1 /*
   2  * Copyright (c) 1999, 2019, 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 "jvm.h"
  27 #include "ci/ciConstant.hpp"
  28 #include "ci/ciEnv.hpp"
  29 #include "ci/ciField.hpp"
  30 #include "ci/ciInstance.hpp"
  31 #include "ci/ciInstanceKlass.hpp"
  32 #include "ci/ciMethod.hpp"
  33 #include "ci/ciNullObject.hpp"
  34 #include "ci/ciReplay.hpp"
  35 #include "ci/ciUtilities.inline.hpp"
  36 #include "classfile/symbolTable.hpp"
  37 #include "classfile/systemDictionary.hpp"
  38 #include "classfile/vmSymbols.hpp"
  39 #include "code/codeCache.hpp"
  40 #include "code/scopeDesc.hpp"
  41 #include "compiler/compileBroker.hpp"
  42 #include "compiler/compileLog.hpp"
  43 #include "compiler/disassembler.hpp"
  44 #include "gc/shared/collectedHeap.inline.hpp"
  45 #include "interpreter/linkResolver.hpp"
  46 #include "jfr/jfrEvents.hpp"
  47 #include "logging/log.hpp"
  48 #include "memory/allocation.inline.hpp"
  49 #include "memory/oopFactory.hpp"
  50 #include "memory/resourceArea.hpp"
  51 #include "memory/universe.hpp"
  52 #include "oops/constantPool.inline.hpp"
  53 #include "oops/cpCache.inline.hpp"
  54 #include "oops/method.inline.hpp"
  55 #include "oops/methodData.hpp"
  56 #include "oops/objArrayKlass.hpp"
  57 #include "oops/objArrayOop.inline.hpp"
  58 #include "oops/oop.inline.hpp"
  59 #include "prims/jvmtiExport.hpp"
  60 #include "runtime/handles.inline.hpp"
  61 #include "runtime/init.hpp"
  62 #include "runtime/reflection.hpp"
  63 #include "runtime/jniHandles.inline.hpp"
  64 #include "runtime/safepointVerifiers.hpp"
  65 #include "runtime/sharedRuntime.hpp"
  66 #include "runtime/thread.inline.hpp"
  67 #include "utilities/dtrace.hpp"
  68 #include "utilities/macros.hpp"
  69 #ifdef COMPILER1
  70 #include "c1/c1_Runtime1.hpp"
  71 #endif
  72 #ifdef COMPILER2
  73 #include "opto/runtime.hpp"
  74 #endif
  75 
  76 // ciEnv
  77 //
  78 // This class is the top level broker for requests from the compiler
  79 // to the VM.
  80 
  81 ciObject*              ciEnv::_null_object_instance;
  82 
  83 #define WK_KLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = NULL;
  84 WK_KLASSES_DO(WK_KLASS_DEFN)
  85 #undef WK_KLASS_DEFN
  86 
  87 ciSymbol*        ciEnv::_unloaded_cisymbol = NULL;
  88 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
  89 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
  90 
  91 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
  92 jobject ciEnv::_ArrayStoreException_handle = NULL;
  93 jobject ciEnv::_ClassCastException_handle = NULL;
  94 
  95 #ifndef PRODUCT
  96 static bool firstEnv = true;
  97 #endif /* PRODUCT */
  98 
  99 // ------------------------------------------------------------------
 100 // ciEnv::ciEnv
 101 ciEnv::ciEnv(CompileTask* task)
 102   : _ciEnv_arena(mtCompiler) {
 103   VM_ENTRY_MARK;
 104 
 105   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
 106   thread->set_env(this);
 107   assert(ciEnv::current() == this, "sanity");
 108 
 109   _oop_recorder = NULL;
 110   _debug_info = NULL;
 111   _dependencies = NULL;
 112   _failure_reason = NULL;
 113   _inc_decompile_count_on_failure = true;
 114   _compilable = MethodCompilable;
 115   _break_at_compile = false;
 116   _compiler_data = NULL;
 117 #ifndef PRODUCT
 118   assert(!firstEnv, "not initialized properly");
 119 #endif /* !PRODUCT */
 120 
 121   _num_inlined_bytecodes = 0;
 122   assert(task == NULL || thread->task() == task, "sanity");
 123   if (task != NULL) {
 124     task->mark_started(os::elapsed_counter());
 125   }
 126   _task = task;
 127   _log = NULL;
 128 
 129   // Temporary buffer for creating symbols and such.
 130   _name_buffer = NULL;
 131   _name_buffer_len = 0;
 132 
 133   _arena   = &_ciEnv_arena;
 134   _factory = new (_arena) ciObjectFactory(_arena, 128);
 135 
 136   // Preload commonly referenced system ciObjects.
 137 
 138   // During VM initialization, these instances have not yet been created.
 139   // Assertions ensure that these instances are not accessed before
 140   // their initialization.
 141 
 142   assert(Universe::is_fully_initialized(), "should be complete");
 143 
 144   oop o = Universe::null_ptr_exception_instance();
 145   assert(o != NULL, "should have been initialized");
 146   _NullPointerException_instance = get_object(o)->as_instance();
 147   o = Universe::arithmetic_exception_instance();
 148   assert(o != NULL, "should have been initialized");
 149   _ArithmeticException_instance = get_object(o)->as_instance();
 150 
 151   _ArrayIndexOutOfBoundsException_instance = NULL;
 152   _ArrayStoreException_instance = NULL;
 153   _ClassCastException_instance = NULL;
 154   _the_null_string = NULL;
 155   _the_min_jint_string = NULL;
 156 
 157   _jvmti_can_hotswap_or_post_breakpoint = false;
 158   _jvmti_can_access_local_variables = false;
 159   _jvmti_can_post_on_exceptions = false;
 160   _jvmti_can_pop_frame = false;
 161 }
 162 
 163 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
 164   ASSERT_IN_VM;
 165 
 166   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
 167   CompilerThread* current_thread = CompilerThread::current();
 168   assert(current_thread->env() == NULL, "must be");
 169   current_thread->set_env(this);
 170   assert(ciEnv::current() == this, "sanity");
 171 
 172   _oop_recorder = NULL;
 173   _debug_info = NULL;
 174   _dependencies = NULL;
 175   _failure_reason = NULL;
 176   _inc_decompile_count_on_failure = true;
 177   _compilable = MethodCompilable_never;
 178   _break_at_compile = false;
 179   _compiler_data = NULL;
 180 #ifndef PRODUCT
 181   assert(firstEnv, "must be first");
 182   firstEnv = false;
 183 #endif /* !PRODUCT */
 184 
 185   _num_inlined_bytecodes = 0;
 186   _task = NULL;
 187   _log = NULL;
 188 
 189   // Temporary buffer for creating symbols and such.
 190   _name_buffer = NULL;
 191   _name_buffer_len = 0;
 192 
 193   _arena   = arena;
 194   _factory = new (_arena) ciObjectFactory(_arena, 128);
 195 
 196   // Preload commonly referenced system ciObjects.
 197 
 198   // During VM initialization, these instances have not yet been created.
 199   // Assertions ensure that these instances are not accessed before
 200   // their initialization.
 201 
 202   assert(Universe::is_fully_initialized(), "must be");
 203 
 204   _NullPointerException_instance = NULL;
 205   _ArithmeticException_instance = NULL;
 206   _ArrayIndexOutOfBoundsException_instance = NULL;
 207   _ArrayStoreException_instance = NULL;
 208   _ClassCastException_instance = NULL;
 209   _the_null_string = NULL;
 210   _the_min_jint_string = NULL;
 211 
 212   _jvmti_can_hotswap_or_post_breakpoint = false;
 213   _jvmti_can_access_local_variables = false;
 214   _jvmti_can_post_on_exceptions = false;
 215   _jvmti_can_pop_frame = false;
 216 }
 217 
 218 ciEnv::~ciEnv() {
 219   GUARDED_VM_ENTRY(
 220       CompilerThread* current_thread = CompilerThread::current();
 221       _factory->remove_symbols();
 222       // Need safepoint to clear the env on the thread.  RedefineClasses might
 223       // be reading it.
 224       current_thread->set_env(NULL);
 225   )
 226 }
 227 
 228 // ------------------------------------------------------------------
 229 // Cache Jvmti state
 230 void ciEnv::cache_jvmti_state() {
 231   VM_ENTRY_MARK;
 232   // Get Jvmti capabilities under lock to get consistant values.
 233   MutexLocker mu(JvmtiThreadState_lock);
 234   _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
 235   _jvmti_can_access_local_variables     = JvmtiExport::can_access_local_variables();
 236   _jvmti_can_post_on_exceptions         = JvmtiExport::can_post_on_exceptions();
 237   _jvmti_can_pop_frame                  = JvmtiExport::can_pop_frame();
 238 }
 239 
 240 bool ciEnv::jvmti_state_changed() const {
 241   if (!_jvmti_can_access_local_variables &&
 242       JvmtiExport::can_access_local_variables()) {
 243     return true;
 244   }
 245   if (!_jvmti_can_hotswap_or_post_breakpoint &&
 246       JvmtiExport::can_hotswap_or_post_breakpoint()) {
 247     return true;
 248   }
 249   if (!_jvmti_can_post_on_exceptions &&
 250       JvmtiExport::can_post_on_exceptions()) {
 251     return true;
 252   }
 253   if (!_jvmti_can_pop_frame &&
 254       JvmtiExport::can_pop_frame()) {
 255     return true;
 256   }
 257   return false;
 258 }
 259 
 260 // ------------------------------------------------------------------
 261 // Cache DTrace flags
 262 void ciEnv::cache_dtrace_flags() {
 263   // Need lock?
 264   _dtrace_extended_probes = ExtendedDTraceProbes;
 265   if (_dtrace_extended_probes) {
 266     _dtrace_monitor_probes  = true;
 267     _dtrace_method_probes   = true;
 268     _dtrace_alloc_probes    = true;
 269   } else {
 270     _dtrace_monitor_probes  = DTraceMonitorProbes;
 271     _dtrace_method_probes   = DTraceMethodProbes;
 272     _dtrace_alloc_probes    = DTraceAllocProbes;
 273   }
 274 }
 275 
 276 // ------------------------------------------------------------------
 277 // helper for lazy exception creation
 278 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
 279   VM_ENTRY_MARK;
 280   if (handle == NULL) {
 281     // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
 282     Klass* k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
 283     jobject objh = NULL;
 284     if (!HAS_PENDING_EXCEPTION && k != NULL) {
 285       oop obj = InstanceKlass::cast(k)->allocate_instance(THREAD);
 286       if (!HAS_PENDING_EXCEPTION)
 287         objh = JNIHandles::make_global(Handle(THREAD, obj));
 288     }
 289     if (HAS_PENDING_EXCEPTION) {
 290       CLEAR_PENDING_EXCEPTION;
 291     } else {
 292       handle = objh;
 293     }
 294   }
 295   oop obj = JNIHandles::resolve(handle);
 296   return obj == NULL? NULL: get_object(obj)->as_instance();
 297 }
 298 
 299 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
 300   if (_ArrayIndexOutOfBoundsException_instance == NULL) {
 301     _ArrayIndexOutOfBoundsException_instance
 302           = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
 303           vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 304   }
 305   return _ArrayIndexOutOfBoundsException_instance;
 306 }
 307 ciInstance* ciEnv::ArrayStoreException_instance() {
 308   if (_ArrayStoreException_instance == NULL) {
 309     _ArrayStoreException_instance
 310           = get_or_create_exception(_ArrayStoreException_handle,
 311           vmSymbols::java_lang_ArrayStoreException());
 312   }
 313   return _ArrayStoreException_instance;
 314 }
 315 ciInstance* ciEnv::ClassCastException_instance() {
 316   if (_ClassCastException_instance == NULL) {
 317     _ClassCastException_instance
 318           = get_or_create_exception(_ClassCastException_handle,
 319           vmSymbols::java_lang_ClassCastException());
 320   }
 321   return _ClassCastException_instance;
 322 }
 323 
 324 ciInstance* ciEnv::the_null_string() {
 325   if (_the_null_string == NULL) {
 326     VM_ENTRY_MARK;
 327     _the_null_string = get_object(Universe::the_null_string())->as_instance();
 328   }
 329   return _the_null_string;
 330 }
 331 
 332 ciInstance* ciEnv::the_min_jint_string() {
 333   if (_the_min_jint_string == NULL) {
 334     VM_ENTRY_MARK;
 335     _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
 336   }
 337   return _the_min_jint_string;
 338 }
 339 
 340 // ------------------------------------------------------------------
 341 // ciEnv::get_method_from_handle
 342 ciMethod* ciEnv::get_method_from_handle(Method* method) {
 343   VM_ENTRY_MARK;
 344   return get_metadata(method)->as_method();
 345 }
 346 
 347 // ------------------------------------------------------------------
 348 // ciEnv::array_element_offset_in_bytes
 349 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
 350   VM_ENTRY_MARK;
 351   objArrayOop a = (objArrayOop)a_h->get_oop();
 352   assert(a->is_objArray(), "");
 353   int length = a->length();
 354   oop o = o_h->get_oop();
 355   for (int i = 0; i < length; i++) {
 356     if (a->obj_at(i) == o)  return i;
 357   }
 358   return -1;
 359 }
 360 
 361 
 362 // ------------------------------------------------------------------
 363 // ciEnv::check_klass_accessiblity
 364 //
 365 // Note: the logic of this method should mirror the logic of
 366 // ConstantPool::verify_constant_pool_resolve.
 367 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
 368                                       Klass* resolved_klass) {
 369   if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
 370     return true;
 371   }
 372   if (accessing_klass->is_obj_array_klass()) {
 373     accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
 374   }
 375   if (!accessing_klass->is_instance_klass()) {
 376     return true;
 377   }
 378 
 379   if (resolved_klass->is_objArray_klass()) {
 380     // Find the element klass, if this is an array.
 381     resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
 382   }
 383   if (resolved_klass->is_instance_klass()) {
 384     return (Reflection::verify_class_access(accessing_klass->get_Klass(),
 385                                             InstanceKlass::cast(resolved_klass),
 386                                             true) == Reflection::ACCESS_OK);
 387   }
 388   return true;
 389 }
 390 
 391 // ------------------------------------------------------------------
 392 // ciEnv::get_klass_by_name_impl
 393 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
 394                                        const constantPoolHandle& cpool,
 395                                        ciSymbol* name,
 396                                        bool require_local) {
 397   ASSERT_IN_VM;
 398   EXCEPTION_CONTEXT;
 399 
 400   // Now we need to check the SystemDictionary
 401   Symbol* sym = name->get_symbol();
 402   if (sym->char_at(0) == 'L' &&
 403     sym->char_at(sym->utf8_length()-1) == ';') {
 404     // This is a name from a signature.  Strip off the trimmings.
 405     // Call recursive to keep scope of strippedsym.
 406     TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
 407                                                         sym->utf8_length()-2);
 408     ciSymbol* strippedname = get_symbol(strippedsym);
 409     return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
 410   }
 411 
 412   // Check for prior unloaded klass.  The SystemDictionary's answers
 413   // can vary over time but the compiler needs consistency.
 414   ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
 415   if (unloaded_klass != NULL) {
 416     if (require_local)  return NULL;
 417     return unloaded_klass;
 418   }
 419 
 420   Handle loader(THREAD, (oop)NULL);
 421   Handle domain(THREAD, (oop)NULL);
 422   if (accessing_klass != NULL) {
 423     loader = Handle(THREAD, accessing_klass->loader());
 424     domain = Handle(THREAD, accessing_klass->protection_domain());
 425   }
 426 
 427   // setup up the proper type to return on OOM
 428   ciKlass* fail_type;
 429   if (sym->char_at(0) == '[') {
 430     fail_type = _unloaded_ciobjarrayklass;
 431   } else {
 432     fail_type = _unloaded_ciinstance_klass;
 433   }
 434   Klass* found_klass;
 435   {
 436     ttyUnlocker ttyul;  // release tty lock to avoid ordering problems
 437     MutexLocker ml(Compile_lock);
 438     Klass* kls;
 439     if (!require_local) {
 440       kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
 441                                                                        KILL_COMPILE_ON_FATAL_(fail_type));
 442     } else {
 443       kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
 444                                                            KILL_COMPILE_ON_FATAL_(fail_type));
 445     }
 446     found_klass = kls;
 447   }
 448 
 449   // If we fail to find an array klass, look again for its element type.
 450   // The element type may be available either locally or via constraints.
 451   // In either case, if we can find the element type in the system dictionary,
 452   // we must build an array type around it.  The CI requires array klasses
 453   // to be loaded if their element klasses are loaded, except when memory
 454   // is exhausted.
 455   if (sym->char_at(0) == '[' &&
 456       (sym->char_at(1) == '[' || sym->char_at(1) == 'L')) {
 457     // We have an unloaded array.
 458     // Build it on the fly if the element class exists.
 459     TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
 460                                                      sym->utf8_length()-1);
 461 
 462     // Get element ciKlass recursively.
 463     ciKlass* elem_klass =
 464       get_klass_by_name_impl(accessing_klass,
 465                              cpool,
 466                              get_symbol(elem_sym),
 467                              require_local);
 468     if (elem_klass != NULL && elem_klass->is_loaded()) {
 469       // Now make an array for it
 470       return ciObjArrayKlass::make_impl(elem_klass);
 471     }
 472   }
 473 
 474   if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) {
 475     // Look inside the constant pool for pre-resolved class entries.
 476     for (int i = cpool->length() - 1; i >= 1; i--) {
 477       if (cpool->tag_at(i).is_klass()) {
 478         Klass* kls = cpool->resolved_klass_at(i);
 479         if (kls->name() == sym) {
 480           found_klass = kls;
 481           break;
 482         }
 483       }
 484     }
 485   }
 486 
 487   if (found_klass != NULL) {
 488     // Found it.  Build a CI handle.
 489     return get_klass(found_klass);
 490   }
 491 
 492   if (require_local)  return NULL;
 493 
 494   // Not yet loaded into the VM, or not governed by loader constraints.
 495   // Make a CI representative for it.
 496   return get_unloaded_klass(accessing_klass, name);
 497 }
 498 
 499 // ------------------------------------------------------------------
 500 // ciEnv::get_klass_by_name
 501 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
 502                                   ciSymbol* klass_name,
 503                                   bool require_local) {
 504   GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
 505                                                  constantPoolHandle(),
 506                                                  klass_name,
 507                                                  require_local);)
 508 }
 509 
 510 // ------------------------------------------------------------------
 511 // ciEnv::get_klass_by_index_impl
 512 //
 513 // Implementation of get_klass_by_index.
 514 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
 515                                         int index,
 516                                         bool& is_accessible,
 517                                         ciInstanceKlass* accessor) {
 518   EXCEPTION_CONTEXT;
 519   Klass* klass = NULL;
 520   Symbol* klass_name = NULL;
 521 
 522   if (cpool->tag_at(index).is_symbol()) {
 523     klass_name = cpool->symbol_at(index);
 524   } else {
 525     // Check if it's resolved if it's not a symbol constant pool entry.
 526     klass =  ConstantPool::klass_at_if_loaded(cpool, index);
 527     // Try to look it up by name.
 528     if (klass == NULL) {
 529       klass_name = cpool->klass_name_at(index);
 530     }
 531   }
 532 
 533   if (klass == NULL) {
 534     // Not found in constant pool.  Use the name to do the lookup.
 535     ciKlass* k = get_klass_by_name_impl(accessor,
 536                                         cpool,
 537                                         get_symbol(klass_name),
 538                                         false);
 539     // Calculate accessibility the hard way.
 540     if (!k->is_loaded()) {
 541       is_accessible = false;
 542     } else if (!oopDesc::equals(k->loader(), accessor->loader()) &&
 543                get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
 544       // Loaded only remotely.  Not linked yet.
 545       is_accessible = false;
 546     } else {
 547       // Linked locally, and we must also check public/private, etc.
 548       is_accessible = check_klass_accessibility(accessor, k->get_Klass());
 549     }
 550     return k;
 551   }
 552 
 553   // Check for prior unloaded klass.  The SystemDictionary's answers
 554   // can vary over time but the compiler needs consistency.
 555   ciSymbol* name = get_symbol(klass->name());
 556   ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
 557   if (unloaded_klass != NULL) {
 558     is_accessible = false;
 559     return unloaded_klass;
 560   }
 561 
 562   // It is known to be accessible, since it was found in the constant pool.
 563   is_accessible = true;
 564   return get_klass(klass);
 565 }
 566 
 567 // ------------------------------------------------------------------
 568 // ciEnv::get_klass_by_index
 569 //
 570 // Get a klass from the constant pool.
 571 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
 572                                    int index,
 573                                    bool& is_accessible,
 574                                    ciInstanceKlass* accessor) {
 575   GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
 576 }
 577 
 578 // ------------------------------------------------------------------
 579 // ciEnv::get_constant_by_index_impl
 580 //
 581 // Implementation of get_constant_by_index().
 582 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
 583                                              int pool_index, int cache_index,
 584                                              ciInstanceKlass* accessor) {
 585   bool ignore_will_link;
 586   EXCEPTION_CONTEXT;
 587   int index = pool_index;
 588   if (cache_index >= 0) {
 589     assert(index < 0, "only one kind of index at a time");
 590     index = cpool->object_to_cp_index(cache_index);
 591     oop obj = cpool->resolved_references()->obj_at(cache_index);
 592     if (obj != NULL) {
 593       if (oopDesc::equals(obj, Universe::the_null_sentinel())) {
 594         return ciConstant(T_OBJECT, get_object(NULL));
 595       }
 596       BasicType bt = T_OBJECT;
 597       if (cpool->tag_at(index).is_dynamic_constant())
 598         bt = FieldType::basic_type(cpool->uncached_signature_ref_at(index));
 599       if (is_reference_type(bt)) {
 600       } else {
 601         // we have to unbox the primitive value
 602         if (!is_java_primitive(bt))  return ciConstant();
 603         jvalue value;
 604         BasicType bt2 = java_lang_boxing_object::get_value(obj, &value);
 605         assert(bt2 == bt, "");
 606         switch (bt2) {
 607         case T_DOUBLE:  return ciConstant(value.d);
 608         case T_FLOAT:   return ciConstant(value.f);
 609         case T_LONG:    return ciConstant(value.j);
 610         case T_INT:     return ciConstant(bt2, value.i);
 611         case T_SHORT:   return ciConstant(bt2, value.s);
 612         case T_BYTE:    return ciConstant(bt2, value.b);
 613         case T_CHAR:    return ciConstant(bt2, value.c);
 614         case T_BOOLEAN: return ciConstant(bt2, value.z);
 615         default:  return ciConstant();
 616         }
 617       }
 618       ciObject* ciobj = get_object(obj);
 619       if (ciobj->is_array()) {
 620         return ciConstant(T_ARRAY, ciobj);
 621       } else {
 622         assert(ciobj->is_instance(), "should be an instance");
 623         return ciConstant(T_OBJECT, ciobj);
 624       }
 625     }
 626   }
 627   constantTag tag = cpool->tag_at(index);
 628   if (tag.is_int()) {
 629     return ciConstant(T_INT, (jint)cpool->int_at(index));
 630   } else if (tag.is_long()) {
 631     return ciConstant((jlong)cpool->long_at(index));
 632   } else if (tag.is_float()) {
 633     return ciConstant((jfloat)cpool->float_at(index));
 634   } else if (tag.is_double()) {
 635     return ciConstant((jdouble)cpool->double_at(index));
 636   } else if (tag.is_string()) {
 637     oop string = NULL;
 638     assert(cache_index >= 0, "should have a cache index");
 639     if (cpool->is_pseudo_string_at(index)) {
 640       string = cpool->pseudo_string_at(index, cache_index);
 641     } else {
 642       string = cpool->string_at(index, cache_index, THREAD);
 643       if (HAS_PENDING_EXCEPTION) {
 644         CLEAR_PENDING_EXCEPTION;
 645         record_out_of_memory_failure();
 646         return ciConstant();
 647       }
 648     }
 649     ciObject* constant = get_object(string);
 650     if (constant->is_array()) {
 651       return ciConstant(T_ARRAY, constant);
 652     } else {
 653       assert (constant->is_instance(), "must be an instance, or not? ");
 654       return ciConstant(T_OBJECT, constant);
 655     }
 656   } else if (tag.is_klass() || tag.is_unresolved_klass()) {
 657     // 4881222: allow ldc to take a class type
 658     ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
 659     if (HAS_PENDING_EXCEPTION) {
 660       CLEAR_PENDING_EXCEPTION;
 661       record_out_of_memory_failure();
 662       return ciConstant();
 663     }
 664     assert (klass->is_instance_klass() || klass->is_array_klass(),
 665             "must be an instance or array klass ");
 666     return ciConstant(T_OBJECT, klass->java_mirror());
 667   } else if (tag.is_method_type()) {
 668     // must execute Java code to link this CP entry into cache[i].f1
 669     ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
 670     ciObject* ciobj = get_unloaded_method_type_constant(signature);
 671     return ciConstant(T_OBJECT, ciobj);
 672   } else if (tag.is_method_handle()) {
 673     // must execute Java code to link this CP entry into cache[i].f1
 674     int ref_kind        = cpool->method_handle_ref_kind_at(index);
 675     int callee_index    = cpool->method_handle_klass_index_at(index);
 676     ciKlass* callee     = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
 677     ciSymbol* name      = get_symbol(cpool->method_handle_name_ref_at(index));
 678     ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
 679     ciObject* ciobj     = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
 680     return ciConstant(T_OBJECT, ciobj);
 681   } else if (tag.is_dynamic_constant()) {
 682     return ciConstant();
 683   } else {
 684     ShouldNotReachHere();
 685     return ciConstant();
 686   }
 687 }
 688 
 689 // ------------------------------------------------------------------
 690 // ciEnv::get_constant_by_index
 691 //
 692 // Pull a constant out of the constant pool.  How appropriate.
 693 //
 694 // Implementation note: this query is currently in no way cached.
 695 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
 696                                         int pool_index, int cache_index,
 697                                         ciInstanceKlass* accessor) {
 698   GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
 699 }
 700 
 701 // ------------------------------------------------------------------
 702 // ciEnv::get_field_by_index_impl
 703 //
 704 // Implementation of get_field_by_index.
 705 //
 706 // Implementation note: the results of field lookups are cached
 707 // in the accessor klass.
 708 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
 709                                         int index) {
 710   ciConstantPoolCache* cache = accessor->field_cache();
 711   if (cache == NULL) {
 712     ciField* field = new (arena()) ciField(accessor, index);
 713     return field;
 714   } else {
 715     ciField* field = (ciField*)cache->get(index);
 716     if (field == NULL) {
 717       field = new (arena()) ciField(accessor, index);
 718       cache->insert(index, field);
 719     }
 720     return field;
 721   }
 722 }
 723 
 724 // ------------------------------------------------------------------
 725 // ciEnv::get_field_by_index
 726 //
 727 // Get a field by index from a klass's constant pool.
 728 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
 729                                    int index) {
 730   GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
 731 }
 732 
 733 // ------------------------------------------------------------------
 734 // ciEnv::lookup_method
 735 //
 736 // Perform an appropriate method lookup based on accessor, holder,
 737 // name, signature, and bytecode.
 738 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
 739                              ciKlass*         holder,
 740                              Symbol*          name,
 741                              Symbol*          sig,
 742                              Bytecodes::Code  bc,
 743                              constantTag      tag) {
 744   // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
 745   assert(check_klass_accessibility(accessor, holder->get_Klass()), "holder not accessible");
 746 
 747   InstanceKlass* accessor_klass = accessor->get_instanceKlass();
 748   Klass* holder_klass = holder->get_Klass();
 749   methodHandle dest_method;
 750   LinkInfo link_info(holder_klass, name, sig, accessor_klass, LinkInfo::needs_access_check, tag);
 751   switch (bc) {
 752   case Bytecodes::_invokestatic:
 753     dest_method =
 754       LinkResolver::resolve_static_call_or_null(link_info);
 755     break;
 756   case Bytecodes::_invokespecial:
 757     dest_method =
 758       LinkResolver::resolve_special_call_or_null(link_info);
 759     break;
 760   case Bytecodes::_invokeinterface:
 761     dest_method =
 762       LinkResolver::linktime_resolve_interface_method_or_null(link_info);
 763     break;
 764   case Bytecodes::_invokevirtual:
 765     dest_method =
 766       LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
 767     break;
 768   default: ShouldNotReachHere();
 769   }
 770 
 771   return dest_method();
 772 }
 773 
 774 
 775 // ------------------------------------------------------------------
 776 // ciEnv::get_method_by_index_impl
 777 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
 778                                           int index, Bytecodes::Code bc,
 779                                           ciInstanceKlass* accessor) {
 780   if (bc == Bytecodes::_invokedynamic) {
 781     ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
 782     bool is_resolved = !cpce->is_f1_null();
 783     // FIXME: code generation could allow for null (unlinked) call site
 784     // The call site could be made patchable as follows:
 785     // Load the appendix argument from the constant pool.
 786     // Test the appendix argument and jump to a known deopt routine if it is null.
 787     // Jump through a patchable call site, which is initially a deopt routine.
 788     // Patch the call site to the nmethod entry point of the static compiled lambda form.
 789     // As with other two-component call sites, both values must be independently verified.
 790 
 791     if (is_resolved) {
 792       // Get the invoker Method* from the constant pool.
 793       // (The appendix argument, if any, will be noted in the method's signature.)
 794       Method* adapter = cpce->f1_as_method();
 795       return get_method(adapter);
 796     }
 797 
 798     // Fake a method that is equivalent to a declared method.
 799     ciInstanceKlass* holder    = get_instance_klass(SystemDictionary::MethodHandle_klass());
 800     ciSymbol*        name      = ciSymbol::invokeBasic_name();
 801     ciSymbol*        signature = get_symbol(cpool->signature_ref_at(index));
 802     return get_unloaded_method(holder, name, signature, accessor);
 803   } else {
 804     const int holder_index = cpool->klass_ref_index_at(index);
 805     bool holder_is_accessible;
 806     ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
 807 
 808     // Get the method's name and signature.
 809     Symbol* name_sym = cpool->name_ref_at(index);
 810     Symbol* sig_sym  = cpool->signature_ref_at(index);
 811 
 812     if (cpool->has_preresolution()
 813         || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
 814             MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
 815       // Short-circuit lookups for JSR 292-related call sites.
 816       // That is, do not rely only on name-based lookups, because they may fail
 817       // if the names are not resolvable in the boot class loader (7056328).
 818       switch (bc) {
 819       case Bytecodes::_invokevirtual:
 820       case Bytecodes::_invokeinterface:
 821       case Bytecodes::_invokespecial:
 822       case Bytecodes::_invokestatic:
 823         {
 824           Method* m = ConstantPool::method_at_if_loaded(cpool, index);
 825           if (m != NULL) {
 826             return get_method(m);
 827           }
 828         }
 829         break;
 830       default:
 831         break;
 832       }
 833     }
 834 
 835     if (holder_is_accessible) {  // Our declared holder is loaded.
 836       constantTag tag = cpool->tag_ref_at(index);
 837       assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
 838       Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
 839       if (m != NULL &&
 840           (bc == Bytecodes::_invokestatic
 841            ?  m->method_holder()->is_not_initialized()
 842            : !m->method_holder()->is_loaded())) {
 843         m = NULL;
 844       }
 845 #ifdef ASSERT
 846       if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
 847         m = NULL;
 848       }
 849 #endif
 850       if (m != NULL) {
 851         // We found the method.
 852         return get_method(m);
 853       }
 854     }
 855 
 856     // Either the declared holder was not loaded, or the method could
 857     // not be found.  Create a dummy ciMethod to represent the failed
 858     // lookup.
 859     ciSymbol* name      = get_symbol(name_sym);
 860     ciSymbol* signature = get_symbol(sig_sym);
 861     return get_unloaded_method(holder, name, signature, accessor);
 862   }
 863 }
 864 
 865 
 866 // ------------------------------------------------------------------
 867 // ciEnv::get_instance_klass_for_declared_method_holder
 868 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
 869   // For the case of <array>.clone(), the method holder can be a ciArrayKlass
 870   // instead of a ciInstanceKlass.  For that case simply pretend that the
 871   // declared holder is Object.clone since that's where the call will bottom out.
 872   // A more correct fix would trickle out through many interfaces in CI,
 873   // requiring ciInstanceKlass* to become ciKlass* and many more places would
 874   // require checks to make sure the expected type was found.  Given that this
 875   // only occurs for clone() the more extensive fix seems like overkill so
 876   // instead we simply smear the array type into Object.
 877   guarantee(method_holder != NULL, "no method holder");
 878   if (method_holder->is_instance_klass()) {
 879     return method_holder->as_instance_klass();
 880   } else if (method_holder->is_array_klass()) {
 881     return current()->Object_klass();
 882   } else {
 883     ShouldNotReachHere();
 884   }
 885   return NULL;
 886 }
 887 
 888 
 889 // ------------------------------------------------------------------
 890 // ciEnv::get_method_by_index
 891 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
 892                                      int index, Bytecodes::Code bc,
 893                                      ciInstanceKlass* accessor) {
 894   GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
 895 }
 896 
 897 
 898 // ------------------------------------------------------------------
 899 // ciEnv::name_buffer
 900 char *ciEnv::name_buffer(int req_len) {
 901   if (_name_buffer_len < req_len) {
 902     if (_name_buffer == NULL) {
 903       _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
 904       _name_buffer_len = req_len;
 905     } else {
 906       _name_buffer =
 907         (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
 908       _name_buffer_len = req_len;
 909     }
 910   }
 911   return _name_buffer;
 912 }
 913 
 914 // ------------------------------------------------------------------
 915 // ciEnv::is_in_vm
 916 bool ciEnv::is_in_vm() {
 917   return JavaThread::current()->thread_state() == _thread_in_vm;
 918 }
 919 
 920 // ------------------------------------------------------------------
 921 // ciEnv::validate_compile_task_dependencies
 922 //
 923 // Check for changes during compilation (e.g. class loads, evolution,
 924 // breakpoints, call site invalidation).
 925 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
 926   if (failing())  return;  // no need for further checks
 927 
 928   Dependencies::DepType result = dependencies()->validate_dependencies(_task);
 929   if (result != Dependencies::end_marker) {
 930     if (result == Dependencies::call_site_target_value) {
 931       _inc_decompile_count_on_failure = false;
 932       record_failure("call site target change");
 933     } else if (Dependencies::is_klass_type(result)) {
 934       record_failure("concurrent class loading");
 935     } else {
 936       record_failure("invalid non-klass dependency");
 937     }
 938   }
 939 }
 940 
 941 // ------------------------------------------------------------------
 942 // ciEnv::register_method
 943 void ciEnv::register_method(ciMethod* target,
 944                             int entry_bci,
 945                             CodeOffsets* offsets,
 946                             int orig_pc_offset,
 947                             CodeBuffer* code_buffer,
 948                             int frame_words,
 949                             OopMapSet* oop_map_set,
 950                             ExceptionHandlerTable* handler_table,
 951                             ImplicitExceptionTable* inc_table,
 952                             AbstractCompiler* compiler,
 953                             bool has_unsafe_access,
 954                             bool has_wide_vectors,
 955                             bool has_monitors,
 956                             int immediate_oops_patched,
 957                             RTMState  rtm_state) {
 958   VM_ENTRY_MARK;
 959   nmethod* nm = NULL;
 960   {
 961     // To prevent compile queue updates.
 962     MutexLocker locker(MethodCompileQueue_lock, THREAD);
 963 
 964     // Prevent SystemDictionary::add_to_hierarchy from running
 965     // and invalidating our dependencies until we install this method.
 966     // No safepoints are allowed. Otherwise, class redefinition can occur in between.
 967     MutexLocker ml(Compile_lock);
 968     NoSafepointVerifier nsv;
 969 
 970     // Change in Jvmti state may invalidate compilation.
 971     if (!failing() && jvmti_state_changed()) {
 972       record_failure("Jvmti state change invalidated dependencies");
 973     }
 974 
 975     // Change in DTrace flags may invalidate compilation.
 976     if (!failing() &&
 977         ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
 978           (!dtrace_method_probes() && DTraceMethodProbes) ||
 979           (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
 980       record_failure("DTrace flags change invalidated dependencies");
 981     }
 982 
 983     if (!failing() && target->needs_clinit_barrier() &&
 984         target->holder()->is_in_error_state()) {
 985       record_failure("method holder is in error state");
 986     }
 987 
 988     if (!failing()) {
 989       if (log() != NULL) {
 990         // Log the dependencies which this compilation declares.
 991         dependencies()->log_all_dependencies();
 992       }
 993 
 994       // Encode the dependencies now, so we can check them right away.
 995       dependencies()->encode_content_bytes();
 996 
 997       // Check for {class loads, evolution, breakpoints, ...} during compilation
 998       validate_compile_task_dependencies(target);
 999     }
1000 
1001     methodHandle method(THREAD, target->get_Method());
1002 
1003 #if INCLUDE_RTM_OPT
1004     if (!failing() && (rtm_state != NoRTM) &&
1005         (method()->method_data() != NULL) &&
1006         (method()->method_data()->rtm_state() != rtm_state)) {
1007       // Preemptive decompile if rtm state was changed.
1008       record_failure("RTM state change invalidated rtm code");
1009     }
1010 #endif
1011 
1012     if (failing()) {
1013       // While not a true deoptimization, it is a preemptive decompile.
1014       MethodData* mdo = method()->method_data();
1015       if (mdo != NULL && _inc_decompile_count_on_failure) {
1016         mdo->inc_decompile_count();
1017       }
1018 
1019       // All buffers in the CodeBuffer are allocated in the CodeCache.
1020       // If the code buffer is created on each compile attempt
1021       // as in C2, then it must be freed.
1022       code_buffer->free_blob();
1023       return;
1024     }
1025 
1026     assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1027     assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1028 
1029     nm =  nmethod::new_nmethod(method,
1030                                compile_id(),
1031                                entry_bci,
1032                                offsets,
1033                                orig_pc_offset,
1034                                debug_info(), dependencies(), code_buffer,
1035                                frame_words, oop_map_set,
1036                                handler_table, inc_table,
1037                                compiler, task()->comp_level());
1038 
1039     // Free codeBlobs
1040     code_buffer->free_blob();
1041 
1042     if (nm != NULL) {
1043       nm->set_has_unsafe_access(has_unsafe_access);
1044       nm->set_has_wide_vectors(has_wide_vectors);
1045       nm->set_has_monitors(has_monitors);
1046       nm->set_immediate_oops_patched(immediate_oops_patched);
1047       assert (!method->is_synchronized() || nm->has_monitors(), "");
1048 #if INCLUDE_RTM_OPT
1049       nm->set_rtm_state(rtm_state);
1050 #endif
1051 
1052       // Record successful registration.
1053       // (Put nm into the task handle *before* publishing to the Java heap.)
1054       if (task() != NULL) {
1055         task()->set_code(nm);
1056       }
1057 
1058       if (entry_bci == InvocationEntryBci) {
1059         if (TieredCompilation) {
1060           // If there is an old version we're done with it
1061           CompiledMethod* old = method->code();
1062           if (TraceMethodReplacement && old != NULL) {
1063             ResourceMark rm;
1064             char *method_name = method->name_and_sig_as_C_string();
1065             tty->print_cr("Replacing method %s", method_name);
1066           }
1067           if (old != NULL) {
1068             old->make_not_used();
1069           }
1070         }
1071 
1072         LogTarget(Info, nmethod, install) lt;
1073         if (lt.is_enabled()) {
1074           ResourceMark rm;
1075           char *method_name = method->name_and_sig_as_C_string();
1076           lt.print("Installing method (%d) %s ",
1077                     task()->comp_level(), method_name);
1078         }
1079         // Allow the code to be executed
1080         method->set_code(method, nm);
1081       } else {
1082         LogTarget(Info, nmethod, install) lt;
1083         if (lt.is_enabled()) {
1084           ResourceMark rm;
1085           char *method_name = method->name_and_sig_as_C_string();
1086           lt.print("Installing osr method (%d) %s @ %d",
1087                     task()->comp_level(), method_name, entry_bci);
1088         }
1089         method->method_holder()->add_osr_nmethod(nm);
1090       }
1091       nm->make_in_use();
1092     }
1093   }  // safepoints are allowed again
1094 
1095   if (nm != NULL) {
1096     // JVMTI -- compiled method notification (must be done outside lock)
1097     nm->post_compiled_method_load_event();
1098   } else {
1099     // The CodeCache is full.
1100     record_failure("code cache is full");
1101   }
1102 }
1103 
1104 
1105 // ------------------------------------------------------------------
1106 // ciEnv::find_system_klass
1107 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1108   VM_ENTRY_MARK;
1109   return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false);
1110 }
1111 
1112 // ------------------------------------------------------------------
1113 // ciEnv::comp_level
1114 int ciEnv::comp_level() {
1115   if (task() == NULL)  return CompLevel_highest_tier;
1116   return task()->comp_level();
1117 }
1118 
1119 // ------------------------------------------------------------------
1120 // ciEnv::compile_id
1121 uint ciEnv::compile_id() {
1122   if (task() == NULL)  return 0;
1123   return task()->compile_id();
1124 }
1125 
1126 // ------------------------------------------------------------------
1127 // ciEnv::notice_inlined_method()
1128 void ciEnv::notice_inlined_method(ciMethod* method) {
1129   _num_inlined_bytecodes += method->code_size_for_inlining();
1130 }
1131 
1132 // ------------------------------------------------------------------
1133 // ciEnv::num_inlined_bytecodes()
1134 int ciEnv::num_inlined_bytecodes() const {
1135   return _num_inlined_bytecodes;
1136 }
1137 
1138 // ------------------------------------------------------------------
1139 // ciEnv::record_failure()
1140 void ciEnv::record_failure(const char* reason) {
1141   if (_failure_reason == NULL) {
1142     // Record the first failure reason.
1143     _failure_reason = reason;
1144   }
1145 }
1146 
1147 void ciEnv::report_failure(const char* reason) {
1148   EventCompilationFailure event;
1149   if (event.should_commit()) {
1150     event.set_compileId(compile_id());
1151     event.set_failureMessage(reason);
1152     event.commit();
1153   }
1154 }
1155 
1156 // ------------------------------------------------------------------
1157 // ciEnv::record_method_not_compilable()
1158 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1159   int new_compilable =
1160     all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1161 
1162   // Only note transitions to a worse state
1163   if (new_compilable > _compilable) {
1164     if (log() != NULL) {
1165       if (all_tiers) {
1166         log()->elem("method_not_compilable");
1167       } else {
1168         log()->elem("method_not_compilable_at_tier level='%d'",
1169                     current()->task()->comp_level());
1170       }
1171     }
1172     _compilable = new_compilable;
1173 
1174     // Reset failure reason; this one is more important.
1175     _failure_reason = NULL;
1176     record_failure(reason);
1177   }
1178 }
1179 
1180 // ------------------------------------------------------------------
1181 // ciEnv::record_out_of_memory_failure()
1182 void ciEnv::record_out_of_memory_failure() {
1183   // If memory is low, we stop compiling methods.
1184   record_method_not_compilable("out of memory");
1185 }
1186 
1187 ciInstance* ciEnv::unloaded_ciinstance() {
1188   GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1189 }
1190 
1191 // ------------------------------------------------------------------
1192 // ciEnv::dump_replay_data*
1193 
1194 // Don't change thread state and acquire any locks.
1195 // Safe to call from VM error reporter.
1196 
1197 void ciEnv::dump_compile_data(outputStream* out) {
1198   CompileTask* task = this->task();
1199   if (task) {
1200     Method* method = task->method();
1201     int entry_bci = task->osr_bci();
1202     int comp_level = task->comp_level();
1203     out->print("compile %s %s %s %d %d",
1204                method->klass_name()->as_quoted_ascii(),
1205                method->name()->as_quoted_ascii(),
1206                method->signature()->as_quoted_ascii(),
1207                entry_bci, comp_level);
1208     if (compiler_data() != NULL) {
1209       if (is_c2_compile(comp_level)) {
1210 #ifdef COMPILER2
1211         // Dump C2 inlining data.
1212         ((Compile*)compiler_data())->dump_inline_data(out);
1213 #endif
1214       } else if (is_c1_compile(comp_level)) {
1215 #ifdef COMPILER1
1216         // Dump C1 inlining data.
1217         ((Compilation*)compiler_data())->dump_inline_data(out);
1218 #endif
1219       }
1220     }
1221     out->cr();
1222   }
1223 }
1224 
1225 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1226   ResourceMark rm;
1227 #if INCLUDE_JVMTI
1228   out->print_cr("JvmtiExport can_access_local_variables %d",     _jvmti_can_access_local_variables);
1229   out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1230   out->print_cr("JvmtiExport can_post_on_exceptions %d",         _jvmti_can_post_on_exceptions);
1231 #endif // INCLUDE_JVMTI
1232 
1233   GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1234   out->print_cr("# %d ciObject found", objects->length());
1235   for (int i = 0; i < objects->length(); i++) {
1236     objects->at(i)->dump_replay_data(out);
1237   }
1238   dump_compile_data(out);
1239   out->flush();
1240 }
1241 
1242 void ciEnv::dump_replay_data(outputStream* out) {
1243   GUARDED_VM_ENTRY(
1244     MutexLocker ml(Compile_lock);
1245     dump_replay_data_unsafe(out);
1246   )
1247 }
1248 
1249 void ciEnv::dump_replay_data(int compile_id) {
1250   static char buffer[O_BUFLEN];
1251   int ret = jio_snprintf(buffer, O_BUFLEN, "replay_pid%p_compid%d.log", os::current_process_id(), compile_id);
1252   if (ret > 0) {
1253     int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1254     if (fd != -1) {
1255       FILE* replay_data_file = os::open(fd, "w");
1256       if (replay_data_file != NULL) {
1257         fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1258         dump_replay_data(&replay_data_stream);
1259         tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1260       } else {
1261         tty->print_cr("# Can't open file to dump replay data.");
1262       }
1263     }
1264   }
1265 }
1266 
1267 void ciEnv::dump_inline_data(int compile_id) {
1268   static char buffer[O_BUFLEN];
1269   int ret = jio_snprintf(buffer, O_BUFLEN, "inline_pid%p_compid%d.log", os::current_process_id(), compile_id);
1270   if (ret > 0) {
1271     int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1272     if (fd != -1) {
1273       FILE* inline_data_file = os::open(fd, "w");
1274       if (inline_data_file != NULL) {
1275         fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1276         GUARDED_VM_ENTRY(
1277           MutexLocker ml(Compile_lock);
1278           dump_compile_data(&replay_data_stream);
1279         )
1280         replay_data_stream.flush();
1281         tty->print("# Compiler inline data is saved as: ");
1282         tty->print_cr("%s", buffer);
1283       } else {
1284         tty->print_cr("# Can't open file to dump inline data.");
1285       }
1286     }
1287   }
1288 }