1 /*
   2  * Copyright (c) 1999, 2014, 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 "jfr/jfrEvents.hpp"
  44 #include "memory/allocation.inline.hpp"
  45 #include "memory/oopFactory.hpp"
  46 #include "memory/universe.inline.hpp"
  47 #include "oops/methodData.hpp"
  48 #include "oops/objArrayKlass.hpp"
  49 #include "oops/oop.inline.hpp"
  50 #include "oops/oop.inline2.hpp"
  51 #include "prims/jvmtiExport.hpp"
  52 #include "runtime/init.hpp"
  53 #include "runtime/reflection.hpp"
  54 #include "runtime/sharedRuntime.hpp"
  55 #include "runtime/thread.inline.hpp"
  56 #include "utilities/dtrace.hpp"
  57 #include "utilities/macros.hpp"
  58 #ifdef COMPILER1
  59 #include "c1/c1_Runtime1.hpp"
  60 #endif
  61 #ifdef COMPILER2
  62 #include "opto/runtime.hpp"
  63 #endif
  64 
  65 // ciEnv
  66 //
  67 // This class is the top level broker for requests from the compiler
  68 // to the VM.
  69 
  70 ciObject*              ciEnv::_null_object_instance;
  71 
  72 #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL;
  73 WK_KLASSES_DO(WK_KLASS_DEFN)
  74 #undef WK_KLASS_DEFN
  75 
  76 ciSymbol*        ciEnv::_unloaded_cisymbol = NULL;
  77 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
  78 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
  79 
  80 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
  81 jobject ciEnv::_ArrayStoreException_handle = NULL;
  82 jobject ciEnv::_ClassCastException_handle = NULL;
  83 
  84 #ifndef PRODUCT
  85 static bool firstEnv = true;
  86 #endif /* PRODUCT */
  87 
  88 // ------------------------------------------------------------------
  89 // ciEnv::ciEnv
  90 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter)
  91   : _ciEnv_arena(mtCompiler) {
  92   VM_ENTRY_MARK;
  93 
  94   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
  95   thread->set_env(this);
  96   assert(ciEnv::current() == this, "sanity");
  97 
  98   _oop_recorder = NULL;
  99   _debug_info = NULL;
 100   _dependencies = NULL;
 101   _failure_reason = NULL;
 102   _compilable = MethodCompilable;
 103   _break_at_compile = false;
 104   _compiler_data = NULL;
 105 #ifndef PRODUCT
 106   assert(!firstEnv, "not initialized properly");
 107 #endif /* !PRODUCT */
 108 
 109   _system_dictionary_modification_counter = system_dictionary_modification_counter;
 110   _num_inlined_bytecodes = 0;
 111   assert(task == NULL || thread->task() == task, "sanity");
 112   _task = task;
 113   _log = NULL;
 114 
 115   // Temporary buffer for creating symbols and such.
 116   _name_buffer = NULL;
 117   _name_buffer_len = 0;
 118 
 119   _arena   = &_ciEnv_arena;
 120   _factory = new (_arena) ciObjectFactory(_arena, 128);
 121 
 122   // Preload commonly referenced system ciObjects.
 123 
 124   // During VM initialization, these instances have not yet been created.
 125   // Assertions ensure that these instances are not accessed before
 126   // their initialization.
 127 
 128   assert(Universe::is_fully_initialized(), "should be complete");
 129 
 130   oop o = Universe::null_ptr_exception_instance();
 131   assert(o != NULL, "should have been initialized");
 132   _NullPointerException_instance = get_object(o)->as_instance();
 133   o = Universe::arithmetic_exception_instance();
 134   assert(o != NULL, "should have been initialized");
 135   _ArithmeticException_instance = get_object(o)->as_instance();
 136 
 137   _ArrayIndexOutOfBoundsException_instance = NULL;
 138   _ArrayStoreException_instance = NULL;
 139   _ClassCastException_instance = NULL;
 140   _the_null_string = NULL;
 141   _the_min_jint_string = NULL;
 142 }
 143 
 144 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
 145   ASSERT_IN_VM;
 146 
 147   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
 148   CompilerThread* current_thread = CompilerThread::current();
 149   assert(current_thread->env() == NULL, "must be");
 150   current_thread->set_env(this);
 151   assert(ciEnv::current() == this, "sanity");
 152 
 153   _oop_recorder = NULL;
 154   _debug_info = NULL;
 155   _dependencies = NULL;
 156   _failure_reason = NULL;
 157   _compilable = MethodCompilable_never;
 158   _break_at_compile = false;
 159   _compiler_data = NULL;
 160 #ifndef PRODUCT
 161   assert(firstEnv, "must be first");
 162   firstEnv = false;
 163 #endif /* !PRODUCT */
 164 
 165   _system_dictionary_modification_counter = 0;
 166   _num_inlined_bytecodes = 0;
 167   _task = NULL;
 168   _log = NULL;
 169 
 170   // Temporary buffer for creating symbols and such.
 171   _name_buffer = NULL;
 172   _name_buffer_len = 0;
 173 
 174   _arena   = arena;
 175   _factory = new (_arena) ciObjectFactory(_arena, 128);
 176 
 177   // Preload commonly referenced system ciObjects.
 178 
 179   // During VM initialization, these instances have not yet been created.
 180   // Assertions ensure that these instances are not accessed before
 181   // their initialization.
 182 
 183   assert(Universe::is_fully_initialized(), "must be");
 184 
 185   _NullPointerException_instance = NULL;
 186   _ArithmeticException_instance = NULL;
 187   _ArrayIndexOutOfBoundsException_instance = NULL;
 188   _ArrayStoreException_instance = NULL;
 189   _ClassCastException_instance = NULL;
 190   _the_null_string = NULL;
 191   _the_min_jint_string = NULL;
 192 }
 193 
 194 ciEnv::~ciEnv() {
 195   CompilerThread* current_thread = CompilerThread::current();
 196   _factory->remove_symbols();
 197   // Need safepoint to clear the env on the thread.  RedefineClasses might
 198   // be reading it.
 199   GUARDED_VM_ENTRY(current_thread->set_env(NULL);)
 200 }
 201 
 202 // ------------------------------------------------------------------
 203 // Cache Jvmti state
 204 void ciEnv::cache_jvmti_state() {
 205   VM_ENTRY_MARK;
 206   // Get Jvmti capabilities under lock to get consistant values.
 207   MutexLocker mu(JvmtiThreadState_lock);
 208   _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
 209   _jvmti_can_access_local_variables     = JvmtiExport::can_access_local_variables();
 210   _jvmti_can_post_on_exceptions         = JvmtiExport::can_post_on_exceptions();
 211 }
 212 
 213 // ------------------------------------------------------------------
 214 // Cache DTrace flags
 215 void ciEnv::cache_dtrace_flags() {
 216   // Need lock?
 217   _dtrace_extended_probes = ExtendedDTraceProbes;
 218   if (_dtrace_extended_probes) {
 219     _dtrace_monitor_probes  = true;
 220     _dtrace_method_probes   = true;
 221     _dtrace_alloc_probes    = true;
 222   } else {
 223     _dtrace_monitor_probes  = DTraceMonitorProbes;
 224     _dtrace_method_probes   = DTraceMethodProbes;
 225     _dtrace_alloc_probes    = DTraceAllocProbes;
 226   }
 227 }
 228 
 229 // ------------------------------------------------------------------
 230 // helper for lazy exception creation
 231 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
 232   VM_ENTRY_MARK;
 233   if (handle == NULL) {
 234     // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
 235     Klass* k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
 236     jobject objh = NULL;
 237     if (!HAS_PENDING_EXCEPTION && k != NULL) {
 238       oop obj = InstanceKlass::cast(k)->allocate_instance(THREAD);
 239       if (!HAS_PENDING_EXCEPTION)
 240         objh = JNIHandles::make_global(obj);
 241     }
 242     if (HAS_PENDING_EXCEPTION) {
 243       CLEAR_PENDING_EXCEPTION;
 244     } else {
 245       handle = objh;
 246     }
 247   }
 248   oop obj = JNIHandles::resolve(handle);
 249   return obj == NULL? NULL: get_object(obj)->as_instance();
 250 }
 251 
 252 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
 253   if (_ArrayIndexOutOfBoundsException_instance == NULL) {
 254     _ArrayIndexOutOfBoundsException_instance
 255           = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
 256           vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 257   }
 258   return _ArrayIndexOutOfBoundsException_instance;
 259 }
 260 ciInstance* ciEnv::ArrayStoreException_instance() {
 261   if (_ArrayStoreException_instance == NULL) {
 262     _ArrayStoreException_instance
 263           = get_or_create_exception(_ArrayStoreException_handle,
 264           vmSymbols::java_lang_ArrayStoreException());
 265   }
 266   return _ArrayStoreException_instance;
 267 }
 268 ciInstance* ciEnv::ClassCastException_instance() {
 269   if (_ClassCastException_instance == NULL) {
 270     _ClassCastException_instance
 271           = get_or_create_exception(_ClassCastException_handle,
 272           vmSymbols::java_lang_ClassCastException());
 273   }
 274   return _ClassCastException_instance;
 275 }
 276 
 277 ciInstance* ciEnv::the_null_string() {
 278   if (_the_null_string == NULL) {
 279     VM_ENTRY_MARK;
 280     _the_null_string = get_object(Universe::the_null_string())->as_instance();
 281   }
 282   return _the_null_string;
 283 }
 284 
 285 ciInstance* ciEnv::the_min_jint_string() {
 286   if (_the_min_jint_string == NULL) {
 287     VM_ENTRY_MARK;
 288     _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
 289   }
 290   return _the_min_jint_string;
 291 }
 292 
 293 // ------------------------------------------------------------------
 294 // ciEnv::get_method_from_handle
 295 ciMethod* ciEnv::get_method_from_handle(Method* method) {
 296   VM_ENTRY_MARK;
 297   return get_metadata(method)->as_method();
 298 }
 299 
 300 // ------------------------------------------------------------------
 301 // ciEnv::array_element_offset_in_bytes
 302 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
 303   VM_ENTRY_MARK;
 304   objArrayOop a = (objArrayOop)a_h->get_oop();
 305   assert(a->is_objArray(), "");
 306   int length = a->length();
 307   oop o = o_h->get_oop();
 308   for (int i = 0; i < length; i++) {
 309     if (a->obj_at(i) == o)  return i;
 310   }
 311   return -1;
 312 }
 313 
 314 
 315 // ------------------------------------------------------------------
 316 // ciEnv::check_klass_accessiblity
 317 //
 318 // Note: the logic of this method should mirror the logic of
 319 // ConstantPool::verify_constant_pool_resolve.
 320 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
 321                                       Klass* resolved_klass) {
 322   if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
 323     return true;
 324   }
 325   if (accessing_klass->is_obj_array_klass()) {
 326     accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
 327   }
 328   if (!accessing_klass->is_instance_klass()) {
 329     return true;
 330   }
 331 
 332   if (resolved_klass->oop_is_objArray()) {
 333     // Find the element klass, if this is an array.
 334     resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
 335   }
 336   if (resolved_klass->oop_is_instance()) {
 337     return Reflection::verify_class_access(accessing_klass->get_Klass(),
 338                                            resolved_klass,
 339                                            true);
 340   }
 341   return true;
 342 }
 343 
 344 // ------------------------------------------------------------------
 345 // ciEnv::get_klass_by_name_impl
 346 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
 347                                        constantPoolHandle cpool,
 348                                        ciSymbol* name,
 349                                        bool require_local) {
 350   ASSERT_IN_VM;
 351   EXCEPTION_CONTEXT;
 352 
 353   // Now we need to check the SystemDictionary
 354   Symbol* sym = name->get_symbol();
 355   if (sym->byte_at(0) == 'L' &&
 356     sym->byte_at(sym->utf8_length()-1) == ';') {
 357     // This is a name from a signature.  Strip off the trimmings.
 358     // Call recursive to keep scope of strippedsym.
 359     TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
 360                     sym->utf8_length()-2,
 361                     KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
 362     ciSymbol* strippedname = get_symbol(strippedsym);
 363     return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
 364   }
 365 
 366   // Check for prior unloaded klass.  The SystemDictionary's answers
 367   // can vary over time but the compiler needs consistency.
 368   ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
 369   if (unloaded_klass != NULL) {
 370     if (require_local)  return NULL;
 371     return unloaded_klass;
 372   }
 373 
 374   Handle loader(THREAD, (oop)NULL);
 375   Handle domain(THREAD, (oop)NULL);
 376   if (accessing_klass != NULL) {
 377     loader = Handle(THREAD, accessing_klass->loader());
 378     domain = Handle(THREAD, accessing_klass->protection_domain());
 379   }
 380 
 381   // setup up the proper type to return on OOM
 382   ciKlass* fail_type;
 383   if (sym->byte_at(0) == '[') {
 384     fail_type = _unloaded_ciobjarrayklass;
 385   } else {
 386     fail_type = _unloaded_ciinstance_klass;
 387   }
 388   KlassHandle found_klass;
 389   {
 390     ttyUnlocker ttyul;  // release tty lock to avoid ordering problems
 391     MutexLocker ml(Compile_lock);
 392     Klass* kls;
 393     if (!require_local) {
 394       kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
 395                                                                        KILL_COMPILE_ON_FATAL_(fail_type));
 396     } else {
 397       kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
 398                                                            KILL_COMPILE_ON_FATAL_(fail_type));
 399     }
 400     found_klass = KlassHandle(THREAD, kls);
 401   }
 402 
 403   // If we fail to find an array klass, look again for its element type.
 404   // The element type may be available either locally or via constraints.
 405   // In either case, if we can find the element type in the system dictionary,
 406   // we must build an array type around it.  The CI requires array klasses
 407   // to be loaded if their element klasses are loaded, except when memory
 408   // is exhausted.
 409   if (sym->byte_at(0) == '[' &&
 410       (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
 411     // We have an unloaded array.
 412     // Build it on the fly if the element class exists.
 413     TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
 414                                                  sym->utf8_length()-1,
 415                                                  KILL_COMPILE_ON_FATAL_(fail_type));
 416 
 417     // Get element ciKlass recursively.
 418     ciKlass* elem_klass =
 419       get_klass_by_name_impl(accessing_klass,
 420                              cpool,
 421                              get_symbol(elem_sym),
 422                              require_local);
 423     if (elem_klass != NULL && elem_klass->is_loaded()) {
 424       // Now make an array for it
 425       return ciObjArrayKlass::make_impl(elem_klass);
 426     }
 427   }
 428 
 429   if (found_klass() == NULL && !cpool.is_null() && cpool->has_preresolution()) {
 430     // Look inside the constant pool for pre-resolved class entries.
 431     for (int i = cpool->length() - 1; i >= 1; i--) {
 432       if (cpool->tag_at(i).is_klass()) {
 433         Klass* kls = cpool->resolved_klass_at(i);
 434         if (kls->name() == sym) {
 435           found_klass = KlassHandle(THREAD, kls);
 436           break;
 437         }
 438       }
 439     }
 440   }
 441 
 442   if (found_klass() != NULL) {
 443     // Found it.  Build a CI handle.
 444     return get_klass(found_klass());
 445   }
 446 
 447   if (require_local)  return NULL;
 448 
 449   // Not yet loaded into the VM, or not governed by loader constraints.
 450   // Make a CI representative for it.
 451   return get_unloaded_klass(accessing_klass, name);
 452 }
 453 
 454 // ------------------------------------------------------------------
 455 // ciEnv::get_klass_by_name
 456 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
 457                                   ciSymbol* klass_name,
 458                                   bool require_local) {
 459   GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
 460                                                  constantPoolHandle(),
 461                                                  klass_name,
 462                                                  require_local);)
 463 }
 464 
 465 // ------------------------------------------------------------------
 466 // ciEnv::get_klass_by_index_impl
 467 //
 468 // Implementation of get_klass_by_index.
 469 ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool,
 470                                         int index,
 471                                         bool& is_accessible,
 472                                         ciInstanceKlass* accessor) {
 473   EXCEPTION_CONTEXT;
 474   KlassHandle klass; // = NULL;
 475   Symbol* klass_name = NULL;
 476 
 477   if (cpool->tag_at(index).is_symbol()) {
 478     klass_name = cpool->symbol_at(index);
 479   } else {
 480     // Check if it's resolved if it's not a symbol constant pool entry.
 481     klass = KlassHandle(THREAD, ConstantPool::klass_at_if_loaded(cpool, index));
 482 
 483   if (klass.is_null()) {
 484     // The klass has not been inserted into the constant pool.
 485     // Try to look it up by name.
 486     {
 487       // We have to lock the cpool to keep the oop from being resolved
 488       // while we are accessing it.
 489         MonitorLockerEx ml(cpool->lock());
 490       constantTag tag = cpool->tag_at(index);
 491       if (tag.is_klass()) {
 492         // The klass has been inserted into the constant pool
 493         // very recently.
 494         klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
 495       } else {
 496         assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
 497         klass_name = cpool->unresolved_klass_at(index);
 498       }
 499     }
 500   }
 501   }
 502 
 503   if (klass.is_null()) {
 504     // Not found in constant pool.  Use the name to do the lookup.
 505     ciKlass* k = get_klass_by_name_impl(accessor,
 506                                         cpool,
 507                                         get_symbol(klass_name),
 508                                         false);
 509     // Calculate accessibility the hard way.
 510     if (!k->is_loaded()) {
 511       is_accessible = false;
 512     } else if (k->loader() != accessor->loader() &&
 513                get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
 514       // Loaded only remotely.  Not linked yet.
 515       is_accessible = false;
 516     } else {
 517       // Linked locally, and we must also check public/private, etc.
 518       is_accessible = check_klass_accessibility(accessor, k->get_Klass());
 519     }
 520     return k;
 521   }
 522 
 523   // Check for prior unloaded klass.  The SystemDictionary's answers
 524   // can vary over time but the compiler needs consistency.
 525   ciSymbol* name = get_symbol(klass()->name());
 526   ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
 527   if (unloaded_klass != NULL) {
 528     is_accessible = false;
 529     return unloaded_klass;
 530   }
 531 
 532   // It is known to be accessible, since it was found in the constant pool.
 533   is_accessible = true;
 534   return get_klass(klass());
 535 }
 536 
 537 // ------------------------------------------------------------------
 538 // ciEnv::get_klass_by_index
 539 //
 540 // Get a klass from the constant pool.
 541 ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool,
 542                                    int index,
 543                                    bool& is_accessible,
 544                                    ciInstanceKlass* accessor) {
 545   GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
 546 }
 547 
 548 // ------------------------------------------------------------------
 549 // ciEnv::get_constant_by_index_impl
 550 //
 551 // Implementation of get_constant_by_index().
 552 ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool,
 553                                              int pool_index, int cache_index,
 554                                              ciInstanceKlass* accessor) {
 555   bool ignore_will_link;
 556   EXCEPTION_CONTEXT;
 557   int index = pool_index;
 558   if (cache_index >= 0) {
 559     assert(index < 0, "only one kind of index at a time");
 560     oop obj = cpool->resolved_references()->obj_at(cache_index);
 561     if (obj != NULL) {
 562       ciObject* ciobj = get_object(obj);
 563       if (ciobj->is_array()) {
 564         return ciConstant(T_ARRAY, ciobj);
 565       } else {
 566         assert(ciobj->is_instance(), "should be an instance");
 567         return ciConstant(T_OBJECT, ciobj);
 568       }
 569     }
 570     index = cpool->object_to_cp_index(cache_index);
 571   }
 572   constantTag tag = cpool->tag_at(index);
 573   if (tag.is_int()) {
 574     return ciConstant(T_INT, (jint)cpool->int_at(index));
 575   } else if (tag.is_long()) {
 576     return ciConstant((jlong)cpool->long_at(index));
 577   } else if (tag.is_float()) {
 578     return ciConstant((jfloat)cpool->float_at(index));
 579   } else if (tag.is_double()) {
 580     return ciConstant((jdouble)cpool->double_at(index));
 581   } else if (tag.is_string()) {
 582     oop string = NULL;
 583     assert(cache_index >= 0, "should have a cache index");
 584     if (cpool->is_pseudo_string_at(index)) {
 585       string = cpool->pseudo_string_at(index, cache_index);
 586     } else {
 587       string = cpool->string_at(index, cache_index, THREAD);
 588       if (HAS_PENDING_EXCEPTION) {
 589         CLEAR_PENDING_EXCEPTION;
 590         record_out_of_memory_failure();
 591         return ciConstant();
 592       }
 593     }
 594     ciObject* constant = get_object(string);
 595     if (constant->is_array()) {
 596       return ciConstant(T_ARRAY, constant);
 597     } else {
 598       assert (constant->is_instance(), "must be an instance, or not? ");
 599       return ciConstant(T_OBJECT, constant);
 600     }
 601   } else if (tag.is_klass() || tag.is_unresolved_klass()) {
 602     // 4881222: allow ldc to take a class type
 603     ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
 604     if (HAS_PENDING_EXCEPTION) {
 605       CLEAR_PENDING_EXCEPTION;
 606       record_out_of_memory_failure();
 607       return ciConstant();
 608     }
 609     assert (klass->is_instance_klass() || klass->is_array_klass(),
 610             "must be an instance or array klass ");
 611     return ciConstant(T_OBJECT, klass->java_mirror());
 612   } else if (tag.is_method_type()) {
 613     // must execute Java code to link this CP entry into cache[i].f1
 614     ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
 615     ciObject* ciobj = get_unloaded_method_type_constant(signature);
 616     return ciConstant(T_OBJECT, ciobj);
 617   } else if (tag.is_method_handle()) {
 618     // must execute Java code to link this CP entry into cache[i].f1
 619     int ref_kind        = cpool->method_handle_ref_kind_at(index);
 620     int callee_index    = cpool->method_handle_klass_index_at(index);
 621     ciKlass* callee     = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
 622     ciSymbol* name      = get_symbol(cpool->method_handle_name_ref_at(index));
 623     ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
 624     ciObject* ciobj     = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
 625     return ciConstant(T_OBJECT, ciobj);
 626   } else {
 627     ShouldNotReachHere();
 628     return ciConstant();
 629   }
 630 }
 631 
 632 // ------------------------------------------------------------------
 633 // ciEnv::get_constant_by_index
 634 //
 635 // Pull a constant out of the constant pool.  How appropriate.
 636 //
 637 // Implementation note: this query is currently in no way cached.
 638 ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool,
 639                                         int pool_index, int cache_index,
 640                                         ciInstanceKlass* accessor) {
 641   GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
 642 }
 643 
 644 // ------------------------------------------------------------------
 645 // ciEnv::get_field_by_index_impl
 646 //
 647 // Implementation of get_field_by_index.
 648 //
 649 // Implementation note: the results of field lookups are cached
 650 // in the accessor klass.
 651 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
 652                                         int index) {
 653   ciConstantPoolCache* cache = accessor->field_cache();
 654   if (cache == NULL) {
 655     ciField* field = new (arena()) ciField(accessor, index);
 656     return field;
 657   } else {
 658     ciField* field = (ciField*)cache->get(index);
 659     if (field == NULL) {
 660       field = new (arena()) ciField(accessor, index);
 661       cache->insert(index, field);
 662     }
 663     return field;
 664   }
 665 }
 666 
 667 // ------------------------------------------------------------------
 668 // ciEnv::get_field_by_index
 669 //
 670 // Get a field by index from a klass's constant pool.
 671 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
 672                                    int index) {
 673   GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
 674 }
 675 
 676 // ------------------------------------------------------------------
 677 // ciEnv::lookup_method
 678 //
 679 // Perform an appropriate method lookup based on accessor, holder,
 680 // name, signature, and bytecode.
 681 Method* ciEnv::lookup_method(InstanceKlass*  accessor,
 682                                InstanceKlass*  holder,
 683                                Symbol*       name,
 684                                Symbol*       sig,
 685                                Bytecodes::Code bc) {
 686   EXCEPTION_CONTEXT;
 687   KlassHandle h_accessor(THREAD, accessor);
 688   KlassHandle h_holder(THREAD, holder);
 689   LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
 690   methodHandle dest_method;
 691   switch (bc) {
 692   case Bytecodes::_invokestatic:
 693     dest_method =
 694       LinkResolver::resolve_static_call_or_null(h_holder, name, sig, h_accessor);
 695     break;
 696   case Bytecodes::_invokespecial:
 697     dest_method =
 698       LinkResolver::resolve_special_call_or_null(h_holder, name, sig, h_accessor);
 699     break;
 700   case Bytecodes::_invokeinterface:
 701     dest_method =
 702       LinkResolver::linktime_resolve_interface_method_or_null(h_holder, name, sig,
 703                                                               h_accessor, true);
 704     break;
 705   case Bytecodes::_invokevirtual:
 706     dest_method =
 707       LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, name, sig,
 708                                                             h_accessor, true);
 709     break;
 710   default: ShouldNotReachHere();
 711   }
 712 
 713   return dest_method();
 714 }
 715 
 716 
 717 // ------------------------------------------------------------------
 718 // ciEnv::get_method_by_index_impl
 719 ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool,
 720                                           int index, Bytecodes::Code bc,
 721                                           ciInstanceKlass* accessor) {
 722   if (bc == Bytecodes::_invokedynamic) {
 723     ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
 724     bool is_resolved = !cpce->is_f1_null();
 725     // FIXME: code generation could allow for null (unlinked) call site
 726     // The call site could be made patchable as follows:
 727     // Load the appendix argument from the constant pool.
 728     // Test the appendix argument and jump to a known deopt routine if it is null.
 729     // Jump through a patchable call site, which is initially a deopt routine.
 730     // Patch the call site to the nmethod entry point of the static compiled lambda form.
 731     // As with other two-component call sites, both values must be independently verified.
 732 
 733     if (is_resolved) {
 734       // Get the invoker Method* from the constant pool.
 735       // (The appendix argument, if any, will be noted in the method's signature.)
 736       Method* adapter = cpce->f1_as_method();
 737       return get_method(adapter);
 738     }
 739 
 740     // Fake a method that is equivalent to a declared method.
 741     ciInstanceKlass* holder    = get_instance_klass(SystemDictionary::MethodHandle_klass());
 742     ciSymbol*        name      = ciSymbol::invokeBasic_name();
 743     ciSymbol*        signature = get_symbol(cpool->signature_ref_at(index));
 744     return get_unloaded_method(holder, name, signature, accessor);
 745   } else {
 746     const int holder_index = cpool->klass_ref_index_at(index);
 747     bool holder_is_accessible;
 748     ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
 749     ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
 750 
 751     // Get the method's name and signature.
 752     Symbol* name_sym = cpool->name_ref_at(index);
 753     Symbol* sig_sym  = cpool->signature_ref_at(index);
 754 
 755     if (cpool->has_preresolution()
 756         || (holder == ciEnv::MethodHandle_klass() &&
 757             MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
 758       // Short-circuit lookups for JSR 292-related call sites.
 759       // That is, do not rely only on name-based lookups, because they may fail
 760       // if the names are not resolvable in the boot class loader (7056328).
 761       switch (bc) {
 762       case Bytecodes::_invokevirtual:
 763       case Bytecodes::_invokeinterface:
 764       case Bytecodes::_invokespecial:
 765       case Bytecodes::_invokestatic:
 766         {
 767           Method* m = ConstantPool::method_at_if_loaded(cpool, index);
 768           if (m != NULL) {
 769             return get_method(m);
 770           }
 771         }
 772         break;
 773       }
 774     }
 775 
 776     if (holder_is_accessible) {  // Our declared holder is loaded.
 777       InstanceKlass* lookup = declared_holder->get_instanceKlass();
 778       Method* m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
 779       if (m != NULL &&
 780           (bc == Bytecodes::_invokestatic
 781            ?  m->method_holder()->is_not_initialized()
 782            : !m->method_holder()->is_loaded())) {
 783         m = NULL;
 784       }
 785 #ifdef ASSERT
 786       if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
 787         m = NULL;
 788       }
 789 #endif
 790       if (m != NULL) {
 791         // We found the method.
 792         return get_method(m);
 793       }
 794     }
 795 
 796     // Either the declared holder was not loaded, or the method could
 797     // not be found.  Create a dummy ciMethod to represent the failed
 798     // lookup.
 799     ciSymbol* name      = get_symbol(name_sym);
 800     ciSymbol* signature = get_symbol(sig_sym);
 801     return get_unloaded_method(declared_holder, name, signature, accessor);
 802   }
 803 }
 804 
 805 
 806 // ------------------------------------------------------------------
 807 // ciEnv::get_instance_klass_for_declared_method_holder
 808 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
 809   // For the case of <array>.clone(), the method holder can be a ciArrayKlass
 810   // instead of a ciInstanceKlass.  For that case simply pretend that the
 811   // declared holder is Object.clone since that's where the call will bottom out.
 812   // A more correct fix would trickle out through many interfaces in CI,
 813   // requiring ciInstanceKlass* to become ciKlass* and many more places would
 814   // require checks to make sure the expected type was found.  Given that this
 815   // only occurs for clone() the more extensive fix seems like overkill so
 816   // instead we simply smear the array type into Object.
 817   guarantee(method_holder != NULL, "no method holder");
 818   if (method_holder->is_instance_klass()) {
 819     return method_holder->as_instance_klass();
 820   } else if (method_holder->is_array_klass()) {
 821     return current()->Object_klass();
 822   } else {
 823     ShouldNotReachHere();
 824   }
 825   return NULL;
 826 }
 827 
 828 
 829 // ------------------------------------------------------------------
 830 // ciEnv::get_method_by_index
 831 ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool,
 832                                      int index, Bytecodes::Code bc,
 833                                      ciInstanceKlass* accessor) {
 834   GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
 835 }
 836 
 837 
 838 // ------------------------------------------------------------------
 839 // ciEnv::name_buffer
 840 char *ciEnv::name_buffer(int req_len) {
 841   if (_name_buffer_len < req_len) {
 842     if (_name_buffer == NULL) {
 843       _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
 844       _name_buffer_len = req_len;
 845     } else {
 846       _name_buffer =
 847         (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
 848       _name_buffer_len = req_len;
 849     }
 850   }
 851   return _name_buffer;
 852 }
 853 
 854 // ------------------------------------------------------------------
 855 // ciEnv::is_in_vm
 856 bool ciEnv::is_in_vm() {
 857   return JavaThread::current()->thread_state() == _thread_in_vm;
 858 }
 859 
 860 bool ciEnv::system_dictionary_modification_counter_changed() {
 861   return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
 862 }
 863 
 864 // ------------------------------------------------------------------
 865 // ciEnv::validate_compile_task_dependencies
 866 //
 867 // Check for changes during compilation (e.g. class loads, evolution,
 868 // breakpoints, call site invalidation).
 869 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
 870   if (failing())  return;  // no need for further checks
 871 
 872   // First, check non-klass dependencies as we might return early and
 873   // not check klass dependencies if the system dictionary
 874   // modification counter hasn't changed (see below).
 875   for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
 876     if (deps.is_klass_type())  continue;  // skip klass dependencies
 877     Klass* witness = deps.check_dependency();
 878     if (witness != NULL) {
 879       record_failure("invalid non-klass dependency");
 880       return;
 881     }
 882   }
 883 
 884   // Klass dependencies must be checked when the system dictionary
 885   // changes.  If logging is enabled all violated dependences will be
 886   // recorded in the log.  In debug mode check dependencies even if
 887   // the system dictionary hasn't changed to verify that no invalid
 888   // dependencies were inserted.  Any violated dependences in this
 889   // case are dumped to the tty.
 890   bool counter_changed = system_dictionary_modification_counter_changed();
 891 
 892   bool verify_deps = trueInDebug;
 893   if (!counter_changed && !verify_deps)  return;
 894 
 895   int klass_violations = 0;
 896   for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
 897     if (!deps.is_klass_type())  continue;  // skip non-klass dependencies
 898     Klass* witness = deps.check_dependency();
 899     if (witness != NULL) {
 900       klass_violations++;
 901       if (!counter_changed) {
 902         // Dependence failed but counter didn't change.  Log a message
 903         // describing what failed and allow the assert at the end to
 904         // trigger.
 905         deps.print_dependency(witness);
 906       } else if (xtty == NULL) {
 907         // If we're not logging then a single violation is sufficient,
 908         // otherwise we want to log all the dependences which were
 909         // violated.
 910         break;
 911       }
 912     }
 913   }
 914 
 915   if (klass_violations != 0) {
 916 #ifdef ASSERT
 917     if (!counter_changed && !PrintCompilation) {
 918       // Print out the compile task that failed
 919       _task->print_line();
 920     }
 921 #endif
 922     assert(counter_changed, "failed dependencies, but counter didn't change");
 923     record_failure("concurrent class loading");
 924   }
 925 }
 926 
 927 // ------------------------------------------------------------------
 928 // ciEnv::register_method
 929 void ciEnv::register_method(ciMethod* target,
 930                             int entry_bci,
 931                             CodeOffsets* offsets,
 932                             int orig_pc_offset,
 933                             CodeBuffer* code_buffer,
 934                             int frame_words,
 935                             OopMapSet* oop_map_set,
 936                             ExceptionHandlerTable* handler_table,
 937                             ImplicitExceptionTable* inc_table,
 938                             AbstractCompiler* compiler,
 939                             int comp_level,
 940                             bool has_unsafe_access,
 941                             bool has_wide_vectors,
 942                             RTMState  rtm_state) {
 943   VM_ENTRY_MARK;
 944   nmethod* nm = NULL;
 945   {
 946     // To prevent compile queue updates.
 947     MutexLocker locker(MethodCompileQueue_lock, THREAD);
 948 
 949     // Prevent SystemDictionary::add_to_hierarchy from running
 950     // and invalidating our dependencies until we install this method.
 951     // No safepoints are allowed. Otherwise, class redefinition can occur in between.
 952     MutexLocker ml(Compile_lock);
 953     No_Safepoint_Verifier nsv;
 954 
 955     // Change in Jvmti state may invalidate compilation.
 956     if (!failing() &&
 957         ( (!jvmti_can_hotswap_or_post_breakpoint() &&
 958            JvmtiExport::can_hotswap_or_post_breakpoint()) ||
 959           (!jvmti_can_access_local_variables() &&
 960            JvmtiExport::can_access_local_variables()) ||
 961           (!jvmti_can_post_on_exceptions() &&
 962            JvmtiExport::can_post_on_exceptions()) )) {
 963       record_failure("Jvmti state change invalidated dependencies");
 964     }
 965 
 966     // Change in DTrace flags may invalidate compilation.
 967     if (!failing() &&
 968         ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
 969           (!dtrace_method_probes() && DTraceMethodProbes) ||
 970           (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
 971       record_failure("DTrace flags change invalidated dependencies");
 972     }
 973 
 974     if (!failing()) {
 975       if (log() != NULL) {
 976         // Log the dependencies which this compilation declares.
 977         dependencies()->log_all_dependencies();
 978       }
 979 
 980       // Encode the dependencies now, so we can check them right away.
 981       dependencies()->encode_content_bytes();
 982 
 983       // Check for {class loads, evolution, breakpoints, ...} during compilation
 984       validate_compile_task_dependencies(target);
 985     }
 986 
 987     methodHandle method(THREAD, target->get_Method());
 988 
 989 #if INCLUDE_RTM_OPT
 990     if (!failing() && (rtm_state != NoRTM) &&
 991         (method()->method_data() != NULL) &&
 992         (method()->method_data()->rtm_state() != rtm_state)) {
 993       // Preemptive decompile if rtm state was changed.
 994       record_failure("RTM state change invalidated rtm code");
 995     }
 996 #endif
 997 
 998     if (failing()) {
 999       // While not a true deoptimization, it is a preemptive decompile.
1000       MethodData* mdo = method()->method_data();
1001       if (mdo != NULL) {
1002         mdo->inc_decompile_count();
1003       }
1004 
1005       // All buffers in the CodeBuffer are allocated in the CodeCache.
1006       // If the code buffer is created on each compile attempt
1007       // as in C2, then it must be freed.
1008       code_buffer->free_blob();
1009       return;
1010     }
1011 
1012     assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1013     assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1014 
1015     nm =  nmethod::new_nmethod(method,
1016                                compile_id(),
1017                                entry_bci,
1018                                offsets,
1019                                orig_pc_offset,
1020                                debug_info(), dependencies(), code_buffer,
1021                                frame_words, oop_map_set,
1022                                handler_table, inc_table,
1023                                compiler, comp_level);
1024     // Free codeBlobs
1025     code_buffer->free_blob();
1026 
1027     if (nm != NULL) {
1028       nm->set_has_unsafe_access(has_unsafe_access);
1029       nm->set_has_wide_vectors(has_wide_vectors);
1030 #if INCLUDE_RTM_OPT
1031       nm->set_rtm_state(rtm_state);
1032 #endif
1033 
1034       // Record successful registration.
1035       // (Put nm into the task handle *before* publishing to the Java heap.)
1036       if (task() != NULL) {
1037         task()->set_code(nm);
1038       }
1039 
1040       if (entry_bci == InvocationEntryBci) {
1041         if (TieredCompilation) {
1042           // If there is an old version we're done with it
1043           nmethod* old = method->code();
1044           if (TraceMethodReplacement && old != NULL) {
1045             ResourceMark rm;
1046             char *method_name = method->name_and_sig_as_C_string();
1047             tty->print_cr("Replacing method %s", method_name);
1048           }
1049           if (old != NULL) {
1050             old->make_not_entrant();
1051           }
1052         }
1053         if (TraceNMethodInstalls) {
1054           ResourceMark rm;
1055           char *method_name = method->name_and_sig_as_C_string();
1056           ttyLocker ttyl;
1057           tty->print_cr("Installing method (%d) %s ",
1058                         comp_level,
1059                         method_name);
1060         }
1061         // Allow the code to be executed
1062         method->set_code(method, nm);
1063       } else {
1064         if (TraceNMethodInstalls) {
1065           ResourceMark rm;
1066           char *method_name = method->name_and_sig_as_C_string();
1067           ttyLocker ttyl;
1068           tty->print_cr("Installing osr method (%d) %s @ %d",
1069                         comp_level,
1070                         method_name,
1071                         entry_bci);
1072         }
1073         method->method_holder()->add_osr_nmethod(nm);
1074       }
1075     }
1076   }  // safepoints are allowed again
1077 
1078   if (nm != NULL) {
1079     // JVMTI -- compiled method notification (must be done outside lock)
1080     nm->post_compiled_method_load_event();
1081   } else {
1082     // The CodeCache is full. Print out warning and disable compilation.
1083     record_failure("code cache is full");
1084     CompileBroker::handle_full_code_cache();
1085   }
1086 }
1087 
1088 
1089 // ------------------------------------------------------------------
1090 // ciEnv::find_system_klass
1091 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1092   VM_ENTRY_MARK;
1093   return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false);
1094 }
1095 
1096 // ------------------------------------------------------------------
1097 // ciEnv::comp_level
1098 int ciEnv::comp_level() {
1099   if (task() == NULL)  return CompLevel_highest_tier;
1100   return task()->comp_level();
1101 }
1102 
1103 // ------------------------------------------------------------------
1104 // ciEnv::compile_id
1105 uint ciEnv::compile_id() {
1106   if (task() == NULL)  return 0;
1107   return task()->compile_id();
1108 }
1109 
1110 // ------------------------------------------------------------------
1111 // ciEnv::notice_inlined_method()
1112 void ciEnv::notice_inlined_method(ciMethod* method) {
1113   _num_inlined_bytecodes += method->code_size_for_inlining();
1114 }
1115 
1116 // ------------------------------------------------------------------
1117 // ciEnv::num_inlined_bytecodes()
1118 int ciEnv::num_inlined_bytecodes() const {
1119   return _num_inlined_bytecodes;
1120 }
1121 
1122 // ------------------------------------------------------------------
1123 // ciEnv::record_failure()
1124 void ciEnv::record_failure(const char* reason) {
1125   if (_failure_reason == NULL) {
1126     // Record the first failure reason.
1127     _failure_reason = reason;
1128   }
1129 }
1130 
1131 // ------------------------------------------------------------------
1132 // ciEnv::record_method_not_compilable()
1133 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1134   int new_compilable =
1135     all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1136 
1137   // Only note transitions to a worse state
1138   if (new_compilable > _compilable) {
1139     if (log() != NULL) {
1140       if (all_tiers) {
1141         log()->elem("method_not_compilable");
1142       } else {
1143         log()->elem("method_not_compilable_at_tier level='%d'",
1144                     current()->task()->comp_level());
1145       }
1146     }
1147     _compilable = new_compilable;
1148 
1149     // Reset failure reason; this one is more important.
1150     _failure_reason = NULL;
1151     record_failure(reason);
1152   }
1153 }
1154 
1155 // ------------------------------------------------------------------
1156 // ciEnv::record_out_of_memory_failure()
1157 void ciEnv::record_out_of_memory_failure() {
1158   // If memory is low, we stop compiling methods.
1159   record_method_not_compilable("out of memory");
1160 }
1161 
1162 ciInstance* ciEnv::unloaded_ciinstance() {
1163   GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1164 }
1165 
1166 // ------------------------------------------------------------------
1167 // ciEnv::dump_replay_data*
1168 
1169 // Don't change thread state and acquire any locks.
1170 // Safe to call from VM error reporter.
1171 
1172 void ciEnv::dump_compile_data(outputStream* out) {
1173   CompileTask* task = this->task();
1174   Method* method = task->method();
1175   int entry_bci = task->osr_bci();
1176   int comp_level = task->comp_level();
1177   out->print("compile %s %s %s %d %d",
1178                 method->klass_name()->as_quoted_ascii(),
1179                 method->name()->as_quoted_ascii(),
1180                 method->signature()->as_quoted_ascii(),
1181                 entry_bci, comp_level);
1182   if (compiler_data() != NULL) {
1183     if (is_c2_compile(comp_level)) { // C2 or Shark
1184 #ifdef COMPILER2
1185       // Dump C2 inlining data.
1186       ((Compile*)compiler_data())->dump_inline_data(out);
1187 #endif
1188     } else if (is_c1_compile(comp_level)) { // C1
1189 #ifdef COMPILER1
1190       // Dump C1 inlining data.
1191       ((Compilation*)compiler_data())->dump_inline_data(out);
1192 #endif
1193     }
1194   }
1195   out->cr();
1196 }
1197 
1198 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1199   ResourceMark rm;
1200 #if INCLUDE_JVMTI
1201   out->print_cr("JvmtiExport can_access_local_variables %d",     _jvmti_can_access_local_variables);
1202   out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1203   out->print_cr("JvmtiExport can_post_on_exceptions %d",         _jvmti_can_post_on_exceptions);
1204 #endif // INCLUDE_JVMTI
1205 
1206   GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1207   out->print_cr("# %d ciObject found", objects->length());
1208   for (int i = 0; i < objects->length(); i++) {
1209     objects->at(i)->dump_replay_data(out);
1210   }
1211   dump_compile_data(out);
1212   out->flush();
1213 }
1214 
1215 void ciEnv::dump_replay_data(outputStream* out) {
1216   GUARDED_VM_ENTRY(
1217     MutexLocker ml(Compile_lock);
1218     dump_replay_data_unsafe(out);
1219   )
1220 }
1221 
1222 void ciEnv::dump_replay_data(int compile_id) {
1223   static char buffer[O_BUFLEN];
1224   int ret = jio_snprintf(buffer, O_BUFLEN, "replay_pid%p_compid%d.log", os::current_process_id(), compile_id);
1225   if (ret > 0) {
1226     int fd = open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1227     if (fd != -1) {
1228       FILE* replay_data_file = os::open(fd, "w");
1229       if (replay_data_file != NULL) {
1230         fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1231         dump_replay_data(&replay_data_stream);
1232         tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1233       } else {
1234         tty->print_cr("# Can't open file to dump replay data.");
1235       }
1236     }
1237   }
1238 }
1239 
1240 void ciEnv::dump_inline_data(int compile_id) {
1241   static char buffer[O_BUFLEN];
1242   int ret = jio_snprintf(buffer, O_BUFLEN, "inline_pid%p_compid%d.log", os::current_process_id(), compile_id);
1243   if (ret > 0) {
1244     int fd = open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1245     if (fd != -1) {
1246       FILE* inline_data_file = os::open(fd, "w");
1247       if (inline_data_file != NULL) {
1248         fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1249         GUARDED_VM_ENTRY(
1250           MutexLocker ml(Compile_lock);
1251           dump_compile_data(&replay_data_stream);
1252         )
1253         replay_data_stream.flush();
1254         tty->print("# Compiler inline data is saved as: ");
1255         tty->print_cr("%s", buffer);
1256       } else {
1257         tty->print_cr("# Can't open file to dump inline data.");
1258       }
1259     }
1260   }
1261 }