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
|
//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
// StubMgr.h
//
//
// The stub manager exists so that the debugger can accurately step through
// the myriad stubs & wrappers which exist in the EE, without imposing undue
// overhead on the stubs themselves.
//
// Each type of stub (except those which the debugger can treat as atomic operations)
// needs to have a stub manager to represent it. The stub manager is responsible for
// (a) identifying the stub as such, and
// (b) tracing into the stub & reporting what the stub will call. This
// report can consist of
// (i) a managed code address
// (ii) an unmanaged code address
// (iii) another stub address
// (iv) a "frame patch" address - that is, an address in the stub,
// which the debugger can patch. When the patch is hit, the debugger
// will query the topmost frame to trace itself. (Thus this is
// a way of deferring the trace logic to the frame which the stub
// will push.)
//
// The set of stub managers is extensible, but should be kept to a reasonable number
// as they are currently linearly searched & queried for each stub.
//
#ifndef __stubmgr_h__
#define __stubmgr_h__
#include "simplerwlock.hpp"
// When 'TraceStub' returns, it gives the address of where the 'target' is for a stub'
// TraceType indicates what this 'target' is
enum TraceType
{
TRACE_ENTRY_STUB, // Stub goes to an unmanaged entry stub
TRACE_STUB, // Stub goes to another stub
TRACE_UNMANAGED, // Stub goes to unmanaged code
TRACE_MANAGED, // Stub goes to Jitted code
TRACE_UNJITTED_METHOD, // Is the prestub, since there is no code, the address will actually be a MethodDesc*
TRACE_FRAME_PUSH, // Don't know where stub goes, stop at address, and then ask the frame that is on the stack
TRACE_MGR_PUSH, // Don't know where stub goes, stop at address then call TraceManager() below to find out
TRACE_OTHER // We are going somewhere you can't step into (eg. ee helper function)
};
class StubManager;
class SString;
class DebuggerRCThread;
enum StubCodeBlockKind : int;
// A TraceDestination describes where code is going to call. This can be used by the Debugger's Step-In functionality
// to skip through stubs and place a patch directly at a call's target.
// TD are supplied by the stubmanagers.
class TraceDestination
{
public:
friend class DebuggerRCThread;
TraceDestination() { }
#ifdef _DEBUG
// Get a string representation of this TraceDestination
// Uses the supplied buffer to store the memory (or may return a string literal).
// This will also print the TD's arguments.
const WCHAR * DbgToString(SString &buffer);
#endif
// Initialize for unmanaged code.
// The addr is in unmanaged code. Used for Step-in from managed to native.
void InitForUnmanaged(PCODE addr)
{
STATIC_CONTRACT_SO_TOLERANT;
this->type = TRACE_UNMANAGED;
this->address = addr;
this->stubManager = NULL;
}
// The addr is inside jitted code (eg, there's a JitManaged that will claim it)
void InitForManaged(PCODE addr)
{
STATIC_CONTRACT_SO_TOLERANT;
this->type = TRACE_MANAGED;
this->address = addr;
this->stubManager = NULL;
}
// Initialize for an unmanaged entry stub.
void InitForUnmanagedStub(PCODE addr)
{
STATIC_CONTRACT_SO_TOLERANT;
this->type = TRACE_ENTRY_STUB;
this->address = addr;
this->stubManager = NULL;
}
// Initialize for a stub.
void InitForStub(PCODE addr)
{
STATIC_CONTRACT_SO_TOLERANT;
this->type = TRACE_STUB;
this->address = addr;
this->stubManager = NULL;
}
// Init for a managed unjitted method.
// This will place an IL patch that will get bound when the debugger gets a Jit complete
// notification for this method.
// If pDesc is a wrapper methoddesc, we will unwrap it.
void InitForUnjittedMethod(MethodDesc * pDesc);
// Place a patch at the given addr, and then when it's hit,
// call pStubManager->TraceManager() to get the next TraceDestination.
void InitForManagerPush(PCODE addr, StubManager * pStubManager)
{
STATIC_CONTRACT_SO_TOLERANT;
this->type = TRACE_MGR_PUSH;
this->address = addr;
this->stubManager = pStubManager;
}
// Place a patch at the given addr, and then when it's hit
// call GetThread()->GetFrame()->TraceFrame() to get the next TraceDestination.
// This address must be safe to run a callstack at.
void InitForFramePush(PCODE addr)
{
this->type = TRACE_FRAME_PUSH;
this->address = addr;
this->stubManager = NULL;
}
// Nobody recognized the target address. We will not be able to step-in to it.
// This is ok if the target just calls into mscorwks (such as an Fcall) because
// there's no managed code to step in to, and we don't support debugging the CLR
// itself, so there's no native code to step into either.
void InitForOther(PCODE addr)
{
this->type = TRACE_OTHER;
this->address = addr;
this->stubManager = NULL;
}
// Accessors
TraceType GetTraceType() { return type; }
PCODE GetAddress()
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(type != TRACE_UNJITTED_METHOD);
return address;
}
MethodDesc* GetMethodDesc()
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(type == TRACE_UNJITTED_METHOD);
return pDesc;
}
StubManager * GetStubManager()
{
return stubManager;
}
// Expose this b/c DebuggerPatchTable::AddPatchForAddress() needs it.
// Ideally we'd get rid of this.
void Bad_SetTraceType(TraceType t)
{
this->type = t;
}
private:
TraceType type; // The kind of code the stub is going to
PCODE address; // Where the stub is going
StubManager *stubManager; // The manager that claims this stub
MethodDesc *pDesc;
};
// For logging
#ifdef LOGGING
void LogTraceDestination(const char * szHint, PCODE stubAddr, TraceDestination * pTrace);
#define LOG_TRACE_DESTINATION(_tracedestination, stubAddr, _stHint) LogTraceDestination(_stHint, stubAddr, _tracedestination)
#else
#define LOG_TRACE_DESTINATION(_tracedestination, stubAddr, _stHint)
#endif
typedef VPTR(class StubManager) PTR_StubManager;
class StubManager
{
#ifndef CROSSGEN_COMPILE
friend class StubManagerIterator;
VPTR_BASE_VTABLE_CLASS(StubManager)
public:
// Startup and shutdown the global stubmanager service.
static void InitializeStubManagers();
static void TerminateStubManagers();
// Does any sub manager recognise this EIP?
static BOOL IsStub(PCODE stubAddress)
{
WRAPPER_NO_CONTRACT;
return FindStubManager(stubAddress) != NULL;
}
// Find stub manager for given code address
static PTR_StubManager FindStubManager(PCODE stubAddress);
// Look for stubAddress, if found return TRUE, and set 'trace' to
static BOOL TraceStub(PCODE stubAddress, TraceDestination *trace);
// if 'trace' indicates TRACE_STUB, keep calling TraceStub on 'trace', until you get out of all stubs
// returns true if successfull
static BOOL FollowTrace(TraceDestination *trace);
#ifdef DACCESS_COMPILE
static void EnumMemoryRegions(CLRDataEnumMemoryFlags flags);
#endif
static void AddStubManager(StubManager *mgr);
// NOTE: Very important when using this. It is not thread safe, except in this very
// limited scenario: the thread must have the runtime suspended.
static void UnlinkStubManager(StubManager *mgr);
#ifndef DACCESS_COMPILE
StubManager();
virtual ~StubManager();
#endif
#ifdef _DEBUG
// Debug helper to help identify stub-managers. Make it pure to force stub managers to implement it.
virtual const char * DbgGetName() = 0;
#endif
// Only Stubmanagers that return 'TRACE_MGR_PUSH' as a trace type need to implement this function
// Fills in 'trace' (the target), and 'pRetAddr' (the method that called the stub) (this is needed
// as a 'fall back' so that the debugger can at least stop when the stub returns.
virtual BOOL TraceManager(Thread *thread, TraceDestination *trace,
T_CONTEXT *pContext, BYTE **pRetAddr)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(!"Default impl of TraceManager should never be called!");
return FALSE;
}
// The worker for IsStub. This calls CheckIsStub_Internal, but wraps it w/
// a try-catch.
BOOL CheckIsStub_Worker(PCODE stubStartAddress);
#ifdef _DEBUG
public:
//-----------------------------------------------------------------------------
// Debugging Stubmanager bugs is very painful. You need to figure out
// how you go to where you got and which stub-manager is at fault.
// To help with this, we track a rolling log so that we can give very
// informative asserts. this log is not thread-safe, but we really only expect
// a single stub-manager usage at a time.
//
// A stub manager for a step-in operation may be used across
// both the helper thread and then the managed thread doing the step-in.
// These threads will coordinate to have exclusive access (helper will only access
// when stopped; and managed thread will only access when running).
//
// It's also possible (but rare) for a single thread to have multiple step-in operations.
// Since that's so rare, no present need to expand our logging to support it.
//-----------------------------------------------------------------------------
static bool IsStubLoggingEnabled();
// Call to reset the log. This is used at the start of a new step-operation.
static void DbgBeginLog(TADDR addrCallInstruction, TADDR addrCallTarget);
static void DbgFinishLog();
// Log arbitrary string. This is a nop if it's outside the Begin/Finish window.
// We could consider making each log entry type-safe (and thus avoid the string operations).
static void DbgWriteLog(const CHAR *format, ...);
// Get the log as a string.
static void DbgGetLog(SString * pStringOut);
protected:
// Implement log as a SString.
static SString * s_pDbgStubManagerLog;
static CrstStatic s_DbgLogCrst;
#endif
protected:
// Each stubmanaged implements this.
// This may throw, AV, etc depending on the implementation. This should not
// be called directly unless you know exactly what you're doing.
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress) = 0;
// The worker for TraceStub
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace) = 0;
#ifdef _DEBUG_IMPL
static BOOL IsSingleOwner(PCODE stubAddress, StubManager * pOwner);
#endif
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
public:
// This is used by DAC to provide more information on who owns a stub.
virtual LPCWSTR GetStubManagerName(PCODE addr) = 0;
#endif
private:
SPTR_DECL(StubManager, g_pFirstManager);
PTR_StubManager m_pNextManager;
static CrstStatic s_StubManagerListCrst;
#endif // !CROSSGEN_COMPILE
};
// -------------------------------------------------------
// This just wraps the RangeList methods in a read or
// write lock depending on the operation.
// -------------------------------------------------------
class LockedRangeList : public RangeList
{
public:
VPTR_VTABLE_CLASS(LockedRangeList, RangeList)
LockedRangeList() : RangeList(), m_RangeListRWLock(COOPERATIVE_OR_PREEMPTIVE, LOCK_TYPE_DEFAULT)
{
LIMITED_METHOD_CONTRACT;
}
~LockedRangeList()
{
LIMITED_METHOD_CONTRACT;
}
protected:
virtual BOOL AddRangeWorker(const BYTE *start, const BYTE *end, void *id)
{
WRAPPER_NO_CONTRACT;
SimpleWriteLockHolder lh(&m_RangeListRWLock);
return RangeList::AddRangeWorker(start,end,id);
}
virtual void RemoveRangesWorker(void *id, const BYTE *start = NULL, const BYTE *end = NULL)
{
WRAPPER_NO_CONTRACT;
SimpleWriteLockHolder lh(&m_RangeListRWLock);
RangeList::RemoveRangesWorker(id,start,end);
}
virtual BOOL IsInRangeWorker(TADDR address, TADDR *pID = NULL)
{
WRAPPER_NO_CONTRACT;
SUPPORTS_DAC;
SimpleReadLockHolder lh(&m_RangeListRWLock);
return RangeList::IsInRangeWorker(address, pID);
}
SimpleRWLock m_RangeListRWLock;
};
#ifndef CROSSGEN_COMPILE
//-----------------------------------------------------------
// Stub manager for the prestub. Although there is just one, it has
// unique behavior so it gets its own stub manager.
//-----------------------------------------------------------
class ThePreStubManager : public StubManager
{
VPTR_VTABLE_CLASS(ThePreStubManager, StubManager)
public:
#ifndef DACCESS_COMPILE
ThePreStubManager() { LIMITED_METHOD_CONTRACT; }
#endif
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "ThePreStubManager"; }
#endif
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifndef DACCESS_COMPILE
static void Init(void);
#endif
#ifdef DACCESS_COMPILE
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("ThePreStub"); }
#endif
};
// -------------------------------------------------------
// Stub manager classes for method desc prestubs & normal
// frame-pushing, StubLinker created stubs
// -------------------------------------------------------
typedef VPTR(class PrecodeStubManager) PTR_PrecodeStubManager;
class PrecodeStubManager : public StubManager
{
VPTR_VTABLE_CLASS(PrecodeStubManager, StubManager)
public:
SPTR_DECL(PrecodeStubManager, g_pManager);
#ifdef _DEBUG
// Debug helper to help identify stub-managers.
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "PrecodeStubManager"; }
#endif
static void Init();
#ifndef DACCESS_COMPILE
PrecodeStubManager() {LIMITED_METHOD_CONTRACT;}
~PrecodeStubManager() {WRAPPER_NO_CONTRACT;}
#endif
public:
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifndef DACCESS_COMPILE
virtual BOOL TraceManager(Thread *thread,
TraceDestination *trace,
CONTEXT *pContext,
BYTE **pRetAddr);
#endif
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("MethodDescPrestub"); }
#endif
};
// Note that this stub was written by a debugger guy, and thus when he refers to 'multicast'
// stub, he really means multi or single cast stub. This was done b/c the same stub
// services both types of stub.
// Note from the debugger guy: the way to understand what this manager does is to
// first grok EmitMulticastInvoke for the platform you're working on (right now, just x86).
// Then return here, and understand that (for x86) the only way we know which method
// we're going to invoke next is by inspecting EDI when we've got the debuggee stopped
// in the stub, and so our trace frame will either (FRAME_PUSH) put a breakpoint
// in the stub, or (if we hit the BP) examine EDI, etc, & figure out where we're going next.
typedef VPTR(class StubLinkStubManager) PTR_StubLinkStubManager;
class StubLinkStubManager : public StubManager
{
VPTR_VTABLE_CLASS(StubLinkStubManager, StubManager)
public:
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "StubLinkStubManager"; }
#endif
SPTR_DECL(StubLinkStubManager, g_pManager);
static void Init();
#ifndef DACCESS_COMPILE
StubLinkStubManager() : StubManager(), m_rangeList() {LIMITED_METHOD_CONTRACT;}
~StubLinkStubManager() {WRAPPER_NO_CONTRACT;}
#endif
protected:
LockedRangeList m_rangeList;
public:
// Get dac-ized pointer to rangelist.
PTR_RangeList GetRangeList()
{
SUPPORTS_DAC;
TADDR addr = PTR_HOST_MEMBER_TADDR(StubLinkStubManager, this, m_rangeList);
return PTR_RangeList(addr);
}
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifndef DACCESS_COMPILE
virtual BOOL TraceManager(Thread *thread,
TraceDestination *trace,
CONTEXT *pContext,
BYTE **pRetAddr);
#endif
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("StubLinkStub"); }
#endif
} ;
// Stub manager for thunks.
typedef VPTR(class ThunkHeapStubManager) PTR_ThunkHeapStubManager;
class ThunkHeapStubManager : public StubManager
{
VPTR_VTABLE_CLASS(ThunkHeapStubManager, StubManager)
public:
SPTR_DECL(ThunkHeapStubManager, g_pManager);
static void Init();
#ifndef DACCESS_COMPILE
ThunkHeapStubManager() : StubManager(), m_rangeList() { LIMITED_METHOD_CONTRACT; }
~ThunkHeapStubManager() {WRAPPER_NO_CONTRACT;}
#endif
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "ThunkHeapStubManager"; }
#endif
protected:
LockedRangeList m_rangeList;
public:
// Get dac-ized pointer to rangelist.
PTR_RangeList GetRangeList()
{
SUPPORTS_DAC;
TADDR addr = PTR_HOST_MEMBER_TADDR(ThunkHeapStubManager, this, m_rangeList);
return PTR_RangeList(addr);
}
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
private:
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("ThunkHeapStub"); }
#endif
};
//
// Stub manager for jump stubs created by ExecutionManager::jumpStub()
// These are currently used only on the 64-bit targets IA64 and AMD64
//
typedef VPTR(class JumpStubStubManager) PTR_JumpStubStubManager;
class JumpStubStubManager : public StubManager
{
VPTR_VTABLE_CLASS(JumpStubStubManager, StubManager)
public:
SPTR_DECL(JumpStubStubManager, g_pManager);
static void Init();
#ifndef DACCESS_COMPILE
JumpStubStubManager() {LIMITED_METHOD_CONTRACT;}
~JumpStubStubManager() {WRAPPER_NO_CONTRACT;}
#endif
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "JumpStubStubManager"; }
#endif
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("JumpStub"); }
#endif
};
//
// Stub manager for code sections. It forwards the query to the more appropriate
// stub manager, or handles the query itself.
//
typedef VPTR(class RangeSectionStubManager) PTR_RangeSectionStubManager;
class RangeSectionStubManager : public StubManager
{
VPTR_VTABLE_CLASS(RangeSectionStubManager, StubManager)
public:
SPTR_DECL(RangeSectionStubManager, g_pManager);
static void Init();
#ifndef DACCESS_COMPILE
RangeSectionStubManager() {LIMITED_METHOD_CONTRACT;}
~RangeSectionStubManager() {WRAPPER_NO_CONTRACT;}
#endif
static StubCodeBlockKind GetStubKind(PCODE stubStartAddress);
static PCODE GetMethodThunkTarget(PCODE stubStartAddress);
public:
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "RangeSectionStubManager"; }
#endif
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
private:
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifndef DACCESS_COMPILE
virtual BOOL TraceManager(Thread *thread,
TraceDestination *trace,
CONTEXT *pContext,
BYTE **pRetAddr);
#endif
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr);
#endif
};
//
// This is the stub manager for IL stubs.
//
typedef VPTR(class ILStubManager) PTR_ILStubManager;
#ifdef FEATURE_COMINTEROP
struct ComPlusCallInfo;
#endif // FEATURE_COMINTEROP
class ILStubManager : public StubManager
{
VPTR_VTABLE_CLASS(ILStubManager, StubManager)
public:
static void Init();
#ifndef DACCESS_COMPILE
ILStubManager() : StubManager() {WRAPPER_NO_CONTRACT;}
~ILStubManager()
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
CAN_TAKE_LOCK; // StubManager::UnlinkStubManager uses a crst
}
CONTRACTL_END;
}
#endif
public:
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "ILStubManager"; }
#endif
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
private:
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifndef DACCESS_COMPILE
#ifdef FEATURE_COMINTEROP
static PCODE GetCOMTarget(Object *pThis, ComPlusCallInfo *pComPlusCallInfo);
static PCODE GetWinRTFactoryTarget(ComPlusCallMethodDesc *pCMD);
#endif // FEATURE_COMINTEROP
virtual BOOL TraceManager(Thread *thread,
TraceDestination *trace,
CONTEXT *pContext,
BYTE **pRetAddr);
#endif
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("ILStub"); }
#endif
};
// This is used to recognize
// GenericComPlusCallStub()
// VarargPInvokeStub()
// GenericPInvokeCalliHelper()
typedef VPTR(class InteropDispatchStubManager) PTR_InteropDispatchStubManager;
class InteropDispatchStubManager : public StubManager
{
VPTR_VTABLE_CLASS(InteropDispatchStubManager, StubManager)
public:
static void Init();
#ifndef DACCESS_COMPILE
InteropDispatchStubManager() : StubManager() {WRAPPER_NO_CONTRACT;}
~InteropDispatchStubManager() {WRAPPER_NO_CONTRACT;}
#endif
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "InteropDispatchStubManager"; }
#endif
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
private:
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
#ifndef DACCESS_COMPILE
virtual BOOL TraceManager(Thread *thread,
TraceDestination *trace,
CONTEXT *pContext,
BYTE **pRetAddr);
#endif
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("InteropDispatchStub"); }
#endif
};
//
// Since we don't generate delegate invoke stubs at runtime on WIN64, we
// can't use the StubLinkStubManager for these stubs. Instead, we create
// an additional DelegateInvokeStubManager instead.
//
typedef VPTR(class DelegateInvokeStubManager) PTR_DelegateInvokeStubManager;
class DelegateInvokeStubManager : public StubManager
{
VPTR_VTABLE_CLASS(DelegateInvokeStubManager, StubManager)
public:
SPTR_DECL(DelegateInvokeStubManager, g_pManager);
static void Init();
#if !defined(DACCESS_COMPILE)
DelegateInvokeStubManager() : StubManager(), m_rangeList() {LIMITED_METHOD_CONTRACT;}
~DelegateInvokeStubManager() {WRAPPER_NO_CONTRACT;}
#endif // DACCESS_COMPILE
BOOL AddStub(Stub* pStub);
void RemoveStub(Stub* pStub);
#ifdef _DEBUG
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "DelegateInvokeStubManager"; }
#endif
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
#if !defined(DACCESS_COMPILE)
virtual BOOL TraceManager(Thread *thread, TraceDestination *trace, CONTEXT *pContext, BYTE **pRetAddr);
static BOOL TraceDelegateObject(BYTE *orDel, TraceDestination *trace);
#endif // DACCESS_COMPILE
private:
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination *trace);
protected:
LockedRangeList m_rangeList;
public:
// Get dac-ized pointer to rangelist.
PTR_RangeList GetRangeList()
{
SUPPORTS_DAC;
TADDR addr = PTR_HOST_MEMBER_TADDR(DelegateInvokeStubManager, this, m_rangeList);
return PTR_RangeList(addr);
}
#ifdef DACCESS_COMPILE
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr)
{ LIMITED_METHOD_CONTRACT; return W("DelegateInvokeStub"); }
#endif
};
//---------------------------------------------------------------------------------------
//
// This is the stub manager to help the managed debugger step into a tail call.
// It helps the debugger trace through JIT_TailCall().
//
typedef VPTR(class TailCallStubManager) PTR_TailCallStubManager;
class TailCallStubManager : public StubManager
{
VPTR_VTABLE_CLASS(TailCallStubManager, StubManager)
public:
static void Init();
#if !defined(DACCESS_COMPILE)
TailCallStubManager() : StubManager() {WRAPPER_NO_CONTRACT;}
~TailCallStubManager() {WRAPPER_NO_CONTRACT;}
virtual BOOL TraceManager(Thread * pThread, TraceDestination * pTrace, CONTEXT * pContext, BYTE ** ppRetAddr);
static bool IsTailCallStubHelper(PCODE code);
#endif // DACCESS_COMPILE
#if defined(_DEBUG)
virtual const char * DbgGetName() { LIMITED_METHOD_CONTRACT; return "TailCallStubManager"; }
#endif // _DEBUG
virtual BOOL CheckIsStub_Internal(PCODE stubStartAddress);
private:
virtual BOOL DoTraceStub(PCODE stubStartAddress, TraceDestination * pTrace);
#if defined(DACCESS_COMPILE)
virtual void DoEnumMemoryRegions(CLRDataEnumMemoryFlags flags);
protected:
virtual LPCWSTR GetStubManagerName(PCODE addr) {LIMITED_METHOD_CONTRACT; return W("TailCallStub");}
#endif // !DACCESS_COMPILE
};
//
// Helpers for common value locations in stubs to make stub managers more portable
//
class StubManagerHelpers
{
public:
static PCODE GetReturnAddress(T_CONTEXT * pContext)
{
#if defined(_TARGET_X86_)
return *dac_cast<PTR_PCODE>(pContext->Esp);
#elif defined(_TARGET_AMD64_)
return *dac_cast<PTR_PCODE>(pContext->Rsp);
#elif defined(_TARGET_ARM_)
return pContext->Lr;
#elif defined(_TARGET_ARM64_)
return pContext->Lr;
#else
PORTABILITY_ASSERT("StubManagerHelpers::GetReturnAddress");
return NULL;
#endif
}
static PTR_Object GetThisPtr(T_CONTEXT * pContext)
{
#if defined(_TARGET_X86_)
return dac_cast<PTR_Object>(pContext->Ecx);
#elif defined(_TARGET_AMD64_)
#ifdef UNIX_AMD64_ABI
return dac_cast<PTR_Object>(pContext->Rdi);
#else
return dac_cast<PTR_Object>(pContext->Rcx);
#endif
#elif defined(_TARGET_ARM_)
return dac_cast<PTR_Object>(pContext->R0);
#elif defined(_TARGET_ARM64_)
return dac_cast<PTR_Object>(pContext->X0);
#else
PORTABILITY_ASSERT("StubManagerHelpers::GetThisPtr");
return NULL;
#endif
}
static PCODE GetTailCallTarget(T_CONTEXT * pContext)
{
#if defined(_TARGET_X86_)
return pContext->Eax;
#elif defined(_TARGET_AMD64_)
return pContext->Rax;
#elif defined(_TARGET_ARM_)
return pContext->R12;
#else
PORTABILITY_ASSERT("StubManagerHelpers::GetTailCallTarget");
return NULL;
#endif
}
static TADDR GetHiddenArg(T_CONTEXT * pContext)
{
#if defined(_TARGET_X86_)
return pContext->Eax;
#elif defined(_TARGET_AMD64_)
return pContext->R10;
#elif defined(_TARGET_ARM_)
return pContext->R12;
#elif defined(_TARGET_ARM64_)
return pContext->X15;
#else
PORTABILITY_ASSERT("StubManagerHelpers::GetHiddenArg");
return NULL;
#endif
}
#ifndef CROSSGEN_COMPILE
static PCODE GetRetAddrFromMulticastILStubFrame(T_CONTEXT * pContext)
{
/*
Following is the callstack corresponding to context received by ILStubManager::TraceManager.
This function returns the return address (user code address) where control should return after all
delegates in multicast delegate have been executed.
StubHelpers::MulticastDebuggerTraceHelper
IL_STUB_MulticastDelegate_Invoke
UserCode which invokes multicast delegate <---
*/
#if defined(_TARGET_X86_)
return *((PCODE *)pContext->Ebp + 1);
#elif defined(_TARGET_AMD64_)
T_CONTEXT context(*pContext);
Thread::VirtualUnwindCallFrame(&context);
Thread::VirtualUnwindCallFrame(&context);
return pContext->Rip;
#elif defined(_TARGET_ARM_)
return *((PCODE *)pContext->R11 + 1);
#elif defined(_TARGET_ARM64_)
return *((PCODE *)pContext->Fp + 1);
#else
PORTABILITY_ASSERT("StubManagerHelpers::GetRetAddrFromMulticastILStubFrame");
return NULL;
#endif
}
#endif // !CROSSGEN_COMPILE
static TADDR GetSecondArg(T_CONTEXT * pContext)
{
#if defined(_TARGET_X86_)
return pContext->Edx;
#elif defined(_TARGET_AMD64_)
#ifdef UNIX_AMD64_ABI
return pContext->Rsi;
#else
return pContext->Rdx;
#endif
#elif defined(_TARGET_ARM_)
return pContext->R1;
#elif defined(_TARGET_ARM_)
return pContext->X1;
#else
PORTABILITY_ASSERT("StubManagerHelpers::GetSecondArg");
return NULL;
#endif
}
};
#endif // !CROSSGEN_COMPILE
#endif // !__stubmgr_h__
|