Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiEnvBase.hpp @ 2125:7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
Summary: Make JvmtiGCMark safe to run non-safepoint and instrument CMS
Reviewed-by: ysr, dcubed
author | kamg |
---|---|
date | Mon, 10 Jan 2011 17:14:53 -0500 |
parents | 684faacebf20 |
children | e6b1331a51d2 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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" | |
0 | 38 |
39 // | |
40 // Forward Declarations | |
41 // | |
42 | |
43 class JvmtiEnv; | |
44 class JvmtiThreadState; | |
45 class JvmtiRawMonitor; // for jvmtiEnv.hpp | |
46 class JvmtiEventControllerPrivate; | |
47 class JvmtiTagMap; | |
48 | |
49 | |
50 | |
51 // One JvmtiEnv object is created per jvmti attachment; | |
52 // done via JNI GetEnv() call. Multiple attachments are | |
53 // allowed in jvmti. | |
54 | |
55 class JvmtiEnvBase : public CHeapObj { | |
56 | |
57 private: | |
58 | |
59 static JvmtiEnvBase* _head_environment; // head of environment list | |
60 | |
61 static bool _globally_initialized; | |
62 static jvmtiPhase _phase; | |
63 static volatile int _dying_thread_env_iteration_count; | |
64 | |
65 public: | |
66 | |
67 enum { | |
68 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */ | |
1988 | 69 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */ |
70 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 1 /* version: 1.2.1 */ | |
0 | 71 }; |
72 | |
73 static jvmtiPhase get_phase() { return _phase; } | |
74 static void set_phase(jvmtiPhase phase) { _phase = phase; } | |
75 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; } | |
76 | |
77 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; } | |
78 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; } | |
79 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; } | |
80 | |
81 private: | |
82 | |
83 enum { | |
84 JVMTI_MAGIC = 0x71EE, | |
85 DISPOSED_MAGIC = 0xDEFC, | |
86 BAD_MAGIC = 0xDEAD | |
87 }; | |
88 | |
89 jvmtiEnv _jvmti_external; | |
90 jint _magic; | |
1121 | 91 jint _version; // version value passed to JNI GetEnv() |
0 | 92 JvmtiEnvBase* _next; |
93 bool _is_retransformable; | |
94 const void *_env_local_storage; // per env agent allocated data. | |
95 jvmtiEventCallbacks _event_callbacks; | |
96 jvmtiExtEventCallbacks _ext_event_callbacks; | |
97 JvmtiTagMap* _tag_map; | |
98 JvmtiEnvEventEnable _env_event_enable; | |
99 jvmtiCapabilities _current_capabilities; | |
100 jvmtiCapabilities _prohibited_capabilities; | |
101 volatile bool _class_file_load_hook_ever_enabled; | |
102 static volatile bool _needs_clean_up; | |
103 char** _native_method_prefixes; | |
104 int _native_method_prefix_count; | |
105 | |
106 protected: | |
1121 | 107 JvmtiEnvBase(jint version); |
0 | 108 ~JvmtiEnvBase(); |
109 void dispose(); | |
110 void env_dispose(); | |
111 | |
112 void set_env_local_storage(const void* data) { _env_local_storage = data; } | |
113 const void* get_env_local_storage() { return _env_local_storage; } | |
114 | |
115 void record_class_file_load_hook_enabled(); | |
116 void record_first_time_class_file_load_hook_enabled(); | |
117 | |
118 char** get_native_method_prefixes() { return _native_method_prefixes; } | |
119 int get_native_method_prefix_count() { return _native_method_prefix_count; } | |
120 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes); | |
121 | |
122 private: | |
123 friend class JvmtiEventControllerPrivate; | |
124 void initialize(); | |
125 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks); | |
126 static void globally_initialize(); | |
127 static void periodic_clean_up(); | |
128 | |
129 friend class JvmtiEnvIterator; | |
130 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; } | |
131 void set_next_environment(JvmtiEnvBase* env) { _next = env; } | |
132 static JvmtiEnv* head_environment() { return (JvmtiEnv*)_head_environment; } | |
133 | |
134 public: | |
135 | |
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136 bool is_valid(); |
0 | 137 |
1121 | 138 bool use_version_1_0_semantics(); // agent asked for version 1.0 |
139 bool use_version_1_1_semantics(); // agent asked for version 1.1 | |
1988 | 140 bool use_version_1_2_semantics(); // agent asked for version 1.2 |
1121 | 141 |
0 | 142 bool is_retransformable() { return _is_retransformable; } |
143 | |
144 static ByteSize jvmti_external_offset() { | |
145 return byte_offset_of(JvmtiEnvBase, _jvmti_external); | |
146 }; | |
147 | |
148 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) { | |
149 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset())); | |
150 }; | |
151 | |
152 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; } | |
153 | |
154 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; } | |
155 | |
156 static char** get_all_native_method_prefixes(int* count_ptr); | |
157 | |
158 // This test will answer true when all environments have been disposed and some have | |
159 // not yet been deallocated. As a result, this test should only be used as an | |
160 // optimization for the no environment case. | |
161 static bool environments_might_exist() { | |
162 return head_environment() != NULL; | |
163 } | |
164 | |
165 static void check_for_periodic_clean_up(); | |
166 | |
167 JvmtiEnvEventEnable *env_event_enable() { | |
168 return &_env_event_enable; | |
169 } | |
170 | |
171 jvmtiError allocate(jlong size, unsigned char** mem_ptr) { | |
172 if (size < 0) { | |
173 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
174 } | |
175 if (size == 0) { | |
176 *mem_ptr = NULL; | |
177 } else { | |
178 *mem_ptr = (unsigned char *)os::malloc((size_t)size); | |
179 if (*mem_ptr == NULL) { | |
180 return JVMTI_ERROR_OUT_OF_MEMORY; | |
181 } | |
182 } | |
183 return JVMTI_ERROR_NONE; | |
184 } | |
185 | |
186 jvmtiError deallocate(unsigned char* mem) { | |
187 if (mem != NULL) { | |
188 os::free(mem); | |
189 } | |
190 return JVMTI_ERROR_NONE; | |
191 } | |
192 | |
193 | |
194 // Memory functions | |
195 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate | |
196 | |
197 // method to create a local handle | |
198 jobject jni_reference(Handle hndl) { | |
199 return JNIHandles::make_local(hndl()); | |
200 } | |
201 | |
202 // method to create a local handle. | |
203 // This function allows caller to specify which | |
204 // threads local handle table to use. | |
205 jobject jni_reference(JavaThread *thread, Handle hndl) { | |
206 return JNIHandles::make_local(thread, hndl()); | |
207 } | |
208 | |
209 // method to destroy a local handle | |
210 void destroy_jni_reference(jobject jobj) { | |
211 JNIHandles::destroy_local(jobj); | |
212 } | |
213 | |
214 // method to destroy a local handle. | |
215 // This function allows caller to specify which | |
216 // threads local handle table to use although currently it is | |
217 // not used. | |
218 void destroy_jni_reference(JavaThread *thread, jobject jobj) { | |
219 destroy_jni_reference(jobj); | |
220 } | |
221 | |
222 jvmtiEnv* jvmti_external() { return &_jvmti_external; }; | |
223 | |
224 // Event Dispatch | |
225 | |
226 bool has_callback(jvmtiEvent event_type) { | |
227 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL && | |
228 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking"); | |
229 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL; | |
230 } | |
231 | |
232 jvmtiEventCallbacks* callbacks() { | |
233 return &_event_callbacks; | |
234 } | |
235 | |
236 jvmtiExtEventCallbacks* ext_callbacks() { | |
237 return &_ext_event_callbacks; | |
238 } | |
239 | |
240 void set_tag_map(JvmtiTagMap* tag_map) { | |
241 _tag_map = tag_map; | |
242 } | |
243 | |
244 JvmtiTagMap* tag_map() { | |
245 return _tag_map; | |
246 } | |
247 | |
248 | |
249 // return true if event is enabled globally or for any thread | |
250 // True only if there is a callback for it. | |
251 bool is_enabled(jvmtiEvent event_type) { | |
252 return _env_event_enable.is_enabled(event_type); | |
253 } | |
254 | |
255 // Random Utilities | |
256 | |
257 protected: | |
258 // helper methods for creating arrays of global JNI Handles from local Handles | |
259 // allocated into environment specific storage | |
260 jobject * new_jobjectArray(int length, Handle *handles); | |
261 jthread * new_jthreadArray(int length, Handle *handles); | |
262 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles); | |
263 | |
264 // convert from JNIHandle to JavaThread * | |
265 JavaThread * get_JavaThread(jthread jni_thread); | |
266 | |
267 // convert to a jni jclass from a non-null klassOop | |
268 jclass get_jni_class_non_null(klassOop k); | |
269 | |
270 void update_klass_field_access_flag(fieldDescriptor *fd); | |
271 | |
272 jint count_locked_objects(JavaThread *java_thread, Handle hobj); | |
273 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread, | |
274 JavaThread* java_thread, | |
275 javaVFrame *jvf, | |
276 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, | |
277 jint depth); | |
278 vframe* vframeFor(JavaThread* java_thread, jint depth); | |
279 | |
280 public: | |
281 // get a field descriptor for the specified class and field | |
282 static bool get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd); | |
283 // test for suspend - most (all?) of these should go away | |
284 static bool is_thread_fully_suspended(JavaThread *thread, | |
285 bool wait_for_suspend, | |
286 uint32_t *bits); | |
287 | |
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 | |
334 // VM operation to get monitor information with stack depth. | |
335 class VM_GetOwnedMonitorInfo : public VM_Operation { | |
336 private: | |
337 JvmtiEnv *_env; | |
338 JavaThread* _calling_thread; | |
339 JavaThread *_java_thread; | |
340 jvmtiError _result; | |
341 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
342 | |
343 public: | |
344 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, | |
345 JavaThread* java_thread, | |
346 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { | |
347 _env = env; | |
348 _calling_thread = calling_thread; | |
349 _java_thread = java_thread; | |
350 _owned_monitors_list = owned_monitor_list; | |
351 _result = JVMTI_ERROR_NONE; | |
352 } | |
353 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } | |
354 void doit() { | |
355 ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, | |
356 _owned_monitors_list); | |
357 } | |
358 jvmtiError result() { return _result; } | |
359 }; | |
360 | |
361 | |
362 // VM operation to get object monitor usage. | |
363 class VM_GetObjectMonitorUsage : public VM_Operation { | |
364 private: | |
365 JvmtiEnv *_env; | |
366 jobject _object; | |
367 JavaThread* _calling_thread; | |
368 jvmtiMonitorUsage* _info_ptr; | |
369 jvmtiError _result; | |
370 | |
371 public: | |
372 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { | |
373 _env = env; | |
374 _object = object; | |
375 _calling_thread = calling_thread; | |
376 _info_ptr = info_ptr; | |
377 } | |
378 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } | |
379 jvmtiError result() { return _result; } | |
380 void doit() { | |
381 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); | |
382 } | |
383 | |
384 }; | |
385 | |
386 // VM operation to get current contended monitor. | |
387 class VM_GetCurrentContendedMonitor : public VM_Operation { | |
388 private: | |
389 JvmtiEnv *_env; | |
390 JavaThread *_calling_thread; | |
391 JavaThread *_java_thread; | |
392 jobject *_owned_monitor_ptr; | |
393 jvmtiError _result; | |
394 | |
395 public: | |
396 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { | |
397 _env = env; | |
398 _calling_thread = calling_thread; | |
399 _java_thread = java_thread; | |
400 _owned_monitor_ptr = mon_ptr; | |
401 } | |
402 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } | |
403 jvmtiError result() { return _result; } | |
404 void doit() { | |
405 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); | |
406 } | |
407 }; | |
408 | |
409 // VM operation to get stack trace at safepoint. | |
410 class VM_GetStackTrace : public VM_Operation { | |
411 private: | |
412 JvmtiEnv *_env; | |
413 JavaThread *_java_thread; | |
414 jint _start_depth; | |
415 jint _max_count; | |
416 jvmtiFrameInfo *_frame_buffer; | |
417 jint *_count_ptr; | |
418 jvmtiError _result; | |
419 | |
420 public: | |
421 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, | |
422 jint start_depth, jint max_count, | |
423 jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
424 _env = env; | |
425 _java_thread = java_thread; | |
426 _start_depth = start_depth; | |
427 _max_count = max_count; | |
428 _frame_buffer = frame_buffer; | |
429 _count_ptr = count_ptr; | |
430 } | |
431 jvmtiError result() { return _result; } | |
432 VMOp_Type type() const { return VMOp_GetStackTrace; } | |
433 void doit() { | |
434 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, | |
435 _start_depth, _max_count, | |
436 _frame_buffer, _count_ptr); | |
437 } | |
438 }; | |
439 | |
440 // forward declaration | |
441 struct StackInfoNode; | |
442 | |
443 // VM operation to get stack trace at safepoint. | |
444 class VM_GetMultipleStackTraces : public VM_Operation { | |
445 private: | |
446 JvmtiEnv *_env; | |
447 jint _max_frame_count; | |
448 jvmtiStackInfo *_stack_info; | |
449 jvmtiError _result; | |
450 int _frame_count_total; | |
451 struct StackInfoNode *_head; | |
452 | |
453 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } | |
454 jint max_frame_count() { return _max_frame_count; } | |
455 struct StackInfoNode *head() { return _head; } | |
456 void set_head(StackInfoNode *head) { _head = head; } | |
457 | |
458 protected: | |
459 void set_result(jvmtiError result) { _result = result; } | |
460 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); | |
461 void allocate_and_fill_stacks(jint thread_count); | |
462 | |
463 public: | |
464 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { | |
465 _env = env; | |
466 _max_frame_count = max_frame_count; | |
467 _frame_count_total = 0; | |
468 _head = NULL; | |
469 _result = JVMTI_ERROR_NONE; | |
470 } | |
471 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } | |
472 jvmtiStackInfo *stack_info() { return _stack_info; } | |
473 jvmtiError result() { return _result; } | |
474 }; | |
475 | |
476 | |
477 // VM operation to get stack trace at safepoint. | |
478 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { | |
479 private: | |
480 JavaThread *_calling_thread; | |
481 jint _final_thread_count; | |
482 | |
483 public: | |
484 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, | |
485 jint max_frame_count) | |
486 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
487 _calling_thread = calling_thread; | |
488 } | |
489 VMOp_Type type() const { return VMOp_GetAllStackTraces; } | |
490 void doit(); | |
491 jint final_thread_count() { return _final_thread_count; } | |
492 }; | |
493 | |
494 // VM operation to get stack trace at safepoint. | |
495 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { | |
496 private: | |
497 jint _thread_count; | |
498 const jthread* _thread_list; | |
499 | |
500 public: | |
501 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) | |
502 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
503 _thread_count = thread_count; | |
504 _thread_list = thread_list; | |
505 } | |
506 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } | |
507 void doit(); | |
508 }; | |
509 | |
510 | |
511 // VM operation to count stack frames at safepoint. | |
512 class VM_GetFrameCount : public VM_Operation { | |
513 private: | |
514 JvmtiEnv *_env; | |
515 JvmtiThreadState *_state; | |
516 jint *_count_ptr; | |
517 jvmtiError _result; | |
518 | |
519 public: | |
520 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { | |
521 _env = env; | |
522 _state = state; | |
523 _count_ptr = count_ptr; | |
524 } | |
525 VMOp_Type type() const { return VMOp_GetFrameCount; } | |
526 jvmtiError result() { return _result; } | |
527 void doit() { | |
528 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); | |
529 } | |
530 }; | |
531 | |
532 // VM operation to frame location at safepoint. | |
533 class VM_GetFrameLocation : public VM_Operation { | |
534 private: | |
535 JvmtiEnv *_env; | |
536 JavaThread* _java_thread; | |
537 jint _depth; | |
538 jmethodID* _method_ptr; | |
539 jlocation* _location_ptr; | |
540 jvmtiError _result; | |
541 | |
542 public: | |
543 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, | |
544 jmethodID* method_ptr, jlocation* location_ptr) { | |
545 _env = env; | |
546 _java_thread = java_thread; | |
547 _depth = depth; | |
548 _method_ptr = method_ptr; | |
549 _location_ptr = location_ptr; | |
550 } | |
551 VMOp_Type type() const { return VMOp_GetFrameLocation; } | |
552 jvmtiError result() { return _result; } | |
553 void doit() { | |
554 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, | |
555 _method_ptr, _location_ptr); | |
556 } | |
557 }; | |
558 | |
559 | |
560 // ResourceTracker | |
561 // | |
562 // ResourceTracker works a little like a ResourceMark. All allocates | |
563 // using the resource tracker are recorded. If an allocate using the | |
564 // resource tracker fails the destructor will free any resources | |
565 // that were allocated using the tracker. | |
566 // The motive for this class is to avoid messy error recovery code | |
567 // in situations where multiple allocations are done in sequence. If | |
568 // the second or subsequent allocation fails it avoids any code to | |
569 // release memory allocated in the previous calls. | |
570 // | |
571 // Usage :- | |
572 // ResourceTracker rt(env); | |
573 // : | |
574 // err = rt.allocate(1024, &ptr); | |
575 | |
576 class ResourceTracker : public StackObj { | |
577 private: | |
578 JvmtiEnv* _env; | |
579 GrowableArray<unsigned char*> *_allocations; | |
580 bool _failed; | |
581 public: | |
582 ResourceTracker(JvmtiEnv* env); | |
583 ~ResourceTracker(); | |
584 jvmtiError allocate(jlong size, unsigned char** mem_ptr); | |
585 unsigned char* allocate(jlong size); | |
586 char* strdup(const char* str); | |
587 }; | |
588 | |
589 | |
590 // Jvmti monitor closure to collect off stack monitors. | |
591 class JvmtiMonitorClosure: public MonitorClosure { | |
592 private: | |
593 JavaThread *_java_thread; | |
594 JavaThread *_calling_thread; | |
595 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
596 jvmtiError _error; | |
597 JvmtiEnvBase *_env; | |
598 | |
599 public: | |
600 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, | |
601 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, | |
602 JvmtiEnvBase *env) { | |
603 _java_thread = thread; | |
604 _calling_thread = calling_thread; | |
605 _owned_monitors_list = owned_monitors; | |
606 _error = JVMTI_ERROR_NONE; | |
607 _env = env; | |
608 } | |
609 void do_monitor(ObjectMonitor* mon); | |
610 jvmtiError error() { return _error;} | |
611 }; | |
612 | |
1972 | 613 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP |