Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiThreadState.hpp @ 608:0386097d43d8
6700114: 3/4 Assertion (_thread->get_interp_only_mode() == 1,"leaving interp only when mode not one")
Summary: Don't create JvmtiThreadState for an exiting JavaThread.
Reviewed-by: coleenp, swamyv
| author | dcubed |
|---|---|
| date | Mon, 02 Mar 2009 13:57:17 -0700 |
| parents | a61af66fc99e |
| children | ea20d7ce26b0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact 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_JVMTITHREADSTATE_H_ | |
| 26 #define _JAVA_JVMTITHREADSTATE_H_ | |
| 27 | |
| 28 // | |
| 29 // Forward Declarations | |
| 30 // | |
| 31 | |
| 32 class JvmtiEnvBase; | |
| 33 class JvmtiEnvThreadState; | |
| 34 class JvmtiDynamicCodeEventCollector; | |
| 35 | |
| 36 enum JvmtiClassLoadKind { | |
| 37 jvmti_class_load_kind_load = 100, | |
| 38 jvmti_class_load_kind_retransform, | |
| 39 jvmti_class_load_kind_redefine | |
| 40 }; | |
| 41 | |
| 42 /////////////////////////////////////////////////////////////// | |
| 43 // | |
| 44 // class JvmtiEnvThreadStateIterator | |
| 45 // | |
| 46 // The only safe means of iterating through the JvmtiEnvThreadStates | |
| 47 // in a JvmtiThreadState. | |
| 48 // Note that this iteratation includes invalid environments pending | |
| 49 // deallocation -- in fact, some uses depend on this behavior. | |
| 50 // | |
| 51 class JvmtiEnvThreadStateIterator : public StackObj { | |
| 52 private: | |
| 53 JvmtiThreadState* state; | |
| 54 public: | |
| 55 JvmtiEnvThreadStateIterator(JvmtiThreadState* thread_state); | |
| 56 ~JvmtiEnvThreadStateIterator(); | |
| 57 JvmtiEnvThreadState* first(); | |
| 58 JvmtiEnvThreadState* next(JvmtiEnvThreadState* ets); | |
| 59 }; | |
| 60 | |
| 61 | |
| 62 /////////////////////////////////////////////////////////////// | |
| 63 // | |
| 64 // class JvmtiThreadState | |
| 65 // | |
| 66 // The Jvmti state for each thread (across all JvmtiEnv): | |
| 67 // 1. Local table of enabled events. | |
| 68 class JvmtiThreadState : public CHeapObj { | |
| 69 private: | |
| 70 friend class JvmtiEnv; | |
| 71 JavaThread *_thread; | |
| 72 bool _exception_detected; | |
| 73 bool _exception_caught; | |
| 74 bool _hide_single_stepping; | |
| 75 bool _pending_step_for_popframe; | |
| 76 bool _pending_step_for_earlyret; | |
| 77 int _hide_level; | |
| 78 | |
| 79 // Used to send class being redefined/retransformed and kind of transform | |
| 80 // info to the class file load hook event handler. | |
| 81 KlassHandle *_class_being_redefined; | |
| 82 JvmtiClassLoadKind _class_load_kind; | |
| 83 | |
| 84 // This is only valid when is_interp_only_mode() returns true | |
| 85 int _cur_stack_depth; | |
| 86 | |
| 87 JvmtiThreadEventEnable _thread_event_enable; | |
| 88 | |
| 89 // for support of JvmtiEnvThreadState | |
| 90 JvmtiEnvThreadState* _head_env_thread_state; | |
| 91 | |
| 92 // doubly-linked linear list of active thread state | |
| 93 // needed in order to iterate the list without holding Threads_lock | |
| 94 static JvmtiThreadState *_head; | |
| 95 JvmtiThreadState *_next; | |
| 96 JvmtiThreadState *_prev; | |
| 97 | |
| 98 // holds the current dynamic code event collector, NULL if no event collector in use | |
| 99 JvmtiDynamicCodeEventCollector* _dynamic_code_event_collector; | |
| 100 // holds the current vm object alloc event collector, NULL if no event collector in use | |
| 101 JvmtiVMObjectAllocEventCollector* _vm_object_alloc_event_collector; | |
| 102 | |
| 103 // Should only be created by factory methods | |
| 104 JvmtiThreadState(JavaThread *thread); | |
| 105 | |
| 106 friend class JvmtiEnvThreadStateIterator; | |
| 107 inline JvmtiEnvThreadState* head_env_thread_state(); | |
| 108 inline void set_head_env_thread_state(JvmtiEnvThreadState* ets); | |
| 109 | |
| 110 public: | |
| 111 ~JvmtiThreadState(); | |
| 112 | |
| 113 // is event_type enabled and usable for this thread in any enviroments? | |
| 114 bool is_enabled(jvmtiEvent event_type) { | |
| 115 return _thread_event_enable.is_enabled(event_type); | |
| 116 } | |
| 117 | |
| 118 JvmtiThreadEventEnable *thread_event_enable() { | |
| 119 return &_thread_event_enable; | |
| 120 } | |
| 121 | |
| 122 // Must only be called in situations where the state is for the current thread and | |
| 123 // the environment can not go away. To be safe, the returned JvmtiEnvThreadState | |
| 124 // must be used in such a way as there can be no intervening safepoints. | |
| 125 inline JvmtiEnvThreadState* env_thread_state(JvmtiEnvBase *env); | |
| 126 | |
| 127 static void periodic_clean_up(); | |
| 128 | |
| 129 void add_env(JvmtiEnvBase *env); | |
| 130 | |
| 131 // Used by the interpreter for fullspeed debugging support | |
| 132 bool is_interp_only_mode() { return _thread->is_interp_only_mode(); } | |
| 133 void enter_interp_only_mode(); | |
| 134 void leave_interp_only_mode(); | |
| 135 | |
| 136 // access to the linked list of all JVMTI thread states | |
| 137 static JvmtiThreadState *first() { | |
| 138 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); | |
| 139 return _head; | |
| 140 } | |
| 141 | |
| 142 JvmtiThreadState *next() { | |
| 143 return _next; | |
| 144 } | |
| 145 | |
| 146 // Current stack depth is only valid when is_interp_only_mode() returns true. | |
| 147 // These functions should only be called at a safepoint - usually called from same thread. | |
| 148 // Returns the number of Java activations on the stack. | |
| 149 int cur_stack_depth(); | |
| 150 void invalidate_cur_stack_depth(); | |
| 151 void incr_cur_stack_depth(); | |
| 152 void decr_cur_stack_depth(); | |
| 153 | |
| 154 int count_frames(); | |
| 155 | |
| 156 inline JavaThread *get_thread() { return _thread; } | |
| 157 inline bool is_exception_detected() { return _exception_detected; } | |
| 158 inline bool is_exception_caught() { return _exception_caught; } | |
| 159 inline void set_exception_detected() { _exception_detected = true; | |
| 160 _exception_caught = false; } | |
| 161 inline void set_exception_caught() { _exception_caught = true; | |
| 162 _exception_detected = false; } | |
| 163 | |
| 164 inline void clear_hide_single_stepping() { | |
| 165 if (_hide_level > 0) { | |
| 166 _hide_level--; | |
| 167 } else { | |
| 168 assert(_hide_single_stepping, "hide_single_stepping is out of phase"); | |
| 169 _hide_single_stepping = false; | |
| 170 } | |
| 171 } | |
| 172 inline bool hide_single_stepping() { return _hide_single_stepping; } | |
| 173 inline void set_hide_single_stepping() { | |
| 174 if (_hide_single_stepping) { | |
| 175 _hide_level++; | |
| 176 } else { | |
| 177 assert(_hide_level == 0, "hide_level is out of phase"); | |
| 178 _hide_single_stepping = true; | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 // Step pending flag is set when PopFrame is called and it is cleared | |
| 183 // when step for the Pop Frame is completed. | |
| 184 // This logic is used to distinguish b/w step for pop frame and repeat step. | |
| 185 void set_pending_step_for_popframe() { _pending_step_for_popframe = true; } | |
| 186 void clr_pending_step_for_popframe() { _pending_step_for_popframe = false; } | |
| 187 bool is_pending_step_for_popframe() { return _pending_step_for_popframe; } | |
| 188 void process_pending_step_for_popframe(); | |
| 189 | |
| 190 // Step pending flag is set when ForceEarlyReturn is called and it is cleared | |
| 191 // when step for the ForceEarlyReturn is completed. | |
| 192 // This logic is used to distinguish b/w step for early return and repeat step. | |
| 193 void set_pending_step_for_earlyret() { _pending_step_for_earlyret = true; } | |
| 194 void clr_pending_step_for_earlyret() { _pending_step_for_earlyret = false; } | |
| 195 bool is_pending_step_for_earlyret() { return _pending_step_for_earlyret; } | |
| 196 void process_pending_step_for_earlyret(); | |
| 197 | |
| 198 // Setter and getter method is used to send redefined class info | |
| 199 // when class file load hook event is posted. | |
| 200 // It is set while loading redefined class and cleared before the | |
| 201 // class file load hook event is posted. | |
| 202 inline void set_class_being_redefined(KlassHandle *h_class, JvmtiClassLoadKind kind) { | |
| 203 _class_being_redefined = h_class; | |
| 204 _class_load_kind = kind; | |
| 205 } | |
| 206 | |
| 207 inline void clear_class_being_redefined() { | |
| 208 _class_being_redefined = NULL; | |
| 209 _class_load_kind = jvmti_class_load_kind_load; | |
| 210 } | |
| 211 | |
| 212 inline KlassHandle *get_class_being_redefined() { | |
| 213 return _class_being_redefined; | |
| 214 } | |
| 215 | |
| 216 inline JvmtiClassLoadKind get_class_load_kind() { | |
| 217 return _class_load_kind; | |
| 218 } | |
| 219 | |
| 220 // RedefineClasses support | |
| 221 // The bug 6214132 caused the verification to fail. | |
| 222 // | |
| 223 // Below is the detailed description of the fix approach taken: | |
| 224 // 1. What's done in RedefineClasses() before verification: | |
| 225 // a) A reference to the class being redefined (_the_class) and a | |
| 226 // reference to new version of the class (_scratch_class) are | |
| 227 // saved here for use during the bytecode verification phase of | |
| 228 // RedefineClasses. See RedefineVerifyMark for how these fields | |
| 229 // are managed. | |
| 230 // b) The _java_mirror field from _the_class is copied to the | |
| 231 // _java_mirror field in _scratch_class. This means that a jclass | |
| 232 // returned for _the_class or _scratch_class will refer to the | |
| 233 // same Java mirror. The verifier will see the "one true mirror" | |
| 234 // for the class being verified. | |
| 235 // 2. What is done at verification: | |
| 236 // When the verifier makes calls into the VM to ask questions about | |
| 237 // the class being verified, it will pass the jclass to JVM_* functions. | |
| 238 // The jclass is always pointing to the mirror of _the_class. | |
| 239 // ~28 JVM_* functions called by the verifier for the information | |
| 240 // about CP entries and klass structure should check the jvmtiThreadState | |
| 241 // info about equivalent klass versions and use it to replace a klassOop | |
| 242 // of _the_class with a klassOop of _scratch_class. The function | |
| 243 // class_to_verify_considering_redefinition() must be called for it. | |
| 244 // | |
| 245 // Note again, that this redirection happens only for the verifier thread. | |
| 246 // Other threads have very small overhead by checking the existence | |
| 247 // of the jvmtiThreadSate and the information about klasses equivalence. | |
| 248 // No JNI functions need to be changed, they don't reference the klass guts. | |
| 249 // The JavaThread pointer is already available in all JVM_* functions | |
| 250 // used by the verifier, so there is no extra performance issue with it. | |
| 251 | |
| 252 private: | |
| 253 KlassHandle *_the_class_for_redefinition_verification; | |
| 254 KlassHandle *_scratch_class_for_redefinition_verification; | |
| 255 | |
| 256 public: | |
| 257 inline void set_class_versions_map(KlassHandle *the_class, | |
| 258 KlassHandle *scratch_class) { | |
| 259 _the_class_for_redefinition_verification = the_class; | |
| 260 _scratch_class_for_redefinition_verification = scratch_class; | |
| 261 } | |
| 262 | |
| 263 inline void clear_class_versions_map() { set_class_versions_map(NULL, NULL); } | |
| 264 | |
| 265 static inline | |
| 266 klassOop class_to_verify_considering_redefinition(klassOop klass, | |
| 267 JavaThread *thread) { | |
| 268 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
| 269 if (state != NULL && state->_the_class_for_redefinition_verification != NULL) { | |
| 270 if ((*(state->_the_class_for_redefinition_verification))() == klass) { | |
| 271 klass = (*(state->_scratch_class_for_redefinition_verification))(); | |
| 272 } | |
| 273 } | |
| 274 return klass; | |
| 275 } | |
| 276 | |
| 277 // Todo: get rid of this! | |
| 278 private: | |
| 279 bool _debuggable; | |
| 280 public: | |
| 281 // Should the thread be enumerated by jvmtiInternal::GetAllThreads? | |
| 282 bool is_debuggable() { return _debuggable; } | |
| 283 // If a thread cannot be suspended (has no valid last_java_frame) then it gets marked !debuggable | |
| 284 void set_debuggable(bool debuggable) { _debuggable = debuggable; } | |
| 285 | |
| 286 public: | |
| 287 | |
| 288 bool may_be_walked(); | |
| 289 | |
| 290 // Thread local event collector setter and getter methods. | |
| 291 JvmtiDynamicCodeEventCollector* get_dynamic_code_event_collector() { | |
| 292 return _dynamic_code_event_collector; | |
| 293 } | |
| 294 JvmtiVMObjectAllocEventCollector* get_vm_object_alloc_event_collector() { | |
| 295 return _vm_object_alloc_event_collector; | |
| 296 } | |
| 297 void set_dynamic_code_event_collector(JvmtiDynamicCodeEventCollector* collector) { | |
| 298 _dynamic_code_event_collector = collector; | |
| 299 } | |
| 300 void set_vm_object_alloc_event_collector(JvmtiVMObjectAllocEventCollector* collector) { | |
| 301 _vm_object_alloc_event_collector = collector; | |
| 302 } | |
| 303 | |
| 304 | |
| 305 // | |
| 306 // Frame routines | |
| 307 // | |
| 308 | |
| 309 public: | |
| 310 | |
| 311 // true when the thread was suspended with a pointer to the last Java frame. | |
| 312 bool has_last_frame() { return _thread->has_last_Java_frame(); } | |
| 313 | |
| 314 void update_for_pop_top_frame(); | |
| 315 | |
| 316 // already holding JvmtiThreadState_lock - retrieve or create JvmtiThreadState | |
| 317 inline static JvmtiThreadState *state_for_while_locked(JavaThread *thread) { | |
| 318 assert(JvmtiThreadState_lock->is_locked(), "sanity check"); | |
| 319 | |
| 320 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
| 321 if (state == NULL) { | |
|
608
0386097d43d8
6700114: 3/4 Assertion (_thread->get_interp_only_mode() == 1,"leaving interp only when mode not one")
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322 if (thread->is_exiting()) { |
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6700114: 3/4 Assertion (_thread->get_interp_only_mode() == 1,"leaving interp only when mode not one")
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323 // don't add a JvmtiThreadState to a thread that is exiting |
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324 return NULL; |
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6700114: 3/4 Assertion (_thread->get_interp_only_mode() == 1,"leaving interp only when mode not one")
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325 } |
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6700114: 3/4 Assertion (_thread->get_interp_only_mode() == 1,"leaving interp only when mode not one")
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326 |
| 0 | 327 state = new JvmtiThreadState(thread); |
| 328 } | |
| 329 return state; | |
| 330 } | |
| 331 | |
| 332 // retrieve or create JvmtiThreadState | |
| 333 inline static JvmtiThreadState *state_for(JavaThread *thread) { | |
| 334 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
| 335 if (state == NULL) { | |
| 336 MutexLocker mu(JvmtiThreadState_lock); | |
| 337 // check again with the lock held | |
| 338 state = state_for_while_locked(thread); | |
| 339 } else { | |
| 340 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 341 } | |
| 342 return state; | |
| 343 } | |
| 344 | |
| 345 // JVMTI ForceEarlyReturn support | |
| 346 | |
| 347 // This is set to earlyret_pending to signal that top Java frame | |
| 348 // should be returned immediately | |
| 349 public: | |
| 350 int _earlyret_state; | |
| 351 TosState _earlyret_tos; | |
| 352 jvalue _earlyret_value; | |
| 353 oop _earlyret_oop; // Used to return an oop result into Java code from | |
| 354 // ForceEarlyReturnObject, GC-preserved | |
| 355 | |
| 356 // Setting and clearing earlyret_state | |
| 357 // earlyret_pending indicates that a ForceEarlyReturn() has been | |
| 358 // requested and not yet been completed. | |
| 359 public: | |
| 360 enum EarlyretState { | |
| 361 earlyret_inactive = 0, | |
| 362 earlyret_pending = 1 | |
| 363 }; | |
| 364 | |
| 365 void set_earlyret_pending(void) { _earlyret_state = earlyret_pending; } | |
| 366 void clr_earlyret_pending(void) { _earlyret_state = earlyret_inactive; } | |
| 367 bool is_earlyret_pending(void) { return (_earlyret_state == earlyret_pending); } | |
| 368 | |
| 369 TosState earlyret_tos() { return _earlyret_tos; } | |
| 370 oop earlyret_oop() const { return _earlyret_oop; } | |
| 371 void set_earlyret_oop (oop x) { _earlyret_oop = x; } | |
| 372 jvalue earlyret_value() { return _earlyret_value; } | |
| 373 void set_earlyret_value(jvalue val, TosState tos) { _earlyret_tos = tos; _earlyret_value = val; } | |
| 374 void clr_earlyret_value() { _earlyret_tos = ilgl; _earlyret_value.j = 0L; } | |
| 375 | |
| 376 static ByteSize earlyret_state_offset() { return byte_offset_of(JvmtiThreadState, _earlyret_state); } | |
| 377 static ByteSize earlyret_tos_offset() { return byte_offset_of(JvmtiThreadState, _earlyret_tos); } | |
| 378 static ByteSize earlyret_oop_offset() { return byte_offset_of(JvmtiThreadState, _earlyret_oop); } | |
| 379 static ByteSize earlyret_value_offset() { return byte_offset_of(JvmtiThreadState, _earlyret_value); } | |
| 380 | |
| 381 void oops_do(OopClosure* f); // GC support | |
| 382 }; | |
| 383 | |
| 384 class RedefineVerifyMark : public StackObj { | |
| 385 private: | |
| 386 JvmtiThreadState *_state; | |
| 387 | |
| 388 public: | |
| 389 RedefineVerifyMark(KlassHandle *the_class, KlassHandle *scratch_class, | |
| 390 JvmtiThreadState *state) : _state(state) | |
| 391 { | |
| 392 _state->set_class_versions_map(the_class, scratch_class); | |
| 393 (*scratch_class)->set_java_mirror((*the_class)->java_mirror()); | |
| 394 } | |
| 395 | |
| 396 ~RedefineVerifyMark() { | |
| 397 _state->clear_class_versions_map(); | |
| 398 } | |
| 399 }; | |
| 400 | |
| 401 #endif /* _JAVA_JVMTITHREADSTATE_H_ */ |