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hotspot/src/share/vm/interpreter/templateInterpreter.hpp
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177
hotspot/src/share/vm/interpreter/templateInterpreter.hpp
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/*
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* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// This file contains the platform-independant parts
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// of the template interpreter and the template interpreter generator.
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#ifndef CC_INTERP
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//------------------------------------------------------------------------------------------------------------------------
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// A little wrapper class to group tosca-specific entry points into a unit.
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// (tosca = Top-Of-Stack CAche)
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class EntryPoint VALUE_OBJ_CLASS_SPEC {
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private:
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address _entry[number_of_states];
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public:
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// Construction
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EntryPoint();
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EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry);
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// Attributes
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address entry(TosState state) const; // return target address for a given tosca state
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void set_entry(TosState state, address entry); // set target address for a given tosca state
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void print();
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// Comparison
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bool operator == (const EntryPoint& y); // for debugging only
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};
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//------------------------------------------------------------------------------------------------------------------------
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// A little wrapper class to group tosca-specific dispatch tables into a unit.
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class DispatchTable VALUE_OBJ_CLASS_SPEC {
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public:
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enum { length = 1 << BitsPerByte }; // an entry point for each byte value (also for undefined bytecodes)
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private:
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address _table[number_of_states][length]; // dispatch tables, indexed by tosca and bytecode
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public:
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// Attributes
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EntryPoint entry(int i) const; // return entry point for a given bytecode i
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void set_entry(int i, EntryPoint& entry); // set entry point for a given bytecode i
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address* table_for(TosState state) { return _table[state]; }
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address* table_for() { return table_for((TosState)0); }
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int distance_from(address *table) { return table - table_for(); }
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int distance_from(TosState state) { return distance_from(table_for(state)); }
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// Comparison
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bool operator == (DispatchTable& y); // for debugging only
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};
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class TemplateInterpreter: public AbstractInterpreter {
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friend class VMStructs;
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friend class InterpreterMacroAssembler;
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friend class TemplateInterpreterGenerator;
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friend class TemplateTable;
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// friend class Interpreter;
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public:
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enum MoreConstants {
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number_of_return_entries = 9, // number of return entry points
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number_of_deopt_entries = 9, // number of deoptimization entry points
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number_of_return_addrs = 9 // number of return addresses
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};
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protected:
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static address _throw_ArrayIndexOutOfBoundsException_entry;
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static address _throw_ArrayStoreException_entry;
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static address _throw_ArithmeticException_entry;
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static address _throw_ClassCastException_entry;
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static address _throw_NullPointerException_entry;
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static address _throw_exception_entry;
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static address _throw_StackOverflowError_entry;
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static address _remove_activation_entry; // continuation address if an exception is not handled by current frame
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#ifdef HOTSWAP
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static address _remove_activation_preserving_args_entry; // continuation address when current frame is being popped
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#endif // HOTSWAP
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#ifndef PRODUCT
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static EntryPoint _trace_code;
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#endif // !PRODUCT
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static EntryPoint _return_entry[number_of_return_entries]; // entry points to return to from a call
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static EntryPoint _earlyret_entry; // entry point to return early from a call
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static EntryPoint _deopt_entry[number_of_deopt_entries]; // entry points to return to from a deoptimization
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static EntryPoint _continuation_entry;
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static EntryPoint _safept_entry;
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static address _return_3_addrs_by_index[number_of_return_addrs]; // for invokevirtual return entries
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static address _return_5_addrs_by_index[number_of_return_addrs]; // for invokeinterface return entries
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static DispatchTable _active_table; // the active dispatch table (used by the interpreter for dispatch)
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static DispatchTable _normal_table; // the normal dispatch table (used to set the active table in normal mode)
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static DispatchTable _safept_table; // the safepoint dispatch table (used to set the active table for safepoints)
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static address _wentry_point[DispatchTable::length]; // wide instructions only (vtos tosca always)
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public:
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// Initialization/debugging
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static void initialize();
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// this only returns whether a pc is within generated code for the interpreter.
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static bool contains(address pc) { return _code != NULL && _code->contains(pc); }
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public:
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static address remove_activation_early_entry(TosState state) { return _earlyret_entry.entry(state); }
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#ifdef HOTSWAP
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static address remove_activation_preserving_args_entry() { return _remove_activation_preserving_args_entry; }
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#endif // HOTSWAP
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static address remove_activation_entry() { return _remove_activation_entry; }
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static address throw_exception_entry() { return _throw_exception_entry; }
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static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
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static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
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static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
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// Code generation
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#ifndef PRODUCT
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static address trace_code (TosState state) { return _trace_code.entry(state); }
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#endif // !PRODUCT
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static address continuation (TosState state) { return _continuation_entry.entry(state); }
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static address* dispatch_table(TosState state) { return _active_table.table_for(state); }
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static address* dispatch_table() { return _active_table.table_for(); }
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static int distance_from_dispatch_table(TosState state){ return _active_table.distance_from(state); }
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static address* normal_table(TosState state) { return _normal_table.table_for(state); }
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static address* normal_table() { return _normal_table.table_for(); }
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// Support for invokes
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static address* return_3_addrs_by_index_table() { return _return_3_addrs_by_index; }
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static address* return_5_addrs_by_index_table() { return _return_5_addrs_by_index; }
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static int TosState_as_index(TosState state); // computes index into return_3_entry_by_index table
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static address return_entry (TosState state, int length);
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static address deopt_entry (TosState state, int length);
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// Safepoint support
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static void notice_safepoints(); // stops the thread when reaching a safepoint
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static void ignore_safepoints(); // ignores safepoints
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// Deoptimization support
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static address continuation_for(methodOop method,
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address bcp,
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int callee_parameters,
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bool is_top_frame,
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bool& use_next_mdp);
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#include "incls/_templateInterpreter_pd.hpp.incl"
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};
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#endif // !CC_INTERP
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