Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiThreadState.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2003, 2006, 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
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_jvmtiThreadState.cpp.incl" | |
| 27 | |
| 28 // marker for when the stack depth has been reset and is now unknown. | |
| 29 // any negative number would work but small ones might obscure an | |
| 30 // underrun error. | |
| 31 static const int UNKNOWN_STACK_DEPTH = -99; | |
| 32 | |
| 33 /////////////////////////////////////////////////////////////// | |
| 34 // | |
| 35 // class JvmtiThreadState | |
| 36 // | |
| 37 // Instances of JvmtiThreadState hang off of each thread. | |
| 38 // Thread local storage for JVMTI. | |
| 39 // | |
| 40 | |
| 41 JvmtiThreadState *JvmtiThreadState::_head = NULL; | |
| 42 | |
| 43 JvmtiThreadState::JvmtiThreadState(JavaThread* thread) | |
| 44 : _thread_event_enable() { | |
| 45 assert(JvmtiThreadState_lock->is_locked(), "sanity check"); | |
| 46 _thread = thread; | |
| 47 _exception_detected = false; | |
| 48 _exception_caught = false; | |
| 49 _debuggable = true; | |
| 50 _hide_single_stepping = false; | |
| 51 _hide_level = 0; | |
| 52 _pending_step_for_popframe = false; | |
| 53 _class_being_redefined = NULL; | |
| 54 _class_load_kind = jvmti_class_load_kind_load; | |
| 55 _head_env_thread_state = NULL; | |
| 56 _dynamic_code_event_collector = NULL; | |
| 57 _vm_object_alloc_event_collector = NULL; | |
| 58 _the_class_for_redefinition_verification = NULL; | |
| 59 _scratch_class_for_redefinition_verification = NULL; | |
| 60 | |
| 61 // JVMTI ForceEarlyReturn support | |
| 62 _pending_step_for_earlyret = false; | |
| 63 _earlyret_state = earlyret_inactive; | |
| 64 _earlyret_tos = ilgl; | |
| 65 _earlyret_value.j = 0L; | |
| 66 _earlyret_oop = NULL; | |
| 67 | |
| 68 // add all the JvmtiEnvThreadState to the new JvmtiThreadState | |
| 69 { | |
| 70 JvmtiEnvIterator it; | |
| 71 for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) { | |
| 72 if (env->is_valid()) { | |
| 73 add_env(env); | |
| 74 } | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 // link us into the list | |
| 79 { | |
| 80 // The thread state list manipulation code must not have safepoints. | |
| 81 // See periodic_clean_up(). | |
| 82 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 83 | |
| 84 _prev = NULL; | |
| 85 _next = _head; | |
| 86 if (_head != NULL) { | |
| 87 _head->_prev = this; | |
| 88 } | |
| 89 _head = this; | |
| 90 } | |
| 91 | |
| 92 // set this as the state for the thread | |
| 93 thread->set_jvmti_thread_state(this); | |
| 94 } | |
| 95 | |
| 96 | |
| 97 JvmtiThreadState::~JvmtiThreadState() { | |
| 98 assert(JvmtiThreadState_lock->is_locked(), "sanity check"); | |
| 99 | |
| 100 // clear this as the state for the thread | |
| 101 get_thread()->set_jvmti_thread_state(NULL); | |
| 102 | |
| 103 // zap our env thread states | |
| 104 { | |
| 105 JvmtiEnvBase::entering_dying_thread_env_iteration(); | |
| 106 JvmtiEnvThreadStateIterator it(this); | |
| 107 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ) { | |
| 108 JvmtiEnvThreadState* zap = ets; | |
| 109 ets = it.next(ets); | |
| 110 delete zap; | |
| 111 } | |
| 112 JvmtiEnvBase::leaving_dying_thread_env_iteration(); | |
| 113 } | |
| 114 | |
| 115 // remove us from the list | |
| 116 { | |
| 117 // The thread state list manipulation code must not have safepoints. | |
| 118 // See periodic_clean_up(). | |
| 119 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 120 | |
| 121 if (_prev == NULL) { | |
| 122 assert(_head == this, "sanity check"); | |
| 123 _head = _next; | |
| 124 } else { | |
| 125 assert(_head != this, "sanity check"); | |
| 126 _prev->_next = _next; | |
| 127 } | |
| 128 if (_next != NULL) { | |
| 129 _next->_prev = _prev; | |
| 130 } | |
| 131 _next = NULL; | |
| 132 _prev = NULL; | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 | |
| 137 void | |
| 138 JvmtiThreadState::periodic_clean_up() { | |
| 139 assert(SafepointSynchronize::is_at_safepoint(), "at safepoint"); | |
| 140 | |
| 141 // This iteration is initialized with "_head" instead of "JvmtiThreadState::first()" | |
| 142 // because the latter requires the JvmtiThreadState_lock. | |
| 143 // This iteration is safe at a safepoint as well, see the No_Safepoint_Verifier | |
| 144 // asserts at all list manipulation sites. | |
| 145 for (JvmtiThreadState *state = _head; state != NULL; state = state->next()) { | |
| 146 // For each environment thread state corresponding to an invalid environment | |
| 147 // unlink it from the list and deallocate it. | |
| 148 JvmtiEnvThreadStateIterator it(state); | |
| 149 JvmtiEnvThreadState* previous_ets = NULL; | |
| 150 JvmtiEnvThreadState* ets = it.first(); | |
| 151 while (ets != NULL) { | |
| 152 if (ets->get_env()->is_valid()) { | |
| 153 previous_ets = ets; | |
| 154 ets = it.next(ets); | |
| 155 } else { | |
| 156 // This one isn't valid, remove it from the list and deallocate it | |
| 157 JvmtiEnvThreadState* defunct_ets = ets; | |
| 158 ets = ets->next(); | |
| 159 if (previous_ets == NULL) { | |
| 160 assert(state->head_env_thread_state() == defunct_ets, "sanity check"); | |
| 161 state->set_head_env_thread_state(ets); | |
| 162 } else { | |
| 163 previous_ets->set_next(ets); | |
| 164 } | |
| 165 delete defunct_ets; | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 void JvmtiThreadState::add_env(JvmtiEnvBase *env) { | |
| 172 assert(JvmtiThreadState_lock->is_locked(), "sanity check"); | |
| 173 | |
| 174 JvmtiEnvThreadState *new_ets = new JvmtiEnvThreadState(_thread, env); | |
| 175 // add this environment thread state to the end of the list (order is important) | |
| 176 { | |
| 177 // list deallocation (which occurs at a safepoint) cannot occur simultaneously | |
| 178 debug_only(No_Safepoint_Verifier nosafepoint;) | |
| 179 | |
| 180 JvmtiEnvThreadStateIterator it(this); | |
| 181 JvmtiEnvThreadState* previous_ets = NULL; | |
| 182 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
| 183 previous_ets = ets; | |
| 184 } | |
| 185 if (previous_ets == NULL) { | |
| 186 set_head_env_thread_state(new_ets); | |
| 187 } else { | |
| 188 previous_ets->set_next(new_ets); | |
| 189 } | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 | |
| 194 | |
| 195 | |
| 196 void JvmtiThreadState::enter_interp_only_mode() { | |
| 197 assert(_thread->get_interp_only_mode() == 0, "entering interp only when mode not zero"); | |
| 198 _thread->increment_interp_only_mode(); | |
| 199 } | |
| 200 | |
| 201 | |
| 202 void JvmtiThreadState::leave_interp_only_mode() { | |
| 203 assert(_thread->get_interp_only_mode() == 1, "leaving interp only when mode not one"); | |
| 204 _thread->decrement_interp_only_mode(); | |
| 205 } | |
| 206 | |
| 207 | |
| 208 // Helper routine used in several places | |
| 209 int JvmtiThreadState::count_frames() { | |
| 210 #ifdef ASSERT | |
| 211 uint32_t debug_bits = 0; | |
| 212 #endif | |
| 213 assert(SafepointSynchronize::is_at_safepoint() || | |
| 214 JvmtiEnv::is_thread_fully_suspended(get_thread(), false, &debug_bits), | |
| 215 "at safepoint or must be suspended"); | |
| 216 | |
| 217 if (!get_thread()->has_last_Java_frame()) return 0; // no Java frames | |
| 218 | |
| 219 ResourceMark rm; | |
| 220 RegisterMap reg_map(get_thread()); | |
| 221 javaVFrame *jvf = get_thread()->last_java_vframe(®_map); | |
| 222 int n = 0; | |
| 223 // tty->print_cr("CSD: counting frames on %s ...", | |
| 224 // JvmtiTrace::safe_get_thread_name(get_thread())); | |
| 225 while (jvf != NULL) { | |
| 226 methodOop method = jvf->method(); | |
| 227 // tty->print_cr("CSD: frame - method %s.%s - loc %d", | |
| 228 // method->klass_name()->as_C_string(), | |
| 229 // method->name()->as_C_string(), | |
| 230 // jvf->bci() ); | |
| 231 jvf = jvf->java_sender(); | |
| 232 n++; | |
| 233 } | |
| 234 // tty->print_cr("CSD: frame count: %d", n); | |
| 235 return n; | |
| 236 } | |
| 237 | |
| 238 | |
| 239 void JvmtiThreadState::invalidate_cur_stack_depth() { | |
| 240 Thread *cur = Thread::current(); | |
| 241 uint32_t debug_bits = 0; | |
| 242 | |
| 243 // The caller can be the VMThread at a safepoint, the current thread | |
| 244 // or the target thread must be suspended. | |
| 245 guarantee((cur->is_VM_thread() && SafepointSynchronize::is_at_safepoint()) || | |
| 246 (JavaThread *)cur == get_thread() || | |
| 247 JvmtiEnv::is_thread_fully_suspended(get_thread(), false, &debug_bits), | |
| 248 "sanity check"); | |
| 249 | |
| 250 _cur_stack_depth = UNKNOWN_STACK_DEPTH; | |
| 251 } | |
| 252 | |
| 253 void JvmtiThreadState::incr_cur_stack_depth() { | |
| 254 guarantee(JavaThread::current() == get_thread(), "must be current thread"); | |
| 255 | |
| 256 if (!is_interp_only_mode()) { | |
| 257 _cur_stack_depth = UNKNOWN_STACK_DEPTH; | |
| 258 } | |
| 259 if (_cur_stack_depth != UNKNOWN_STACK_DEPTH) { | |
| 260 ++_cur_stack_depth; | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 void JvmtiThreadState::decr_cur_stack_depth() { | |
| 265 guarantee(JavaThread::current() == get_thread(), "must be current thread"); | |
| 266 | |
| 267 if (!is_interp_only_mode()) { | |
| 268 _cur_stack_depth = UNKNOWN_STACK_DEPTH; | |
| 269 } | |
| 270 if (_cur_stack_depth != UNKNOWN_STACK_DEPTH) { | |
| 271 --_cur_stack_depth; | |
| 272 assert(_cur_stack_depth >= 0, "incr/decr_cur_stack_depth mismatch"); | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 int JvmtiThreadState::cur_stack_depth() { | |
| 277 uint32_t debug_bits = 0; | |
| 278 guarantee(JavaThread::current() == get_thread() || | |
| 279 JvmtiEnv::is_thread_fully_suspended(get_thread(), false, &debug_bits), | |
| 280 "must be current thread or suspended"); | |
| 281 | |
| 282 if (!is_interp_only_mode() || _cur_stack_depth == UNKNOWN_STACK_DEPTH) { | |
| 283 _cur_stack_depth = count_frames(); | |
| 284 } else { | |
| 285 // heavy weight assert | |
| 286 assert(_cur_stack_depth == count_frames(), | |
| 287 "cur_stack_depth out of sync"); | |
| 288 } | |
| 289 return _cur_stack_depth; | |
| 290 } | |
| 291 | |
| 292 bool JvmtiThreadState::may_be_walked() { | |
| 293 return (get_thread()->is_being_ext_suspended() || (JavaThread::current() == get_thread())); | |
| 294 } | |
| 295 | |
| 296 | |
| 297 void JvmtiThreadState::process_pending_step_for_popframe() { | |
| 298 // We are single stepping as the last part of the PopFrame() dance | |
| 299 // so we have some house keeping to do. | |
| 300 | |
| 301 JavaThread *thr = get_thread(); | |
| 302 if (thr->popframe_condition() != JavaThread::popframe_inactive) { | |
| 303 // If the popframe_condition field is not popframe_inactive, then | |
| 304 // we missed all of the popframe_field cleanup points: | |
| 305 // | |
| 306 // - unpack_frames() was not called (nothing to deopt) | |
| 307 // - remove_activation_preserving_args_entry() was not called | |
| 308 // (did not get suspended in a call_vm() family call and did | |
| 309 // not complete a call_vm() family call on the way here) | |
| 310 thr->clear_popframe_condition(); | |
| 311 } | |
| 312 | |
| 313 // clearing the flag indicates we are done with the PopFrame() dance | |
| 314 clr_pending_step_for_popframe(); | |
| 315 | |
| 316 // If step is pending for popframe then it may not be | |
| 317 // a repeat step. The new_bci and method_id is same as current_bci | |
| 318 // and current method_id after pop and step for recursive calls. | |
| 319 // Force the step by clearing the last location. | |
| 320 JvmtiEnvThreadStateIterator it(this); | |
| 321 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
| 322 ets->clear_current_location(); | |
| 323 } | |
| 324 } | |
| 325 | |
| 326 | |
| 327 // Class: JvmtiThreadState | |
| 328 // Function: update_for_pop_top_frame | |
| 329 // Description: | |
| 330 // This function removes any frame pop notification request for | |
| 331 // the top frame and invalidates both the current stack depth and | |
| 332 // all cached frameIDs. | |
| 333 // | |
| 334 // Called by: PopFrame | |
| 335 // | |
| 336 void JvmtiThreadState::update_for_pop_top_frame() { | |
| 337 if (is_interp_only_mode()) { | |
| 338 // remove any frame pop notification request for the top frame | |
| 339 // in any environment | |
| 340 int popframe_number = cur_stack_depth(); | |
| 341 { | |
| 342 JvmtiEnvThreadStateIterator it(this); | |
| 343 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
| 344 if (ets->is_frame_pop(popframe_number)) { | |
| 345 ets->clear_frame_pop(popframe_number); | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 // force stack depth to be recalculated | |
| 350 invalidate_cur_stack_depth(); | |
| 351 } else { | |
| 352 assert(!is_enabled(JVMTI_EVENT_FRAME_POP), "Must have no framepops set"); | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 | |
| 357 void JvmtiThreadState::process_pending_step_for_earlyret() { | |
| 358 // We are single stepping as the last part of the ForceEarlyReturn | |
| 359 // dance so we have some house keeping to do. | |
| 360 | |
| 361 if (is_earlyret_pending()) { | |
| 362 // If the earlyret_state field is not earlyret_inactive, then | |
| 363 // we missed all of the earlyret_field cleanup points: | |
| 364 // | |
| 365 // - remove_activation() was not called | |
| 366 // (did not get suspended in a call_vm() family call and did | |
| 367 // not complete a call_vm() family call on the way here) | |
| 368 // | |
| 369 // One legitimate way for us to miss all the cleanup points is | |
| 370 // if we got here right after handling a compiled return. If that | |
| 371 // is the case, then we consider our return from compiled code to | |
| 372 // complete the ForceEarlyReturn request and we clear the condition. | |
| 373 clr_earlyret_pending(); | |
| 374 set_earlyret_oop(NULL); | |
| 375 clr_earlyret_value(); | |
| 376 } | |
| 377 | |
| 378 // clearing the flag indicates we are done with | |
| 379 // the ForceEarlyReturn() dance | |
| 380 clr_pending_step_for_earlyret(); | |
| 381 | |
| 382 // If step is pending for earlyret then it may not be a repeat step. | |
| 383 // The new_bci and method_id is same as current_bci and current | |
| 384 // method_id after earlyret and step for recursive calls. | |
| 385 // Force the step by clearing the last location. | |
| 386 JvmtiEnvThreadStateIterator it(this); | |
| 387 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
| 388 ets->clear_current_location(); | |
| 389 } | |
| 390 } | |
| 391 | |
| 392 void JvmtiThreadState::oops_do(OopClosure* f) { | |
| 393 f->do_oop((oop*) &_earlyret_oop); | |
| 394 } |