1 /*
   2  * Copyright (c) 1999, 2023, 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/ciInlineKlass.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/ciSymbols.hpp"
  36 #include "ci/ciUtilities.inline.hpp"
  37 #include "classfile/javaClasses.hpp"
  38 #include "classfile/javaClasses.inline.hpp"
  39 #include "classfile/systemDictionary.hpp"
  40 #include "classfile/vmClasses.hpp"
  41 #include "classfile/vmSymbols.hpp"
  42 #include "code/codeCache.hpp"
  43 #include "code/scopeDesc.hpp"
  44 #include "compiler/compilationLog.hpp"
  45 #include "compiler/compilationPolicy.hpp"
  46 #include "compiler/compileBroker.hpp"
  47 #include "compiler/compilerEvent.hpp"
  48 #include "compiler/compileLog.hpp"
  49 #include "compiler/compileTask.hpp"
  50 #include "compiler/disassembler.hpp"
  51 #include "gc/shared/collectedHeap.inline.hpp"
  52 #include "interpreter/bytecodeStream.hpp"
  53 #include "interpreter/linkResolver.hpp"
  54 #include "jfr/jfrEvents.hpp"
  55 #include "jvm.h"
  56 #include "logging/log.hpp"
  57 #include "memory/allocation.inline.hpp"
  58 #include "memory/oopFactory.hpp"
  59 #include "memory/resourceArea.hpp"
  60 #include "memory/universe.hpp"
  61 #include "oops/constantPool.inline.hpp"
  62 #include "oops/cpCache.inline.hpp"
  63 #include "oops/method.inline.hpp"
  64 #include "oops/methodData.hpp"
  65 #include "oops/objArrayKlass.hpp"
  66 #include "oops/objArrayOop.inline.hpp"
  67 #include "oops/oop.inline.hpp"
  68 #include "oops/symbolHandle.hpp"
  69 #include "prims/jvmtiExport.hpp"
  70 #include "prims/methodHandles.hpp"
  71 #include "runtime/fieldDescriptor.inline.hpp"
  72 #include "runtime/handles.inline.hpp"
  73 #include "runtime/init.hpp"
  74 #include "runtime/javaThread.hpp"
  75 #include "runtime/jniHandles.inline.hpp"
  76 #include "runtime/reflection.hpp"
  77 #include "runtime/safepointVerifiers.hpp"
  78 #include "runtime/sharedRuntime.hpp"
  79 #include "utilities/dtrace.hpp"
  80 #include "utilities/macros.hpp"
  81 #ifdef COMPILER1
  82 #include "c1/c1_Runtime1.hpp"
  83 #endif
  84 #ifdef COMPILER2
  85 #include "opto/runtime.hpp"
  86 #endif
  87 
  88 // ciEnv
  89 //
  90 // This class is the top level broker for requests from the compiler
  91 // to the VM.
  92 
  93 ciObject*              ciEnv::_null_object_instance;
  94 
  95 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
  96 VM_CLASSES_DO(VM_CLASS_DEFN)
  97 #undef VM_CLASS_DEFN
  98 
  99 ciSymbol*        ciEnv::_unloaded_cisymbol = nullptr;
 100 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
 101 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
 102 
 103 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = nullptr;
 104 jobject ciEnv::_ArrayStoreException_handle = nullptr;
 105 jobject ciEnv::_ClassCastException_handle = nullptr;
 106 
 107 #ifndef PRODUCT
 108 static bool firstEnv = true;
 109 #endif /* PRODUCT */
 110 
 111 // ------------------------------------------------------------------
 112 // ciEnv::ciEnv
 113 ciEnv::ciEnv(CompileTask* task)
 114   : _ciEnv_arena(mtCompiler) {
 115   VM_ENTRY_MARK;
 116 
 117   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
 118   thread->set_env(this);
 119   assert(ciEnv::current() == this, "sanity");
 120 
 121   _oop_recorder = nullptr;
 122   _debug_info = nullptr;
 123   _dependencies = nullptr;
 124   _failure_reason = nullptr;
 125   _inc_decompile_count_on_failure = true;
 126   _compilable = MethodCompilable;
 127   _break_at_compile = false;
 128   _compiler_data = nullptr;
 129 #ifndef PRODUCT
 130   assert(!firstEnv, "not initialized properly");
 131 #endif /* !PRODUCT */
 132 
 133   _num_inlined_bytecodes = 0;
 134   assert(task == nullptr || thread->task() == task, "sanity");
 135   if (task != nullptr) {
 136     task->mark_started(os::elapsed_counter());
 137   }
 138   _task = task;
 139   _log = nullptr;
 140 
 141   // Temporary buffer for creating symbols and such.
 142   _name_buffer = nullptr;
 143   _name_buffer_len = 0;
 144 
 145   _arena   = &_ciEnv_arena;
 146   _factory = new (_arena) ciObjectFactory(_arena, 128);
 147 
 148   // Preload commonly referenced system ciObjects.
 149 
 150   // During VM initialization, these instances have not yet been created.
 151   // Assertions ensure that these instances are not accessed before
 152   // their initialization.
 153 
 154   assert(Universe::is_fully_initialized(), "should be complete");
 155 
 156   oop o = Universe::null_ptr_exception_instance();
 157   assert(o != nullptr, "should have been initialized");
 158   _NullPointerException_instance = get_object(o)->as_instance();
 159   o = Universe::arithmetic_exception_instance();
 160   assert(o != nullptr, "should have been initialized");
 161   _ArithmeticException_instance = get_object(o)->as_instance();
 162 
 163   _ArrayIndexOutOfBoundsException_instance = nullptr;
 164   _ArrayStoreException_instance = nullptr;
 165   _ClassCastException_instance = nullptr;
 166   _the_null_string = nullptr;
 167   _the_min_jint_string = nullptr;
 168 
 169   _jvmti_redefinition_count = 0;
 170   _jvmti_can_hotswap_or_post_breakpoint = false;
 171   _jvmti_can_access_local_variables = false;
 172   _jvmti_can_post_on_exceptions = false;
 173   _jvmti_can_pop_frame = false;
 174 
 175   _dyno_klasses = nullptr;
 176   _dyno_locs = nullptr;
 177   _dyno_name[0] = '\0';
 178 }
 179 
 180 // Record components of a location descriptor string.  Components are appended by the constructor and
 181 // removed by the destructor, like a stack, so scope matters.  These location descriptors are used to
 182 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
 183 //
 184 // Example use:
 185 //
 186 // {
 187 //   RecordLocation fp(this, "field1");
 188 //   // location: "field1"
 189 //   { RecordLocation fp(this, " field2"); // location: "field1 field2" }
 190 //   // location: "field1"
 191 //   { RecordLocation fp(this, " field3"); // location: "field1 field3" }
 192 //   // location: "field1"
 193 // }
 194 // // location: ""
 195 //
 196 // Examples of actual locations
 197 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
 198 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
 199 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
 200 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
 201 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
 202 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
 203 class RecordLocation {
 204 private:
 205   char* end;
 206 
 207   ATTRIBUTE_PRINTF(3, 4)
 208   void push(ciEnv* ci, const char* fmt, ...) {
 209     va_list args;
 210     va_start(args, fmt);
 211     push_va(ci, fmt, args);
 212     va_end(args);
 213   }
 214 
 215 public:
 216   ATTRIBUTE_PRINTF(3, 0)
 217   void push_va(ciEnv* ci, const char* fmt, va_list args) {
 218     char *e = ci->_dyno_name + strlen(ci->_dyno_name);
 219     char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
 220     os::vsnprintf(e, m - e, fmt, args);
 221     assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
 222   }
 223 
 224   // append a new component
 225   ATTRIBUTE_PRINTF(3, 4)
 226   RecordLocation(ciEnv* ci, const char* fmt, ...) {
 227     end = ci->_dyno_name + strlen(ci->_dyno_name);
 228     va_list args;
 229     va_start(args, fmt);
 230     push(ci, " ");
 231     push_va(ci, fmt, args);
 232     va_end(args);
 233   }
 234 
 235   // reset to previous state
 236   ~RecordLocation() {
 237     *end = '\0';
 238   }
 239 };
 240 
 241 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
 242   ASSERT_IN_VM;
 243 
 244   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
 245   CompilerThread* current_thread = CompilerThread::current();
 246   assert(current_thread->env() == nullptr, "must be");
 247   current_thread->set_env(this);
 248   assert(ciEnv::current() == this, "sanity");
 249 
 250   _oop_recorder = nullptr;
 251   _debug_info = nullptr;
 252   _dependencies = nullptr;
 253   _failure_reason = nullptr;
 254   _inc_decompile_count_on_failure = true;
 255   _compilable = MethodCompilable_never;
 256   _break_at_compile = false;
 257   _compiler_data = nullptr;
 258 #ifndef PRODUCT
 259   assert(firstEnv, "must be first");
 260   firstEnv = false;
 261 #endif /* !PRODUCT */
 262 
 263   _num_inlined_bytecodes = 0;
 264   _task = nullptr;
 265   _log = nullptr;
 266 
 267   // Temporary buffer for creating symbols and such.
 268   _name_buffer = nullptr;
 269   _name_buffer_len = 0;
 270 
 271   _arena   = arena;
 272   _factory = new (_arena) ciObjectFactory(_arena, 128);
 273 
 274   // Preload commonly referenced system ciObjects.
 275 
 276   // During VM initialization, these instances have not yet been created.
 277   // Assertions ensure that these instances are not accessed before
 278   // their initialization.
 279 
 280   assert(Universe::is_fully_initialized(), "must be");
 281 
 282   _NullPointerException_instance = nullptr;
 283   _ArithmeticException_instance = nullptr;
 284   _ArrayIndexOutOfBoundsException_instance = nullptr;
 285   _ArrayStoreException_instance = nullptr;
 286   _ClassCastException_instance = nullptr;
 287   _the_null_string = nullptr;
 288   _the_min_jint_string = nullptr;
 289 
 290   _jvmti_redefinition_count = 0;
 291   _jvmti_can_hotswap_or_post_breakpoint = false;
 292   _jvmti_can_access_local_variables = false;
 293   _jvmti_can_post_on_exceptions = false;
 294   _jvmti_can_pop_frame = false;
 295 
 296   _dyno_klasses = nullptr;
 297   _dyno_locs = nullptr;
 298 }
 299 
 300 ciEnv::~ciEnv() {
 301   GUARDED_VM_ENTRY(
 302       CompilerThread* current_thread = CompilerThread::current();
 303       _factory->remove_symbols();
 304       // Need safepoint to clear the env on the thread.  RedefineClasses might
 305       // be reading it.
 306       current_thread->set_env(nullptr);
 307   )
 308 }
 309 
 310 // ------------------------------------------------------------------
 311 // Cache Jvmti state
 312 bool ciEnv::cache_jvmti_state() {
 313   VM_ENTRY_MARK;
 314   // Get Jvmti capabilities under lock to get consistent values.
 315   MutexLocker mu(JvmtiThreadState_lock);
 316   _jvmti_redefinition_count             = JvmtiExport::redefinition_count();
 317   _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
 318   _jvmti_can_access_local_variables     = JvmtiExport::can_access_local_variables();
 319   _jvmti_can_post_on_exceptions         = JvmtiExport::can_post_on_exceptions();
 320   _jvmti_can_pop_frame                  = JvmtiExport::can_pop_frame();
 321   _jvmti_can_get_owned_monitor_info     = JvmtiExport::can_get_owned_monitor_info();
 322   _jvmti_can_walk_any_space             = JvmtiExport::can_walk_any_space();
 323   return _task != nullptr && _task->method()->is_old();
 324 }
 325 
 326 bool ciEnv::jvmti_state_changed() const {
 327   // Some classes were redefined
 328   if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
 329     return true;
 330   }
 331 
 332   if (!_jvmti_can_access_local_variables &&
 333       JvmtiExport::can_access_local_variables()) {
 334     return true;
 335   }
 336   if (!_jvmti_can_hotswap_or_post_breakpoint &&
 337       JvmtiExport::can_hotswap_or_post_breakpoint()) {
 338     return true;
 339   }
 340   if (!_jvmti_can_post_on_exceptions &&
 341       JvmtiExport::can_post_on_exceptions()) {
 342     return true;
 343   }
 344   if (!_jvmti_can_pop_frame &&
 345       JvmtiExport::can_pop_frame()) {
 346     return true;
 347   }
 348   if (!_jvmti_can_get_owned_monitor_info &&
 349       JvmtiExport::can_get_owned_monitor_info()) {
 350     return true;
 351   }
 352   if (!_jvmti_can_walk_any_space &&
 353       JvmtiExport::can_walk_any_space()) {
 354     return true;
 355   }
 356 
 357   return false;
 358 }
 359 
 360 // ------------------------------------------------------------------
 361 // Cache DTrace flags
 362 void ciEnv::cache_dtrace_flags() {
 363   // Need lock?
 364   _dtrace_method_probes = DTraceMethodProbes;
 365   _dtrace_alloc_probes  = DTraceAllocProbes;
 366 }
 367 
 368 // ------------------------------------------------------------------
 369 // helper for lazy exception creation
 370 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
 371   VM_ENTRY_MARK;
 372   if (handle == nullptr) {
 373     // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
 374     InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
 375     jobject objh = nullptr;
 376     if (ik != nullptr) {
 377       oop obj = ik->allocate_instance(THREAD);
 378       if (!HAS_PENDING_EXCEPTION)
 379         objh = JNIHandles::make_global(Handle(THREAD, obj));
 380     }
 381     if (HAS_PENDING_EXCEPTION) {
 382       CLEAR_PENDING_EXCEPTION;
 383     } else {
 384       handle = objh;
 385     }
 386   }
 387   oop obj = JNIHandles::resolve(handle);
 388   return obj == nullptr? nullptr: get_object(obj)->as_instance();
 389 }
 390 
 391 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
 392   switch (type) {
 393     case T_BOOLEAN: return Boolean_klass();
 394     case T_BYTE   : return Byte_klass();
 395     case T_CHAR   : return Character_klass();
 396     case T_SHORT  : return Short_klass();
 397     case T_INT    : return Integer_klass();
 398     case T_LONG   : return Long_klass();
 399     case T_FLOAT  : return Float_klass();
 400     case T_DOUBLE : return Double_klass();
 401 
 402     default:
 403       assert(false, "not a primitive: %s", type2name(type));
 404       return nullptr;
 405   }
 406 }
 407 
 408 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
 409   if (_ArrayIndexOutOfBoundsException_instance == nullptr) {
 410     _ArrayIndexOutOfBoundsException_instance
 411           = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
 412           vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 413   }
 414   return _ArrayIndexOutOfBoundsException_instance;
 415 }
 416 ciInstance* ciEnv::ArrayStoreException_instance() {
 417   if (_ArrayStoreException_instance == nullptr) {
 418     _ArrayStoreException_instance
 419           = get_or_create_exception(_ArrayStoreException_handle,
 420           vmSymbols::java_lang_ArrayStoreException());
 421   }
 422   return _ArrayStoreException_instance;
 423 }
 424 ciInstance* ciEnv::ClassCastException_instance() {
 425   if (_ClassCastException_instance == nullptr) {
 426     _ClassCastException_instance
 427           = get_or_create_exception(_ClassCastException_handle,
 428           vmSymbols::java_lang_ClassCastException());
 429   }
 430   return _ClassCastException_instance;
 431 }
 432 
 433 ciInstance* ciEnv::the_null_string() {
 434   if (_the_null_string == nullptr) {
 435     VM_ENTRY_MARK;
 436     _the_null_string = get_object(Universe::the_null_string())->as_instance();
 437   }
 438   return _the_null_string;
 439 }
 440 
 441 ciInstance* ciEnv::the_min_jint_string() {
 442   if (_the_min_jint_string == nullptr) {
 443     VM_ENTRY_MARK;
 444     _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
 445   }
 446   return _the_min_jint_string;
 447 }
 448 
 449 // ------------------------------------------------------------------
 450 // ciEnv::get_method_from_handle
 451 ciMethod* ciEnv::get_method_from_handle(Method* method) {
 452   VM_ENTRY_MARK;
 453   return get_metadata(method)->as_method();
 454 }
 455 
 456 // ------------------------------------------------------------------
 457 // ciEnv::check_klass_accessiblity
 458 //
 459 // Note: the logic of this method should mirror the logic of
 460 // ConstantPool::verify_constant_pool_resolve.
 461 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
 462                                       Klass* resolved_klass) {
 463   if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
 464     return true;
 465   }
 466   if (accessing_klass->is_obj_array_klass()) {
 467     accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
 468   }
 469   if (!accessing_klass->is_instance_klass()) {
 470     return true;
 471   }
 472 
 473   if (resolved_klass->is_objArray_klass()) {
 474     // Find the element klass, if this is an array.
 475     resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
 476   }
 477   if (resolved_klass->is_instance_klass()) {
 478     return (Reflection::verify_class_access(accessing_klass->get_Klass(),
 479                                             InstanceKlass::cast(resolved_klass),
 480                                             true) == Reflection::ACCESS_OK);
 481   }
 482   return true;
 483 }
 484 
 485 // ------------------------------------------------------------------
 486 // ciEnv::get_klass_by_name_impl
 487 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
 488                                        const constantPoolHandle& cpool,
 489                                        ciSymbol* name,
 490                                        bool require_local) {
 491   ASSERT_IN_VM;
 492   Thread* current = Thread::current();
 493 
 494   // Now we need to check the SystemDictionary
 495   Symbol* sym = name->get_symbol();
 496   if (Signature::has_envelope(sym)) {
 497     // This is a name from a signature.  Strip off the trimmings.
 498     // Call recursive to keep scope of strippedsym.
 499     TempNewSymbol strippedsym = Signature::strip_envelope(sym);
 500     ciSymbol* strippedname = get_symbol(strippedsym);
 501     return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
 502   }
 503 
 504   // Check for prior unloaded klass.  The SystemDictionary's answers
 505   // can vary over time but the compiler needs consistency.
 506   ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
 507   if (unloaded_klass != nullptr) {
 508     if (require_local)  return nullptr;
 509     return unloaded_klass;
 510   }
 511 
 512   Handle loader;
 513   Handle domain;
 514   if (accessing_klass != nullptr) {
 515     loader = Handle(current, accessing_klass->loader());
 516     domain = Handle(current, accessing_klass->protection_domain());
 517   }
 518 
 519   Klass* found_klass = require_local ?
 520                          SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
 521                          SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
 522 
 523   // If we fail to find an array klass, look again for its element type.
 524   // The element type may be available either locally or via constraints.
 525   // In either case, if we can find the element type in the system dictionary,
 526   // we must build an array type around it.  The CI requires array klasses
 527   // to be loaded if their element klasses are loaded, except when memory
 528   // is exhausted.
 529   if (Signature::is_array(sym) &&
 530       (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
 531        sym->char_at(1) == JVM_SIGNATURE_CLASS ||
 532        sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT )) {
 533     // We have an unloaded array.
 534     // Build it on the fly if the element class exists.
 535     SignatureStream ss(sym, false);
 536     ss.skip_array_prefix(1);
 537     // Get element ciKlass recursively.
 538     ciKlass* elem_klass =
 539       get_klass_by_name_impl(accessing_klass,
 540                              cpool,
 541                              get_symbol(ss.as_symbol()),
 542                              require_local);
 543     if (elem_klass != nullptr && elem_klass->is_loaded()) {
 544       // Now make an array for it
 545       bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT;
 546       return ciArrayKlass::make(elem_klass, null_free_array);
 547     }
 548   }
 549 
 550   if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
 551     // Look inside the constant pool for pre-resolved class entries.
 552     for (int i = cpool->length() - 1; i >= 1; i--) {
 553       if (cpool->tag_at(i).is_klass()) {
 554         Klass* kls = cpool->resolved_klass_at(i);
 555         if (kls->name() == sym) {
 556           found_klass = kls;
 557           break;
 558         }
 559       }
 560     }
 561   }
 562 
 563   if (found_klass != nullptr) {
 564     // Found it.  Build a CI handle.
 565     return get_klass(found_klass);
 566   }
 567 
 568   if (require_local)  return nullptr;
 569 
 570   // Not yet loaded into the VM, or not governed by loader constraints.
 571   // Make a CI representative for it.
 572   int i = 0;
 573   while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
 574     i++;
 575   }
 576   if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
 577     // An unloaded array class of inline types is an ObjArrayKlass, an
 578     // unloaded inline type class is an InstanceKlass. For consistency,
 579     // make the signature of the unloaded array of inline type use L
 580     // rather than Q.
 581     char* new_name = name_buffer(sym->utf8_length()+1);
 582     strncpy(new_name, (char*)sym->base(), sym->utf8_length());
 583     new_name[i] = JVM_SIGNATURE_CLASS;
 584     new_name[sym->utf8_length()] = '\0';
 585     return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name));
 586   }
 587   return get_unloaded_klass(accessing_klass, name);
 588 }
 589 
 590 // ------------------------------------------------------------------
 591 // ciEnv::get_klass_by_name
 592 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
 593                                   ciSymbol* klass_name,
 594                                   bool require_local) {
 595   GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
 596                                                  constantPoolHandle(),
 597                                                  klass_name,
 598                                                  require_local);)
 599 }
 600 
 601 // ------------------------------------------------------------------
 602 // ciEnv::get_klass_by_index_impl
 603 //
 604 // Implementation of get_klass_by_index.
 605 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
 606                                         int index,
 607                                         bool& is_accessible,
 608                                         ciInstanceKlass* accessor) {
 609   Klass* klass = nullptr;
 610   Symbol* klass_name = nullptr;
 611 
 612   if (cpool->tag_at(index).is_symbol()) {
 613     klass_name = cpool->symbol_at(index);
 614   } else {
 615     // Check if it's resolved if it's not a symbol constant pool entry.
 616     klass = ConstantPool::klass_at_if_loaded(cpool, index);
 617     // Try to look it up by name.
 618     if (klass == nullptr) {
 619       klass_name = cpool->klass_name_at(index);
 620     }
 621   }
 622 
 623   if (klass == nullptr) {
 624     // Not found in constant pool.  Use the name to do the lookup.
 625     ciKlass* k = get_klass_by_name_impl(accessor,
 626                                         cpool,
 627                                         get_symbol(klass_name),
 628                                         false);
 629     // Calculate accessibility the hard way.
 630     if (!k->is_loaded()) {
 631       is_accessible = false;
 632     } else if (k->loader() != accessor->loader() &&
 633                get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
 634       // Loaded only remotely.  Not linked yet.
 635       is_accessible = false;
 636     } else {
 637       // Linked locally, and we must also check public/private, etc.
 638       is_accessible = check_klass_accessibility(accessor, k->get_Klass());
 639     }
 640     return k;
 641   }
 642 
 643   // Check for prior unloaded klass.  The SystemDictionary's answers
 644   // can vary over time but the compiler needs consistency.
 645   ciSymbol* name = get_symbol(klass->name());
 646   ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
 647   if (unloaded_klass != nullptr) {
 648     is_accessible = false;
 649     return unloaded_klass;
 650   }
 651 
 652   // It is known to be accessible, since it was found in the constant pool.
 653   ciKlass* ciKlass = get_klass(klass);
 654   is_accessible = true;
 655   if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
 656     // Klass was unresolved at replay dump time and therefore not accessible.
 657     is_accessible = false;
 658   }
 659   return ciKlass;
 660 }
 661 
 662 // ------------------------------------------------------------------
 663 // ciEnv::get_klass_by_index
 664 //
 665 // Get a klass from the constant pool.
 666 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
 667                                    int index,
 668                                    bool& is_accessible,
 669                                    ciInstanceKlass* accessor) {
 670   GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
 671 }
 672 
 673 // ------------------------------------------------------------------
 674 // ciEnv::is_inline_klass
 675 //
 676 // Check if the klass is an inline klass.
 677 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) {
 678   GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();)
 679 }
 680 
 681 // ------------------------------------------------------------------
 682 // ciEnv::unbox_primitive_value
 683 //
 684 // Unbox a primitive and return it as a ciConstant.
 685 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
 686   jvalue value;
 687   BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
 688   if (bt != expected_bt && expected_bt != T_ILLEGAL) {
 689     assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
 690     return ciConstant();
 691   }
 692   switch (bt) {
 693     case T_BOOLEAN: return ciConstant(bt, value.z);
 694     case T_BYTE:    return ciConstant(bt, value.b);
 695     case T_SHORT:   return ciConstant(bt, value.s);
 696     case T_CHAR:    return ciConstant(bt, value.c);
 697     case T_INT:     return ciConstant(bt, value.i);
 698     case T_LONG:    return ciConstant(value.j);
 699     case T_FLOAT:   return ciConstant(value.f);
 700     case T_DOUBLE:  return ciConstant(value.d);
 701 
 702     default:
 703       assert(false, "not a primitive type: %s", type2name(bt));
 704       return ciConstant();
 705   }
 706 }
 707 
 708 // ------------------------------------------------------------------
 709 // ciEnv::get_resolved_constant
 710 //
 711 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
 712   assert(obj_index >= 0, "");
 713   oop obj = cpool->resolved_reference_at(obj_index);
 714   if (obj == nullptr) {
 715     // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
 716     // Null constant is represented as a sentinel (non-null) value.
 717     return ciConstant();
 718   } else if (obj == Universe::the_null_sentinel()) {
 719     return ciConstant(T_OBJECT, get_object(nullptr));
 720   } else {
 721     ciObject* ciobj = get_object(obj);
 722     if (ciobj->is_array()) {
 723       return ciConstant(T_ARRAY, ciobj);
 724     } else {
 725       int cp_index = cpool->object_to_cp_index(obj_index);
 726       BasicType bt = cpool->basic_type_for_constant_at(cp_index);
 727       if (is_java_primitive(bt)) {
 728         assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
 729         return unbox_primitive_value(ciobj, bt);
 730       } else {
 731         assert(ciobj->is_instance(), "should be an instance");
 732         return ciConstant(T_OBJECT, ciobj);
 733       }
 734     }
 735   }
 736 }
 737 
 738 // ------------------------------------------------------------------
 739 // ciEnv::get_constant_by_index_impl
 740 //
 741 // Implementation of get_constant_by_index().
 742 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
 743                                              int index, int obj_index,
 744                                              ciInstanceKlass* accessor) {
 745   if (obj_index >= 0) {
 746     ciConstant con = get_resolved_constant(cpool, obj_index);
 747     if (con.is_valid()) {
 748       return con;
 749     }
 750   }
 751   constantTag tag = cpool->tag_at(index);
 752   if (tag.is_int()) {
 753     return ciConstant(T_INT, (jint)cpool->int_at(index));
 754   } else if (tag.is_long()) {
 755     return ciConstant((jlong)cpool->long_at(index));
 756   } else if (tag.is_float()) {
 757     return ciConstant((jfloat)cpool->float_at(index));
 758   } else if (tag.is_double()) {
 759     return ciConstant((jdouble)cpool->double_at(index));
 760   } else if (tag.is_string()) {
 761     EXCEPTION_CONTEXT;
 762     assert(obj_index >= 0, "should have an object index");
 763     oop string = cpool->string_at(index, obj_index, THREAD);
 764     if (HAS_PENDING_EXCEPTION) {
 765       CLEAR_PENDING_EXCEPTION;
 766       record_out_of_memory_failure();
 767       return ciConstant();
 768     }
 769     ciInstance* constant = get_object(string)->as_instance();
 770     return ciConstant(T_OBJECT, constant);
 771   } else if (tag.is_unresolved_klass_in_error()) {
 772     return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
 773   } else if (tag.is_klass() || tag.is_unresolved_klass()) {
 774     bool will_link;
 775     ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
 776     ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
 777     if (klass->is_loaded() && tag.is_Qdescriptor_klass()) {
 778       return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror());
 779     } else {
 780       return ciConstant(T_OBJECT, mirror);
 781     }
 782   } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
 783     // must execute Java code to link this CP entry into cache[i].f1
 784     assert(obj_index >= 0, "should have an object index");
 785     ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
 786     ciObject* ciobj = get_unloaded_method_type_constant(signature);
 787     return ciConstant(T_OBJECT, ciobj);
 788   } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
 789     // must execute Java code to link this CP entry into cache[i].f1
 790     assert(obj_index >= 0, "should have an object index");
 791     bool ignore_will_link;
 792     int ref_kind        = cpool->method_handle_ref_kind_at(index);
 793     int callee_index    = cpool->method_handle_klass_index_at(index);
 794     ciKlass* callee     = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
 795     ciSymbol* name      = get_symbol(cpool->method_handle_name_ref_at(index));
 796     ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
 797     ciObject* ciobj     = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
 798     return ciConstant(T_OBJECT, ciobj);
 799   } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
 800     assert(obj_index >= 0, "should have an object index");
 801     return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
 802   } else {
 803     assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
 804     return ciConstant();
 805   }
 806 }
 807 
 808 // ------------------------------------------------------------------
 809 // ciEnv::get_constant_by_index
 810 //
 811 // Pull a constant out of the constant pool.  How appropriate.
 812 //
 813 // Implementation note: this query is currently in no way cached.
 814 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
 815                                         int pool_index, int cache_index,
 816                                         ciInstanceKlass* accessor) {
 817   GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
 818 }
 819 
 820 // ------------------------------------------------------------------
 821 // ciEnv::get_field_by_index_impl
 822 //
 823 // Implementation of get_field_by_index.
 824 //
 825 // Implementation note: the results of field lookups are cached
 826 // in the accessor klass.
 827 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
 828                                         int index) {
 829   ciConstantPoolCache* cache = accessor->field_cache();
 830   if (cache == nullptr) {
 831     ciField* field = new (arena()) ciField(accessor, index);
 832     return field;
 833   } else {
 834     ciField* field = (ciField*)cache->get(index);
 835     if (field == nullptr) {
 836       field = new (arena()) ciField(accessor, index);
 837       cache->insert(index, field);
 838     }
 839     return field;
 840   }
 841 }
 842 
 843 // ------------------------------------------------------------------
 844 // ciEnv::get_field_by_index
 845 //
 846 // Get a field by index from a klass's constant pool.
 847 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
 848                                    int index) {
 849   GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
 850 }
 851 
 852 // ------------------------------------------------------------------
 853 // ciEnv::lookup_method
 854 //
 855 // Perform an appropriate method lookup based on accessor, holder,
 856 // name, signature, and bytecode.
 857 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
 858                              ciKlass*         holder,
 859                              Symbol*          name,
 860                              Symbol*          sig,
 861                              Bytecodes::Code  bc,
 862                              constantTag      tag) {
 863   InstanceKlass* accessor_klass = accessor->get_instanceKlass();
 864   Klass* holder_klass = holder->get_Klass();
 865 
 866   // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
 867   assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
 868 
 869   LinkInfo link_info(holder_klass, name, sig, accessor_klass,
 870                      LinkInfo::AccessCheck::required,
 871                      LinkInfo::LoaderConstraintCheck::required,
 872                      tag);
 873   switch (bc) {
 874     case Bytecodes::_invokestatic:
 875       return LinkResolver::resolve_static_call_or_null(link_info);
 876     case Bytecodes::_invokespecial:
 877       return LinkResolver::resolve_special_call_or_null(link_info);
 878     case Bytecodes::_invokeinterface:
 879       return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
 880     case Bytecodes::_invokevirtual:
 881       return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
 882     default:
 883       fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
 884       return nullptr; // silence compiler warnings
 885   }
 886 }
 887 
 888 
 889 // ------------------------------------------------------------------
 890 // ciEnv::get_method_by_index_impl
 891 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
 892                                           int index, Bytecodes::Code bc,
 893                                           ciInstanceKlass* accessor) {
 894   assert(cpool.not_null(), "need constant pool");
 895   assert(accessor != nullptr, "need origin of access");
 896   if (bc == Bytecodes::_invokedynamic) {
 897     // FIXME: code generation could allow for null (unlinked) call site
 898     // The call site could be made patchable as follows:
 899     // Load the appendix argument from the constant pool.
 900     // Test the appendix argument and jump to a known deopt routine if it is null.
 901     // Jump through a patchable call site, which is initially a deopt routine.
 902     // Patch the call site to the nmethod entry point of the static compiled lambda form.
 903     // As with other two-component call sites, both values must be independently verified.
 904     int indy_index = cpool->decode_invokedynamic_index(index);
 905     assert (indy_index >= 0, "should be");
 906     assert(indy_index < cpool->cache()->resolved_indy_entries_length(), "impossible");
 907     Method* adapter = cpool->resolved_indy_entry_at(indy_index)->method();
 908     // Resolved if the adapter is non null.
 909     if (adapter != nullptr) {
 910       return get_method(adapter);
 911     }
 912 
 913     // Fake a method that is equivalent to a declared method.
 914     ciInstanceKlass* holder    = get_instance_klass(vmClasses::MethodHandle_klass());
 915     ciSymbol*        name      = ciSymbols::invokeBasic_name();
 916     ciSymbol*        signature = get_symbol(cpool->signature_ref_at(index));
 917     return get_unloaded_method(holder, name, signature, accessor);
 918   } else {
 919     const int holder_index = cpool->klass_ref_index_at(index);
 920     bool holder_is_accessible;
 921     ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
 922 
 923     // Get the method's name and signature.
 924     Symbol* name_sym = cpool->name_ref_at(index);
 925     Symbol* sig_sym  = cpool->signature_ref_at(index);
 926 
 927     if (cpool->has_preresolution()
 928         || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
 929             MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
 930       // Short-circuit lookups for JSR 292-related call sites.
 931       // That is, do not rely only on name-based lookups, because they may fail
 932       // if the names are not resolvable in the boot class loader (7056328).
 933       switch (bc) {
 934       case Bytecodes::_invokevirtual:
 935       case Bytecodes::_invokeinterface:
 936       case Bytecodes::_invokespecial:
 937       case Bytecodes::_invokestatic:
 938         {
 939           Method* m = ConstantPool::method_at_if_loaded(cpool, index);
 940           if (m != nullptr) {
 941             return get_method(m);
 942           }
 943         }
 944         break;
 945       default:
 946         break;
 947       }
 948     }
 949 
 950     if (holder_is_accessible) {  // Our declared holder is loaded.
 951       constantTag tag = cpool->tag_ref_at(index);
 952       assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
 953       Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
 954       if (m != nullptr &&
 955           (bc == Bytecodes::_invokestatic
 956            ?  m->method_holder()->is_not_initialized()
 957            : !m->method_holder()->is_loaded())) {
 958         m = nullptr;
 959       }
 960       if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
 961         m = nullptr;
 962       }
 963       if (m != nullptr) {
 964         // We found the method.
 965         return get_method(m);
 966       }
 967     }
 968 
 969     // Either the declared holder was not loaded, or the method could
 970     // not be found.  Create a dummy ciMethod to represent the failed
 971     // lookup.
 972     ciSymbol* name      = get_symbol(name_sym);
 973     ciSymbol* signature = get_symbol(sig_sym);
 974     return get_unloaded_method(holder, name, signature, accessor);
 975   }
 976 }
 977 
 978 
 979 // ------------------------------------------------------------------
 980 // ciEnv::get_instance_klass_for_declared_method_holder
 981 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
 982   // For the case of <array>.clone(), the method holder can be a ciArrayKlass
 983   // instead of a ciInstanceKlass.  For that case simply pretend that the
 984   // declared holder is Object.clone since that's where the call will bottom out.
 985   // A more correct fix would trickle out through many interfaces in CI,
 986   // requiring ciInstanceKlass* to become ciKlass* and many more places would
 987   // require checks to make sure the expected type was found.  Given that this
 988   // only occurs for clone() the more extensive fix seems like overkill so
 989   // instead we simply smear the array type into Object.
 990   guarantee(method_holder != nullptr, "no method holder");
 991   if (method_holder->is_instance_klass()) {
 992     return method_holder->as_instance_klass();
 993   } else if (method_holder->is_array_klass()) {
 994     return current()->Object_klass();
 995   } else {
 996     ShouldNotReachHere();
 997   }
 998   return nullptr;
 999 }
1000 
1001 
1002 // ------------------------------------------------------------------
1003 // ciEnv::get_method_by_index
1004 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
1005                                      int index, Bytecodes::Code bc,
1006                                      ciInstanceKlass* accessor) {
1007   GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
1008 }
1009 
1010 
1011 // ------------------------------------------------------------------
1012 // ciEnv::name_buffer
1013 char *ciEnv::name_buffer(int req_len) {
1014   if (_name_buffer_len < req_len) {
1015     if (_name_buffer == nullptr) {
1016       _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
1017       _name_buffer_len = req_len;
1018     } else {
1019       _name_buffer =
1020         (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
1021       _name_buffer_len = req_len;
1022     }
1023   }
1024   return _name_buffer;
1025 }
1026 
1027 // ------------------------------------------------------------------
1028 // ciEnv::is_in_vm
1029 bool ciEnv::is_in_vm() {
1030   return JavaThread::current()->thread_state() == _thread_in_vm;
1031 }
1032 
1033 // ------------------------------------------------------------------
1034 // ciEnv::validate_compile_task_dependencies
1035 //
1036 // Check for changes during compilation (e.g. class loads, evolution,
1037 // breakpoints, call site invalidation).
1038 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1039   if (failing())  return;  // no need for further checks
1040 
1041   Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1042   if (result != Dependencies::end_marker) {
1043     if (result == Dependencies::call_site_target_value) {
1044       _inc_decompile_count_on_failure = false;
1045       record_failure("call site target change");
1046     } else if (Dependencies::is_klass_type(result)) {
1047       record_failure("concurrent class loading");
1048     } else {
1049       record_failure("invalid non-klass dependency");
1050     }
1051   }
1052 }
1053 
1054 // ------------------------------------------------------------------
1055 // ciEnv::register_method
1056 void ciEnv::register_method(ciMethod* target,
1057                             int entry_bci,
1058                             CodeOffsets* offsets,
1059                             int orig_pc_offset,
1060                             CodeBuffer* code_buffer,
1061                             int frame_words,
1062                             OopMapSet* oop_map_set,
1063                             ExceptionHandlerTable* handler_table,
1064                             ImplicitExceptionTable* inc_table,
1065                             AbstractCompiler* compiler,
1066                             bool has_unsafe_access,
1067                             bool has_wide_vectors,
1068                             bool has_monitors,
1069                             int immediate_oops_patched,
1070                             RTMState  rtm_state) {
1071   VM_ENTRY_MARK;
1072   nmethod* nm = nullptr;
1073   {
1074     methodHandle method(THREAD, target->get_Method());
1075 
1076     // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1077     if (method->get_method_counters(THREAD) == nullptr) {
1078       record_failure("can't create method counters");
1079       // All buffers in the CodeBuffer are allocated in the CodeCache.
1080       // If the code buffer is created on each compile attempt
1081       // as in C2, then it must be freed.
1082       code_buffer->free_blob();
1083       return;
1084     }
1085 
1086     // Check if memory should be freed before allocation
1087     CodeCache::gc_on_allocation();
1088 
1089     // To prevent compile queue updates.
1090     MutexLocker locker(THREAD, MethodCompileQueue_lock);
1091 
1092     // Prevent InstanceKlass::add_to_hierarchy from running
1093     // and invalidating our dependencies until we install this method.
1094     // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1095     MutexLocker ml(Compile_lock);
1096     NoSafepointVerifier nsv;
1097 
1098     // Change in Jvmti state may invalidate compilation.
1099     if (!failing() && jvmti_state_changed()) {
1100       record_failure("Jvmti state change invalidated dependencies");
1101     }
1102 
1103     // Change in DTrace flags may invalidate compilation.
1104     if (!failing() &&
1105         ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1106           (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1107       record_failure("DTrace flags change invalidated dependencies");
1108     }
1109 
1110     if (!failing() && target->needs_clinit_barrier() &&
1111         target->holder()->is_in_error_state()) {
1112       record_failure("method holder is in error state");
1113     }
1114 
1115     if (!failing()) {
1116       if (log() != nullptr) {
1117         // Log the dependencies which this compilation declares.
1118         dependencies()->log_all_dependencies();
1119       }
1120 
1121       // Encode the dependencies now, so we can check them right away.
1122       dependencies()->encode_content_bytes();
1123 
1124       // Check for {class loads, evolution, breakpoints, ...} during compilation
1125       validate_compile_task_dependencies(target);
1126     }
1127 #if INCLUDE_RTM_OPT
1128     if (!failing() && (rtm_state != NoRTM) &&
1129         (method()->method_data() != nullptr) &&
1130         (method()->method_data()->rtm_state() != rtm_state)) {
1131       // Preemptive decompile if rtm state was changed.
1132       record_failure("RTM state change invalidated rtm code");
1133     }
1134 #endif
1135 
1136     if (failing()) {
1137       // While not a true deoptimization, it is a preemptive decompile.
1138       MethodData* mdo = method()->method_data();
1139       if (mdo != nullptr && _inc_decompile_count_on_failure) {
1140         mdo->inc_decompile_count();
1141       }
1142 
1143       // All buffers in the CodeBuffer are allocated in the CodeCache.
1144       // If the code buffer is created on each compile attempt
1145       // as in C2, then it must be freed.
1146       code_buffer->free_blob();
1147       return;
1148     }
1149 
1150     assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1151     assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1152 
1153     nm =  nmethod::new_nmethod(method,
1154                                compile_id(),
1155                                entry_bci,
1156                                offsets,
1157                                orig_pc_offset,
1158                                debug_info(), dependencies(), code_buffer,
1159                                frame_words, oop_map_set,
1160                                handler_table, inc_table,
1161                                compiler, CompLevel(task()->comp_level()));
1162 
1163     // Free codeBlobs
1164     code_buffer->free_blob();
1165 
1166     if (nm != nullptr) {
1167       nm->set_has_unsafe_access(has_unsafe_access);
1168       nm->set_has_wide_vectors(has_wide_vectors);
1169       nm->set_has_monitors(has_monitors);
1170       assert(!method->is_synchronized() || nm->has_monitors(), "");
1171 #if INCLUDE_RTM_OPT
1172       nm->set_rtm_state(rtm_state);
1173 #endif
1174 
1175       if (entry_bci == InvocationEntryBci) {
1176         if (TieredCompilation) {
1177           // If there is an old version we're done with it
1178           CompiledMethod* old = method->code();
1179           if (TraceMethodReplacement && old != nullptr) {
1180             ResourceMark rm;
1181             char *method_name = method->name_and_sig_as_C_string();
1182             tty->print_cr("Replacing method %s", method_name);
1183           }
1184           if (old != nullptr) {
1185             old->make_not_used();
1186           }
1187         }
1188 
1189         LogTarget(Info, nmethod, install) lt;
1190         if (lt.is_enabled()) {
1191           ResourceMark rm;
1192           char *method_name = method->name_and_sig_as_C_string();
1193           lt.print("Installing method (%d) %s ",
1194                     task()->comp_level(), method_name);
1195         }
1196         // Allow the code to be executed
1197         MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1198         if (nm->make_in_use()) {
1199           method->set_code(method, nm);
1200         }
1201       } else {
1202         LogTarget(Info, nmethod, install) lt;
1203         if (lt.is_enabled()) {
1204           ResourceMark rm;
1205           char *method_name = method->name_and_sig_as_C_string();
1206           lt.print("Installing osr method (%d) %s @ %d",
1207                     task()->comp_level(), method_name, entry_bci);
1208         }
1209         MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1210         if (nm->make_in_use()) {
1211           method->method_holder()->add_osr_nmethod(nm);
1212         }
1213       }
1214     }
1215   }
1216 
1217   NoSafepointVerifier nsv;
1218   if (nm != nullptr) {
1219     // Compilation succeeded, post what we know about it
1220     nm->post_compiled_method(task());
1221     task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1222   } else {
1223     // The CodeCache is full.
1224     record_failure("code cache is full");
1225   }
1226 
1227   // safepoints are allowed again
1228 }
1229 
1230 // ------------------------------------------------------------------
1231 // ciEnv::find_system_klass
1232 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1233   VM_ENTRY_MARK;
1234   return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1235 }
1236 
1237 // ------------------------------------------------------------------
1238 // ciEnv::comp_level
1239 int ciEnv::comp_level() {
1240   if (task() == nullptr)  return CompilationPolicy::highest_compile_level();
1241   return task()->comp_level();
1242 }
1243 
1244 // ------------------------------------------------------------------
1245 // ciEnv::compile_id
1246 int ciEnv::compile_id() {
1247   if (task() == nullptr)  return 0;
1248   return task()->compile_id();
1249 }
1250 
1251 // ------------------------------------------------------------------
1252 // ciEnv::notice_inlined_method()
1253 void ciEnv::notice_inlined_method(ciMethod* method) {
1254   _num_inlined_bytecodes += method->code_size_for_inlining();
1255 }
1256 
1257 // ------------------------------------------------------------------
1258 // ciEnv::num_inlined_bytecodes()
1259 int ciEnv::num_inlined_bytecodes() const {
1260   return _num_inlined_bytecodes;
1261 }
1262 
1263 // ------------------------------------------------------------------
1264 // ciEnv::record_failure()
1265 void ciEnv::record_failure(const char* reason) {
1266   if (_failure_reason == nullptr) {
1267     // Record the first failure reason.
1268     _failure_reason = reason;
1269   }
1270 }
1271 
1272 void ciEnv::report_failure(const char* reason) {
1273   EventCompilationFailure event;
1274   if (event.should_commit()) {
1275     CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1276   }
1277 }
1278 
1279 // ------------------------------------------------------------------
1280 // ciEnv::record_method_not_compilable()
1281 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1282   int new_compilable =
1283     all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1284 
1285   // Only note transitions to a worse state
1286   if (new_compilable > _compilable) {
1287     if (log() != nullptr) {
1288       if (all_tiers) {
1289         log()->elem("method_not_compilable");
1290       } else {
1291         log()->elem("method_not_compilable_at_tier level='%d'",
1292                     current()->task()->comp_level());
1293       }
1294     }
1295     _compilable = new_compilable;
1296 
1297     // Reset failure reason; this one is more important.
1298     _failure_reason = nullptr;
1299     record_failure(reason);
1300   }
1301 }
1302 
1303 // ------------------------------------------------------------------
1304 // ciEnv::record_out_of_memory_failure()
1305 void ciEnv::record_out_of_memory_failure() {
1306   // If memory is low, we stop compiling methods.
1307   record_method_not_compilable("out of memory");
1308 }
1309 
1310 ciInstance* ciEnv::unloaded_ciinstance() {
1311   GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1312 }
1313 
1314 // ------------------------------------------------------------------
1315 // Replay support
1316 
1317 
1318 // Lookup location descriptor for the class, if any.
1319 // Returns false if not found.
1320 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1321   bool found = false;
1322   int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1323   if (!found) {
1324     return false;
1325   }
1326   loc = _dyno_locs->at(pos);
1327   return found;
1328 }
1329 
1330 // Associate the current location descriptor with the given class and record for later lookup.
1331 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1332   const char *loc = os::strdup(_dyno_name);
1333   bool found = false;
1334   int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1335   if (found) {
1336     _dyno_locs->at_put(pos, loc);
1337   } else {
1338     _dyno_klasses->insert_before(pos, ik);
1339     _dyno_locs->insert_before(pos, loc);
1340   }
1341 }
1342 
1343 // Associate the current location descriptor with the given class and record for later lookup.
1344 // If it turns out that there are multiple locations for the given class, that conflict should
1345 // be handled here.  Currently we choose the first location found.
1346 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1347   if (!ik->is_hidden()) {
1348     return;
1349   }
1350   const char *loc0;
1351   if (dyno_loc(ik, loc0)) {
1352     // TODO: found multiple references, see if we can improve
1353     if (Verbose) {
1354       tty->print_cr("existing call site @ %s for %s",
1355                      loc0, ik->external_name());
1356     }
1357   } else {
1358     set_dyno_loc(ik);
1359   }
1360 }
1361 
1362 // Look up the location descriptor for the given class and print it to the output stream.
1363 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1364   const char *loc;
1365   if (dyno_loc(ik, loc)) {
1366     out->print("%s", loc);
1367     return true;
1368   } else {
1369     return false;
1370   }
1371 }
1372 
1373 // Look up the location descriptor for the given class and return it as a string.
1374 // Returns null if no location is found.
1375 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1376   if (ik->is_hidden()) {
1377     stringStream ss;
1378     if (print_dyno_loc(&ss, ik)) {
1379       ss.print(" ;"); // add terminator
1380       const char* call_site = ss.as_string();
1381       return call_site;
1382     }
1383   }
1384   return nullptr;
1385 }
1386 
1387 // Look up the location descriptor for the given class and return it as a string.
1388 // Returns the class name as a fallback if no location is found.
1389 const char *ciEnv::replay_name(ciKlass* k) const {
1390   if (k->is_instance_klass()) {
1391     return replay_name(k->as_instance_klass()->get_instanceKlass());
1392   }
1393   return k->name()->as_quoted_ascii();
1394 }
1395 
1396 // Look up the location descriptor for the given class and return it as a string.
1397 // Returns the class name as a fallback if no location is found.
1398 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1399   const char* name = dyno_name(ik);
1400   if (name != nullptr) {
1401       return name;
1402   }
1403   return ik->name()->as_quoted_ascii();
1404 }
1405 
1406 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1407 void ciEnv::record_member(Thread* thread, oop member) {
1408   assert(java_lang_invoke_MemberName::is_instance(member), "!");
1409   // Check MemberName.clazz field
1410   oop clazz = java_lang_invoke_MemberName::clazz(member);
1411   if (clazz->klass()->is_instance_klass()) {
1412     RecordLocation fp(this, "clazz");
1413     InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1414     record_best_dyno_loc(ik);
1415   }
1416   // Check MemberName.method.vmtarget field
1417   Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1418   if (vmtarget != nullptr) {
1419     RecordLocation fp2(this, "<vmtarget>");
1420     InstanceKlass* ik = vmtarget->method_holder();
1421     record_best_dyno_loc(ik);
1422   }
1423 }
1424 
1425 // Read an object field.  Lookup is done by name only.
1426 static inline oop obj_field(oop obj, const char* name) {
1427     return ciReplay::obj_field(obj, name);
1428 }
1429 
1430 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1431 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1432   assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1433 
1434   {
1435     // Check LambdaForm.vmentry field
1436     oop member = java_lang_invoke_LambdaForm::vmentry(form);
1437     RecordLocation fp0(this, "vmentry");
1438     record_member(thread, member);
1439   }
1440 
1441   // Check LambdaForm.names array
1442   objArrayOop names = (objArrayOop)obj_field(form, "names");
1443   if (names != nullptr) {
1444     RecordLocation lp0(this, "names");
1445     int len = names->length();
1446     for (int i = 0; i < len; ++i) {
1447       oop name = names->obj_at(i);
1448       RecordLocation lp1(this, "%d", i);
1449      // Check LambdaForm.names[i].function field
1450       RecordLocation lp2(this, "function");
1451       oop function = obj_field(name, "function");
1452       if (function != nullptr) {
1453         // Check LambdaForm.names[i].function.member field
1454         oop member = obj_field(function, "member");
1455         if (member != nullptr) {
1456           RecordLocation lp3(this, "member");
1457           record_member(thread, member);
1458         }
1459         // Check LambdaForm.names[i].function.resolvedHandle field
1460         oop mh = obj_field(function, "resolvedHandle");
1461         if (mh != nullptr) {
1462           RecordLocation lp3(this, "resolvedHandle");
1463           record_mh(thread, mh);
1464         }
1465         // Check LambdaForm.names[i].function.invoker field
1466         oop invoker = obj_field(function, "invoker");
1467         if (invoker != nullptr) {
1468           RecordLocation lp3(this, "invoker");
1469           record_mh(thread, invoker);
1470         }
1471       }
1472     }
1473   }
1474 }
1475 
1476 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1477 void ciEnv::record_mh(Thread* thread, oop mh) {
1478   {
1479     // Check MethodHandle.form field
1480     oop form = java_lang_invoke_MethodHandle::form(mh);
1481     RecordLocation fp(this, "form");
1482     record_lambdaform(thread, form);
1483   }
1484   // Check DirectMethodHandle.member field
1485   if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1486     oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1487     RecordLocation fp(this, "member");
1488     record_member(thread, member);
1489   } else {
1490     // Check <MethodHandle subclass>.argL<n> fields
1491     // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1492     char arg_name[] = "argLXX";
1493     int max_arg = 99;
1494     for (int index = 0; index <= max_arg; ++index) {
1495       jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1496       oop arg = obj_field(mh, arg_name);
1497       if (arg != nullptr) {
1498         RecordLocation fp(this, "%s", arg_name);
1499         if (arg->klass()->is_instance_klass()) {
1500           InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1501           record_best_dyno_loc(ik2);
1502           record_call_site_obj(thread, arg);
1503         }
1504       } else {
1505         break;
1506       }
1507     }
1508   }
1509 }
1510 
1511 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1512 // Types currently supported are MethodHandle and CallSite.
1513 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1514 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1515 {
1516   if (obj != nullptr) {
1517     if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1518         record_mh(thread, obj);
1519     } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1520       oop target = java_lang_invoke_CallSite::target(obj);
1521       if (target->klass()->is_instance_klass()) {
1522         RecordLocation fp(this, "target");
1523         InstanceKlass* ik = InstanceKlass::cast(target->klass());
1524         record_best_dyno_loc(ik);
1525       }
1526     }
1527   }
1528 }
1529 
1530 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1531 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1532   InstanceKlass* holder = adapter->method_holder();
1533   if (!holder->is_hidden()) {
1534     return;
1535   }
1536   RecordLocation fp(this, "<adapter>");
1537   record_best_dyno_loc(holder);
1538 }
1539 
1540 // Process an invokedynamic call site and record any dynamic locations.
1541 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1542   int index = cp->decode_invokedynamic_index(indy_index);
1543   ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(index);
1544   if (indy_info->method() != nullptr) {
1545     // process the adapter
1546     Method* adapter = indy_info->method();
1547     record_call_site_method(thread, adapter);
1548     // process the appendix
1549     oop appendix = cp->resolved_reference_from_indy(index);
1550     {
1551       RecordLocation fp(this, "<appendix>");
1552       record_call_site_obj(thread, appendix);
1553     }
1554     // process the BSM
1555     int pool_index = indy_info->constant_pool_index();
1556     BootstrapInfo bootstrap_specifier(cp, pool_index, index);
1557     oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1558     {
1559       RecordLocation fp(this, "<bsm>");
1560       record_call_site_obj(thread, bsm);
1561     }
1562   }
1563 }
1564 
1565 // Process an invokehandle call site and record any dynamic locations.
1566 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1567   const int holder_index = cp->klass_ref_index_at(index);
1568   if (!cp->tag_at(holder_index).is_klass()) {
1569     return;  // not resolved
1570   }
1571   Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1572   Symbol* name = cp->name_ref_at(index);
1573   if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1574     ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
1575     if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) {
1576       // process the adapter
1577       Method* adapter = cp_cache_entry->f1_as_method();
1578       oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1579       record_call_site_method(thread, adapter);
1580       // process the appendix
1581       {
1582         RecordLocation fp(this, "<appendix>");
1583         record_call_site_obj(thread, appendix);
1584       }
1585     }
1586   }
1587 }
1588 
1589 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1590 // constant pool entries and record for future lookup.
1591 void ciEnv::find_dynamic_call_sites() {
1592   _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1593   _dyno_locs    = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1594 
1595   // Iterate over the class hierarchy
1596   for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1597     Klass* sub = iter.klass();
1598     if (sub->is_instance_klass()) {
1599       InstanceKlass *isub = InstanceKlass::cast(sub);
1600       InstanceKlass* ik = isub;
1601       if (!ik->is_linked()) {
1602         continue;
1603       }
1604       if (ik->is_hidden()) {
1605         continue;
1606       }
1607       JavaThread* thread = JavaThread::current();
1608       const constantPoolHandle pool(thread, ik->constants());
1609 
1610       // Look for invokedynamic/invokehandle call sites
1611       for (int i = 0; i < ik->methods()->length(); ++i) {
1612         Method* m = ik->methods()->at(i);
1613 
1614         BytecodeStream bcs(methodHandle(thread, m));
1615         while (!bcs.is_last_bytecode()) {
1616           Bytecodes::Code opcode = bcs.next();
1617           opcode = bcs.raw_code();
1618           switch (opcode) {
1619           case Bytecodes::_invokedynamic:
1620           case Bytecodes::_invokehandle: {
1621             RecordLocation fp(this, "@bci %s %s %s %d",
1622                          ik->name()->as_quoted_ascii(),
1623                          m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1624                          bcs.bci());
1625             if (opcode == Bytecodes::_invokedynamic) {
1626               int index = bcs.get_index_u4();
1627               process_invokedynamic(pool, index, thread);
1628             } else {
1629               assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1630               int cp_cache_index = bcs.get_index_u2_cpcache();
1631               process_invokehandle(pool, cp_cache_index, thread);
1632             }
1633             break;
1634           }
1635           default:
1636             break;
1637           }
1638         }
1639       }
1640 
1641       // Look for MethodHandle constant pool entries
1642       RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1643       int len = pool->length();
1644       for (int i = 0; i < len; ++i) {
1645         if (pool->tag_at(i).is_method_handle()) {
1646           bool found_it;
1647           oop mh = pool->find_cached_constant_at(i, found_it, thread);
1648           if (mh != nullptr) {
1649             RecordLocation fp(this, "%d", i);
1650             record_mh(thread, mh);
1651           }
1652         }
1653       }
1654     }
1655   }
1656 }
1657 
1658 void ciEnv::dump_compile_data(outputStream* out) {
1659   CompileTask* task = this->task();
1660   if (task) {
1661 #ifdef COMPILER2
1662     if (ReplayReduce && compiler_data() != nullptr) {
1663       // Dump C2 "reduced" inlining data.
1664       ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1665     }
1666 #endif
1667     Method* method = task->method();
1668     int entry_bci = task->osr_bci();
1669     int comp_level = task->comp_level();
1670     out->print("compile ");
1671     get_method(method)->dump_name_as_ascii(out);
1672     out->print(" %d %d", entry_bci, comp_level);
1673     if (compiler_data() != nullptr) {
1674       if (is_c2_compile(comp_level)) {
1675 #ifdef COMPILER2
1676         // Dump C2 inlining data.
1677         ((Compile*)compiler_data())->dump_inline_data(out);
1678 #endif
1679       } else if (is_c1_compile(comp_level)) {
1680 #ifdef COMPILER1
1681         // Dump C1 inlining data.
1682         ((Compilation*)compiler_data())->dump_inline_data(out);
1683 #endif
1684       }
1685     }
1686     out->cr();
1687   }
1688 }
1689 
1690 // Called from VM error reporter, so be careful.
1691 // Don't safepoint or acquire any locks.
1692 //
1693 void ciEnv::dump_replay_data_helper(outputStream* out) {
1694   NoSafepointVerifier no_safepoint;
1695   ResourceMark rm;
1696 
1697   out->print_cr("version %d", REPLAY_VERSION);
1698 #if INCLUDE_JVMTI
1699   out->print_cr("JvmtiExport can_access_local_variables %d",     _jvmti_can_access_local_variables);
1700   out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1701   out->print_cr("JvmtiExport can_post_on_exceptions %d",         _jvmti_can_post_on_exceptions);
1702 #endif // INCLUDE_JVMTI
1703 
1704   find_dynamic_call_sites();
1705 
1706   GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1707   out->print_cr("# %d ciObject found", objects->length());
1708 
1709   // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1710   // protection domain to load subsequent classes during replay compilation.
1711   ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1712 
1713   for (int i = 0; i < objects->length(); i++) {
1714     objects->at(i)->dump_replay_data(out);
1715   }
1716   dump_compile_data(out);
1717   out->flush();
1718 }
1719 
1720 // Called from VM error reporter, so be careful.
1721 // Don't safepoint or acquire any locks.
1722 //
1723 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1724   GUARDED_VM_ENTRY(
1725     dump_replay_data_helper(out);
1726   )
1727 }
1728 
1729 void ciEnv::dump_replay_data(outputStream* out) {
1730   GUARDED_VM_ENTRY(
1731     MutexLocker ml(Compile_lock);
1732     dump_replay_data_helper(out);
1733   )
1734 }
1735 
1736 void ciEnv::dump_replay_data(int compile_id) {
1737   char buffer[64];
1738   int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1739   if (ret > 0) {
1740     int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1741     if (fd != -1) {
1742       FILE* replay_data_file = os::fdopen(fd, "w");
1743       if (replay_data_file != nullptr) {
1744         fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1745         dump_replay_data(&replay_data_stream);
1746         tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1747       } else {
1748         tty->print_cr("# Can't open file to dump replay data.");
1749       }
1750     }
1751   }
1752 }
1753 
1754 void ciEnv::dump_inline_data(int compile_id) {
1755   char buffer[64];
1756   int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1757   if (ret > 0) {
1758     int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1759     if (fd != -1) {
1760       FILE* inline_data_file = os::fdopen(fd, "w");
1761       if (inline_data_file != nullptr) {
1762         fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1763         GUARDED_VM_ENTRY(
1764           MutexLocker ml(Compile_lock);
1765           dump_compile_data(&replay_data_stream);
1766         )
1767         replay_data_stream.flush();
1768         tty->print("# Compiler inline data is saved as: ");
1769         tty->print_cr("%s", buffer);
1770       } else {
1771         tty->print_cr("# Can't open file to dump inline data.");
1772       }
1773     }
1774   }
1775 }