Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiEnvBase.hpp @ 1122:dcb15a6f342d
Merge
| author | dcubed |
|---|---|
| date | Mon, 14 Dec 2009 13:26:29 -0700 |
| parents | 2f716c0acb64 98cd9901c161 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1121 | 2 * Copyright 2003-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef _JAVA_JVMTIENVBASE_H_ | |
| 26 #define _JAVA_JVMTIENVBASE_H_ | |
| 27 | |
| 28 // | |
| 29 // Forward Declarations | |
| 30 // | |
| 31 | |
| 32 class JvmtiEnv; | |
| 33 class JvmtiThreadState; | |
| 34 class JvmtiRawMonitor; // for jvmtiEnv.hpp | |
| 35 class JvmtiEventControllerPrivate; | |
| 36 class JvmtiTagMap; | |
| 37 | |
| 38 | |
| 39 | |
| 40 // One JvmtiEnv object is created per jvmti attachment; | |
| 41 // done via JNI GetEnv() call. Multiple attachments are | |
| 42 // allowed in jvmti. | |
| 43 | |
| 44 class JvmtiEnvBase : public CHeapObj { | |
| 45 | |
| 46 private: | |
| 47 | |
| 48 static JvmtiEnvBase* _head_environment; // head of environment list | |
| 49 | |
| 50 static bool _globally_initialized; | |
| 51 static jvmtiPhase _phase; | |
| 52 static volatile int _dying_thread_env_iteration_count; | |
| 53 | |
| 54 public: | |
| 55 | |
| 56 enum { | |
| 57 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */ | |
| 58 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102 /* version: 1.1.102 */ | |
| 59 }; | |
| 60 | |
| 61 static jvmtiPhase get_phase() { return _phase; } | |
| 62 static void set_phase(jvmtiPhase phase) { _phase = phase; } | |
| 63 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; } | |
| 64 | |
| 65 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; } | |
| 66 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; } | |
| 67 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; } | |
| 68 | |
| 69 private: | |
| 70 | |
| 71 enum { | |
| 72 JVMTI_MAGIC = 0x71EE, | |
| 73 DISPOSED_MAGIC = 0xDEFC, | |
| 74 BAD_MAGIC = 0xDEAD | |
| 75 }; | |
| 76 | |
| 77 jvmtiEnv _jvmti_external; | |
| 78 jint _magic; | |
| 1121 | 79 jint _version; // version value passed to JNI GetEnv() |
| 0 | 80 JvmtiEnvBase* _next; |
| 81 bool _is_retransformable; | |
| 82 const void *_env_local_storage; // per env agent allocated data. | |
| 83 jvmtiEventCallbacks _event_callbacks; | |
| 84 jvmtiExtEventCallbacks _ext_event_callbacks; | |
| 85 JvmtiTagMap* _tag_map; | |
| 86 JvmtiEnvEventEnable _env_event_enable; | |
| 87 jvmtiCapabilities _current_capabilities; | |
| 88 jvmtiCapabilities _prohibited_capabilities; | |
| 89 volatile bool _class_file_load_hook_ever_enabled; | |
| 90 static volatile bool _needs_clean_up; | |
| 91 char** _native_method_prefixes; | |
| 92 int _native_method_prefix_count; | |
| 93 | |
| 94 protected: | |
| 1121 | 95 JvmtiEnvBase(jint version); |
| 0 | 96 ~JvmtiEnvBase(); |
| 97 void dispose(); | |
| 98 void env_dispose(); | |
| 99 | |
| 100 void set_env_local_storage(const void* data) { _env_local_storage = data; } | |
| 101 const void* get_env_local_storage() { return _env_local_storage; } | |
| 102 | |
| 103 void record_class_file_load_hook_enabled(); | |
| 104 void record_first_time_class_file_load_hook_enabled(); | |
| 105 | |
| 106 char** get_native_method_prefixes() { return _native_method_prefixes; } | |
| 107 int get_native_method_prefix_count() { return _native_method_prefix_count; } | |
| 108 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes); | |
| 109 | |
| 110 private: | |
| 111 friend class JvmtiEventControllerPrivate; | |
| 112 void initialize(); | |
| 113 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks); | |
| 114 static void globally_initialize(); | |
| 115 static void periodic_clean_up(); | |
| 116 | |
| 117 friend class JvmtiEnvIterator; | |
| 118 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; } | |
| 119 void set_next_environment(JvmtiEnvBase* env) { _next = env; } | |
| 120 static JvmtiEnv* head_environment() { return (JvmtiEnv*)_head_environment; } | |
| 121 | |
| 122 public: | |
| 123 | |
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124 bool is_valid(); |
| 0 | 125 |
| 1121 | 126 bool use_version_1_0_semantics(); // agent asked for version 1.0 |
| 127 bool use_version_1_1_semantics(); // agent asked for version 1.1 | |
| 128 | |
| 0 | 129 bool is_retransformable() { return _is_retransformable; } |
| 130 | |
| 131 static ByteSize jvmti_external_offset() { | |
| 132 return byte_offset_of(JvmtiEnvBase, _jvmti_external); | |
| 133 }; | |
| 134 | |
| 135 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) { | |
| 136 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset())); | |
| 137 }; | |
| 138 | |
| 139 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; } | |
| 140 | |
| 141 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; } | |
| 142 | |
| 143 static char** get_all_native_method_prefixes(int* count_ptr); | |
| 144 | |
| 145 // This test will answer true when all environments have been disposed and some have | |
| 146 // not yet been deallocated. As a result, this test should only be used as an | |
| 147 // optimization for the no environment case. | |
| 148 static bool environments_might_exist() { | |
| 149 return head_environment() != NULL; | |
| 150 } | |
| 151 | |
| 152 static void check_for_periodic_clean_up(); | |
| 153 | |
| 154 JvmtiEnvEventEnable *env_event_enable() { | |
| 155 return &_env_event_enable; | |
| 156 } | |
| 157 | |
| 158 jvmtiError allocate(jlong size, unsigned char** mem_ptr) { | |
| 159 if (size < 0) { | |
| 160 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
| 161 } | |
| 162 if (size == 0) { | |
| 163 *mem_ptr = NULL; | |
| 164 } else { | |
| 165 *mem_ptr = (unsigned char *)os::malloc((size_t)size); | |
| 166 if (*mem_ptr == NULL) { | |
| 167 return JVMTI_ERROR_OUT_OF_MEMORY; | |
| 168 } | |
| 169 } | |
| 170 return JVMTI_ERROR_NONE; | |
| 171 } | |
| 172 | |
| 173 jvmtiError deallocate(unsigned char* mem) { | |
| 174 if (mem != NULL) { | |
| 175 os::free(mem); | |
| 176 } | |
| 177 return JVMTI_ERROR_NONE; | |
| 178 } | |
| 179 | |
| 180 | |
| 181 // Memory functions | |
| 182 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate | |
| 183 | |
| 184 // method to create a local handle | |
| 185 jobject jni_reference(Handle hndl) { | |
| 186 return JNIHandles::make_local(hndl()); | |
| 187 } | |
| 188 | |
| 189 // method to create a local handle. | |
| 190 // This function allows caller to specify which | |
| 191 // threads local handle table to use. | |
| 192 jobject jni_reference(JavaThread *thread, Handle hndl) { | |
| 193 return JNIHandles::make_local(thread, hndl()); | |
| 194 } | |
| 195 | |
| 196 // method to destroy a local handle | |
| 197 void destroy_jni_reference(jobject jobj) { | |
| 198 JNIHandles::destroy_local(jobj); | |
| 199 } | |
| 200 | |
| 201 // method to destroy a local handle. | |
| 202 // This function allows caller to specify which | |
| 203 // threads local handle table to use although currently it is | |
| 204 // not used. | |
| 205 void destroy_jni_reference(JavaThread *thread, jobject jobj) { | |
| 206 destroy_jni_reference(jobj); | |
| 207 } | |
| 208 | |
| 209 jvmtiEnv* jvmti_external() { return &_jvmti_external; }; | |
| 210 | |
| 211 // Event Dispatch | |
| 212 | |
| 213 bool has_callback(jvmtiEvent event_type) { | |
| 214 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL && | |
| 215 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking"); | |
| 216 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL; | |
| 217 } | |
| 218 | |
| 219 jvmtiEventCallbacks* callbacks() { | |
| 220 return &_event_callbacks; | |
| 221 } | |
| 222 | |
| 223 jvmtiExtEventCallbacks* ext_callbacks() { | |
| 224 return &_ext_event_callbacks; | |
| 225 } | |
| 226 | |
| 227 void set_tag_map(JvmtiTagMap* tag_map) { | |
| 228 _tag_map = tag_map; | |
| 229 } | |
| 230 | |
| 231 JvmtiTagMap* tag_map() { | |
| 232 return _tag_map; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 // return true if event is enabled globally or for any thread | |
| 237 // True only if there is a callback for it. | |
| 238 bool is_enabled(jvmtiEvent event_type) { | |
| 239 return _env_event_enable.is_enabled(event_type); | |
| 240 } | |
| 241 | |
| 242 // Random Utilities | |
| 243 | |
| 244 protected: | |
| 245 // helper methods for creating arrays of global JNI Handles from local Handles | |
| 246 // allocated into environment specific storage | |
| 247 jobject * new_jobjectArray(int length, Handle *handles); | |
| 248 jthread * new_jthreadArray(int length, Handle *handles); | |
| 249 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles); | |
| 250 | |
| 251 // convert from JNIHandle to JavaThread * | |
| 252 JavaThread * get_JavaThread(jthread jni_thread); | |
| 253 | |
| 254 // convert to a jni jclass from a non-null klassOop | |
| 255 jclass get_jni_class_non_null(klassOop k); | |
| 256 | |
| 257 void update_klass_field_access_flag(fieldDescriptor *fd); | |
| 258 | |
| 259 jint count_locked_objects(JavaThread *java_thread, Handle hobj); | |
| 260 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread, | |
| 261 JavaThread* java_thread, | |
| 262 javaVFrame *jvf, | |
| 263 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, | |
| 264 jint depth); | |
| 265 vframe* vframeFor(JavaThread* java_thread, jint depth); | |
| 266 | |
| 267 public: | |
| 268 // get a field descriptor for the specified class and field | |
| 269 static bool get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd); | |
| 270 // test for suspend - most (all?) of these should go away | |
| 271 static bool is_thread_fully_suspended(JavaThread *thread, | |
| 272 bool wait_for_suspend, | |
| 273 uint32_t *bits); | |
| 274 | |
| 275 | |
| 276 // JVMTI API helper functions which are called at safepoint or thread is suspended. | |
| 277 jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr); | |
| 278 jvmtiError get_frame_location(JavaThread* java_thread, jint depth, | |
| 279 jmethodID* method_ptr, jlocation* location_ptr); | |
| 280 jvmtiError get_object_monitor_usage(JavaThread *calling_thread, | |
| 281 jobject object, jvmtiMonitorUsage* info_ptr); | |
| 282 jvmtiError get_stack_trace(JavaThread *java_thread, | |
| 283 jint stack_depth, jint max_count, | |
| 284 jvmtiFrameInfo* frame_buffer, jint* count_ptr); | |
| 285 jvmtiError get_current_contended_monitor(JavaThread *calling_thread, | |
| 286 JavaThread *java_thread, | |
| 287 jobject *monitor_ptr); | |
| 288 jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread, | |
| 289 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list); | |
| 290 jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread, | |
| 291 jvalue value, TosState tos, Handle* ret_ob_h); | |
| 292 jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos); | |
| 293 }; | |
| 294 | |
| 295 // This class is the only safe means of iterating through environments. | |
| 296 // Note that this iteratation includes invalid environments pending | |
| 297 // deallocation -- in fact, some uses depend on this behavior. | |
| 298 | |
| 299 class JvmtiEnvIterator : public StackObj { | |
| 300 private: | |
| 301 bool _entry_was_marked; | |
| 302 public: | |
| 303 JvmtiEnvIterator() { | |
| 304 if (Threads::number_of_threads() == 0) { | |
| 305 _entry_was_marked = false; // we are single-threaded, no need | |
| 306 } else { | |
| 307 Thread::current()->entering_jvmti_env_iteration(); | |
| 308 _entry_was_marked = true; | |
| 309 } | |
| 310 } | |
| 311 ~JvmtiEnvIterator() { | |
| 312 if (_entry_was_marked) { | |
| 313 Thread::current()->leaving_jvmti_env_iteration(); | |
| 314 } | |
| 315 } | |
| 316 JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); } | |
| 317 JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); } | |
| 318 }; | |
| 319 | |
| 320 | |
| 321 // VM operation to get monitor information with stack depth. | |
| 322 class VM_GetOwnedMonitorInfo : public VM_Operation { | |
| 323 private: | |
| 324 JvmtiEnv *_env; | |
| 325 JavaThread* _calling_thread; | |
| 326 JavaThread *_java_thread; | |
| 327 jvmtiError _result; | |
| 328 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
| 329 | |
| 330 public: | |
| 331 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, | |
| 332 JavaThread* java_thread, | |
| 333 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { | |
| 334 _env = env; | |
| 335 _calling_thread = calling_thread; | |
| 336 _java_thread = java_thread; | |
| 337 _owned_monitors_list = owned_monitor_list; | |
| 338 _result = JVMTI_ERROR_NONE; | |
| 339 } | |
| 340 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } | |
| 341 void doit() { | |
| 342 ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, | |
| 343 _owned_monitors_list); | |
| 344 } | |
| 345 jvmtiError result() { return _result; } | |
| 346 }; | |
| 347 | |
| 348 | |
| 349 // VM operation to get object monitor usage. | |
| 350 class VM_GetObjectMonitorUsage : public VM_Operation { | |
| 351 private: | |
| 352 JvmtiEnv *_env; | |
| 353 jobject _object; | |
| 354 JavaThread* _calling_thread; | |
| 355 jvmtiMonitorUsage* _info_ptr; | |
| 356 jvmtiError _result; | |
| 357 | |
| 358 public: | |
| 359 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { | |
| 360 _env = env; | |
| 361 _object = object; | |
| 362 _calling_thread = calling_thread; | |
| 363 _info_ptr = info_ptr; | |
| 364 } | |
| 365 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } | |
| 366 jvmtiError result() { return _result; } | |
| 367 void doit() { | |
| 368 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); | |
| 369 } | |
| 370 | |
| 371 }; | |
| 372 | |
| 373 // VM operation to get current contended monitor. | |
| 374 class VM_GetCurrentContendedMonitor : public VM_Operation { | |
| 375 private: | |
| 376 JvmtiEnv *_env; | |
| 377 JavaThread *_calling_thread; | |
| 378 JavaThread *_java_thread; | |
| 379 jobject *_owned_monitor_ptr; | |
| 380 jvmtiError _result; | |
| 381 | |
| 382 public: | |
| 383 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { | |
| 384 _env = env; | |
| 385 _calling_thread = calling_thread; | |
| 386 _java_thread = java_thread; | |
| 387 _owned_monitor_ptr = mon_ptr; | |
| 388 } | |
| 389 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } | |
| 390 jvmtiError result() { return _result; } | |
| 391 void doit() { | |
| 392 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); | |
| 393 } | |
| 394 }; | |
| 395 | |
| 396 // VM operation to get stack trace at safepoint. | |
| 397 class VM_GetStackTrace : public VM_Operation { | |
| 398 private: | |
| 399 JvmtiEnv *_env; | |
| 400 JavaThread *_java_thread; | |
| 401 jint _start_depth; | |
| 402 jint _max_count; | |
| 403 jvmtiFrameInfo *_frame_buffer; | |
| 404 jint *_count_ptr; | |
| 405 jvmtiError _result; | |
| 406 | |
| 407 public: | |
| 408 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, | |
| 409 jint start_depth, jint max_count, | |
| 410 jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
| 411 _env = env; | |
| 412 _java_thread = java_thread; | |
| 413 _start_depth = start_depth; | |
| 414 _max_count = max_count; | |
| 415 _frame_buffer = frame_buffer; | |
| 416 _count_ptr = count_ptr; | |
| 417 } | |
| 418 jvmtiError result() { return _result; } | |
| 419 VMOp_Type type() const { return VMOp_GetStackTrace; } | |
| 420 void doit() { | |
| 421 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, | |
| 422 _start_depth, _max_count, | |
| 423 _frame_buffer, _count_ptr); | |
| 424 } | |
| 425 }; | |
| 426 | |
| 427 // forward declaration | |
| 428 struct StackInfoNode; | |
| 429 | |
| 430 // VM operation to get stack trace at safepoint. | |
| 431 class VM_GetMultipleStackTraces : public VM_Operation { | |
| 432 private: | |
| 433 JvmtiEnv *_env; | |
| 434 jint _max_frame_count; | |
| 435 jvmtiStackInfo *_stack_info; | |
| 436 jvmtiError _result; | |
| 437 int _frame_count_total; | |
| 438 struct StackInfoNode *_head; | |
| 439 | |
| 440 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } | |
| 441 jint max_frame_count() { return _max_frame_count; } | |
| 442 struct StackInfoNode *head() { return _head; } | |
| 443 void set_head(StackInfoNode *head) { _head = head; } | |
| 444 | |
| 445 protected: | |
| 446 void set_result(jvmtiError result) { _result = result; } | |
| 447 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); | |
| 448 void allocate_and_fill_stacks(jint thread_count); | |
| 449 | |
| 450 public: | |
| 451 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { | |
| 452 _env = env; | |
| 453 _max_frame_count = max_frame_count; | |
| 454 _frame_count_total = 0; | |
| 455 _head = NULL; | |
| 456 _result = JVMTI_ERROR_NONE; | |
| 457 } | |
| 458 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } | |
| 459 jvmtiStackInfo *stack_info() { return _stack_info; } | |
| 460 jvmtiError result() { return _result; } | |
| 461 }; | |
| 462 | |
| 463 | |
| 464 // VM operation to get stack trace at safepoint. | |
| 465 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { | |
| 466 private: | |
| 467 JavaThread *_calling_thread; | |
| 468 jint _final_thread_count; | |
| 469 | |
| 470 public: | |
| 471 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, | |
| 472 jint max_frame_count) | |
| 473 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
| 474 _calling_thread = calling_thread; | |
| 475 } | |
| 476 VMOp_Type type() const { return VMOp_GetAllStackTraces; } | |
| 477 void doit(); | |
| 478 jint final_thread_count() { return _final_thread_count; } | |
| 479 }; | |
| 480 | |
| 481 // VM operation to get stack trace at safepoint. | |
| 482 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { | |
| 483 private: | |
| 484 jint _thread_count; | |
| 485 const jthread* _thread_list; | |
| 486 | |
| 487 public: | |
| 488 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) | |
| 489 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
| 490 _thread_count = thread_count; | |
| 491 _thread_list = thread_list; | |
| 492 } | |
| 493 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } | |
| 494 void doit(); | |
| 495 }; | |
| 496 | |
| 497 | |
| 498 // VM operation to count stack frames at safepoint. | |
| 499 class VM_GetFrameCount : public VM_Operation { | |
| 500 private: | |
| 501 JvmtiEnv *_env; | |
| 502 JvmtiThreadState *_state; | |
| 503 jint *_count_ptr; | |
| 504 jvmtiError _result; | |
| 505 | |
| 506 public: | |
| 507 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { | |
| 508 _env = env; | |
| 509 _state = state; | |
| 510 _count_ptr = count_ptr; | |
| 511 } | |
| 512 VMOp_Type type() const { return VMOp_GetFrameCount; } | |
| 513 jvmtiError result() { return _result; } | |
| 514 void doit() { | |
| 515 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); | |
| 516 } | |
| 517 }; | |
| 518 | |
| 519 // VM operation to frame location at safepoint. | |
| 520 class VM_GetFrameLocation : public VM_Operation { | |
| 521 private: | |
| 522 JvmtiEnv *_env; | |
| 523 JavaThread* _java_thread; | |
| 524 jint _depth; | |
| 525 jmethodID* _method_ptr; | |
| 526 jlocation* _location_ptr; | |
| 527 jvmtiError _result; | |
| 528 | |
| 529 public: | |
| 530 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, | |
| 531 jmethodID* method_ptr, jlocation* location_ptr) { | |
| 532 _env = env; | |
| 533 _java_thread = java_thread; | |
| 534 _depth = depth; | |
| 535 _method_ptr = method_ptr; | |
| 536 _location_ptr = location_ptr; | |
| 537 } | |
| 538 VMOp_Type type() const { return VMOp_GetFrameLocation; } | |
| 539 jvmtiError result() { return _result; } | |
| 540 void doit() { | |
| 541 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, | |
| 542 _method_ptr, _location_ptr); | |
| 543 } | |
| 544 }; | |
| 545 | |
| 546 | |
| 547 // ResourceTracker | |
| 548 // | |
| 549 // ResourceTracker works a little like a ResourceMark. All allocates | |
| 550 // using the resource tracker are recorded. If an allocate using the | |
| 551 // resource tracker fails the destructor will free any resources | |
| 552 // that were allocated using the tracker. | |
| 553 // The motive for this class is to avoid messy error recovery code | |
| 554 // in situations where multiple allocations are done in sequence. If | |
| 555 // the second or subsequent allocation fails it avoids any code to | |
| 556 // release memory allocated in the previous calls. | |
| 557 // | |
| 558 // Usage :- | |
| 559 // ResourceTracker rt(env); | |
| 560 // : | |
| 561 // err = rt.allocate(1024, &ptr); | |
| 562 | |
| 563 class ResourceTracker : public StackObj { | |
| 564 private: | |
| 565 JvmtiEnv* _env; | |
| 566 GrowableArray<unsigned char*> *_allocations; | |
| 567 bool _failed; | |
| 568 public: | |
| 569 ResourceTracker(JvmtiEnv* env); | |
| 570 ~ResourceTracker(); | |
| 571 jvmtiError allocate(jlong size, unsigned char** mem_ptr); | |
| 572 unsigned char* allocate(jlong size); | |
| 573 char* strdup(const char* str); | |
| 574 }; | |
| 575 | |
| 576 | |
| 577 // Jvmti monitor closure to collect off stack monitors. | |
| 578 class JvmtiMonitorClosure: public MonitorClosure { | |
| 579 private: | |
| 580 JavaThread *_java_thread; | |
| 581 JavaThread *_calling_thread; | |
| 582 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
| 583 jvmtiError _error; | |
| 584 JvmtiEnvBase *_env; | |
| 585 | |
| 586 public: | |
| 587 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, | |
| 588 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, | |
| 589 JvmtiEnvBase *env) { | |
| 590 _java_thread = thread; | |
| 591 _calling_thread = calling_thread; | |
| 592 _owned_monitors_list = owned_monitors; | |
| 593 _error = JVMTI_ERROR_NONE; | |
| 594 _env = env; | |
| 595 } | |
| 596 void do_monitor(ObjectMonitor* mon); | |
| 597 jvmtiError error() { return _error;} | |
| 598 }; | |
| 599 | |
| 600 #endif /* _JAVA_JVMTIENVBASE_H_ */ |