1 /*
   2  * Copyright (c) 1997, 2024, 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/vmClasses.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/codeCache.hpp"
  31 #include "compiler/compilationPolicy.hpp"
  32 #include "compiler/compileBroker.hpp"
  33 #include "compiler/disassembler.hpp"
  34 #include "gc/shared/barrierSetNMethod.hpp"
  35 #include "gc/shared/collectedHeap.hpp"
  36 #include "interpreter/bytecodeTracer.hpp"
  37 #include "interpreter/interpreter.hpp"
  38 #include "interpreter/interpreterRuntime.hpp"
  39 #include "interpreter/linkResolver.hpp"
  40 #include "interpreter/templateTable.hpp"
  41 #include "jvm_io.h"
  42 #include "logging/log.hpp"
  43 #include "memory/oopFactory.hpp"
  44 #include "memory/resourceArea.hpp"
  45 #include "memory/universe.hpp"
  46 #include "oops/constantPool.inline.hpp"
  47 #include "oops/cpCache.inline.hpp"
  48 #include "oops/instanceKlass.inline.hpp"
  49 #include "oops/klass.inline.hpp"
  50 #include "oops/methodData.hpp"
  51 #include "oops/method.inline.hpp"
  52 #include "oops/objArrayKlass.hpp"
  53 #include "oops/objArrayOop.inline.hpp"
  54 #include "oops/oop.inline.hpp"
  55 #include "oops/symbol.hpp"
  56 #include "prims/jvmtiExport.hpp"
  57 #include "prims/methodHandles.hpp"
  58 #include "prims/nativeLookup.hpp"
  59 #include "runtime/atomic.hpp"
  60 #include "runtime/continuation.hpp"
  61 #include "runtime/deoptimization.hpp"
  62 #include "runtime/fieldDescriptor.inline.hpp"
  63 #include "runtime/frame.inline.hpp"
  64 #include "runtime/handles.inline.hpp"
  65 #include "runtime/icache.hpp"
  66 #include "runtime/interfaceSupport.inline.hpp"
  67 #include "runtime/java.hpp"
  68 #include "runtime/javaCalls.hpp"
  69 #include "runtime/jfieldIDWorkaround.hpp"
  70 #include "runtime/osThread.hpp"
  71 #include "runtime/perfData.inline.hpp"
  72 #include "runtime/sharedRuntime.hpp"
  73 #include "runtime/stackWatermarkSet.hpp"
  74 #include "runtime/stubRoutines.hpp"
  75 #include "runtime/synchronizer.hpp"
  76 #include "runtime/threadCritical.hpp"
  77 #include "services/management.hpp"
  78 #include "utilities/align.hpp"
  79 #include "utilities/checkedCast.hpp"
  80 #include "utilities/copy.hpp"
  81 #include "utilities/events.hpp"
  82 #ifdef COMPILER2
  83 #include "opto/runtime.hpp"
  84 #endif
  85 
  86 // Helper class to access current interpreter state
  87 class LastFrameAccessor : public StackObj {
  88   frame _last_frame;
  89 public:
  90   LastFrameAccessor(JavaThread* current) {
  91     assert(current == Thread::current(), "sanity");
  92     _last_frame = current->last_frame();
  93   }
  94   bool is_interpreted_frame() const              { return _last_frame.is_interpreted_frame(); }
  95   Method*   method() const                       { return _last_frame.interpreter_frame_method(); }
  96   address   bcp() const                          { return _last_frame.interpreter_frame_bcp(); }
  97   int       bci() const                          { return _last_frame.interpreter_frame_bci(); }
  98   address   mdp() const                          { return _last_frame.interpreter_frame_mdp(); }
  99 
 100   void      set_bcp(address bcp)                 { _last_frame.interpreter_frame_set_bcp(bcp); }
 101   void      set_mdp(address dp)                  { _last_frame.interpreter_frame_set_mdp(dp); }
 102 
 103   // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
 104   Bytecodes::Code code() const                   { return Bytecodes::code_at(method(), bcp()); }
 105 
 106   Bytecode  bytecode() const                     { return Bytecode(method(), bcp()); }
 107   int get_index_u1(Bytecodes::Code bc) const     { return bytecode().get_index_u1(bc); }
 108   int get_index_u2(Bytecodes::Code bc) const     { return bytecode().get_index_u2(bc); }
 109   int get_index_u4(Bytecodes::Code bc) const     { return bytecode().get_index_u4(bc); }
 110   int number_of_dimensions() const               { return bcp()[3]; }
 111 
 112   oop callee_receiver(Symbol* signature) {
 113     return _last_frame.interpreter_callee_receiver(signature);
 114   }
 115   BasicObjectLock* monitor_begin() const {
 116     return _last_frame.interpreter_frame_monitor_begin();
 117   }
 118   BasicObjectLock* monitor_end() const {
 119     return _last_frame.interpreter_frame_monitor_end();
 120   }
 121   BasicObjectLock* next_monitor(BasicObjectLock* current) const {
 122     return _last_frame.next_monitor_in_interpreter_frame(current);
 123   }
 124 
 125   frame& get_frame()                             { return _last_frame; }
 126 };
 127 
 128 static bool is_resolved(JavaThread* current) {
 129   LastFrameAccessor last_frame(current);
 130   ConstantPool* constants = last_frame.method()->constants();
 131   Bytecodes::Code bc = last_frame.code();
 132 
 133   if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
 134       bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
 135     bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
 136     int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
 137     constantTag tag = constants->tag_at(index);
 138     assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
 139     return constants->tag_at(index).is_klass();
 140   } else if (bc == Bytecodes::_invokedynamic) {
 141     int index = last_frame.get_index_u4(bc);
 142     int indy_index = constants->decode_invokedynamic_index(index);
 143     ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
 144     return indy_entry->is_resolved();
 145   } else if (Bytecodes::is_invoke(bc)) {
 146     int index = last_frame.get_index_u2(bc);
 147     ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
 148     return rme->is_resolved(bc);
 149   } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
 150     if (bc == Bytecodes::_nofast_getfield) {
 151       bc = Bytecodes::_getfield;
 152     } else if (bc == Bytecodes::_nofast_putfield) {
 153       bc = Bytecodes::_putfield;
 154     }
 155     int index = last_frame.get_index_u2(bc);
 156     ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
 157     return field_entry->is_resolved(bc);
 158   } else if (bc == Bytecodes::_new) {
 159     int index = last_frame.get_index_u2(bc);
 160     constantTag tag = constants->tag_at(index);
 161     assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
 162     return constants->tag_at(index).is_klass();
 163   }
 164   return false;
 165 }
 166 
 167 static void trace_current_location(JavaThread* current) {
 168   LogStreamHandle(Debug, init, interpreter) log;
 169   if (current->profile_rt_calls() && log.is_enabled()) {
 170     ResourceMark rm(current);
 171     LastFrameAccessor last_frame(current);
 172     Method* caller = last_frame.method();
 173     ConstantPool* constants = caller->constants();
 174     Bytecodes::Code bc = last_frame.code();
 175     log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
 176               p2i(current), Bytecodes::name(bc), p2i(caller));
 177     if (caller->is_shared()) {
 178       log.print(" shared");
 179     }
 180     if (is_resolved(current)) {
 181       log.print(" resolved");
 182     }
 183     log.print(" ");
 184     caller->print_short_name(&log);
 185     log.print(" @ %d:", last_frame.bci());
 186     int instruction_size = last_frame.bytecode().instruction_size();
 187 
 188     if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
 189       int index = last_frame.get_index_u2(bc);
 190       ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
 191       if (rme->is_resolved(bc)) {
 192         Method* m = rme->method();
 193         if (m != nullptr) {
 194           log.print(" %s", m->method_holder()->init_state_name());
 195         } else {
 196           log.print(" null");
 197         }
 198       }
 199     } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
 200       if (bc == Bytecodes::_nofast_getfield) {
 201         bc = Bytecodes::_getfield;
 202       } else if (bc == Bytecodes::_nofast_putfield) {
 203         bc = Bytecodes::_putfield;
 204       }
 205       int index = last_frame.get_index_u2(bc);
 206       ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
 207 
 208       if (field_entry->is_resolved(bc)) {
 209         log.print(" %s", field_entry->field_holder()->init_state_name());
 210       }
 211     } else if (bc == Bytecodes::_new) {
 212       int index = last_frame.get_index_u2(bc);
 213       constantTag tag = constants->tag_at(index);
 214       assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
 215       if (constants->tag_at(index).is_klass()) {
 216         CPKlassSlot kslot = constants->klass_slot_at(index);
 217         int resolved_klass_index = kslot.resolved_klass_index();
 218         Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
 219         log.print(": %s", InstanceKlass::cast(k)->init_state_name());
 220       }
 221     }
 222     log.print(" ");
 223     caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
 224 
 225     LogStreamHandle(Trace, init, interpreter) log1;
 226     if (log1.is_enabled()) {
 227       if (bc == Bytecodes::_invokedynamic) {
 228         int index = last_frame.get_index_u4(bc);
 229         int indy_index = constants->decode_invokedynamic_index(index);
 230         ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
 231         indy_entry->print_on(&log1);
 232       } else if (Bytecodes::is_invoke(bc)) {
 233         int index = last_frame.get_index_u2(bc);
 234         ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
 235         rme->print_on(&log1);
 236       } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
 237         int index = last_frame.get_index_u2(bc);
 238         ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
 239         field_entry->print_on(&log1);
 240       }
 241     }
 242   }
 243 }
 244 
 245 //------------------------------------------------------------------------------------------------------------------------
 246 // State accessors
 247 
 248 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
 249   LastFrameAccessor last_frame(current);
 250   last_frame.set_bcp(bcp);
 251   if (ProfileInterpreter) {
 252     // ProfileTraps uses MDOs independently of ProfileInterpreter.
 253     // That is why we must check both ProfileInterpreter and mdo != nullptr.
 254     MethodData* mdo = last_frame.method()->method_data();
 255     if (mdo != nullptr) {
 256       NEEDS_CLEANUP;
 257       last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
 258     }
 259   }
 260 }
 261 
 262 //------------------------------------------------------------------------------------------------------------------------
 263 // Constants
 264 
 265 
 266 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
 267   // access constant pool
 268   LastFrameAccessor last_frame(current);
 269   ConstantPool* pool = last_frame.method()->constants();
 270   int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
 271   constantTag tag = pool->tag_at(cp_index);
 272 
 273   assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
 274   Klass* klass = pool->klass_at(cp_index, CHECK);
 275   oop java_class = klass->java_mirror();
 276   current->set_vm_result(java_class);
 277 JRT_END
 278 
 279 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
 280   assert(bytecode == Bytecodes::_ldc ||
 281          bytecode == Bytecodes::_ldc_w ||
 282          bytecode == Bytecodes::_ldc2_w ||
 283          bytecode == Bytecodes::_fast_aldc ||
 284          bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
 285   ResourceMark rm(current);
 286   const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
 287                              bytecode == Bytecodes::_fast_aldc_w);
 288   LastFrameAccessor last_frame(current);
 289   methodHandle m (current, last_frame.method());
 290   Bytecode_loadconstant ldc(m, last_frame.bci());
 291 
 292   // Double-check the size.  (Condy can have any type.)
 293   BasicType type = ldc.result_type();
 294   switch (type2size[type]) {
 295   case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
 296   case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
 297   default: ShouldNotReachHere();
 298   }
 299 
 300   // Resolve the constant.  This does not do unboxing.
 301   // But it does replace Universe::the_null_sentinel by null.
 302   oop result = ldc.resolve_constant(CHECK);
 303   assert(result != nullptr || is_fast_aldc, "null result only valid for fast_aldc");
 304 
 305 #ifdef ASSERT
 306   {
 307     // The bytecode wrappers aren't GC-safe so construct a new one
 308     Bytecode_loadconstant ldc2(m, last_frame.bci());
 309     int rindex = ldc2.cache_index();
 310     if (rindex < 0)
 311       rindex = m->constants()->cp_to_object_index(ldc2.pool_index());
 312     if (rindex >= 0) {
 313       oop coop = m->constants()->resolved_reference_at(rindex);
 314       oop roop = (result == nullptr ? Universe::the_null_sentinel() : result);
 315       assert(roop == coop, "expected result for assembly code");
 316     }
 317   }
 318 #endif
 319   current->set_vm_result(result);
 320   if (!is_fast_aldc) {
 321     // Tell the interpreter how to unbox the primitive.
 322     guarantee(java_lang_boxing_object::is_instance(result, type), "");
 323     int offset = java_lang_boxing_object::value_offset(type);
 324     intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
 325                       | (offset & ConstantPoolCache::field_index_mask));
 326     current->set_vm_result_2((Metadata*)flags);
 327   }
 328 }
 329 JRT_END
 330 
 331 
 332 //------------------------------------------------------------------------------------------------------------------------
 333 // Allocation
 334 
 335 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
 336   Klass* k = pool->klass_at(index, CHECK);
 337   InstanceKlass* klass = InstanceKlass::cast(k);
 338 
 339   // Make sure we are not instantiating an abstract klass
 340   klass->check_valid_for_instantiation(true, CHECK);
 341 
 342   // Make sure klass is initialized
 343   klass->initialize(CHECK);
 344 
 345   // At this point the class may not be fully initialized
 346   // because of recursive initialization. If it is fully
 347   // initialized & has_finalized is not set, we rewrite
 348   // it into its fast version (Note: no locking is needed
 349   // here since this is an atomic byte write and can be
 350   // done more than once).
 351   //
 352   // Note: In case of classes with has_finalized we don't
 353   //       rewrite since that saves us an extra check in
 354   //       the fast version which then would call the
 355   //       slow version anyway (and do a call back into
 356   //       Java).
 357   //       If we have a breakpoint, then we don't rewrite
 358   //       because the _breakpoint bytecode would be lost.
 359   oop obj = klass->allocate_instance(CHECK);
 360   current->set_vm_result(obj);
 361 JRT_END
 362 
 363 
 364 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
 365   oop obj = oopFactory::new_typeArray(type, size, CHECK);
 366   current->set_vm_result(obj);
 367 JRT_END
 368 
 369 
 370 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
 371   Klass*    klass = pool->klass_at(index, CHECK);
 372   objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
 373   current->set_vm_result(obj);
 374 JRT_END
 375 
 376 
 377 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
 378   // We may want to pass in more arguments - could make this slightly faster
 379   LastFrameAccessor last_frame(current);
 380   ConstantPool* constants = last_frame.method()->constants();
 381   int          i = last_frame.get_index_u2(Bytecodes::_multianewarray);
 382   Klass* klass   = constants->klass_at(i, CHECK);
 383   int   nof_dims = last_frame.number_of_dimensions();
 384   assert(klass->is_klass(), "not a class");
 385   assert(nof_dims >= 1, "multianewarray rank must be nonzero");
 386 
 387   // We must create an array of jints to pass to multi_allocate.
 388   ResourceMark rm(current);
 389   const int small_dims = 10;
 390   jint dim_array[small_dims];
 391   jint *dims = &dim_array[0];
 392   if (nof_dims > small_dims) {
 393     dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
 394   }
 395   for (int index = 0; index < nof_dims; index++) {
 396     // offset from first_size_address is addressed as local[index]
 397     int n = Interpreter::local_offset_in_bytes(index)/jintSize;
 398     dims[index] = first_size_address[n];
 399   }
 400   oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
 401   current->set_vm_result(obj);
 402 JRT_END
 403 
 404 
 405 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
 406   assert(oopDesc::is_oop(obj), "must be a valid oop");
 407   assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
 408   InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
 409 JRT_END
 410 
 411 
 412 // Quicken instance-of and check-cast bytecodes
 413 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
 414   // Force resolving; quicken the bytecode
 415   LastFrameAccessor last_frame(current);
 416   int which = last_frame.get_index_u2(Bytecodes::_checkcast);
 417   ConstantPool* cpool = last_frame.method()->constants();
 418   // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
 419   // program we might have seen an unquick'd bytecode in the interpreter but have another
 420   // thread quicken the bytecode before we get here.
 421   // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
 422   Klass* klass = cpool->klass_at(which, CHECK);
 423   current->set_vm_result_2(klass);
 424 JRT_END
 425 
 426 
 427 //------------------------------------------------------------------------------------------------------------------------
 428 // Exceptions
 429 
 430 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
 431                                          const methodHandle& trap_method, int trap_bci) {
 432   if (trap_method.not_null()) {
 433     MethodData* trap_mdo = trap_method->method_data();
 434     if (trap_mdo == nullptr) {
 435       ExceptionMark em(current);
 436       JavaThread* THREAD = current; // For exception macros.
 437       Method::build_profiling_method_data(trap_method, THREAD);
 438       if (HAS_PENDING_EXCEPTION) {
 439         // Only metaspace OOM is expected. No Java code executed.
 440         assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())),
 441                "we expect only an OOM error here");
 442         CLEAR_PENDING_EXCEPTION;
 443       }
 444       trap_mdo = trap_method->method_data();
 445       // and fall through...
 446     }
 447     if (trap_mdo != nullptr) {
 448       // Update per-method count of trap events.  The interpreter
 449       // is updating the MDO to simulate the effect of compiler traps.
 450       Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
 451     }
 452   }
 453 }
 454 
 455 // Assume the compiler is (or will be) interested in this event.
 456 // If necessary, create an MDO to hold the information, and record it.
 457 void InterpreterRuntime::note_trap(JavaThread* current, int reason) {
 458   assert(ProfileTraps, "call me only if profiling");
 459   LastFrameAccessor last_frame(current);
 460   methodHandle trap_method(current, last_frame.method());
 461   int trap_bci = trap_method->bci_from(last_frame.bcp());
 462   note_trap_inner(current, reason, trap_method, trap_bci);
 463 }
 464 
 465 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
 466   // get klass
 467   InstanceKlass* klass = InstanceKlass::cast(k);
 468   assert(klass->is_initialized(),
 469          "this klass should have been initialized during VM initialization");
 470   // create instance - do not call constructor since we may have no
 471   // (java) stack space left (should assert constructor is empty)
 472   Handle exception;
 473   oop exception_oop = klass->allocate_instance(CHECK_(exception));
 474   exception = Handle(THREAD, exception_oop);
 475   if (StackTraceInThrowable) {
 476     java_lang_Throwable::fill_in_stack_trace(exception);
 477   }
 478   return exception;
 479 }
 480 
 481 // Special handling for stack overflow: since we don't have any (java) stack
 482 // space left we use the pre-allocated & pre-initialized StackOverflowError
 483 // klass to create an stack overflow error instance.  We do not call its
 484 // constructor for the same reason (it is empty, anyway).
 485 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
 486            InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
 487   Handle exception = get_preinitialized_exception(
 488                                  vmClasses::StackOverflowError_klass(),
 489                                  CHECK);
 490   // Increment counter for hs_err file reporting
 491   Atomic::inc(&Exceptions::_stack_overflow_errors);
 492   // Remove the ScopedValue bindings in case we got a StackOverflowError
 493   // while we were trying to manipulate ScopedValue bindings.
 494   current->clear_scopedValueBindings();
 495   THROW_HANDLE(exception);
 496 JRT_END
 497 
 498 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
 499            InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
 500   Handle exception = get_preinitialized_exception(
 501                                  vmClasses::StackOverflowError_klass(),
 502                                  CHECK);
 503   java_lang_Throwable::set_message(exception(),
 504           Universe::delayed_stack_overflow_error_message());
 505   // Increment counter for hs_err file reporting
 506   Atomic::inc(&Exceptions::_stack_overflow_errors);
 507   // Remove the ScopedValue bindings in case we got a StackOverflowError
 508   // while we were trying to manipulate ScopedValue bindings.
 509   current->clear_scopedValueBindings();
 510   THROW_HANDLE(exception);
 511 JRT_END
 512 
 513 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
 514            InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
 515   // lookup exception klass
 516   TempNewSymbol s = SymbolTable::new_symbol(name);
 517   if (ProfileTraps) {
 518     if (s == vmSymbols::java_lang_ArithmeticException()) {
 519       note_trap(current, Deoptimization::Reason_div0_check);
 520     } else if (s == vmSymbols::java_lang_NullPointerException()) {
 521       note_trap(current, Deoptimization::Reason_null_check);
 522     }
 523   }
 524   // create exception
 525   Handle exception = Exceptions::new_exception(current, s, message);
 526   current->set_vm_result(exception());
 527 JRT_END
 528 
 529 
 530 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
 531            InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
 532   // Produce the error message first because note_trap can safepoint
 533   ResourceMark rm(current);
 534   const char* klass_name = obj->klass()->external_name();
 535   // lookup exception klass
 536   TempNewSymbol s = SymbolTable::new_symbol(name);
 537   if (ProfileTraps) {
 538     if (s == vmSymbols::java_lang_ArrayStoreException()) {
 539       note_trap(current, Deoptimization::Reason_array_check);
 540     } else {
 541       note_trap(current, Deoptimization::Reason_class_check);
 542     }
 543   }
 544   // create exception, with klass name as detail message
 545   Handle exception = Exceptions::new_exception(current, s, klass_name);
 546   current->set_vm_result(exception());
 547 JRT_END
 548 
 549 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
 550            InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
 551   // Produce the error message first because note_trap can safepoint
 552   ResourceMark rm(current);
 553   stringStream ss;
 554   ss.print("Index %d out of bounds for length %d", index, a->length());
 555 
 556   if (ProfileTraps) {
 557     note_trap(current, Deoptimization::Reason_range_check);
 558   }
 559 
 560   THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
 561 JRT_END
 562 
 563 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
 564            InterpreterRuntime::throw_ClassCastException(
 565   JavaThread* current, oopDesc* obj))
 566 
 567   // Produce the error message first because note_trap can safepoint
 568   ResourceMark rm(current);
 569   char* message = SharedRuntime::generate_class_cast_message(
 570     current, obj->klass());
 571 
 572   if (ProfileTraps) {
 573     note_trap(current, Deoptimization::Reason_class_check);
 574   }
 575 
 576   // create exception
 577   THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
 578 JRT_END
 579 
 580 // exception_handler_for_exception(...) returns the continuation address,
 581 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
 582 // The exception oop is returned to make sure it is preserved over GC (it
 583 // is only on the stack if the exception was thrown explicitly via athrow).
 584 // During this operation, the expression stack contains the values for the
 585 // bci where the exception happened. If the exception was propagated back
 586 // from a call, the expression stack contains the values for the bci at the
 587 // invoke w/o arguments (i.e., as if one were inside the call).
 588 // Note that the implementation of this method assumes it's only called when an exception has actually occured
 589 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
 590            InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
 591   // We get here after we have unwound from a callee throwing an exception
 592   // into the interpreter. Any deferred stack processing is notified of
 593   // the event via the StackWatermarkSet.
 594   StackWatermarkSet::after_unwind(current);
 595 
 596   LastFrameAccessor last_frame(current);
 597   Handle             h_exception(current, exception);
 598   methodHandle       h_method   (current, last_frame.method());
 599   constantPoolHandle h_constants(current, h_method->constants());
 600   bool               should_repeat;
 601   int                handler_bci;
 602   int                current_bci = last_frame.bci();
 603 
 604   if (current->frames_to_pop_failed_realloc() > 0) {
 605     // Allocation of scalar replaced object used in this frame
 606     // failed. Unconditionally pop the frame.
 607     current->dec_frames_to_pop_failed_realloc();
 608     current->set_vm_result(h_exception());
 609     // If the method is synchronized we already unlocked the monitor
 610     // during deoptimization so the interpreter needs to skip it when
 611     // the frame is popped.
 612     current->set_do_not_unlock_if_synchronized(true);
 613     return Interpreter::remove_activation_entry();
 614   }
 615 
 616   // Need to do this check first since when _do_not_unlock_if_synchronized
 617   // is set, we don't want to trigger any classloading which may make calls
 618   // into java, or surprisingly find a matching exception handler for bci 0
 619   // since at this moment the method hasn't been "officially" entered yet.
 620   if (current->do_not_unlock_if_synchronized()) {
 621     ResourceMark rm;
 622     assert(current_bci == 0,  "bci isn't zero for do_not_unlock_if_synchronized");
 623     current->set_vm_result(exception);
 624     return Interpreter::remove_activation_entry();
 625   }
 626 
 627   do {
 628     should_repeat = false;
 629 
 630     // assertions
 631     assert(h_exception.not_null(), "null exceptions should be handled by athrow");
 632     // Check that exception is a subclass of Throwable.
 633     assert(h_exception->is_a(vmClasses::Throwable_klass()),
 634            "Exception not subclass of Throwable");
 635 
 636     // tracing
 637     if (log_is_enabled(Info, exceptions)) {
 638       ResourceMark rm(current);
 639       stringStream tempst;
 640       tempst.print("interpreter method <%s>\n"
 641                    " at bci %d for thread " INTPTR_FORMAT " (%s)",
 642                    h_method->print_value_string(), current_bci, p2i(current), current->name());
 643       Exceptions::log_exception(h_exception, tempst.as_string());
 644     }
 645 // Don't go paging in something which won't be used.
 646 //     else if (extable->length() == 0) {
 647 //       // disabled for now - interpreter is not using shortcut yet
 648 //       // (shortcut is not to call runtime if we have no exception handlers)
 649 //       // warning("performance bug: should not call runtime if method has no exception handlers");
 650 //     }
 651     // for AbortVMOnException flag
 652     Exceptions::debug_check_abort(h_exception);
 653 
 654     // exception handler lookup
 655     Klass* klass = h_exception->klass();
 656     handler_bci = Method::fast_exception_handler_bci_for(h_method, klass, current_bci, THREAD);
 657     if (HAS_PENDING_EXCEPTION) {
 658       // We threw an exception while trying to find the exception handler.
 659       // Transfer the new exception to the exception handle which will
 660       // be set into thread local storage, and do another lookup for an
 661       // exception handler for this exception, this time starting at the
 662       // BCI of the exception handler which caused the exception to be
 663       // thrown (bug 4307310).
 664       h_exception = Handle(THREAD, PENDING_EXCEPTION);
 665       CLEAR_PENDING_EXCEPTION;
 666       if (handler_bci >= 0) {
 667         current_bci = handler_bci;
 668         should_repeat = true;
 669       }
 670     }
 671   } while (should_repeat == true);
 672 
 673 #if INCLUDE_JVMCI
 674   if (EnableJVMCI && h_method->method_data() != nullptr) {
 675     ResourceMark rm(current);
 676     MethodData* mdo = h_method->method_data();
 677 
 678     // Lock to read ProfileData, and ensure lock is not broken by a safepoint
 679     MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
 680 
 681     ProfileData* pdata = mdo->allocate_bci_to_data(current_bci, nullptr);
 682     if (pdata != nullptr && pdata->is_BitData()) {
 683       BitData* bit_data = (BitData*) pdata;
 684       bit_data->set_exception_seen();
 685     }
 686   }
 687 #endif
 688 
 689   // notify JVMTI of an exception throw; JVMTI will detect if this is a first
 690   // time throw or a stack unwinding throw and accordingly notify the debugger
 691   if (JvmtiExport::can_post_on_exceptions()) {
 692     JvmtiExport::post_exception_throw(current, h_method(), last_frame.bcp(), h_exception());
 693   }
 694 
 695   address continuation = nullptr;
 696   address handler_pc = nullptr;
 697   if (handler_bci < 0 || !current->stack_overflow_state()->reguard_stack((address) &continuation)) {
 698     // Forward exception to callee (leaving bci/bcp untouched) because (a) no
 699     // handler in this method, or (b) after a stack overflow there is not yet
 700     // enough stack space available to reprotect the stack.
 701     continuation = Interpreter::remove_activation_entry();
 702 #if COMPILER2_OR_JVMCI
 703     // Count this for compilation purposes
 704     h_method->interpreter_throwout_increment(THREAD);
 705 #endif
 706   } else {
 707     // handler in this method => change bci/bcp to handler bci/bcp and continue there
 708     handler_pc = h_method->code_base() + handler_bci;
 709     h_method->set_exception_handler_entered(handler_bci); // profiling
 710 #ifndef ZERO
 711     set_bcp_and_mdp(handler_pc, current);
 712     continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
 713 #else
 714     continuation = (address)(intptr_t) handler_bci;
 715 #endif
 716   }
 717 
 718   // notify debugger of an exception catch
 719   // (this is good for exceptions caught in native methods as well)
 720   if (JvmtiExport::can_post_on_exceptions()) {
 721     JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
 722   }
 723 
 724   current->set_vm_result(h_exception());
 725   return continuation;
 726 JRT_END
 727 
 728 
 729 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
 730   assert(current->has_pending_exception(), "must only be called if there's an exception pending");
 731   // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
 732 JRT_END
 733 
 734 
 735 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
 736   THROW(vmSymbols::java_lang_AbstractMethodError());
 737 JRT_END
 738 
 739 // This method is called from the "abstract_entry" of the interpreter.
 740 // At that point, the arguments have already been removed from the stack
 741 // and therefore we don't have the receiver object at our fingertips. (Though,
 742 // on some platforms the receiver still resides in a register...). Thus,
 743 // we have no choice but print an error message not containing the receiver
 744 // type.
 745 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
 746            InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
 747                                                                    Method* missingMethod))
 748   ResourceMark rm(current);
 749   assert(missingMethod != nullptr, "sanity");
 750   methodHandle m(current, missingMethod);
 751   LinkResolver::throw_abstract_method_error(m, THREAD);
 752 JRT_END
 753 
 754 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
 755           InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
 756                                                                Klass* recvKlass,
 757                                                                Method* missingMethod))
 758   ResourceMark rm(current);
 759   methodHandle mh = methodHandle(current, missingMethod);
 760   LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
 761 JRT_END
 762 
 763 
 764 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
 765            InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
 766   THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
 767 JRT_END
 768 
 769 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
 770            InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
 771                                                                          Klass* recvKlass,
 772                                                                          Klass* interfaceKlass))
 773   ResourceMark rm(current);
 774   char buf[1000];
 775   buf[0] = '\0';
 776   jio_snprintf(buf, sizeof(buf),
 777                "Class %s does not implement the requested interface %s",
 778                recvKlass ? recvKlass->external_name() : "nullptr",
 779                interfaceKlass ? interfaceKlass->external_name() : "nullptr");
 780   THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
 781 JRT_END
 782 
 783 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
 784            InterpreterRuntime::throw_NullPointerException(JavaThread* current))
 785   THROW(vmSymbols::java_lang_NullPointerException());
 786 JRT_END
 787 
 788 //------------------------------------------------------------------------------------------------------------------------
 789 // Fields
 790 //
 791 
 792 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
 793   resolve_get_put(current, Bytecodes::_getfield);
 794 PROF_END
 795 
 796 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
 797   resolve_get_put(current, Bytecodes::_putfield);
 798 PROF_END
 799 
 800 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
 801   resolve_get_put(current, Bytecodes::_getstatic);
 802 PROF_END
 803 
 804 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
 805   resolve_get_put(current, Bytecodes::_putstatic);
 806 PROF_END
 807 
 808 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
 809   LastFrameAccessor last_frame(current);
 810   constantPoolHandle pool(current, last_frame.method()->constants());
 811   methodHandle m(current, last_frame.method());
 812 
 813   resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
 814 }
 815 
 816 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
 817                                          methodHandle& m,
 818                                          constantPoolHandle& pool,
 819                                          bool initialize_holder, TRAPS) {
 820   fieldDescriptor info;
 821   bool is_put    = (bytecode == Bytecodes::_putfield  || bytecode == Bytecodes::_nofast_putfield ||
 822                     bytecode == Bytecodes::_putstatic);
 823   bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
 824 
 825   {
 826     JvmtiHideSingleStepping jhss(THREAD);
 827     LinkResolver::resolve_field_access(info, pool, field_index,
 828                                        m, bytecode, initialize_holder, CHECK);
 829   } // end JvmtiHideSingleStepping
 830 
 831   // check if link resolution caused cpCache to be updated
 832   if (pool->resolved_field_entry_at(field_index)->is_resolved(bytecode)) return;
 833 
 834   // compute auxiliary field attributes
 835   TosState state  = as_TosState(info.field_type());
 836 
 837   // Resolution of put instructions on final fields is delayed. That is required so that
 838   // exceptions are thrown at the correct place (when the instruction is actually invoked).
 839   // If we do not resolve an instruction in the current pass, leaving the put_code
 840   // set to zero will cause the next put instruction to the same field to reresolve.
 841 
 842   // Resolution of put instructions to final instance fields with invalid updates (i.e.,
 843   // to final instance fields with updates originating from a method different than <init>)
 844   // is inhibited. A putfield instruction targeting an instance final field must throw
 845   // an IllegalAccessError if the instruction is not in an instance
 846   // initializer method <init>. If resolution were not inhibited, a putfield
 847   // in an initializer method could be resolved in the initializer. Subsequent
 848   // putfield instructions to the same field would then use cached information.
 849   // As a result, those instructions would not pass through the VM. That is,
 850   // checks in resolve_field_access() would not be executed for those instructions
 851   // and the required IllegalAccessError would not be thrown.
 852   //
 853   // Also, we need to delay resolving getstatic and putstatic instructions until the
 854   // class is initialized.  This is required so that access to the static
 855   // field will call the initialization function every time until the class
 856   // is completely initialized ala. in 2.17.5 in JVM Specification.
 857   InstanceKlass* klass = info.field_holder();
 858   bool uninitialized_static = is_static && !klass->is_initialized();
 859   bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
 860                                       info.has_initialized_final_update();
 861   assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
 862 
 863   Bytecodes::Code get_code = (Bytecodes::Code)0;
 864   Bytecodes::Code put_code = (Bytecodes::Code)0;
 865   if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
 866 #if !defined(X86) && !defined(AARCH64)
 867     guarantee(!uninitialized_static, "fast class init checks missing in interpreter"); // FIXME
 868 #endif // !X86 && !AARCH64
 869     get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
 870     if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
 871       put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
 872     }
 873   }
 874 
 875   ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
 876   entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
 877   entry->fill_in(info.field_holder(), info.offset(),
 878                  checked_cast<u2>(info.index()), checked_cast<u1>(state),
 879                  static_cast<u1>(get_code), static_cast<u1>(put_code));
 880 }
 881 
 882 
 883 //------------------------------------------------------------------------------------------------------------------------
 884 // Synchronization
 885 //
 886 // The interpreter's synchronization code is factored out so that it can
 887 // be shared by method invocation and synchronized blocks.
 888 //%note synchronization_3
 889 
 890 //%note monitor_1
 891 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
 892   assert(LockingMode != LM_LIGHTWEIGHT, "Should call monitorenter_obj() when using the new lightweight locking");
 893 #ifdef ASSERT
 894   current->last_frame().interpreter_frame_verify_monitor(elem);
 895 #endif
 896   Handle h_obj(current, elem->obj());
 897   assert(Universe::heap()->is_in_or_null(h_obj()),
 898          "must be null or an object");
 899   ObjectSynchronizer::enter(h_obj, elem->lock(), current);
 900   assert(Universe::heap()->is_in_or_null(elem->obj()),
 901          "must be null or an object");
 902 #ifdef ASSERT
 903   current->last_frame().interpreter_frame_verify_monitor(elem);
 904 #endif
 905 JRT_END
 906 
 907 // NOTE: We provide a separate implementation for the new lightweight locking to workaround a limitation
 908 // of registers in x86_32. This entry point accepts an oop instead of a BasicObjectLock*.
 909 // The problem is that we would need to preserve the register that holds the BasicObjectLock,
 910 // but we are using that register to hold the thread. We don't have enough registers to
 911 // also keep the BasicObjectLock, but we don't really need it anyway, we only need
 912 // the object. See also InterpreterMacroAssembler::lock_object().
 913 // As soon as legacy stack-locking goes away we could remove the other monitorenter() entry
 914 // point, and only use oop-accepting entries (same for monitorexit() below).
 915 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter_obj, InterpreterRuntime::monitorenter_obj(JavaThread* current, oopDesc* obj))
 916   assert(LockingMode == LM_LIGHTWEIGHT, "Should call monitorenter() when not using the new lightweight locking");
 917   Handle h_obj(current, cast_to_oop(obj));
 918   assert(Universe::heap()->is_in_or_null(h_obj()),
 919          "must be null or an object");
 920   ObjectSynchronizer::enter(h_obj, nullptr, current);
 921   return;
 922 JRT_END
 923 
 924 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
 925   oop obj = elem->obj();
 926   assert(Universe::heap()->is_in(obj), "must be an object");
 927   // The object could become unlocked through a JNI call, which we have no other checks for.
 928   // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
 929   if (obj->is_unlocked()) {
 930     if (CheckJNICalls) {
 931       fatal("Object has been unlocked by JNI");
 932     }
 933     return;
 934   }
 935   ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
 936   // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
 937   // again at method exit or in the case of an exception.
 938   elem->set_obj(nullptr);
 939 JRT_END
 940 
 941 
 942 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
 943            InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
 944   THROW(vmSymbols::java_lang_IllegalMonitorStateException());
 945 JRT_END
 946 
 947 
 948 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
 949            InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
 950   // Returns an illegal exception to install into the current thread. The
 951   // pending_exception flag is cleared so normal exception handling does not
 952   // trigger. Any current installed exception will be overwritten. This
 953   // method will be called during an exception unwind.
 954 
 955   assert(!HAS_PENDING_EXCEPTION, "no pending exception");
 956   Handle exception(current, current->vm_result());
 957   assert(exception() != nullptr, "vm result should be set");
 958   current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
 959   exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
 960   current->set_vm_result(exception());
 961 JRT_END
 962 
 963 
 964 //------------------------------------------------------------------------------------------------------------------------
 965 // Invokes
 966 
 967 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
 968   return method->orig_bytecode_at(method->bci_from(bcp));
 969 JRT_END
 970 
 971 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
 972   method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
 973 JRT_END
 974 
 975 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
 976   JvmtiExport::post_raw_breakpoint(current, method, bcp);
 977 JRT_END
 978 
 979 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
 980   resolve_invoke(current, Bytecodes::_invokevirtual);
 981 PROF_END
 982 
 983 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
 984   resolve_invoke(current, Bytecodes::_invokespecial);
 985 PROF_END
 986 
 987 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
 988   resolve_invoke(current, Bytecodes::_invokestatic);
 989 PROF_END
 990 
 991 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
 992   resolve_invoke(current, Bytecodes::_invokeinterface);
 993 PROF_END
 994 
 995 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
 996   LastFrameAccessor last_frame(current);
 997   // extract receiver from the outgoing argument list if necessary
 998   Handle receiver(current, nullptr);
 999   if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
1000       bytecode == Bytecodes::_invokespecial) {
1001     ResourceMark rm(current);
1002     methodHandle m (current, last_frame.method());
1003     Bytecode_invoke call(m, last_frame.bci());
1004     Symbol* signature = call.signature();
1005     receiver = Handle(current, last_frame.callee_receiver(signature));
1006 
1007     assert(Universe::heap()->is_in_or_null(receiver()),
1008            "sanity check");
1009     assert(receiver.is_null() ||
1010            !Universe::heap()->is_in(receiver->klass()),
1011            "sanity check");
1012   }
1013 
1014   // resolve method
1015   CallInfo info;
1016   constantPoolHandle pool(current, last_frame.method()->constants());
1017 
1018   methodHandle resolved_method;
1019 
1020   int method_index = last_frame.get_index_u2(bytecode);
1021   {
1022     JvmtiHideSingleStepping jhss(current);
1023     JavaThread* THREAD = current; // For exception macros.
1024     LinkResolver::resolve_invoke(info, receiver, pool,
1025                                  method_index, bytecode,
1026                                  THREAD);
1027 
1028     if (HAS_PENDING_EXCEPTION) {
1029       if (ProfileTraps && PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_NullPointerException()) {
1030         // Preserve the original exception across the call to note_trap()
1031         PreserveExceptionMark pm(current);
1032         // Recording the trap will help the compiler to potentially recognize this exception as "hot"
1033         note_trap(current, Deoptimization::Reason_null_check);
1034       }
1035       return;
1036     }
1037 
1038     if (JvmtiExport::can_hotswap_or_post_breakpoint() && info.resolved_method()->is_old()) {
1039       resolved_method = methodHandle(current, info.resolved_method()->get_new_method());
1040     } else {
1041       resolved_method = methodHandle(current, info.resolved_method());
1042     }
1043   } // end JvmtiHideSingleStepping
1044 
1045   update_invoke_cp_cache_entry(info, bytecode, resolved_method, pool, method_index);
1046 }
1047 
1048 void InterpreterRuntime::update_invoke_cp_cache_entry(CallInfo& info, Bytecodes::Code bytecode,
1049                                                       methodHandle& resolved_method,
1050                                                       constantPoolHandle& pool,
1051                                                       int method_index) {
1052   // check if link resolution caused cpCache to be updated
1053   ConstantPoolCache* cache = pool->cache();
1054   if (cache->resolved_method_entry_at(method_index)->is_resolved(bytecode)) return;
1055 
1056 #ifdef ASSERT
1057   if (bytecode == Bytecodes::_invokeinterface) {
1058     if (resolved_method->method_holder() == vmClasses::Object_klass()) {
1059       // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
1060       // (see also CallInfo::set_interface for details)
1061       assert(info.call_kind() == CallInfo::vtable_call ||
1062              info.call_kind() == CallInfo::direct_call, "");
1063       assert(resolved_method->is_final() || info.has_vtable_index(),
1064              "should have been set already");
1065     } else if (!resolved_method->has_itable_index()) {
1066       // Resolved something like CharSequence.toString.  Use vtable not itable.
1067       assert(info.call_kind() != CallInfo::itable_call, "");
1068     } else {
1069       // Setup itable entry
1070       assert(info.call_kind() == CallInfo::itable_call, "");
1071       int index = resolved_method->itable_index();
1072       assert(info.itable_index() == index, "");
1073     }
1074   } else if (bytecode == Bytecodes::_invokespecial) {
1075     assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
1076   } else {
1077     assert(info.call_kind() == CallInfo::direct_call ||
1078            info.call_kind() == CallInfo::vtable_call, "");
1079   }
1080 #endif
1081   // Get sender and only set cpCache entry to resolved if it is not an
1082   // interface.  The receiver for invokespecial calls within interface
1083   // methods must be checked for every call.
1084   InstanceKlass* sender = pool->pool_holder();
1085 
1086   switch (info.call_kind()) {
1087   case CallInfo::direct_call:
1088     cache->set_direct_call(bytecode, method_index, resolved_method, sender->is_interface());
1089     break;
1090   case CallInfo::vtable_call:
1091     cache->set_vtable_call(bytecode, method_index, resolved_method, info.vtable_index());
1092     break;
1093   case CallInfo::itable_call:
1094     cache->set_itable_call(
1095       bytecode,
1096       method_index,
1097       info.resolved_klass(),
1098       resolved_method,
1099       info.itable_index());
1100     break;
1101   default:  ShouldNotReachHere();
1102   }
1103 }
1104 
1105 
1106 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1107                                             methodHandle& m, constantPoolHandle& pool, TRAPS) {
1108   LinkInfo link_info(pool, method_index, bytecode, CHECK);
1109 
1110   if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1111     CallInfo call_info;
1112     switch (bytecode) {
1113       case Bytecodes::_invokevirtual:   LinkResolver::cds_resolve_virtual_call  (call_info, link_info, CHECK); break;
1114       case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1115       case Bytecodes::_invokestatic:    LinkResolver::cds_resolve_static_call   (call_info, link_info, CHECK); break;
1116       case Bytecodes::_invokespecial:   LinkResolver::cds_resolve_special_call  (call_info, link_info, CHECK); break;
1117 
1118       default: fatal("NYI: %s", Bytecodes::name(bytecode));
1119     }
1120     methodHandle resolved_method(THREAD, call_info.resolved_method());
1121     guarantee(resolved_method->method_holder()->is_linked(), "");
1122     update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1123   } else {
1124     // FIXME: why a shared class is not linked yet?
1125     // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1126     ResourceMark rm;
1127     InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1128     log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
1129                            resolved_iklass->is_shared() ? "is_shared" : "",
1130                            resolved_iklass->init_state_name(),
1131                            resolved_iklass->external_name());
1132   }
1133 }
1134 
1135 // First time execution:  Resolve symbols, create a permanent MethodType object.
1136 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1137   const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1138   LastFrameAccessor last_frame(current);
1139 
1140   // resolve method
1141   CallInfo info;
1142   constantPoolHandle pool(current, last_frame.method()->constants());
1143   int method_index = last_frame.get_index_u2(bytecode);
1144   {
1145     JvmtiHideSingleStepping jhss(current);
1146     JavaThread* THREAD = current; // For exception macros.
1147     LinkResolver::resolve_invoke(info, Handle(), pool,
1148                                  method_index, bytecode,
1149                                  CHECK);
1150   } // end JvmtiHideSingleStepping
1151 
1152   pool->cache()->set_method_handle(method_index, info);
1153 PROF_END
1154 
1155 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1156                                                   constantPoolHandle& pool, TRAPS) {
1157   const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1158   CallInfo info;
1159   LinkResolver::resolve_invoke(info, Handle(), pool,
1160                                raw_index, bytecode, CHECK);
1161 
1162   pool->cache()->set_method_handle(raw_index, info);
1163 }
1164 
1165 // First time execution:  Resolve symbols, create a permanent CallSite object.
1166 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1167   LastFrameAccessor last_frame(current);
1168   const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1169 
1170   // resolve method
1171   CallInfo info;
1172   constantPoolHandle pool(current, last_frame.method()->constants());
1173   int index = last_frame.get_index_u4(bytecode);
1174   {
1175     JvmtiHideSingleStepping jhss(current);
1176     JavaThread* THREAD = current; // For exception macros.
1177     LinkResolver::resolve_invoke(info, Handle(), pool,
1178                                  index, bytecode, CHECK);
1179   } // end JvmtiHideSingleStepping
1180 
1181   pool->cache()->set_dynamic_call(info, pool->decode_invokedynamic_index(index));
1182 PROF_END
1183 
1184 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1185                                                    constantPoolHandle& pool, TRAPS) {
1186   const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1187   CallInfo info;
1188   LinkResolver::resolve_invoke(info, Handle(), pool,
1189                                raw_index, bytecode, CHECK);
1190   pool->cache()->set_dynamic_call(info, pool->decode_invokedynamic_index(raw_index));
1191 }
1192 
1193 // This function is the interface to the assembly code. It returns the resolved
1194 // cpCache entry.  This doesn't safepoint, but the helper routines safepoint.
1195 // This function will check for redefinition!
1196 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1197   trace_current_location(current);
1198 
1199   switch (bytecode) {
1200   case Bytecodes::_getstatic: resolve_getstatic(current); break;
1201   case Bytecodes::_putstatic: resolve_putstatic(current); break;
1202   case Bytecodes::_getfield:  resolve_getfield(current);  break;
1203   case Bytecodes::_putfield:  resolve_putfield(current);  break;
1204 
1205   case Bytecodes::_invokevirtual:   resolve_invokevirtual(current);   break;
1206   case Bytecodes::_invokespecial:   resolve_invokespecial(current);   break;
1207   case Bytecodes::_invokestatic:    resolve_invokestatic(current);    break;
1208   case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1209   case Bytecodes::_invokehandle:    resolve_invokehandle(current);    break;
1210   case Bytecodes::_invokedynamic:   resolve_invokedynamic(current);   break;
1211 
1212   default:
1213     fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1214     break;
1215   }
1216 }
1217 JRT_END
1218 
1219 //------------------------------------------------------------------------------------------------------------------------
1220 // Miscellaneous
1221 
1222 
1223 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1224   // Enable WXWrite: the function is called directly by interpreter.
1225   MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1226 
1227   // frequency_counter_overflow_inner can throw async exception.
1228   nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1229   assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1230   if (branch_bcp != nullptr && nm != nullptr) {
1231     // This was a successful request for an OSR nmethod.  Because
1232     // frequency_counter_overflow_inner ends with a safepoint check,
1233     // nm could have been unloaded so look it up again.  It's unsafe
1234     // to examine nm directly since it might have been freed and used
1235     // for something else.
1236     LastFrameAccessor last_frame(current);
1237     Method* method =  last_frame.method();
1238     int bci = method->bci_from(last_frame.bcp());
1239     nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1240     BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1241     if (nm != nullptr && bs_nm != nullptr) {
1242       // in case the transition passed a safepoint we need to barrier this again
1243       if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1244         nm = nullptr;
1245       }
1246     }
1247   }
1248   if (nm != nullptr && current->is_interp_only_mode()) {
1249     // Normally we never get an nm if is_interp_only_mode() is true, because
1250     // policy()->event has a check for this and won't compile the method when
1251     // true. However, it's possible for is_interp_only_mode() to become true
1252     // during the compilation. We don't want to return the nm in that case
1253     // because we want to continue to execute interpreted.
1254     nm = nullptr;
1255   }
1256 #ifndef PRODUCT
1257   if (TraceOnStackReplacement) {
1258     if (nm != nullptr) {
1259       tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1260       nm->print();
1261     }
1262   }
1263 #endif
1264   return nm;
1265 }
1266 
1267 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1268           InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1269   // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1270   // flag, in case this method triggers classloading which will call into Java.
1271   UnlockFlagSaver fs(current);
1272 
1273   LastFrameAccessor last_frame(current);
1274   assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1275   methodHandle method(current, last_frame.method());
1276   const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1277   const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1278 
1279   nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1280 
1281   BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1282   if (osr_nm != nullptr && bs_nm != nullptr) {
1283     if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1284       osr_nm = nullptr;
1285     }
1286   }
1287   return osr_nm;
1288 JRT_END
1289 
1290 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1291   assert(ProfileInterpreter, "must be profiling interpreter");
1292   int bci = method->bci_from(cur_bcp);
1293   MethodData* mdo = method->method_data();
1294   if (mdo == nullptr)  return 0;
1295   return mdo->bci_to_di(bci);
1296 JRT_END
1297 
1298 #ifdef ASSERT
1299 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1300   assert(ProfileInterpreter, "must be profiling interpreter");
1301 
1302   MethodData* mdo = method->method_data();
1303   assert(mdo != nullptr, "must not be null");
1304 
1305   int bci = method->bci_from(bcp);
1306 
1307   address mdp2 = mdo->bci_to_dp(bci);
1308   if (mdp != mdp2) {
1309     ResourceMark rm;
1310     tty->print_cr("FAILED verify : actual mdp %p   expected mdp %p @ bci %d", mdp, mdp2, bci);
1311     int current_di = mdo->dp_to_di(mdp);
1312     int expected_di  = mdo->dp_to_di(mdp2);
1313     tty->print_cr("  actual di %d   expected di %d", current_di, expected_di);
1314     int expected_approx_bci = mdo->data_at(expected_di)->bci();
1315     int approx_bci = -1;
1316     if (current_di >= 0) {
1317       approx_bci = mdo->data_at(current_di)->bci();
1318     }
1319     tty->print_cr("  actual bci is %d  expected bci %d", approx_bci, expected_approx_bci);
1320     mdo->print_on(tty);
1321     method->print_codes();
1322   }
1323   assert(mdp == mdp2, "wrong mdp");
1324 JRT_END
1325 #endif // ASSERT
1326 
1327 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1328   assert(ProfileInterpreter, "must be profiling interpreter");
1329   ResourceMark rm(current);
1330   LastFrameAccessor last_frame(current);
1331   assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1332   MethodData* h_mdo = last_frame.method()->method_data();
1333 
1334   // Grab a lock to ensure atomic access to setting the return bci and
1335   // the displacement.  This can block and GC, invalidating all naked oops.
1336   MutexLocker ml(RetData_lock);
1337 
1338   // ProfileData is essentially a wrapper around a derived oop, so we
1339   // need to take the lock before making any ProfileData structures.
1340   ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1341   guarantee(data != nullptr, "profile data must be valid");
1342   RetData* rdata = data->as_RetData();
1343   address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1344   last_frame.set_mdp(new_mdp);
1345 JRT_END
1346 
1347 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1348   return Method::build_method_counters(current, m);
1349 JRT_END
1350 
1351 
1352 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1353   // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1354   // stack traversal automatically takes care of preserving arguments for invoke, so
1355   // this is no longer needed.
1356 
1357   // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1358   // if this is called during a safepoint
1359 
1360   if (JvmtiExport::should_post_single_step()) {
1361     // This function is called by the interpreter when single stepping. Such single
1362     // stepping could unwind a frame. Then, it is important that we process any frames
1363     // that we might return into.
1364     StackWatermarkSet::before_unwind(current);
1365 
1366     // We are called during regular safepoints and when the VM is
1367     // single stepping. If any thread is marked for single stepping,
1368     // then we may have JVMTI work to do.
1369     LastFrameAccessor last_frame(current);
1370     JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1371   }
1372 JRT_END
1373 
1374 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1375   assert(current == JavaThread::current(), "pre-condition");
1376   // This function is called by the interpreter when the return poll found a reason
1377   // to call the VM. The reason could be that we are returning into a not yet safe
1378   // to access frame. We handle that below.
1379   // Note that this path does not check for single stepping, because we do not want
1380   // to single step when unwinding frames for an exception being thrown. Instead,
1381   // such single stepping code will use the safepoint table, which will use the
1382   // InterpreterRuntime::at_safepoint callback.
1383   StackWatermarkSet::before_unwind(current);
1384 JRT_END
1385 
1386 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1387                                                                                ResolvedFieldEntry *entry))
1388 
1389   // check the access_flags for the field in the klass
1390 
1391   InstanceKlass* ik = entry->field_holder();
1392   int index = entry->field_index();
1393   if (!ik->field_status(index).is_access_watched()) return;
1394 
1395   bool is_static = (obj == nullptr);
1396   HandleMark hm(current);
1397 
1398   Handle h_obj;
1399   if (!is_static) {
1400     // non-static field accessors have an object, but we need a handle
1401     h_obj = Handle(current, obj);
1402   }
1403   InstanceKlass* field_holder = entry->field_holder(); // HERE
1404   jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1405   LastFrameAccessor last_frame(current);
1406   JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1407 JRT_END
1408 
1409 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1410                                                                                            ResolvedFieldEntry *entry, jvalue *value))
1411 
1412   InstanceKlass* ik = entry->field_holder();
1413 
1414   // check the access_flags for the field in the klass
1415   int index = entry->field_index();
1416   // bail out if field modifications are not watched
1417   if (!ik->field_status(index).is_modification_watched()) return;
1418 
1419   char sig_type = '\0';
1420 
1421   switch((TosState)entry->tos_state()) {
1422     case btos: sig_type = JVM_SIGNATURE_BYTE;    break;
1423     case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1424     case ctos: sig_type = JVM_SIGNATURE_CHAR;    break;
1425     case stos: sig_type = JVM_SIGNATURE_SHORT;   break;
1426     case itos: sig_type = JVM_SIGNATURE_INT;     break;
1427     case ftos: sig_type = JVM_SIGNATURE_FLOAT;   break;
1428     case atos: sig_type = JVM_SIGNATURE_CLASS;   break;
1429     case ltos: sig_type = JVM_SIGNATURE_LONG;    break;
1430     case dtos: sig_type = JVM_SIGNATURE_DOUBLE;  break;
1431     default:  ShouldNotReachHere(); return;
1432   }
1433   bool is_static = (obj == nullptr);
1434 
1435   HandleMark hm(current);
1436   jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1437   jvalue fvalue;
1438 #ifdef _LP64
1439   fvalue = *value;
1440 #else
1441   // Long/double values are stored unaligned and also noncontiguously with
1442   // tagged stacks.  We can't just do a simple assignment even in the non-
1443   // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1444   // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1445   // We assume that the two halves of longs/doubles are stored in interpreter
1446   // stack slots in platform-endian order.
1447   jlong_accessor u;
1448   jint* newval = (jint*)value;
1449   u.words[0] = newval[0];
1450   u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1451   fvalue.j = u.long_value;
1452 #endif // _LP64
1453 
1454   Handle h_obj;
1455   if (!is_static) {
1456     // non-static field accessors have an object, but we need a handle
1457     h_obj = Handle(current, obj);
1458   }
1459 
1460   LastFrameAccessor last_frame(current);
1461   JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1462                                            fid, sig_type, &fvalue);
1463 JRT_END
1464 
1465 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1466   LastFrameAccessor last_frame(current);
1467   JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1468 JRT_END
1469 
1470 
1471 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1472 // before transitioning to VM, and restore it after transitioning back
1473 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1474 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1475   LastFrameAccessor last_frame(current);
1476   JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1477 JRT_END
1478 
1479 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1480 {
1481   return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1482 }
1483 JRT_END
1484 
1485 
1486 // Implementation of SignatureHandlerLibrary
1487 
1488 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1489 // Dummy definition (else normalization method is defined in CPU
1490 // dependent code)
1491 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1492   return fingerprint;
1493 }
1494 #endif
1495 
1496 address SignatureHandlerLibrary::set_handler_blob() {
1497   BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1498   if (handler_blob == nullptr) {
1499     return nullptr;
1500   }
1501   address handler = handler_blob->code_begin();
1502   _handler_blob = handler_blob;
1503   _handler = handler;
1504   return handler;
1505 }
1506 
1507 void SignatureHandlerLibrary::initialize() {
1508   if (_fingerprints != nullptr) {
1509     return;
1510   }
1511   if (set_handler_blob() == nullptr) {
1512     vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1513   }
1514 
1515   BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1516                                       SignatureHandlerLibrary::buffer_size);
1517   _buffer = bb->code_begin();
1518 
1519   _fingerprints = new (mtCode) GrowableArray<uint64_t>(32, mtCode);
1520   _handlers     = new (mtCode) GrowableArray<address>(32, mtCode);
1521 }
1522 
1523 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1524   address handler   = _handler;
1525   int     insts_size = buffer->pure_insts_size();
1526   if (handler + insts_size > _handler_blob->code_end()) {
1527     // get a new handler blob
1528     handler = set_handler_blob();
1529   }
1530   if (handler != nullptr) {
1531     memcpy(handler, buffer->insts_begin(), insts_size);
1532     pd_set_handler(handler);
1533     ICache::invalidate_range(handler, insts_size);
1534     _handler = handler + insts_size;
1535   }
1536   return handler;
1537 }
1538 
1539 void SignatureHandlerLibrary::add(const methodHandle& method) {
1540   if (method->signature_handler() == nullptr) {
1541     // use slow signature handler if we can't do better
1542     int handler_index = -1;
1543     // check if we can use customized (fast) signature handler
1544     if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::fp_max_size_of_parameters) {
1545       // use customized signature handler
1546       MutexLocker mu(SignatureHandlerLibrary_lock);
1547       // make sure data structure is initialized
1548       initialize();
1549       // lookup method signature's fingerprint
1550       uint64_t fingerprint = Fingerprinter(method).fingerprint();
1551       // allow CPU dependent code to optimize the fingerprints for the fast handler
1552       fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1553       handler_index = _fingerprints->find(fingerprint);
1554       // create handler if necessary
1555       if (handler_index < 0) {
1556         ResourceMark rm;
1557         ptrdiff_t align_offset = align_up(_buffer, CodeEntryAlignment) - (address)_buffer;
1558         CodeBuffer buffer((address)(_buffer + align_offset),
1559                           checked_cast<int>(SignatureHandlerLibrary::buffer_size - align_offset));
1560         InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1561         // copy into code heap
1562         address handler = set_handler(&buffer);
1563         if (handler == nullptr) {
1564           // use slow signature handler (without memorizing it in the fingerprints)
1565         } else {
1566           // debugging support
1567           if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1568             ttyLocker ttyl;
1569             tty->cr();
1570             tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1571                           _handlers->length(),
1572                           (method->is_static() ? "static" : "receiver"),
1573                           method->name_and_sig_as_C_string(),
1574                           fingerprint,
1575                           buffer.insts_size());
1576             if (buffer.insts_size() > 0) {
1577               Disassembler::decode(handler, handler + buffer.insts_size(), tty
1578                                    NOT_PRODUCT(COMMA &buffer.asm_remarks()));
1579             }
1580 #ifndef PRODUCT
1581             address rh_begin = Interpreter::result_handler(method()->result_type());
1582             if (CodeCache::contains(rh_begin)) {
1583               // else it might be special platform dependent values
1584               tty->print_cr(" --- associated result handler ---");
1585               address rh_end = rh_begin;
1586               while (*(int*)rh_end != 0) {
1587                 rh_end += sizeof(int);
1588               }
1589               Disassembler::decode(rh_begin, rh_end);
1590             } else {
1591               tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1592             }
1593 #endif
1594           }
1595           // add handler to library
1596           _fingerprints->append(fingerprint);
1597           _handlers->append(handler);
1598           // set handler index
1599           assert(_fingerprints->length() == _handlers->length(), "sanity check");
1600           handler_index = _fingerprints->length() - 1;
1601         }
1602       }
1603       // Set handler under SignatureHandlerLibrary_lock
1604       if (handler_index < 0) {
1605         // use generic signature handler
1606         method->set_signature_handler(Interpreter::slow_signature_handler());
1607       } else {
1608         // set handler
1609         method->set_signature_handler(_handlers->at(handler_index));
1610       }
1611     } else {
1612       DEBUG_ONLY(JavaThread::current()->check_possible_safepoint());
1613       // use generic signature handler
1614       method->set_signature_handler(Interpreter::slow_signature_handler());
1615     }
1616   }
1617 #ifdef ASSERT
1618   int handler_index = -1;
1619   int fingerprint_index = -2;
1620   {
1621     // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1622     // in any way if accessed from multiple threads. To avoid races with another
1623     // thread which may change the arrays in the above, mutex protected block, we
1624     // have to protect this read access here with the same mutex as well!
1625     MutexLocker mu(SignatureHandlerLibrary_lock);
1626     if (_handlers != nullptr) {
1627       handler_index = _handlers->find(method->signature_handler());
1628       uint64_t fingerprint = Fingerprinter(method).fingerprint();
1629       fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1630       fingerprint_index = _fingerprints->find(fingerprint);
1631     }
1632   }
1633   assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1634          handler_index == fingerprint_index, "sanity check");
1635 #endif // ASSERT
1636 }
1637 
1638 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1639   int handler_index = -1;
1640   // use customized signature handler
1641   MutexLocker mu(SignatureHandlerLibrary_lock);
1642   // make sure data structure is initialized
1643   initialize();
1644   fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1645   handler_index = _fingerprints->find(fingerprint);
1646   // create handler if necessary
1647   if (handler_index < 0) {
1648     if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1649       tty->cr();
1650       tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1651                     _handlers->length(),
1652                     p2i(handler),
1653                     fingerprint);
1654     }
1655     _fingerprints->append(fingerprint);
1656     _handlers->append(handler);
1657   } else {
1658     if (PrintSignatureHandlers) {
1659       tty->cr();
1660       tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1661                     _handlers->length(),
1662                     fingerprint,
1663                     p2i(_handlers->at(handler_index)),
1664                     p2i(handler));
1665     }
1666   }
1667 }
1668 
1669 
1670 BufferBlob*              SignatureHandlerLibrary::_handler_blob = nullptr;
1671 address                  SignatureHandlerLibrary::_handler      = nullptr;
1672 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1673 GrowableArray<address>*  SignatureHandlerLibrary::_handlers     = nullptr;
1674 address                  SignatureHandlerLibrary::_buffer       = nullptr;
1675 
1676 
1677 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1678   methodHandle m(current, method);
1679   assert(m->is_native(), "sanity check");
1680   // lookup native function entry point if it doesn't exist
1681   if (!m->has_native_function()) {
1682     NativeLookup::lookup(m, CHECK);
1683   }
1684   // make sure signature handler is installed
1685   SignatureHandlerLibrary::add(m);
1686   // The interpreter entry point checks the signature handler first,
1687   // before trying to fetch the native entry point and klass mirror.
1688   // We must set the signature handler last, so that multiple processors
1689   // preparing the same method will be sure to see non-null entry & mirror.
1690 JRT_END
1691 
1692 #if defined(IA32) || defined(AMD64) || defined(ARM)
1693 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1694   assert(current == JavaThread::current(), "pre-condition");
1695   if (src_address == dest_address) {
1696     return;
1697   }
1698   ResourceMark rm;
1699   LastFrameAccessor last_frame(current);
1700   assert(last_frame.is_interpreted_frame(), "");
1701   jint bci = last_frame.bci();
1702   methodHandle mh(current, last_frame.method());
1703   Bytecode_invoke invoke(mh, bci);
1704   ArgumentSizeComputer asc(invoke.signature());
1705   int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1706   Copy::conjoint_jbytes(src_address, dest_address,
1707                        size_of_arguments * Interpreter::stackElementSize);
1708 JRT_END
1709 #endif
1710 
1711 #if INCLUDE_JVMTI
1712 // This is a support of the JVMTI PopFrame interface.
1713 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1714 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1715 // The member_name argument is a saved reference (in local#0) to the member_name.
1716 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1717 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1718 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1719            InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1720                                                        Method* method, address bcp))
1721   Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1722   if (code != Bytecodes::_invokestatic) {
1723     return;
1724   }
1725   ConstantPool* cpool = method->constants();
1726   int cp_index = Bytes::get_native_u2(bcp + 1);
1727   Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1728   Symbol* mname = cpool->name_ref_at(cp_index, code);
1729 
1730   if (MethodHandles::has_member_arg(cname, mname)) {
1731     oop member_name_oop = cast_to_oop(member_name);
1732     if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1733       // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1734       member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1735     }
1736     current->set_vm_result(member_name_oop);
1737   } else {
1738     current->set_vm_result(nullptr);
1739   }
1740 JRT_END
1741 #endif // INCLUDE_JVMTI
1742 
1743 #ifndef PRODUCT
1744 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1745 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1746 // The generated code still uses call_VM because that will set up the frame pointer for
1747 // bcp and method.
1748 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1749   assert(current == JavaThread::current(), "pre-condition");
1750   LastFrameAccessor last_frame(current);
1751   assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1752   methodHandle mh(current, last_frame.method());
1753   BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1754   return preserve_this_value;
1755 JRT_END
1756 #endif // !PRODUCT
1757 
1758 #define DO_COUNTERS(macro) \
1759   macro(InterpreterRuntime, ldc) \
1760   macro(InterpreterRuntime, resolve_ldc) \
1761   macro(InterpreterRuntime, new) \
1762   macro(InterpreterRuntime, newarray) \
1763   macro(InterpreterRuntime, anewarray) \
1764   macro(InterpreterRuntime, multianewarray) \
1765   macro(InterpreterRuntime, register_finalizer) \
1766   macro(InterpreterRuntime, quicken_io_cc) \
1767   macro(InterpreterRuntime, throw_StackOverflowError) \
1768   macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1769   macro(InterpreterRuntime, create_exception) \
1770   macro(InterpreterRuntime, create_klass_exception) \
1771   macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1772   macro(InterpreterRuntime, throw_ClassCastException) \
1773   macro(InterpreterRuntime, exception_handler_for_exception) \
1774   macro(InterpreterRuntime, throw_pending_exception) \
1775   macro(InterpreterRuntime, throw_AbstractMethodError) \
1776   macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1777   macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1778   macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1779   macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1780   macro(InterpreterRuntime, throw_NullPointerException) \
1781   macro(InterpreterRuntime, monitorenter) \
1782   macro(InterpreterRuntime, monitorenter_obj) \
1783   macro(InterpreterRuntime, monitorexit) \
1784   macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1785   macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1786   macro(InterpreterRuntime, get_original_bytecode_at) \
1787   macro(InterpreterRuntime, set_original_bytecode_at) \
1788   macro(InterpreterRuntime, breakpoint) \
1789   macro(InterpreterRuntime, resolve_getfield) \
1790   macro(InterpreterRuntime, resolve_putfield) \
1791   macro(InterpreterRuntime, resolve_getstatic) \
1792   macro(InterpreterRuntime, resolve_putstatic) \
1793   macro(InterpreterRuntime, resolve_invokevirtual) \
1794   macro(InterpreterRuntime, resolve_invokespecial) \
1795   macro(InterpreterRuntime, resolve_invokestatic) \
1796   macro(InterpreterRuntime, resolve_invokeinterface) \
1797   macro(InterpreterRuntime, resolve_invokehandle) \
1798   macro(InterpreterRuntime, resolve_invokedynamic) \
1799   macro(InterpreterRuntime, frequency_counter_overflow) \
1800   macro(InterpreterRuntime, bcp_to_di) \
1801   macro(InterpreterRuntime, update_mdp_for_ret) \
1802   macro(InterpreterRuntime, build_method_counters) \
1803   macro(InterpreterRuntime, at_safepoint) \
1804   macro(InterpreterRuntime, at_unwind) \
1805   macro(InterpreterRuntime, post_field_access) \
1806   macro(InterpreterRuntime, post_field_modification) \
1807   macro(InterpreterRuntime, post_method_entry) \
1808   macro(InterpreterRuntime, post_method_exit) \
1809   macro(InterpreterRuntime, interpreter_contains) \
1810   macro(InterpreterRuntime, prepare_native_call) \
1811   macro(InterpreterRuntime, member_name_arg_or_null)
1812 
1813 #define INIT_COUNTER(sub, name) \
1814   NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1815   NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1816 
1817 void InterpreterRuntime::init_counters() {
1818   if (UsePerfData) {
1819     EXCEPTION_MARK;
1820 
1821     DO_COUNTERS(INIT_COUNTER)
1822 
1823     if (HAS_PENDING_EXCEPTION) {
1824       vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1825     }
1826   }
1827 }
1828 #undef INIT_COUNTER
1829 
1830 #define PRINT_COUNTER(sub, name) { \
1831   jlong count = _perf_##sub##_##name##_count->get_value(); \
1832   if (count > 0) { \
1833     st->print_cr("  %-50s = %4ldms (elapsed) %4ldms (thread) (%5ld events)", #sub "::" #name, \
1834                  _perf_##sub##_##name##_timer->elapsed_counter_value_ms(), \
1835                  _perf_##sub##_##name##_timer->thread_counter_value_ms(), \
1836                  count); \
1837   }}
1838 
1839 void InterpreterRuntime::print_counters_on(outputStream* st) {
1840   if (UsePerfData && ProfileRuntimeCalls) {
1841     DO_COUNTERS(PRINT_COUNTER)
1842   } else {
1843     st->print_cr("  InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1844   }
1845 }
1846 
1847 #undef PRINT_COUNTER
1848 #undef DO_COUNTERS
1849