1 /*
2 * Copyright (c) 2003, 2018, 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 "prims/jvmtiThreadState.inline.hpp"
33 #include "oops/oopHandle.hpp"
34 #include "runtime/fieldDescriptor.hpp"
35 #include "runtime/frame.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "runtime/thread.hpp"
38 #include "runtime/vm_operations.hpp"
39 #include "utilities/growableArray.hpp"
40 #include "utilities/macros.hpp"
41
42 //
43 // Forward Declarations
44 //
45
46 class JvmtiEnv;
47 class JvmtiThreadState;
48 class JvmtiRawMonitor; // for jvmtiEnv.hpp
49 class JvmtiEventControllerPrivate;
50 class JvmtiTagMap;
51
52
53
54 // One JvmtiEnv object is created per jvmti attachment;
55 // done via JNI GetEnv() call. Multiple attachments are
56 // allowed in jvmti.
57
58 class JvmtiEnvBase : public CHeapObj<mtInternal> {
59
60 private:
61
62 #if INCLUDE_JVMTI
63 static JvmtiEnvBase* _head_environment; // head of environment list
64 #endif // INCLUDE_JVMTI
65
66 static bool _globally_initialized;
67 static jvmtiPhase _phase;
68 static volatile int _dying_thread_env_iteration_count;
69
70 public:
71
72 enum {
73 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */
74 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */
75 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 2 /* version: 1.2.2 */
76 };
77
78 static jvmtiPhase get_phase() { return _phase; }
79 static jvmtiPhase get_phase(jvmtiEnv* env) { return ((JvmtiEnvBase*)JvmtiEnv_from_jvmti_env(env))->phase(); }
80 static void set_phase(jvmtiPhase phase) { _phase = phase; }
81 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; }
82
83 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; }
84 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; }
85 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; }
86
87 private:
88
89 enum {
90 JVMTI_MAGIC = 0x71EE,
91 DISPOSED_MAGIC = 0xDEFC,
92 BAD_MAGIC = 0xDEAD
93 };
94
95 jvmtiEnv _jvmti_external;
96 jint _magic;
97 jint _version; // version value passed to JNI GetEnv()
98 JvmtiEnvBase* _next;
99 bool _is_retransformable;
100 const void *_env_local_storage; // per env agent allocated data.
101 jvmtiEventCallbacks _event_callbacks;
102 jvmtiExtEventCallbacks _ext_event_callbacks;
103 JvmtiTagMap* _tag_map;
104 JvmtiEnvEventEnable _env_event_enable;
105 jvmtiCapabilities _current_capabilities;
106 jvmtiCapabilities _prohibited_capabilities;
107 volatile bool _class_file_load_hook_ever_enabled;
108 static volatile bool _needs_clean_up;
109 char** _native_method_prefixes;
110 int _native_method_prefix_count;
111
112 protected:
113 JvmtiEnvBase(jint version);
114 ~JvmtiEnvBase();
115 void dispose();
116 void env_dispose();
117
118 void set_env_local_storage(const void* data) { _env_local_storage = data; }
119 const void* get_env_local_storage() { return _env_local_storage; }
120
121 void record_class_file_load_hook_enabled();
122 void record_first_time_class_file_load_hook_enabled();
123
124 char** get_native_method_prefixes() { return _native_method_prefixes; }
125 int get_native_method_prefix_count() { return _native_method_prefix_count; }
126 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes);
127
128 private:
129 friend class JvmtiEventControllerPrivate;
130 void initialize();
131 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks);
132 static void globally_initialize();
133 static void periodic_clean_up();
134
135 friend class JvmtiEnvIterator;
136 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; }
137 void set_next_environment(JvmtiEnvBase* env) { _next = env; }
138 static JvmtiEnv* head_environment() {
139 JVMTI_ONLY(return (JvmtiEnv*)_head_environment);
140 NOT_JVMTI(return NULL);
141 }
142
143 public:
144
145 jvmtiPhase phase();
146 bool is_valid();
147
148 bool use_version_1_0_semantics(); // agent asked for version 1.0
149 bool use_version_1_1_semantics(); // agent asked for version 1.1
150 bool use_version_1_2_semantics(); // agent asked for version 1.2
151
152 bool is_retransformable() { return _is_retransformable; }
153
154 static ByteSize jvmti_external_offset() {
155 return byte_offset_of(JvmtiEnvBase, _jvmti_external);
156 };
157
158 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) {
159 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset()));
160 };
161
162 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; }
163
164 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; }
165
166 bool early_class_hook_env() {
167 return get_capabilities()->can_generate_early_class_hook_events != 0
168 && get_capabilities()->can_generate_all_class_hook_events != 0;
169 }
170
171 bool early_vmstart_env() {
172 return get_capabilities()->can_generate_early_vmstart != 0;
173 }
174
175 static char** get_all_native_method_prefixes(int* count_ptr);
176
177 // This test will answer true when all environments have been disposed and some have
178 // not yet been deallocated. As a result, this test should only be used as an
179 // optimization for the no environment case.
180 static bool environments_might_exist() {
181 return head_environment() != NULL;
182 }
183
184 static void check_for_periodic_clean_up();
185
186 JvmtiEnvEventEnable *env_event_enable() {
187 return &_env_event_enable;
188 }
189
190 jvmtiError allocate(jlong size, unsigned char** mem_ptr) {
191 if (size < 0) {
192 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
193 }
194 if (size == 0) {
195 *mem_ptr = NULL;
196 } else {
197 *mem_ptr = (unsigned char *)os::malloc((size_t)size, mtInternal);
198 if (*mem_ptr == NULL) {
199 return JVMTI_ERROR_OUT_OF_MEMORY;
200 }
201 }
202 return JVMTI_ERROR_NONE;
203 }
204
205 jvmtiError deallocate(unsigned char* mem) {
206 if (mem != NULL) {
207 os::free(mem);
208 }
209 return JVMTI_ERROR_NONE;
210 }
211
212
213 // Memory functions
214 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate
215
216 // method to create a local handle
217 jobject jni_reference(Handle hndl);
218
219 // method to create a local handle.
220 // This function allows caller to specify which
221 // threads local handle table to use.
222 jobject jni_reference(JavaThread *thread, Handle hndl);
223
224 // method to destroy a local handle
225 void destroy_jni_reference(jobject jobj);
226
227 // method to destroy a local handle.
228 // This function allows caller to specify which
229 // threads local handle table to use.
230 void destroy_jni_reference(JavaThread *thread, jobject jobj);
231
232 jvmtiEnv* jvmti_external() { return &_jvmti_external; };
233
234 // Event Dispatch
235
236 bool has_callback(jvmtiEvent event_type) {
237 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL &&
238 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking");
239 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL;
240 }
241
242 jvmtiEventCallbacks* callbacks() {
243 return &_event_callbacks;
244 }
245
246 jvmtiExtEventCallbacks* ext_callbacks() {
247 return &_ext_event_callbacks;
248 }
249
250 void set_tag_map(JvmtiTagMap* tag_map) {
251 _tag_map = tag_map;
252 }
253
254 JvmtiTagMap* tag_map() {
255 return _tag_map;
256 }
257
258
259 // return true if event is enabled globally or for any thread
260 // True only if there is a callback for it.
261 bool is_enabled(jvmtiEvent event_type) {
262 return _env_event_enable.is_enabled(event_type);
263 }
264
265 // Random Utilities
266
267 protected:
268 // helper methods for creating arrays of global JNI Handles from local Handles
269 // allocated into environment specific storage
270 jobject * new_jobjectArray(int length, Handle *handles);
271 jthread * new_jthreadArray(int length, Handle *handles);
272 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles);
273
274 // convert to a jni jclass from a non-null Klass*
275 jclass get_jni_class_non_null(Klass* k);
276
277 jint count_locked_objects(JavaThread *java_thread, Handle hobj);
278 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread,
279 JavaThread* java_thread,
280 javaVFrame *jvf,
281 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list,
282 jint depth);
283 vframe* vframeFor(JavaThread* java_thread, jint depth);
284
285 public:
286 // get a field descriptor for the specified class and field
287 static bool get_field_descriptor(Klass* k, jfieldID field, fieldDescriptor* fd);
288
289 // JVMTI API helper functions which are called at safepoint or thread is suspended.
290 jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr);
291 jvmtiError get_frame_location(JavaThread* java_thread, jint depth,
292 jmethodID* method_ptr, jlocation* location_ptr);
293 jvmtiError get_object_monitor_usage(JavaThread *calling_thread,
294 jobject object, jvmtiMonitorUsage* info_ptr);
295 jvmtiError get_stack_trace(JavaThread *java_thread,
296 jint stack_depth, jint max_count,
297 jvmtiFrameInfo* frame_buffer, jint* count_ptr);
298 jvmtiError get_current_contended_monitor(JavaThread *calling_thread,
299 JavaThread *java_thread,
300 jobject *monitor_ptr);
301 jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread,
302 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list);
303 jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread,
304 jvalue value, TosState tos, Handle* ret_ob_h);
305 jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos);
306 };
307
308 // This class is the only safe means of iterating through environments.
309 // Note that this iteratation includes invalid environments pending
310 // deallocation -- in fact, some uses depend on this behavior.
311
312 class JvmtiEnvIterator : public StackObj {
313 private:
314 bool _entry_was_marked;
315 public:
316 JvmtiEnvIterator() {
317 if (Threads::number_of_threads() == 0) {
318 _entry_was_marked = false; // we are single-threaded, no need
319 } else {
320 Thread::current()->entering_jvmti_env_iteration();
321 _entry_was_marked = true;
322 }
323 }
324 ~JvmtiEnvIterator() {
325 if (_entry_was_marked) {
326 Thread::current()->leaving_jvmti_env_iteration();
327 }
328 }
329 JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); }
330 JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); }
331 };
332
333 // VM operation to update for pop top frame.
334 class VM_UpdateForPopTopFrame : public VM_Operation {
335 private:
336 JvmtiThreadState* _state;
337 jvmtiError _result;
338
339 public:
340 VM_UpdateForPopTopFrame(JvmtiThreadState* state) {
341 _state = state;
342 _result = JVMTI_ERROR_NONE;
343 }
344 VMOp_Type type() const { return VMOp_UpdateForPopTopFrame; }
345 jvmtiError result() { return _result; }
346 void doit();
347 };
348
349 // VM operation to set frame pop.
350 class VM_SetFramePop : public VM_Operation {
351 private:
352 JvmtiEnv *_env;
353 JvmtiThreadState* _state;
354 jint _depth;
355 jvmtiError _result;
356
357 public:
358 VM_SetFramePop(JvmtiEnv *env, JvmtiThreadState* state, jint depth) {
359 _env = env;
360 _state = state;
361 _depth = depth;
362 _result = JVMTI_ERROR_NONE;
363 }
364 // Nested operation must be allowed for the VM_EnterInterpOnlyMode that is
365 // called from the JvmtiEventControllerPrivate::recompute_thread_enabled.
366 bool allow_nested_vm_operations() const { return true; }
367 VMOp_Type type() const { return VMOp_SetFramePop; }
368 jvmtiError result() { return _result; }
369 void doit();
370 };
371
372
373 // VM operation to get monitor information with stack depth.
374 class VM_GetOwnedMonitorInfo : public VM_Operation {
375 private:
376 JvmtiEnv *_env;
377 JavaThread* _calling_thread;
378 JavaThread *_java_thread;
379 jvmtiError _result;
380 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list;
381
382 public:
383 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread,
384 JavaThread* java_thread,
385 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) {
386 _env = env;
387 _calling_thread = calling_thread;
388 _java_thread = java_thread;
389 _owned_monitors_list = owned_monitor_list;
390 _result = JVMTI_ERROR_NONE;
391 }
392 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; }
393 void doit();
394 jvmtiError result() { return _result; }
395 };
396
397
398 // VM operation to get object monitor usage.
399 class VM_GetObjectMonitorUsage : public VM_Operation {
400 private:
401 JvmtiEnv *_env;
402 jobject _object;
403 JavaThread* _calling_thread;
404 jvmtiMonitorUsage* _info_ptr;
405 jvmtiError _result;
406
407 public:
408 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) {
409 _env = env;
410 _object = object;
411 _calling_thread = calling_thread;
412 _info_ptr = info_ptr;
413 }
414 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; }
415 jvmtiError result() { return _result; }
416 void doit() {
417 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr);
418 }
419
420 };
421
422 // VM operation to get current contended monitor.
423 class VM_GetCurrentContendedMonitor : public VM_Operation {
424 private:
425 JvmtiEnv *_env;
426 JavaThread *_calling_thread;
427 JavaThread *_java_thread;
428 jobject *_owned_monitor_ptr;
429 jvmtiError _result;
430
431 public:
432 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) {
433 _env = env;
434 _calling_thread = calling_thread;
435 _java_thread = java_thread;
436 _owned_monitor_ptr = mon_ptr;
437 }
438 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; }
439 jvmtiError result() { return _result; }
440 void doit();
441 };
442
443 // VM operation to get stack trace at safepoint.
444 class VM_GetStackTrace : public VM_Operation {
445 private:
446 JvmtiEnv *_env;
447 JavaThread *_java_thread;
448 jint _start_depth;
449 jint _max_count;
450 jvmtiFrameInfo *_frame_buffer;
451 jint *_count_ptr;
452 jvmtiError _result;
453
454 public:
455 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread,
456 jint start_depth, jint max_count,
457 jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
458 _env = env;
459 _java_thread = java_thread;
460 _start_depth = start_depth;
461 _max_count = max_count;
462 _frame_buffer = frame_buffer;
463 _count_ptr = count_ptr;
464 }
465 jvmtiError result() { return _result; }
466 VMOp_Type type() const { return VMOp_GetStackTrace; }
467 void doit();
468 };
469
470 // forward declaration
471 struct StackInfoNode;
472
473 // VM operation to get stack trace at safepoint.
474 class VM_GetMultipleStackTraces : public VM_Operation {
475 private:
476 JvmtiEnv *_env;
477 jint _max_frame_count;
478 jvmtiStackInfo *_stack_info;
479 jvmtiError _result;
480 int _frame_count_total;
481 struct StackInfoNode *_head;
482
483 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; }
484 jint max_frame_count() { return _max_frame_count; }
485 struct StackInfoNode *head() { return _head; }
486 void set_head(StackInfoNode *head) { _head = head; }
487
488 protected:
489 void set_result(jvmtiError result) { _result = result; }
490 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop);
491 void allocate_and_fill_stacks(jint thread_count);
492
493 public:
494 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) {
495 _env = env;
496 _max_frame_count = max_frame_count;
497 _frame_count_total = 0;
498 _head = NULL;
499 _result = JVMTI_ERROR_NONE;
500 }
501 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; }
502 jvmtiStackInfo *stack_info() { return _stack_info; }
503 jvmtiError result() { return _result; }
504 };
505
506
507 // VM operation to get stack trace at safepoint.
508 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces {
509 private:
510 JavaThread *_calling_thread;
511 jint _final_thread_count;
512
513 public:
514 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread,
515 jint max_frame_count)
516 : VM_GetMultipleStackTraces(env, max_frame_count) {
517 _calling_thread = calling_thread;
518 }
519 VMOp_Type type() const { return VMOp_GetAllStackTraces; }
520 void doit();
521 jint final_thread_count() { return _final_thread_count; }
522 };
523
524 // VM operation to get stack trace at safepoint.
525 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces {
526 private:
527 jint _thread_count;
528 const jthread* _thread_list;
529
530 public:
531 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count)
532 : VM_GetMultipleStackTraces(env, max_frame_count) {
533 _thread_count = thread_count;
534 _thread_list = thread_list;
535 }
536 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; }
537 void doit();
538 };
539
540
541 // VM operation to count stack frames at safepoint.
542 class VM_GetFrameCount : public VM_Operation {
543 private:
544 JvmtiEnv *_env;
545 JvmtiThreadState *_state;
546 jint *_count_ptr;
547 jvmtiError _result;
548
549 public:
550 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) {
551 _env = env;
552 _state = state;
553 _count_ptr = count_ptr;
554 }
555 VMOp_Type type() const { return VMOp_GetFrameCount; }
556 jvmtiError result() { return _result; }
557 void doit();
558 };
559
560 // VM operation to frame location at safepoint.
561 class VM_GetFrameLocation : public VM_Operation {
562 private:
563 JvmtiEnv *_env;
564 JavaThread* _java_thread;
565 jint _depth;
566 jmethodID* _method_ptr;
567 jlocation* _location_ptr;
568 jvmtiError _result;
569
570 public:
571 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth,
572 jmethodID* method_ptr, jlocation* location_ptr) {
573 _env = env;
574 _java_thread = java_thread;
575 _depth = depth;
576 _method_ptr = method_ptr;
577 _location_ptr = location_ptr;
578 }
579 VMOp_Type type() const { return VMOp_GetFrameLocation; }
580 jvmtiError result() { return _result; }
581 void doit();
582 };
583
584
585 // ResourceTracker
586 //
587 // ResourceTracker works a little like a ResourceMark. All allocates
588 // using the resource tracker are recorded. If an allocate using the
589 // resource tracker fails the destructor will free any resources
590 // that were allocated using the tracker.
591 // The motive for this class is to avoid messy error recovery code
592 // in situations where multiple allocations are done in sequence. If
593 // the second or subsequent allocation fails it avoids any code to
594 // release memory allocated in the previous calls.
595 //
596 // Usage :-
597 // ResourceTracker rt(env);
598 // :
599 // err = rt.allocate(1024, &ptr);
600
601 class ResourceTracker : public StackObj {
602 private:
603 JvmtiEnv* _env;
604 GrowableArray<unsigned char*> *_allocations;
605 bool _failed;
606 public:
607 ResourceTracker(JvmtiEnv* env);
608 ~ResourceTracker();
609 jvmtiError allocate(jlong size, unsigned char** mem_ptr);
610 unsigned char* allocate(jlong size);
611 char* strdup(const char* str);
612 };
613
614
615 // Jvmti monitor closure to collect off stack monitors.
616 class JvmtiMonitorClosure: public MonitorClosure {
617 private:
618 JavaThread *_java_thread;
619 JavaThread *_calling_thread;
620 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list;
621 jvmtiError _error;
622 JvmtiEnvBase *_env;
623
624 public:
625 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread,
626 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors,
627 JvmtiEnvBase *env) {
628 _java_thread = thread;
629 _calling_thread = calling_thread;
630 _owned_monitors_list = owned_monitors;
631 _error = JVMTI_ERROR_NONE;
632 _env = env;
633 }
634 void do_monitor(ObjectMonitor* mon);
635 jvmtiError error() { return _error;}
636 };
637
638
639 // Jvmti module closure to collect all modules loaded to the system.
640 class JvmtiModuleClosure : public StackObj {
641 private:
642 static GrowableArray<OopHandle> *_tbl; // Protected with Module_lock
643
644 static void do_module(ModuleEntry* entry) {
645 assert_locked_or_safepoint(Module_lock);
646 OopHandle module = entry->module_handle();
647 guarantee(module.resolve() != NULL, "module object is NULL");
648 _tbl->push(module);
649 }
650
651 public:
652 jvmtiError get_all_modules(JvmtiEnv* env, jint* module_count_ptr, jobject** modules_ptr);
653 };
654
655 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP