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annotate src/share/vm/prims/jvmtiEnvBase.hpp @ 7666:31540ca73e81
Remove ControlFlowException in SimpleLanguage.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 01 Feb 2013 19:53:52 +0100 |
parents | 39556eae08af |
children | db9981fd3124 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2012, 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 | |
6197 | 55 class JvmtiEnvBase : public CHeapObj<mtInternal> { |
0 | 56 |
57 private: | |
58 | |
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59 #if INCLUDE_JVMTI |
0 | 60 static JvmtiEnvBase* _head_environment; // head of environment list |
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61 #endif // INCLUDE_JVMTI |
0 | 62 |
63 static bool _globally_initialized; | |
64 static jvmtiPhase _phase; | |
65 static volatile int _dying_thread_env_iteration_count; | |
66 | |
67 public: | |
68 | |
69 enum { | |
70 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */ | |
1988 | 71 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */ |
6919 | 72 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 2 /* version: 1.2.2 */ |
0 | 73 }; |
74 | |
75 static jvmtiPhase get_phase() { return _phase; } | |
76 static void set_phase(jvmtiPhase phase) { _phase = phase; } | |
77 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; } | |
78 | |
79 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; } | |
80 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; } | |
81 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; } | |
82 | |
83 private: | |
84 | |
85 enum { | |
86 JVMTI_MAGIC = 0x71EE, | |
87 DISPOSED_MAGIC = 0xDEFC, | |
88 BAD_MAGIC = 0xDEAD | |
89 }; | |
90 | |
91 jvmtiEnv _jvmti_external; | |
92 jint _magic; | |
1121 | 93 jint _version; // version value passed to JNI GetEnv() |
0 | 94 JvmtiEnvBase* _next; |
95 bool _is_retransformable; | |
96 const void *_env_local_storage; // per env agent allocated data. | |
97 jvmtiEventCallbacks _event_callbacks; | |
98 jvmtiExtEventCallbacks _ext_event_callbacks; | |
99 JvmtiTagMap* _tag_map; | |
100 JvmtiEnvEventEnable _env_event_enable; | |
101 jvmtiCapabilities _current_capabilities; | |
102 jvmtiCapabilities _prohibited_capabilities; | |
103 volatile bool _class_file_load_hook_ever_enabled; | |
104 static volatile bool _needs_clean_up; | |
105 char** _native_method_prefixes; | |
106 int _native_method_prefix_count; | |
107 | |
108 protected: | |
1121 | 109 JvmtiEnvBase(jint version); |
0 | 110 ~JvmtiEnvBase(); |
111 void dispose(); | |
112 void env_dispose(); | |
113 | |
114 void set_env_local_storage(const void* data) { _env_local_storage = data; } | |
115 const void* get_env_local_storage() { return _env_local_storage; } | |
116 | |
117 void record_class_file_load_hook_enabled(); | |
118 void record_first_time_class_file_load_hook_enabled(); | |
119 | |
120 char** get_native_method_prefixes() { return _native_method_prefixes; } | |
121 int get_native_method_prefix_count() { return _native_method_prefix_count; } | |
122 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes); | |
123 | |
124 private: | |
125 friend class JvmtiEventControllerPrivate; | |
126 void initialize(); | |
127 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks); | |
128 static void globally_initialize(); | |
129 static void periodic_clean_up(); | |
130 | |
131 friend class JvmtiEnvIterator; | |
132 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; } | |
133 void set_next_environment(JvmtiEnvBase* env) { _next = env; } | |
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134 static JvmtiEnv* head_environment() { |
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135 JVMTI_ONLY(return (JvmtiEnv*)_head_environment); |
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136 NOT_JVMTI(return NULL); |
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137 } |
0 | 138 |
139 public: | |
140 | |
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141 bool is_valid(); |
0 | 142 |
1121 | 143 bool use_version_1_0_semantics(); // agent asked for version 1.0 |
144 bool use_version_1_1_semantics(); // agent asked for version 1.1 | |
1988 | 145 bool use_version_1_2_semantics(); // agent asked for version 1.2 |
1121 | 146 |
0 | 147 bool is_retransformable() { return _is_retransformable; } |
148 | |
149 static ByteSize jvmti_external_offset() { | |
150 return byte_offset_of(JvmtiEnvBase, _jvmti_external); | |
151 }; | |
152 | |
153 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) { | |
154 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset())); | |
155 }; | |
156 | |
157 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; } | |
158 | |
159 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; } | |
160 | |
161 static char** get_all_native_method_prefixes(int* count_ptr); | |
162 | |
163 // This test will answer true when all environments have been disposed and some have | |
164 // not yet been deallocated. As a result, this test should only be used as an | |
165 // optimization for the no environment case. | |
166 static bool environments_might_exist() { | |
167 return head_environment() != NULL; | |
168 } | |
169 | |
170 static void check_for_periodic_clean_up(); | |
171 | |
172 JvmtiEnvEventEnable *env_event_enable() { | |
173 return &_env_event_enable; | |
174 } | |
175 | |
176 jvmtiError allocate(jlong size, unsigned char** mem_ptr) { | |
177 if (size < 0) { | |
178 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
179 } | |
180 if (size == 0) { | |
181 *mem_ptr = NULL; | |
182 } else { | |
6197 | 183 *mem_ptr = (unsigned char *)os::malloc((size_t)size, mtInternal); |
0 | 184 if (*mem_ptr == NULL) { |
185 return JVMTI_ERROR_OUT_OF_MEMORY; | |
186 } | |
187 } | |
188 return JVMTI_ERROR_NONE; | |
189 } | |
190 | |
191 jvmtiError deallocate(unsigned char* mem) { | |
192 if (mem != NULL) { | |
6197 | 193 os::free(mem, mtInternal); |
0 | 194 } |
195 return JVMTI_ERROR_NONE; | |
196 } | |
197 | |
198 | |
199 // Memory functions | |
200 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate | |
201 | |
202 // method to create a local handle | |
203 jobject jni_reference(Handle hndl) { | |
204 return JNIHandles::make_local(hndl()); | |
205 } | |
206 | |
207 // method to create a local handle. | |
208 // This function allows caller to specify which | |
209 // threads local handle table to use. | |
210 jobject jni_reference(JavaThread *thread, Handle hndl) { | |
211 return JNIHandles::make_local(thread, hndl()); | |
212 } | |
213 | |
214 // method to destroy a local handle | |
215 void destroy_jni_reference(jobject jobj) { | |
216 JNIHandles::destroy_local(jobj); | |
217 } | |
218 | |
219 // method to destroy a local handle. | |
220 // This function allows caller to specify which | |
221 // threads local handle table to use although currently it is | |
222 // not used. | |
223 void destroy_jni_reference(JavaThread *thread, jobject jobj) { | |
224 destroy_jni_reference(jobj); | |
225 } | |
226 | |
227 jvmtiEnv* jvmti_external() { return &_jvmti_external; }; | |
228 | |
229 // Event Dispatch | |
230 | |
231 bool has_callback(jvmtiEvent event_type) { | |
232 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL && | |
233 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking"); | |
234 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL; | |
235 } | |
236 | |
237 jvmtiEventCallbacks* callbacks() { | |
238 return &_event_callbacks; | |
239 } | |
240 | |
241 jvmtiExtEventCallbacks* ext_callbacks() { | |
242 return &_ext_event_callbacks; | |
243 } | |
244 | |
245 void set_tag_map(JvmtiTagMap* tag_map) { | |
246 _tag_map = tag_map; | |
247 } | |
248 | |
249 JvmtiTagMap* tag_map() { | |
250 return _tag_map; | |
251 } | |
252 | |
253 | |
254 // return true if event is enabled globally or for any thread | |
255 // True only if there is a callback for it. | |
256 bool is_enabled(jvmtiEvent event_type) { | |
257 return _env_event_enable.is_enabled(event_type); | |
258 } | |
259 | |
260 // Random Utilities | |
261 | |
262 protected: | |
263 // helper methods for creating arrays of global JNI Handles from local Handles | |
264 // allocated into environment specific storage | |
265 jobject * new_jobjectArray(int length, Handle *handles); | |
266 jthread * new_jthreadArray(int length, Handle *handles); | |
267 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles); | |
268 | |
269 // convert from JNIHandle to JavaThread * | |
270 JavaThread * get_JavaThread(jthread jni_thread); | |
271 | |
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272 // convert to a jni jclass from a non-null Klass* |
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273 jclass get_jni_class_non_null(Klass* k); |
0 | 274 |
275 jint count_locked_objects(JavaThread *java_thread, Handle hobj); | |
276 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread, | |
277 JavaThread* java_thread, | |
278 javaVFrame *jvf, | |
279 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, | |
280 jint depth); | |
281 vframe* vframeFor(JavaThread* java_thread, jint depth); | |
282 | |
283 public: | |
284 // get a field descriptor for the specified class and field | |
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285 static bool get_field_descriptor(Klass* k, jfieldID field, fieldDescriptor* fd); |
0 | 286 // test for suspend - most (all?) of these should go away |
287 static bool is_thread_fully_suspended(JavaThread *thread, | |
288 bool wait_for_suspend, | |
289 uint32_t *bits); | |
290 | |
291 | |
292 // JVMTI API helper functions which are called at safepoint or thread is suspended. | |
293 jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr); | |
294 jvmtiError get_frame_location(JavaThread* java_thread, jint depth, | |
295 jmethodID* method_ptr, jlocation* location_ptr); | |
296 jvmtiError get_object_monitor_usage(JavaThread *calling_thread, | |
297 jobject object, jvmtiMonitorUsage* info_ptr); | |
298 jvmtiError get_stack_trace(JavaThread *java_thread, | |
299 jint stack_depth, jint max_count, | |
300 jvmtiFrameInfo* frame_buffer, jint* count_ptr); | |
301 jvmtiError get_current_contended_monitor(JavaThread *calling_thread, | |
302 JavaThread *java_thread, | |
303 jobject *monitor_ptr); | |
304 jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread, | |
305 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list); | |
306 jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread, | |
307 jvalue value, TosState tos, Handle* ret_ob_h); | |
308 jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos); | |
309 }; | |
310 | |
311 // This class is the only safe means of iterating through environments. | |
312 // Note that this iteratation includes invalid environments pending | |
313 // deallocation -- in fact, some uses depend on this behavior. | |
314 | |
315 class JvmtiEnvIterator : public StackObj { | |
316 private: | |
317 bool _entry_was_marked; | |
318 public: | |
319 JvmtiEnvIterator() { | |
320 if (Threads::number_of_threads() == 0) { | |
321 _entry_was_marked = false; // we are single-threaded, no need | |
322 } else { | |
323 Thread::current()->entering_jvmti_env_iteration(); | |
324 _entry_was_marked = true; | |
325 } | |
326 } | |
327 ~JvmtiEnvIterator() { | |
328 if (_entry_was_marked) { | |
329 Thread::current()->leaving_jvmti_env_iteration(); | |
330 } | |
331 } | |
332 JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); } | |
333 JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); } | |
334 }; | |
335 | |
336 | |
337 // VM operation to get monitor information with stack depth. | |
338 class VM_GetOwnedMonitorInfo : public VM_Operation { | |
339 private: | |
340 JvmtiEnv *_env; | |
341 JavaThread* _calling_thread; | |
342 JavaThread *_java_thread; | |
343 jvmtiError _result; | |
344 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
345 | |
346 public: | |
347 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, | |
348 JavaThread* java_thread, | |
349 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { | |
350 _env = env; | |
351 _calling_thread = calling_thread; | |
352 _java_thread = java_thread; | |
353 _owned_monitors_list = owned_monitor_list; | |
354 _result = JVMTI_ERROR_NONE; | |
355 } | |
356 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } | |
357 void doit() { | |
358 ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, | |
359 _owned_monitors_list); | |
360 } | |
361 jvmtiError result() { return _result; } | |
362 }; | |
363 | |
364 | |
365 // VM operation to get object monitor usage. | |
366 class VM_GetObjectMonitorUsage : public VM_Operation { | |
367 private: | |
368 JvmtiEnv *_env; | |
369 jobject _object; | |
370 JavaThread* _calling_thread; | |
371 jvmtiMonitorUsage* _info_ptr; | |
372 jvmtiError _result; | |
373 | |
374 public: | |
375 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { | |
376 _env = env; | |
377 _object = object; | |
378 _calling_thread = calling_thread; | |
379 _info_ptr = info_ptr; | |
380 } | |
381 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } | |
382 jvmtiError result() { return _result; } | |
383 void doit() { | |
384 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); | |
385 } | |
386 | |
387 }; | |
388 | |
389 // VM operation to get current contended monitor. | |
390 class VM_GetCurrentContendedMonitor : public VM_Operation { | |
391 private: | |
392 JvmtiEnv *_env; | |
393 JavaThread *_calling_thread; | |
394 JavaThread *_java_thread; | |
395 jobject *_owned_monitor_ptr; | |
396 jvmtiError _result; | |
397 | |
398 public: | |
399 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { | |
400 _env = env; | |
401 _calling_thread = calling_thread; | |
402 _java_thread = java_thread; | |
403 _owned_monitor_ptr = mon_ptr; | |
404 } | |
405 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } | |
406 jvmtiError result() { return _result; } | |
407 void doit() { | |
408 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); | |
409 } | |
410 }; | |
411 | |
412 // VM operation to get stack trace at safepoint. | |
413 class VM_GetStackTrace : public VM_Operation { | |
414 private: | |
415 JvmtiEnv *_env; | |
416 JavaThread *_java_thread; | |
417 jint _start_depth; | |
418 jint _max_count; | |
419 jvmtiFrameInfo *_frame_buffer; | |
420 jint *_count_ptr; | |
421 jvmtiError _result; | |
422 | |
423 public: | |
424 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, | |
425 jint start_depth, jint max_count, | |
426 jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
427 _env = env; | |
428 _java_thread = java_thread; | |
429 _start_depth = start_depth; | |
430 _max_count = max_count; | |
431 _frame_buffer = frame_buffer; | |
432 _count_ptr = count_ptr; | |
433 } | |
434 jvmtiError result() { return _result; } | |
435 VMOp_Type type() const { return VMOp_GetStackTrace; } | |
436 void doit() { | |
437 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, | |
438 _start_depth, _max_count, | |
439 _frame_buffer, _count_ptr); | |
440 } | |
441 }; | |
442 | |
443 // forward declaration | |
444 struct StackInfoNode; | |
445 | |
446 // VM operation to get stack trace at safepoint. | |
447 class VM_GetMultipleStackTraces : public VM_Operation { | |
448 private: | |
449 JvmtiEnv *_env; | |
450 jint _max_frame_count; | |
451 jvmtiStackInfo *_stack_info; | |
452 jvmtiError _result; | |
453 int _frame_count_total; | |
454 struct StackInfoNode *_head; | |
455 | |
456 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } | |
457 jint max_frame_count() { return _max_frame_count; } | |
458 struct StackInfoNode *head() { return _head; } | |
459 void set_head(StackInfoNode *head) { _head = head; } | |
460 | |
461 protected: | |
462 void set_result(jvmtiError result) { _result = result; } | |
463 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); | |
464 void allocate_and_fill_stacks(jint thread_count); | |
465 | |
466 public: | |
467 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { | |
468 _env = env; | |
469 _max_frame_count = max_frame_count; | |
470 _frame_count_total = 0; | |
471 _head = NULL; | |
472 _result = JVMTI_ERROR_NONE; | |
473 } | |
474 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } | |
475 jvmtiStackInfo *stack_info() { return _stack_info; } | |
476 jvmtiError result() { return _result; } | |
477 }; | |
478 | |
479 | |
480 // VM operation to get stack trace at safepoint. | |
481 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { | |
482 private: | |
483 JavaThread *_calling_thread; | |
484 jint _final_thread_count; | |
485 | |
486 public: | |
487 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, | |
488 jint max_frame_count) | |
489 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
490 _calling_thread = calling_thread; | |
491 } | |
492 VMOp_Type type() const { return VMOp_GetAllStackTraces; } | |
493 void doit(); | |
494 jint final_thread_count() { return _final_thread_count; } | |
495 }; | |
496 | |
497 // VM operation to get stack trace at safepoint. | |
498 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { | |
499 private: | |
500 jint _thread_count; | |
501 const jthread* _thread_list; | |
502 | |
503 public: | |
504 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) | |
505 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
506 _thread_count = thread_count; | |
507 _thread_list = thread_list; | |
508 } | |
509 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } | |
510 void doit(); | |
511 }; | |
512 | |
513 | |
514 // VM operation to count stack frames at safepoint. | |
515 class VM_GetFrameCount : public VM_Operation { | |
516 private: | |
517 JvmtiEnv *_env; | |
518 JvmtiThreadState *_state; | |
519 jint *_count_ptr; | |
520 jvmtiError _result; | |
521 | |
522 public: | |
523 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { | |
524 _env = env; | |
525 _state = state; | |
526 _count_ptr = count_ptr; | |
527 } | |
528 VMOp_Type type() const { return VMOp_GetFrameCount; } | |
529 jvmtiError result() { return _result; } | |
530 void doit() { | |
531 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); | |
532 } | |
533 }; | |
534 | |
535 // VM operation to frame location at safepoint. | |
536 class VM_GetFrameLocation : public VM_Operation { | |
537 private: | |
538 JvmtiEnv *_env; | |
539 JavaThread* _java_thread; | |
540 jint _depth; | |
541 jmethodID* _method_ptr; | |
542 jlocation* _location_ptr; | |
543 jvmtiError _result; | |
544 | |
545 public: | |
546 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, | |
547 jmethodID* method_ptr, jlocation* location_ptr) { | |
548 _env = env; | |
549 _java_thread = java_thread; | |
550 _depth = depth; | |
551 _method_ptr = method_ptr; | |
552 _location_ptr = location_ptr; | |
553 } | |
554 VMOp_Type type() const { return VMOp_GetFrameLocation; } | |
555 jvmtiError result() { return _result; } | |
556 void doit() { | |
557 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, | |
558 _method_ptr, _location_ptr); | |
559 } | |
560 }; | |
561 | |
562 | |
563 // ResourceTracker | |
564 // | |
565 // ResourceTracker works a little like a ResourceMark. All allocates | |
566 // using the resource tracker are recorded. If an allocate using the | |
567 // resource tracker fails the destructor will free any resources | |
568 // that were allocated using the tracker. | |
569 // The motive for this class is to avoid messy error recovery code | |
570 // in situations where multiple allocations are done in sequence. If | |
571 // the second or subsequent allocation fails it avoids any code to | |
572 // release memory allocated in the previous calls. | |
573 // | |
574 // Usage :- | |
575 // ResourceTracker rt(env); | |
576 // : | |
577 // err = rt.allocate(1024, &ptr); | |
578 | |
579 class ResourceTracker : public StackObj { | |
580 private: | |
581 JvmtiEnv* _env; | |
582 GrowableArray<unsigned char*> *_allocations; | |
583 bool _failed; | |
584 public: | |
585 ResourceTracker(JvmtiEnv* env); | |
586 ~ResourceTracker(); | |
587 jvmtiError allocate(jlong size, unsigned char** mem_ptr); | |
588 unsigned char* allocate(jlong size); | |
589 char* strdup(const char* str); | |
590 }; | |
591 | |
592 | |
593 // Jvmti monitor closure to collect off stack monitors. | |
594 class JvmtiMonitorClosure: public MonitorClosure { | |
595 private: | |
596 JavaThread *_java_thread; | |
597 JavaThread *_calling_thread; | |
598 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
599 jvmtiError _error; | |
600 JvmtiEnvBase *_env; | |
601 | |
602 public: | |
603 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, | |
604 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, | |
605 JvmtiEnvBase *env) { | |
606 _java_thread = thread; | |
607 _calling_thread = calling_thread; | |
608 _owned_monitors_list = owned_monitors; | |
609 _error = JVMTI_ERROR_NONE; | |
610 _env = env; | |
611 } | |
612 void do_monitor(ObjectMonitor* mon); | |
613 jvmtiError error() { return _error;} | |
614 }; | |
615 | |
1972 | 616 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP |