1 /* Copyright (C) 2016 The Android Open Source Project
2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3  *
4  * This file implements interfaces from the file jvmti.h. This implementation
5  * is licensed under the same terms as the file jvmti.h.  The
6  * copyright and license information for the file jvmti.h follows.
7  *
8  * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
9  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
10  *
11  * This code is free software; you can redistribute it and/or modify it
12  * under the terms of the GNU General Public License version 2 only, as
13  * published by the Free Software Foundation.  Oracle designates this
14  * particular file as subject to the "Classpath" exception as provided
15  * by Oracle in the LICENSE file that accompanied this code.
16  *
17  * This code is distributed in the hope that it will be useful, but WITHOUT
18  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
20  * version 2 for more details (a copy is included in the LICENSE file that
21  * accompanied this code).
22  *
23  * You should have received a copy of the GNU General Public License version
24  * 2 along with this work; if not, write to the Free Software Foundation,
25  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
26  *
27  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
28  * or visit www.oracle.com if you need additional information or have any
29  * questions.
30  */
31 
32 #include <string>
33 #include <type_traits>
34 #include <vector>
35 
36 #include <android-base/logging.h>
37 
38 #include <jni.h>
39 
40 #include "jvmti.h"
41 
42 #include "art_jvmti.h"
43 #include "base/logging.h"  // For gLogVerbosity.
44 #include "base/mutex.h"
45 #include "events-inl.h"
46 #include "jni_env_ext-inl.h"
47 #include "obj_ptr-inl.h"
48 #include "object_tagging.h"
49 #include "runtime.h"
50 #include "scoped_thread_state_change-inl.h"
51 #include "thread-current-inl.h"
52 #include "thread_list.h"
53 #include "ti_allocator.h"
54 #include "ti_breakpoint.h"
55 #include "ti_class.h"
56 #include "ti_dump.h"
57 #include "ti_extension.h"
58 #include "ti_field.h"
59 #include "ti_heap.h"
60 #include "ti_jni.h"
61 #include "ti_method.h"
62 #include "ti_monitor.h"
63 #include "ti_object.h"
64 #include "ti_phase.h"
65 #include "ti_properties.h"
66 #include "ti_redefine.h"
67 #include "ti_search.h"
68 #include "ti_stack.h"
69 #include "ti_thread.h"
70 #include "ti_threadgroup.h"
71 #include "ti_timers.h"
72 #include "transform.h"
73 
74 namespace openjdkjvmti {
75 
76 // NB These are heap allocated to avoid the static destructors being run if an agent calls exit(3).
77 // These should never be null.
78 EventHandler* gEventHandler;
79 DeoptManager* gDeoptManager;
80 
81 #define ENSURE_NON_NULL(n)      \
82   do {                          \
83     if ((n) == nullptr) {       \
84       return ERR(NULL_POINTER); \
85     }                           \
86   } while (false)
87 
88 // Returns whether we are able to use all jvmti features.
IsFullJvmtiAvailable()89 static bool IsFullJvmtiAvailable() {
90   art::Runtime* runtime = art::Runtime::Current();
91   return runtime->GetInstrumentation()->IsForcedInterpretOnly() || runtime->IsJavaDebuggable();
92 }
93 
94 class JvmtiFunctions {
95  private:
getEnvironmentError(jvmtiEnv * env)96   static jvmtiError getEnvironmentError(jvmtiEnv* env) {
97     if (env == nullptr) {
98       return ERR(INVALID_ENVIRONMENT);
99     } else if (art::Thread::Current() == nullptr) {
100       return ERR(UNATTACHED_THREAD);
101     } else {
102       return OK;
103     }
104   }
105 
106 #define ENSURE_VALID_ENV(env)                                            \
107   do {                                                                   \
108     jvmtiError ensure_valid_env_ ## __LINE__ = getEnvironmentError(env); \
109     if (ensure_valid_env_ ## __LINE__ != OK) {                           \
110       return ensure_valid_env_ ## __LINE__ ;                             \
111     }                                                                    \
112   } while (false)
113 
114 #define ENSURE_HAS_CAP(env, cap) \
115   do { \
116     if (ArtJvmTiEnv::AsArtJvmTiEnv(env)->capabilities.cap != 1) { \
117       return ERR(MUST_POSSESS_CAPABILITY); \
118     } \
119   } while (false)
120 
121  public:
Allocate(jvmtiEnv * env,jlong size,unsigned char ** mem_ptr)122   static jvmtiError Allocate(jvmtiEnv* env, jlong size, unsigned char** mem_ptr) {
123     ENSURE_VALID_ENV(env);
124     ENSURE_NON_NULL(mem_ptr);
125     return AllocUtil::Allocate(env, size, mem_ptr);
126   }
127 
Deallocate(jvmtiEnv * env,unsigned char * mem)128   static jvmtiError Deallocate(jvmtiEnv* env, unsigned char* mem) {
129     ENSURE_VALID_ENV(env);
130     return AllocUtil::Deallocate(env, mem);
131   }
132 
GetThreadState(jvmtiEnv * env,jthread thread,jint * thread_state_ptr)133   static jvmtiError GetThreadState(jvmtiEnv* env, jthread thread, jint* thread_state_ptr) {
134     ENSURE_VALID_ENV(env);
135     return ThreadUtil::GetThreadState(env, thread, thread_state_ptr);
136   }
137 
GetCurrentThread(jvmtiEnv * env,jthread * thread_ptr)138   static jvmtiError GetCurrentThread(jvmtiEnv* env, jthread* thread_ptr) {
139     ENSURE_VALID_ENV(env);
140     return ThreadUtil::GetCurrentThread(env, thread_ptr);
141   }
142 
GetAllThreads(jvmtiEnv * env,jint * threads_count_ptr,jthread ** threads_ptr)143   static jvmtiError GetAllThreads(jvmtiEnv* env, jint* threads_count_ptr, jthread** threads_ptr) {
144     ENSURE_VALID_ENV(env);
145     return ThreadUtil::GetAllThreads(env, threads_count_ptr, threads_ptr);
146   }
147 
SuspendThread(jvmtiEnv * env,jthread thread)148   static jvmtiError SuspendThread(jvmtiEnv* env, jthread thread) {
149     ENSURE_VALID_ENV(env);
150     ENSURE_HAS_CAP(env, can_suspend);
151     return ThreadUtil::SuspendThread(env, thread);
152   }
153 
SuspendThreadList(jvmtiEnv * env,jint request_count,const jthread * request_list,jvmtiError * results)154   static jvmtiError SuspendThreadList(jvmtiEnv* env,
155                                       jint request_count,
156                                       const jthread* request_list,
157                                       jvmtiError* results) {
158     ENSURE_VALID_ENV(env);
159     ENSURE_HAS_CAP(env, can_suspend);
160     return ThreadUtil::SuspendThreadList(env, request_count, request_list, results);
161   }
162 
ResumeThread(jvmtiEnv * env,jthread thread)163   static jvmtiError ResumeThread(jvmtiEnv* env, jthread thread) {
164     ENSURE_VALID_ENV(env);
165     ENSURE_HAS_CAP(env, can_suspend);
166     return ThreadUtil::ResumeThread(env, thread);
167   }
168 
ResumeThreadList(jvmtiEnv * env,jint request_count,const jthread * request_list,jvmtiError * results)169   static jvmtiError ResumeThreadList(jvmtiEnv* env,
170                                      jint request_count,
171                                      const jthread* request_list,
172                                      jvmtiError* results) {
173     ENSURE_VALID_ENV(env);
174     ENSURE_HAS_CAP(env, can_suspend);
175     return ThreadUtil::ResumeThreadList(env, request_count, request_list, results);
176   }
177 
StopThread(jvmtiEnv * env,jthread thread,jobject exception)178   static jvmtiError StopThread(jvmtiEnv* env, jthread thread, jobject exception) {
179     ENSURE_VALID_ENV(env);
180     ENSURE_HAS_CAP(env, can_signal_thread);
181     return ThreadUtil::StopThread(env, thread, exception);
182   }
183 
InterruptThread(jvmtiEnv * env,jthread thread)184   static jvmtiError InterruptThread(jvmtiEnv* env, jthread thread) {
185     ENSURE_VALID_ENV(env);
186     ENSURE_HAS_CAP(env, can_signal_thread);
187     return ThreadUtil::InterruptThread(env, thread);
188   }
189 
GetThreadInfo(jvmtiEnv * env,jthread thread,jvmtiThreadInfo * info_ptr)190   static jvmtiError GetThreadInfo(jvmtiEnv* env, jthread thread, jvmtiThreadInfo* info_ptr) {
191     ENSURE_VALID_ENV(env);
192     return ThreadUtil::GetThreadInfo(env, thread, info_ptr);
193   }
194 
GetOwnedMonitorInfo(jvmtiEnv * env,jthread thread,jint * owned_monitor_count_ptr,jobject ** owned_monitors_ptr)195   static jvmtiError GetOwnedMonitorInfo(jvmtiEnv* env,
196                                         jthread thread,
197                                         jint* owned_monitor_count_ptr,
198                                         jobject** owned_monitors_ptr) {
199     ENSURE_VALID_ENV(env);
200     ENSURE_HAS_CAP(env, can_get_owned_monitor_info);
201     return StackUtil::GetOwnedMonitorInfo(env,
202                                           thread,
203                                           owned_monitor_count_ptr,
204                                           owned_monitors_ptr);
205   }
206 
GetOwnedMonitorStackDepthInfo(jvmtiEnv * env,jthread thread,jint * monitor_info_count_ptr,jvmtiMonitorStackDepthInfo ** monitor_info_ptr)207   static jvmtiError GetOwnedMonitorStackDepthInfo(jvmtiEnv* env,
208                                                   jthread thread,
209                                                   jint* monitor_info_count_ptr,
210                                                   jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
211     ENSURE_VALID_ENV(env);
212     ENSURE_HAS_CAP(env, can_get_owned_monitor_stack_depth_info);
213     return StackUtil::GetOwnedMonitorStackDepthInfo(env,
214                                                     thread,
215                                                     monitor_info_count_ptr,
216                                                     monitor_info_ptr);
217   }
218 
GetCurrentContendedMonitor(jvmtiEnv * env,jthread thread,jobject * monitor_ptr)219   static jvmtiError GetCurrentContendedMonitor(jvmtiEnv* env,
220                                                jthread thread,
221                                                jobject* monitor_ptr) {
222     ENSURE_VALID_ENV(env);
223     ENSURE_HAS_CAP(env, can_get_current_contended_monitor);
224     return MonitorUtil::GetCurrentContendedMonitor(env, thread, monitor_ptr);
225   }
226 
RunAgentThread(jvmtiEnv * env,jthread thread,jvmtiStartFunction proc,const void * arg,jint priority)227   static jvmtiError RunAgentThread(jvmtiEnv* env,
228                                    jthread thread,
229                                    jvmtiStartFunction proc,
230                                    const void* arg,
231                                    jint priority) {
232     ENSURE_VALID_ENV(env);
233     return ThreadUtil::RunAgentThread(env, thread, proc, arg, priority);
234   }
235 
SetThreadLocalStorage(jvmtiEnv * env,jthread thread,const void * data)236   static jvmtiError SetThreadLocalStorage(jvmtiEnv* env, jthread thread, const void* data) {
237     ENSURE_VALID_ENV(env);
238     return ThreadUtil::SetThreadLocalStorage(env, thread, data);
239   }
240 
GetThreadLocalStorage(jvmtiEnv * env,jthread thread,void ** data_ptr)241   static jvmtiError GetThreadLocalStorage(jvmtiEnv* env, jthread thread, void** data_ptr) {
242     ENSURE_VALID_ENV(env);
243     return ThreadUtil::GetThreadLocalStorage(env, thread, data_ptr);
244   }
245 
GetTopThreadGroups(jvmtiEnv * env,jint * group_count_ptr,jthreadGroup ** groups_ptr)246   static jvmtiError GetTopThreadGroups(jvmtiEnv* env,
247                                        jint* group_count_ptr,
248                                        jthreadGroup** groups_ptr) {
249     ENSURE_VALID_ENV(env);
250     return ThreadGroupUtil::GetTopThreadGroups(env, group_count_ptr, groups_ptr);
251   }
252 
GetThreadGroupInfo(jvmtiEnv * env,jthreadGroup group,jvmtiThreadGroupInfo * info_ptr)253   static jvmtiError GetThreadGroupInfo(jvmtiEnv* env,
254                                        jthreadGroup group,
255                                        jvmtiThreadGroupInfo* info_ptr) {
256     ENSURE_VALID_ENV(env);
257     return ThreadGroupUtil::GetThreadGroupInfo(env, group, info_ptr);
258   }
259 
GetThreadGroupChildren(jvmtiEnv * env,jthreadGroup group,jint * thread_count_ptr,jthread ** threads_ptr,jint * group_count_ptr,jthreadGroup ** groups_ptr)260   static jvmtiError GetThreadGroupChildren(jvmtiEnv* env,
261                                            jthreadGroup group,
262                                            jint* thread_count_ptr,
263                                            jthread** threads_ptr,
264                                            jint* group_count_ptr,
265                                            jthreadGroup** groups_ptr) {
266     ENSURE_VALID_ENV(env);
267     return ThreadGroupUtil::GetThreadGroupChildren(env,
268                                                    group,
269                                                    thread_count_ptr,
270                                                    threads_ptr,
271                                                    group_count_ptr,
272                                                    groups_ptr);
273   }
274 
GetStackTrace(jvmtiEnv * env,jthread thread,jint start_depth,jint max_frame_count,jvmtiFrameInfo * frame_buffer,jint * count_ptr)275   static jvmtiError GetStackTrace(jvmtiEnv* env,
276                                   jthread thread,
277                                   jint start_depth,
278                                   jint max_frame_count,
279                                   jvmtiFrameInfo* frame_buffer,
280                                   jint* count_ptr) {
281     ENSURE_VALID_ENV(env);
282     return StackUtil::GetStackTrace(env,
283                                     thread,
284                                     start_depth,
285                                     max_frame_count,
286                                     frame_buffer,
287                                     count_ptr);
288   }
289 
GetAllStackTraces(jvmtiEnv * env,jint max_frame_count,jvmtiStackInfo ** stack_info_ptr,jint * thread_count_ptr)290   static jvmtiError GetAllStackTraces(jvmtiEnv* env,
291                                       jint max_frame_count,
292                                       jvmtiStackInfo** stack_info_ptr,
293                                       jint* thread_count_ptr) {
294     ENSURE_VALID_ENV(env);
295     return StackUtil::GetAllStackTraces(env, max_frame_count, stack_info_ptr, thread_count_ptr);
296   }
297 
GetThreadListStackTraces(jvmtiEnv * env,jint thread_count,const jthread * thread_list,jint max_frame_count,jvmtiStackInfo ** stack_info_ptr)298   static jvmtiError GetThreadListStackTraces(jvmtiEnv* env,
299                                              jint thread_count,
300                                              const jthread* thread_list,
301                                              jint max_frame_count,
302                                              jvmtiStackInfo** stack_info_ptr) {
303     ENSURE_VALID_ENV(env);
304     return StackUtil::GetThreadListStackTraces(env,
305                                                thread_count,
306                                                thread_list,
307                                                max_frame_count,
308                                                stack_info_ptr);
309   }
310 
GetFrameCount(jvmtiEnv * env,jthread thread,jint * count_ptr)311   static jvmtiError GetFrameCount(jvmtiEnv* env, jthread thread, jint* count_ptr) {
312     ENSURE_VALID_ENV(env);
313     return StackUtil::GetFrameCount(env, thread, count_ptr);
314   }
315 
PopFrame(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED)316   static jvmtiError PopFrame(jvmtiEnv* env, jthread thread ATTRIBUTE_UNUSED) {
317     ENSURE_VALID_ENV(env);
318     ENSURE_HAS_CAP(env, can_pop_frame);
319     return ERR(NOT_IMPLEMENTED);
320   }
321 
GetFrameLocation(jvmtiEnv * env,jthread thread,jint depth,jmethodID * method_ptr,jlocation * location_ptr)322   static jvmtiError GetFrameLocation(jvmtiEnv* env,
323                                      jthread thread,
324                                      jint depth,
325                                      jmethodID* method_ptr,
326                                      jlocation* location_ptr) {
327     ENSURE_VALID_ENV(env);
328     return StackUtil::GetFrameLocation(env, thread, depth, method_ptr, location_ptr);
329   }
330 
NotifyFramePop(jvmtiEnv * env,jthread thread,jint depth)331   static jvmtiError NotifyFramePop(jvmtiEnv* env, jthread thread, jint depth) {
332     ENSURE_VALID_ENV(env);
333     ENSURE_HAS_CAP(env, can_generate_frame_pop_events);
334     return StackUtil::NotifyFramePop(env, thread, depth);
335   }
336 
ForceEarlyReturnObject(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED,jobject value ATTRIBUTE_UNUSED)337   static jvmtiError ForceEarlyReturnObject(jvmtiEnv* env,
338                                            jthread thread ATTRIBUTE_UNUSED,
339                                            jobject value ATTRIBUTE_UNUSED) {
340     ENSURE_VALID_ENV(env);
341     ENSURE_HAS_CAP(env, can_force_early_return);
342     return ERR(NOT_IMPLEMENTED);
343   }
344 
ForceEarlyReturnInt(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED,jint value ATTRIBUTE_UNUSED)345   static jvmtiError ForceEarlyReturnInt(jvmtiEnv* env,
346                                         jthread thread ATTRIBUTE_UNUSED,
347                                         jint value ATTRIBUTE_UNUSED) {
348     ENSURE_VALID_ENV(env);
349     ENSURE_HAS_CAP(env, can_force_early_return);
350     return ERR(NOT_IMPLEMENTED);
351   }
352 
ForceEarlyReturnLong(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED,jlong value ATTRIBUTE_UNUSED)353   static jvmtiError ForceEarlyReturnLong(jvmtiEnv* env,
354                                          jthread thread ATTRIBUTE_UNUSED,
355                                          jlong value ATTRIBUTE_UNUSED) {
356     ENSURE_VALID_ENV(env);
357     ENSURE_HAS_CAP(env, can_force_early_return);
358     return ERR(NOT_IMPLEMENTED);
359   }
360 
ForceEarlyReturnFloat(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED,jfloat value ATTRIBUTE_UNUSED)361   static jvmtiError ForceEarlyReturnFloat(jvmtiEnv* env,
362                                           jthread thread ATTRIBUTE_UNUSED,
363                                           jfloat value ATTRIBUTE_UNUSED) {
364     ENSURE_VALID_ENV(env);
365     ENSURE_HAS_CAP(env, can_force_early_return);
366     return ERR(NOT_IMPLEMENTED);
367   }
368 
ForceEarlyReturnDouble(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED,jdouble value ATTRIBUTE_UNUSED)369   static jvmtiError ForceEarlyReturnDouble(jvmtiEnv* env,
370                                            jthread thread ATTRIBUTE_UNUSED,
371                                            jdouble value ATTRIBUTE_UNUSED) {
372     ENSURE_VALID_ENV(env);
373     ENSURE_HAS_CAP(env, can_force_early_return);
374     return ERR(NOT_IMPLEMENTED);
375   }
376 
ForceEarlyReturnVoid(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED)377   static jvmtiError ForceEarlyReturnVoid(jvmtiEnv* env, jthread thread ATTRIBUTE_UNUSED) {
378     ENSURE_VALID_ENV(env);
379     ENSURE_HAS_CAP(env, can_force_early_return);
380     return ERR(NOT_IMPLEMENTED);
381   }
382 
FollowReferences(jvmtiEnv * env,jint heap_filter,jclass klass,jobject initial_object,const jvmtiHeapCallbacks * callbacks,const void * user_data)383   static jvmtiError FollowReferences(jvmtiEnv* env,
384                                      jint heap_filter,
385                                      jclass klass,
386                                      jobject initial_object,
387                                      const jvmtiHeapCallbacks* callbacks,
388                                      const void* user_data) {
389     ENSURE_VALID_ENV(env);
390     ENSURE_HAS_CAP(env, can_tag_objects);
391     HeapUtil heap_util(ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table.get());
392     return heap_util.FollowReferences(env,
393                                       heap_filter,
394                                       klass,
395                                       initial_object,
396                                       callbacks,
397                                       user_data);
398   }
399 
IterateThroughHeap(jvmtiEnv * env,jint heap_filter,jclass klass,const jvmtiHeapCallbacks * callbacks,const void * user_data)400   static jvmtiError IterateThroughHeap(jvmtiEnv* env,
401                                        jint heap_filter,
402                                        jclass klass,
403                                        const jvmtiHeapCallbacks* callbacks,
404                                        const void* user_data) {
405     ENSURE_VALID_ENV(env);
406     ENSURE_HAS_CAP(env, can_tag_objects);
407     HeapUtil heap_util(ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table.get());
408     return heap_util.IterateThroughHeap(env, heap_filter, klass, callbacks, user_data);
409   }
410 
GetTag(jvmtiEnv * env,jobject object,jlong * tag_ptr)411   static jvmtiError GetTag(jvmtiEnv* env, jobject object, jlong* tag_ptr) {
412     ENSURE_VALID_ENV(env);
413     ENSURE_HAS_CAP(env, can_tag_objects);
414 
415     JNIEnv* jni_env = GetJniEnv(env);
416     if (jni_env == nullptr) {
417       return ERR(INTERNAL);
418     }
419 
420     art::ScopedObjectAccess soa(jni_env);
421     art::ObjPtr<art::mirror::Object> obj = soa.Decode<art::mirror::Object>(object);
422     if (!ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table->GetTag(obj.Ptr(), tag_ptr)) {
423       *tag_ptr = 0;
424     }
425 
426     return ERR(NONE);
427   }
428 
SetTag(jvmtiEnv * env,jobject object,jlong tag)429   static jvmtiError SetTag(jvmtiEnv* env, jobject object, jlong tag) {
430     ENSURE_VALID_ENV(env);
431     ENSURE_HAS_CAP(env, can_tag_objects);
432 
433     if (object == nullptr) {
434       return ERR(NULL_POINTER);
435     }
436 
437     JNIEnv* jni_env = GetJniEnv(env);
438     if (jni_env == nullptr) {
439       return ERR(INTERNAL);
440     }
441 
442     art::ScopedObjectAccess soa(jni_env);
443     art::ObjPtr<art::mirror::Object> obj = soa.Decode<art::mirror::Object>(object);
444     ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table->Set(obj.Ptr(), tag);
445 
446     return ERR(NONE);
447   }
448 
GetObjectsWithTags(jvmtiEnv * env,jint tag_count,const jlong * tags,jint * count_ptr,jobject ** object_result_ptr,jlong ** tag_result_ptr)449   static jvmtiError GetObjectsWithTags(jvmtiEnv* env,
450                                        jint tag_count,
451                                        const jlong* tags,
452                                        jint* count_ptr,
453                                        jobject** object_result_ptr,
454                                        jlong** tag_result_ptr) {
455     ENSURE_VALID_ENV(env);
456     ENSURE_HAS_CAP(env, can_tag_objects);
457 
458     JNIEnv* jni_env = GetJniEnv(env);
459     if (jni_env == nullptr) {
460       return ERR(INTERNAL);
461     }
462 
463     art::ScopedObjectAccess soa(jni_env);
464     return ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table->GetTaggedObjects(env,
465                                                                                tag_count,
466                                                                                tags,
467                                                                                count_ptr,
468                                                                                object_result_ptr,
469                                                                                tag_result_ptr);
470   }
471 
ForceGarbageCollection(jvmtiEnv * env)472   static jvmtiError ForceGarbageCollection(jvmtiEnv* env) {
473     ENSURE_VALID_ENV(env);
474     return HeapUtil::ForceGarbageCollection(env);
475   }
476 
IterateOverObjectsReachableFromObject(jvmtiEnv * env,jobject object ATTRIBUTE_UNUSED,jvmtiObjectReferenceCallback object_reference_callback ATTRIBUTE_UNUSED,const void * user_data ATTRIBUTE_UNUSED)477   static jvmtiError IterateOverObjectsReachableFromObject(
478       jvmtiEnv* env,
479       jobject object ATTRIBUTE_UNUSED,
480       jvmtiObjectReferenceCallback object_reference_callback ATTRIBUTE_UNUSED,
481       const void* user_data ATTRIBUTE_UNUSED) {
482     ENSURE_VALID_ENV(env);
483     ENSURE_HAS_CAP(env, can_tag_objects);
484     return ERR(NOT_IMPLEMENTED);
485   }
486 
IterateOverReachableObjects(jvmtiEnv * env,jvmtiHeapRootCallback heap_root_callback ATTRIBUTE_UNUSED,jvmtiStackReferenceCallback stack_ref_callback ATTRIBUTE_UNUSED,jvmtiObjectReferenceCallback object_ref_callback ATTRIBUTE_UNUSED,const void * user_data ATTRIBUTE_UNUSED)487   static jvmtiError IterateOverReachableObjects(
488       jvmtiEnv* env,
489       jvmtiHeapRootCallback heap_root_callback ATTRIBUTE_UNUSED,
490       jvmtiStackReferenceCallback stack_ref_callback ATTRIBUTE_UNUSED,
491       jvmtiObjectReferenceCallback object_ref_callback ATTRIBUTE_UNUSED,
492       const void* user_data ATTRIBUTE_UNUSED) {
493     ENSURE_VALID_ENV(env);
494     ENSURE_HAS_CAP(env, can_tag_objects);
495     return ERR(NOT_IMPLEMENTED);
496   }
497 
IterateOverHeap(jvmtiEnv * env,jvmtiHeapObjectFilter object_filter ATTRIBUTE_UNUSED,jvmtiHeapObjectCallback heap_object_callback ATTRIBUTE_UNUSED,const void * user_data ATTRIBUTE_UNUSED)498   static jvmtiError IterateOverHeap(jvmtiEnv* env,
499                                     jvmtiHeapObjectFilter object_filter ATTRIBUTE_UNUSED,
500                                     jvmtiHeapObjectCallback heap_object_callback ATTRIBUTE_UNUSED,
501                                     const void* user_data ATTRIBUTE_UNUSED) {
502     ENSURE_VALID_ENV(env);
503     ENSURE_HAS_CAP(env, can_tag_objects);
504     return ERR(NOT_IMPLEMENTED);
505   }
506 
IterateOverInstancesOfClass(jvmtiEnv * env,jclass klass ATTRIBUTE_UNUSED,jvmtiHeapObjectFilter object_filter ATTRIBUTE_UNUSED,jvmtiHeapObjectCallback heap_object_callback ATTRIBUTE_UNUSED,const void * user_data ATTRIBUTE_UNUSED)507   static jvmtiError IterateOverInstancesOfClass(
508       jvmtiEnv* env,
509       jclass klass ATTRIBUTE_UNUSED,
510       jvmtiHeapObjectFilter object_filter ATTRIBUTE_UNUSED,
511       jvmtiHeapObjectCallback heap_object_callback ATTRIBUTE_UNUSED,
512       const void* user_data ATTRIBUTE_UNUSED) {
513     ENSURE_VALID_ENV(env);
514     ENSURE_HAS_CAP(env, can_tag_objects);
515     return ERR(NOT_IMPLEMENTED);
516   }
517 
GetLocalObject(jvmtiEnv * env,jthread thread,jint depth,jint slot,jobject * value_ptr)518   static jvmtiError GetLocalObject(jvmtiEnv* env,
519                                    jthread thread,
520                                    jint depth,
521                                    jint slot,
522                                    jobject* value_ptr) {
523     ENSURE_VALID_ENV(env);
524     ENSURE_HAS_CAP(env, can_access_local_variables);
525     return MethodUtil::GetLocalVariable(env, thread, depth, slot, value_ptr);
526   }
527 
GetLocalInstance(jvmtiEnv * env,jthread thread,jint depth,jobject * value_ptr)528   static jvmtiError GetLocalInstance(jvmtiEnv* env,
529                                      jthread thread,
530                                      jint depth,
531                                      jobject* value_ptr) {
532     ENSURE_VALID_ENV(env);
533     ENSURE_HAS_CAP(env, can_access_local_variables);
534     return MethodUtil::GetLocalInstance(env, thread, depth, value_ptr);
535   }
536 
GetLocalInt(jvmtiEnv * env,jthread thread,jint depth,jint slot,jint * value_ptr)537   static jvmtiError GetLocalInt(jvmtiEnv* env,
538                                 jthread thread,
539                                 jint depth,
540                                 jint slot,
541                                 jint* value_ptr) {
542     ENSURE_VALID_ENV(env);
543     ENSURE_HAS_CAP(env, can_access_local_variables);
544     return MethodUtil::GetLocalVariable(env, thread, depth, slot, value_ptr);
545   }
546 
GetLocalLong(jvmtiEnv * env,jthread thread,jint depth,jint slot,jlong * value_ptr)547   static jvmtiError GetLocalLong(jvmtiEnv* env,
548                                  jthread thread,
549                                  jint depth,
550                                  jint slot,
551                                  jlong* value_ptr) {
552     ENSURE_VALID_ENV(env);
553     ENSURE_HAS_CAP(env, can_access_local_variables);
554     return MethodUtil::GetLocalVariable(env, thread, depth, slot, value_ptr);
555   }
556 
GetLocalFloat(jvmtiEnv * env,jthread thread,jint depth,jint slot,jfloat * value_ptr)557   static jvmtiError GetLocalFloat(jvmtiEnv* env,
558                                   jthread thread,
559                                   jint depth,
560                                   jint slot,
561                                   jfloat* value_ptr) {
562     ENSURE_VALID_ENV(env);
563     ENSURE_HAS_CAP(env, can_access_local_variables);
564     return MethodUtil::GetLocalVariable(env, thread, depth, slot, value_ptr);
565   }
566 
GetLocalDouble(jvmtiEnv * env,jthread thread,jint depth,jint slot,jdouble * value_ptr)567   static jvmtiError GetLocalDouble(jvmtiEnv* env,
568                                    jthread thread,
569                                    jint depth,
570                                    jint slot,
571                                    jdouble* value_ptr) {
572     ENSURE_VALID_ENV(env);
573     ENSURE_HAS_CAP(env, can_access_local_variables);
574     return MethodUtil::GetLocalVariable(env, thread, depth, slot, value_ptr);
575   }
576 
SetLocalObject(jvmtiEnv * env,jthread thread,jint depth,jint slot,jobject value)577   static jvmtiError SetLocalObject(jvmtiEnv* env,
578                                    jthread thread,
579                                    jint depth,
580                                    jint slot,
581                                    jobject value) {
582     ENSURE_VALID_ENV(env);
583     ENSURE_HAS_CAP(env, can_access_local_variables);
584     return MethodUtil::SetLocalVariable(env, thread, depth, slot, value);
585   }
586 
SetLocalInt(jvmtiEnv * env,jthread thread,jint depth,jint slot,jint value)587   static jvmtiError SetLocalInt(jvmtiEnv* env,
588                                 jthread thread,
589                                 jint depth,
590                                 jint slot,
591                                 jint value) {
592     ENSURE_VALID_ENV(env);
593     ENSURE_HAS_CAP(env, can_access_local_variables);
594     return MethodUtil::SetLocalVariable(env, thread, depth, slot, value);
595   }
596 
SetLocalLong(jvmtiEnv * env,jthread thread,jint depth,jint slot,jlong value)597   static jvmtiError SetLocalLong(jvmtiEnv* env,
598                                  jthread thread,
599                                  jint depth,
600                                  jint slot,
601                                  jlong value) {
602     ENSURE_VALID_ENV(env);
603     ENSURE_HAS_CAP(env, can_access_local_variables);
604     return MethodUtil::SetLocalVariable(env, thread, depth, slot, value);
605   }
606 
SetLocalFloat(jvmtiEnv * env,jthread thread,jint depth,jint slot,jfloat value)607   static jvmtiError SetLocalFloat(jvmtiEnv* env,
608                                   jthread thread,
609                                   jint depth,
610                                   jint slot,
611                                   jfloat value) {
612     ENSURE_VALID_ENV(env);
613     ENSURE_HAS_CAP(env, can_access_local_variables);
614     return MethodUtil::SetLocalVariable(env, thread, depth, slot, value);
615   }
616 
SetLocalDouble(jvmtiEnv * env,jthread thread,jint depth,jint slot,jdouble value)617   static jvmtiError SetLocalDouble(jvmtiEnv* env,
618                                    jthread thread,
619                                    jint depth,
620                                    jint slot,
621                                    jdouble value) {
622     ENSURE_VALID_ENV(env);
623     ENSURE_HAS_CAP(env, can_access_local_variables);
624     return MethodUtil::SetLocalVariable(env, thread, depth, slot, value);
625   }
626 
627 
SetBreakpoint(jvmtiEnv * env,jmethodID method,jlocation location)628   static jvmtiError SetBreakpoint(jvmtiEnv* env, jmethodID method, jlocation location) {
629     ENSURE_VALID_ENV(env);
630     ENSURE_HAS_CAP(env, can_generate_breakpoint_events);
631     return BreakpointUtil::SetBreakpoint(env, method, location);
632   }
633 
ClearBreakpoint(jvmtiEnv * env,jmethodID method,jlocation location)634   static jvmtiError ClearBreakpoint(jvmtiEnv* env, jmethodID method, jlocation location) {
635     ENSURE_VALID_ENV(env);
636     ENSURE_HAS_CAP(env, can_generate_breakpoint_events);
637     return BreakpointUtil::ClearBreakpoint(env, method, location);
638   }
639 
SetFieldAccessWatch(jvmtiEnv * env,jclass klass,jfieldID field)640   static jvmtiError SetFieldAccessWatch(jvmtiEnv* env, jclass klass, jfieldID field) {
641     ENSURE_VALID_ENV(env);
642     ENSURE_HAS_CAP(env, can_generate_field_access_events);
643     return FieldUtil::SetFieldAccessWatch(env, klass, field);
644   }
645 
ClearFieldAccessWatch(jvmtiEnv * env,jclass klass,jfieldID field)646   static jvmtiError ClearFieldAccessWatch(jvmtiEnv* env, jclass klass, jfieldID field) {
647     ENSURE_VALID_ENV(env);
648     ENSURE_HAS_CAP(env, can_generate_field_access_events);
649     return FieldUtil::ClearFieldAccessWatch(env, klass, field);
650   }
651 
SetFieldModificationWatch(jvmtiEnv * env,jclass klass,jfieldID field)652   static jvmtiError SetFieldModificationWatch(jvmtiEnv* env, jclass klass, jfieldID field) {
653     ENSURE_VALID_ENV(env);
654     ENSURE_HAS_CAP(env, can_generate_field_modification_events);
655     return FieldUtil::SetFieldModificationWatch(env, klass, field);
656   }
657 
ClearFieldModificationWatch(jvmtiEnv * env,jclass klass,jfieldID field)658   static jvmtiError ClearFieldModificationWatch(jvmtiEnv* env, jclass klass, jfieldID field) {
659     ENSURE_VALID_ENV(env);
660     ENSURE_HAS_CAP(env, can_generate_field_modification_events);
661     return FieldUtil::ClearFieldModificationWatch(env, klass, field);
662   }
663 
GetLoadedClasses(jvmtiEnv * env,jint * class_count_ptr,jclass ** classes_ptr)664   static jvmtiError GetLoadedClasses(jvmtiEnv* env, jint* class_count_ptr, jclass** classes_ptr) {
665     ENSURE_VALID_ENV(env);
666     HeapUtil heap_util(ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table.get());
667     return heap_util.GetLoadedClasses(env, class_count_ptr, classes_ptr);
668   }
669 
GetClassLoaderClasses(jvmtiEnv * env,jobject initiating_loader,jint * class_count_ptr,jclass ** classes_ptr)670   static jvmtiError GetClassLoaderClasses(jvmtiEnv* env,
671                                           jobject initiating_loader,
672                                           jint* class_count_ptr,
673                                           jclass** classes_ptr) {
674     ENSURE_VALID_ENV(env);
675     return ClassUtil::GetClassLoaderClasses(env, initiating_loader, class_count_ptr, classes_ptr);
676   }
677 
GetClassSignature(jvmtiEnv * env,jclass klass,char ** signature_ptr,char ** generic_ptr)678   static jvmtiError GetClassSignature(jvmtiEnv* env,
679                                       jclass klass,
680                                       char** signature_ptr,
681                                       char** generic_ptr) {
682     ENSURE_VALID_ENV(env);
683     return ClassUtil::GetClassSignature(env, klass, signature_ptr, generic_ptr);
684   }
685 
GetClassStatus(jvmtiEnv * env,jclass klass,jint * status_ptr)686   static jvmtiError GetClassStatus(jvmtiEnv* env, jclass klass, jint* status_ptr) {
687     ENSURE_VALID_ENV(env);
688     return ClassUtil::GetClassStatus(env, klass, status_ptr);
689   }
690 
GetSourceFileName(jvmtiEnv * env,jclass klass,char ** source_name_ptr)691   static jvmtiError GetSourceFileName(jvmtiEnv* env, jclass klass, char** source_name_ptr) {
692     ENSURE_VALID_ENV(env);
693     ENSURE_HAS_CAP(env, can_get_source_file_name);
694     return ClassUtil::GetSourceFileName(env, klass, source_name_ptr);
695   }
696 
GetClassModifiers(jvmtiEnv * env,jclass klass,jint * modifiers_ptr)697   static jvmtiError GetClassModifiers(jvmtiEnv* env, jclass klass, jint* modifiers_ptr) {
698     ENSURE_VALID_ENV(env);
699     return ClassUtil::GetClassModifiers(env, klass, modifiers_ptr);
700   }
701 
GetClassMethods(jvmtiEnv * env,jclass klass,jint * method_count_ptr,jmethodID ** methods_ptr)702   static jvmtiError GetClassMethods(jvmtiEnv* env,
703                                     jclass klass,
704                                     jint* method_count_ptr,
705                                     jmethodID** methods_ptr) {
706     ENSURE_VALID_ENV(env);
707     return ClassUtil::GetClassMethods(env, klass, method_count_ptr, methods_ptr);
708   }
709 
GetClassFields(jvmtiEnv * env,jclass klass,jint * field_count_ptr,jfieldID ** fields_ptr)710   static jvmtiError GetClassFields(jvmtiEnv* env,
711                                    jclass klass,
712                                    jint* field_count_ptr,
713                                    jfieldID** fields_ptr) {
714     ENSURE_VALID_ENV(env);
715     return ClassUtil::GetClassFields(env, klass, field_count_ptr, fields_ptr);
716   }
717 
GetImplementedInterfaces(jvmtiEnv * env,jclass klass,jint * interface_count_ptr,jclass ** interfaces_ptr)718   static jvmtiError GetImplementedInterfaces(jvmtiEnv* env,
719                                              jclass klass,
720                                              jint* interface_count_ptr,
721                                              jclass** interfaces_ptr) {
722     ENSURE_VALID_ENV(env);
723     return ClassUtil::GetImplementedInterfaces(env, klass, interface_count_ptr, interfaces_ptr);
724   }
725 
GetClassVersionNumbers(jvmtiEnv * env,jclass klass,jint * minor_version_ptr,jint * major_version_ptr)726   static jvmtiError GetClassVersionNumbers(jvmtiEnv* env,
727                                            jclass klass,
728                                            jint* minor_version_ptr,
729                                            jint* major_version_ptr) {
730     ENSURE_VALID_ENV(env);
731     return ClassUtil::GetClassVersionNumbers(env, klass, minor_version_ptr, major_version_ptr);
732   }
733 
GetConstantPool(jvmtiEnv * env,jclass klass ATTRIBUTE_UNUSED,jint * constant_pool_count_ptr ATTRIBUTE_UNUSED,jint * constant_pool_byte_count_ptr ATTRIBUTE_UNUSED,unsigned char ** constant_pool_bytes_ptr ATTRIBUTE_UNUSED)734   static jvmtiError GetConstantPool(jvmtiEnv* env,
735                                     jclass klass ATTRIBUTE_UNUSED,
736                                     jint* constant_pool_count_ptr ATTRIBUTE_UNUSED,
737                                     jint* constant_pool_byte_count_ptr ATTRIBUTE_UNUSED,
738                                     unsigned char** constant_pool_bytes_ptr ATTRIBUTE_UNUSED) {
739     ENSURE_VALID_ENV(env);
740     ENSURE_HAS_CAP(env, can_get_constant_pool);
741     return ERR(NOT_IMPLEMENTED);
742   }
743 
IsInterface(jvmtiEnv * env,jclass klass,jboolean * is_interface_ptr)744   static jvmtiError IsInterface(jvmtiEnv* env, jclass klass, jboolean* is_interface_ptr) {
745     ENSURE_VALID_ENV(env);
746     return ClassUtil::IsInterface(env, klass, is_interface_ptr);
747   }
748 
IsArrayClass(jvmtiEnv * env,jclass klass,jboolean * is_array_class_ptr)749   static jvmtiError IsArrayClass(jvmtiEnv* env,
750                                  jclass klass,
751                                  jboolean* is_array_class_ptr) {
752     ENSURE_VALID_ENV(env);
753     return ClassUtil::IsArrayClass(env, klass, is_array_class_ptr);
754   }
755 
IsModifiableClass(jvmtiEnv * env,jclass klass,jboolean * is_modifiable_class_ptr)756   static jvmtiError IsModifiableClass(jvmtiEnv* env,
757                                       jclass klass,
758                                       jboolean* is_modifiable_class_ptr) {
759     ENSURE_VALID_ENV(env);
760     return Redefiner::IsModifiableClass(env, klass, is_modifiable_class_ptr);
761   }
762 
GetClassLoader(jvmtiEnv * env,jclass klass,jobject * classloader_ptr)763   static jvmtiError GetClassLoader(jvmtiEnv* env, jclass klass, jobject* classloader_ptr) {
764     ENSURE_VALID_ENV(env);
765     return ClassUtil::GetClassLoader(env, klass, classloader_ptr);
766   }
767 
GetSourceDebugExtension(jvmtiEnv * env,jclass klass,char ** source_debug_extension_ptr)768   static jvmtiError GetSourceDebugExtension(jvmtiEnv* env,
769                                             jclass klass,
770                                             char** source_debug_extension_ptr) {
771     ENSURE_VALID_ENV(env);
772     ENSURE_HAS_CAP(env, can_get_source_debug_extension);
773     return ClassUtil::GetSourceDebugExtension(env, klass, source_debug_extension_ptr);
774   }
775 
RetransformClasses(jvmtiEnv * env,jint class_count,const jclass * classes)776   static jvmtiError RetransformClasses(jvmtiEnv* env, jint class_count, const jclass* classes) {
777     ENSURE_VALID_ENV(env);
778     ENSURE_HAS_CAP(env, can_retransform_classes);
779     std::string error_msg;
780     jvmtiError res = Transformer::RetransformClasses(ArtJvmTiEnv::AsArtJvmTiEnv(env),
781                                                      gEventHandler,
782                                                      art::Runtime::Current(),
783                                                      art::Thread::Current(),
784                                                      class_count,
785                                                      classes,
786                                                      &error_msg);
787     if (res != OK) {
788       LOG(WARNING) << "FAILURE TO RETRANFORM " << error_msg;
789     }
790     return res;
791   }
792 
RedefineClasses(jvmtiEnv * env,jint class_count,const jvmtiClassDefinition * class_definitions)793   static jvmtiError RedefineClasses(jvmtiEnv* env,
794                                     jint class_count,
795                                     const jvmtiClassDefinition* class_definitions) {
796     ENSURE_VALID_ENV(env);
797     ENSURE_HAS_CAP(env, can_redefine_classes);
798     std::string error_msg;
799     jvmtiError res = Redefiner::RedefineClasses(ArtJvmTiEnv::AsArtJvmTiEnv(env),
800                                                 gEventHandler,
801                                                 art::Runtime::Current(),
802                                                 art::Thread::Current(),
803                                                 class_count,
804                                                 class_definitions,
805                                                 &error_msg);
806     if (res != OK) {
807       LOG(WARNING) << "FAILURE TO REDEFINE " << error_msg;
808     }
809     return res;
810   }
811 
GetObjectSize(jvmtiEnv * env,jobject object,jlong * size_ptr)812   static jvmtiError GetObjectSize(jvmtiEnv* env, jobject object, jlong* size_ptr) {
813     ENSURE_VALID_ENV(env);
814     return ObjectUtil::GetObjectSize(env, object, size_ptr);
815   }
816 
GetObjectHashCode(jvmtiEnv * env,jobject object,jint * hash_code_ptr)817   static jvmtiError GetObjectHashCode(jvmtiEnv* env, jobject object, jint* hash_code_ptr) {
818     ENSURE_VALID_ENV(env);
819     return ObjectUtil::GetObjectHashCode(env, object, hash_code_ptr);
820   }
821 
GetObjectMonitorUsage(jvmtiEnv * env,jobject object,jvmtiMonitorUsage * info_ptr)822   static jvmtiError GetObjectMonitorUsage(jvmtiEnv* env,
823                                           jobject object,
824                                           jvmtiMonitorUsage* info_ptr) {
825     ENSURE_VALID_ENV(env);
826     ENSURE_HAS_CAP(env, can_get_monitor_info);
827     return ObjectUtil::GetObjectMonitorUsage(env, object, info_ptr);
828   }
829 
GetFieldName(jvmtiEnv * env,jclass klass,jfieldID field,char ** name_ptr,char ** signature_ptr,char ** generic_ptr)830   static jvmtiError GetFieldName(jvmtiEnv* env,
831                                  jclass klass,
832                                  jfieldID field,
833                                  char** name_ptr,
834                                  char** signature_ptr,
835                                  char** generic_ptr) {
836     ENSURE_VALID_ENV(env);
837     return FieldUtil::GetFieldName(env, klass, field, name_ptr, signature_ptr, generic_ptr);
838   }
839 
GetFieldDeclaringClass(jvmtiEnv * env,jclass klass,jfieldID field,jclass * declaring_class_ptr)840   static jvmtiError GetFieldDeclaringClass(jvmtiEnv* env,
841                                            jclass klass,
842                                            jfieldID field,
843                                            jclass* declaring_class_ptr) {
844     ENSURE_VALID_ENV(env);
845     return FieldUtil::GetFieldDeclaringClass(env, klass, field, declaring_class_ptr);
846   }
847 
GetFieldModifiers(jvmtiEnv * env,jclass klass,jfieldID field,jint * modifiers_ptr)848   static jvmtiError GetFieldModifiers(jvmtiEnv* env,
849                                       jclass klass,
850                                       jfieldID field,
851                                       jint* modifiers_ptr) {
852     ENSURE_VALID_ENV(env);
853     return FieldUtil::GetFieldModifiers(env, klass, field, modifiers_ptr);
854   }
855 
IsFieldSynthetic(jvmtiEnv * env,jclass klass,jfieldID field,jboolean * is_synthetic_ptr)856   static jvmtiError IsFieldSynthetic(jvmtiEnv* env,
857                                      jclass klass,
858                                      jfieldID field,
859                                      jboolean* is_synthetic_ptr) {
860     ENSURE_VALID_ENV(env);
861     ENSURE_HAS_CAP(env, can_get_synthetic_attribute);
862     return FieldUtil::IsFieldSynthetic(env, klass, field, is_synthetic_ptr);
863   }
864 
GetMethodName(jvmtiEnv * env,jmethodID method,char ** name_ptr,char ** signature_ptr,char ** generic_ptr)865   static jvmtiError GetMethodName(jvmtiEnv* env,
866                                   jmethodID method,
867                                   char** name_ptr,
868                                   char** signature_ptr,
869                                   char** generic_ptr) {
870     ENSURE_VALID_ENV(env);
871     return MethodUtil::GetMethodName(env, method, name_ptr, signature_ptr, generic_ptr);
872   }
873 
GetMethodDeclaringClass(jvmtiEnv * env,jmethodID method,jclass * declaring_class_ptr)874   static jvmtiError GetMethodDeclaringClass(jvmtiEnv* env,
875                                             jmethodID method,
876                                             jclass* declaring_class_ptr) {
877     ENSURE_VALID_ENV(env);
878     return MethodUtil::GetMethodDeclaringClass(env, method, declaring_class_ptr);
879   }
880 
GetMethodModifiers(jvmtiEnv * env,jmethodID method,jint * modifiers_ptr)881   static jvmtiError GetMethodModifiers(jvmtiEnv* env,
882                                        jmethodID method,
883                                        jint* modifiers_ptr) {
884     ENSURE_VALID_ENV(env);
885     return MethodUtil::GetMethodModifiers(env, method, modifiers_ptr);
886   }
887 
GetMaxLocals(jvmtiEnv * env,jmethodID method,jint * max_ptr)888   static jvmtiError GetMaxLocals(jvmtiEnv* env,
889                                  jmethodID method,
890                                  jint* max_ptr) {
891     ENSURE_VALID_ENV(env);
892     return MethodUtil::GetMaxLocals(env, method, max_ptr);
893   }
894 
GetArgumentsSize(jvmtiEnv * env,jmethodID method,jint * size_ptr)895   static jvmtiError GetArgumentsSize(jvmtiEnv* env,
896                                      jmethodID method,
897                                      jint* size_ptr) {
898     ENSURE_VALID_ENV(env);
899     return MethodUtil::GetArgumentsSize(env, method, size_ptr);
900   }
901 
GetLineNumberTable(jvmtiEnv * env,jmethodID method,jint * entry_count_ptr,jvmtiLineNumberEntry ** table_ptr)902   static jvmtiError GetLineNumberTable(jvmtiEnv* env,
903                                        jmethodID method,
904                                        jint* entry_count_ptr,
905                                        jvmtiLineNumberEntry** table_ptr) {
906     ENSURE_VALID_ENV(env);
907     ENSURE_HAS_CAP(env, can_get_line_numbers);
908     return MethodUtil::GetLineNumberTable(env, method, entry_count_ptr, table_ptr);
909   }
910 
GetMethodLocation(jvmtiEnv * env,jmethodID method,jlocation * start_location_ptr,jlocation * end_location_ptr)911   static jvmtiError GetMethodLocation(jvmtiEnv* env,
912                                       jmethodID method,
913                                       jlocation* start_location_ptr,
914                                       jlocation* end_location_ptr) {
915     ENSURE_VALID_ENV(env);
916     return MethodUtil::GetMethodLocation(env, method, start_location_ptr, end_location_ptr);
917   }
918 
GetLocalVariableTable(jvmtiEnv * env,jmethodID method,jint * entry_count_ptr,jvmtiLocalVariableEntry ** table_ptr)919   static jvmtiError GetLocalVariableTable(jvmtiEnv* env,
920                                           jmethodID method,
921                                           jint* entry_count_ptr,
922                                           jvmtiLocalVariableEntry** table_ptr) {
923     ENSURE_VALID_ENV(env);
924     ENSURE_HAS_CAP(env, can_access_local_variables);
925     return MethodUtil::GetLocalVariableTable(env, method, entry_count_ptr, table_ptr);
926   }
927 
GetBytecodes(jvmtiEnv * env,jmethodID method,jint * bytecode_count_ptr,unsigned char ** bytecodes_ptr)928   static jvmtiError GetBytecodes(jvmtiEnv* env,
929                                  jmethodID method,
930                                  jint* bytecode_count_ptr,
931                                  unsigned char** bytecodes_ptr) {
932     ENSURE_VALID_ENV(env);
933     ENSURE_HAS_CAP(env, can_get_bytecodes);
934     return MethodUtil::GetBytecodes(env, method, bytecode_count_ptr, bytecodes_ptr);
935   }
936 
IsMethodNative(jvmtiEnv * env,jmethodID method,jboolean * is_native_ptr)937   static jvmtiError IsMethodNative(jvmtiEnv* env, jmethodID method, jboolean* is_native_ptr) {
938     ENSURE_VALID_ENV(env);
939     return MethodUtil::IsMethodNative(env, method, is_native_ptr);
940   }
941 
IsMethodSynthetic(jvmtiEnv * env,jmethodID method,jboolean * is_synthetic_ptr)942   static jvmtiError IsMethodSynthetic(jvmtiEnv* env, jmethodID method, jboolean* is_synthetic_ptr) {
943     ENSURE_VALID_ENV(env);
944     ENSURE_HAS_CAP(env, can_get_synthetic_attribute);
945     return MethodUtil::IsMethodSynthetic(env, method, is_synthetic_ptr);
946   }
947 
IsMethodObsolete(jvmtiEnv * env,jmethodID method,jboolean * is_obsolete_ptr)948   static jvmtiError IsMethodObsolete(jvmtiEnv* env, jmethodID method, jboolean* is_obsolete_ptr) {
949     ENSURE_VALID_ENV(env);
950     return MethodUtil::IsMethodObsolete(env, method, is_obsolete_ptr);
951   }
952 
SetNativeMethodPrefix(jvmtiEnv * env,const char * prefix ATTRIBUTE_UNUSED)953   static jvmtiError SetNativeMethodPrefix(jvmtiEnv* env, const char* prefix ATTRIBUTE_UNUSED) {
954     ENSURE_VALID_ENV(env);
955     ENSURE_HAS_CAP(env, can_set_native_method_prefix);
956     return ERR(NOT_IMPLEMENTED);
957   }
958 
SetNativeMethodPrefixes(jvmtiEnv * env,jint prefix_count ATTRIBUTE_UNUSED,char ** prefixes ATTRIBUTE_UNUSED)959   static jvmtiError SetNativeMethodPrefixes(jvmtiEnv* env,
960                                             jint prefix_count ATTRIBUTE_UNUSED,
961                                             char** prefixes ATTRIBUTE_UNUSED) {
962     ENSURE_VALID_ENV(env);
963     ENSURE_HAS_CAP(env, can_set_native_method_prefix);
964     return ERR(NOT_IMPLEMENTED);
965   }
966 
CreateRawMonitor(jvmtiEnv * env,const char * name,jrawMonitorID * monitor_ptr)967   static jvmtiError CreateRawMonitor(jvmtiEnv* env, const char* name, jrawMonitorID* monitor_ptr) {
968     ENSURE_VALID_ENV(env);
969     return MonitorUtil::CreateRawMonitor(env, name, monitor_ptr);
970   }
971 
DestroyRawMonitor(jvmtiEnv * env,jrawMonitorID monitor)972   static jvmtiError DestroyRawMonitor(jvmtiEnv* env, jrawMonitorID monitor) {
973     ENSURE_VALID_ENV(env);
974     return MonitorUtil::DestroyRawMonitor(env, monitor);
975   }
976 
RawMonitorEnter(jvmtiEnv * env,jrawMonitorID monitor)977   static jvmtiError RawMonitorEnter(jvmtiEnv* env, jrawMonitorID monitor) {
978     ENSURE_VALID_ENV(env);
979     return MonitorUtil::RawMonitorEnter(env, monitor);
980   }
981 
RawMonitorExit(jvmtiEnv * env,jrawMonitorID monitor)982   static jvmtiError RawMonitorExit(jvmtiEnv* env, jrawMonitorID monitor) {
983     ENSURE_VALID_ENV(env);
984     return MonitorUtil::RawMonitorExit(env, monitor);
985   }
986 
RawMonitorWait(jvmtiEnv * env,jrawMonitorID monitor,jlong millis)987   static jvmtiError RawMonitorWait(jvmtiEnv* env, jrawMonitorID monitor, jlong millis) {
988     ENSURE_VALID_ENV(env);
989     return MonitorUtil::RawMonitorWait(env, monitor, millis);
990   }
991 
RawMonitorNotify(jvmtiEnv * env,jrawMonitorID monitor)992   static jvmtiError RawMonitorNotify(jvmtiEnv* env, jrawMonitorID monitor) {
993     ENSURE_VALID_ENV(env);
994     return MonitorUtil::RawMonitorNotify(env, monitor);
995   }
996 
RawMonitorNotifyAll(jvmtiEnv * env,jrawMonitorID monitor)997   static jvmtiError RawMonitorNotifyAll(jvmtiEnv* env, jrawMonitorID monitor) {
998     ENSURE_VALID_ENV(env);
999     return MonitorUtil::RawMonitorNotifyAll(env, monitor);
1000   }
1001 
SetJNIFunctionTable(jvmtiEnv * env,const jniNativeInterface * function_table)1002   static jvmtiError SetJNIFunctionTable(jvmtiEnv* env, const jniNativeInterface* function_table) {
1003     ENSURE_VALID_ENV(env);
1004     return JNIUtil::SetJNIFunctionTable(env, function_table);
1005   }
1006 
GetJNIFunctionTable(jvmtiEnv * env,jniNativeInterface ** function_table)1007   static jvmtiError GetJNIFunctionTable(jvmtiEnv* env, jniNativeInterface** function_table) {
1008     ENSURE_VALID_ENV(env);
1009     return JNIUtil::GetJNIFunctionTable(env, function_table);
1010   }
1011 
1012   // TODO: This will require locking, so that an agent can't remove callbacks when we're dispatching
1013   //       an event.
SetEventCallbacks(jvmtiEnv * env,const jvmtiEventCallbacks * callbacks,jint size_of_callbacks)1014   static jvmtiError SetEventCallbacks(jvmtiEnv* env,
1015                                       const jvmtiEventCallbacks* callbacks,
1016                                       jint size_of_callbacks) {
1017     ENSURE_VALID_ENV(env);
1018     if (size_of_callbacks < 0) {
1019       return ERR(ILLEGAL_ARGUMENT);
1020     }
1021 
1022     if (callbacks == nullptr) {
1023       ArtJvmTiEnv::AsArtJvmTiEnv(env)->event_callbacks.reset();
1024       return ERR(NONE);
1025     }
1026 
1027     // Lock the event_info_mutex_ while we replace the callbacks.
1028     ArtJvmTiEnv* art_env = ArtJvmTiEnv::AsArtJvmTiEnv(env);
1029     art::WriterMutexLock lk(art::Thread::Current(), art_env->event_info_mutex_);
1030     std::unique_ptr<ArtJvmtiEventCallbacks> tmp(new ArtJvmtiEventCallbacks());
1031     // Copy over the extension events.
1032     tmp->CopyExtensionsFrom(art_env->event_callbacks.get());
1033     // Never overwrite the extension events.
1034     size_t copy_size = std::min(sizeof(jvmtiEventCallbacks),
1035                                 static_cast<size_t>(size_of_callbacks));
1036     copy_size = art::RoundDown(copy_size, sizeof(void*));
1037     // Copy non-extension events.
1038     memcpy(tmp.get(), callbacks, copy_size);
1039 
1040     // replace the event table.
1041     art_env->event_callbacks = std::move(tmp);
1042 
1043     return ERR(NONE);
1044   }
1045 
SetEventNotificationMode(jvmtiEnv * env,jvmtiEventMode mode,jvmtiEvent event_type,jthread event_thread,...)1046   static jvmtiError SetEventNotificationMode(jvmtiEnv* env,
1047                                              jvmtiEventMode mode,
1048                                              jvmtiEvent event_type,
1049                                              jthread event_thread,
1050                                              ...) {
1051     ENSURE_VALID_ENV(env);
1052     art::Thread* art_thread = nullptr;
1053     if (event_thread != nullptr) {
1054       // TODO The locking around this call is less then what we really want.
1055       art::ScopedObjectAccess soa(art::Thread::Current());
1056       art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_);
1057       jvmtiError err = ERR(INTERNAL);
1058       if (!ThreadUtil::GetAliveNativeThread(event_thread, soa, &art_thread, &err)) {
1059         return err;
1060       } else if (art_thread->IsStillStarting()) {
1061         return ERR(THREAD_NOT_ALIVE);
1062       }
1063     }
1064 
1065     ArtJvmTiEnv* art_env = ArtJvmTiEnv::AsArtJvmTiEnv(env);
1066     return gEventHandler->SetEvent(art_env,
1067                                    art_thread,
1068                                    GetArtJvmtiEvent(art_env, event_type),
1069                                    mode);
1070   }
1071 
GenerateEvents(jvmtiEnv * env,jvmtiEvent event_type ATTRIBUTE_UNUSED)1072   static jvmtiError GenerateEvents(jvmtiEnv* env,
1073                                    jvmtiEvent event_type ATTRIBUTE_UNUSED) {
1074     ENSURE_VALID_ENV(env);
1075     return OK;
1076   }
1077 
GetExtensionFunctions(jvmtiEnv * env,jint * extension_count_ptr,jvmtiExtensionFunctionInfo ** extensions)1078   static jvmtiError GetExtensionFunctions(jvmtiEnv* env,
1079                                           jint* extension_count_ptr,
1080                                           jvmtiExtensionFunctionInfo** extensions) {
1081     ENSURE_VALID_ENV(env);
1082     ENSURE_NON_NULL(extension_count_ptr);
1083     ENSURE_NON_NULL(extensions);
1084     return ExtensionUtil::GetExtensionFunctions(env, extension_count_ptr, extensions);
1085   }
1086 
GetExtensionEvents(jvmtiEnv * env,jint * extension_count_ptr,jvmtiExtensionEventInfo ** extensions)1087   static jvmtiError GetExtensionEvents(jvmtiEnv* env,
1088                                        jint* extension_count_ptr,
1089                                        jvmtiExtensionEventInfo** extensions) {
1090     ENSURE_VALID_ENV(env);
1091     ENSURE_NON_NULL(extension_count_ptr);
1092     ENSURE_NON_NULL(extensions);
1093     return ExtensionUtil::GetExtensionEvents(env, extension_count_ptr, extensions);
1094   }
1095 
SetExtensionEventCallback(jvmtiEnv * env,jint extension_event_index,jvmtiExtensionEvent callback)1096   static jvmtiError SetExtensionEventCallback(jvmtiEnv* env,
1097                                               jint extension_event_index,
1098                                               jvmtiExtensionEvent callback) {
1099     ENSURE_VALID_ENV(env);
1100     return ExtensionUtil::SetExtensionEventCallback(env,
1101                                                     extension_event_index,
1102                                                     callback,
1103                                                     gEventHandler);
1104   }
1105 
1106 #define FOR_ALL_CAPABILITIES(FUN)                        \
1107     FUN(can_tag_objects)                                 \
1108     FUN(can_generate_field_modification_events)          \
1109     FUN(can_generate_field_access_events)                \
1110     FUN(can_get_bytecodes)                               \
1111     FUN(can_get_synthetic_attribute)                     \
1112     FUN(can_get_owned_monitor_info)                      \
1113     FUN(can_get_current_contended_monitor)               \
1114     FUN(can_get_monitor_info)                            \
1115     FUN(can_pop_frame)                                   \
1116     FUN(can_redefine_classes)                            \
1117     FUN(can_signal_thread)                               \
1118     FUN(can_get_source_file_name)                        \
1119     FUN(can_get_line_numbers)                            \
1120     FUN(can_get_source_debug_extension)                  \
1121     FUN(can_access_local_variables)                      \
1122     FUN(can_maintain_original_method_order)              \
1123     FUN(can_generate_single_step_events)                 \
1124     FUN(can_generate_exception_events)                   \
1125     FUN(can_generate_frame_pop_events)                   \
1126     FUN(can_generate_breakpoint_events)                  \
1127     FUN(can_suspend)                                     \
1128     FUN(can_redefine_any_class)                          \
1129     FUN(can_get_current_thread_cpu_time)                 \
1130     FUN(can_get_thread_cpu_time)                         \
1131     FUN(can_generate_method_entry_events)                \
1132     FUN(can_generate_method_exit_events)                 \
1133     FUN(can_generate_all_class_hook_events)              \
1134     FUN(can_generate_compiled_method_load_events)        \
1135     FUN(can_generate_monitor_events)                     \
1136     FUN(can_generate_vm_object_alloc_events)             \
1137     FUN(can_generate_native_method_bind_events)          \
1138     FUN(can_generate_garbage_collection_events)          \
1139     FUN(can_generate_object_free_events)                 \
1140     FUN(can_force_early_return)                          \
1141     FUN(can_get_owned_monitor_stack_depth_info)          \
1142     FUN(can_get_constant_pool)                           \
1143     FUN(can_set_native_method_prefix)                    \
1144     FUN(can_retransform_classes)                         \
1145     FUN(can_retransform_any_class)                       \
1146     FUN(can_generate_resource_exhaustion_heap_events)    \
1147     FUN(can_generate_resource_exhaustion_threads_events)
1148 
GetPotentialCapabilities(jvmtiEnv * env,jvmtiCapabilities * capabilities_ptr)1149   static jvmtiError GetPotentialCapabilities(jvmtiEnv* env, jvmtiCapabilities* capabilities_ptr) {
1150     ENSURE_VALID_ENV(env);
1151     ENSURE_NON_NULL(capabilities_ptr);
1152     *capabilities_ptr = kPotentialCapabilities;
1153     if (UNLIKELY(!IsFullJvmtiAvailable())) {
1154 #define REMOVE_NONDEBUGGABLE_UNSUPPORTED(e)                 \
1155       do {                                                  \
1156         if (kNonDebuggableUnsupportedCapabilities.e == 1) { \
1157           capabilities_ptr->e = 0;                          \
1158         }                                                   \
1159       } while (false);
1160 
1161       FOR_ALL_CAPABILITIES(REMOVE_NONDEBUGGABLE_UNSUPPORTED);
1162 #undef REMOVE_NONDEBUGGABLE_UNSUPPORTED
1163     }
1164     return OK;
1165   }
1166 
AddCapabilities(jvmtiEnv * env,const jvmtiCapabilities * capabilities_ptr)1167   static jvmtiError AddCapabilities(jvmtiEnv* env, const jvmtiCapabilities* capabilities_ptr) {
1168     ENSURE_VALID_ENV(env);
1169     ENSURE_NON_NULL(capabilities_ptr);
1170     ArtJvmTiEnv* art_env = static_cast<ArtJvmTiEnv*>(env);
1171     jvmtiError ret = OK;
1172     jvmtiCapabilities changed = {};
1173     jvmtiCapabilities potential_capabilities = {};
1174     ret = env->GetPotentialCapabilities(&potential_capabilities);
1175     if (ret != OK) {
1176       return ret;
1177     }
1178 #define ADD_CAPABILITY(e) \
1179     do { \
1180       if (capabilities_ptr->e == 1) { \
1181         if (potential_capabilities.e == 1) { \
1182           if (art_env->capabilities.e != 1) { \
1183             art_env->capabilities.e = 1; \
1184             changed.e = 1; \
1185           }\
1186         } else { \
1187           ret = ERR(NOT_AVAILABLE); \
1188         } \
1189       } \
1190     } while (false);
1191 
1192     FOR_ALL_CAPABILITIES(ADD_CAPABILITY);
1193 #undef ADD_CAPABILITY
1194     gEventHandler->HandleChangedCapabilities(ArtJvmTiEnv::AsArtJvmTiEnv(env),
1195                                              changed,
1196                                              /*added*/true);
1197     return ret;
1198   }
1199 
RelinquishCapabilities(jvmtiEnv * env,const jvmtiCapabilities * capabilities_ptr)1200   static jvmtiError RelinquishCapabilities(jvmtiEnv* env,
1201                                            const jvmtiCapabilities* capabilities_ptr) {
1202     ENSURE_VALID_ENV(env);
1203     ENSURE_NON_NULL(capabilities_ptr);
1204     ArtJvmTiEnv* art_env = reinterpret_cast<ArtJvmTiEnv*>(env);
1205     jvmtiCapabilities changed = {};
1206 #define DEL_CAPABILITY(e) \
1207     do { \
1208       if (capabilities_ptr->e == 1) { \
1209         if (art_env->capabilities.e == 1) { \
1210           art_env->capabilities.e = 0;\
1211           changed.e = 1; \
1212         } \
1213       } \
1214     } while (false);
1215 
1216     FOR_ALL_CAPABILITIES(DEL_CAPABILITY);
1217 #undef DEL_CAPABILITY
1218     gEventHandler->HandleChangedCapabilities(ArtJvmTiEnv::AsArtJvmTiEnv(env),
1219                                              changed,
1220                                              /*added*/false);
1221     return OK;
1222   }
1223 
1224 #undef FOR_ALL_CAPABILITIES
1225 
GetCapabilities(jvmtiEnv * env,jvmtiCapabilities * capabilities_ptr)1226   static jvmtiError GetCapabilities(jvmtiEnv* env, jvmtiCapabilities* capabilities_ptr) {
1227     ENSURE_VALID_ENV(env);
1228     ENSURE_NON_NULL(capabilities_ptr);
1229     ArtJvmTiEnv* artenv = reinterpret_cast<ArtJvmTiEnv*>(env);
1230     *capabilities_ptr = artenv->capabilities;
1231     return OK;
1232   }
1233 
GetCurrentThreadCpuTimerInfo(jvmtiEnv * env,jvmtiTimerInfo * info_ptr ATTRIBUTE_UNUSED)1234   static jvmtiError GetCurrentThreadCpuTimerInfo(jvmtiEnv* env,
1235                                                  jvmtiTimerInfo* info_ptr ATTRIBUTE_UNUSED) {
1236     ENSURE_VALID_ENV(env);
1237     ENSURE_HAS_CAP(env, can_get_current_thread_cpu_time);
1238     return ERR(NOT_IMPLEMENTED);
1239   }
1240 
GetCurrentThreadCpuTime(jvmtiEnv * env,jlong * nanos_ptr ATTRIBUTE_UNUSED)1241   static jvmtiError GetCurrentThreadCpuTime(jvmtiEnv* env, jlong* nanos_ptr ATTRIBUTE_UNUSED) {
1242     ENSURE_VALID_ENV(env);
1243     ENSURE_HAS_CAP(env, can_get_current_thread_cpu_time);
1244     return ERR(NOT_IMPLEMENTED);
1245   }
1246 
GetThreadCpuTimerInfo(jvmtiEnv * env,jvmtiTimerInfo * info_ptr ATTRIBUTE_UNUSED)1247   static jvmtiError GetThreadCpuTimerInfo(jvmtiEnv* env,
1248                                           jvmtiTimerInfo* info_ptr ATTRIBUTE_UNUSED) {
1249     ENSURE_VALID_ENV(env);
1250     ENSURE_HAS_CAP(env, can_get_thread_cpu_time);
1251     return ERR(NOT_IMPLEMENTED);
1252   }
1253 
GetThreadCpuTime(jvmtiEnv * env,jthread thread ATTRIBUTE_UNUSED,jlong * nanos_ptr ATTRIBUTE_UNUSED)1254   static jvmtiError GetThreadCpuTime(jvmtiEnv* env,
1255                                      jthread thread ATTRIBUTE_UNUSED,
1256                                      jlong* nanos_ptr ATTRIBUTE_UNUSED) {
1257     ENSURE_VALID_ENV(env);
1258     ENSURE_HAS_CAP(env, can_get_thread_cpu_time);
1259     return ERR(NOT_IMPLEMENTED);
1260   }
1261 
GetTimerInfo(jvmtiEnv * env,jvmtiTimerInfo * info_ptr)1262   static jvmtiError GetTimerInfo(jvmtiEnv* env, jvmtiTimerInfo* info_ptr) {
1263     ENSURE_VALID_ENV(env);
1264     return TimerUtil::GetTimerInfo(env, info_ptr);
1265   }
1266 
GetTime(jvmtiEnv * env,jlong * nanos_ptr)1267   static jvmtiError GetTime(jvmtiEnv* env, jlong* nanos_ptr) {
1268     ENSURE_VALID_ENV(env);
1269     return TimerUtil::GetTime(env, nanos_ptr);
1270   }
1271 
GetAvailableProcessors(jvmtiEnv * env,jint * processor_count_ptr)1272   static jvmtiError GetAvailableProcessors(jvmtiEnv* env, jint* processor_count_ptr) {
1273     ENSURE_VALID_ENV(env);
1274     return TimerUtil::GetAvailableProcessors(env, processor_count_ptr);
1275   }
1276 
AddToBootstrapClassLoaderSearch(jvmtiEnv * env,const char * segment)1277   static jvmtiError AddToBootstrapClassLoaderSearch(jvmtiEnv* env, const char* segment) {
1278     ENSURE_VALID_ENV(env);
1279     return SearchUtil::AddToBootstrapClassLoaderSearch(env, segment);
1280   }
1281 
AddToSystemClassLoaderSearch(jvmtiEnv * env,const char * segment)1282   static jvmtiError AddToSystemClassLoaderSearch(jvmtiEnv* env, const char* segment) {
1283     ENSURE_VALID_ENV(env);
1284     return SearchUtil::AddToSystemClassLoaderSearch(env, segment);
1285   }
1286 
GetSystemProperties(jvmtiEnv * env,jint * count_ptr,char *** property_ptr)1287   static jvmtiError GetSystemProperties(jvmtiEnv* env, jint* count_ptr, char*** property_ptr) {
1288     ENSURE_VALID_ENV(env);
1289     return PropertiesUtil::GetSystemProperties(env, count_ptr, property_ptr);
1290   }
1291 
GetSystemProperty(jvmtiEnv * env,const char * property,char ** value_ptr)1292   static jvmtiError GetSystemProperty(jvmtiEnv* env, const char* property, char** value_ptr) {
1293     ENSURE_VALID_ENV(env);
1294     return PropertiesUtil::GetSystemProperty(env, property, value_ptr);
1295   }
1296 
SetSystemProperty(jvmtiEnv * env,const char * property,const char * value)1297   static jvmtiError SetSystemProperty(jvmtiEnv* env, const char* property, const char* value) {
1298     ENSURE_VALID_ENV(env);
1299     return PropertiesUtil::SetSystemProperty(env, property, value);
1300   }
1301 
GetPhase(jvmtiEnv * env,jvmtiPhase * phase_ptr)1302   static jvmtiError GetPhase(jvmtiEnv* env, jvmtiPhase* phase_ptr) {
1303     ENSURE_VALID_ENV(env);
1304     return PhaseUtil::GetPhase(env, phase_ptr);
1305   }
1306 
DisposeEnvironment(jvmtiEnv * env)1307   static jvmtiError DisposeEnvironment(jvmtiEnv* env) {
1308     ENSURE_VALID_ENV(env);
1309     ArtJvmTiEnv* tienv = ArtJvmTiEnv::AsArtJvmTiEnv(env);
1310     gEventHandler->RemoveArtJvmTiEnv(tienv);
1311     art::Runtime::Current()->RemoveSystemWeakHolder(tienv->object_tag_table.get());
1312     ThreadUtil::RemoveEnvironment(tienv);
1313     delete tienv;
1314     return OK;
1315   }
1316 
SetEnvironmentLocalStorage(jvmtiEnv * env,const void * data)1317   static jvmtiError SetEnvironmentLocalStorage(jvmtiEnv* env, const void* data) {
1318     ENSURE_VALID_ENV(env);
1319     reinterpret_cast<ArtJvmTiEnv*>(env)->local_data = const_cast<void*>(data);
1320     return OK;
1321   }
1322 
GetEnvironmentLocalStorage(jvmtiEnv * env,void ** data_ptr)1323   static jvmtiError GetEnvironmentLocalStorage(jvmtiEnv* env, void** data_ptr) {
1324     ENSURE_VALID_ENV(env);
1325     *data_ptr = reinterpret_cast<ArtJvmTiEnv*>(env)->local_data;
1326     return OK;
1327   }
1328 
GetVersionNumber(jvmtiEnv * env,jint * version_ptr)1329   static jvmtiError GetVersionNumber(jvmtiEnv* env, jint* version_ptr) {
1330     ENSURE_VALID_ENV(env);
1331     *version_ptr = ArtJvmTiEnv::AsArtJvmTiEnv(env)->ti_version;
1332     return OK;
1333   }
1334 
GetErrorName(jvmtiEnv * env,jvmtiError error,char ** name_ptr)1335   static jvmtiError GetErrorName(jvmtiEnv* env, jvmtiError error,  char** name_ptr) {
1336     ENSURE_NON_NULL(name_ptr);
1337     auto copy_fn = [&](const char* name_cstr) {
1338       jvmtiError res;
1339       JvmtiUniquePtr<char[]> copy = CopyString(env, name_cstr, &res);
1340       if (copy == nullptr) {
1341         *name_ptr = nullptr;
1342         return res;
1343       } else {
1344         *name_ptr = copy.release();
1345         return OK;
1346       }
1347     };
1348     switch (error) {
1349 #define ERROR_CASE(e) case (JVMTI_ERROR_ ## e) : \
1350         return copy_fn("JVMTI_ERROR_"#e);
1351       ERROR_CASE(NONE);
1352       ERROR_CASE(INVALID_THREAD);
1353       ERROR_CASE(INVALID_THREAD_GROUP);
1354       ERROR_CASE(INVALID_PRIORITY);
1355       ERROR_CASE(THREAD_NOT_SUSPENDED);
1356       ERROR_CASE(THREAD_SUSPENDED);
1357       ERROR_CASE(THREAD_NOT_ALIVE);
1358       ERROR_CASE(INVALID_OBJECT);
1359       ERROR_CASE(INVALID_CLASS);
1360       ERROR_CASE(CLASS_NOT_PREPARED);
1361       ERROR_CASE(INVALID_METHODID);
1362       ERROR_CASE(INVALID_LOCATION);
1363       ERROR_CASE(INVALID_FIELDID);
1364       ERROR_CASE(NO_MORE_FRAMES);
1365       ERROR_CASE(OPAQUE_FRAME);
1366       ERROR_CASE(TYPE_MISMATCH);
1367       ERROR_CASE(INVALID_SLOT);
1368       ERROR_CASE(DUPLICATE);
1369       ERROR_CASE(NOT_FOUND);
1370       ERROR_CASE(INVALID_MONITOR);
1371       ERROR_CASE(NOT_MONITOR_OWNER);
1372       ERROR_CASE(INTERRUPT);
1373       ERROR_CASE(INVALID_CLASS_FORMAT);
1374       ERROR_CASE(CIRCULAR_CLASS_DEFINITION);
1375       ERROR_CASE(FAILS_VERIFICATION);
1376       ERROR_CASE(UNSUPPORTED_REDEFINITION_METHOD_ADDED);
1377       ERROR_CASE(UNSUPPORTED_REDEFINITION_SCHEMA_CHANGED);
1378       ERROR_CASE(INVALID_TYPESTATE);
1379       ERROR_CASE(UNSUPPORTED_REDEFINITION_HIERARCHY_CHANGED);
1380       ERROR_CASE(UNSUPPORTED_REDEFINITION_METHOD_DELETED);
1381       ERROR_CASE(UNSUPPORTED_VERSION);
1382       ERROR_CASE(NAMES_DONT_MATCH);
1383       ERROR_CASE(UNSUPPORTED_REDEFINITION_CLASS_MODIFIERS_CHANGED);
1384       ERROR_CASE(UNSUPPORTED_REDEFINITION_METHOD_MODIFIERS_CHANGED);
1385       ERROR_CASE(UNMODIFIABLE_CLASS);
1386       ERROR_CASE(NOT_AVAILABLE);
1387       ERROR_CASE(MUST_POSSESS_CAPABILITY);
1388       ERROR_CASE(NULL_POINTER);
1389       ERROR_CASE(ABSENT_INFORMATION);
1390       ERROR_CASE(INVALID_EVENT_TYPE);
1391       ERROR_CASE(ILLEGAL_ARGUMENT);
1392       ERROR_CASE(NATIVE_METHOD);
1393       ERROR_CASE(CLASS_LOADER_UNSUPPORTED);
1394       ERROR_CASE(OUT_OF_MEMORY);
1395       ERROR_CASE(ACCESS_DENIED);
1396       ERROR_CASE(WRONG_PHASE);
1397       ERROR_CASE(INTERNAL);
1398       ERROR_CASE(UNATTACHED_THREAD);
1399       ERROR_CASE(INVALID_ENVIRONMENT);
1400 #undef ERROR_CASE
1401     }
1402 
1403     return ERR(ILLEGAL_ARGUMENT);
1404   }
1405 
SetVerboseFlag(jvmtiEnv * env,jvmtiVerboseFlag flag,jboolean value)1406   static jvmtiError SetVerboseFlag(jvmtiEnv* env,
1407                                    jvmtiVerboseFlag flag,
1408                                    jboolean value) {
1409     ENSURE_VALID_ENV(env);
1410     if (flag == jvmtiVerboseFlag::JVMTI_VERBOSE_OTHER) {
1411       // OTHER is special, as it's 0, so can't do a bit check.
1412       bool val = (value == JNI_TRUE) ? true : false;
1413 
1414       art::gLogVerbosity.collector = val;
1415       art::gLogVerbosity.compiler = val;
1416       art::gLogVerbosity.deopt = val;
1417       art::gLogVerbosity.heap = val;
1418       art::gLogVerbosity.jdwp = val;
1419       art::gLogVerbosity.jit = val;
1420       art::gLogVerbosity.monitor = val;
1421       art::gLogVerbosity.oat = val;
1422       art::gLogVerbosity.profiler = val;
1423       art::gLogVerbosity.signals = val;
1424       art::gLogVerbosity.simulator = val;
1425       art::gLogVerbosity.startup = val;
1426       art::gLogVerbosity.third_party_jni = val;
1427       art::gLogVerbosity.threads = val;
1428       art::gLogVerbosity.verifier = val;
1429       // Do not set verifier-debug.
1430       art::gLogVerbosity.image = val;
1431 
1432       // Note: can't switch systrace_lock_logging. That requires changing entrypoints.
1433 
1434       art::gLogVerbosity.agents = val;
1435     } else {
1436       // Spec isn't clear whether "flag" is a mask or supposed to be single. We implement the mask
1437       // semantics.
1438       constexpr std::underlying_type<jvmtiVerboseFlag>::type kMask =
1439           jvmtiVerboseFlag::JVMTI_VERBOSE_GC |
1440           jvmtiVerboseFlag::JVMTI_VERBOSE_CLASS |
1441           jvmtiVerboseFlag::JVMTI_VERBOSE_JNI;
1442       if ((flag & ~kMask) != 0) {
1443         return ERR(ILLEGAL_ARGUMENT);
1444       }
1445 
1446       bool val = (value == JNI_TRUE) ? true : false;
1447 
1448       if ((flag & jvmtiVerboseFlag::JVMTI_VERBOSE_GC) != 0) {
1449         art::gLogVerbosity.gc = val;
1450       }
1451 
1452       if ((flag & jvmtiVerboseFlag::JVMTI_VERBOSE_CLASS) != 0) {
1453         art::gLogVerbosity.class_linker = val;
1454       }
1455 
1456       if ((flag & jvmtiVerboseFlag::JVMTI_VERBOSE_JNI) != 0) {
1457         art::gLogVerbosity.jni = val;
1458       }
1459     }
1460 
1461     return ERR(NONE);
1462   }
1463 
GetJLocationFormat(jvmtiEnv * env,jvmtiJlocationFormat * format_ptr)1464   static jvmtiError GetJLocationFormat(jvmtiEnv* env, jvmtiJlocationFormat* format_ptr) {
1465     ENSURE_VALID_ENV(env);
1466     // Report BCI as jlocation format. We report dex bytecode indices.
1467     if (format_ptr == nullptr) {
1468       return ERR(NULL_POINTER);
1469     }
1470     *format_ptr = jvmtiJlocationFormat::JVMTI_JLOCATION_JVMBCI;
1471     return ERR(NONE);
1472   }
1473 };
1474 
IsJvmtiVersion(jint version)1475 static bool IsJvmtiVersion(jint version) {
1476   return version ==  JVMTI_VERSION_1 ||
1477          version == JVMTI_VERSION_1_0 ||
1478          version == JVMTI_VERSION_1_1 ||
1479          version == JVMTI_VERSION_1_2 ||
1480          version == JVMTI_VERSION;
1481 }
1482 
1483 extern const jvmtiInterface_1 gJvmtiInterface;
1484 
ArtJvmTiEnv(art::JavaVMExt * runtime,EventHandler * event_handler,jint version)1485 ArtJvmTiEnv::ArtJvmTiEnv(art::JavaVMExt* runtime, EventHandler* event_handler, jint version)
1486     : art_vm(runtime),
1487       local_data(nullptr),
1488       ti_version(version),
1489       capabilities(),
1490       event_info_mutex_("jvmtiEnv_EventInfoMutex") {
1491   object_tag_table = std::unique_ptr<ObjectTagTable>(new ObjectTagTable(event_handler, this));
1492   functions = &gJvmtiInterface;
1493 }
1494 
1495 // Creates a jvmtiEnv and returns it with the art::ti::Env that is associated with it. new_art_ti
1496 // is a pointer to the uninitialized memory for an art::ti::Env.
CreateArtJvmTiEnv(art::JavaVMExt * vm,jint version,void ** new_jvmtiEnv)1497 static void CreateArtJvmTiEnv(art::JavaVMExt* vm, jint version, /*out*/void** new_jvmtiEnv) {
1498   struct ArtJvmTiEnv* env = new ArtJvmTiEnv(vm, gEventHandler, version);
1499   *new_jvmtiEnv = env;
1500 
1501   gEventHandler->RegisterArtJvmTiEnv(env);
1502 
1503   art::Runtime::Current()->AddSystemWeakHolder(
1504       ArtJvmTiEnv::AsArtJvmTiEnv(env)->object_tag_table.get());
1505 }
1506 
1507 // A hook that the runtime uses to allow plugins to handle GetEnv calls. It returns true and
1508 // places the return value in 'env' if this library can handle the GetEnv request. Otherwise
1509 // returns false and does not modify the 'env' pointer.
GetEnvHandler(art::JavaVMExt * vm,void ** env,jint version)1510 static jint GetEnvHandler(art::JavaVMExt* vm, /*out*/void** env, jint version) {
1511   // JavaDebuggable will either be set by the runtime as it is starting up or the plugin if it's
1512   // loaded early enough. If this is false we cannot guarantee conformance to all JVMTI behaviors
1513   // due to optimizations. We will only allow agents to get ArtTiEnvs using the kArtTiVersion.
1514   if (IsFullJvmtiAvailable() && IsJvmtiVersion(version)) {
1515     CreateArtJvmTiEnv(vm, JVMTI_VERSION, env);
1516     return JNI_OK;
1517   } else if (version == kArtTiVersion) {
1518     CreateArtJvmTiEnv(vm, kArtTiVersion, env);
1519     return JNI_OK;
1520   } else {
1521     printf("version 0x%x is not valid!", version);
1522     return JNI_EVERSION;
1523   }
1524 }
1525 
1526 // The plugin initialization function. This adds the jvmti environment.
ArtPlugin_Initialize()1527 extern "C" bool ArtPlugin_Initialize() {
1528   art::Runtime* runtime = art::Runtime::Current();
1529 
1530   gDeoptManager = new DeoptManager;
1531   gEventHandler = new EventHandler;
1532 
1533   gDeoptManager->Setup();
1534   if (runtime->IsStarted()) {
1535     PhaseUtil::SetToLive();
1536   } else {
1537     PhaseUtil::SetToOnLoad();
1538   }
1539   PhaseUtil::Register(gEventHandler);
1540   ThreadUtil::Register(gEventHandler);
1541   ClassUtil::Register(gEventHandler);
1542   DumpUtil::Register(gEventHandler);
1543   MethodUtil::Register(gEventHandler);
1544   SearchUtil::Register();
1545   HeapUtil::Register();
1546   Transformer::Setup();
1547 
1548   {
1549     // Make sure we can deopt anything we need to.
1550     art::ScopedObjectAccess soa(art::Thread::Current());
1551     gDeoptManager->FinishSetup();
1552   }
1553 
1554   runtime->GetJavaVM()->AddEnvironmentHook(GetEnvHandler);
1555 
1556   return true;
1557 }
1558 
ArtPlugin_Deinitialize()1559 extern "C" bool ArtPlugin_Deinitialize() {
1560   gEventHandler->Shutdown();
1561   gDeoptManager->Shutdown();
1562   PhaseUtil::Unregister();
1563   ThreadUtil::Unregister();
1564   ClassUtil::Unregister();
1565   DumpUtil::Unregister();
1566   MethodUtil::Unregister();
1567   SearchUtil::Unregister();
1568   HeapUtil::Unregister();
1569 
1570   // TODO It would be good to delete the gEventHandler and gDeoptManager here but we cannot since
1571   // daemon threads might be suspended and we want to make sure that even if they wake up briefly
1572   // they won't hit deallocated memory. By this point none of the functions will do anything since
1573   // they have already shutdown.
1574 
1575   return true;
1576 }
1577 
1578 // The actual struct holding all of the entrypoints into the jvmti interface.
1579 const jvmtiInterface_1 gJvmtiInterface = {
1580   nullptr,  // reserved1
1581   JvmtiFunctions::SetEventNotificationMode,
1582   nullptr,  // reserved3
1583   JvmtiFunctions::GetAllThreads,
1584   JvmtiFunctions::SuspendThread,
1585   JvmtiFunctions::ResumeThread,
1586   JvmtiFunctions::StopThread,
1587   JvmtiFunctions::InterruptThread,
1588   JvmtiFunctions::GetThreadInfo,
1589   JvmtiFunctions::GetOwnedMonitorInfo,  // 10
1590   JvmtiFunctions::GetCurrentContendedMonitor,
1591   JvmtiFunctions::RunAgentThread,
1592   JvmtiFunctions::GetTopThreadGroups,
1593   JvmtiFunctions::GetThreadGroupInfo,
1594   JvmtiFunctions::GetThreadGroupChildren,
1595   JvmtiFunctions::GetFrameCount,
1596   JvmtiFunctions::GetThreadState,
1597   JvmtiFunctions::GetCurrentThread,
1598   JvmtiFunctions::GetFrameLocation,
1599   JvmtiFunctions::NotifyFramePop,  // 20
1600   JvmtiFunctions::GetLocalObject,
1601   JvmtiFunctions::GetLocalInt,
1602   JvmtiFunctions::GetLocalLong,
1603   JvmtiFunctions::GetLocalFloat,
1604   JvmtiFunctions::GetLocalDouble,
1605   JvmtiFunctions::SetLocalObject,
1606   JvmtiFunctions::SetLocalInt,
1607   JvmtiFunctions::SetLocalLong,
1608   JvmtiFunctions::SetLocalFloat,
1609   JvmtiFunctions::SetLocalDouble,  // 30
1610   JvmtiFunctions::CreateRawMonitor,
1611   JvmtiFunctions::DestroyRawMonitor,
1612   JvmtiFunctions::RawMonitorEnter,
1613   JvmtiFunctions::RawMonitorExit,
1614   JvmtiFunctions::RawMonitorWait,
1615   JvmtiFunctions::RawMonitorNotify,
1616   JvmtiFunctions::RawMonitorNotifyAll,
1617   JvmtiFunctions::SetBreakpoint,
1618   JvmtiFunctions::ClearBreakpoint,
1619   nullptr,  // reserved40
1620   JvmtiFunctions::SetFieldAccessWatch,
1621   JvmtiFunctions::ClearFieldAccessWatch,
1622   JvmtiFunctions::SetFieldModificationWatch,
1623   JvmtiFunctions::ClearFieldModificationWatch,
1624   JvmtiFunctions::IsModifiableClass,
1625   JvmtiFunctions::Allocate,
1626   JvmtiFunctions::Deallocate,
1627   JvmtiFunctions::GetClassSignature,
1628   JvmtiFunctions::GetClassStatus,
1629   JvmtiFunctions::GetSourceFileName,  // 50
1630   JvmtiFunctions::GetClassModifiers,
1631   JvmtiFunctions::GetClassMethods,
1632   JvmtiFunctions::GetClassFields,
1633   JvmtiFunctions::GetImplementedInterfaces,
1634   JvmtiFunctions::IsInterface,
1635   JvmtiFunctions::IsArrayClass,
1636   JvmtiFunctions::GetClassLoader,
1637   JvmtiFunctions::GetObjectHashCode,
1638   JvmtiFunctions::GetObjectMonitorUsage,
1639   JvmtiFunctions::GetFieldName,  // 60
1640   JvmtiFunctions::GetFieldDeclaringClass,
1641   JvmtiFunctions::GetFieldModifiers,
1642   JvmtiFunctions::IsFieldSynthetic,
1643   JvmtiFunctions::GetMethodName,
1644   JvmtiFunctions::GetMethodDeclaringClass,
1645   JvmtiFunctions::GetMethodModifiers,
1646   nullptr,  // reserved67
1647   JvmtiFunctions::GetMaxLocals,
1648   JvmtiFunctions::GetArgumentsSize,
1649   JvmtiFunctions::GetLineNumberTable,  // 70
1650   JvmtiFunctions::GetMethodLocation,
1651   JvmtiFunctions::GetLocalVariableTable,
1652   JvmtiFunctions::SetNativeMethodPrefix,
1653   JvmtiFunctions::SetNativeMethodPrefixes,
1654   JvmtiFunctions::GetBytecodes,
1655   JvmtiFunctions::IsMethodNative,
1656   JvmtiFunctions::IsMethodSynthetic,
1657   JvmtiFunctions::GetLoadedClasses,
1658   JvmtiFunctions::GetClassLoaderClasses,
1659   JvmtiFunctions::PopFrame,  // 80
1660   JvmtiFunctions::ForceEarlyReturnObject,
1661   JvmtiFunctions::ForceEarlyReturnInt,
1662   JvmtiFunctions::ForceEarlyReturnLong,
1663   JvmtiFunctions::ForceEarlyReturnFloat,
1664   JvmtiFunctions::ForceEarlyReturnDouble,
1665   JvmtiFunctions::ForceEarlyReturnVoid,
1666   JvmtiFunctions::RedefineClasses,
1667   JvmtiFunctions::GetVersionNumber,
1668   JvmtiFunctions::GetCapabilities,
1669   JvmtiFunctions::GetSourceDebugExtension,  // 90
1670   JvmtiFunctions::IsMethodObsolete,
1671   JvmtiFunctions::SuspendThreadList,
1672   JvmtiFunctions::ResumeThreadList,
1673   nullptr,  // reserved94
1674   nullptr,  // reserved95
1675   nullptr,  // reserved96
1676   nullptr,  // reserved97
1677   nullptr,  // reserved98
1678   nullptr,  // reserved99
1679   JvmtiFunctions::GetAllStackTraces,  // 100
1680   JvmtiFunctions::GetThreadListStackTraces,
1681   JvmtiFunctions::GetThreadLocalStorage,
1682   JvmtiFunctions::SetThreadLocalStorage,
1683   JvmtiFunctions::GetStackTrace,
1684   nullptr,  // reserved105
1685   JvmtiFunctions::GetTag,
1686   JvmtiFunctions::SetTag,
1687   JvmtiFunctions::ForceGarbageCollection,
1688   JvmtiFunctions::IterateOverObjectsReachableFromObject,
1689   JvmtiFunctions::IterateOverReachableObjects,  // 110
1690   JvmtiFunctions::IterateOverHeap,
1691   JvmtiFunctions::IterateOverInstancesOfClass,
1692   nullptr,  // reserved113
1693   JvmtiFunctions::GetObjectsWithTags,
1694   JvmtiFunctions::FollowReferences,
1695   JvmtiFunctions::IterateThroughHeap,
1696   nullptr,  // reserved117
1697   nullptr,  // reserved118
1698   nullptr,  // reserved119
1699   JvmtiFunctions::SetJNIFunctionTable,  // 120
1700   JvmtiFunctions::GetJNIFunctionTable,
1701   JvmtiFunctions::SetEventCallbacks,
1702   JvmtiFunctions::GenerateEvents,
1703   JvmtiFunctions::GetExtensionFunctions,
1704   JvmtiFunctions::GetExtensionEvents,
1705   JvmtiFunctions::SetExtensionEventCallback,
1706   JvmtiFunctions::DisposeEnvironment,
1707   JvmtiFunctions::GetErrorName,
1708   JvmtiFunctions::GetJLocationFormat,
1709   JvmtiFunctions::GetSystemProperties,  // 130
1710   JvmtiFunctions::GetSystemProperty,
1711   JvmtiFunctions::SetSystemProperty,
1712   JvmtiFunctions::GetPhase,
1713   JvmtiFunctions::GetCurrentThreadCpuTimerInfo,
1714   JvmtiFunctions::GetCurrentThreadCpuTime,
1715   JvmtiFunctions::GetThreadCpuTimerInfo,
1716   JvmtiFunctions::GetThreadCpuTime,
1717   JvmtiFunctions::GetTimerInfo,
1718   JvmtiFunctions::GetTime,
1719   JvmtiFunctions::GetPotentialCapabilities,  // 140
1720   nullptr,  // reserved141
1721   JvmtiFunctions::AddCapabilities,
1722   JvmtiFunctions::RelinquishCapabilities,
1723   JvmtiFunctions::GetAvailableProcessors,
1724   JvmtiFunctions::GetClassVersionNumbers,
1725   JvmtiFunctions::GetConstantPool,
1726   JvmtiFunctions::GetEnvironmentLocalStorage,
1727   JvmtiFunctions::SetEnvironmentLocalStorage,
1728   JvmtiFunctions::AddToBootstrapClassLoaderSearch,
1729   JvmtiFunctions::SetVerboseFlag,  // 150
1730   JvmtiFunctions::AddToSystemClassLoaderSearch,
1731   JvmtiFunctions::RetransformClasses,
1732   JvmtiFunctions::GetOwnedMonitorStackDepthInfo,
1733   JvmtiFunctions::GetObjectSize,
1734   JvmtiFunctions::GetLocalInstance,
1735 };
1736 
1737 };  // namespace openjdkjvmti
1738