1 /*
   2  * Copyright (c) 1997, 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 "classfile/javaClasses.inline.hpp"
  27 #include "classfile/symbolTable.hpp"
  28 #include "classfile/systemDictionary.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/codeCache.hpp"
  31 #include "compiler/compileBroker.hpp"
  32 #include "compiler/disassembler.hpp"
  33 #include "gc/shared/barrierSetNMethod.hpp"
  34 #include "gc/shared/collectedHeap.hpp"
  35 #include "interpreter/interpreter.hpp"
  36 #include "interpreter/interpreterRuntime.hpp"
  37 #include "interpreter/linkResolver.hpp"
  38 #include "interpreter/templateTable.hpp"
  39 #include "logging/log.hpp"
  40 #include "memory/oopFactory.hpp"
  41 #include "memory/resourceArea.hpp"
  42 #include "memory/universe.hpp"
  43 #include "oops/constantPool.hpp"
  44 #include "oops/cpCache.inline.hpp"
  45 #include "oops/instanceKlass.hpp"
  46 #include "oops/methodData.hpp"
  47 #include "oops/objArrayKlass.hpp"
  48 #include "oops/objArrayOop.inline.hpp"
  49 #include "oops/oop.inline.hpp"
  50 #include "oops/symbol.hpp"
  51 #include "prims/jvmtiExport.hpp"
  52 #include "prims/nativeLookup.hpp"
  53 #include "runtime/atomic.hpp"
  54 #include "runtime/biasedLocking.hpp"
  55 #include "runtime/compilationPolicy.hpp"
  56 #include "runtime/continuation.hpp"
  57 #include "runtime/deoptimization.hpp"
  58 #include "runtime/fieldDescriptor.inline.hpp"
  59 #include "runtime/frame.inline.hpp"
  60 #include "runtime/handles.inline.hpp"
  61 #include "runtime/icache.hpp"
  62 #include "runtime/interfaceSupport.inline.hpp"
  63 #include "runtime/java.hpp"
  64 #include "runtime/javaCalls.hpp"
  65 #include "runtime/jfieldIDWorkaround.hpp"
  66 #include "runtime/osThread.hpp"
  67 #include "runtime/sharedRuntime.hpp"
  68 #include "runtime/stubRoutines.hpp"
  69 #include "runtime/synchronizer.hpp"
  70 #include "runtime/threadCritical.hpp"
  71 #include "utilities/align.hpp"
  72 #include "utilities/copy.hpp"
  73 #include "utilities/events.hpp"
  74 #ifdef COMPILER2
  75 #include "opto/runtime.hpp"
  76 #endif
  77 
  78 class UnlockFlagSaver {
  79   private:
  80     JavaThread* _thread;
  81     bool _do_not_unlock;
  82   public:
  83     UnlockFlagSaver(JavaThread* t) {
  84       _thread = t;
  85       _do_not_unlock = t->do_not_unlock_if_synchronized();
  86       t->set_do_not_unlock_if_synchronized(false);
  87     }
  88     ~UnlockFlagSaver() {
  89       _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
  90     }
  91 };
  92 
  93 // Helper class to access current interpreter state
  94 class LastFrameAccessor : public StackObj {
  95   frame _last_frame;
  96 public:
  97   LastFrameAccessor(JavaThread* thread) {
  98     assert(thread == Thread::current(), "sanity");
  99     _last_frame = thread->last_frame();
 100   }
 101   bool is_interpreted_frame() const              { return _last_frame.is_interpreted_frame(); }
 102   Method*   method() const                       { return _last_frame.interpreter_frame_method(); }
 103   address   bcp() const                          { return _last_frame.interpreter_frame_bcp(); }
 104   int       bci() const                          { return _last_frame.interpreter_frame_bci(); }
 105   address   mdp() const                          { return _last_frame.interpreter_frame_mdp(); }
 106 
 107   void      set_bcp(address bcp)                 { _last_frame.interpreter_frame_set_bcp(bcp); }
 108   void      set_mdp(address dp)                  { _last_frame.interpreter_frame_set_mdp(dp); }
 109 
 110   // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
 111   Bytecodes::Code code() const                   { return Bytecodes::code_at(method(), bcp()); }
 112 
 113   Bytecode  bytecode() const                     { return Bytecode(method(), bcp()); }
 114   int get_index_u1(Bytecodes::Code bc) const     { return bytecode().get_index_u1(bc); }
 115   int get_index_u2(Bytecodes::Code bc) const     { return bytecode().get_index_u2(bc); }
 116   int get_index_u2_cpcache(Bytecodes::Code bc) const
 117                                                  { return bytecode().get_index_u2_cpcache(bc); }
 118   int get_index_u4(Bytecodes::Code bc) const     { return bytecode().get_index_u4(bc); }
 119   int number_of_dimensions() const               { return bcp()[3]; }
 120   ConstantPoolCacheEntry* cache_entry_at(int i) const
 121                                                  { return method()->constants()->cache()->entry_at(i); }
 122   ConstantPoolCacheEntry* cache_entry() const    { return cache_entry_at(Bytes::get_native_u2(bcp() + 1)); }
 123 
 124   oop callee_receiver(Symbol* signature) {
 125     return _last_frame.interpreter_callee_receiver(signature);
 126   }
 127   BasicObjectLock* monitor_begin() const {
 128     return _last_frame.interpreter_frame_monitor_begin();
 129   }
 130   BasicObjectLock* monitor_end() const {
 131     return _last_frame.interpreter_frame_monitor_end();
 132   }
 133   BasicObjectLock* next_monitor(BasicObjectLock* current) const {
 134     return _last_frame.next_monitor_in_interpreter_frame(current);
 135   }
 136 
 137   frame& get_frame()                             { return _last_frame; }
 138 };
 139 
 140 //------------------------------------------------------------------------------------------------------------------------
 141 // State accessors
 142 
 143 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
 144   LastFrameAccessor last_frame(thread);
 145   last_frame.set_bcp(bcp);
 146   if (ProfileInterpreter) {
 147     // ProfileTraps uses MDOs independently of ProfileInterpreter.
 148     // That is why we must check both ProfileInterpreter and mdo != NULL.
 149     MethodData* mdo = last_frame.method()->method_data();
 150     if (mdo != NULL) {
 151       NEEDS_CLEANUP;
 152       last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
 153     }
 154   }
 155 }
 156 
 157 //------------------------------------------------------------------------------------------------------------------------
 158 // Constants
 159 
 160 
 161 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
 162   // access constant pool
 163   LastFrameAccessor last_frame(thread);
 164   ConstantPool* pool = last_frame.method()->constants();
 165   int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
 166   constantTag tag = pool->tag_at(index);
 167 
 168   assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
 169   Klass* klass = pool->klass_at(index, CHECK);
 170     oop java_class = klass->java_mirror();
 171     thread->set_vm_result(java_class);
 172 JRT_END
 173 
 174 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
 175   assert(bytecode == Bytecodes::_ldc ||
 176          bytecode == Bytecodes::_ldc_w ||
 177          bytecode == Bytecodes::_ldc2_w ||
 178          bytecode == Bytecodes::_fast_aldc ||
 179          bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
 180   ResourceMark rm(thread);
 181   const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
 182                              bytecode == Bytecodes::_fast_aldc_w);
 183   LastFrameAccessor last_frame(thread);
 184   methodHandle m (thread, last_frame.method());
 185   Bytecode_loadconstant ldc(m, last_frame.bci());
 186 
 187   // Double-check the size.  (Condy can have any type.)
 188   BasicType type = ldc.result_type();
 189   switch (type2size[type]) {
 190   case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
 191   case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
 192   default: ShouldNotReachHere();
 193   }
 194 
 195   // Resolve the constant.  This does not do unboxing.
 196   // But it does replace Universe::the_null_sentinel by null.
 197   oop result = ldc.resolve_constant(CHECK);
 198   assert(result != NULL || is_fast_aldc, "null result only valid for fast_aldc");
 199 
 200 #ifdef ASSERT
 201   {
 202     // The bytecode wrappers aren't GC-safe so construct a new one
 203     Bytecode_loadconstant ldc2(m, last_frame.bci());
 204     int rindex = ldc2.cache_index();
 205     if (rindex < 0)
 206       rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
 207     if (rindex >= 0) {
 208       oop coop = m->constants()->resolved_references()->obj_at(rindex);
 209       oop roop = (result == NULL ? Universe::the_null_sentinel() : result);
 210       assert(oopDesc::equals(roop, coop), "expected result for assembly code");
 211     }
 212   }
 213 #endif
 214   thread->set_vm_result(result);
 215   if (!is_fast_aldc) {
 216     // Tell the interpreter how to unbox the primitive.
 217     guarantee(java_lang_boxing_object::is_instance(result, type), "");
 218     int offset = java_lang_boxing_object::value_offset_in_bytes(type);
 219     intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
 220                       | (offset & ConstantPoolCacheEntry::field_index_mask));
 221     thread->set_vm_result_2((Metadata*)flags);
 222   }
 223 }
 224 JRT_END
 225 
 226 
 227 //------------------------------------------------------------------------------------------------------------------------
 228 // Allocation
 229 
 230 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
 231   Klass* k = pool->klass_at(index, CHECK);
 232   InstanceKlass* klass = InstanceKlass::cast(k);
 233 
 234   // Make sure we are not instantiating an abstract klass
 235   klass->check_valid_for_instantiation(true, CHECK);
 236 
 237   // Make sure klass is initialized
 238   klass->initialize(CHECK);
 239 
 240   // At this point the class may not be fully initialized
 241   // because of recursive initialization. If it is fully
 242   // initialized & has_finalized is not set, we rewrite
 243   // it into its fast version (Note: no locking is needed
 244   // here since this is an atomic byte write and can be
 245   // done more than once).
 246   //
 247   // Note: In case of classes with has_finalized we don't
 248   //       rewrite since that saves us an extra check in
 249   //       the fast version which then would call the
 250   //       slow version anyway (and do a call back into
 251   //       Java).
 252   //       If we have a breakpoint, then we don't rewrite
 253   //       because the _breakpoint bytecode would be lost.
 254   oop obj = klass->allocate_instance(CHECK);
 255   thread->set_vm_result(obj);
 256 JRT_END
 257 
 258 
 259 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
 260   oop obj = oopFactory::new_typeArray(type, size, CHECK);
 261   thread->set_vm_result(obj);
 262 JRT_END
 263 
 264 
 265 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
 266   Klass*    klass = pool->klass_at(index, CHECK);
 267   objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
 268   thread->set_vm_result(obj);
 269 JRT_END
 270 
 271 
 272 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
 273   // We may want to pass in more arguments - could make this slightly faster
 274   LastFrameAccessor last_frame(thread);
 275   ConstantPool* constants = last_frame.method()->constants();
 276   int          i = last_frame.get_index_u2(Bytecodes::_multianewarray);
 277   Klass* klass   = constants->klass_at(i, CHECK);
 278   int   nof_dims = last_frame.number_of_dimensions();
 279   assert(klass->is_klass(), "not a class");
 280   assert(nof_dims >= 1, "multianewarray rank must be nonzero");
 281 
 282   // We must create an array of jints to pass to multi_allocate.
 283   ResourceMark rm(thread);
 284   const int small_dims = 10;
 285   jint dim_array[small_dims];
 286   jint *dims = &dim_array[0];
 287   if (nof_dims > small_dims) {
 288     dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
 289   }
 290   for (int index = 0; index < nof_dims; index++) {
 291     // offset from first_size_address is addressed as local[index]
 292     int n = Interpreter::local_offset_in_bytes(index)/jintSize;
 293     dims[index] = first_size_address[n];
 294   }
 295   oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
 296   thread->set_vm_result(obj);
 297 JRT_END
 298 
 299 
 300 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
 301   assert(oopDesc::is_oop(obj), "must be a valid oop");
 302   assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
 303   InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
 304 JRT_END
 305 
 306 
 307 // Quicken instance-of and check-cast bytecodes
 308 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
 309   // Force resolving; quicken the bytecode
 310   LastFrameAccessor last_frame(thread);
 311   int which = last_frame.get_index_u2(Bytecodes::_checkcast);
 312   ConstantPool* cpool = last_frame.method()->constants();
 313   // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
 314   // program we might have seen an unquick'd bytecode in the interpreter but have another
 315   // thread quicken the bytecode before we get here.
 316   // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
 317   Klass* klass = cpool->klass_at(which, CHECK);
 318   thread->set_vm_result_2(klass);
 319 JRT_END
 320 
 321 
 322 //------------------------------------------------------------------------------------------------------------------------
 323 // Exceptions
 324 
 325 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
 326                                          const methodHandle& trap_method, int trap_bci, TRAPS) {
 327   if (trap_method.not_null()) {
 328     MethodData* trap_mdo = trap_method->method_data();
 329     if (trap_mdo == NULL) {
 330       Method::build_interpreter_method_data(trap_method, THREAD);
 331       if (HAS_PENDING_EXCEPTION) {
 332         assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
 333                "we expect only an OOM error here");
 334         CLEAR_PENDING_EXCEPTION;
 335       }
 336       trap_mdo = trap_method->method_data();
 337       // and fall through...
 338     }
 339     if (trap_mdo != NULL) {
 340       // Update per-method count of trap events.  The interpreter
 341       // is updating the MDO to simulate the effect of compiler traps.
 342       Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
 343     }
 344   }
 345 }
 346 
 347 // Assume the compiler is (or will be) interested in this event.
 348 // If necessary, create an MDO to hold the information, and record it.
 349 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
 350   assert(ProfileTraps, "call me only if profiling");
 351   LastFrameAccessor last_frame(thread);
 352   methodHandle trap_method(thread, last_frame.method());
 353   int trap_bci = trap_method->bci_from(last_frame.bcp());
 354   note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
 355 }
 356 
 357 #ifdef CC_INTERP
 358 // As legacy note_trap, but we have more arguments.
 359 JRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
 360   methodHandle trap_method(method);
 361   note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
 362 JRT_END
 363 
 364 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
 365 // for each exception.
 366 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
 367   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
 368 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
 369   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
 370 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
 371   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
 372 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
 373   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
 374 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
 375   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
 376 #endif // CC_INTERP
 377 
 378 
 379 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
 380   // get klass
 381   InstanceKlass* klass = InstanceKlass::cast(k);
 382   assert(klass->is_initialized(),
 383          "this klass should have been initialized during VM initialization");
 384   // create instance - do not call constructor since we may have no
 385   // (java) stack space left (should assert constructor is empty)
 386   Handle exception;
 387   oop exception_oop = klass->allocate_instance(CHECK_(exception));
 388   exception = Handle(THREAD, exception_oop);
 389   if (StackTraceInThrowable) {
 390     java_lang_Throwable::fill_in_stack_trace(exception);
 391   }
 392   return exception;
 393 }
 394 
 395 // Special handling for stack overflow: since we don't have any (java) stack
 396 // space left we use the pre-allocated & pre-initialized StackOverflowError
 397 // klass to create an stack overflow error instance.  We do not call its
 398 // constructor for the same reason (it is empty, anyway).
 399 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
 400   Handle exception = get_preinitialized_exception(
 401                                  SystemDictionary::StackOverflowError_klass(),
 402                                  CHECK);
 403   // Increment counter for hs_err file reporting
 404   Atomic::inc(&Exceptions::_stack_overflow_errors);
 405   THROW_HANDLE(exception);
 406 JRT_END
 407 
 408 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
 409   Handle exception = get_preinitialized_exception(
 410                                  SystemDictionary::StackOverflowError_klass(),
 411                                  CHECK);
 412   java_lang_Throwable::set_message(exception(),
 413           Universe::delayed_stack_overflow_error_message());
 414   // Increment counter for hs_err file reporting
 415   Atomic::inc(&Exceptions::_stack_overflow_errors);
 416   THROW_HANDLE(exception);
 417 JRT_END
 418 
 419 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
 420   // lookup exception klass
 421   TempNewSymbol s = SymbolTable::new_symbol(name);
 422   if (ProfileTraps) {
 423     if (s == vmSymbols::java_lang_ArithmeticException()) {
 424       note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
 425     } else if (s == vmSymbols::java_lang_NullPointerException()) {
 426       note_trap(thread, Deoptimization::Reason_null_check, CHECK);
 427     }
 428   }
 429   // create exception
 430   Handle exception = Exceptions::new_exception(thread, s, message);
 431   thread->set_vm_result(exception());
 432 JRT_END
 433 
 434 
 435 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
 436   // Produce the error message first because note_trap can safepoint
 437   ResourceMark rm(thread);
 438   const char* klass_name = obj->klass()->external_name();
 439   // lookup exception klass
 440   TempNewSymbol s = SymbolTable::new_symbol(name);
 441   if (ProfileTraps) {
 442     note_trap(thread, Deoptimization::Reason_class_check, CHECK);
 443   }
 444   // create exception, with klass name as detail message
 445   Handle exception = Exceptions::new_exception(thread, s, klass_name);
 446   thread->set_vm_result(exception());
 447 JRT_END
 448 
 449 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, arrayOopDesc* a, jint index))
 450   // Produce the error message first because note_trap can safepoint
 451   ResourceMark rm(thread);
 452   stringStream ss;
 453   ss.print("Index %d out of bounds for length %d", index, a->length());
 454 
 455   if (ProfileTraps) {
 456     note_trap(thread, Deoptimization::Reason_range_check, CHECK);
 457   }
 458 
 459   THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
 460 JRT_END
 461 
 462 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
 463   JavaThread* thread, oopDesc* obj))
 464 
 465   // Produce the error message first because note_trap can safepoint
 466   ResourceMark rm(thread);
 467   char* message = SharedRuntime::generate_class_cast_message(
 468     thread, obj->klass());
 469 
 470   if (ProfileTraps) {
 471     note_trap(thread, Deoptimization::Reason_class_check, CHECK);
 472   }
 473 
 474   // create exception
 475   THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
 476 JRT_END
 477 
 478 // exception_handler_for_exception(...) returns the continuation address,
 479 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
 480 // The exception oop is returned to make sure it is preserved over GC (it
 481 // is only on the stack if the exception was thrown explicitly via athrow).
 482 // During this operation, the expression stack contains the values for the
 483 // bci where the exception happened. If the exception was propagated back
 484 // from a call, the expression stack contains the values for the bci at the
 485 // invoke w/o arguments (i.e., as if one were inside the call).
 486 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
 487 
 488   LastFrameAccessor last_frame(thread);
 489   Handle             h_exception(thread, exception);
 490   methodHandle       h_method   (thread, last_frame.method());
 491   constantPoolHandle h_constants(thread, h_method->constants());
 492   bool               should_repeat;
 493   int                handler_bci;
 494   int                current_bci = last_frame.bci();
 495 
 496   if (thread->frames_to_pop_failed_realloc() > 0) {
 497     // Allocation of scalar replaced object used in this frame
 498     // failed. Unconditionally pop the frame.
 499     thread->dec_frames_to_pop_failed_realloc();
 500     thread->set_vm_result(h_exception());
 501     // If the method is synchronized we already unlocked the monitor
 502     // during deoptimization so the interpreter needs to skip it when
 503     // the frame is popped.
 504     thread->set_do_not_unlock_if_synchronized(true);
 505 #ifdef CC_INTERP
 506     return (address) -1;
 507 #else
 508     return Interpreter::remove_activation_entry();
 509 #endif
 510   }
 511 
 512   // Need to do this check first since when _do_not_unlock_if_synchronized
 513   // is set, we don't want to trigger any classloading which may make calls
 514   // into java, or surprisingly find a matching exception handler for bci 0
 515   // since at this moment the method hasn't been "officially" entered yet.
 516   if (thread->do_not_unlock_if_synchronized()) {
 517     ResourceMark rm;
 518     assert(current_bci == 0,  "bci isn't zero for do_not_unlock_if_synchronized");
 519     thread->set_vm_result(exception);
 520 #ifdef CC_INTERP
 521     return (address) -1;
 522 #else
 523     return Interpreter::remove_activation_entry();
 524 #endif
 525   }
 526 
 527   do {
 528     should_repeat = false;
 529 
 530     // assertions
 531 #ifdef ASSERT
 532     assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
 533     // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
 534     if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
 535       if (ExitVMOnVerifyError) vm_exit(-1);
 536       ShouldNotReachHere();
 537     }
 538 #endif
 539 
 540     // tracing
 541     if (log_is_enabled(Info, exceptions)) {
 542       ResourceMark rm(thread);
 543       stringStream tempst;
 544       tempst.print("interpreter method <%s>\n"
 545                    " at bci %d for thread " INTPTR_FORMAT " (%s)",
 546                    h_method->print_value_string(), current_bci, p2i(thread), thread->name());
 547       Exceptions::log_exception(h_exception, tempst.as_string());
 548     }
 549 // Don't go paging in something which won't be used.
 550 //     else if (extable->length() == 0) {
 551 //       // disabled for now - interpreter is not using shortcut yet
 552 //       // (shortcut is not to call runtime if we have no exception handlers)
 553 //       // warning("performance bug: should not call runtime if method has no exception handlers");
 554 //     }
 555     // for AbortVMOnException flag
 556     Exceptions::debug_check_abort(h_exception);
 557 
 558     // exception handler lookup
 559     Klass* klass = h_exception->klass();
 560     handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
 561     if (HAS_PENDING_EXCEPTION) {
 562       // We threw an exception while trying to find the exception handler.
 563       // Transfer the new exception to the exception handle which will
 564       // be set into thread local storage, and do another lookup for an
 565       // exception handler for this exception, this time starting at the
 566       // BCI of the exception handler which caused the exception to be
 567       // thrown (bug 4307310).
 568       h_exception = Handle(THREAD, PENDING_EXCEPTION);
 569       CLEAR_PENDING_EXCEPTION;
 570       if (handler_bci >= 0) {
 571         current_bci = handler_bci;
 572         should_repeat = true;
 573       }
 574     }
 575   } while (should_repeat == true);
 576 
 577 #if INCLUDE_JVMCI
 578   if (EnableJVMCI && h_method->method_data() != NULL) {
 579     ResourceMark rm(thread);
 580     ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
 581     if (pdata != NULL && pdata->is_BitData()) {
 582       BitData* bit_data = (BitData*) pdata;
 583       bit_data->set_exception_seen();
 584     }
 585   }
 586 #endif
 587 
 588   // notify JVMTI of an exception throw; JVMTI will detect if this is a first
 589   // time throw or a stack unwinding throw and accordingly notify the debugger
 590   if (JvmtiExport::can_post_on_exceptions()) {
 591     JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
 592   }
 593 
 594 #ifdef CC_INTERP
 595   address continuation = (address)(intptr_t) handler_bci;
 596 #else
 597   address continuation = NULL;
 598 #endif
 599   address handler_pc = NULL;
 600   if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
 601     // Forward exception to callee (leaving bci/bcp untouched) because (a) no
 602     // handler in this method, or (b) after a stack overflow there is not yet
 603     // enough stack space available to reprotect the stack.
 604 #ifndef CC_INTERP
 605     continuation = Interpreter::remove_activation_entry();
 606 #endif
 607 #if COMPILER2_OR_JVMCI
 608     // Count this for compilation purposes
 609     h_method->interpreter_throwout_increment(THREAD);
 610 #endif
 611   } else {
 612     // handler in this method => change bci/bcp to handler bci/bcp and continue there
 613     handler_pc = h_method->code_base() + handler_bci;
 614 #ifndef CC_INTERP
 615     set_bcp_and_mdp(handler_pc, thread);
 616     continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
 617 #endif
 618   }
 619   // notify debugger of an exception catch
 620   // (this is good for exceptions caught in native methods as well)
 621   if (JvmtiExport::can_post_on_exceptions()) {
 622     JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
 623   }
 624 
 625   thread->set_vm_result(h_exception());
 626   return continuation;
 627 JRT_END
 628 
 629 
 630 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
 631   assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
 632   // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
 633 JRT_END
 634 
 635 
 636 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
 637   THROW(vmSymbols::java_lang_AbstractMethodError());
 638 JRT_END
 639 
 640 // This method is called from the "abstract_entry" of the interpreter.
 641 // At that point, the arguments have already been removed from the stack
 642 // and therefore we don't have the receiver object at our fingertips. (Though,
 643 // on some platforms the receiver still resides in a register...). Thus,
 644 // we have no choice but print an error message not containing the receiver
 645 // type.
 646 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* thread,
 647                                                                         Method* missingMethod))
 648   ResourceMark rm(thread);
 649   assert(missingMethod != NULL, "sanity");
 650   methodHandle m(thread, missingMethod);
 651   LinkResolver::throw_abstract_method_error(m, THREAD);
 652 JRT_END
 653 
 654 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* thread,
 655                                                                      Klass* recvKlass,
 656                                                                      Method* missingMethod))
 657   ResourceMark rm(thread);
 658   methodHandle mh = methodHandle(thread, missingMethod);
 659   LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
 660 JRT_END
 661 
 662 
 663 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
 664   THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
 665 JRT_END
 666 
 667 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* thread,
 668                                                                               Klass* recvKlass,
 669                                                                               Klass* interfaceKlass))
 670   ResourceMark rm(thread);
 671   char buf[1000];
 672   buf[0] = '\0';
 673   jio_snprintf(buf, sizeof(buf),
 674                "Class %s does not implement the requested interface %s",
 675                recvKlass ? recvKlass->external_name() : "NULL",
 676                interfaceKlass ? interfaceKlass->external_name() : "NULL");
 677   THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 678 JRT_END
 679 
 680 //------------------------------------------------------------------------------------------------------------------------
 681 // Fields
 682 //
 683 
 684 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
 685   Thread* THREAD = thread;
 686   // resolve field
 687   fieldDescriptor info;
 688   LastFrameAccessor last_frame(thread);
 689   constantPoolHandle pool(thread, last_frame.method()->constants());
 690   methodHandle m(thread, last_frame.method());
 691   bool is_put    = (bytecode == Bytecodes::_putfield  || bytecode == Bytecodes::_nofast_putfield ||
 692                     bytecode == Bytecodes::_putstatic);
 693   bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
 694 
 695   {
 696     JvmtiHideSingleStepping jhss(thread);
 697     LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
 698                                        m, bytecode, CHECK);
 699   } // end JvmtiHideSingleStepping
 700 
 701   // check if link resolution caused cpCache to be updated
 702   ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
 703   if (cp_cache_entry->is_resolved(bytecode)) return;
 704 
 705   // compute auxiliary field attributes
 706   TosState state  = as_TosState(info.field_type());
 707 
 708   // Resolution of put instructions on final fields is delayed. That is required so that
 709   // exceptions are thrown at the correct place (when the instruction is actually invoked).
 710   // If we do not resolve an instruction in the current pass, leaving the put_code
 711   // set to zero will cause the next put instruction to the same field to reresolve.
 712 
 713   // Resolution of put instructions to final instance fields with invalid updates (i.e.,
 714   // to final instance fields with updates originating from a method different than <init>)
 715   // is inhibited. A putfield instruction targeting an instance final field must throw
 716   // an IllegalAccessError if the instruction is not in an instance
 717   // initializer method <init>. If resolution were not inhibited, a putfield
 718   // in an initializer method could be resolved in the initializer. Subsequent
 719   // putfield instructions to the same field would then use cached information.
 720   // As a result, those instructions would not pass through the VM. That is,
 721   // checks in resolve_field_access() would not be executed for those instructions
 722   // and the required IllegalAccessError would not be thrown.
 723   //
 724   // Also, we need to delay resolving getstatic and putstatic instructions until the
 725   // class is initialized.  This is required so that access to the static
 726   // field will call the initialization function every time until the class
 727   // is completely initialized ala. in 2.17.5 in JVM Specification.
 728   InstanceKlass* klass = info.field_holder();
 729   bool uninitialized_static = is_static && !klass->is_initialized();
 730   bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
 731                                       info.has_initialized_final_update();
 732   assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
 733 
 734   Bytecodes::Code get_code = (Bytecodes::Code)0;
 735   Bytecodes::Code put_code = (Bytecodes::Code)0;
 736   if (!uninitialized_static) {
 737     get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
 738     if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
 739       put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
 740     }
 741   }
 742 
 743   cp_cache_entry->set_field(
 744     get_code,
 745     put_code,
 746     info.field_holder(),
 747     info.index(),
 748     info.offset(),
 749     state,
 750     info.access_flags().is_final(),
 751     info.access_flags().is_volatile(),
 752     pool->pool_holder()
 753   );
 754 }
 755 
 756 
 757 //------------------------------------------------------------------------------------------------------------------------
 758 // Synchronization
 759 //
 760 // The interpreter's synchronization code is factored out so that it can
 761 // be shared by method invocation and synchronized blocks.
 762 //%note synchronization_3
 763 
 764 //%note monitor_1
 765 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
 766 #ifdef ASSERT
 767   thread->last_frame().interpreter_frame_verify_monitor(elem);
 768 #endif
 769   if (PrintBiasedLockingStatistics) {
 770     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
 771   }
 772   Handle h_obj(thread, elem->obj());
 773   assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
 774          "must be NULL or an object");
 775   if (UseBiasedLocking) {
 776     // Retry fast entry if bias is revoked to avoid unnecessary inflation
 777     ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
 778   } else {
 779     ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
 780   }
 781   assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
 782          "must be NULL or an object");
 783 #ifdef ASSERT
 784   thread->last_frame().interpreter_frame_verify_monitor(elem);
 785 #endif
 786 JRT_END
 787 
 788 
 789 //%note monitor_1
 790 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
 791 #ifdef ASSERT
 792   thread->last_frame().interpreter_frame_verify_monitor(elem);
 793 #endif
 794   Handle h_obj(thread, elem->obj());
 795   assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
 796          "must be NULL or an object");
 797   if (elem == NULL || h_obj()->is_unlocked()) {
 798     THROW(vmSymbols::java_lang_IllegalMonitorStateException());
 799   }
 800   ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
 801   // Free entry. This must be done here, since a pending exception might be installed on
 802   // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
 803   elem->set_obj(NULL);
 804 #ifdef ASSERT
 805   thread->last_frame().interpreter_frame_verify_monitor(elem);
 806 #endif
 807 JRT_END
 808 
 809 
 810 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
 811   THROW(vmSymbols::java_lang_IllegalMonitorStateException());
 812 JRT_END
 813 
 814 
 815 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
 816   // Returns an illegal exception to install into the current thread. The
 817   // pending_exception flag is cleared so normal exception handling does not
 818   // trigger. Any current installed exception will be overwritten. This
 819   // method will be called during an exception unwind.
 820 
 821   assert(!HAS_PENDING_EXCEPTION, "no pending exception");
 822   Handle exception(thread, thread->vm_result());
 823   assert(exception() != NULL, "vm result should be set");
 824   thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
 825   if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
 826     exception = get_preinitialized_exception(
 827                        SystemDictionary::IllegalMonitorStateException_klass(),
 828                        CATCH);
 829   }
 830   thread->set_vm_result(exception());
 831 JRT_END
 832 
 833 
 834 //------------------------------------------------------------------------------------------------------------------------
 835 // Invokes
 836 
 837 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
 838   return method->orig_bytecode_at(method->bci_from(bcp));
 839 JRT_END
 840 
 841 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
 842   method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
 843 JRT_END
 844 
 845 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
 846   JvmtiExport::post_raw_breakpoint(thread, method, bcp);
 847 JRT_END
 848 
 849 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
 850   Thread* THREAD = thread;
 851   LastFrameAccessor last_frame(thread);
 852   // extract receiver from the outgoing argument list if necessary
 853   Handle receiver(thread, NULL);
 854   if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
 855       bytecode == Bytecodes::_invokespecial) {
 856     ResourceMark rm(thread);
 857     methodHandle m (thread, last_frame.method());
 858     Bytecode_invoke call(m, last_frame.bci());
 859     Symbol* signature = call.signature();
 860     receiver = Handle(thread, last_frame.callee_receiver(signature));
 861 
 862     assert(Universe::heap()->is_in_reserved_or_null(receiver()),
 863            "sanity check");
 864     assert(receiver.is_null() ||
 865            !Universe::heap()->is_in_reserved(receiver->klass()),
 866            "sanity check");
 867   }
 868 
 869   // resolve method
 870   CallInfo info;
 871   constantPoolHandle pool(thread, last_frame.method()->constants());
 872 
 873   {
 874     JvmtiHideSingleStepping jhss(thread);
 875     LinkResolver::resolve_invoke(info, receiver, pool,
 876                                  last_frame.get_index_u2_cpcache(bytecode), bytecode,
 877                                  CHECK);
 878     if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
 879       int retry_count = 0;
 880       while (info.resolved_method()->is_old()) {
 881         // It is very unlikely that method is redefined more than 100 times
 882         // in the middle of resolve. If it is looping here more than 100 times
 883         // means then there could be a bug here.
 884         guarantee((retry_count++ < 100),
 885                   "Could not resolve to latest version of redefined method");
 886         // method is redefined in the middle of resolve so re-try.
 887         LinkResolver::resolve_invoke(info, receiver, pool,
 888                                      last_frame.get_index_u2_cpcache(bytecode), bytecode,
 889                                      CHECK);
 890       }
 891     }
 892   } // end JvmtiHideSingleStepping
 893 
 894   // check if link resolution caused cpCache to be updated
 895   ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
 896   if (cp_cache_entry->is_resolved(bytecode)) return;
 897 
 898 #ifdef ASSERT
 899   if (bytecode == Bytecodes::_invokeinterface) {
 900     if (info.resolved_method()->method_holder() ==
 901                                             SystemDictionary::Object_klass()) {
 902       // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
 903       // (see also CallInfo::set_interface for details)
 904       assert(info.call_kind() == CallInfo::vtable_call ||
 905              info.call_kind() == CallInfo::direct_call, "");
 906       methodHandle rm = info.resolved_method();
 907       assert(rm->is_final() || info.has_vtable_index(),
 908              "should have been set already");
 909     } else if (!info.resolved_method()->has_itable_index()) {
 910       // Resolved something like CharSequence.toString.  Use vtable not itable.
 911       assert(info.call_kind() != CallInfo::itable_call, "");
 912     } else {
 913       // Setup itable entry
 914       assert(info.call_kind() == CallInfo::itable_call, "");
 915       int index = info.resolved_method()->itable_index();
 916       assert(info.itable_index() == index, "");
 917     }
 918   } else if (bytecode == Bytecodes::_invokespecial) {
 919     assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
 920   } else {
 921     assert(info.call_kind() == CallInfo::direct_call ||
 922            info.call_kind() == CallInfo::vtable_call, "");
 923   }
 924 #endif
 925   // Get sender or sender's unsafe_anonymous_host, and only set cpCache entry to resolved if
 926   // it is not an interface.  The receiver for invokespecial calls within interface
 927   // methods must be checked for every call.
 928   InstanceKlass* sender = pool->pool_holder();
 929   sender = sender->is_unsafe_anonymous() ? sender->unsafe_anonymous_host() : sender;
 930 
 931   switch (info.call_kind()) {
 932   case CallInfo::direct_call:
 933     cp_cache_entry->set_direct_call(
 934       bytecode,
 935       info.resolved_method(),
 936       sender->is_interface());
 937     break;
 938   case CallInfo::vtable_call:
 939     cp_cache_entry->set_vtable_call(
 940       bytecode,
 941       info.resolved_method(),
 942       info.vtable_index());
 943     break;
 944   case CallInfo::itable_call:
 945     cp_cache_entry->set_itable_call(
 946       bytecode,
 947       info.resolved_klass(),
 948       info.resolved_method(),
 949       info.itable_index());
 950     break;
 951   default:  ShouldNotReachHere();
 952   }
 953 }
 954 
 955 
 956 // First time execution:  Resolve symbols, create a permanent MethodType object.
 957 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
 958   Thread* THREAD = thread;
 959   const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
 960   LastFrameAccessor last_frame(thread);
 961 
 962   // resolve method
 963   CallInfo info;
 964   constantPoolHandle pool(thread, last_frame.method()->constants());
 965   {
 966     JvmtiHideSingleStepping jhss(thread);
 967     LinkResolver::resolve_invoke(info, Handle(), pool,
 968                                  last_frame.get_index_u2_cpcache(bytecode), bytecode,
 969                                  CHECK);
 970   } // end JvmtiHideSingleStepping
 971 
 972   ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
 973   cp_cache_entry->set_method_handle(pool, info);
 974 }
 975 
 976 // First time execution:  Resolve symbols, create a permanent CallSite object.
 977 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
 978   Thread* THREAD = thread;
 979   LastFrameAccessor last_frame(thread);
 980   const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
 981 
 982   // resolve method
 983   CallInfo info;
 984   constantPoolHandle pool(thread, last_frame.method()->constants());
 985   int index = last_frame.get_index_u4(bytecode);
 986   {
 987     JvmtiHideSingleStepping jhss(thread);
 988     LinkResolver::resolve_invoke(info, Handle(), pool,
 989                                  index, bytecode, CHECK);
 990   } // end JvmtiHideSingleStepping
 991 
 992   ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
 993   cp_cache_entry->set_dynamic_call(pool, info);
 994 }
 995 
 996 // This function is the interface to the assembly code. It returns the resolved
 997 // cpCache entry.  This doesn't safepoint, but the helper routines safepoint.
 998 // This function will check for redefinition!
 999 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
1000   switch (bytecode) {
1001   case Bytecodes::_getstatic:
1002   case Bytecodes::_putstatic:
1003   case Bytecodes::_getfield:
1004   case Bytecodes::_putfield:
1005     resolve_get_put(thread, bytecode);
1006     break;
1007   case Bytecodes::_invokevirtual:
1008   case Bytecodes::_invokespecial:
1009   case Bytecodes::_invokestatic:
1010   case Bytecodes::_invokeinterface:
1011     resolve_invoke(thread, bytecode);
1012     break;
1013   case Bytecodes::_invokehandle:
1014     resolve_invokehandle(thread);
1015     break;
1016   case Bytecodes::_invokedynamic:
1017     resolve_invokedynamic(thread);
1018     break;
1019   default:
1020     fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1021     break;
1022   }
1023 }
1024 JRT_END
1025 
1026 //------------------------------------------------------------------------------------------------------------------------
1027 // Miscellaneous
1028 
1029 
1030 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
1031   nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
1032   assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
1033   if (branch_bcp != NULL && nm != NULL) {
1034     // This was a successful request for an OSR nmethod.  Because
1035     // frequency_counter_overflow_inner ends with a safepoint check,
1036     // nm could have been unloaded so look it up again.  It's unsafe
1037     // to examine nm directly since it might have been freed and used
1038     // for something else.
1039     LastFrameAccessor last_frame(thread);
1040     Method* method =  last_frame.method();
1041     int bci = method->bci_from(last_frame.bcp());
1042     nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1043     BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1044     if (nm != NULL && bs_nm != NULL) {
1045       // in case the transition passed a safepoint we need to barrier this again
1046       if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1047         nm = NULL;
1048       }
1049     }
1050   }
1051   if (nm != NULL && thread->is_interp_only_mode()) {
1052     // Normally we never get an nm if is_interp_only_mode() is true, because
1053     // policy()->event has a check for this and won't compile the method when
1054     // true. However, it's possible for is_interp_only_mode() to become true
1055     // during the compilation. We don't want to return the nm in that case
1056     // because we want to continue to execute interpreted.
1057     nm = NULL;
1058   }
1059 #ifndef PRODUCT
1060   if (TraceOnStackReplacement) {
1061     if (nm != NULL) {
1062       tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1063       nm->print();
1064     }
1065   }
1066 #endif
1067   return nm;
1068 }
1069 
1070 JRT_ENTRY(nmethod*,
1071           InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
1072   // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1073   // flag, in case this method triggers classloading which will call into Java.
1074   UnlockFlagSaver fs(thread);
1075 
1076   LastFrameAccessor last_frame(thread);
1077   assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1078   methodHandle method(thread, last_frame.method());
1079   const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
1080   const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1081 
1082   assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
1083   nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
1084   assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
1085 
1086   BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1087   if (osr_nm != NULL && bs_nm != NULL) {
1088     if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1089       osr_nm = NULL;
1090     }
1091   }
1092 
1093   if (osr_nm != NULL) {
1094     // We may need to do on-stack replacement which requires that no
1095     // monitors in the activation are biased because their
1096     // BasicObjectLocks will need to migrate during OSR. Force
1097     // unbiasing of all monitors in the activation now (even though
1098     // the OSR nmethod might be invalidated) because we don't have a
1099     // safepoint opportunity later once the migration begins.
1100     if (UseBiasedLocking) {
1101       ResourceMark rm;
1102       GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
1103       for( BasicObjectLock *kptr = last_frame.monitor_end();
1104            kptr < last_frame.monitor_begin();
1105            kptr = last_frame.next_monitor(kptr) ) {
1106         if( kptr->obj() != NULL ) {
1107           objects_to_revoke->append(Handle(THREAD, kptr->obj()));
1108         }
1109       }
1110       BiasedLocking::revoke(objects_to_revoke, thread);
1111     }
1112   }
1113   return osr_nm;
1114 JRT_END
1115 
1116 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1117   assert(ProfileInterpreter, "must be profiling interpreter");
1118   int bci = method->bci_from(cur_bcp);
1119   MethodData* mdo = method->method_data();
1120   if (mdo == NULL)  return 0;
1121   return mdo->bci_to_di(bci);
1122 JRT_END
1123 
1124 JRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
1125   // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1126   // flag, in case this method triggers classloading which will call into Java.
1127   UnlockFlagSaver fs(thread);
1128 
1129   assert(ProfileInterpreter, "must be profiling interpreter");
1130   LastFrameAccessor last_frame(thread);
1131   assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1132   methodHandle method(thread, last_frame.method());
1133   Method::build_interpreter_method_data(method, THREAD);
1134   if (HAS_PENDING_EXCEPTION) {
1135     assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1136     CLEAR_PENDING_EXCEPTION;
1137     // and fall through...
1138   }
1139 JRT_END
1140 
1141 
1142 #ifdef ASSERT
1143 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1144   assert(ProfileInterpreter, "must be profiling interpreter");
1145 
1146   MethodData* mdo = method->method_data();
1147   assert(mdo != NULL, "must not be null");
1148 
1149   int bci = method->bci_from(bcp);
1150 
1151   address mdp2 = mdo->bci_to_dp(bci);
1152   if (mdp != mdp2) {
1153     ResourceMark rm;
1154     ResetNoHandleMark rnm; // In a LEAF entry.
1155     HandleMark hm;
1156     tty->print_cr("FAILED verify : actual mdp %p   expected mdp %p @ bci %d", mdp, mdp2, bci);
1157     int current_di = mdo->dp_to_di(mdp);
1158     int expected_di  = mdo->dp_to_di(mdp2);
1159     tty->print_cr("  actual di %d   expected di %d", current_di, expected_di);
1160     int expected_approx_bci = mdo->data_at(expected_di)->bci();
1161     int approx_bci = -1;
1162     if (current_di >= 0) {
1163       approx_bci = mdo->data_at(current_di)->bci();
1164     }
1165     tty->print_cr("  actual bci is %d  expected bci %d", approx_bci, expected_approx_bci);
1166     mdo->print_on(tty);
1167     method->print_codes();
1168   }
1169   assert(mdp == mdp2, "wrong mdp");
1170 JRT_END
1171 #endif // ASSERT
1172 
1173 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1174   assert(ProfileInterpreter, "must be profiling interpreter");
1175   ResourceMark rm(thread);
1176   HandleMark hm(thread);
1177   LastFrameAccessor last_frame(thread);
1178   assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1179   MethodData* h_mdo = last_frame.method()->method_data();
1180 
1181   // Grab a lock to ensure atomic access to setting the return bci and
1182   // the displacement.  This can block and GC, invalidating all naked oops.
1183   MutexLocker ml(RetData_lock);
1184 
1185   // ProfileData is essentially a wrapper around a derived oop, so we
1186   // need to take the lock before making any ProfileData structures.
1187   ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1188   guarantee(data != NULL, "profile data must be valid");
1189   RetData* rdata = data->as_RetData();
1190   address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1191   last_frame.set_mdp(new_mdp);
1192 JRT_END
1193 
1194 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1195   MethodCounters* mcs = Method::build_method_counters(m, thread);
1196   if (HAS_PENDING_EXCEPTION) {
1197     assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1198     CLEAR_PENDING_EXCEPTION;
1199   }
1200   return mcs;
1201 JRT_END
1202 
1203 
1204 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1205   // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1206   // stack traversal automatically takes care of preserving arguments for invoke, so
1207   // this is no longer needed.
1208 
1209   // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1210   // if this is called during a safepoint
1211 
1212   if (JvmtiExport::should_post_single_step()) {
1213     // We are called during regular safepoints and when the VM is
1214     // single stepping. If any thread is marked for single stepping,
1215     // then we may have JVMTI work to do.
1216     LastFrameAccessor last_frame(thread);
1217     JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1218   }
1219 JRT_END
1220 
1221 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1222 ConstantPoolCacheEntry *cp_entry))
1223 
1224   // check the access_flags for the field in the klass
1225 
1226   InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1227   int index = cp_entry->field_index();
1228   if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1229 
1230   bool is_static = (obj == NULL);
1231   HandleMark hm(thread);
1232 
1233   Handle h_obj;
1234   if (!is_static) {
1235     // non-static field accessors have an object, but we need a handle
1236     h_obj = Handle(thread, obj);
1237   }
1238   InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1239   jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1240   LastFrameAccessor last_frame(thread);
1241   JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1242 JRT_END
1243 
1244 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1245   oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1246 
1247   Klass* k = cp_entry->f1_as_klass();
1248 
1249   // check the access_flags for the field in the klass
1250   InstanceKlass* ik = InstanceKlass::cast(k);
1251   int index = cp_entry->field_index();
1252   // bail out if field modifications are not watched
1253   if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1254 
1255   char sig_type = '\0';
1256 
1257   switch(cp_entry->flag_state()) {
1258     case btos: sig_type = 'B'; break;
1259     case ztos: sig_type = 'Z'; break;
1260     case ctos: sig_type = 'C'; break;
1261     case stos: sig_type = 'S'; break;
1262     case itos: sig_type = 'I'; break;
1263     case ftos: sig_type = 'F'; break;
1264     case atos: sig_type = 'L'; break;
1265     case ltos: sig_type = 'J'; break;
1266     case dtos: sig_type = 'D'; break;
1267     default:  ShouldNotReachHere(); return;
1268   }
1269   bool is_static = (obj == NULL);
1270 
1271   HandleMark hm(thread);
1272   jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1273   jvalue fvalue;
1274 #ifdef _LP64
1275   fvalue = *value;
1276 #else
1277   // Long/double values are stored unaligned and also noncontiguously with
1278   // tagged stacks.  We can't just do a simple assignment even in the non-
1279   // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1280   // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1281   // We assume that the two halves of longs/doubles are stored in interpreter
1282   // stack slots in platform-endian order.
1283   jlong_accessor u;
1284   jint* newval = (jint*)value;
1285   u.words[0] = newval[0];
1286   u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1287   fvalue.j = u.long_value;
1288 #endif // _LP64
1289 
1290   Handle h_obj;
1291   if (!is_static) {
1292     // non-static field accessors have an object, but we need a handle
1293     h_obj = Handle(thread, obj);
1294   }
1295 
1296   LastFrameAccessor last_frame(thread);
1297   JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1298                                            fid, sig_type, &fvalue);
1299 JRT_END
1300 
1301 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1302   LastFrameAccessor last_frame(thread);
1303   JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1304 JRT_END
1305 
1306 
1307 JRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1308   LastFrameAccessor last_frame(thread);
1309   JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1310 JRT_END
1311 
1312 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1313 {
1314   return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1315 }
1316 JRT_END
1317 
1318 
1319 // Implementation of SignatureHandlerLibrary
1320 
1321 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1322 // Dummy definition (else normalization method is defined in CPU
1323 // dependant code)
1324 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1325   return fingerprint;
1326 }
1327 #endif
1328 
1329 address SignatureHandlerLibrary::set_handler_blob() {
1330   BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1331   if (handler_blob == NULL) {
1332     return NULL;
1333   }
1334   address handler = handler_blob->code_begin();
1335   _handler_blob = handler_blob;
1336   _handler = handler;
1337   return handler;
1338 }
1339 
1340 void SignatureHandlerLibrary::initialize() {
1341   if (_fingerprints != NULL) {
1342     return;
1343   }
1344   if (set_handler_blob() == NULL) {
1345     vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1346   }
1347 
1348   BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1349                                       SignatureHandlerLibrary::buffer_size);
1350   _buffer = bb->code_begin();
1351 
1352   _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1353   _handlers     = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1354 }
1355 
1356 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1357   address handler   = _handler;
1358   int     insts_size = buffer->pure_insts_size();
1359   if (handler + insts_size > _handler_blob->code_end()) {
1360     // get a new handler blob
1361     handler = set_handler_blob();
1362   }
1363   if (handler != NULL) {
1364     memcpy(handler, buffer->insts_begin(), insts_size);
1365     pd_set_handler(handler);
1366     ICache::invalidate_range(handler, insts_size);
1367     _handler = handler + insts_size;
1368   }
1369   return handler;
1370 }
1371 
1372 void SignatureHandlerLibrary::add(const methodHandle& method) {
1373   if (method->signature_handler() == NULL) {
1374     // use slow signature handler if we can't do better
1375     int handler_index = -1;
1376     // check if we can use customized (fast) signature handler
1377     if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1378       // use customized signature handler
1379       MutexLocker mu(SignatureHandlerLibrary_lock);
1380       // make sure data structure is initialized
1381       initialize();
1382       // lookup method signature's fingerprint
1383       uint64_t fingerprint = Fingerprinter(method).fingerprint();
1384       // allow CPU dependant code to optimize the fingerprints for the fast handler
1385       fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1386       handler_index = _fingerprints->find(fingerprint);
1387       // create handler if necessary
1388       if (handler_index < 0) {
1389         ResourceMark rm;
1390         ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1391         CodeBuffer buffer((address)(_buffer + align_offset),
1392                           SignatureHandlerLibrary::buffer_size - align_offset);
1393         InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1394         // copy into code heap
1395         address handler = set_handler(&buffer);
1396         if (handler == NULL) {
1397           // use slow signature handler (without memorizing it in the fingerprints)
1398         } else {
1399           // debugging suppport
1400           if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1401             ttyLocker ttyl;
1402             tty->cr();
1403             tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1404                           _handlers->length(),
1405                           (method->is_static() ? "static" : "receiver"),
1406                           method->name_and_sig_as_C_string(),
1407                           fingerprint,
1408                           buffer.insts_size());
1409             if (buffer.insts_size() > 0) {
1410               Disassembler::decode(handler, handler + buffer.insts_size());
1411             }
1412 #ifndef PRODUCT
1413             address rh_begin = Interpreter::result_handler(method()->result_type());
1414             if (CodeCache::contains(rh_begin)) {
1415               // else it might be special platform dependent values
1416               tty->print_cr(" --- associated result handler ---");
1417               address rh_end = rh_begin;
1418               while (*(int*)rh_end != 0) {
1419                 rh_end += sizeof(int);
1420               }
1421               Disassembler::decode(rh_begin, rh_end);
1422             } else {
1423               tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1424             }
1425 #endif
1426           }
1427           // add handler to library
1428           _fingerprints->append(fingerprint);
1429           _handlers->append(handler);
1430           // set handler index
1431           assert(_fingerprints->length() == _handlers->length(), "sanity check");
1432           handler_index = _fingerprints->length() - 1;
1433         }
1434       }
1435       // Set handler under SignatureHandlerLibrary_lock
1436       if (handler_index < 0) {
1437         // use generic signature handler
1438         method->set_signature_handler(Interpreter::slow_signature_handler());
1439       } else {
1440         // set handler
1441         method->set_signature_handler(_handlers->at(handler_index));
1442       }
1443     } else {
1444       DEBUG_ONLY(Thread::current()->check_possible_safepoint());
1445       // use generic signature handler
1446       method->set_signature_handler(Interpreter::slow_signature_handler());
1447     }
1448   }
1449 #ifdef ASSERT
1450   int handler_index = -1;
1451   int fingerprint_index = -2;
1452   {
1453     // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1454     // in any way if accessed from multiple threads. To avoid races with another
1455     // thread which may change the arrays in the above, mutex protected block, we
1456     // have to protect this read access here with the same mutex as well!
1457     MutexLocker mu(SignatureHandlerLibrary_lock);
1458     if (_handlers != NULL) {
1459       handler_index = _handlers->find(method->signature_handler());
1460       uint64_t fingerprint = Fingerprinter(method).fingerprint();
1461       fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1462       fingerprint_index = _fingerprints->find(fingerprint);
1463     }
1464   }
1465   assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1466          handler_index == fingerprint_index, "sanity check");
1467 #endif // ASSERT
1468 }
1469 
1470 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1471   int handler_index = -1;
1472   // use customized signature handler
1473   MutexLocker mu(SignatureHandlerLibrary_lock);
1474   // make sure data structure is initialized
1475   initialize();
1476   fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1477   handler_index = _fingerprints->find(fingerprint);
1478   // create handler if necessary
1479   if (handler_index < 0) {
1480     if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1481       tty->cr();
1482       tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1483                     _handlers->length(),
1484                     p2i(handler),
1485                     fingerprint);
1486     }
1487     _fingerprints->append(fingerprint);
1488     _handlers->append(handler);
1489   } else {
1490     if (PrintSignatureHandlers) {
1491       tty->cr();
1492       tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1493                     _handlers->length(),
1494                     fingerprint,
1495                     p2i(_handlers->at(handler_index)),
1496                     p2i(handler));
1497     }
1498   }
1499 }
1500 
1501 
1502 BufferBlob*              SignatureHandlerLibrary::_handler_blob = NULL;
1503 address                  SignatureHandlerLibrary::_handler      = NULL;
1504 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1505 GrowableArray<address>*  SignatureHandlerLibrary::_handlers     = NULL;
1506 address                  SignatureHandlerLibrary::_buffer       = NULL;
1507 
1508 
1509 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1510   methodHandle m(thread, method);
1511   assert(m->is_native(), "sanity check");
1512   // lookup native function entry point if it doesn't exist
1513   bool in_base_library;
1514   if (!m->has_native_function()) {
1515     NativeLookup::lookup(m, in_base_library, CHECK);
1516   }
1517   // make sure signature handler is installed
1518   SignatureHandlerLibrary::add(m);
1519   // The interpreter entry point checks the signature handler first,
1520   // before trying to fetch the native entry point and klass mirror.
1521   // We must set the signature handler last, so that multiple processors
1522   // preparing the same method will be sure to see non-null entry & mirror.
1523 JRT_END
1524 
1525 #if defined(IA32) || defined(AMD64) || defined(ARM)
1526 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1527   if (src_address == dest_address) {
1528     return;
1529   }
1530   ResetNoHandleMark rnm; // In a LEAF entry.
1531   HandleMark hm;
1532   ResourceMark rm;
1533   LastFrameAccessor last_frame(thread);
1534   assert(last_frame.is_interpreted_frame(), "");
1535   jint bci = last_frame.bci();
1536   methodHandle mh(thread, last_frame.method());
1537   Bytecode_invoke invoke(mh, bci);
1538   ArgumentSizeComputer asc(invoke.signature());
1539   int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1540   Copy::conjoint_jbytes(src_address, dest_address,
1541                        size_of_arguments * Interpreter::stackElementSize);
1542 JRT_END
1543 #endif
1544 
1545 #if INCLUDE_JVMTI
1546 // This is a support of the JVMTI PopFrame interface.
1547 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1548 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1549 // The member_name argument is a saved reference (in local#0) to the member_name.
1550 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1551 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1552 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1553                                                             Method* method, address bcp))
1554   Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1555   if (code != Bytecodes::_invokestatic) {
1556     return;
1557   }
1558   ConstantPool* cpool = method->constants();
1559   int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1560   Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1561   Symbol* mname = cpool->name_ref_at(cp_index);
1562 
1563   if (MethodHandles::has_member_arg(cname, mname)) {
1564     oop member_name_oop = (oop) member_name;
1565     if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1566       // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1567       member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1568     }
1569     thread->set_vm_result(member_name_oop);
1570   } else {
1571     thread->set_vm_result(NULL);
1572   }
1573 JRT_END
1574 #endif // INCLUDE_JVMTI
1575 
1576 #ifndef PRODUCT
1577 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1578 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1579 // The generated code still uses call_VM because that will set up the frame pointer for
1580 // bcp and method.
1581 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1582   LastFrameAccessor last_frame(thread);
1583   assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1584   methodHandle mh(thread, last_frame.method());
1585   BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1586   return preserve_this_value;
1587 JRT_END
1588 #endif // !PRODUCT