1 /*
   2  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "ci/ciConstant.hpp"
  27 #include "ci/ciEnv.hpp"
  28 #include "ci/ciField.hpp"
  29 #include "ci/ciInstance.hpp"
  30 #include "ci/ciInstanceKlass.hpp"
  31 #include "ci/ciMethod.hpp"
  32 #include "ci/ciNullObject.hpp"
  33 #include "ci/ciReplay.hpp"
  34 #include "ci/ciUtilities.hpp"
  35 #include "classfile/systemDictionary.hpp"
  36 #include "classfile/vmSymbols.hpp"
  37 #include "code/scopeDesc.hpp"
  38 #include "compiler/compileBroker.hpp"
  39 #include "compiler/compileLog.hpp"
  40 #include "compiler/compilerOracle.hpp"
  41 #include "gc_interface/collectedHeap.inline.hpp"
  42 #include "interpreter/linkResolver.hpp"
  43 #include "memory/allocation.inline.hpp"
  44 #include "memory/oopFactory.hpp"
  45 #include "memory/universe.inline.hpp"
  46 #include "oops/methodData.hpp"
  47 #include "oops/objArrayKlass.hpp"
  48 #include "oops/oop.inline.hpp"
  49 #include "oops/oop.inline2.hpp"
  50 #include "prims/jvmtiExport.hpp"
  51 #include "runtime/init.hpp"
  52 #include "runtime/reflection.hpp"
  53 #include "runtime/sharedRuntime.hpp"
  54 #include "utilities/dtrace.hpp"
  55 #include "utilities/macros.hpp"
  56 #ifdef COMPILER1
  57 #include "c1/c1_Runtime1.hpp"
  58 #endif
  59 #ifdef COMPILER2
  60 #include "opto/runtime.hpp"
  61 #endif
  62 
  63 // ciEnv
  64 //
  65 // This class is the top level broker for requests from the compiler
  66 // to the VM.
  67 
  68 ciObject*              ciEnv::_null_object_instance;
  69 
  70 #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL;
  71 WK_KLASSES_DO(WK_KLASS_DEFN)
  72 #undef WK_KLASS_DEFN
  73 
  74 ciSymbol*        ciEnv::_unloaded_cisymbol = NULL;
  75 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
  76 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
  77 
  78 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
  79 jobject ciEnv::_ArrayStoreException_handle = NULL;
  80 jobject ciEnv::_ClassCastException_handle = NULL;
  81 
  82 #ifndef PRODUCT
  83 static bool firstEnv = true;
  84 #endif /* PRODUCT */
  85 
  86 // ------------------------------------------------------------------
  87 // ciEnv::ciEnv
  88 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) {
  89   VM_ENTRY_MARK;
  90 
  91   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
  92   thread->set_env(this);
  93   assert(ciEnv::current() == this, "sanity");
  94 
  95   _oop_recorder = NULL;
  96   _debug_info = NULL;
  97   _dependencies = NULL;
  98   _failure_reason = NULL;
  99   _compilable = MethodCompilable;
 100   _break_at_compile = false;
 101   _compiler_data = NULL;
 102 #ifndef PRODUCT
 103   assert(!firstEnv, "not initialized properly");
 104 #endif /* !PRODUCT */
 105 
 106   _system_dictionary_modification_counter = system_dictionary_modification_counter;
 107   _num_inlined_bytecodes = 0;
 108   assert(task == NULL || thread->task() == task, "sanity");
 109   _task = task;
 110   _log = NULL;
 111 
 112   // Temporary buffer for creating symbols and such.
 113   _name_buffer = NULL;
 114   _name_buffer_len = 0;
 115 
 116   _arena   = &_ciEnv_arena;
 117   _factory = new (_arena) ciObjectFactory(_arena, 128);
 118 
 119   // Preload commonly referenced system ciObjects.
 120 
 121   // During VM initialization, these instances have not yet been created.
 122   // Assertions ensure that these instances are not accessed before
 123   // their initialization.
 124 
 125   assert(Universe::is_fully_initialized(), "should be complete");
 126 
 127   oop o = Universe::null_ptr_exception_instance();
 128   assert(o != NULL, "should have been initialized");
 129   _NullPointerException_instance = get_object(o)->as_instance();
 130   o = Universe::arithmetic_exception_instance();
 131   assert(o != NULL, "should have been initialized");
 132   _ArithmeticException_instance = get_object(o)->as_instance();
 133 
 134   _ArrayIndexOutOfBoundsException_instance = NULL;
 135   _ArrayStoreException_instance = NULL;
 136   _ClassCastException_instance = NULL;
 137   _the_null_string = NULL;
 138   _the_min_jint_string = NULL;
 139 }
 140 
 141 ciEnv::ciEnv(Arena* arena) {
 142   ASSERT_IN_VM;
 143 
 144   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
 145   CompilerThread* current_thread = CompilerThread::current();
 146   assert(current_thread->env() == NULL, "must be");
 147   current_thread->set_env(this);
 148   assert(ciEnv::current() == this, "sanity");
 149 
 150   _oop_recorder = NULL;
 151   _debug_info = NULL;
 152   _dependencies = NULL;
 153   _failure_reason = NULL;
 154   _compilable = MethodCompilable_never;
 155   _break_at_compile = false;
 156   _compiler_data = NULL;
 157 #ifndef PRODUCT
 158   assert(firstEnv, "must be first");
 159   firstEnv = false;
 160 #endif /* !PRODUCT */
 161 
 162   _system_dictionary_modification_counter = 0;
 163   _num_inlined_bytecodes = 0;
 164   _task = NULL;
 165   _log = NULL;
 166 
 167   // Temporary buffer for creating symbols and such.
 168   _name_buffer = NULL;
 169   _name_buffer_len = 0;
 170 
 171   _arena   = arena;
 172   _factory = new (_arena) ciObjectFactory(_arena, 128);
 173 
 174   // Preload commonly referenced system ciObjects.
 175 
 176   // During VM initialization, these instances have not yet been created.
 177   // Assertions ensure that these instances are not accessed before
 178   // their initialization.
 179 
 180   assert(Universe::is_fully_initialized(), "must be");
 181 
 182   _NullPointerException_instance = NULL;
 183   _ArithmeticException_instance = NULL;
 184   _ArrayIndexOutOfBoundsException_instance = NULL;
 185   _ArrayStoreException_instance = NULL;
 186   _ClassCastException_instance = NULL;
 187   _the_null_string = NULL;
 188   _the_min_jint_string = NULL;
 189 }
 190 
 191 ciEnv::~ciEnv() {
 192   CompilerThread* current_thread = CompilerThread::current();
 193   _factory->remove_symbols();
 194   // Need safepoint to clear the env on the thread.  RedefineClasses might
 195   // be reading it.
 196   GUARDED_VM_ENTRY(current_thread->set_env(NULL);)
 197 }
 198 
 199 // ------------------------------------------------------------------
 200 // Cache Jvmti state
 201 void ciEnv::cache_jvmti_state() {
 202   VM_ENTRY_MARK;
 203   // Get Jvmti capabilities under lock to get consistant values.
 204   MutexLocker mu(JvmtiThreadState_lock);
 205   _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
 206   _jvmti_can_access_local_variables     = JvmtiExport::can_access_local_variables();
 207   _jvmti_can_post_on_exceptions         = JvmtiExport::can_post_on_exceptions();
 208 }
 209 
 210 // ------------------------------------------------------------------
 211 // Cache DTrace flags
 212 void ciEnv::cache_dtrace_flags() {
 213   // Need lock?
 214   _dtrace_extended_probes = ExtendedDTraceProbes;
 215   if (_dtrace_extended_probes) {
 216     _dtrace_monitor_probes  = true;
 217     _dtrace_method_probes   = true;
 218     _dtrace_alloc_probes    = true;
 219   } else {
 220     _dtrace_monitor_probes  = DTraceMonitorProbes;
 221     _dtrace_method_probes   = DTraceMethodProbes;
 222     _dtrace_alloc_probes    = DTraceAllocProbes;
 223   }
 224 }
 225 
 226 // ------------------------------------------------------------------
 227 // helper for lazy exception creation
 228 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
 229   VM_ENTRY_MARK;
 230   if (handle == NULL) {
 231     // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
 232     Klass* k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
 233     jobject objh = NULL;
 234     if (!HAS_PENDING_EXCEPTION && k != NULL) {
 235       oop obj = InstanceKlass::cast(k)->allocate_instance(THREAD);
 236       if (!HAS_PENDING_EXCEPTION)
 237         objh = JNIHandles::make_global(obj);
 238     }
 239     if (HAS_PENDING_EXCEPTION) {
 240       CLEAR_PENDING_EXCEPTION;
 241     } else {
 242       handle = objh;
 243     }
 244   }
 245   oop obj = JNIHandles::resolve(handle);
 246   return obj == NULL? NULL: get_object(obj)->as_instance();
 247 }
 248 
 249 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
 250   if (_ArrayIndexOutOfBoundsException_instance == NULL) {
 251     _ArrayIndexOutOfBoundsException_instance
 252           = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
 253           vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 254   }
 255   return _ArrayIndexOutOfBoundsException_instance;
 256 }
 257 ciInstance* ciEnv::ArrayStoreException_instance() {
 258   if (_ArrayStoreException_instance == NULL) {
 259     _ArrayStoreException_instance
 260           = get_or_create_exception(_ArrayStoreException_handle,
 261           vmSymbols::java_lang_ArrayStoreException());
 262   }
 263   return _ArrayStoreException_instance;
 264 }
 265 ciInstance* ciEnv::ClassCastException_instance() {
 266   if (_ClassCastException_instance == NULL) {
 267     _ClassCastException_instance
 268           = get_or_create_exception(_ClassCastException_handle,
 269           vmSymbols::java_lang_ClassCastException());
 270   }
 271   return _ClassCastException_instance;
 272 }
 273 
 274 ciInstance* ciEnv::the_null_string() {
 275   if (_the_null_string == NULL) {
 276     VM_ENTRY_MARK;
 277     _the_null_string = get_object(Universe::the_null_string())->as_instance();
 278   }
 279   return _the_null_string;
 280 }
 281 
 282 ciInstance* ciEnv::the_min_jint_string() {
 283   if (_the_min_jint_string == NULL) {
 284     VM_ENTRY_MARK;
 285     _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
 286   }
 287   return _the_min_jint_string;
 288 }
 289 
 290 // ------------------------------------------------------------------
 291 // ciEnv::get_method_from_handle
 292 ciMethod* ciEnv::get_method_from_handle(Method* method) {
 293   VM_ENTRY_MARK;
 294   return get_metadata(method)->as_method();
 295 }
 296 
 297 // ------------------------------------------------------------------
 298 // ciEnv::array_element_offset_in_bytes
 299 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
 300   VM_ENTRY_MARK;
 301   objArrayOop a = (objArrayOop)a_h->get_oop();
 302   assert(a->is_objArray(), "");
 303   int length = a->length();
 304   oop o = o_h->get_oop();
 305   for (int i = 0; i < length; i++) {
 306     if (a->obj_at(i) == o)  return i;
 307   }
 308   return -1;
 309 }
 310 
 311 
 312 // ------------------------------------------------------------------
 313 // ciEnv::check_klass_accessiblity
 314 //
 315 // Note: the logic of this method should mirror the logic of
 316 // ConstantPool::verify_constant_pool_resolve.
 317 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
 318                                       Klass* resolved_klass) {
 319   if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
 320     return true;
 321   }
 322   if (accessing_klass->is_obj_array_klass()) {
 323     accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
 324   }
 325   if (!accessing_klass->is_instance_klass()) {
 326     return true;
 327   }
 328 
 329   if (resolved_klass->oop_is_objArray()) {
 330     // Find the element klass, if this is an array.
 331     resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
 332   }
 333   if (resolved_klass->oop_is_instance()) {
 334     return Reflection::verify_class_access(accessing_klass->get_Klass(),
 335                                            resolved_klass,
 336                                            true);
 337   }
 338   return true;
 339 }
 340 
 341 // ------------------------------------------------------------------
 342 // ciEnv::get_klass_by_name_impl
 343 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
 344                                        constantPoolHandle cpool,
 345                                        ciSymbol* name,
 346                                        bool require_local) {
 347   ASSERT_IN_VM;
 348   EXCEPTION_CONTEXT;
 349 
 350   // Now we need to check the SystemDictionary
 351   Symbol* sym = name->get_symbol();
 352   if (sym->byte_at(0) == 'L' &&
 353     sym->byte_at(sym->utf8_length()-1) == ';') {
 354     // This is a name from a signature.  Strip off the trimmings.
 355     // Call recursive to keep scope of strippedsym.
 356     TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
 357                     sym->utf8_length()-2,
 358                     KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
 359     ciSymbol* strippedname = get_symbol(strippedsym);
 360     return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
 361   }
 362 
 363   // Check for prior unloaded klass.  The SystemDictionary's answers
 364   // can vary over time but the compiler needs consistency.
 365   ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
 366   if (unloaded_klass != NULL) {
 367     if (require_local)  return NULL;
 368     return unloaded_klass;
 369   }
 370 
 371   Handle loader(THREAD, (oop)NULL);
 372   Handle domain(THREAD, (oop)NULL);
 373   if (accessing_klass != NULL) {
 374     loader = Handle(THREAD, accessing_klass->loader());
 375     domain = Handle(THREAD, accessing_klass->protection_domain());
 376   }
 377 
 378   // setup up the proper type to return on OOM
 379   ciKlass* fail_type;
 380   if (sym->byte_at(0) == '[') {
 381     fail_type = _unloaded_ciobjarrayklass;
 382   } else {
 383     fail_type = _unloaded_ciinstance_klass;
 384   }
 385   KlassHandle found_klass;
 386   {
 387     ttyUnlocker ttyul;  // release tty lock to avoid ordering problems
 388     MutexLocker ml(Compile_lock);
 389     Klass* kls;
 390     if (!require_local) {
 391       kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
 392                                                                        KILL_COMPILE_ON_FATAL_(fail_type));
 393     } else {
 394       kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
 395                                                            KILL_COMPILE_ON_FATAL_(fail_type));
 396     }
 397     found_klass = KlassHandle(THREAD, kls);
 398   }
 399 
 400   // If we fail to find an array klass, look again for its element type.
 401   // The element type may be available either locally or via constraints.
 402   // In either case, if we can find the element type in the system dictionary,
 403   // we must build an array type around it.  The CI requires array klasses
 404   // to be loaded if their element klasses are loaded, except when memory
 405   // is exhausted.
 406   if (sym->byte_at(0) == '[' &&
 407       (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
 408     // We have an unloaded array.
 409     // Build it on the fly if the element class exists.
 410     TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
 411                                                  sym->utf8_length()-1,
 412                                                  KILL_COMPILE_ON_FATAL_(fail_type));
 413 
 414     // Get element ciKlass recursively.
 415     ciKlass* elem_klass =
 416       get_klass_by_name_impl(accessing_klass,
 417                              cpool,
 418                              get_symbol(elem_sym),
 419                              require_local);
 420     if (elem_klass != NULL && elem_klass->is_loaded()) {
 421       // Now make an array for it
 422       return ciObjArrayKlass::make_impl(elem_klass);
 423     }
 424   }
 425 
 426   if (found_klass() == NULL && !cpool.is_null() && cpool->has_preresolution()) {
 427     // Look inside the constant pool for pre-resolved class entries.
 428     for (int i = cpool->length() - 1; i >= 1; i--) {
 429       if (cpool->tag_at(i).is_klass()) {
 430         Klass* kls = cpool->resolved_klass_at(i);
 431         if (kls->name() == sym) {
 432           found_klass = KlassHandle(THREAD, kls);
 433           break;
 434         }
 435       }
 436     }
 437   }
 438 
 439   if (found_klass() != NULL) {
 440     // Found it.  Build a CI handle.
 441     return get_klass(found_klass());
 442   }
 443 
 444   if (require_local)  return NULL;
 445 
 446   // Not yet loaded into the VM, or not governed by loader constraints.
 447   // Make a CI representative for it.
 448   return get_unloaded_klass(accessing_klass, name);
 449 }
 450 
 451 // ------------------------------------------------------------------
 452 // ciEnv::get_klass_by_name
 453 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
 454                                   ciSymbol* klass_name,
 455                                   bool require_local) {
 456   GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
 457                                                  constantPoolHandle(),
 458                                                  klass_name,
 459                                                  require_local);)
 460 }
 461 
 462 // ------------------------------------------------------------------
 463 // ciEnv::get_klass_by_index_impl
 464 //
 465 // Implementation of get_klass_by_index.
 466 ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool,
 467                                         int index,
 468                                         bool& is_accessible,
 469                                         ciInstanceKlass* accessor) {
 470   EXCEPTION_CONTEXT;
 471   KlassHandle klass; // = NULL;
 472   Symbol* klass_name = NULL;
 473 
 474   if (cpool->tag_at(index).is_symbol()) {
 475     klass_name = cpool->symbol_at(index);
 476   } else {
 477     // Check if it's resolved if it's not a symbol constant pool entry.
 478     klass = KlassHandle(THREAD, ConstantPool::klass_at_if_loaded(cpool, index));
 479 
 480   if (klass.is_null()) {
 481     // The klass has not been inserted into the constant pool.
 482     // Try to look it up by name.
 483     {
 484       // We have to lock the cpool to keep the oop from being resolved
 485       // while we are accessing it.
 486         MonitorLockerEx ml(cpool->lock());
 487       constantTag tag = cpool->tag_at(index);
 488       if (tag.is_klass()) {
 489         // The klass has been inserted into the constant pool
 490         // very recently.
 491         klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
 492       } else {
 493         assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
 494         klass_name = cpool->unresolved_klass_at(index);
 495       }
 496     }
 497   }
 498   }
 499 
 500   if (klass.is_null()) {
 501     // Not found in constant pool.  Use the name to do the lookup.
 502     ciKlass* k = get_klass_by_name_impl(accessor,
 503                                         cpool,
 504                                         get_symbol(klass_name),
 505                                         false);
 506     // Calculate accessibility the hard way.
 507     if (!k->is_loaded()) {
 508       is_accessible = false;
 509     } else if (k->loader() != accessor->loader() &&
 510                get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
 511       // Loaded only remotely.  Not linked yet.
 512       is_accessible = false;
 513     } else {
 514       // Linked locally, and we must also check public/private, etc.
 515       is_accessible = check_klass_accessibility(accessor, k->get_Klass());
 516     }
 517     return k;
 518   }
 519 
 520   // Check for prior unloaded klass.  The SystemDictionary's answers
 521   // can vary over time but the compiler needs consistency.
 522   ciSymbol* name = get_symbol(klass()->name());
 523   ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
 524   if (unloaded_klass != NULL) {
 525     is_accessible = false;
 526     return unloaded_klass;
 527   }
 528 
 529   // It is known to be accessible, since it was found in the constant pool.
 530   is_accessible = true;
 531   return get_klass(klass());
 532 }
 533 
 534 // ------------------------------------------------------------------
 535 // ciEnv::get_klass_by_index
 536 //
 537 // Get a klass from the constant pool.
 538 ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool,
 539                                    int index,
 540                                    bool& is_accessible,
 541                                    ciInstanceKlass* accessor) {
 542   GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
 543 }
 544 
 545 // ------------------------------------------------------------------
 546 // ciEnv::get_constant_by_index_impl
 547 //
 548 // Implementation of get_constant_by_index().
 549 ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool,
 550                                              int pool_index, int cache_index,
 551                                              ciInstanceKlass* accessor) {
 552   bool ignore_will_link;
 553   EXCEPTION_CONTEXT;
 554   int index = pool_index;
 555   if (cache_index >= 0) {
 556     assert(index < 0, "only one kind of index at a time");
 557     oop obj = cpool->resolved_references()->obj_at(cache_index);
 558     if (obj != NULL) {
 559       ciObject* ciobj = get_object(obj);
 560       return ciConstant(T_OBJECT, ciobj);
 561     }
 562     index = cpool->object_to_cp_index(cache_index);
 563   }
 564   constantTag tag = cpool->tag_at(index);
 565   if (tag.is_int()) {
 566     return ciConstant(T_INT, (jint)cpool->int_at(index));
 567   } else if (tag.is_long()) {
 568     return ciConstant((jlong)cpool->long_at(index));
 569   } else if (tag.is_float()) {
 570     return ciConstant((jfloat)cpool->float_at(index));
 571   } else if (tag.is_double()) {
 572     return ciConstant((jdouble)cpool->double_at(index));
 573   } else if (tag.is_string()) {
 574     oop string = NULL;
 575     assert(cache_index >= 0, "should have a cache index");
 576     if (cpool->is_pseudo_string_at(index)) {
 577       string = cpool->pseudo_string_at(index, cache_index);
 578     } else {
 579       string = cpool->string_at(index, cache_index, THREAD);
 580       if (HAS_PENDING_EXCEPTION) {
 581         CLEAR_PENDING_EXCEPTION;
 582         record_out_of_memory_failure();
 583         return ciConstant();
 584       }
 585     }
 586     ciObject* constant = get_object(string);
 587     assert (constant->is_instance(), "must be an instance, or not? ");
 588     return ciConstant(T_OBJECT, constant);
 589   } else if (tag.is_klass() || tag.is_unresolved_klass()) {
 590     // 4881222: allow ldc to take a class type
 591     ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
 592     if (HAS_PENDING_EXCEPTION) {
 593       CLEAR_PENDING_EXCEPTION;
 594       record_out_of_memory_failure();
 595       return ciConstant();
 596     }
 597     assert (klass->is_instance_klass() || klass->is_array_klass(),
 598             "must be an instance or array klass ");
 599     return ciConstant(T_OBJECT, klass->java_mirror());
 600   } else if (tag.is_method_type()) {
 601     // must execute Java code to link this CP entry into cache[i].f1
 602     ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
 603     ciObject* ciobj = get_unloaded_method_type_constant(signature);
 604     return ciConstant(T_OBJECT, ciobj);
 605   } else if (tag.is_method_handle()) {
 606     // must execute Java code to link this CP entry into cache[i].f1
 607     int ref_kind        = cpool->method_handle_ref_kind_at(index);
 608     int callee_index    = cpool->method_handle_klass_index_at(index);
 609     ciKlass* callee     = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
 610     ciSymbol* name      = get_symbol(cpool->method_handle_name_ref_at(index));
 611     ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
 612     ciObject* ciobj     = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
 613     return ciConstant(T_OBJECT, ciobj);
 614   } else {
 615     ShouldNotReachHere();
 616     return ciConstant();
 617   }
 618 }
 619 
 620 // ------------------------------------------------------------------
 621 // ciEnv::get_constant_by_index
 622 //
 623 // Pull a constant out of the constant pool.  How appropriate.
 624 //
 625 // Implementation note: this query is currently in no way cached.
 626 ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool,
 627                                         int pool_index, int cache_index,
 628                                         ciInstanceKlass* accessor) {
 629   GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
 630 }
 631 
 632 // ------------------------------------------------------------------
 633 // ciEnv::get_field_by_index_impl
 634 //
 635 // Implementation of get_field_by_index.
 636 //
 637 // Implementation note: the results of field lookups are cached
 638 // in the accessor klass.
 639 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
 640                                         int index) {
 641   ciConstantPoolCache* cache = accessor->field_cache();
 642   if (cache == NULL) {
 643     ciField* field = new (arena()) ciField(accessor, index);
 644     return field;
 645   } else {
 646     ciField* field = (ciField*)cache->get(index);
 647     if (field == NULL) {
 648       field = new (arena()) ciField(accessor, index);
 649       cache->insert(index, field);
 650     }
 651     return field;
 652   }
 653 }
 654 
 655 // ------------------------------------------------------------------
 656 // ciEnv::get_field_by_index
 657 //
 658 // Get a field by index from a klass's constant pool.
 659 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
 660                                    int index) {
 661   GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
 662 }
 663 
 664 // ------------------------------------------------------------------
 665 // ciEnv::lookup_method
 666 //
 667 // Perform an appropriate method lookup based on accessor, holder,
 668 // name, signature, and bytecode.
 669 Method* ciEnv::lookup_method(InstanceKlass*  accessor,
 670                                InstanceKlass*  holder,
 671                                Symbol*       name,
 672                                Symbol*       sig,
 673                                Bytecodes::Code bc) {
 674   EXCEPTION_CONTEXT;
 675   KlassHandle h_accessor(THREAD, accessor);
 676   KlassHandle h_holder(THREAD, holder);
 677   LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
 678   methodHandle dest_method;
 679   switch (bc) {
 680   case Bytecodes::_invokestatic:
 681     dest_method =
 682       LinkResolver::resolve_static_call_or_null(h_holder, name, sig, h_accessor);
 683     break;
 684   case Bytecodes::_invokespecial:
 685     dest_method =
 686       LinkResolver::resolve_special_call_or_null(h_holder, name, sig, h_accessor);
 687     break;
 688   case Bytecodes::_invokeinterface:
 689     dest_method =
 690       LinkResolver::linktime_resolve_interface_method_or_null(h_holder, name, sig,
 691                                                               h_accessor, true);
 692     break;
 693   case Bytecodes::_invokevirtual:
 694     dest_method =
 695       LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, name, sig,
 696                                                             h_accessor, true);
 697     break;
 698   default: ShouldNotReachHere();
 699   }
 700 
 701   return dest_method();
 702 }
 703 
 704 
 705 // ------------------------------------------------------------------
 706 // ciEnv::get_method_by_index_impl
 707 ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool,
 708                                           int index, Bytecodes::Code bc,
 709                                           ciInstanceKlass* accessor) {
 710   if (bc == Bytecodes::_invokedynamic) {
 711     ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
 712     bool is_resolved = !cpce->is_f1_null();
 713     // FIXME: code generation could allow for null (unlinked) call site
 714     // The call site could be made patchable as follows:
 715     // Load the appendix argument from the constant pool.
 716     // Test the appendix argument and jump to a known deopt routine if it is null.
 717     // Jump through a patchable call site, which is initially a deopt routine.
 718     // Patch the call site to the nmethod entry point of the static compiled lambda form.
 719     // As with other two-component call sites, both values must be independently verified.
 720 
 721     if (is_resolved) {
 722       // Get the invoker Method* from the constant pool.
 723       // (The appendix argument, if any, will be noted in the method's signature.)
 724       Method* adapter = cpce->f1_as_method();
 725       return get_method(adapter);
 726     }
 727 
 728     // Fake a method that is equivalent to a declared method.
 729     ciInstanceKlass* holder    = get_instance_klass(SystemDictionary::MethodHandle_klass());
 730     ciSymbol*        name      = ciSymbol::invokeBasic_name();
 731     ciSymbol*        signature = get_symbol(cpool->signature_ref_at(index));
 732     return get_unloaded_method(holder, name, signature, accessor);
 733   } else {
 734     const int holder_index = cpool->klass_ref_index_at(index);
 735     bool holder_is_accessible;
 736     ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
 737     ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
 738 
 739     // Get the method's name and signature.
 740     Symbol* name_sym = cpool->name_ref_at(index);
 741     Symbol* sig_sym  = cpool->signature_ref_at(index);
 742 
 743     if (cpool->has_preresolution()
 744         || (holder == ciEnv::MethodHandle_klass() &&
 745             MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
 746       // Short-circuit lookups for JSR 292-related call sites.
 747       // That is, do not rely only on name-based lookups, because they may fail
 748       // if the names are not resolvable in the boot class loader (7056328).
 749       switch (bc) {
 750       case Bytecodes::_invokevirtual:
 751       case Bytecodes::_invokeinterface:
 752       case Bytecodes::_invokespecial:
 753       case Bytecodes::_invokestatic:
 754         {
 755           Method* m = ConstantPool::method_at_if_loaded(cpool, index);
 756           if (m != NULL) {
 757             return get_method(m);
 758           }
 759         }
 760         break;
 761       }
 762     }
 763 
 764     if (holder_is_accessible) {  // Our declared holder is loaded.
 765       InstanceKlass* lookup = declared_holder->get_instanceKlass();
 766       Method* m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
 767       if (m != NULL &&
 768           (bc == Bytecodes::_invokestatic
 769            ?  m->method_holder()->is_not_initialized()
 770            : !m->method_holder()->is_loaded())) {
 771         m = NULL;
 772       }
 773 #ifdef ASSERT
 774       if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
 775         m = NULL;
 776       }
 777 #endif
 778       if (m != NULL) {
 779         // We found the method.
 780         return get_method(m);
 781       }
 782     }
 783 
 784     // Either the declared holder was not loaded, or the method could
 785     // not be found.  Create a dummy ciMethod to represent the failed
 786     // lookup.
 787     ciSymbol* name      = get_symbol(name_sym);
 788     ciSymbol* signature = get_symbol(sig_sym);
 789     return get_unloaded_method(declared_holder, name, signature, accessor);
 790   }
 791 }
 792 
 793 
 794 // ------------------------------------------------------------------
 795 // ciEnv::get_instance_klass_for_declared_method_holder
 796 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
 797   // For the case of <array>.clone(), the method holder can be a ciArrayKlass
 798   // instead of a ciInstanceKlass.  For that case simply pretend that the
 799   // declared holder is Object.clone since that's where the call will bottom out.
 800   // A more correct fix would trickle out through many interfaces in CI,
 801   // requiring ciInstanceKlass* to become ciKlass* and many more places would
 802   // require checks to make sure the expected type was found.  Given that this
 803   // only occurs for clone() the more extensive fix seems like overkill so
 804   // instead we simply smear the array type into Object.
 805   guarantee(method_holder != NULL, "no method holder");
 806   if (method_holder->is_instance_klass()) {
 807     return method_holder->as_instance_klass();
 808   } else if (method_holder->is_array_klass()) {
 809     return current()->Object_klass();
 810   } else {
 811     ShouldNotReachHere();
 812   }
 813   return NULL;
 814 }
 815 
 816 
 817 // ------------------------------------------------------------------
 818 // ciEnv::get_method_by_index
 819 ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool,
 820                                      int index, Bytecodes::Code bc,
 821                                      ciInstanceKlass* accessor) {
 822   GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
 823 }
 824 
 825 
 826 // ------------------------------------------------------------------
 827 // ciEnv::name_buffer
 828 char *ciEnv::name_buffer(int req_len) {
 829   if (_name_buffer_len < req_len) {
 830     if (_name_buffer == NULL) {
 831       _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
 832       _name_buffer_len = req_len;
 833     } else {
 834       _name_buffer =
 835         (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
 836       _name_buffer_len = req_len;
 837     }
 838   }
 839   return _name_buffer;
 840 }
 841 
 842 // ------------------------------------------------------------------
 843 // ciEnv::is_in_vm
 844 bool ciEnv::is_in_vm() {
 845   return JavaThread::current()->thread_state() == _thread_in_vm;
 846 }
 847 
 848 bool ciEnv::system_dictionary_modification_counter_changed() {
 849   return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
 850 }
 851 
 852 // ------------------------------------------------------------------
 853 // ciEnv::validate_compile_task_dependencies
 854 //
 855 // Check for changes during compilation (e.g. class loads, evolution,
 856 // breakpoints, call site invalidation).
 857 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
 858   if (failing())  return;  // no need for further checks
 859 
 860   // First, check non-klass dependencies as we might return early and
 861   // not check klass dependencies if the system dictionary
 862   // modification counter hasn't changed (see below).
 863   for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
 864     if (deps.is_klass_type())  continue;  // skip klass dependencies
 865     Klass* witness = deps.check_dependency();
 866     if (witness != NULL) {
 867       record_failure("invalid non-klass dependency");
 868       return;
 869     }
 870   }
 871 
 872   // Klass dependencies must be checked when the system dictionary
 873   // changes.  If logging is enabled all violated dependences will be
 874   // recorded in the log.  In debug mode check dependencies even if
 875   // the system dictionary hasn't changed to verify that no invalid
 876   // dependencies were inserted.  Any violated dependences in this
 877   // case are dumped to the tty.
 878   bool counter_changed = system_dictionary_modification_counter_changed();
 879 
 880   bool verify_deps = trueInDebug;
 881   if (!counter_changed && !verify_deps)  return;
 882 
 883   int klass_violations = 0;
 884   for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
 885     if (!deps.is_klass_type())  continue;  // skip non-klass dependencies
 886     Klass* witness = deps.check_dependency();
 887     if (witness != NULL) {
 888       klass_violations++;
 889       if (!counter_changed) {
 890         // Dependence failed but counter didn't change.  Log a message
 891         // describing what failed and allow the assert at the end to
 892         // trigger.
 893         deps.print_dependency(witness);
 894       } else if (xtty == NULL) {
 895         // If we're not logging then a single violation is sufficient,
 896         // otherwise we want to log all the dependences which were
 897         // violated.
 898         break;
 899       }
 900     }
 901   }
 902 
 903   if (klass_violations != 0) {
 904 #ifdef ASSERT
 905     if (!counter_changed && !PrintCompilation) {
 906       // Print out the compile task that failed
 907       _task->print_line();
 908     }
 909 #endif
 910     assert(counter_changed, "failed dependencies, but counter didn't change");
 911     record_failure("concurrent class loading");
 912   }
 913 }
 914 
 915 // ------------------------------------------------------------------
 916 // ciEnv::register_method
 917 void ciEnv::register_method(ciMethod* target,
 918                             int entry_bci,
 919                             CodeOffsets* offsets,
 920                             int orig_pc_offset,
 921                             CodeBuffer* code_buffer,
 922                             int frame_words,
 923                             OopMapSet* oop_map_set,
 924                             ExceptionHandlerTable* handler_table,
 925                             ImplicitExceptionTable* inc_table,
 926                             AbstractCompiler* compiler,
 927                             int comp_level,
 928                             bool has_unsafe_access,
 929                             bool has_wide_vectors) {
 930   VM_ENTRY_MARK;
 931   nmethod* nm = NULL;
 932   {
 933     // To prevent compile queue updates.
 934     MutexLocker locker(MethodCompileQueue_lock, THREAD);
 935 
 936     // Prevent SystemDictionary::add_to_hierarchy from running
 937     // and invalidating our dependencies until we install this method.
 938     MutexLocker ml(Compile_lock);
 939 
 940     // Change in Jvmti state may invalidate compilation.
 941     if (!failing() &&
 942         ( (!jvmti_can_hotswap_or_post_breakpoint() &&
 943            JvmtiExport::can_hotswap_or_post_breakpoint()) ||
 944           (!jvmti_can_access_local_variables() &&
 945            JvmtiExport::can_access_local_variables()) ||
 946           (!jvmti_can_post_on_exceptions() &&
 947            JvmtiExport::can_post_on_exceptions()) )) {
 948       record_failure("Jvmti state change invalidated dependencies");
 949     }
 950 
 951     // Change in DTrace flags may invalidate compilation.
 952     if (!failing() &&
 953         ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
 954           (!dtrace_method_probes() && DTraceMethodProbes) ||
 955           (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
 956       record_failure("DTrace flags change invalidated dependencies");
 957     }
 958 
 959     if (!failing()) {
 960       if (log() != NULL) {
 961         // Log the dependencies which this compilation declares.
 962         dependencies()->log_all_dependencies();
 963       }
 964 
 965       // Encode the dependencies now, so we can check them right away.
 966       dependencies()->encode_content_bytes();
 967 
 968       // Check for {class loads, evolution, breakpoints, ...} during compilation
 969       validate_compile_task_dependencies(target);
 970     }
 971 
 972     methodHandle method(THREAD, target->get_Method());
 973 
 974     if (failing()) {
 975       // While not a true deoptimization, it is a preemptive decompile.
 976       MethodData* mdo = method()->method_data();
 977       if (mdo != NULL) {
 978         mdo->inc_decompile_count();
 979       }
 980 
 981       // All buffers in the CodeBuffer are allocated in the CodeCache.
 982       // If the code buffer is created on each compile attempt
 983       // as in C2, then it must be freed.
 984       code_buffer->free_blob();
 985       return;
 986     }
 987 
 988     assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
 989     assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
 990 
 991     nm =  nmethod::new_nmethod(method,
 992                                compile_id(),
 993                                entry_bci,
 994                                offsets,
 995                                orig_pc_offset,
 996                                debug_info(), dependencies(), code_buffer,
 997                                frame_words, oop_map_set,
 998                                handler_table, inc_table,
 999                                compiler, comp_level);
1000 
1001     // Free codeBlobs
1002     code_buffer->free_blob();
1003 
1004     // stress test 6243940 by immediately making the method
1005     // non-entrant behind the system's back. This has serious
1006     // side effects on the code cache and is not meant for
1007     // general stress testing
1008     if (nm != NULL && StressNonEntrant) {
1009       MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
1010       NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(),
1011                   SharedRuntime::get_handle_wrong_method_stub());
1012     }
1013 
1014     if (nm == NULL) {
1015       // The CodeCache is full.  Print out warning and disable compilation.
1016       record_failure("code cache is full");
1017       {
1018         MutexUnlocker ml(Compile_lock);
1019         MutexUnlocker locker(MethodCompileQueue_lock);
1020         CompileBroker::handle_full_code_cache();
1021       }
1022     } else {
1023       nm->set_has_unsafe_access(has_unsafe_access);
1024       nm->set_has_wide_vectors(has_wide_vectors);
1025 
1026       // Record successful registration.
1027       // (Put nm into the task handle *before* publishing to the Java heap.)
1028       if (task() != NULL)  task()->set_code(nm);
1029 
1030       if (entry_bci == InvocationEntryBci) {
1031         if (TieredCompilation) {
1032           // If there is an old version we're done with it
1033           nmethod* old = method->code();
1034           if (TraceMethodReplacement && old != NULL) {
1035             ResourceMark rm;
1036             char *method_name = method->name_and_sig_as_C_string();
1037             tty->print_cr("Replacing method %s", method_name);
1038           }
1039           if (old != NULL ) {
1040             old->make_not_entrant();
1041           }
1042         }
1043         if (TraceNMethodInstalls ) {
1044           ResourceMark rm;
1045           char *method_name = method->name_and_sig_as_C_string();
1046           ttyLocker ttyl;
1047           tty->print_cr("Installing method (%d) %s ",
1048                         comp_level,
1049                         method_name);
1050         }
1051         // Allow the code to be executed
1052         method->set_code(method, nm);
1053       } else {
1054         if (TraceNMethodInstalls ) {
1055           ResourceMark rm;
1056           char *method_name = method->name_and_sig_as_C_string();
1057           ttyLocker ttyl;
1058           tty->print_cr("Installing osr method (%d) %s @ %d",
1059                         comp_level,
1060                         method_name,
1061                         entry_bci);
1062         }
1063         method->method_holder()->add_osr_nmethod(nm);
1064 
1065       }
1066     }
1067   }
1068   // JVMTI -- compiled method notification (must be done outside lock)
1069   if (nm != NULL) {
1070     nm->post_compiled_method_load_event();
1071   }
1072 
1073 }
1074 
1075 
1076 // ------------------------------------------------------------------
1077 // ciEnv::find_system_klass
1078 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1079   VM_ENTRY_MARK;
1080   return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false);
1081 }
1082 
1083 // ------------------------------------------------------------------
1084 // ciEnv::comp_level
1085 int ciEnv::comp_level() {
1086   if (task() == NULL)  return CompLevel_highest_tier;
1087   return task()->comp_level();
1088 }
1089 
1090 // ------------------------------------------------------------------
1091 // ciEnv::compile_id
1092 uint ciEnv::compile_id() {
1093   if (task() == NULL)  return 0;
1094   return task()->compile_id();
1095 }
1096 
1097 // ------------------------------------------------------------------
1098 // ciEnv::notice_inlined_method()
1099 void ciEnv::notice_inlined_method(ciMethod* method) {
1100   _num_inlined_bytecodes += method->code_size_for_inlining();
1101 }
1102 
1103 // ------------------------------------------------------------------
1104 // ciEnv::num_inlined_bytecodes()
1105 int ciEnv::num_inlined_bytecodes() const {
1106   return _num_inlined_bytecodes;
1107 }
1108 
1109 // ------------------------------------------------------------------
1110 // ciEnv::record_failure()
1111 void ciEnv::record_failure(const char* reason) {
1112   if (log() != NULL) {
1113     log()->elem("failure reason='%s'", reason);
1114   }
1115   if (_failure_reason == NULL) {
1116     // Record the first failure reason.
1117     _failure_reason = reason;
1118   }
1119 }
1120 
1121 // ------------------------------------------------------------------
1122 // ciEnv::record_method_not_compilable()
1123 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1124   int new_compilable =
1125     all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1126 
1127   // Only note transitions to a worse state
1128   if (new_compilable > _compilable) {
1129     if (log() != NULL) {
1130       if (all_tiers) {
1131         log()->elem("method_not_compilable");
1132       } else {
1133         log()->elem("method_not_compilable_at_tier level='%d'",
1134                     current()->task()->comp_level());
1135       }
1136     }
1137     _compilable = new_compilable;
1138 
1139     // Reset failure reason; this one is more important.
1140     _failure_reason = NULL;
1141     record_failure(reason);
1142   }
1143 }
1144 
1145 // ------------------------------------------------------------------
1146 // ciEnv::record_out_of_memory_failure()
1147 void ciEnv::record_out_of_memory_failure() {
1148   // If memory is low, we stop compiling methods.
1149   record_method_not_compilable("out of memory");
1150 }
1151 
1152 ciInstance* ciEnv::unloaded_ciinstance() {
1153   GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1154 }
1155 
1156 // ------------------------------------------------------------------
1157 // ciEnv::dump_replay_data*
1158 
1159 // Don't change thread state and acquire any locks.
1160 // Safe to call from VM error reporter.
1161 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1162   ResourceMark rm;
1163 #if INCLUDE_JVMTI
1164   out->print_cr("JvmtiExport can_access_local_variables %d",     _jvmti_can_access_local_variables);
1165   out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1166   out->print_cr("JvmtiExport can_post_on_exceptions %d",         _jvmti_can_post_on_exceptions);
1167 #endif // INCLUDE_JVMTI
1168 
1169   GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1170   out->print_cr("# %d ciObject found", objects->length());
1171   for (int i = 0; i < objects->length(); i++) {
1172     objects->at(i)->dump_replay_data(out);
1173   }
1174   CompileTask* task = this->task();
1175   Method* method = task->method();
1176   int entry_bci = task->osr_bci();
1177   int comp_level = task->comp_level();
1178   // Klass holder = method->method_holder();
1179   out->print_cr("compile %s %s %s %d %d",
1180                 method->klass_name()->as_quoted_ascii(),
1181                 method->name()->as_quoted_ascii(),
1182                 method->signature()->as_quoted_ascii(),
1183                 entry_bci, comp_level);
1184   out->flush();
1185 }
1186 
1187 void ciEnv::dump_replay_data(outputStream* out) {
1188   GUARDED_VM_ENTRY(
1189     MutexLocker ml(Compile_lock);
1190     dump_replay_data_unsafe(out);
1191   )
1192 }