jdk8-mips64-public/hotspot: src/share/vm/interpreter/interpreterRuntime.cpp@f8a45a60bc6b (annotated)

src/share/vm/interpreter/interpreterRuntime.cpp@f8a45a60bc6b (annotated)

src/share/vm/interpreter/interpreterRuntime.cpp

Fri, 29 Sep 2017 14:30:05 -0400

author: dbuck
date: Fri, 29 Sep 2017 14:30:05 -0400
changeset 8997: f8a45a60bc6b
parent 8936: b56e03b3e2d9
child 9013: 18366fa39fe0
permissions: -rw-r--r--

8174962: Better interface invocations
Reviewed-by: jrose, coleenp, ahgross, acorn, vlivanov

 /*
  * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "compiler/compileBroker.hpp"
 #include "compiler/disassembler.hpp"
 #include "gc_interface/collectedHeap.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "interpreter/linkResolver.hpp"
 #include "interpreter/templateTable.hpp"
 #include "memory/oopFactory.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/constantPool.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/methodData.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/symbol.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/nativeLookup.hpp"
 #include "runtime/biasedLocking.hpp"
 #include "runtime/compilationPolicy.hpp"
 #include "runtime/deoptimization.hpp"
 #include "runtime/fieldDescriptor.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/java.hpp"
 #include "runtime/jfieldIDWorkaround.hpp"
 #include "runtime/osThread.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/synchronizer.hpp"
 #include "runtime/threadCritical.hpp"
 #include "utilities/events.hpp"
 #ifdef TARGET_ARCH_x86
 # include "vm_version_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "vm_version_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_zero
 # include "vm_version_zero.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "vm_version_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "vm_version_ppc.hpp"
 #endif
 #ifdef COMPILER2
 #include "opto/runtime.hpp"
 #endif
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 class UnlockFlagSaver {
   private:
     JavaThread* _thread;
     bool _do_not_unlock;
   public:
     UnlockFlagSaver(JavaThread* t) {
       _thread = t;
       _do_not_unlock = t->do_not_unlock_if_synchronized();
       t->set_do_not_unlock_if_synchronized(false);
     }
     ~UnlockFlagSaver() {
       _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
     }
 };
 //------------------------------------------------------------------------------------------------------------------------
 // State accessors
 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
   last_frame(thread).interpreter_frame_set_bcp(bcp);
   if (ProfileInterpreter) {
     // ProfileTraps uses MDOs independently of ProfileInterpreter.
     // That is why we must check both ProfileInterpreter and mdo != NULL.
     MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
     if (mdo != NULL) {
       NEEDS_CLEANUP;
       last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
     }
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Constants
 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
   // access constant pool
   ConstantPool* pool = method(thread)->constants();
   int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
   constantTag tag = pool->tag_at(index);
   assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
   Klass* klass = pool->klass_at(index, CHECK);
     oop java_class = klass->java_mirror();
     thread->set_vm_result(java_class);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
   assert(bytecode == Bytecodes::_fast_aldc ||
          bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
   ResourceMark rm(thread);
   methodHandle m (thread, method(thread));
   Bytecode_loadconstant ldc(m, bci(thread));
   oop result = ldc.resolve_constant(CHECK);
 #ifdef ASSERT
   {
     // The bytecode wrappers aren't GC-safe so construct a new one
     Bytecode_loadconstant ldc2(m, bci(thread));
     oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
     assert(result == coop, "expected result for assembly code");
   }
 #endif
   thread->set_vm_result(result);
 }
 IRT_END
 //------------------------------------------------------------------------------------------------------------------------
 // Allocation
 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
   Klass* k_oop = pool->klass_at(index, CHECK);
   instanceKlassHandle klass (THREAD, k_oop);
   // Make sure we are not instantiating an abstract klass
   klass->check_valid_for_instantiation(true, CHECK);
   // Make sure klass is initialized
   klass->initialize(CHECK);
   // At this point the class may not be fully initialized
   // because of recursive initialization. If it is fully
   // initialized & has_finalized is not set, we rewrite
   // it into its fast version (Note: no locking is needed
   // here since this is an atomic byte write and can be
   // done more than once).
   //
   // Note: In case of classes with has_finalized we don't
   //       rewrite since that saves us an extra check in
   //       the fast version which then would call the
   //       slow version anyway (and do a call back into
   //       Java).
   //       If we have a breakpoint, then we don't rewrite
   //       because the _breakpoint bytecode would be lost.
   oop obj = klass->allocate_instance(CHECK);
   thread->set_vm_result(obj);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
   oop obj = oopFactory::new_typeArray(type, size, CHECK);
   thread->set_vm_result(obj);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
   // Note: no oopHandle for pool & klass needed since they are not used
   //       anymore after new_objArray() and no GC can happen before.
   //       (This may have to change if this code changes!)
   Klass*    klass = pool->klass_at(index, CHECK);
   objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
   thread->set_vm_result(obj);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
   // We may want to pass in more arguments - could make this slightly faster
   ConstantPool* constants = method(thread)->constants();
   int          i = get_index_u2(thread, Bytecodes::_multianewarray);
   Klass* klass = constants->klass_at(i, CHECK);
   int   nof_dims = number_of_dimensions(thread);
   assert(klass->is_klass(), "not a class");
   assert(nof_dims >= 1, "multianewarray rank must be nonzero");
   // We must create an array of jints to pass to multi_allocate.
   ResourceMark rm(thread);
   const int small_dims = 10;
   jint dim_array[small_dims];
   jint *dims = &dim_array[0];
   if (nof_dims > small_dims) {
     dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
   }
   for (int index = 0; index < nof_dims; index++) {
     // offset from first_size_address is addressed as local[index]
     int n = Interpreter::local_offset_in_bytes(index)/jintSize;
     dims[index] = first_size_address[n];
   }
   oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
   thread->set_vm_result(obj);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
   assert(obj->is_oop(), "must be a valid oop");
   assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
   InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
 IRT_END
 // Quicken instance-of and check-cast bytecodes
 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
   // Force resolving; quicken the bytecode
   int which = get_index_u2(thread, Bytecodes::_checkcast);
   ConstantPool* cpool = method(thread)->constants();
   // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
   // program we might have seen an unquick'd bytecode in the interpreter but have another
   // thread quicken the bytecode before we get here.
   // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
   Klass* klass = cpool->klass_at(which, CHECK);
   thread->set_vm_result_2(klass);
 IRT_END
 //------------------------------------------------------------------------------------------------------------------------
 // Exceptions
 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
                                          methodHandle trap_method, int trap_bci, TRAPS) {
   if (trap_method.not_null()) {
     MethodData* trap_mdo = trap_method->method_data();
     if (trap_mdo == NULL) {
       Method::build_interpreter_method_data(trap_method, THREAD);
       if (HAS_PENDING_EXCEPTION) {
         assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
                "we expect only an OOM error here");
         CLEAR_PENDING_EXCEPTION;
       }
       trap_mdo = trap_method->method_data();
       // and fall through...
     }
     if (trap_mdo != NULL) {
       // Update per-method count of trap events.  The interpreter
       // is updating the MDO to simulate the effect of compiler traps.
       Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
     }
   }
 }
 // Assume the compiler is (or will be) interested in this event.
 // If necessary, create an MDO to hold the information, and record it.
 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
   assert(ProfileTraps, "call me only if profiling");
   methodHandle trap_method(thread, method(thread));
   int trap_bci = trap_method->bci_from(bcp(thread));
   note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
 }
 #ifdef CC_INTERP
 // As legacy note_trap, but we have more arguments.
 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
   methodHandle trap_method(method);
   note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
 IRT_END
 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
 // for each exception.
 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
   { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
 #endif // CC_INTERP
 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
   // get klass
   InstanceKlass* klass = InstanceKlass::cast(k);
   assert(klass->is_initialized(),
          "this klass should have been initialized during VM initialization");
   // create instance - do not call constructor since we may have no
   // (java) stack space left (should assert constructor is empty)
   Handle exception;
   oop exception_oop = klass->allocate_instance(CHECK_(exception));
   exception = Handle(THREAD, exception_oop);
   if (StackTraceInThrowable) {
     java_lang_Throwable::fill_in_stack_trace(exception);
   }
   return exception;
 }
 // Special handling for stack overflow: since we don't have any (java) stack
 // space left we use the pre-allocated & pre-initialized StackOverflowError
 // klass to create an stack overflow error instance.  We do not call its
 // constructor for the same reason (it is empty, anyway).
 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
   Handle exception = get_preinitialized_exception(
                                  SystemDictionary::StackOverflowError_klass(),
                                  CHECK);
   THROW_HANDLE(exception);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
   // lookup exception klass
   TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
   if (ProfileTraps) {
     if (s == vmSymbols::java_lang_ArithmeticException()) {
       note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
     } else if (s == vmSymbols::java_lang_NullPointerException()) {
       note_trap(thread, Deoptimization::Reason_null_check, CHECK);
     }
   }
   // create exception
   Handle exception = Exceptions::new_exception(thread, s, message);
   thread->set_vm_result(exception());
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
   ResourceMark rm(thread);
   const char* klass_name = obj->klass()->external_name();
   // lookup exception klass
   TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
   if (ProfileTraps) {
     note_trap(thread, Deoptimization::Reason_class_check, CHECK);
   }
   // create exception, with klass name as detail message
   Handle exception = Exceptions::new_exception(thread, s, klass_name);
   thread->set_vm_result(exception());
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
   char message[jintAsStringSize];
   // lookup exception klass
   TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
   if (ProfileTraps) {
     note_trap(thread, Deoptimization::Reason_range_check, CHECK);
   }
   // create exception
   sprintf(message, "%d", index);
   THROW_MSG(s, message);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
   JavaThread* thread, oopDesc* obj))
   ResourceMark rm(thread);
   char* message = SharedRuntime::generate_class_cast_message(
     thread, obj->klass()->external_name());
   if (ProfileTraps) {
     note_trap(thread, Deoptimization::Reason_class_check, CHECK);
   }
   // create exception
   THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
 IRT_END
 // exception_handler_for_exception(...) returns the continuation address,
 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
 // The exception oop is returned to make sure it is preserved over GC (it
 // is only on the stack if the exception was thrown explicitly via athrow).
 // During this operation, the expression stack contains the values for the
 // bci where the exception happened. If the exception was propagated back
 // from a call, the expression stack contains the values for the bci at the
 // invoke w/o arguments (i.e., as if one were inside the call).
 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
   Handle             h_exception(thread, exception);
   methodHandle       h_method   (thread, method(thread));
   constantPoolHandle h_constants(thread, h_method->constants());
   bool               should_repeat;
   int                handler_bci;
   int                current_bci = bci(thread);
   if (thread->frames_to_pop_failed_realloc() > 0) {
     // Allocation of scalar replaced object used in this frame
     // failed. Unconditionally pop the frame.
     thread->dec_frames_to_pop_failed_realloc();
     thread->set_vm_result(h_exception());
     // If the method is synchronized we already unlocked the monitor
     // during deoptimization so the interpreter needs to skip it when
     // the frame is popped.
     thread->set_do_not_unlock_if_synchronized(true);
 #ifdef CC_INTERP
     return (address) -1;
 #else
     return Interpreter::remove_activation_entry();
 #endif
   }
   // Need to do this check first since when _do_not_unlock_if_synchronized
   // is set, we don't want to trigger any classloading which may make calls
   // into java, or surprisingly find a matching exception handler for bci 0
   // since at this moment the method hasn't been "officially" entered yet.
   if (thread->do_not_unlock_if_synchronized()) {
     ResourceMark rm;
     assert(current_bci == 0,  "bci isn't zero for do_not_unlock_if_synchronized");
     thread->set_vm_result(exception);
 #ifdef CC_INTERP
     return (address) -1;
 #else
     return Interpreter::remove_activation_entry();
 #endif
   }
   do {
     should_repeat = false;
     // assertions
 #ifdef ASSERT
     assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
     assert(h_exception->is_oop(), "just checking");
     // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
     if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
       if (ExitVMOnVerifyError) vm_exit(-1);
       ShouldNotReachHere();
     }
 #endif
     // tracing
     if (TraceExceptions) {
       ttyLocker ttyl;
       ResourceMark rm(thread);
       tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
       tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
       tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
     }
 // Don't go paging in something which won't be used.
 //     else if (extable->length() == 0) {
 //       // disabled for now - interpreter is not using shortcut yet
 //       // (shortcut is not to call runtime if we have no exception handlers)
 //       // warning("performance bug: should not call runtime if method has no exception handlers");
 //     }
     // for AbortVMOnException flag
     NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
     // exception handler lookup
     KlassHandle h_klass(THREAD, h_exception->klass());
     handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
     if (HAS_PENDING_EXCEPTION) {
       // We threw an exception while trying to find the exception handler.
       // Transfer the new exception to the exception handle which will
       // be set into thread local storage, and do another lookup for an
       // exception handler for this exception, this time starting at the
       // BCI of the exception handler which caused the exception to be
       // thrown (bug 4307310).
       h_exception = Handle(THREAD, PENDING_EXCEPTION);
       CLEAR_PENDING_EXCEPTION;
       if (handler_bci >= 0) {
         current_bci = handler_bci;
         should_repeat = true;
       }
     }
   } while (should_repeat == true);
   // notify JVMTI of an exception throw; JVMTI will detect if this is a first
   // time throw or a stack unwinding throw and accordingly notify the debugger
   if (JvmtiExport::can_post_on_exceptions()) {
     JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
   }
 #ifdef CC_INTERP
   address continuation = (address)(intptr_t) handler_bci;
 #else
   address continuation = NULL;
 #endif
   address handler_pc = NULL;
   if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
     // Forward exception to callee (leaving bci/bcp untouched) because (a) no
     // handler in this method, or (b) after a stack overflow there is not yet
     // enough stack space available to reprotect the stack.
 #ifndef CC_INTERP
     continuation = Interpreter::remove_activation_entry();
 #endif
     // Count this for compilation purposes
     h_method->interpreter_throwout_increment(THREAD);
   } else {
     // handler in this method => change bci/bcp to handler bci/bcp and continue there
     handler_pc = h_method->code_base() + handler_bci;
 #ifndef CC_INTERP
     set_bcp_and_mdp(handler_pc, thread);
     continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
 #endif
   }
   // notify debugger of an exception catch
   // (this is good for exceptions caught in native methods as well)
   if (JvmtiExport::can_post_on_exceptions()) {
     JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
   }
   thread->set_vm_result(h_exception());
   return continuation;
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
   assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
   // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
   THROW(vmSymbols::java_lang_AbstractMethodError());
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
   THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
 IRT_END
 //------------------------------------------------------------------------------------------------------------------------
 // Fields
 //
 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
   // resolve field
   fieldDescriptor info;
   constantPoolHandle pool(thread, method(thread)->constants());
   bool is_put    = (bytecode == Bytecodes::_putfield  || bytecode == Bytecodes::_putstatic);
   bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
   {
     JvmtiHideSingleStepping jhss(thread);
     LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
                                        bytecode, CHECK);
   } // end JvmtiHideSingleStepping
   // check if link resolution caused cpCache to be updated
   if (already_resolved(thread)) return;
   // compute auxiliary field attributes
   TosState state  = as_TosState(info.field_type());
   // We need to delay resolving put instructions on final fields
   // until we actually invoke one. This is required so we throw
   // exceptions at the correct place. If we do not resolve completely
   // in the current pass, leaving the put_code set to zero will
   // cause the next put instruction to reresolve.
   Bytecodes::Code put_code = (Bytecodes::Code)0;
   // We also need to delay resolving getstatic instructions until the
   // class is intitialized.  This is required so that access to the static
   // field will call the initialization function every time until the class
   // is completely initialized ala. in 2.17.5 in JVM Specification.
   InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
   bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
                                !klass->is_initialized());
   Bytecodes::Code get_code = (Bytecodes::Code)0;
   if (!uninitialized_static) {
     get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
     if (is_put || !info.access_flags().is_final()) {
       put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
     }
   }
   cache_entry(thread)->set_field(
     get_code,
     put_code,
     info.field_holder(),
     info.index(),
     info.offset(),
     state,
     info.access_flags().is_final(),
     info.access_flags().is_volatile(),
     pool->pool_holder()
   );
 IRT_END
 //------------------------------------------------------------------------------------------------------------------------
 // Synchronization
 //
 // The interpreter's synchronization code is factored out so that it can
 // be shared by method invocation and synchronized blocks.
 //%note synchronization_3
 //%note monitor_1
 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
 #ifdef ASSERT
   thread->last_frame().interpreter_frame_verify_monitor(elem);
 #endif
   if (PrintBiasedLockingStatistics) {
     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
   }
   Handle h_obj(thread, elem->obj());
   assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
          "must be NULL or an object");
   if (UseBiasedLocking) {
     // Retry fast entry if bias is revoked to avoid unnecessary inflation
     ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
   } else {
     ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
   }
   assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
          "must be NULL or an object");
 #ifdef ASSERT
   thread->last_frame().interpreter_frame_verify_monitor(elem);
 #endif
 IRT_END
 //%note monitor_1
 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
 #ifdef ASSERT
   thread->last_frame().interpreter_frame_verify_monitor(elem);
 #endif
   Handle h_obj(thread, elem->obj());
   assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
          "must be NULL or an object");
   if (elem == NULL || h_obj()->is_unlocked()) {
     THROW(vmSymbols::java_lang_IllegalMonitorStateException());
   }
   ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
   // Free entry. This must be done here, since a pending exception might be installed on
   // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
   elem->set_obj(NULL);
 #ifdef ASSERT
   thread->last_frame().interpreter_frame_verify_monitor(elem);
 #endif
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
   THROW(vmSymbols::java_lang_IllegalMonitorStateException());
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
   // Returns an illegal exception to install into the current thread. The
   // pending_exception flag is cleared so normal exception handling does not
   // trigger. Any current installed exception will be overwritten. This
   // method will be called during an exception unwind.
   assert(!HAS_PENDING_EXCEPTION, "no pending exception");
   Handle exception(thread, thread->vm_result());
   assert(exception() != NULL, "vm result should be set");
   thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
   if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
     exception = get_preinitialized_exception(
                        SystemDictionary::IllegalMonitorStateException_klass(),
                        CATCH);
   }
   thread->set_vm_result(exception());
 IRT_END
 //------------------------------------------------------------------------------------------------------------------------
 // Invokes
 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
   return method->orig_bytecode_at(method->bci_from(bcp));
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
   method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
   JvmtiExport::post_raw_breakpoint(thread, method, bcp);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
   // extract receiver from the outgoing argument list if necessary
   Handle receiver(thread, NULL);
   if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
       bytecode == Bytecodes::_invokespecial) {
     ResourceMark rm(thread);
     methodHandle m (thread, method(thread));
     Bytecode_invoke call(m, bci(thread));
     Symbol* signature = call.signature();
     receiver = Handle(thread,
                   thread->last_frame().interpreter_callee_receiver(signature));
     assert(Universe::heap()->is_in_reserved_or_null(receiver()),
            "sanity check");
     assert(receiver.is_null() ||
            !Universe::heap()->is_in_reserved(receiver->klass()),
            "sanity check");
   }
   // resolve method
   CallInfo info;
   constantPoolHandle pool(thread, method(thread)->constants());
   {
     JvmtiHideSingleStepping jhss(thread);
     LinkResolver::resolve_invoke(info, receiver, pool,
                                  get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
     if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
       int retry_count = 0;
       while (info.resolved_method()->is_old()) {
         // It is very unlikely that method is redefined more than 100 times
         // in the middle of resolve. If it is looping here more than 100 times
         // means then there could be a bug here.
         guarantee((retry_count++ < 100),
                   "Could not resolve to latest version of redefined method");
         // method is redefined in the middle of resolve so re-try.
         LinkResolver::resolve_invoke(info, receiver, pool,
                                      get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
       }
     }
   } // end JvmtiHideSingleStepping
   // check if link resolution caused cpCache to be updated
   if (already_resolved(thread)) return;
   if (bytecode == Bytecodes::_invokeinterface) {
     if (TraceItables && Verbose) {
       ResourceMark rm(thread);
       tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
     }
   }
 #ifdef ASSERT
   if (bytecode == Bytecodes::_invokeinterface) {
     if (info.resolved_method()->method_holder() ==
                                             SystemDictionary::Object_klass()) {
       // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
       // (see also CallInfo::set_interface for details)
       assert(info.call_kind() == CallInfo::vtable_call ||
              info.call_kind() == CallInfo::direct_call, "");
       methodHandle rm = info.resolved_method();
       assert(rm->is_final() || info.has_vtable_index(),
              "should have been set already");
     } else if (!info.resolved_method()->has_itable_index()) {
       // Resolved something like CharSequence.toString.  Use vtable not itable.
       assert(info.call_kind() != CallInfo::itable_call, "");
     } else {
       // Setup itable entry
       assert(info.call_kind() == CallInfo::itable_call, "");
       int index = info.resolved_method()->itable_index();
       assert(info.itable_index() == index, "");
     }
   } else if (bytecode == Bytecodes::_invokespecial) {
     assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
   } else {
     assert(info.call_kind() == CallInfo::direct_call ||
            info.call_kind() == CallInfo::vtable_call, "");
   }
 #endif
   // Get sender or sender's host_klass, and only set cpCache entry to resolved if
   // it is not an interface.  The receiver for invokespecial calls within interface
   // methods must be checked for every call.
   InstanceKlass* sender = pool->pool_holder();
   sender = sender->has_host_klass() ? InstanceKlass::cast(sender->host_klass()) : sender;
   switch (info.call_kind()) {
   case CallInfo::direct_call:
     cache_entry(thread)->set_direct_call(
       bytecode,
       info.resolved_method(),
       sender->is_interface());
     break;
   case CallInfo::vtable_call:
     cache_entry(thread)->set_vtable_call(
       bytecode,
       info.resolved_method(),
       info.vtable_index());
     break;
   case CallInfo::itable_call:
     cache_entry(thread)->set_itable_call(
       bytecode,
       info.resolved_klass(),
       info.resolved_method(),
       info.itable_index());
     break;
   default:  ShouldNotReachHere();
   }
 }
 IRT_END
 // First time execution:  Resolve symbols, create a permanent MethodType object.
 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
   assert(EnableInvokeDynamic, "");
   const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
   // resolve method
   CallInfo info;
   constantPoolHandle pool(thread, method(thread)->constants());
   {
     JvmtiHideSingleStepping jhss(thread);
     LinkResolver::resolve_invoke(info, Handle(), pool,
                                  get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
   } // end JvmtiHideSingleStepping
   cache_entry(thread)->set_method_handle(pool, info);
 }
 IRT_END
 // First time execution:  Resolve symbols, create a permanent CallSite object.
 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
   assert(EnableInvokeDynamic, "");
   const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
   //TO DO: consider passing BCI to Java.
   //  int caller_bci = method(thread)->bci_from(bcp(thread));
   // resolve method
   CallInfo info;
   constantPoolHandle pool(thread, method(thread)->constants());
   int index = get_index_u4(thread, bytecode);
   {
     JvmtiHideSingleStepping jhss(thread);
     LinkResolver::resolve_invoke(info, Handle(), pool,
                                  index, bytecode, CHECK);
   } // end JvmtiHideSingleStepping
   ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
   cp_cache_entry->set_dynamic_call(pool, info);
 }
 IRT_END
 //------------------------------------------------------------------------------------------------------------------------
 // Miscellaneous
 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
   nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
   assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
   if (branch_bcp != NULL && nm != NULL) {
     // This was a successful request for an OSR nmethod.  Because
     // frequency_counter_overflow_inner ends with a safepoint check,
     // nm could have been unloaded so look it up again.  It's unsafe
     // to examine nm directly since it might have been freed and used
     // for something else.
     frame fr = thread->last_frame();
     Method* method =  fr.interpreter_frame_method();
     int bci = method->bci_from(fr.interpreter_frame_bcp());
     nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
   }
 #ifndef PRODUCT
   if (TraceOnStackReplacement) {
     if (nm != NULL) {
       tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
       nm->print();
     }
   }
 #endif
   return nm;
 }
 IRT_ENTRY(nmethod*,
           InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
   // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
   // flag, in case this method triggers classloading which will call into Java.
   UnlockFlagSaver fs(thread);
   frame fr = thread->last_frame();
   assert(fr.is_interpreted_frame(), "must come from interpreter");
   methodHandle method(thread, fr.interpreter_frame_method());
   const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
   const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
   assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
   nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
   assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
   if (osr_nm != NULL) {
     // We may need to do on-stack replacement which requires that no
     // monitors in the activation are biased because their
     // BasicObjectLocks will need to migrate during OSR. Force
     // unbiasing of all monitors in the activation now (even though
     // the OSR nmethod might be invalidated) because we don't have a
     // safepoint opportunity later once the migration begins.
     if (UseBiasedLocking) {
       ResourceMark rm;
       GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
       for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
            kptr < fr.interpreter_frame_monitor_begin();
            kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
         if( kptr->obj() != NULL ) {
           objects_to_revoke->append(Handle(THREAD, kptr->obj()));
         }
       }
       BiasedLocking::revoke(objects_to_revoke);
     }
   }
   return osr_nm;
 IRT_END
 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
   assert(ProfileInterpreter, "must be profiling interpreter");
   int bci = method->bci_from(cur_bcp);
   MethodData* mdo = method->method_data();
   if (mdo == NULL)  return 0;
   return mdo->bci_to_di(bci);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
   // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
   // flag, in case this method triggers classloading which will call into Java.
   UnlockFlagSaver fs(thread);
   assert(ProfileInterpreter, "must be profiling interpreter");
   frame fr = thread->last_frame();
   assert(fr.is_interpreted_frame(), "must come from interpreter");
   methodHandle method(thread, fr.interpreter_frame_method());
   Method::build_interpreter_method_data(method, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
     CLEAR_PENDING_EXCEPTION;
     // and fall through...
   }
 IRT_END
 #ifdef ASSERT
 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
   assert(ProfileInterpreter, "must be profiling interpreter");
   MethodData* mdo = method->method_data();
   assert(mdo != NULL, "must not be null");
   int bci = method->bci_from(bcp);
   address mdp2 = mdo->bci_to_dp(bci);
   if (mdp != mdp2) {
     ResourceMark rm;
     ResetNoHandleMark rnm; // In a LEAF entry.
     HandleMark hm;
     tty->print_cr("FAILED verify : actual mdp %p   expected mdp %p @ bci %d", mdp, mdp2, bci);
     int current_di = mdo->dp_to_di(mdp);
     int expected_di  = mdo->dp_to_di(mdp2);
     tty->print_cr("  actual di %d   expected di %d", current_di, expected_di);
     int expected_approx_bci = mdo->data_at(expected_di)->bci();
     int approx_bci = -1;
     if (current_di >= 0) {
       approx_bci = mdo->data_at(current_di)->bci();
     }
     tty->print_cr("  actual bci is %d  expected bci %d", approx_bci, expected_approx_bci);
     mdo->print_on(tty);
     method->print_codes();
   }
   assert(mdp == mdp2, "wrong mdp");
 IRT_END
 #endif // ASSERT
 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
   assert(ProfileInterpreter, "must be profiling interpreter");
   ResourceMark rm(thread);
   HandleMark hm(thread);
   frame fr = thread->last_frame();
   assert(fr.is_interpreted_frame(), "must come from interpreter");
   MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
   // Grab a lock to ensure atomic access to setting the return bci and
   // the displacement.  This can block and GC, invalidating all naked oops.
   MutexLocker ml(RetData_lock);
   // ProfileData is essentially a wrapper around a derived oop, so we
   // need to take the lock before making any ProfileData structures.
   ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
   RetData* rdata = data->as_RetData();
   address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
   fr.interpreter_frame_set_mdp(new_mdp);
 IRT_END
 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
   MethodCounters* mcs = Method::build_method_counters(m, thread);
   if (HAS_PENDING_EXCEPTION) {
     assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
     CLEAR_PENDING_EXCEPTION;
   }
   return mcs;
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
   // We used to need an explict preserve_arguments here for invoke bytecodes. However,
   // stack traversal automatically takes care of preserving arguments for invoke, so
   // this is no longer needed.
   // IRT_END does an implicit safepoint check, hence we are guaranteed to block
   // if this is called during a safepoint
   if (JvmtiExport::should_post_single_step()) {
     // We are called during regular safepoints and when the VM is
     // single stepping. If any thread is marked for single stepping,
     // then we may have JVMTI work to do.
     JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
   }
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
 ConstantPoolCacheEntry *cp_entry))
   // check the access_flags for the field in the klass
   InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
   int index = cp_entry->field_index();
   if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
   switch(cp_entry->flag_state()) {
     case btos:    // fall through
     case ztos:    // fall through
     case ctos:    // fall through
     case stos:    // fall through
     case itos:    // fall through
     case ftos:    // fall through
     case ltos:    // fall through
     case dtos:    // fall through
     case atos: break;
     default: ShouldNotReachHere(); return;
   }
   bool is_static = (obj == NULL);
   HandleMark hm(thread);
   Handle h_obj;
   if (!is_static) {
     // non-static field accessors have an object, but we need a handle
     h_obj = Handle(thread, obj);
   }
   instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
   jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
   JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
   oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
   Klass* k = (Klass*)cp_entry->f1_as_klass();
   // check the access_flags for the field in the klass
   InstanceKlass* ik = InstanceKlass::cast(k);
   int index = cp_entry->field_index();
   // bail out if field modifications are not watched
   if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
   char sig_type = '\0';
   switch(cp_entry->flag_state()) {
     case btos: sig_type = 'B'; break;
     case ztos: sig_type = 'Z'; break;
     case ctos: sig_type = 'C'; break;
     case stos: sig_type = 'S'; break;
     case itos: sig_type = 'I'; break;
     case ftos: sig_type = 'F'; break;
     case atos: sig_type = 'L'; break;
     case ltos: sig_type = 'J'; break;
     case dtos: sig_type = 'D'; break;
     default:  ShouldNotReachHere(); return;
   }
   bool is_static = (obj == NULL);
   HandleMark hm(thread);
   instanceKlassHandle h_klass(thread, k);
   jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
   jvalue fvalue;
 #ifdef _LP64
   fvalue = *value;
 #else
   // Long/double values are stored unaligned and also noncontiguously with
   // tagged stacks.  We can't just do a simple assignment even in the non-
   // J/D cases because a C++ compiler is allowed to assume that a jvalue is
   // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
   // We assume that the two halves of longs/doubles are stored in interpreter
   // stack slots in platform-endian order.
   jlong_accessor u;
   jint* newval = (jint*)value;
   u.words[0] = newval[0];
   u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
   fvalue.j = u.long_value;
 #endif // _LP64
   Handle h_obj;
   if (!is_static) {
     // non-static field accessors have an object, but we need a handle
     h_obj = Handle(thread, obj);
   }
   JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
                                            fid, sig_type, &fvalue);
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
   JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
 IRT_END
 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
   JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
 IRT_END
 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
 {
   return (Interpreter::contains(pc) ? 1 : 0);
 }
 IRT_END
 // Implementation of SignatureHandlerLibrary
 address SignatureHandlerLibrary::set_handler_blob() {
   BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
   if (handler_blob == NULL) {
     return NULL;
   }
   address handler = handler_blob->code_begin();
   _handler_blob = handler_blob;
   _handler = handler;
   return handler;
 }
 void SignatureHandlerLibrary::initialize() {
   if (_fingerprints != NULL) {
     return;
   }
   if (set_handler_blob() == NULL) {
     vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
   }
   BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
                                       SignatureHandlerLibrary::buffer_size);
   _buffer = bb->code_begin();
   _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
   _handlers     = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
 }
 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
   address handler   = _handler;
   int     insts_size = buffer->pure_insts_size();
   if (handler + insts_size > _handler_blob->code_end()) {
     // get a new handler blob
     handler = set_handler_blob();
   }
   if (handler != NULL) {
     memcpy(handler, buffer->insts_begin(), insts_size);
     pd_set_handler(handler);
     ICache::invalidate_range(handler, insts_size);
     _handler = handler + insts_size;
   }
   return handler;
 }
 void SignatureHandlerLibrary::add(methodHandle method) {
   if (method->signature_handler() == NULL) {
     // use slow signature handler if we can't do better
     int handler_index = -1;
     // check if we can use customized (fast) signature handler
     if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
       // use customized signature handler
       MutexLocker mu(SignatureHandlerLibrary_lock);
       // make sure data structure is initialized
       initialize();
       // lookup method signature's fingerprint
       uint64_t fingerprint = Fingerprinter(method).fingerprint();
       handler_index = _fingerprints->find(fingerprint);
       // create handler if necessary
       if (handler_index < 0) {
         ResourceMark rm;
         ptrdiff_t align_offset = (address)
           round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
         CodeBuffer buffer((address)(_buffer + align_offset),
                           SignatureHandlerLibrary::buffer_size - align_offset);
         InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
         // copy into code heap
         address handler = set_handler(&buffer);
         if (handler == NULL) {
           // use slow signature handler
         } else {
           // debugging suppport
           if (PrintSignatureHandlers) {
             tty->cr();
             tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
                           _handlers->length(),
                           (method->is_static() ? "static" : "receiver"),
                           method->name_and_sig_as_C_string(),
                           fingerprint,
                           buffer.insts_size());
             Disassembler::decode(handler, handler + buffer.insts_size());
 #ifndef PRODUCT
             tty->print_cr(" --- associated result handler ---");
             address rh_begin = Interpreter::result_handler(method()->result_type());
             address rh_end = rh_begin;
             while (*(int*)rh_end != 0) {
               rh_end += sizeof(int);
             }
             Disassembler::decode(rh_begin, rh_end);
 #endif
           }
           // add handler to library
           _fingerprints->append(fingerprint);
           _handlers->append(handler);
           // set handler index
           assert(_fingerprints->length() == _handlers->length(), "sanity check");
           handler_index = _fingerprints->length() - 1;
         }
       }
       // Set handler under SignatureHandlerLibrary_lock
     if (handler_index < 0) {
       // use generic signature handler
       method->set_signature_handler(Interpreter::slow_signature_handler());
     } else {
       // set handler
       method->set_signature_handler(_handlers->at(handler_index));
     }
     } else {
       CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
       // use generic signature handler
       method->set_signature_handler(Interpreter::slow_signature_handler());
     }
   }
 #ifdef ASSERT
   int handler_index = -1;
   int fingerprint_index = -2;
   {
     // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
     // in any way if accessed from multiple threads. To avoid races with another
     // thread which may change the arrays in the above, mutex protected block, we
     // have to protect this read access here with the same mutex as well!
     MutexLocker mu(SignatureHandlerLibrary_lock);
     if (_handlers != NULL) {
     handler_index = _handlers->find(method->signature_handler());
     fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
   }
   }
   assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
          handler_index == fingerprint_index, "sanity check");
 #endif // ASSERT
 }
 BufferBlob*              SignatureHandlerLibrary::_handler_blob = NULL;
 address                  SignatureHandlerLibrary::_handler      = NULL;
 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
 GrowableArray<address>*  SignatureHandlerLibrary::_handlers     = NULL;
 address                  SignatureHandlerLibrary::_buffer       = NULL;
 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
   methodHandle m(thread, method);
   assert(m->is_native(), "sanity check");
   // lookup native function entry point if it doesn't exist
   bool in_base_library;
   if (!m->has_native_function()) {
     NativeLookup::lookup(m, in_base_library, CHECK);
   }
   // make sure signature handler is installed
   SignatureHandlerLibrary::add(m);
   // The interpreter entry point checks the signature handler first,
   // before trying to fetch the native entry point and klass mirror.
   // We must set the signature handler last, so that multiple processors
   // preparing the same method will be sure to see non-null entry & mirror.
 IRT_END
 #if defined(IA32) || defined(AMD64) || defined(ARM)
 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
   if (src_address == dest_address) {
     return;
   }
   ResetNoHandleMark rnm; // In a LEAF entry.
   HandleMark hm;
   ResourceMark rm;
   frame fr = thread->last_frame();
   assert(fr.is_interpreted_frame(), "");
   jint bci = fr.interpreter_frame_bci();
   methodHandle mh(thread, fr.interpreter_frame_method());
   Bytecode_invoke invoke(mh, bci);
   ArgumentSizeComputer asc(invoke.signature());
   int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
   Copy::conjoint_jbytes(src_address, dest_address,
                        size_of_arguments * Interpreter::stackElementSize);
 IRT_END
 #endif
 #if INCLUDE_JVMTI
 // This is a support of the JVMTI PopFrame interface.
 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
 // The member_name argument is a saved reference (in local#0) to the member_name.
 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
                                                             Method* method, address bcp))
   Bytecodes::Code code = Bytecodes::code_at(method, bcp);
   if (code != Bytecodes::_invokestatic) {
     return;
   }
   ConstantPool* cpool = method->constants();
   int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
   Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
   Symbol* mname = cpool->name_ref_at(cp_index);
   if (MethodHandles::has_member_arg(cname, mname)) {
     oop member_name_oop = (oop) member_name;
     if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
       // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
       member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
     }
     thread->set_vm_result(member_name_oop);
   } else {
     thread->set_vm_result(NULL);
   }
 IRT_END
 #endif // INCLUDE_JVMTI

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/interpreterRuntime.cpp@f8a45a60bc6b (annotated)

src/share/vm/interpreter/interpreterRuntime.cpp