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annotate src/share/vm/prims/jvmtiEnvBase.hpp @ 11722:ff05c78a7f64
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author | Christian Wirth <christian.wirth@oracle.com> |
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date | Thu, 19 Sep 2013 10:36:56 +0200 |
parents | db9981fd3124 |
children | c1d7040a1183 |
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 * | |
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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" | |
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38 #include "utilities/macros.hpp" |
0 | 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 | |
6197 | 56 class JvmtiEnvBase : public CHeapObj<mtInternal> { |
0 | 57 |
58 private: | |
59 | |
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60 #if INCLUDE_JVMTI |
0 | 61 static JvmtiEnvBase* _head_environment; // head of environment list |
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62 #endif // INCLUDE_JVMTI |
0 | 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 */ | |
1988 | 72 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */ |
6919 | 73 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 2 /* version: 1.2.2 */ |
0 | 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; | |
1121 | 94 jint _version; // version value passed to JNI GetEnv() |
0 | 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: | |
1121 | 110 JvmtiEnvBase(jint version); |
0 | 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; } | |
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135 static JvmtiEnv* head_environment() { |
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136 JVMTI_ONLY(return (JvmtiEnv*)_head_environment); |
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137 NOT_JVMTI(return NULL); |
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138 } |
0 | 139 |
140 public: | |
141 | |
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142 bool is_valid(); |
0 | 143 |
1121 | 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 | |
1988 | 146 bool use_version_1_2_semantics(); // agent asked for version 1.2 |
1121 | 147 |
0 | 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 { | |
6197 | 184 *mem_ptr = (unsigned char *)os::malloc((size_t)size, mtInternal); |
0 | 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) { | |
6197 | 194 os::free(mem, mtInternal); |
0 | 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 | |
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273 // convert to a jni jclass from a non-null Klass* |
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274 jclass get_jni_class_non_null(Klass* k); |
0 | 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 | |
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286 static bool get_field_descriptor(Klass* k, jfieldID field, fieldDescriptor* fd); |
0 | 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 | |
338 // VM operation to get monitor information with stack depth. | |
339 class VM_GetOwnedMonitorInfo : public VM_Operation { | |
340 private: | |
341 JvmtiEnv *_env; | |
342 JavaThread* _calling_thread; | |
343 JavaThread *_java_thread; | |
344 jvmtiError _result; | |
345 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
346 | |
347 public: | |
348 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, | |
349 JavaThread* java_thread, | |
350 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { | |
351 _env = env; | |
352 _calling_thread = calling_thread; | |
353 _java_thread = java_thread; | |
354 _owned_monitors_list = owned_monitor_list; | |
355 _result = JVMTI_ERROR_NONE; | |
356 } | |
357 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } | |
358 void doit() { | |
359 ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, | |
360 _owned_monitors_list); | |
361 } | |
362 jvmtiError result() { return _result; } | |
363 }; | |
364 | |
365 | |
366 // VM operation to get object monitor usage. | |
367 class VM_GetObjectMonitorUsage : public VM_Operation { | |
368 private: | |
369 JvmtiEnv *_env; | |
370 jobject _object; | |
371 JavaThread* _calling_thread; | |
372 jvmtiMonitorUsage* _info_ptr; | |
373 jvmtiError _result; | |
374 | |
375 public: | |
376 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { | |
377 _env = env; | |
378 _object = object; | |
379 _calling_thread = calling_thread; | |
380 _info_ptr = info_ptr; | |
381 } | |
382 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } | |
383 jvmtiError result() { return _result; } | |
384 void doit() { | |
385 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); | |
386 } | |
387 | |
388 }; | |
389 | |
390 // VM operation to get current contended monitor. | |
391 class VM_GetCurrentContendedMonitor : public VM_Operation { | |
392 private: | |
393 JvmtiEnv *_env; | |
394 JavaThread *_calling_thread; | |
395 JavaThread *_java_thread; | |
396 jobject *_owned_monitor_ptr; | |
397 jvmtiError _result; | |
398 | |
399 public: | |
400 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { | |
401 _env = env; | |
402 _calling_thread = calling_thread; | |
403 _java_thread = java_thread; | |
404 _owned_monitor_ptr = mon_ptr; | |
405 } | |
406 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } | |
407 jvmtiError result() { return _result; } | |
408 void doit() { | |
409 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); | |
410 } | |
411 }; | |
412 | |
413 // VM operation to get stack trace at safepoint. | |
414 class VM_GetStackTrace : public VM_Operation { | |
415 private: | |
416 JvmtiEnv *_env; | |
417 JavaThread *_java_thread; | |
418 jint _start_depth; | |
419 jint _max_count; | |
420 jvmtiFrameInfo *_frame_buffer; | |
421 jint *_count_ptr; | |
422 jvmtiError _result; | |
423 | |
424 public: | |
425 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, | |
426 jint start_depth, jint max_count, | |
427 jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
428 _env = env; | |
429 _java_thread = java_thread; | |
430 _start_depth = start_depth; | |
431 _max_count = max_count; | |
432 _frame_buffer = frame_buffer; | |
433 _count_ptr = count_ptr; | |
434 } | |
435 jvmtiError result() { return _result; } | |
436 VMOp_Type type() const { return VMOp_GetStackTrace; } | |
437 void doit() { | |
438 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, | |
439 _start_depth, _max_count, | |
440 _frame_buffer, _count_ptr); | |
441 } | |
442 }; | |
443 | |
444 // forward declaration | |
445 struct StackInfoNode; | |
446 | |
447 // VM operation to get stack trace at safepoint. | |
448 class VM_GetMultipleStackTraces : public VM_Operation { | |
449 private: | |
450 JvmtiEnv *_env; | |
451 jint _max_frame_count; | |
452 jvmtiStackInfo *_stack_info; | |
453 jvmtiError _result; | |
454 int _frame_count_total; | |
455 struct StackInfoNode *_head; | |
456 | |
457 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } | |
458 jint max_frame_count() { return _max_frame_count; } | |
459 struct StackInfoNode *head() { return _head; } | |
460 void set_head(StackInfoNode *head) { _head = head; } | |
461 | |
462 protected: | |
463 void set_result(jvmtiError result) { _result = result; } | |
464 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); | |
465 void allocate_and_fill_stacks(jint thread_count); | |
466 | |
467 public: | |
468 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { | |
469 _env = env; | |
470 _max_frame_count = max_frame_count; | |
471 _frame_count_total = 0; | |
472 _head = NULL; | |
473 _result = JVMTI_ERROR_NONE; | |
474 } | |
475 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } | |
476 jvmtiStackInfo *stack_info() { return _stack_info; } | |
477 jvmtiError result() { return _result; } | |
478 }; | |
479 | |
480 | |
481 // VM operation to get stack trace at safepoint. | |
482 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { | |
483 private: | |
484 JavaThread *_calling_thread; | |
485 jint _final_thread_count; | |
486 | |
487 public: | |
488 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, | |
489 jint max_frame_count) | |
490 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
491 _calling_thread = calling_thread; | |
492 } | |
493 VMOp_Type type() const { return VMOp_GetAllStackTraces; } | |
494 void doit(); | |
495 jint final_thread_count() { return _final_thread_count; } | |
496 }; | |
497 | |
498 // VM operation to get stack trace at safepoint. | |
499 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { | |
500 private: | |
501 jint _thread_count; | |
502 const jthread* _thread_list; | |
503 | |
504 public: | |
505 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) | |
506 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
507 _thread_count = thread_count; | |
508 _thread_list = thread_list; | |
509 } | |
510 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } | |
511 void doit(); | |
512 }; | |
513 | |
514 | |
515 // VM operation to count stack frames at safepoint. | |
516 class VM_GetFrameCount : public VM_Operation { | |
517 private: | |
518 JvmtiEnv *_env; | |
519 JvmtiThreadState *_state; | |
520 jint *_count_ptr; | |
521 jvmtiError _result; | |
522 | |
523 public: | |
524 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { | |
525 _env = env; | |
526 _state = state; | |
527 _count_ptr = count_ptr; | |
528 } | |
529 VMOp_Type type() const { return VMOp_GetFrameCount; } | |
530 jvmtiError result() { return _result; } | |
531 void doit() { | |
532 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); | |
533 } | |
534 }; | |
535 | |
536 // VM operation to frame location at safepoint. | |
537 class VM_GetFrameLocation : public VM_Operation { | |
538 private: | |
539 JvmtiEnv *_env; | |
540 JavaThread* _java_thread; | |
541 jint _depth; | |
542 jmethodID* _method_ptr; | |
543 jlocation* _location_ptr; | |
544 jvmtiError _result; | |
545 | |
546 public: | |
547 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, | |
548 jmethodID* method_ptr, jlocation* location_ptr) { | |
549 _env = env; | |
550 _java_thread = java_thread; | |
551 _depth = depth; | |
552 _method_ptr = method_ptr; | |
553 _location_ptr = location_ptr; | |
554 } | |
555 VMOp_Type type() const { return VMOp_GetFrameLocation; } | |
556 jvmtiError result() { return _result; } | |
557 void doit() { | |
558 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, | |
559 _method_ptr, _location_ptr); | |
560 } | |
561 }; | |
562 | |
563 | |
564 // ResourceTracker | |
565 // | |
566 // ResourceTracker works a little like a ResourceMark. All allocates | |
567 // using the resource tracker are recorded. If an allocate using the | |
568 // resource tracker fails the destructor will free any resources | |
569 // that were allocated using the tracker. | |
570 // The motive for this class is to avoid messy error recovery code | |
571 // in situations where multiple allocations are done in sequence. If | |
572 // the second or subsequent allocation fails it avoids any code to | |
573 // release memory allocated in the previous calls. | |
574 // | |
575 // Usage :- | |
576 // ResourceTracker rt(env); | |
577 // : | |
578 // err = rt.allocate(1024, &ptr); | |
579 | |
580 class ResourceTracker : public StackObj { | |
581 private: | |
582 JvmtiEnv* _env; | |
583 GrowableArray<unsigned char*> *_allocations; | |
584 bool _failed; | |
585 public: | |
586 ResourceTracker(JvmtiEnv* env); | |
587 ~ResourceTracker(); | |
588 jvmtiError allocate(jlong size, unsigned char** mem_ptr); | |
589 unsigned char* allocate(jlong size); | |
590 char* strdup(const char* str); | |
591 }; | |
592 | |
593 | |
594 // Jvmti monitor closure to collect off stack monitors. | |
595 class JvmtiMonitorClosure: public MonitorClosure { | |
596 private: | |
597 JavaThread *_java_thread; | |
598 JavaThread *_calling_thread; | |
599 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
600 jvmtiError _error; | |
601 JvmtiEnvBase *_env; | |
602 | |
603 public: | |
604 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, | |
605 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, | |
606 JvmtiEnvBase *env) { | |
607 _java_thread = thread; | |
608 _calling_thread = calling_thread; | |
609 _owned_monitors_list = owned_monitors; | |
610 _error = JVMTI_ERROR_NONE; | |
611 _env = env; | |
612 } | |
613 void do_monitor(ObjectMonitor* mon); | |
614 jvmtiError error() { return _error;} | |
615 }; | |
616 | |
1972 | 617 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP |