instrumentation.h revision 59d9d668d4f4286813afe2b4e7c6db839222ce96 
1/*
2 * Copyright (C) 2011 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#ifndef ART_RUNTIME_INSTRUMENTATION_H_
18#define ART_RUNTIME_INSTRUMENTATION_H_
19
20#include <stdint.h>
21#include <list>
22#include <map>
23
24#include "atomic.h"
25#include "instruction_set.h"
26#include "base/macros.h"
27#include "base/mutex.h"
28#include "gc_root.h"
29#include "object_callbacks.h"
30
31namespace art {
32namespace mirror {
33  class ArtField;
34  class ArtMethod;
35  class Class;
36  class Object;
37  class Throwable;
38}  // namespace mirror
39union JValue;
40class Thread;
41class ThrowLocation;
42
43namespace instrumentation {
44
45// Interpreter handler tables.
46enum InterpreterHandlerTable {
47  kMainHandlerTable = 0,          // Main handler table: no suspend check, no instrumentation.
48  kAlternativeHandlerTable = 1,   // Alternative handler table: suspend check and/or instrumentation
49                                  // enabled.
50  kNumHandlerTables
51};
52
53// Instrumentation event listener API. Registered listeners will get the appropriate call back for
54// the events they are listening for. The call backs supply the thread, method and dex_pc the event
55// occurred upon. The thread may or may not be Thread::Current().
56struct InstrumentationListener {
57  InstrumentationListener() {}
58  virtual ~InstrumentationListener() {}
59
60  // Call-back for when a method is entered.
61  virtual void MethodEntered(Thread* thread, mirror::Object* this_object,
62                             mirror::ArtMethod* method,
63                             uint32_t dex_pc) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
64
65  // Call-back for when a method is exited.
66  // TODO: its likely passing the return value would be useful, however, we may need to get and
67  //       parse the shorty to determine what kind of register holds the result.
68  virtual void MethodExited(Thread* thread, mirror::Object* this_object,
69                            mirror::ArtMethod* method, uint32_t dex_pc,
70                            const JValue& return_value)
71      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
72
73  // Call-back for when a method is popped due to an exception throw. A method will either cause a
74  // MethodExited call-back or a MethodUnwind call-back when its activation is removed.
75  virtual void MethodUnwind(Thread* thread, mirror::Object* this_object,
76                            mirror::ArtMethod* method, uint32_t dex_pc)
77      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
78
79  // Call-back for when the dex pc moves in a method.
80  virtual void DexPcMoved(Thread* thread, mirror::Object* this_object,
81                          mirror::ArtMethod* method, uint32_t new_dex_pc)
82      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
83
84  // Call-back for when we read from a field.
85  virtual void FieldRead(Thread* thread, mirror::Object* this_object, mirror::ArtMethod* method,
86                         uint32_t dex_pc, mirror::ArtField* field) = 0;
87
88  // Call-back for when we write into a field.
89  virtual void FieldWritten(Thread* thread, mirror::Object* this_object, mirror::ArtMethod* method,
90                            uint32_t dex_pc, mirror::ArtField* field, const JValue& field_value) = 0;
91
92  // Call-back when an exception is caught.
93  virtual void ExceptionCaught(Thread* thread, const ThrowLocation& throw_location,
94                               mirror::ArtMethod* catch_method, uint32_t catch_dex_pc,
95                               mirror::Throwable* exception_object)
96      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
97};
98
99// Instrumentation is a catch-all for when extra information is required from the runtime. The
100// typical use for instrumentation is for profiling and debugging. Instrumentation may add stubs
101// to method entry and exit, it may also force execution to be switched to the interpreter and
102// trigger deoptimization.
103class Instrumentation {
104 public:
105  enum InstrumentationEvent {
106    kMethodEntered =   1 << 0,
107    kMethodExited =    1 << 1,
108    kMethodUnwind =    1 << 2,
109    kDexPcMoved =      1 << 3,
110    kFieldRead =       1 << 4,
111    kFieldWritten =    1 << 5,
112    kExceptionCaught = 1 << 6,
113  };
114
115  Instrumentation();
116
117  // Add a listener to be notified of the masked together sent of instrumentation events. This
118  // suspend the runtime to install stubs. You are expected to hold the mutator lock as a proxy
119  // for saying you should have suspended all threads (installing stubs while threads are running
120  // will break).
121  void AddListener(InstrumentationListener* listener, uint32_t events)
122      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
123      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_);
124
125  // Removes a listener possibly removing instrumentation stubs.
126  void RemoveListener(InstrumentationListener* listener, uint32_t events)
127      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
128      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_);
129
130  // Deoptimization.
131  void EnableDeoptimization()
132      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
133      LOCKS_EXCLUDED(deoptimized_methods_lock_);
134  void DisableDeoptimization()
135      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
136      LOCKS_EXCLUDED(deoptimized_methods_lock_);
137  bool AreAllMethodsDeoptimized() const {
138    return interpreter_stubs_installed_;
139  }
140  bool ShouldNotifyMethodEnterExitEvents() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
141
142  // Executes everything with interpreter.
143  void DeoptimizeEverything()
144      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
145      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_);
146
147  // Executes everything with compiled code (or interpreter if there is no code).
148  void UndeoptimizeEverything()
149      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
150      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_);
151
152  // Deoptimize a method by forcing its execution with the interpreter. Nevertheless, a static
153  // method (except a class initializer) set to the resolution trampoline will be deoptimized only
154  // once its declaring class is initialized.
155  void Deoptimize(mirror::ArtMethod* method)
156      LOCKS_EXCLUDED(Locks::thread_list_lock_, deoptimized_methods_lock_)
157      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_);
158
159  // Undeoptimze the method by restoring its entrypoints. Nevertheless, a static method
160  // (except a class initializer) set to the resolution trampoline will be updated only once its
161  // declaring class is initialized.
162  void Undeoptimize(mirror::ArtMethod* method)
163      LOCKS_EXCLUDED(Locks::thread_list_lock_, deoptimized_methods_lock_)
164      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_);
165
166  bool IsDeoptimized(mirror::ArtMethod* method)
167      LOCKS_EXCLUDED(deoptimized_methods_lock_)
168      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
169
170  // Enable method tracing by installing instrumentation entry/exit stubs.
171  void EnableMethodTracing()
172      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
173      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_);
174
175  // Disable method tracing by uninstalling instrumentation entry/exit stubs.
176  void DisableMethodTracing()
177      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
178      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_);
179
180  InterpreterHandlerTable GetInterpreterHandlerTable() const
181      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
182    return interpreter_handler_table_;
183  }
184
185  void InstrumentQuickAllocEntryPoints() LOCKS_EXCLUDED(Locks::thread_list_lock_,
186                                                        Locks::runtime_shutdown_lock_);
187  void UninstrumentQuickAllocEntryPoints() LOCKS_EXCLUDED(Locks::thread_list_lock_,
188                                                          Locks::runtime_shutdown_lock_);
189  void ResetQuickAllocEntryPoints() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_);
190
191  // Update the code of a method respecting any installed stubs.
192  void UpdateMethodsCode(mirror::ArtMethod* method, const void* quick_code,
193                         const void* portable_code, bool have_portable_code)
194      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
195
196  // Get the quick code for the given method. More efficient than asking the class linker as it
197  // will short-cut to GetCode if instrumentation and static method resolution stubs aren't
198  // installed.
199  const void* GetQuickCodeFor(mirror::ArtMethod* method) const
200      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
201
202  void ForceInterpretOnly() {
203    interpret_only_ = true;
204    forced_interpret_only_ = true;
205  }
206
207  // Called by ArtMethod::Invoke to determine dispatch mechanism.
208  bool InterpretOnly() const {
209    return interpret_only_;
210  }
211
212  bool IsForcedInterpretOnly() const {
213    return forced_interpret_only_;
214  }
215
216  bool ShouldPortableCodeDeoptimize() const {
217    return instrumentation_stubs_installed_;
218  }
219
220  bool AreExitStubsInstalled() const {
221    return instrumentation_stubs_installed_;
222  }
223
224  bool HasMethodEntryListeners() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
225    return have_method_entry_listeners_;
226  }
227
228  bool HasMethodExitListeners() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
229    return have_method_exit_listeners_;
230  }
231
232  bool HasDexPcListeners() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
233    return have_dex_pc_listeners_;
234  }
235
236  bool HasFieldReadListeners() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
237    return have_field_read_listeners_;
238  }
239
240  bool HasFieldWriteListeners() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
241    return have_field_write_listeners_;
242  }
243
244  bool HasExceptionCaughtListeners() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
245    return have_exception_caught_listeners_;
246  }
247
248  bool IsActive() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
249    return have_dex_pc_listeners_ || have_method_entry_listeners_ || have_method_exit_listeners_ ||
250        have_field_read_listeners_ || have_field_write_listeners_ ||
251        have_exception_caught_listeners_ || have_method_unwind_listeners_;
252  }
253
254  // Inform listeners that a method has been entered. A dex PC is provided as we may install
255  // listeners into executing code and get method enter events for methods already on the stack.
256  void MethodEnterEvent(Thread* thread, mirror::Object* this_object,
257                        mirror::ArtMethod* method, uint32_t dex_pc) const
258      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
259    if (UNLIKELY(HasMethodEntryListeners())) {
260      MethodEnterEventImpl(thread, this_object, method, dex_pc);
261    }
262  }
263
264  // Inform listeners that a method has been exited.
265  void MethodExitEvent(Thread* thread, mirror::Object* this_object,
266                       mirror::ArtMethod* method, uint32_t dex_pc,
267                       const JValue& return_value) const
268      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
269    if (UNLIKELY(HasMethodExitListeners())) {
270      MethodExitEventImpl(thread, this_object, method, dex_pc, return_value);
271    }
272  }
273
274  // Inform listeners that a method has been exited due to an exception.
275  void MethodUnwindEvent(Thread* thread, mirror::Object* this_object,
276                         mirror::ArtMethod* method, uint32_t dex_pc) const
277      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
278
279  // Inform listeners that the dex pc has moved (only supported by the interpreter).
280  void DexPcMovedEvent(Thread* thread, mirror::Object* this_object,
281                       mirror::ArtMethod* method, uint32_t dex_pc) const
282      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
283    if (UNLIKELY(HasDexPcListeners())) {
284      DexPcMovedEventImpl(thread, this_object, method, dex_pc);
285    }
286  }
287
288  // Inform listeners that we read a field (only supported by the interpreter).
289  void FieldReadEvent(Thread* thread, mirror::Object* this_object,
290                      mirror::ArtMethod* method, uint32_t dex_pc,
291                      mirror::ArtField* field) const
292      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
293    if (UNLIKELY(HasFieldReadListeners())) {
294      FieldReadEventImpl(thread, this_object, method, dex_pc, field);
295    }
296  }
297
298  // Inform listeners that we write a field (only supported by the interpreter).
299  void FieldWriteEvent(Thread* thread, mirror::Object* this_object,
300                       mirror::ArtMethod* method, uint32_t dex_pc,
301                       mirror::ArtField* field, const JValue& field_value) const
302      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
303    if (UNLIKELY(HasFieldWriteListeners())) {
304      FieldWriteEventImpl(thread, this_object, method, dex_pc, field, field_value);
305    }
306  }
307
308  // Inform listeners that an exception was caught.
309  void ExceptionCaughtEvent(Thread* thread, const ThrowLocation& throw_location,
310                            mirror::ArtMethod* catch_method, uint32_t catch_dex_pc,
311                            mirror::Throwable* exception_object) const
312      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
313
314  // Called when an instrumented method is entered. The intended link register (lr) is saved so
315  // that returning causes a branch to the method exit stub. Generates method enter events.
316  void PushInstrumentationStackFrame(Thread* self, mirror::Object* this_object,
317                                     mirror::ArtMethod* method, uintptr_t lr,
318                                     bool interpreter_entry)
319      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
320
321  // Called when an instrumented method is exited. Removes the pushed instrumentation frame
322  // returning the intended link register. Generates method exit events.
323  TwoWordReturn PopInstrumentationStackFrame(Thread* self, uintptr_t* return_pc,
324                                             uint64_t gpr_result, uint64_t fpr_result)
325      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
326
327  // Pops an instrumentation frame from the current thread and generate an unwind event.
328  void PopMethodForUnwind(Thread* self, bool is_deoptimization) const
329      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
330
331  // Call back for configure stubs.
332  bool InstallStubsForClass(mirror::Class* klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
333
334  void InstallStubsForMethod(mirror::ArtMethod* method)
335      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
336
337  void VisitRoots(RootCallback* callback, void* arg) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
338      LOCKS_EXCLUDED(deoptimized_methods_lock_);
339
340 private:
341  // Does the job of installing or removing instrumentation code within methods.
342  void ConfigureStubs(bool require_entry_exit_stubs, bool require_interpreter)
343      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_)
344      LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::classlinker_classes_lock_,
345                     deoptimized_methods_lock_);
346
347  void UpdateInterpreterHandlerTable() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_) {
348    interpreter_handler_table_ = IsActive() ? kAlternativeHandlerTable : kMainHandlerTable;
349  }
350
351  // No thread safety analysis to get around SetQuickAllocEntryPointsInstrumented requiring
352  // exclusive access to mutator lock which you can't get if the runtime isn't started.
353  void SetEntrypointsInstrumented(bool instrumented) NO_THREAD_SAFETY_ANALYSIS;
354
355  void MethodEnterEventImpl(Thread* thread, mirror::Object* this_object,
356                            mirror::ArtMethod* method, uint32_t dex_pc) const
357      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
358  void MethodExitEventImpl(Thread* thread, mirror::Object* this_object,
359                           mirror::ArtMethod* method,
360                           uint32_t dex_pc, const JValue& return_value) const
361      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
362  void DexPcMovedEventImpl(Thread* thread, mirror::Object* this_object,
363                           mirror::ArtMethod* method, uint32_t dex_pc) const
364      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
365  void FieldReadEventImpl(Thread* thread, mirror::Object* this_object,
366                           mirror::ArtMethod* method, uint32_t dex_pc,
367                           mirror::ArtField* field) const
368      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
369  void FieldWriteEventImpl(Thread* thread, mirror::Object* this_object,
370                           mirror::ArtMethod* method, uint32_t dex_pc,
371                           mirror::ArtField* field, const JValue& field_value) const
372      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
373
374  // Read barrier-aware utility functions for accessing deoptimized_methods_
375  bool AddDeoptimizedMethod(mirror::ArtMethod* method)
376      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
377      EXCLUSIVE_LOCKS_REQUIRED(deoptimized_methods_lock_);
378  bool FindDeoptimizedMethod(mirror::ArtMethod* method)
379      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
380      SHARED_LOCKS_REQUIRED(deoptimized_methods_lock_);
381  bool RemoveDeoptimizedMethod(mirror::ArtMethod* method)
382      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
383      EXCLUSIVE_LOCKS_REQUIRED(deoptimized_methods_lock_);
384  mirror::ArtMethod* BeginDeoptimizedMethod()
385      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
386      SHARED_LOCKS_REQUIRED(deoptimized_methods_lock_);
387  bool IsDeoptimizedMethodsEmpty() const
388      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
389      SHARED_LOCKS_REQUIRED(deoptimized_methods_lock_);
390
391  // Have we hijacked ArtMethod::code_ so that it calls instrumentation/interpreter code?
392  bool instrumentation_stubs_installed_;
393
394  // Have we hijacked ArtMethod::code_ to reference the enter/exit stubs?
395  bool entry_exit_stubs_installed_;
396
397  // Have we hijacked ArtMethod::code_ to reference the enter interpreter stub?
398  bool interpreter_stubs_installed_;
399
400  // Do we need the fidelity of events that we only get from running within the interpreter?
401  bool interpret_only_;
402
403  // Did the runtime request we only run in the interpreter? ie -Xint mode.
404  bool forced_interpret_only_;
405
406  // Do we have any listeners for method entry events? Short-cut to avoid taking the
407  // instrumentation_lock_.
408  bool have_method_entry_listeners_ GUARDED_BY(Locks::mutator_lock_);
409
410  // Do we have any listeners for method exit events? Short-cut to avoid taking the
411  // instrumentation_lock_.
412  bool have_method_exit_listeners_ GUARDED_BY(Locks::mutator_lock_);
413
414  // Do we have any listeners for method unwind events? Short-cut to avoid taking the
415  // instrumentation_lock_.
416  bool have_method_unwind_listeners_ GUARDED_BY(Locks::mutator_lock_);
417
418  // Do we have any listeners for dex move events? Short-cut to avoid taking the
419  // instrumentation_lock_.
420  bool have_dex_pc_listeners_ GUARDED_BY(Locks::mutator_lock_);
421
422  // Do we have any listeners for field read events? Short-cut to avoid taking the
423  // instrumentation_lock_.
424  bool have_field_read_listeners_ GUARDED_BY(Locks::mutator_lock_);
425
426  // Do we have any listeners for field write events? Short-cut to avoid taking the
427  // instrumentation_lock_.
428  bool have_field_write_listeners_ GUARDED_BY(Locks::mutator_lock_);
429
430  // Do we have any exception caught listeners? Short-cut to avoid taking the instrumentation_lock_.
431  bool have_exception_caught_listeners_ GUARDED_BY(Locks::mutator_lock_);
432
433  // The event listeners, written to with the mutator_lock_ exclusively held.
434  std::list<InstrumentationListener*> method_entry_listeners_ GUARDED_BY(Locks::mutator_lock_);
435  std::list<InstrumentationListener*> method_exit_listeners_ GUARDED_BY(Locks::mutator_lock_);
436  std::list<InstrumentationListener*> method_unwind_listeners_ GUARDED_BY(Locks::mutator_lock_);
437  std::shared_ptr<std::list<InstrumentationListener*>> dex_pc_listeners_
438      GUARDED_BY(Locks::mutator_lock_);
439  std::shared_ptr<std::list<InstrumentationListener*>> field_read_listeners_
440      GUARDED_BY(Locks::mutator_lock_);
441  std::shared_ptr<std::list<InstrumentationListener*>> field_write_listeners_
442      GUARDED_BY(Locks::mutator_lock_);
443  std::shared_ptr<std::list<InstrumentationListener*>> exception_caught_listeners_
444      GUARDED_BY(Locks::mutator_lock_);
445
446  // The set of methods being deoptimized (by the debugger) which must be executed with interpreter
447  // only.
448  mutable ReaderWriterMutex deoptimized_methods_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
449  std::multimap<int32_t, GcRoot<mirror::ArtMethod>> deoptimized_methods_
450      GUARDED_BY(deoptimized_methods_lock_);
451  bool deoptimization_enabled_;
452
453  // Current interpreter handler table. This is updated each time the thread state flags are
454  // modified.
455  InterpreterHandlerTable interpreter_handler_table_ GUARDED_BY(Locks::mutator_lock_);
456
457  // Greater than 0 if quick alloc entry points instrumented.
458  // TODO: The access and changes to this is racy and should be guarded by a lock.
459  AtomicInteger quick_alloc_entry_points_instrumentation_counter_;
460
461  DISALLOW_COPY_AND_ASSIGN(Instrumentation);
462};
463
464// An element in the instrumentation side stack maintained in art::Thread.
465struct InstrumentationStackFrame {
466  InstrumentationStackFrame(mirror::Object* this_object, mirror::ArtMethod* method,
467                            uintptr_t return_pc, size_t frame_id, bool interpreter_entry)
468      : this_object_(this_object), method_(method), return_pc_(return_pc), frame_id_(frame_id),
469        interpreter_entry_(interpreter_entry) {
470  }
471
472  std::string Dump() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
473
474  mirror::Object* this_object_;
475  mirror::ArtMethod* method_;
476  uintptr_t return_pc_;
477  size_t frame_id_;
478  bool interpreter_entry_;
479};
480
481}  // namespace instrumentation
482}  // namespace art
483
484#endif  // ART_RUNTIME_INSTRUMENTATION_H_
485