1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "interpreter_common.h"
18 
19 #include "field_helper.h"
20 #include "mirror/array-inl.h"
21 
22 namespace art {
23 namespace interpreter {
24 
ThrowNullPointerExceptionFromInterpreter(const ShadowFrame & shadow_frame)25 void ThrowNullPointerExceptionFromInterpreter(const ShadowFrame& shadow_frame) {
26   ThrowNullPointerExceptionFromDexPC(shadow_frame.GetCurrentLocationForThrow());
27 }
28 
29 template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check>
DoFieldGet(Thread * self,ShadowFrame & shadow_frame,const Instruction * inst,uint16_t inst_data)30 bool DoFieldGet(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst,
31                 uint16_t inst_data) {
32   const bool is_static = (find_type == StaticObjectRead) || (find_type == StaticPrimitiveRead);
33   const uint32_t field_idx = is_static ? inst->VRegB_21c() : inst->VRegC_22c();
34   ArtField* f = FindFieldFromCode<find_type, do_access_check>(field_idx, shadow_frame.GetMethod(), self,
35                                                               Primitive::FieldSize(field_type));
36   if (UNLIKELY(f == nullptr)) {
37     CHECK(self->IsExceptionPending());
38     return false;
39   }
40   Object* obj;
41   if (is_static) {
42     obj = f->GetDeclaringClass();
43   } else {
44     obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
45     if (UNLIKELY(obj == nullptr)) {
46       ThrowNullPointerExceptionForFieldAccess(shadow_frame.GetCurrentLocationForThrow(), f, true);
47       return false;
48     }
49   }
50   f->GetDeclaringClass()->AssertInitializedOrInitializingInThread(self);
51   // Report this field access to instrumentation if needed.
52   instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
53   if (UNLIKELY(instrumentation->HasFieldReadListeners())) {
54     Object* this_object = f->IsStatic() ? nullptr : obj;
55     instrumentation->FieldReadEvent(self, this_object, shadow_frame.GetMethod(),
56                                     shadow_frame.GetDexPC(), f);
57   }
58   uint32_t vregA = is_static ? inst->VRegA_21c(inst_data) : inst->VRegA_22c(inst_data);
59   switch (field_type) {
60     case Primitive::kPrimBoolean:
61       shadow_frame.SetVReg(vregA, f->GetBoolean(obj));
62       break;
63     case Primitive::kPrimByte:
64       shadow_frame.SetVReg(vregA, f->GetByte(obj));
65       break;
66     case Primitive::kPrimChar:
67       shadow_frame.SetVReg(vregA, f->GetChar(obj));
68       break;
69     case Primitive::kPrimShort:
70       shadow_frame.SetVReg(vregA, f->GetShort(obj));
71       break;
72     case Primitive::kPrimInt:
73       shadow_frame.SetVReg(vregA, f->GetInt(obj));
74       break;
75     case Primitive::kPrimLong:
76       shadow_frame.SetVRegLong(vregA, f->GetLong(obj));
77       break;
78     case Primitive::kPrimNot:
79       shadow_frame.SetVRegReference(vregA, f->GetObject(obj));
80       break;
81     default:
82       LOG(FATAL) << "Unreachable: " << field_type;
83   }
84   return true;
85 }
86 
87 // Explicitly instantiate all DoFieldGet functions.
88 #define EXPLICIT_DO_FIELD_GET_TEMPLATE_DECL(_find_type, _field_type, _do_check) \
89   template bool DoFieldGet<_find_type, _field_type, _do_check>(Thread* self, \
90                                                                ShadowFrame& shadow_frame, \
91                                                                const Instruction* inst, \
92                                                                uint16_t inst_data)
93 
94 #define EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(_find_type, _field_type)  \
95     EXPLICIT_DO_FIELD_GET_TEMPLATE_DECL(_find_type, _field_type, false);  \
96     EXPLICIT_DO_FIELD_GET_TEMPLATE_DECL(_find_type, _field_type, true);
97 
98 // iget-XXX
99 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstancePrimitiveRead, Primitive::kPrimBoolean);
100 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstancePrimitiveRead, Primitive::kPrimByte);
101 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstancePrimitiveRead, Primitive::kPrimChar);
102 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstancePrimitiveRead, Primitive::kPrimShort);
103 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstancePrimitiveRead, Primitive::kPrimInt);
104 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstancePrimitiveRead, Primitive::kPrimLong);
105 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(InstanceObjectRead, Primitive::kPrimNot);
106 
107 // sget-XXX
108 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticPrimitiveRead, Primitive::kPrimBoolean);
109 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticPrimitiveRead, Primitive::kPrimByte);
110 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticPrimitiveRead, Primitive::kPrimChar);
111 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticPrimitiveRead, Primitive::kPrimShort);
112 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticPrimitiveRead, Primitive::kPrimInt);
113 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticPrimitiveRead, Primitive::kPrimLong);
114 EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL(StaticObjectRead, Primitive::kPrimNot);
115 
116 #undef EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL
117 #undef EXPLICIT_DO_FIELD_GET_TEMPLATE_DECL
118 
119 // Handles iget-quick, iget-wide-quick and iget-object-quick instructions.
120 // Returns true on success, otherwise throws an exception and returns false.
121 template<Primitive::Type field_type>
DoIGetQuick(ShadowFrame & shadow_frame,const Instruction * inst,uint16_t inst_data)122 bool DoIGetQuick(ShadowFrame& shadow_frame, const Instruction* inst, uint16_t inst_data) {
123   Object* obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
124   if (UNLIKELY(obj == nullptr)) {
125     // We lost the reference to the field index so we cannot get a more
126     // precised exception message.
127     ThrowNullPointerExceptionFromDexPC(shadow_frame.GetCurrentLocationForThrow());
128     return false;
129   }
130   MemberOffset field_offset(inst->VRegC_22c());
131   // Report this field access to instrumentation if needed. Since we only have the offset of
132   // the field from the base of the object, we need to look for it first.
133   instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
134   if (UNLIKELY(instrumentation->HasFieldReadListeners())) {
135     ArtField* f = ArtField::FindInstanceFieldWithOffset(obj->GetClass(),
136                                                         field_offset.Uint32Value());
137     DCHECK(f != nullptr);
138     DCHECK(!f->IsStatic());
139     instrumentation->FieldReadEvent(Thread::Current(), obj, shadow_frame.GetMethod(),
140                                     shadow_frame.GetDexPC(), f);
141   }
142   // Note: iget-x-quick instructions are only for non-volatile fields.
143   const uint32_t vregA = inst->VRegA_22c(inst_data);
144   switch (field_type) {
145     case Primitive::kPrimInt:
146       shadow_frame.SetVReg(vregA, static_cast<int32_t>(obj->GetField32(field_offset)));
147       break;
148     case Primitive::kPrimLong:
149       shadow_frame.SetVRegLong(vregA, static_cast<int64_t>(obj->GetField64(field_offset)));
150       break;
151     case Primitive::kPrimNot:
152       shadow_frame.SetVRegReference(vregA, obj->GetFieldObject<mirror::Object>(field_offset));
153       break;
154     default:
155       LOG(FATAL) << "Unreachable: " << field_type;
156   }
157   return true;
158 }
159 
160 // Explicitly instantiate all DoIGetQuick functions.
161 #define EXPLICIT_DO_IGET_QUICK_TEMPLATE_DECL(_field_type) \
162   template bool DoIGetQuick<_field_type>(ShadowFrame& shadow_frame, const Instruction* inst, \
163                                          uint16_t inst_data)
164 
165 EXPLICIT_DO_IGET_QUICK_TEMPLATE_DECL(Primitive::kPrimInt);    // iget-quick.
166 EXPLICIT_DO_IGET_QUICK_TEMPLATE_DECL(Primitive::kPrimLong);   // iget-wide-quick.
167 EXPLICIT_DO_IGET_QUICK_TEMPLATE_DECL(Primitive::kPrimNot);    // iget-object-quick.
168 #undef EXPLICIT_DO_IGET_QUICK_TEMPLATE_DECL
169 
170 template<Primitive::Type field_type>
GetFieldValue(const ShadowFrame & shadow_frame,uint32_t vreg)171 static JValue GetFieldValue(const ShadowFrame& shadow_frame, uint32_t vreg)
172     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
173   JValue field_value;
174   switch (field_type) {
175     case Primitive::kPrimBoolean:
176       field_value.SetZ(static_cast<uint8_t>(shadow_frame.GetVReg(vreg)));
177       break;
178     case Primitive::kPrimByte:
179       field_value.SetB(static_cast<int8_t>(shadow_frame.GetVReg(vreg)));
180       break;
181     case Primitive::kPrimChar:
182       field_value.SetC(static_cast<uint16_t>(shadow_frame.GetVReg(vreg)));
183       break;
184     case Primitive::kPrimShort:
185       field_value.SetS(static_cast<int16_t>(shadow_frame.GetVReg(vreg)));
186       break;
187     case Primitive::kPrimInt:
188       field_value.SetI(shadow_frame.GetVReg(vreg));
189       break;
190     case Primitive::kPrimLong:
191       field_value.SetJ(shadow_frame.GetVRegLong(vreg));
192       break;
193     case Primitive::kPrimNot:
194       field_value.SetL(shadow_frame.GetVRegReference(vreg));
195       break;
196     default:
197       LOG(FATAL) << "Unreachable: " << field_type;
198       break;
199   }
200   return field_value;
201 }
202 
203 template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check,
204          bool transaction_active>
DoFieldPut(Thread * self,const ShadowFrame & shadow_frame,const Instruction * inst,uint16_t inst_data)205 bool DoFieldPut(Thread* self, const ShadowFrame& shadow_frame, const Instruction* inst,
206                 uint16_t inst_data) {
207   bool do_assignability_check = do_access_check;
208   bool is_static = (find_type == StaticObjectWrite) || (find_type == StaticPrimitiveWrite);
209   uint32_t field_idx = is_static ? inst->VRegB_21c() : inst->VRegC_22c();
210   ArtField* f = FindFieldFromCode<find_type, do_access_check>(field_idx, shadow_frame.GetMethod(), self,
211                                                               Primitive::FieldSize(field_type));
212   if (UNLIKELY(f == nullptr)) {
213     CHECK(self->IsExceptionPending());
214     return false;
215   }
216   Object* obj;
217   if (is_static) {
218     obj = f->GetDeclaringClass();
219   } else {
220     obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
221     if (UNLIKELY(obj == nullptr)) {
222       ThrowNullPointerExceptionForFieldAccess(shadow_frame.GetCurrentLocationForThrow(),
223                                               f, false);
224       return false;
225     }
226   }
227   f->GetDeclaringClass()->AssertInitializedOrInitializingInThread(self);
228   uint32_t vregA = is_static ? inst->VRegA_21c(inst_data) : inst->VRegA_22c(inst_data);
229   // Report this field access to instrumentation if needed. Since we only have the offset of
230   // the field from the base of the object, we need to look for it first.
231   instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
232   if (UNLIKELY(instrumentation->HasFieldWriteListeners())) {
233     JValue field_value = GetFieldValue<field_type>(shadow_frame, vregA);
234     Object* this_object = f->IsStatic() ? nullptr : obj;
235     instrumentation->FieldWriteEvent(self, this_object, shadow_frame.GetMethod(),
236                                      shadow_frame.GetDexPC(), f, field_value);
237   }
238   switch (field_type) {
239     case Primitive::kPrimBoolean:
240       f->SetBoolean<transaction_active>(obj, shadow_frame.GetVReg(vregA));
241       break;
242     case Primitive::kPrimByte:
243       f->SetByte<transaction_active>(obj, shadow_frame.GetVReg(vregA));
244       break;
245     case Primitive::kPrimChar:
246       f->SetChar<transaction_active>(obj, shadow_frame.GetVReg(vregA));
247       break;
248     case Primitive::kPrimShort:
249       f->SetShort<transaction_active>(obj, shadow_frame.GetVReg(vregA));
250       break;
251     case Primitive::kPrimInt:
252       f->SetInt<transaction_active>(obj, shadow_frame.GetVReg(vregA));
253       break;
254     case Primitive::kPrimLong:
255       f->SetLong<transaction_active>(obj, shadow_frame.GetVRegLong(vregA));
256       break;
257     case Primitive::kPrimNot: {
258       Object* reg = shadow_frame.GetVRegReference(vregA);
259       if (do_assignability_check && reg != nullptr) {
260         // FieldHelper::GetType can resolve classes, use a handle wrapper which will restore the
261         // object in the destructor.
262         Class* field_class;
263         {
264           StackHandleScope<3> hs(self);
265           HandleWrapper<mirror::ArtField> h_f(hs.NewHandleWrapper(&f));
266           HandleWrapper<mirror::Object> h_reg(hs.NewHandleWrapper(&reg));
267           HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper(&obj));
268           FieldHelper fh(h_f);
269           field_class = fh.GetType();
270         }
271         if (!reg->VerifierInstanceOf(field_class)) {
272           // This should never happen.
273           std::string temp1, temp2, temp3;
274           self->ThrowNewExceptionF(self->GetCurrentLocationForThrow(),
275                                    "Ljava/lang/VirtualMachineError;",
276                                    "Put '%s' that is not instance of field '%s' in '%s'",
277                                    reg->GetClass()->GetDescriptor(&temp1),
278                                    field_class->GetDescriptor(&temp2),
279                                    f->GetDeclaringClass()->GetDescriptor(&temp3));
280           return false;
281         }
282       }
283       f->SetObj<transaction_active>(obj, reg);
284       break;
285     }
286     default:
287       LOG(FATAL) << "Unreachable: " << field_type;
288   }
289   return true;
290 }
291 
292 // Explicitly instantiate all DoFieldPut functions.
293 #define EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL(_find_type, _field_type, _do_check, _transaction_active) \
294   template bool DoFieldPut<_find_type, _field_type, _do_check, _transaction_active>(Thread* self, \
295       const ShadowFrame& shadow_frame, const Instruction* inst, uint16_t inst_data)
296 
297 #define EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(_find_type, _field_type)  \
298     EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL(_find_type, _field_type, false, false);  \
299     EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL(_find_type, _field_type, true, false);  \
300     EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL(_find_type, _field_type, false, true);  \
301     EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL(_find_type, _field_type, true, true);
302 
303 // iput-XXX
304 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstancePrimitiveWrite, Primitive::kPrimBoolean);
305 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstancePrimitiveWrite, Primitive::kPrimByte);
306 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstancePrimitiveWrite, Primitive::kPrimChar);
307 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstancePrimitiveWrite, Primitive::kPrimShort);
308 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstancePrimitiveWrite, Primitive::kPrimInt);
309 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstancePrimitiveWrite, Primitive::kPrimLong);
310 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(InstanceObjectWrite, Primitive::kPrimNot);
311 
312 // sput-XXX
313 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticPrimitiveWrite, Primitive::kPrimBoolean);
314 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticPrimitiveWrite, Primitive::kPrimByte);
315 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticPrimitiveWrite, Primitive::kPrimChar);
316 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticPrimitiveWrite, Primitive::kPrimShort);
317 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticPrimitiveWrite, Primitive::kPrimInt);
318 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticPrimitiveWrite, Primitive::kPrimLong);
319 EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL(StaticObjectWrite, Primitive::kPrimNot);
320 
321 #undef EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL
322 #undef EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL
323 
324 template<Primitive::Type field_type, bool transaction_active>
DoIPutQuick(const ShadowFrame & shadow_frame,const Instruction * inst,uint16_t inst_data)325 bool DoIPutQuick(const ShadowFrame& shadow_frame, const Instruction* inst, uint16_t inst_data) {
326   Object* obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
327   if (UNLIKELY(obj == nullptr)) {
328     // We lost the reference to the field index so we cannot get a more
329     // precised exception message.
330     ThrowNullPointerExceptionFromDexPC(shadow_frame.GetCurrentLocationForThrow());
331     return false;
332   }
333   MemberOffset field_offset(inst->VRegC_22c());
334   const uint32_t vregA = inst->VRegA_22c(inst_data);
335   // Report this field modification to instrumentation if needed. Since we only have the offset of
336   // the field from the base of the object, we need to look for it first.
337   instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
338   if (UNLIKELY(instrumentation->HasFieldWriteListeners())) {
339     ArtField* f = ArtField::FindInstanceFieldWithOffset(obj->GetClass(),
340                                                         field_offset.Uint32Value());
341     DCHECK(f != nullptr);
342     DCHECK(!f->IsStatic());
343     JValue field_value = GetFieldValue<field_type>(shadow_frame, vregA);
344     instrumentation->FieldWriteEvent(Thread::Current(), obj, shadow_frame.GetMethod(),
345                                      shadow_frame.GetDexPC(), f, field_value);
346   }
347   // Note: iput-x-quick instructions are only for non-volatile fields.
348   switch (field_type) {
349     case Primitive::kPrimInt:
350       obj->SetField32<transaction_active>(field_offset, shadow_frame.GetVReg(vregA));
351       break;
352     case Primitive::kPrimLong:
353       obj->SetField64<transaction_active>(field_offset, shadow_frame.GetVRegLong(vregA));
354       break;
355     case Primitive::kPrimNot:
356       obj->SetFieldObject<transaction_active>(field_offset, shadow_frame.GetVRegReference(vregA));
357       break;
358     default:
359       LOG(FATAL) << "Unreachable: " << field_type;
360   }
361   return true;
362 }
363 
364 // Explicitly instantiate all DoIPutQuick functions.
365 #define EXPLICIT_DO_IPUT_QUICK_TEMPLATE_DECL(_field_type, _transaction_active) \
366   template bool DoIPutQuick<_field_type, _transaction_active>(const ShadowFrame& shadow_frame, \
367                                                               const Instruction* inst, \
368                                                               uint16_t inst_data)
369 
370 #define EXPLICIT_DO_IPUT_QUICK_ALL_TEMPLATE_DECL(_field_type)   \
371   EXPLICIT_DO_IPUT_QUICK_TEMPLATE_DECL(_field_type, false);     \
372   EXPLICIT_DO_IPUT_QUICK_TEMPLATE_DECL(_field_type, true);
373 
374 EXPLICIT_DO_IPUT_QUICK_ALL_TEMPLATE_DECL(Primitive::kPrimInt);    // iget-quick.
375 EXPLICIT_DO_IPUT_QUICK_ALL_TEMPLATE_DECL(Primitive::kPrimLong);   // iget-wide-quick.
376 EXPLICIT_DO_IPUT_QUICK_ALL_TEMPLATE_DECL(Primitive::kPrimNot);    // iget-object-quick.
377 #undef EXPLICIT_DO_IPUT_QUICK_ALL_TEMPLATE_DECL
378 #undef EXPLICIT_DO_IPUT_QUICK_TEMPLATE_DECL
379 
380 /**
381  * Finds the location where this exception will be caught. We search until we reach either the top
382  * frame or a native frame, in which cases this exception is considered uncaught.
383  */
384 class CatchLocationFinder : public StackVisitor {
385  public:
CatchLocationFinder(Thread * self,Handle<mirror::Throwable> * exception)386   explicit CatchLocationFinder(Thread* self, Handle<mirror::Throwable>* exception)
387       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
388     : StackVisitor(self, nullptr), self_(self), handle_scope_(self), exception_(exception),
389       catch_method_(handle_scope_.NewHandle<mirror::ArtMethod>(nullptr)),
390       catch_dex_pc_(DexFile::kDexNoIndex), clear_exception_(false) {
391   }
392 
VisitFrame()393   bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
394     mirror::ArtMethod* method = GetMethod();
395     if (method == nullptr) {
396       return true;
397     }
398     if (method->IsRuntimeMethod()) {
399       // Ignore callee save method.
400       DCHECK(method->IsCalleeSaveMethod());
401       return true;
402     }
403     if (method->IsNative()) {
404       return false;  // End stack walk.
405     }
406     DCHECK(!method->IsNative());
407     uint32_t dex_pc = GetDexPc();
408     if (dex_pc != DexFile::kDexNoIndex) {
409       uint32_t found_dex_pc;
410       {
411         StackHandleScope<3> hs(self_);
412         Handle<mirror::Class> exception_class(hs.NewHandle((*exception_)->GetClass()));
413         Handle<mirror::ArtMethod> h_method(hs.NewHandle(method));
414         found_dex_pc = mirror::ArtMethod::FindCatchBlock(h_method, exception_class, dex_pc,
415                                                          &clear_exception_);
416       }
417       if (found_dex_pc != DexFile::kDexNoIndex) {
418         catch_method_.Assign(method);
419         catch_dex_pc_ = found_dex_pc;
420         return false;  // End stack walk.
421       }
422     }
423     return true;  // Continue stack walk.
424   }
425 
GetCatchMethod()426   ArtMethod* GetCatchMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
427     return catch_method_.Get();
428   }
429 
GetCatchDexPc()430   uint32_t GetCatchDexPc() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
431     return catch_dex_pc_;
432   }
433 
NeedClearException()434   bool NeedClearException() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
435     return clear_exception_;
436   }
437 
438  private:
439   Thread* const self_;
440   StackHandleScope<1> handle_scope_;
441   Handle<mirror::Throwable>* exception_;
442   Handle<mirror::ArtMethod> catch_method_;
443   uint32_t catch_dex_pc_;
444   bool clear_exception_;
445 
446 
447   DISALLOW_COPY_AND_ASSIGN(CatchLocationFinder);
448 };
449 
FindNextInstructionFollowingException(Thread * self,ShadowFrame & shadow_frame,uint32_t dex_pc,const instrumentation::Instrumentation * instrumentation)450 uint32_t FindNextInstructionFollowingException(Thread* self,
451                                                ShadowFrame& shadow_frame,
452                                                uint32_t dex_pc,
453                                                const instrumentation::Instrumentation* instrumentation) {
454   self->VerifyStack();
455   ThrowLocation throw_location;
456   StackHandleScope<3> hs(self);
457   Handle<mirror::Throwable> exception(hs.NewHandle(self->GetException(&throw_location)));
458   if (!self->IsExceptionReportedToInstrumentation() && instrumentation->HasExceptionCaughtListeners()) {
459     CatchLocationFinder clf(self, &exception);
460     clf.WalkStack(false);
461     instrumentation->ExceptionCaughtEvent(self, throw_location, clf.GetCatchMethod(),
462                                           clf.GetCatchDexPc(), exception.Get());
463     self->SetExceptionReportedToInstrumentation(true);
464   }
465   bool clear_exception = false;
466   uint32_t found_dex_pc;
467   {
468     Handle<mirror::Class> exception_class(hs.NewHandle(exception->GetClass()));
469     Handle<mirror::ArtMethod> h_method(hs.NewHandle(shadow_frame.GetMethod()));
470     found_dex_pc = mirror::ArtMethod::FindCatchBlock(h_method, exception_class, dex_pc,
471                                                      &clear_exception);
472   }
473   if (found_dex_pc == DexFile::kDexNoIndex) {
474     instrumentation->MethodUnwindEvent(self, shadow_frame.GetThisObject(),
475                                        shadow_frame.GetMethod(), dex_pc);
476   } else {
477     if (self->IsExceptionReportedToInstrumentation()) {
478       instrumentation->MethodUnwindEvent(self, shadow_frame.GetThisObject(),
479                                          shadow_frame.GetMethod(), dex_pc);
480     }
481     if (clear_exception) {
482       self->ClearException();
483     }
484   }
485   return found_dex_pc;
486 }
487 
UnexpectedOpcode(const Instruction * inst,MethodHelper & mh)488 void UnexpectedOpcode(const Instruction* inst, MethodHelper& mh) {
489   LOG(FATAL) << "Unexpected instruction: " << inst->DumpString(mh.GetMethod()->GetDexFile());
490   exit(0);  // Unreachable, keep GCC happy.
491 }
492 
493 static void UnstartedRuntimeInvoke(Thread* self, MethodHelper& mh,
494                                    const DexFile::CodeItem* code_item, ShadowFrame* shadow_frame,
495                                    JValue* result, size_t arg_offset)
496     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
497 
498 // Assign register 'src_reg' from shadow_frame to register 'dest_reg' into new_shadow_frame.
AssignRegister(ShadowFrame * new_shadow_frame,const ShadowFrame & shadow_frame,size_t dest_reg,size_t src_reg)499 static inline void AssignRegister(ShadowFrame* new_shadow_frame, const ShadowFrame& shadow_frame,
500                                   size_t dest_reg, size_t src_reg)
501     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
502   // If both register locations contains the same value, the register probably holds a reference.
503   // Uint required, so that sign extension does not make this wrong on 64b systems
504   uint32_t src_value = shadow_frame.GetVReg(src_reg);
505   mirror::Object* o = shadow_frame.GetVRegReference<kVerifyNone>(src_reg);
506   if (src_value == reinterpret_cast<uintptr_t>(o)) {
507     new_shadow_frame->SetVRegReference(dest_reg, o);
508   } else {
509     new_shadow_frame->SetVReg(dest_reg, src_value);
510   }
511 }
512 
AbortTransaction(Thread * self,const char * fmt,...)513 void AbortTransaction(Thread* self, const char* fmt, ...) {
514   CHECK(Runtime::Current()->IsActiveTransaction());
515   // Throw an exception so we can abort the transaction and undo every change.
516   va_list args;
517   va_start(args, fmt);
518   self->ThrowNewExceptionV(self->GetCurrentLocationForThrow(), "Ljava/lang/InternalError;", fmt,
519                            args);
520   va_end(args);
521 }
522 
523 template<bool is_range, bool do_assignability_check>
DoCall(ArtMethod * method,Thread * self,ShadowFrame & shadow_frame,const Instruction * inst,uint16_t inst_data,JValue * result)524 bool DoCall(ArtMethod* method, Thread* self, ShadowFrame& shadow_frame,
525             const Instruction* inst, uint16_t inst_data, JValue* result) {
526   // Compute method information.
527   const DexFile::CodeItem* code_item = method->GetCodeItem();
528   const uint16_t num_ins = (is_range) ? inst->VRegA_3rc(inst_data) : inst->VRegA_35c(inst_data);
529   uint16_t num_regs;
530   if (LIKELY(code_item != NULL)) {
531     num_regs = code_item->registers_size_;
532     DCHECK_EQ(num_ins, code_item->ins_size_);
533   } else {
534     DCHECK(method->IsNative() || method->IsProxyMethod());
535     num_regs = num_ins;
536   }
537 
538   // Allocate shadow frame on the stack.
539   const char* old_cause = self->StartAssertNoThreadSuspension("DoCall");
540   void* memory = alloca(ShadowFrame::ComputeSize(num_regs));
541   ShadowFrame* new_shadow_frame(ShadowFrame::Create(num_regs, &shadow_frame, method, 0, memory));
542 
543   // Initialize new shadow frame.
544   const size_t first_dest_reg = num_regs - num_ins;
545   StackHandleScope<1> hs(self);
546   MethodHelper mh(hs.NewHandle(method));
547   if (do_assignability_check) {
548     // Slow path.
549     // We might need to do class loading, which incurs a thread state change to kNative. So
550     // register the shadow frame as under construction and allow suspension again.
551     self->SetShadowFrameUnderConstruction(new_shadow_frame);
552     self->EndAssertNoThreadSuspension(old_cause);
553 
554     // We need to do runtime check on reference assignment. We need to load the shorty
555     // to get the exact type of each reference argument.
556     const DexFile::TypeList* params = method->GetParameterTypeList();
557     uint32_t shorty_len = 0;
558     const char* shorty = method->GetShorty(&shorty_len);
559 
560     // TODO: find a cleaner way to separate non-range and range information without duplicating code.
561     uint32_t arg[5];  // only used in invoke-XXX.
562     uint32_t vregC;   // only used in invoke-XXX-range.
563     if (is_range) {
564       vregC = inst->VRegC_3rc();
565     } else {
566       inst->GetVarArgs(arg, inst_data);
567     }
568 
569     // Handle receiver apart since it's not part of the shorty.
570     size_t dest_reg = first_dest_reg;
571     size_t arg_offset = 0;
572     if (!method->IsStatic()) {
573       size_t receiver_reg = is_range ? vregC : arg[0];
574       new_shadow_frame->SetVRegReference(dest_reg, shadow_frame.GetVRegReference(receiver_reg));
575       ++dest_reg;
576       ++arg_offset;
577     }
578     for (uint32_t shorty_pos = 0; dest_reg < num_regs; ++shorty_pos, ++dest_reg, ++arg_offset) {
579       DCHECK_LT(shorty_pos + 1, shorty_len);
580       const size_t src_reg = (is_range) ? vregC + arg_offset : arg[arg_offset];
581       switch (shorty[shorty_pos + 1]) {
582         case 'L': {
583           Object* o = shadow_frame.GetVRegReference(src_reg);
584           if (do_assignability_check && o != NULL) {
585             Class* arg_type = mh.GetClassFromTypeIdx(params->GetTypeItem(shorty_pos).type_idx_);
586             if (arg_type == NULL) {
587               CHECK(self->IsExceptionPending());
588               return false;
589             }
590             if (!o->VerifierInstanceOf(arg_type)) {
591               // This should never happen.
592               std::string temp1, temp2;
593               self->ThrowNewExceptionF(self->GetCurrentLocationForThrow(),
594                                        "Ljava/lang/VirtualMachineError;",
595                                        "Invoking %s with bad arg %d, type '%s' not instance of '%s'",
596                                        method->GetName(), shorty_pos,
597                                        o->GetClass()->GetDescriptor(&temp1),
598                                        arg_type->GetDescriptor(&temp2));
599               return false;
600             }
601           }
602           new_shadow_frame->SetVRegReference(dest_reg, o);
603           break;
604         }
605         case 'J': case 'D': {
606           uint64_t wide_value = (static_cast<uint64_t>(shadow_frame.GetVReg(src_reg + 1)) << 32) |
607                                 static_cast<uint32_t>(shadow_frame.GetVReg(src_reg));
608           new_shadow_frame->SetVRegLong(dest_reg, wide_value);
609           ++dest_reg;
610           ++arg_offset;
611           break;
612         }
613         default:
614           new_shadow_frame->SetVReg(dest_reg, shadow_frame.GetVReg(src_reg));
615           break;
616       }
617     }
618     // We're done with the construction.
619     self->ClearShadowFrameUnderConstruction();
620   } else {
621     // Fast path: no extra checks.
622     if (is_range) {
623       const uint16_t first_src_reg = inst->VRegC_3rc();
624       for (size_t src_reg = first_src_reg, dest_reg = first_dest_reg; dest_reg < num_regs;
625           ++dest_reg, ++src_reg) {
626         AssignRegister(new_shadow_frame, shadow_frame, dest_reg, src_reg);
627       }
628     } else {
629       DCHECK_LE(num_ins, 5U);
630       uint16_t regList = inst->Fetch16(2);
631       uint16_t count = num_ins;
632       if (count == 5) {
633         AssignRegister(new_shadow_frame, shadow_frame, first_dest_reg + 4U, (inst_data >> 8) & 0x0f);
634         --count;
635        }
636       for (size_t arg_index = 0; arg_index < count; ++arg_index, regList >>= 4) {
637         AssignRegister(new_shadow_frame, shadow_frame, first_dest_reg + arg_index, regList & 0x0f);
638       }
639     }
640     self->EndAssertNoThreadSuspension(old_cause);
641   }
642 
643   // Do the call now.
644   if (LIKELY(Runtime::Current()->IsStarted())) {
645     if (kIsDebugBuild && method->GetEntryPointFromInterpreter() == nullptr) {
646       LOG(FATAL) << "Attempt to invoke non-executable method: " << PrettyMethod(method);
647     }
648     if (kIsDebugBuild && Runtime::Current()->GetInstrumentation()->IsForcedInterpretOnly() &&
649         !method->IsNative() && !method->IsProxyMethod() &&
650         method->GetEntryPointFromInterpreter() == artInterpreterToCompiledCodeBridge) {
651       LOG(FATAL) << "Attempt to call compiled code when -Xint: " << PrettyMethod(method);
652     }
653     (method->GetEntryPointFromInterpreter())(self, mh, code_item, new_shadow_frame, result);
654   } else {
655     UnstartedRuntimeInvoke(self, mh, code_item, new_shadow_frame, result, first_dest_reg);
656   }
657   return !self->IsExceptionPending();
658 }
659 
660 template <bool is_range, bool do_access_check, bool transaction_active>
DoFilledNewArray(const Instruction * inst,const ShadowFrame & shadow_frame,Thread * self,JValue * result)661 bool DoFilledNewArray(const Instruction* inst, const ShadowFrame& shadow_frame,
662                       Thread* self, JValue* result) {
663   DCHECK(inst->Opcode() == Instruction::FILLED_NEW_ARRAY ||
664          inst->Opcode() == Instruction::FILLED_NEW_ARRAY_RANGE);
665   const int32_t length = is_range ? inst->VRegA_3rc() : inst->VRegA_35c();
666   if (!is_range) {
667     // Checks FILLED_NEW_ARRAY's length does not exceed 5 arguments.
668     CHECK_LE(length, 5);
669   }
670   if (UNLIKELY(length < 0)) {
671     ThrowNegativeArraySizeException(length);
672     return false;
673   }
674   uint16_t type_idx = is_range ? inst->VRegB_3rc() : inst->VRegB_35c();
675   Class* arrayClass = ResolveVerifyAndClinit(type_idx, shadow_frame.GetMethod(),
676                                              self, false, do_access_check);
677   if (UNLIKELY(arrayClass == NULL)) {
678     DCHECK(self->IsExceptionPending());
679     return false;
680   }
681   CHECK(arrayClass->IsArrayClass());
682   Class* componentClass = arrayClass->GetComponentType();
683   if (UNLIKELY(componentClass->IsPrimitive() && !componentClass->IsPrimitiveInt())) {
684     if (componentClass->IsPrimitiveLong() || componentClass->IsPrimitiveDouble()) {
685       ThrowRuntimeException("Bad filled array request for type %s",
686                             PrettyDescriptor(componentClass).c_str());
687     } else {
688       self->ThrowNewExceptionF(shadow_frame.GetCurrentLocationForThrow(),
689                                "Ljava/lang/InternalError;",
690                                "Found type %s; filled-new-array not implemented for anything but 'int'",
691                                PrettyDescriptor(componentClass).c_str());
692     }
693     return false;
694   }
695   Object* newArray = Array::Alloc<true>(self, arrayClass, length, arrayClass->GetComponentSize(),
696                                         Runtime::Current()->GetHeap()->GetCurrentAllocator());
697   if (UNLIKELY(newArray == NULL)) {
698     DCHECK(self->IsExceptionPending());
699     return false;
700   }
701   uint32_t arg[5];  // only used in filled-new-array.
702   uint32_t vregC;   // only used in filled-new-array-range.
703   if (is_range) {
704     vregC = inst->VRegC_3rc();
705   } else {
706     inst->GetVarArgs(arg);
707   }
708   const bool is_primitive_int_component = componentClass->IsPrimitiveInt();
709   for (int32_t i = 0; i < length; ++i) {
710     size_t src_reg = is_range ? vregC + i : arg[i];
711     if (is_primitive_int_component) {
712       newArray->AsIntArray()->SetWithoutChecks<transaction_active>(i, shadow_frame.GetVReg(src_reg));
713     } else {
714       newArray->AsObjectArray<Object>()->SetWithoutChecks<transaction_active>(i, shadow_frame.GetVRegReference(src_reg));
715     }
716   }
717 
718   result->SetL(newArray);
719   return true;
720 }
721 
722 // TODO fix thread analysis: should be SHARED_LOCKS_REQUIRED(Locks::mutator_lock_).
723 template<typename T>
RecordArrayElementsInTransactionImpl(mirror::PrimitiveArray<T> * array,int32_t count)724 static void RecordArrayElementsInTransactionImpl(mirror::PrimitiveArray<T>* array, int32_t count)
725     NO_THREAD_SAFETY_ANALYSIS {
726   Runtime* runtime = Runtime::Current();
727   for (int32_t i = 0; i < count; ++i) {
728     runtime->RecordWriteArray(array, i, array->GetWithoutChecks(i));
729   }
730 }
731 
RecordArrayElementsInTransaction(mirror::Array * array,int32_t count)732 void RecordArrayElementsInTransaction(mirror::Array* array, int32_t count)
733     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
734   DCHECK(Runtime::Current()->IsActiveTransaction());
735   DCHECK(array != nullptr);
736   DCHECK_LE(count, array->GetLength());
737   Primitive::Type primitive_component_type = array->GetClass()->GetComponentType()->GetPrimitiveType();
738   switch (primitive_component_type) {
739     case Primitive::kPrimBoolean:
740       RecordArrayElementsInTransactionImpl(array->AsBooleanArray(), count);
741       break;
742     case Primitive::kPrimByte:
743       RecordArrayElementsInTransactionImpl(array->AsByteArray(), count);
744       break;
745     case Primitive::kPrimChar:
746       RecordArrayElementsInTransactionImpl(array->AsCharArray(), count);
747       break;
748     case Primitive::kPrimShort:
749       RecordArrayElementsInTransactionImpl(array->AsShortArray(), count);
750       break;
751     case Primitive::kPrimInt:
752     case Primitive::kPrimFloat:
753       RecordArrayElementsInTransactionImpl(array->AsIntArray(), count);
754       break;
755     case Primitive::kPrimLong:
756     case Primitive::kPrimDouble:
757       RecordArrayElementsInTransactionImpl(array->AsLongArray(), count);
758       break;
759     default:
760       LOG(FATAL) << "Unsupported primitive type " << primitive_component_type
761                  << " in fill-array-data";
762       break;
763   }
764 }
765 
766 // Helper function to deal with class loading in an unstarted runtime.
UnstartedRuntimeFindClass(Thread * self,Handle<mirror::String> className,Handle<mirror::ClassLoader> class_loader,JValue * result,const std::string & method_name,bool initialize_class,bool abort_if_not_found)767 static void UnstartedRuntimeFindClass(Thread* self, Handle<mirror::String> className,
768                                       Handle<mirror::ClassLoader> class_loader, JValue* result,
769                                       const std::string& method_name, bool initialize_class,
770                                       bool abort_if_not_found)
771     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
772   CHECK(className.Get() != nullptr);
773   std::string descriptor(DotToDescriptor(className->ToModifiedUtf8().c_str()));
774   ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
775 
776   Class* found = class_linker->FindClass(self, descriptor.c_str(), class_loader);
777   if (found == nullptr && abort_if_not_found) {
778     if (!self->IsExceptionPending()) {
779       AbortTransaction(self, "%s failed in un-started runtime for class: %s",
780                        method_name.c_str(), PrettyDescriptor(descriptor.c_str()).c_str());
781     }
782     return;
783   }
784   if (found != nullptr && initialize_class) {
785     StackHandleScope<1> hs(self);
786     Handle<mirror::Class> h_class(hs.NewHandle(found));
787     if (!class_linker->EnsureInitialized(h_class, true, true)) {
788       CHECK(self->IsExceptionPending());
789       return;
790     }
791   }
792   result->SetL(found);
793 }
794 
UnstartedRuntimeInvoke(Thread * self,MethodHelper & mh,const DexFile::CodeItem * code_item,ShadowFrame * shadow_frame,JValue * result,size_t arg_offset)795 static void UnstartedRuntimeInvoke(Thread* self, MethodHelper& mh,
796                                    const DexFile::CodeItem* code_item, ShadowFrame* shadow_frame,
797                                    JValue* result, size_t arg_offset) {
798   // In a runtime that's not started we intercept certain methods to avoid complicated dependency
799   // problems in core libraries.
800   std::string name(PrettyMethod(shadow_frame->GetMethod()));
801   if (name == "java.lang.Class java.lang.Class.forName(java.lang.String)") {
802     // TODO: Support for the other variants that take more arguments should also be added.
803     mirror::String* class_name = shadow_frame->GetVRegReference(arg_offset)->AsString();
804     StackHandleScope<1> hs(self);
805     Handle<mirror::String> h_class_name(hs.NewHandle(class_name));
806     UnstartedRuntimeFindClass(self, h_class_name, NullHandle<mirror::ClassLoader>(), result, name,
807                               true, true);
808   } else if (name == "java.lang.Class java.lang.VMClassLoader.loadClass(java.lang.String, boolean)") {
809     mirror::String* class_name = shadow_frame->GetVRegReference(arg_offset)->AsString();
810     StackHandleScope<1> hs(self);
811     Handle<mirror::String> h_class_name(hs.NewHandle(class_name));
812     UnstartedRuntimeFindClass(self, h_class_name, NullHandle<mirror::ClassLoader>(), result, name,
813                               false, true);
814   } else if (name == "java.lang.Class java.lang.VMClassLoader.findLoadedClass(java.lang.ClassLoader, java.lang.String)") {
815     mirror::String* class_name = shadow_frame->GetVRegReference(arg_offset + 1)->AsString();
816     mirror::ClassLoader* class_loader =
817         down_cast<mirror::ClassLoader*>(shadow_frame->GetVRegReference(arg_offset));
818     StackHandleScope<2> hs(self);
819     Handle<mirror::String> h_class_name(hs.NewHandle(class_name));
820     Handle<mirror::ClassLoader> h_class_loader(hs.NewHandle(class_loader));
821     UnstartedRuntimeFindClass(self, h_class_name, h_class_loader, result, name, false, false);
822   } else if (name == "java.lang.Class java.lang.Void.lookupType()") {
823     result->SetL(Runtime::Current()->GetClassLinker()->FindPrimitiveClass('V'));
824   } else if (name == "java.lang.Object java.lang.Class.newInstance()") {
825     Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass();
826     ArtMethod* c = klass->FindDeclaredDirectMethod("<init>", "()V");
827     CHECK(c != NULL);
828     StackHandleScope<1> hs(self);
829     Handle<Object> obj(hs.NewHandle(klass->AllocObject(self)));
830     CHECK(obj.Get() != NULL);
831     EnterInterpreterFromInvoke(self, c, obj.Get(), NULL, NULL);
832     result->SetL(obj.Get());
833   } else if (name == "java.lang.reflect.Field java.lang.Class.getDeclaredField(java.lang.String)") {
834     // Special managed code cut-out to allow field lookup in a un-started runtime that'd fail
835     // going the reflective Dex way.
836     Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass();
837     String* name = shadow_frame->GetVRegReference(arg_offset + 1)->AsString();
838     ArtField* found = NULL;
839     ObjectArray<ArtField>* fields = klass->GetIFields();
840     for (int32_t i = 0; i < fields->GetLength() && found == NULL; ++i) {
841       ArtField* f = fields->Get(i);
842       if (name->Equals(f->GetName())) {
843         found = f;
844       }
845     }
846     if (found == NULL) {
847       fields = klass->GetSFields();
848       for (int32_t i = 0; i < fields->GetLength() && found == NULL; ++i) {
849         ArtField* f = fields->Get(i);
850         if (name->Equals(f->GetName())) {
851           found = f;
852         }
853       }
854     }
855     CHECK(found != NULL)
856       << "Failed to find field in Class.getDeclaredField in un-started runtime. name="
857       << name->ToModifiedUtf8() << " class=" << PrettyDescriptor(klass);
858     // TODO: getDeclaredField calls GetType once the field is found to ensure a
859     //       NoClassDefFoundError is thrown if the field's type cannot be resolved.
860     Class* jlr_Field = self->DecodeJObject(WellKnownClasses::java_lang_reflect_Field)->AsClass();
861     StackHandleScope<1> hs(self);
862     Handle<Object> field(hs.NewHandle(jlr_Field->AllocNonMovableObject(self)));
863     CHECK(field.Get() != NULL);
864     ArtMethod* c = jlr_Field->FindDeclaredDirectMethod("<init>", "(Ljava/lang/reflect/ArtField;)V");
865     uint32_t args[1];
866     args[0] = StackReference<mirror::Object>::FromMirrorPtr(found).AsVRegValue();
867     EnterInterpreterFromInvoke(self, c, field.Get(), args, NULL);
868     result->SetL(field.Get());
869   } else if (name == "int java.lang.Object.hashCode()") {
870     Object* obj = shadow_frame->GetVRegReference(arg_offset);
871     result->SetI(obj->IdentityHashCode());
872   } else if (name == "java.lang.String java.lang.reflect.ArtMethod.getMethodName(java.lang.reflect.ArtMethod)") {
873     StackHandleScope<1> hs(self);
874     MethodHelper mh(hs.NewHandle(shadow_frame->GetVRegReference(arg_offset)->AsArtMethod()));
875     result->SetL(mh.GetNameAsString(self));
876   } else if (name == "void java.lang.System.arraycopy(java.lang.Object, int, java.lang.Object, int, int)" ||
877              name == "void java.lang.System.arraycopy(char[], int, char[], int, int)") {
878     // Special case array copying without initializing System.
879     Class* ctype = shadow_frame->GetVRegReference(arg_offset)->GetClass()->GetComponentType();
880     jint srcPos = shadow_frame->GetVReg(arg_offset + 1);
881     jint dstPos = shadow_frame->GetVReg(arg_offset + 3);
882     jint length = shadow_frame->GetVReg(arg_offset + 4);
883     if (!ctype->IsPrimitive()) {
884       ObjectArray<Object>* src = shadow_frame->GetVRegReference(arg_offset)->AsObjectArray<Object>();
885       ObjectArray<Object>* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsObjectArray<Object>();
886       for (jint i = 0; i < length; ++i) {
887         dst->Set(dstPos + i, src->Get(srcPos + i));
888       }
889     } else if (ctype->IsPrimitiveChar()) {
890       CharArray* src = shadow_frame->GetVRegReference(arg_offset)->AsCharArray();
891       CharArray* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsCharArray();
892       for (jint i = 0; i < length; ++i) {
893         dst->Set(dstPos + i, src->Get(srcPos + i));
894       }
895     } else if (ctype->IsPrimitiveInt()) {
896       IntArray* src = shadow_frame->GetVRegReference(arg_offset)->AsIntArray();
897       IntArray* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsIntArray();
898       for (jint i = 0; i < length; ++i) {
899         dst->Set(dstPos + i, src->Get(srcPos + i));
900       }
901     } else {
902       self->ThrowNewExceptionF(self->GetCurrentLocationForThrow(), "Ljava/lang/InternalError;",
903                                "Unimplemented System.arraycopy for type '%s'",
904                                PrettyDescriptor(ctype).c_str());
905     }
906   } else  if (name == "java.lang.Object java.lang.ThreadLocal.get()") {
907     std::string caller(PrettyMethod(shadow_frame->GetLink()->GetMethod()));
908     if (caller == "java.lang.String java.lang.IntegralToString.convertInt(java.lang.AbstractStringBuilder, int)") {
909       // Allocate non-threadlocal buffer.
910       result->SetL(mirror::CharArray::Alloc(self, 11));
911     } else {
912       self->ThrowNewException(self->GetCurrentLocationForThrow(), "Ljava/lang/InternalError;",
913                               "Unimplemented ThreadLocal.get");
914     }
915   } else {
916     // Not special, continue with regular interpreter execution.
917     artInterpreterToInterpreterBridge(self, mh, code_item, shadow_frame, result);
918   }
919 }
920 
921 // Explicit DoCall template function declarations.
922 #define EXPLICIT_DO_CALL_TEMPLATE_DECL(_is_range, _do_assignability_check)                      \
923   template SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)                                          \
924   bool DoCall<_is_range, _do_assignability_check>(ArtMethod* method, Thread* self,              \
925                                                   ShadowFrame& shadow_frame,                    \
926                                                   const Instruction* inst, uint16_t inst_data,  \
927                                                   JValue* result)
928 EXPLICIT_DO_CALL_TEMPLATE_DECL(false, false);
929 EXPLICIT_DO_CALL_TEMPLATE_DECL(false, true);
930 EXPLICIT_DO_CALL_TEMPLATE_DECL(true, false);
931 EXPLICIT_DO_CALL_TEMPLATE_DECL(true, true);
932 #undef EXPLICIT_DO_CALL_TEMPLATE_DECL
933 
934 // Explicit DoFilledNewArray template function declarations.
935 #define EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(_is_range_, _check, _transaction_active)       \
936   template SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)                                            \
937   bool DoFilledNewArray<_is_range_, _check, _transaction_active>(const Instruction* inst,         \
938                                                                  const ShadowFrame& shadow_frame, \
939                                                                  Thread* self, JValue* result)
940 #define EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL(_transaction_active)       \
941   EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(false, false, _transaction_active);  \
942   EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(false, true, _transaction_active);   \
943   EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(true, false, _transaction_active);   \
944   EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(true, true, _transaction_active)
945 EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL(false);
946 EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL(true);
947 #undef EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL
948 #undef EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL
949 
950 }  // namespace interpreter
951 }  // namespace art
952