExceptionWithCause(J9VMThread *currentThread, UDATA exceptionNumber, UDATA *detailMessage, const char *utfMessage, j9object_t cause);
/* Helper macro for ALWAYS_TRIGGER_J9HOOK_VM_METHOD_RETURN */
#ifdef J9VM_INTERP_NATIVE_SUPPORT
#define HOOK_METHOD_TYPE(walkState) ( ( (walkState)->jitInfo == NULL ) ? 0 : 1 )
#else
#define HOOK_METHOD_TYPE(walkState) ( 0 )
#endif
void
setCurrentExceptionUTF(J9VMThread * vmThread, UDATA exceptionNumber, const char * detailUTF)
{
j9object_t detailString = NULL;
Trc_VM_setCurrentExceptionUTF_Entry(vmThread, exceptionNumber, detailUTF);
vmThread->currentException = NULL;
if ((detailUTF != NULL) && (NULL != J9VMJAVALANGSTRING_OR_NULL(vmThread->javaVM))){
detailString = vmThread->javaVM->memoryManagerFunctions->j9gc_createJavaLangString(vmThread, (U_8 *) detailUTF, (UDATA) strlen(detailUTF), 0);
}
if (vmThread->currentException == NULL) {
setCurrentExceptionWithUtfCause(vmThread, exceptionNumber, (UDATA *) detailString, detailUTF, NULL);
} else {
Trc_VM_setCurrentExceptionUTF_StringAllocFailed(vmThread);
}
Trc_VM_setCurrentExceptionUTF_Exit(vmThread);
}
void
setCurrentExceptionNLS(J9VMThread * vmThread, UDATA exceptionNumber, U_32 moduleName, U_32 messageNumber)
{
PORT_ACCESS_FROM_VMC(vmThread);
const char * msg;
msg = OMRPORT_FROM_J9PORT(PORTLIB)->nls_lookup_message(OMRPORT_FROM_J9PORT(PORTLIB), J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE, moduleName, messageNumber, NULL);
setCurrentExceptionUTF(vmThread, exceptionNumber, msg);
}
void
prepareExceptionUsingClassName(J9VMThread *vmThread, const char *exceptionClassName)
{
J9Class *exceptionClass = NULL;
j9object_t exception = NULL;
prepareForExceptionThrow(vmThread);
exceptionClass = internalFindClassUTF8(
vmThread,
(U_8 *)exceptionClassName,
strlen(exceptionClassName),
vmThread->javaVM->systemClassLoader,
J9_FINDCLASS_FLAG_THROW_ON_FAIL);
/* internalFindClassUTF8 will set an exception on failure. */
if (J9_EXPECTED(NULL != exceptionClass)) {
exception = vmThread->javaVM->memoryManagerFunctions->J9AllocateObject(
vmThread,
exceptionClass,
J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (J9_UNEXPECTED(NULL == exception)) {
setHeapOutOfMemoryError(vmThread);
} else {
vmThread->currentException = exception;
vmThread->privateFlags |= J9_PRIVATE_FLAGS_REPORT_EXCEPTION_THROW;
}
}
}
/**
* Creates exception with nls message; substitutes string values into error message.
*
* @param vmThread current VM thread
* @param nlsModule nls module name
* @param nlsID nls number
* @param exceptionIndex index to exception in vm constant pool
* @param ... arguments to be substituted into error message
*/
void
setCurrentExceptionNLSWithArgs(J9VMThread * vmThread, U_32 nlsModule, U_32 nlsID, UDATA exceptionIndex, ...)
{
va_list stringArgList;
UDATA msgCharLength = 0;
const char *nlsMsgFormat = NULL;
char *msgChars = NULL;
PORT_ACCESS_FROM_VMC(vmThread);
OMRPORT_ACCESS_FROM_J9PORT(PORTLIB);
nlsMsgFormat = omrnls_lookup_message(J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE,
nlsModule,
nlsID,
NULL);
va_start(stringArgList, exceptionIndex);
msgCharLength = j9str_vprintf(NULL, 0, nlsMsgFormat, stringArgList);
va_end(stringArgList);
msgChars = (char *)j9mem_allocate_memory(msgCharLength, J9MEM_CATEGORY_VM);
if (NULL != msgChars) {
va_start(stringArgList, exceptionIndex);
j9str_vprintf(msgChars, msgCharLength, nlsMsgFormat, stringArgList);
va_end(stringArgList);
}
setCurrentExceptionUTF(vmThread, exceptionIndex, msgChars);
j9mem_free_memory(msgChars);
}
static UDATA
decompStackHeadSearch(J9VMThread *currentThread, J9StackWalkState *walkState)
{
if (((UDATA *) walkState->userData1) == walkState->bp) {
/* We're at the catch frame */
return J9_STACKWALK_STOP_ITERATING;
}
return J9_STACKWALK_KEEP_ITERATING;
}
/**
* \brief Correct the decompilation stack of the passed in walkState
*
* @param currentThread current thread
* @param walkState stack walk state to be fixed
* @param rewalkAllWalkedFrames set to true in order to rewalk the same amount of frames as upto the frame of the exceptionHandlerSearch that called us
* @return none
*
* The <code>exceptionHandlerSearch</code> function issues various events that
* might call user callbacks such as jvmti pop frame event. Prior to the
* callback we release vm access which in turn might cause our thread being
* marked for decompilation (for example if a jvmti agent single steps or sets/removes
* a breakpoint). The passed in walkState->decompilationStack will not always be valid
* when we come back.
*
* if (rewalkAllWalkedFrames == FALSE)
* This function walks the top two frames to determine the right decompilation stack head
* and use it to update the passed in walkState->decompilationStack. We do this when we had
* to dropToCurrentFrame prior to issuing an event (read: releasing access which might result
* in class loading, calling out to any jvmti agent which expect the stack to be in the correct shape,
* hence we dropToCurrentFrame so that we match what they expect to see instead of having any
* leftover/special frames ontop). We only need to walk 2 frames to figure out the correct
* decompilation side-stack head.
* else
* In case that the exceptionHandlerSearch stack walk iterator was used for a stack walk ment
* to simply walk the stack and find the catch frame (ie no frame dropping involved). Once we reacquire
* access, we must re-walk the stack for at least as many frames as to reach the catch frame.
*
*/
static void
syncDecompilationStackAfterReleasingVMAccess(J9VMThread *currentThread, J9StackWalkState *walkState, UDATA rewalkAllWalkedFrames)
{
#ifdef J9VM_JIT_FULL_SPEED_DEBUG
if (J9_FSD_ENABLED(currentThread->javaVM)) {
J9StackWalkState ws;
/* Stack walk 2 frames in order to initialize ws.decompilationStack */
ws.skipCount = 0;
ws.walkThread = walkState->walkThread;
if (rewalkAllWalkedFrames) {
/* Rewalk all frames walked during exception handler search */
ws.frameWalkFunction = decompStackHeadSearch;
ws.userData1 = (void *) walkState->bp;
ws.flags = J9_STACKWALK_ITERATE_FRAMES | J9_STACKWALK_SKIP_INLINES | J9_STACKWALK_VISIBLE_ONLY;
} else {
/* Walk only the top frame */
ws.maxFrames = 2;
ws.flags = J9_STACKWALK_COUNT_SPECIFIED ;
}
currentThread->javaVM->walkStackFrames(currentThread, &ws);
/* Update the decomp stack of the passed in walk state with the most upto
* date head record */
walkState->decompilationStack = ws.decompilationStack;
}
#endif
}
/*
* Helper function - check if method has been enabled for tracing
* @return non-zero if the method tracing is enabled, otherwise 0 is returned
*/
UDATA
methodBeingTraced(J9JavaVM *vm, J9Method *method)
{
UDATA rc = FALSE;
if (vm->extendedRuntimeFlags & J9_EXTENDED_RUNTIME_METHOD_TRACE_ENABLED) {
U_8 *pmethodflags = fetchMethodExtendedFlagsPointer(method);
if (J9_RAS_IS_METHOD_TRACED(*pmethodflags)) {
rc = TRUE;
}
}
return rc;
}
/*
Helper function, called for each stack frame. Assumptions:
1) current thread and walk state are passed as parameters.
2) walkState->userData1 is a flags field that controls the walk (input)
3) walkState->userData2 is the handler PC (output, not filled in for JNI catches)
4) walkState->userData3 is a cookie describing the frame type (output)
5) walkState->userData4 is the thrown class (input)
*/
UDATA
exceptionHandlerSearch(J9VMThread *currentThread, J9StackWalkState *walkState)
{
J9JavaVM * vm = walkState->walkThread->javaVM;
Trc_VM_exceptionHandlerSearch_Entry(currentThread);
#ifdef J9VM_INTERP_NATIVE_SUPPORT
if (walkState->jitInfo != NULL) {
if (vm->jitExceptionHandlerSearch(currentThread, walkState) == J9_STACKWALK_STOP_ITERATING) {
Trc_VM_exceptionHandlerSearch_Exit(currentThread, J9_STACKWALK_STOP_ITERATING);
return J9_STACKWALK_STOP_ITERATING;
}
} else
#endif
/* Special frames (natives in particular) do not handle exceptions */
if (!IS_SPECIAL_FRAME_PC(walkState->pc)) {
J9ROMMethod * romMethod;
if (walkState->pc[0] == 0xFF) { /* impdep2 = 0xFF - indicates a JNI call-in frame */
walkState->userData3 = (void *) J9_EXCEPT_SEARCH_JNI_HANDLER;
Trc_VM_exceptionHandlerSearch_Exit(currentThread, J9_STACKWALK_STOP_ITERATING);
return J9_STACKWALK_STOP_ITERATING;
}
romMethod = J9_ROM_METHOD_FROM_RAM_METHOD(walkState->method);
if (J9ROMMETHOD_HAS_EXCEPTION_INFO(romMethod)) {
{
J9ExceptionInfo * eData = J9_EXCEPTION_DATA_FROM_ROM_METHOD(romMethod);
UDATA ranges = eData->catchCount;
if (ranges != 0) {
J9ExceptionHandler * handlerCursor = (J9ExceptionHandler *) (eData + 1);
U_32 deltaPC = (U_32) walkState->bytecodePCOffset;
do {
if ((deltaPC >= handlerCursor->startPC) && (deltaPC < handlerCursor->endPC)) {
if (isExceptionTypeCaughtByHandler(currentThread, walkState->userData4, walkState->constantPool, handlerCursor->exceptionClassIndex, walkState) != 0) {
U_32 handlerPC = handlerCursor->handlerPC;
walkState->userData1 = (void *)(UDATA) handlerPC;
walkState->userData2 = J9_BYTECODE_START_FROM_ROM_METHOD(romMethod) + handlerPC;
walkState->userData3 = (void *)(UDATA) J9_EXCEPT_SEARCH_JAVA_HANDLER;
Trc_VM_exceptionHandlerSearch_Exit(currentThread, J9_STACKWALK_STOP_ITERATING);
return J9_STACKWALK_STOP_ITERATING;
}
}
++handlerCursor;
} while (--ranges != 0);
}
}
}
}
/* Exception not handled in this frame */
if ((((UDATA) walkState->userData1) & J9_EXCEPT_SEARCH_NO_UNWIND) == 0) {
J9StackWalkState tempWalkState;
/* Report the method return and frame pop hooks if necessary */
if (IS_SPECIAL_FRAME_PC(walkState->pc)) {
if (walkState->pc == (U_8 *) J9SF_FRAME_TYPE_JNI_NATIVE_METHOD) {
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
if ((walkState->frameFlags & J9_STACK_FLAGS_JIT_JNI_CALL_OUT_FRAME) == 0)
#endif
{
UDATA traced = methodBeingTraced(vm, walkState->method);
UDATA hooked = J9_EVENT_IS_HOOKED(vm->hookInterface, J9HOOK_VM_NATIVE_METHOD_RETURN);
if (traced || hooked ) {
/* Do not drop to current frame here:
*
* 1) The native method is guaranteed to be the top frame
* 2) The stack must be left alone to ensure consistency of the JNI refs and stack frame flags
*/
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, walkState->restartException);
tempWalkState.previous = currentThread->stackWalkState;
currentThread->stackWalkState = &tempWalkState;
if (traced) {
UTSI_TRACEMETHODEXIT_FROMVM(vm, currentThread, walkState->method, walkState->restartException, NULL, 0);
}
if (hooked) {
ALWAYS_TRIGGER_J9HOOK_VM_NATIVE_METHOD_RETURN(vm->hookInterface, currentThread, walkState->method, TRUE, NULL, NULL);
}
currentThread->stackWalkState = tempWalkState.previous;
walkState->restartException = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
#ifdef J9VM_JIT_FULL_SPEED_DEBUG
walkState->decompilationStack = walkState->walkThread->decompilationStack;
#endif
}
}
/* The stack will be dropped before any further events are reported or classes are loaded,
* so the JNI cleanup code must be run before continuing the unwind. Note that this can happen
* only once per walk, since the exception will be caught by a JNI call-in frame before another JNI
* native method frame could be seen.
*/
returnFromJNI(currentThread, walkState->bp);
}
} else {
UDATA traced = methodBeingTraced(vm, walkState->method);
UDATA hooked = J9_EVENT_IS_HOOKED(vm->hookInterface, J9HOOK_VM_NATIVE_METHOD_RETURN);
if (traced || hooked) {
walkState->dropToCurrentFrame(walkState);
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, walkState->restartException);
tempWalkState.previous = currentThread->stackWalkState;
currentThread->stackWalkState = &tempWalkState;
if (traced) {
UTSI_TRACEMETHODEXIT_FROMVM(vm, currentThread, walkState->method, walkState->restartException, NULL, HOOK_METHOD_TYPE(walkState) );
}
if (hooked) {
ALWAYS_TRIGGER_J9HOOK_VM_METHOD_RETURN(vm->hookInterface, currentThread, walkState->method, TRUE, NULL, HOOK_METHOD_TYPE(walkState) );
}
currentThread->stackWalkState = tempWalkState.previous;
walkState->restartException = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
syncDecompilationStackAfterReleasingVMAccess(currentThread, walkState, FALSE);
}
#ifdef J9VM_INTERP_NATIVE_SUPPORT
if (walkState->jitInfo != NULL) {
#ifdef J9VM_JIT_FULL_SPEED_DEBUG
J9JITDecompilationInfo *decompilationRecord = walkState->decompilationRecord;
if ((NULL != decompilationRecord) && (decompilationRecord->reason & JITDECOMP_FRAME_POP_NOTIFICATION)) {
if (J9_EVENT_IS_HOOKED(vm->hookInterface, J9HOOK_VM_FRAME_POP)) {
walkState->dropToCurrentFrame(walkState);
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, walkState->restartException);
tempWalkState.previous = currentThread->stackWalkState;
currentThread->stackWalkState = &tempWalkState;
ALWAYS_TRIGGER_J9HOOK_VM_FRAME_POP(vm->hookInterface, currentThread, walkState->method, TRUE);
currentThread->stackWalkState = tempWalkState.previous;
walkState->restartException = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
syncDecompilationStackAfterReleasingVMAccess(currentThread, walkState, FALSE);
}
}
#endif
} else
#endif
{
if (*walkState->bp & J9SF_A0_REPORT_FRAME_POP_TAG) {
if (J9_EVENT_IS_HOOKED(vm->hookInterface, J9HOOK_VM_FRAME_POP)) {
walkState->dropToCurrentFrame(walkState);
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, walkState->restartException);
tempWalkState.previous = currentThread->stackWalkState;
currentThread->stackWalkState = &tempWalkState;
ALWAYS_TRIGGER_J9HOOK_VM_FRAME_POP(vm->hookInterface, currentThread, walkState->method, TRUE);
currentThread->stackWalkState = tempWalkState.previous;
walkState->restartException = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
syncDecompilationStackAfterReleasingVMAccess(currentThread, walkState, FALSE);
}
}
}
{
J9ROMMethod * romMethod = J9_ROM_METHOD_FROM_RAM_METHOD(walkState->method);
/* Exit the monitor for synchronized methods */
if (romMethod->modifiers & J9AccSynchronized) {
j9object_t syncObject;
#ifdef J9VM_INTERP_NATIVE_SUPPORT
if (walkState->jitInfo != NULL) {
if (romMethod->modifiers & J9AccStatic) {
J9Class *syncClass = walkState->constantPool->ramClass;
syncObject = J9VM_J9CLASS_TO_HEAPCLASS(syncClass);
} else {
syncObject = *((j9object_t*) walkState->arg0EA);
}
} else
#endif
{
syncObject = (j9object_t) (walkState->bp[1]);
}
if (objectMonitorExit(currentThread, syncObject) != 0) {
j9object_t ime;
J9StackWalkState tempWalkState;
walkState->dropToCurrentFrame(walkState);
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, walkState->restartException);
tempWalkState.previous = currentThread->stackWalkState;
currentThread->stackWalkState = &tempWalkState;
setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGILLEGALMONITORSTATEEXCEPTION, NULL);
currentThread->stackWalkState = tempWalkState.previous;
ime = currentThread->currentException;
walkState->restartException = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
if (ime != NULL) {
currentThread->currentException = NULL;
walkState->restartException = ime;
walkState->userData4 = J9OBJECT_CLAZZ(currentThread, ime);
}
syncDecompilationStackAfterReleasingVMAccess(currentThread, walkState, FALSE);
}
}
}
}
}
Trc_VM_exceptionHandlerSearch_Exit(currentThread, J9_STACKWALK_KEEP_ITERATING);
return J9_STACKWALK_KEEP_ITERATING;
}
UDATA
isExceptionTypeCaughtByHandler(J9VMThread *currentThread, J9Class *thrownExceptionClass, J9ConstantPool *constantPool, UDATA handlerIndex, J9StackWalkState *walkState)
{
J9Class * caughtExceptionClass;
UDATA caughtDepth;
UDATA thrownDepth;
/* Handler index 0 means catch all */
if (handlerIndex == 0) {
return TRUE;
}
/* Get the caught class - might not be loaded yet */
caughtExceptionClass = ((J9RAMClassRef *) (constantPool + handlerIndex))->value;
if (caughtExceptionClass == NULL) {
J9StackWalkState tempWalkState;
if ((((UDATA) walkState->userData1) & J9_EXCEPT_SEARCH_NO_UNWIND) == 0) {
walkState->dropToCurrentFrame(walkState);
}
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, walkState->restartException);
tempWalkState.previous = currentThread->stackWalkState;
currentThread->stackWalkState = &tempWalkState;
caughtExceptionClass = resolveClassRef(currentThread, constantPool, handlerIndex, J9_RESOLVE_FLAG_RUNTIME_RESOLVE);
currentThread->stackWalkState = tempWalkState.previous;
walkState->restartException = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
if ((((UDATA) walkState->userData1) & J9_EXCEPT_SEARCH_NO_UNWIND) == 0) {
syncDecompilationStackAfterReleasingVMAccess(currentThread, walkState, FALSE);
} else {
syncDecompilationStackAfterReleasingVMAccess(currentThread, walkState, TRUE);
}
/* If we were unable to load the class, then we can only say that the exception is not caught */
if (caughtExceptionClass == NULL) {
currentThread->currentException = NULL;
return FALSE;
}
}
/* See if thrown class is compatible with caught class */
if (caughtExceptionClass == thrownExceptionClass) {
return TRUE;
}
caughtDepth = J9CLASS_DEPTH(caughtExceptionClass);
thrownDepth = J9CLASS_DEPTH(thrownExceptionClass);
if (thrownDepth <= caughtDepth) {
return FALSE;
}
return thrownExceptionClass->superclasses[caughtDepth] == caughtExceptionClass;
}
void
setCurrentException(J9VMThread *currentThread, UDATA exceptionNumber, UDATA *detailMessage)
{
setCurrentExceptionWithUtfCause(currentThread, exceptionNumber, detailMessage, NULL, NULL);
}
/**
* Creates exception with its cause and detailed message
*
* @param currentThread
* @param exceptionNumber
* @param detailMessage
* @param cause
*
*/
static void
internalSetCurrentExceptionWithCause(J9VMThread *currentThread, UDATA exceptionNumber, UDATA *detailMessage, const char *utfMessage, j9object_t cause)
{
UDATA index = 0;
UDATA * preservedMessage = NULL;
UDATA resetOutOfMemory = 0;
j9object_t exception = NULL;
J9Class * exceptionClass = NULL;
UDATA constructorIndex = 0;
UDATA exceptionFlags = 0;
index = exceptionNumber & J9_EXCEPTION_INDEX_MASK;
constructorIndex = exceptionNumber & J9_EX_CTOR_TYPE_MASK;
Trc_VM_setCurrentException_Entry(currentThread, index, constructorIndex, detailMessage);
/* Clear the current exception so that it doesn't get re-triggered while loading more exception classes */
currentThread->currentException = NULL;
currentThread->privateFlags &= ~J9_PRIVATE_FLAGS_REPORT_EXCEPTION_THROW;
/* Preserve cause object */
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, cause);
/* Preserve the detail message object (if it is an object) */
switch (constructorIndex) {
case J9_EX_CTOR_INT:
case J9_EX_CTOR_CLASS_CLASS:
preservedMessage = NULL;
break;
default:
preservedMessage = detailMessage;
break;
}
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, (j9object_t) preservedMessage);
if (J9VMCONSTANTPOOL_JAVALANGUNSUPPORTEDCLASSVERSIONERROR == index) {
J9JavaVM *vm = currentThread->javaVM;
if (J9_ARE_NO_BITS_SET(vm->extendedRuntimeFlags, J9_EXTENDED_RUNTIME_CLASS_OBJECT_ASSIGNED)) {
/* This is JVM startup stage, exit with message now. */
PORT_ACCESS_FROM_JAVAVM(vm);
j9tty_err_printf(PORTLIB, "%s\n", utfMessage);
goto done;
}
}
#ifdef J9VM_INTERP_GROWABLE_STACKS
/* If we are throwing StackOverflowError for the first time in this thread, grow the stack once more */
if (index == J9VMCONSTANTPOOL_JAVALANGSTACKOVERFLOWERROR) {
J9JavaVM * vm = currentThread->javaVM;
UDATA stackSize = vm->stackSize + OMR_MAX(J9_STACK_OVERFLOW_AND_HEADER_SIZE, vm->stackSizeIncrement);
if (currentThread->stackObject->size < stackSize) {
growJavaStack(currentThread, stackSize);
}
if (J9_ARE_NO_BITS_SET(currentThread->privateFlags, J9_PRIVATE_FLAGS_STACK_OVERFLOW)) {
exceptionFlags |= J9_PRIVATE_FLAGS_STACK_OVERFLOW;
}
}
#endif
/* Keep track of the fact that an exception is being constructed */
if (J9_ARE_NO_BITS_SET(currentThread->privateFlags, J9_PRIVATE_FLAGS_CONSTRUCTING_EXCEPTION)) {
exceptionFlags |= J9_PRIVATE_FLAGS_CONSTRUCTING_EXCEPTION;
}
currentThread->privateFlags |= exceptionFlags;
/* Handle OutOfMemory specially
*
* To prevent recursion of OOM being called, following three states are in effect.
*
* OOM_STATE_1 = First OOM. Construct OOM. Set currentThread->privateFlags |= J9_PRIVATE_FLAGS_OUT_OF_MEMORY
* OOM_STATE_2 = Already throwing OOM. Use cached OOM and call exception constructor (internalSendExceptionConstructor)
* and set currentThread->privateFlags |= J9_PRIVATE_FLAGS_FINAL_CALL_OUT_OF_MEMORY
* OOM_STATE_3 = Already throwing cached OOM. Skip calling the constructor and just throw the exception.
*
*/
resetOutOfMemory = FALSE;
currentThread->privateFlags &= ~J9_PRIVATE_FLAGS_FILL_EXISTING_TRACE;
if (index == J9VMCONSTANTPOOL_JAVALANGOUTOFMEMORYERROR) {
J9JavaVM * vm = currentThread->javaVM;
/* If java.lang.Class has not yet been loaded, don't try to allocate the exception - just bail */
if (J9VMJAVALANGCLASS_OR_NULL(vm) == NULL) {
Trc_VM_setCurrentException_ClassNotLoaded(currentThread);
Assert_VM_fatalOOM();
/* Execution never reaches this point */
}
if (J9_EVENT_IS_HOOKED(vm->hookInterface, J9HOOK_VM_RESOURCE_EXHAUSTED)) {
UDATA resourceTypes;
/* The caller might have specified OOM exception type bits */
resourceTypes = exceptionNumber & J9_EX_OOM_TYPE_MASK;
/* No bits specified, we are dealing with a regular Java Heap OOM */
if (resourceTypes == 0) {
resourceTypes = J9_EX_OOM_JAVA_HEAP;
}
ALWAYS_TRIGGER_J9HOOK_VM_RESOURCE_EXHAUSTED(vm->hookInterface, currentThread, resourceTypes, utfMessage);
}
/* OOM_STATE_2 : If we're already throwing OutOfMemory, use the cached Throwable */
if (currentThread->privateFlags & J9_PRIVATE_FLAGS_OUT_OF_MEMORY) {
j9object_t walkback;
throwOutOfMemory:
exception = currentThread->outOfMemoryError;
if (exception == NULL) {
Trc_VM_setCurrentException_NoCachedOOM(currentThread);
Assert_VM_fatalOOM();
/* Execution never reaches this point */
}
/* Check whether we are in OOM_STATE_2 or OOM_STATE_3 */
if (currentThread->privateFlags & J9_PRIVATE_FLAGS_FINAL_CALL_OUT_OF_MEMORY) {
/* OOM_STATE_3 */
currentThread->currentException = exception;
DROP_OBJECT_IN_SPECIAL_FRAME(currentThread); /* preservedMessage */
DROP_OBJECT_IN_SPECIAL_FRAME(currentThread); /* cause */
goto done;
}
/* OOM_STATE_2 */
currentThread->privateFlags |= J9_PRIVATE_FLAGS_FINAL_CALL_OUT_OF_MEMORY;
/* If there's a walkback object in the Throwable, zero it */
exceptionClass = J9OBJECT_CLAZZ(currentThread, exception);
walkback = J9VMJAVALANGTHROWABLE_WALKBACK(currentThread, exception);
if (walkback != NULL) {
U_32 i;
for (i = 0; i < J9INDEXABLEOBJECT_SIZE(currentThread, walkback); i++) {
J9JAVAARRAYOFUDATA_STORE(currentThread, walkback, i, 0);
}
currentThread->privateFlags |= J9_PRIVATE_FLAGS_FILL_EXISTING_TRACE;
}
goto sendConstructor;
}
/* OOM_STATE_1 */
currentThread->privateFlags |= J9_PRIVATE_FLAGS_OUT_OF_MEMORY;
resetOutOfMemory = TRUE;
}
/* Get the class of the exception, loading the class if necessary.
* Fetch known class fatal exits if the class cannot be found.
*/
exceptionClass = internalFindKnownClass(currentThread, index, J9_FINDKNOWNCLASS_FLAG_INITIALIZE | J9_FINDKNOWNCLASS_FLAG_NON_FATAL);
if (exceptionClass == NULL) {
Trc_VM_setCurrentException_UnableToLoadExceptionClass(currentThread);
DROP_OBJECT_IN_SPECIAL_FRAME(currentThread); /* preservedMessage */
DROP_OBJECT_IN_SPECIAL_FRAME(currentThread); /* cause */
/* Exception class could not be loaded/initialized - there should be an exception pending now, if not, throw OOM */
if (currentThread->currentException == NULL) {
Trc_VM_setCurrentException_NoExceptionPending(currentThread);
setHeapOutOfMemoryError(currentThread);
}
goto done;
}
/* Make an instance of the exception class */
exception = currentThread->javaVM->memoryManagerFunctions->J9AllocateObject(
currentThread, exceptionClass, J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (exception == NULL) {
Trc_VM_setCurrentException_UnableToAllocateException(currentThread);
goto throwOutOfMemory;
}
/* Construct the exception */
sendConstructor:
switch (constructorIndex) {
case J9_EX_CTOR_INT:
case J9_EX_CTOR_CLASS_CLASS:
break;
default:
detailMessage = *((UDATA **) (currentThread->sp));
break;
}
/* Look up and call the exception constructor */
*((j9object_t*) (currentThread->sp)) = exception;
internalSendExceptionConstructor(currentThread, exceptionClass, exception, (j9object_t) detailMessage, constructorIndex);
currentThread->privateFlags &= ~J9_PRIVATE_FLAGS_FILL_EXISTING_TRACE;
exception = POP_OBJECT_IN_SPECIAL_FRAME(currentThread); /* preservedMessage */
/* Retrieve the cause, and if it's not NULL, set it in the exception */
cause = POP_OBJECT_IN_SPECIAL_FRAME(currentThread); /* cause */
if (currentThread->currentException == NULL) {
if (cause != NULL) {
sendInitCause(currentThread, (j9object_t) exception, cause);
exception = (j9object_t) currentThread->returnValue; /* initCause returns the receiver */
}
} else {
Trc_VM_setCurrentException_ExceptionDuringConstructor(currentThread);
}
/* If no exception occurred during construction, report systhrow for the new exception */
if (currentThread->currentException == NULL) {
j9object_t localException = (j9object_t) exception;
TRIGGER_J9HOOK_VM_EXCEPTION_SYSTHROW(currentThread->javaVM->hookInterface, currentThread, localException);
currentThread->currentException = localException;
currentThread->privateFlags |= J9_PRIVATE_FLAGS_REPORT_EXCEPTION_THROW;
} else {
Trc_VM_setCurrentException_ExceptionDuringConstructor(currentThread);
}
done:
/* Reset the recursion-prevention flags */
if (resetOutOfMemory) {
currentThread->privateFlags &= ~J9_PRIVATE_FLAGS_OUT_OF_MEMORY;
currentThread->privateFlags &= ~J9_PRIVATE_FLAGS_FINAL_CALL_OUT_OF_MEMORY;
}
currentThread->privateFlags &= ~exceptionFlags;
Trc_VM_setCurrentException_Exit(currentThread);
}
typedef struct J9RedirectedSetCurrentExceptionWithCauseArgs {
J9VMThread *currentThread;
UDATA exceptionNumber;
UDATA *detailMessage;
const char *utfMessage;
j9object_t cause;
} J9RedirectedSetCurrentExceptionWithCauseArgs;
/**
* This is an helper function to call internalSetCurrentExceptionWithCause indirectly from gpProtectAndRun function.
*
* @param entryArg Argument structure (J9RedirectedSetCurrentExceptionWithCauseArgs).
*/
static UDATA
gpProtectedSetCurrentExceptionWithCause(void *entryArg)
{
J9RedirectedSetCurrentExceptionWithCauseArgs *args = (J9RedirectedSetCurrentExceptionWithCauseArgs *) entryArg;
internalSetCurrentExceptionWithCause(args->currentThread, args->exceptionNumber, args->detailMessage, args->utfMessage, args->cause);
return 0; /* return value required to conform to port library definition */
}
/**
* This function makes sure that call to "internalSetCurrentExceptionWithCause" is gpProtected
*
* @param currentThread
* @param exceptionNumber
* @param detailMessage
* @param cause
*
*/
void
setCurrentExceptionWithCause(J9VMThread *currentThread, UDATA exceptionNumber, UDATA *detailMessage, j9object_t cause)
{
setCurrentExceptionWithUtfCause(currentThread, exceptionNumber, detailMessage, NULL, cause);
}
void
setCurrentExceptionWithUtfCause(J9VMThread *currentThread, UDATA exceptionNumber, UDATA *detailMessage, const char *utfMessage, j9object_t cause)
{
if (currentThread->gpProtected) {
internalSetCurrentExceptionWithCause(currentThread, exceptionNumber, detailMessage, utfMessage, cause);
} else {
J9RedirectedSetCurrentExceptionWithCauseArgs handlerArgs;
handlerArgs.currentThread = currentThread;
handlerArgs.exceptionNumber = exceptionNumber;
handlerArgs.detailMessage = detailMessage;
handlerArgs.utfMessage = utfMessage;
handlerArgs.cause = cause;
gpProtectAndRun(gpProtectedSetCurrentExceptionWithCause, (JNIEnv *)currentThread, &handlerArgs);
}
}
j9object_t
walkStackForExceptionThrow(J9VMThread * currentThread, j9object_t exception, UDATA walkOnly)
{
J9StackWalkState * walkState = currentThread->stackWalkState;
/* NOTE: This helper must use the current thread's current walk state, not a C stack-allocated one */
walkState->skipCount = 0;
walkState->frameWalkFunction = exceptionHandlerSearch;
walkState->userData1 = (void *)(UDATA) (walkOnly ? J9_EXCEPT_SEARCH_NO_UNWIND : 0);
walkState->userData2 = NULL;
walkState->userData3 = (void *)(UDATA) J9_EXCEPT_SEARCH_NO_HANDLER;
walkState->userData4 = J9OBJECT_CLAZZ(currentThread, exception);
walkState->restartException = exception;
walkState->walkThread = currentThread;
walkState->flags = J9_STACKWALK_ITERATE_FRAMES | J9_STACKWALK_SKIP_INLINES | J9_STACKWALK_VISIBLE_ONLY;
if (!walkOnly) {
walkState->flags |= (J9_STACKWALK_INCLUDE_CALL_IN_FRAMES | J9_STACKWALK_INCLUDE_NATIVES | J9_STACKWALK_MAINTAIN_REGISTER_MAP);
}
/* PR 81484: Clear jitStackFrameFlags before the walk.
* 1) It is not used by the stack walker.
* 2) It could affect code that runs to load exception classes during the walk.
*/
currentThread->jitStackFrameFlags = 0;
currentThread->javaVM->walkStackFrames(currentThread, walkState);
return walkState->restartException;
}
void
setClassCastException(J9VMThread *currentThread, J9Class * instanceClass, J9Class * castClass)
{
J9ClassCastParms detailMessage;
detailMessage.instanceClass = instanceClass;
detailMessage.castClass = castClass;
setCurrentException(currentThread, J9_EX_CTOR_CLASS_CLASS + J9VMCONSTANTPOOL_JAVALANGCLASSCASTEXCEPTION, (UDATA *) &detailMessage);
}
void
setNegativeArraySizeException(J9VMThread *currentThread, I_32 size)
{
PORT_ACCESS_FROM_VMC(currentThread);
char buffer[15];
j9str_printf(PORTLIB, buffer, sizeof(buffer), "%d", size);
setCurrentExceptionUTF(currentThread, J9VMCONSTANTPOOL_JAVALANGNEGATIVEARRAYSIZEEXCEPTION, buffer);
}
void
setClassLoadingConstraintError(J9VMThread * currentThread, J9ClassLoader * initiatingLoader, J9Class * existingClass)
{
PORT_ACCESS_FROM_VMC(currentThread);
char * msg = NULL;
const char * nlsMessage = j9nls_lookup_message(J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE, J9NLS_VM_LOADING_CONSTRAINT_VIOLATION, NULL);
if (nlsMessage != NULL) {
j9object_t initiatingLoaderObject = initiatingLoader->classLoaderObject;
J9Class * initiatingLoaderClass = J9OBJECT_CLAZZ(currentThread, initiatingLoaderObject);
J9UTF8 * initiatingLoaderClassNameUTF = J9ROMCLASS_CLASSNAME(initiatingLoaderClass->romClass);
U_16 initiatingLoaderClassNameLength = J9UTF8_LENGTH(initiatingLoaderClassNameUTF);
U_8 * initiatingLoaderClassName = J9UTF8_DATA(initiatingLoaderClassNameUTF);
I_32 initiatingLoaderHash = objectHashCode(currentThread->javaVM, initiatingLoaderObject);
J9ClassLoader * definingLoader = existingClass->classLoader;
j9object_t definingLoaderObject = definingLoader->classLoaderObject;
J9Class * definingLoaderClass = J9OBJECT_CLAZZ(currentThread, definingLoaderObject);
J9UTF8 * definingLoaderClassNameUTF = J9ROMCLASS_CLASSNAME(definingLoaderClass->romClass);
U_16 definingLoaderClassNameLength = J9UTF8_LENGTH(definingLoaderClassNameUTF);
U_8 * definingLoaderClassName = J9UTF8_DATA(definingLoaderClassNameUTF);
I_32 definingLoaderHash = objectHashCode(currentThread->javaVM, definingLoaderObject);
J9UTF8 * existingClassNameUTF = J9ROMCLASS_CLASSNAME(existingClass->romClass);
U_16 existingClassNameLength = J9UTF8_LENGTH(existingClassNameUTF);
U_8 * existingClassName = J9UTF8_DATA(existingClassNameUTF);
UDATA msgLen = j9str_printf(PORTLIB, NULL, 0, nlsMessage,
initiatingLoaderClassNameLength, initiatingLoaderClassName, initiatingLoaderHash,
existingClassNameLength, existingClassName,
definingLoaderClassNameLength, definingLoaderClassName, definingLoaderHash);
msg = j9mem_allocate_memory(msgLen, OMRMEM_CATEGORY_VM);
/* msg NULL check omitted since str_printf accepts NULL (as above) */
j9str_printf(PORTLIB, msg, msgLen, nlsMessage,
initiatingLoaderClassNameLength, initiatingLoaderClassName, initiatingLoaderHash,
existingClassNameLength, existingClassName,
definingLoaderClassNameLength, definingLoaderClassName, definingLoaderHash);
}
setCurrentExceptionUTF(currentThread, J9VMCONSTANTPOOL_JAVALANGLINKAGEERROR, msg);
j9mem_free_memory(msg);
}
void
setClassLoadingConstraintSignatureError(J9VMThread *currentThread, J9ClassLoader *loader1, J9Class *class1, J9ClassLoader *loader2, J9Class *class2, J9Class *exceptionClass, U_8 *methodName, UDATA methodNameLength, U_8 *signature, UDATA signatureLength)
{
PORT_ACCESS_FROM_VMC(currentThread);
char * msg = NULL;
const char * nlsMessage = j9nls_lookup_message(J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE, J9NLS_VM_LOADING_CONSTRAINT_SIG_VIOLATION, NULL);
if (nlsMessage != NULL) {
/* Loader1 name and length */
j9object_t loader1Object = loader1->classLoaderObject;
J9Class * loader1Class = J9OBJECT_CLAZZ(currentThread, loader1Object);
J9UTF8 * loader1ClassNameUTF = J9ROMCLASS_CLASSNAME(loader1Class->romClass);
U_16 loader1ClassNameLength = J9UTF8_LENGTH(loader1ClassNameUTF);
U_8 * loader1ClassName = J9UTF8_DATA(loader1ClassNameUTF);
I_32 loader1Hash = objectHashCode(currentThread->javaVM, loader1Object);
/* Loader2 name and length */
j9object_t loader2Object = loader2->classLoaderObject;
J9Class * loader2Class = J9OBJECT_CLAZZ(currentThread, loader2Object);
J9UTF8 * loader2ClassNameUTF = J9ROMCLASS_CLASSNAME(loader2Class->romClass);
U_16 loader2ClassNameLength = J9UTF8_LENGTH(loader2ClassNameUTF);
U_8 * loader2ClassName = J9UTF8_DATA(loader2ClassNameUTF);
I_32 loader2Hash = objectHashCode(currentThread->javaVM, loader2Object);
/* Class1 name and length */
J9UTF8 * class1NameUTF = J9ROMCLASS_CLASSNAME(class1->romClass);
U_16 class1ClassNameLength = J9UTF8_LENGTH(class1NameUTF);
U_8 * class1ClassName = J9UTF8_DATA(class1NameUTF);
/* Class2 name and length */
J9UTF8 * class2NameUTF = J9ROMCLASS_CLASSNAME(class2->romClass);
U_16 class2ClassNameLength = J9UTF8_LENGTH(class2NameUTF);
U_8 * class2ClassName = J9UTF8_DATA(class2NameUTF);
/* ExceptionClass name and length */
J9UTF8 * exceptionClassNameUTF = J9ROMCLASS_CLASSNAME(exceptionClass->romClass);
U_16 exceptionClassNameLength = J9UTF8_LENGTH(exceptionClassNameUTF);
U_8 * exceptionClassName = J9UTF8_DATA(exceptionClassNameUTF);
UDATA msgLen = j9str_printf(PORTLIB, NULL, 0, nlsMessage,
exceptionClassNameLength, exceptionClassName,
methodNameLength, methodName,
signatureLength, signature,
loader1ClassNameLength, loader1ClassName, loader1Hash,
class1ClassNameLength, class1ClassName,
loader2ClassNameLength, loader2ClassName, loader2Hash,
class2ClassNameLength, class2ClassName
);
msg = j9mem_allocate_memory(msgLen, OMRMEM_CATEGORY_VM);
/* msg NULL check omitted since str_printf accepts NULL (as above) */
j9str_printf(PORTLIB, msg, msgLen, nlsMessage,
exceptionClassNameLength, exceptionClassName,
methodNameLength, methodName,
signatureLength, signature,
loader1ClassNameLength, loader1ClassName, loader1Hash,
class1ClassNameLength, class1ClassName,
loader2ClassNameLength, loader2ClassName, loader2Hash,
class2ClassNameLength, class2ClassName
);
}
setCurrentExceptionUTF(currentThread, J9VMCONSTANTPOOL_JAVALANGLINKAGEERROR, msg);
j9mem_free_memory(msg);
}
void
setClassLoadingConstraintOverrideError(J9VMThread *currentThread, J9UTF8 *newClassNameUTF, J9ClassLoader *loader1, J9UTF8 *class1NameUTF, J9ClassLoader *loader2, J9UTF8 *class2NameUTF, J9UTF8 *exceptionClassNameUTF, U_8 *methodName, UDATA methodNameLength, U_8 *signature, UDATA signatureLength)
{
PORT_ACCESS_FROM_VMC(currentThread);
char * msg = NULL;
const char * nlsMessage = j9nls_lookup_message(J9NLS_DO_NOT_PRINT_MESSAGE_TAG | J9NLS_DO_NOT_APPEND_NEWLINE, J9NLS_VM_LOADING_CONSTRAINT_OVERRIDE_VIOLATION, NULL);
if (nlsMessage != NULL) {
/* Loader1 name and length */
j9object_t loader1Object = loader1->classLoaderObject;
J9Class * loader1Class = J9OBJECT_CLAZZ(currentThread, loader1Object);
J9UTF8 * loader1ClassNameUTF = J9ROMCLASS_CLASSNAME(loader1Class->romClass);
U_16 loader1ClassNameLength = J9UTF8_LENGTH(loader1ClassNameUTF);
U_8 * loader1ClassName = J9UTF8_DATA(loader1ClassNameUTF);
I_32 loader1Hash = objectHashCode(currentThread->javaVM, loader1Object);
/* Loader2 name and length */
j9object_t loader2Object = loader2->classLoaderObject;
J9Class * loader2Class = J9OBJECT_CLAZZ(currentThread, loader2Object);
J9UTF8 * loader2ClassNameUTF = J9ROMCLASS_CLASSNAME(loader2Class->romClass);
U_16 loader2ClassNameLength = J9UTF8_LENGTH(loader2ClassNameUTF);
U_8 * loader2ClassName = J9UTF8_DATA(loader2ClassNameUTF);
I_32 loader2Hash = objectHashCode(currentThread->javaVM, loader2Object);
/* Class1 name and length */
U_16 class1ClassNameLength = J9UTF8_LENGTH(class1NameUTF);