1 /*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_PRIMS_JVMTIENVBASE_HPP
26 #define SHARE_VM_PRIMS_JVMTIENVBASE_HPP
27
28 #include "classfile/classLoader.hpp"
29 #include "prims/jvmtiEnvThreadState.hpp"
30 #include "prims/jvmtiEventController.hpp"
31 #include "prims/jvmtiThreadState.hpp"
32 #include "runtime/fieldDescriptor.hpp"
33 #include "runtime/frame.hpp"
34 #include "runtime/handles.inline.hpp"
35 #include "runtime/thread.hpp"
36 #include "runtime/vm_operations.hpp"
37 #include "utilities/growableArray.hpp"
38 #include "utilities/macros.hpp"
39
40 //
41 // Forward Declarations
42 //
43
44 class JvmtiEnv;
45 class JvmtiThreadState;
46 class JvmtiRawMonitor; // for jvmtiEnv.hpp
47 class JvmtiEventControllerPrivate;
48 class JvmtiTagMap;
49
50
51
52 // One JvmtiEnv object is created per jvmti attachment;
53 // done via JNI GetEnv() call. Multiple attachments are
54 // allowed in jvmti.
55
56 class JvmtiEnvBase : public CHeapObj<mtInternal> {
57
58 private:
59
60 #if INCLUDE_JVMTI
61 static JvmtiEnvBase* _head_environment; // head of environment list
62 #endif // INCLUDE_JVMTI
63
64 static bool _globally_initialized;
65 static jvmtiPhase _phase;
66 static volatile int _dying_thread_env_iteration_count;
67
68 public:
69
70 enum {
71 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */
72 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */
73 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 2 /* version: 1.2.2 */
74 };
75
76 static jvmtiPhase get_phase() { return _phase; }
77 static void set_phase(jvmtiPhase phase) { _phase = phase; }
78 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; }
79
80 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; }
81 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; }
82 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; }
83
84 private:
85
86 enum {
87 JVMTI_MAGIC = 0x71EE,
88 DISPOSED_MAGIC = 0xDEFC,
89 BAD_MAGIC = 0xDEAD
90 };
91
92 jvmtiEnv _jvmti_external;
93 jint _magic;
94 jint _version; // version value passed to JNI GetEnv()
95 JvmtiEnvBase* _next;
96 bool _is_retransformable;
97 const void *_env_local_storage; // per env agent allocated data.
98 jvmtiEventCallbacks _event_callbacks;
99 jvmtiExtEventCallbacks _ext_event_callbacks;
100 JvmtiTagMap* _tag_map;
101 JvmtiEnvEventEnable _env_event_enable;
102 jvmtiCapabilities _current_capabilities;
103 jvmtiCapabilities _prohibited_capabilities;
104 volatile bool _class_file_load_hook_ever_enabled;
105 static volatile bool _needs_clean_up;
106 char** _native_method_prefixes;
107 int _native_method_prefix_count;
108
109 protected:
110 JvmtiEnvBase(jint version);
111 ~JvmtiEnvBase();
112 void dispose();
113 void env_dispose();
114
115 void set_env_local_storage(const void* data) { _env_local_storage = data; }
116 const void* get_env_local_storage() { return _env_local_storage; }
117
118 void record_class_file_load_hook_enabled();
119 void record_first_time_class_file_load_hook_enabled();
120
121 char** get_native_method_prefixes() { return _native_method_prefixes; }
122 int get_native_method_prefix_count() { return _native_method_prefix_count; }
123 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes);
124
125 private:
126 friend class JvmtiEventControllerPrivate;
127 void initialize();
128 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks);
129 static void globally_initialize();
130 static void periodic_clean_up();
131
132 friend class JvmtiEnvIterator;
133 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; }
134 void set_next_environment(JvmtiEnvBase* env) { _next = env; }
135 static JvmtiEnv* head_environment() {
136 JVMTI_ONLY(return (JvmtiEnv*)_head_environment);
137 NOT_JVMTI(return NULL);
138 }
139
140 public:
141
142 bool is_valid();
143
144 bool use_version_1_0_semantics(); // agent asked for version 1.0
145 bool use_version_1_1_semantics(); // agent asked for version 1.1
146 bool use_version_1_2_semantics(); // agent asked for version 1.2
147
148 bool is_retransformable() { return _is_retransformable; }
149
150 static ByteSize jvmti_external_offset() {
151 return byte_offset_of(JvmtiEnvBase, _jvmti_external);
152 };
153
154 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) {
155 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset()));
156 };
157
158 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; }
159
160 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; }
161
162 static char** get_all_native_method_prefixes(int* count_ptr);
163
164 // This test will answer true when all environments have been disposed and some have
165 // not yet been deallocated. As a result, this test should only be used as an
166 // optimization for the no environment case.
167 static bool environments_might_exist() {
168 return head_environment() != NULL;
169 }
170
171 static void check_for_periodic_clean_up();
172
173 JvmtiEnvEventEnable *env_event_enable() {
174 return &_env_event_enable;
175 }
176
177 jvmtiError allocate(jlong size, unsigned char** mem_ptr) {
178 if (size < 0) {
179 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
180 }
181 if (size == 0) {
182 *mem_ptr = NULL;
183 } else {
184 *mem_ptr = (unsigned char *)os::malloc((size_t)size, mtInternal);
185 if (*mem_ptr == NULL) {
186 return JVMTI_ERROR_OUT_OF_MEMORY;
187 }
188 }
189 return JVMTI_ERROR_NONE;
190 }
191
192 jvmtiError deallocate(unsigned char* mem) {
193 if (mem != NULL) {
194 os::free(mem, mtInternal);
195 }
196 return JVMTI_ERROR_NONE;
197 }
198
199
200 // Memory functions
201 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate
202
203 // method to create a local handle
204 jobject jni_reference(Handle hndl) {
205 return JNIHandles::make_local(hndl());
206 }
207
208 // method to create a local handle.
209 // This function allows caller to specify which
210 // threads local handle table to use.
211 jobject jni_reference(JavaThread *thread, Handle hndl) {
212 return JNIHandles::make_local(thread, hndl());
213 }
214
215 // method to destroy a local handle
216 void destroy_jni_reference(jobject jobj) {
217 JNIHandles::destroy_local(jobj);
218 }
219
220 // method to destroy a local handle.
221 // This function allows caller to specify which
222 // threads local handle table to use although currently it is
223 // not used.
224 void destroy_jni_reference(JavaThread *thread, jobject jobj) {
225 destroy_jni_reference(jobj);
226 }
227
228 jvmtiEnv* jvmti_external() { return &_jvmti_external; };
229
230 // Event Dispatch
231
232 bool has_callback(jvmtiEvent event_type) {
233 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL &&
234 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking");
235 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL;
236 }
237
238 jvmtiEventCallbacks* callbacks() {
239 return &_event_callbacks;
240 }
241
242 jvmtiExtEventCallbacks* ext_callbacks() {
243 return &_ext_event_callbacks;
244 }
245
246 void set_tag_map(JvmtiTagMap* tag_map) {
247 _tag_map = tag_map;
248 }
249
250 JvmtiTagMap* tag_map() {
251 return _tag_map;
252 }
253
254
255 // return true if event is enabled globally or for any thread
256 // True only if there is a callback for it.
257 bool is_enabled(jvmtiEvent event_type) {
258 return _env_event_enable.is_enabled(event_type);
259 }
260
261 // Random Utilities
262
263 protected:
264 // helper methods for creating arrays of global JNI Handles from local Handles
265 // allocated into environment specific storage
266 jobject * new_jobjectArray(int length, Handle *handles);
267 jthread * new_jthreadArray(int length, Handle *handles);
268 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles);
269
270 // convert from JNIHandle to JavaThread *
271 JavaThread * get_JavaThread(jthread jni_thread);
272
273 // convert to a jni jclass from a non-null Klass*
274 jclass get_jni_class_non_null(Klass* k);
275
276 jint count_locked_objects(JavaThread *java_thread, Handle hobj);
277 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread,
278 JavaThread* java_thread,
279 javaVFrame *jvf,
280 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list,
281 jint depth);
282 vframe* vframeFor(JavaThread* java_thread, jint depth);
283
284 public:
285 // get a field descriptor for the specified class and field
286 static bool get_field_descriptor(Klass* k, jfieldID field, fieldDescriptor* fd);
287 // test for suspend - most (all?) of these should go away
288 static bool is_thread_fully_suspended(JavaThread *thread,
289 bool wait_for_suspend,
290 uint32_t *bits);
291
292
293 // JVMTI API helper functions which are called at safepoint or thread is suspended.
294 jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr);
295 jvmtiError get_frame_location(JavaThread* java_thread, jint depth,
296 jmethodID* method_ptr, jlocation* location_ptr);
297 jvmtiError get_object_monitor_usage(JavaThread *calling_thread,
298 jobject object, jvmtiMonitorUsage* info_ptr);
299 jvmtiError get_stack_trace(JavaThread *java_thread,
300 jint stack_depth, jint max_count,
301 jvmtiFrameInfo* frame_buffer, jint* count_ptr);
302 jvmtiError get_current_contended_monitor(JavaThread *calling_thread,
303 JavaThread *java_thread,
304 jobject *monitor_ptr);
305 jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread,
306 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list);
307 jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread,
308 jvalue value, TosState tos, Handle* ret_ob_h);
309 jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos);
310 };
311
312 // This class is the only safe means of iterating through environments.
313 // Note that this iteratation includes invalid environments pending
314 // deallocation -- in fact, some uses depend on this behavior.
315
316 class JvmtiEnvIterator : public StackObj {
317 private:
318 bool _entry_was_marked;
319 public:
320 JvmtiEnvIterator() {
321 if (Threads::number_of_threads() == 0) {
322 _entry_was_marked = false; // we are single-threaded, no need
323 } else {
324 Thread::current()->entering_jvmti_env_iteration();
325 _entry_was_marked = true;
326 }
327 }
328 ~JvmtiEnvIterator() {
329 if (_entry_was_marked) {
330 Thread::current()->leaving_jvmti_env_iteration();
331 }
332 }
333 JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); }
334 JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); }
335 };
336
337 // VM operation to update for pop top frame.
338 class VM_UpdateForPopTopFrame : public VM_Operation {
339 private:
340 JvmtiThreadState* _state;
341 jvmtiError _result;
342
343 public:
344 VM_UpdateForPopTopFrame(JvmtiThreadState* state) {
345 _state = state;
346 _result = JVMTI_ERROR_NONE;
347 }
348 VMOp_Type type() const { return VMOp_UpdateForPopTopFrame; }
349 jvmtiError result() { return _result; }
350 void doit() {
351 JavaThread* jt = _state->get_thread();
352 if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) {
353 _state->update_for_pop_top_frame();
354 } else {
355 _result = JVMTI_ERROR_THREAD_NOT_ALIVE;
356 }
357 }
358 };
359
360
361 // VM operation to get monitor information with stack depth.
362 class VM_GetOwnedMonitorInfo : public VM_Operation {
363 private:
364 JvmtiEnv *_env;
365 JavaThread* _calling_thread;
366 JavaThread *_java_thread;
367 jvmtiError _result;
368 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list;
369
370 public:
371 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread,
372 JavaThread* java_thread,
373 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) {
374 _env = env;
375 _calling_thread = calling_thread;
376 _java_thread = java_thread;
377 _owned_monitors_list = owned_monitor_list;
378 _result = JVMTI_ERROR_NONE;
379 }
380 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; }
381 void doit() {
382 _result = JVMTI_ERROR_THREAD_NOT_ALIVE;
383 if (Threads::includes(_java_thread) && !_java_thread->is_exiting()
384 && _java_thread->threadObj() != NULL) {
385 _result = ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread,
386 _owned_monitors_list);
387 }
388 }
389 jvmtiError result() { return _result; }
390 };
391
392
393 // VM operation to get object monitor usage.
394 class VM_GetObjectMonitorUsage : public VM_Operation {
395 private:
396 JvmtiEnv *_env;
397 jobject _object;
398 JavaThread* _calling_thread;
399 jvmtiMonitorUsage* _info_ptr;
400 jvmtiError _result;
401
402 public:
403 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) {
404 _env = env;
405 _object = object;
406 _calling_thread = calling_thread;
407 _info_ptr = info_ptr;
408 }
409 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; }
410 jvmtiError result() { return _result; }
411 void doit() {
412 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr);
413 }
414
415 };
416
417 // VM operation to get current contended monitor.
418 class VM_GetCurrentContendedMonitor : public VM_Operation {
419 private:
420 JvmtiEnv *_env;
421 JavaThread *_calling_thread;
422 JavaThread *_java_thread;
423 jobject *_owned_monitor_ptr;
424 jvmtiError _result;
425
426 public:
427 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) {
428 _env = env;
429 _calling_thread = calling_thread;
430 _java_thread = java_thread;
431 _owned_monitor_ptr = mon_ptr;
432 }
433 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; }
434 jvmtiError result() { return _result; }
435 void doit() {
436 _result = JVMTI_ERROR_THREAD_NOT_ALIVE;
437 if (Threads::includes(_java_thread) && !_java_thread->is_exiting() &&
438 _java_thread->threadObj() != NULL) {
439 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr);
440 }
441 }
442 };
443
444 // VM operation to get stack trace at safepoint.
445 class VM_GetStackTrace : public VM_Operation {
446 private:
447 JvmtiEnv *_env;
448 JavaThread *_java_thread;
449 jint _start_depth;
450 jint _max_count;
451 jvmtiFrameInfo *_frame_buffer;
452 jint *_count_ptr;
453 jvmtiError _result;
454
455 public:
456 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread,
457 jint start_depth, jint max_count,
458 jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
459 _env = env;
460 _java_thread = java_thread;
461 _start_depth = start_depth;
462 _max_count = max_count;
463 _frame_buffer = frame_buffer;
464 _count_ptr = count_ptr;
465 }
466 jvmtiError result() { return _result; }
467 VMOp_Type type() const { return VMOp_GetStackTrace; }
468 void doit() {
469 _result = JVMTI_ERROR_THREAD_NOT_ALIVE;
470 if (Threads::includes(_java_thread) && !_java_thread->is_exiting()
471 && _java_thread->threadObj() != NULL) {
472 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread,
473 _start_depth, _max_count,
474 _frame_buffer, _count_ptr);
475 }
476 }
477 };
478
479 // forward declaration
480 struct StackInfoNode;
481
482 // VM operation to get stack trace at safepoint.
483 class VM_GetMultipleStackTraces : public VM_Operation {
484 private:
485 JvmtiEnv *_env;
486 jint _max_frame_count;
487 jvmtiStackInfo *_stack_info;
488 jvmtiError _result;
489 int _frame_count_total;
490 struct StackInfoNode *_head;
491
492 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; }
493 jint max_frame_count() { return _max_frame_count; }
494 struct StackInfoNode *head() { return _head; }
495 void set_head(StackInfoNode *head) { _head = head; }
496
497 protected:
498 void set_result(jvmtiError result) { _result = result; }
499 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop);
500 void allocate_and_fill_stacks(jint thread_count);
501
502 public:
503 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) {
504 _env = env;
505 _max_frame_count = max_frame_count;
506 _frame_count_total = 0;
507 _head = NULL;
508 _result = JVMTI_ERROR_NONE;
509 }
510 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; }
511 jvmtiStackInfo *stack_info() { return _stack_info; }
512 jvmtiError result() { return _result; }
513 };
514
515
516 // VM operation to get stack trace at safepoint.
517 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces {
518 private:
519 JavaThread *_calling_thread;
520 jint _final_thread_count;
521
522 public:
523 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread,
524 jint max_frame_count)
525 : VM_GetMultipleStackTraces(env, max_frame_count) {
526 _calling_thread = calling_thread;
527 }
528 VMOp_Type type() const { return VMOp_GetAllStackTraces; }
529 void doit();
530 jint final_thread_count() { return _final_thread_count; }
531 };
532
533 // VM operation to get stack trace at safepoint.
534 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces {
535 private:
536 jint _thread_count;
537 const jthread* _thread_list;
538
539 public:
540 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count)
541 : VM_GetMultipleStackTraces(env, max_frame_count) {
542 _thread_count = thread_count;
543 _thread_list = thread_list;
544 }
545 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; }
546 void doit();
547 };
548
549
550 // VM operation to count stack frames at safepoint.
551 class VM_GetFrameCount : public VM_Operation {
552 private:
553 JvmtiEnv *_env;
554 JvmtiThreadState *_state;
555 jint *_count_ptr;
556 jvmtiError _result;
557
558 public:
559 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) {
560 _env = env;
561 _state = state;
562 _count_ptr = count_ptr;
563 }
564 VMOp_Type type() const { return VMOp_GetFrameCount; }
565 jvmtiError result() { return _result; }
566 void doit() {
567 _result = JVMTI_ERROR_THREAD_NOT_ALIVE;
568 JavaThread* jt = _state->get_thread();
569 if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) {
570 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr);
571 }
572 }
573 };
574
575 // VM operation to frame location at safepoint.
576 class VM_GetFrameLocation : public VM_Operation {
577 private:
578 JvmtiEnv *_env;
579 JavaThread* _java_thread;
580 jint _depth;
581 jmethodID* _method_ptr;
582 jlocation* _location_ptr;
583 jvmtiError _result;
584
585 public:
586 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth,
587 jmethodID* method_ptr, jlocation* location_ptr) {
588 _env = env;
589 _java_thread = java_thread;
590 _depth = depth;
591 _method_ptr = method_ptr;
592 _location_ptr = location_ptr;
593 }
594 VMOp_Type type() const { return VMOp_GetFrameLocation; }
595 jvmtiError result() { return _result; }
596 void doit() {
597 _result = JVMTI_ERROR_THREAD_NOT_ALIVE;
598 if (Threads::includes(_java_thread) && !_java_thread->is_exiting() &&
599 _java_thread->threadObj() != NULL) {
600 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth,
601 _method_ptr, _location_ptr);
602 }
603 }
604 };
605
606
607 // ResourceTracker
608 //
609 // ResourceTracker works a little like a ResourceMark. All allocates
610 // using the resource tracker are recorded. If an allocate using the
611 // resource tracker fails the destructor will free any resources
612 // that were allocated using the tracker.
613 // The motive for this class is to avoid messy error recovery code
614 // in situations where multiple allocations are done in sequence. If
615 // the second or subsequent allocation fails it avoids any code to
616 // release memory allocated in the previous calls.
617 //
618 // Usage :-
619 // ResourceTracker rt(env);
620 // :
621 // err = rt.allocate(1024, &ptr);
622
623 class ResourceTracker : public StackObj {
624 private:
625 JvmtiEnv* _env;
626 GrowableArray<unsigned char*> *_allocations;
627 bool _failed;
628 public:
629 ResourceTracker(JvmtiEnv* env);
630 ~ResourceTracker();
631 jvmtiError allocate(jlong size, unsigned char** mem_ptr);
632 unsigned char* allocate(jlong size);
633 char* strdup(const char* str);
634 };
635
636
637 // Jvmti monitor closure to collect off stack monitors.
638 class JvmtiMonitorClosure: public MonitorClosure {
639 private:
640 JavaThread *_java_thread;
641 JavaThread *_calling_thread;
642 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list;
643 jvmtiError _error;
644 JvmtiEnvBase *_env;
645
646 public:
647 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread,
648 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors,
649 JvmtiEnvBase *env) {
650 _java_thread = thread;
651 _calling_thread = calling_thread;
652 _owned_monitors_list = owned_monitors;
653 _error = JVMTI_ERROR_NONE;
654 _env = env;
655 }
656 void do_monitor(ObjectMonitor* mon);
657 jvmtiError error() { return _error;}
658 };
659
660 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP