1 /* 2 * Copyright (c) 1997, 2012, 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 #ifndef SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP 26 #define SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP 27 28 #include "interpreter/abstractInterpreter.hpp" 29 #include "interpreter/templateTable.hpp" 30 31 // This file contains the platform-independent parts 32 // of the template interpreter and the template interpreter generator. 33 34 #ifndef CC_INTERP 35 36 //------------------------------------------------------------------------------------------------------------------------ 37 // A little wrapper class to group tosca-specific entry points into a unit. 38 // (tosca = Top-Of-Stack CAche) 39 40 class EntryPoint VALUE_OBJ_CLASS_SPEC { 41 private: 42 address _entry[number_of_states]; 43 44 public: 45 // Construction 46 EntryPoint(); 47 EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry); 48 49 // Attributes 50 address entry(TosState state) const; // return target address for a given tosca state 51 void set_entry(TosState state, address entry); // set target address for a given tosca state 52 void print(); 53 54 // Comparison 55 bool operator == (const EntryPoint& y); // for debugging only 56 }; 57 58 59 //------------------------------------------------------------------------------------------------------------------------ 60 // A little wrapper class to group tosca-specific dispatch tables into a unit. 61 62 class DispatchTable VALUE_OBJ_CLASS_SPEC { 63 public: 64 enum { length = 1 << BitsPerByte }; // an entry point for each byte value (also for undefined bytecodes) 65 66 private: 67 address _table[number_of_states][length]; // dispatch tables, indexed by tosca and bytecode 68 69 public: 70 // Attributes 71 EntryPoint entry(int i) const; // return entry point for a given bytecode i 72 void set_entry(int i, EntryPoint& entry); // set entry point for a given bytecode i 73 address* table_for(TosState state) { return _table[state]; } 74 address* table_for() { return table_for((TosState)0); } 75 int distance_from(address *table) { return table - table_for(); } 76 int distance_from(TosState state) { return distance_from(table_for(state)); } 77 78 // Comparison 79 bool operator == (DispatchTable& y); // for debugging only 80 }; 81 82 class TemplateInterpreter: public AbstractInterpreter { 83 friend class VMStructs; 84 friend class InterpreterMacroAssembler; 85 friend class TemplateInterpreterGenerator; 86 friend class InterpreterGenerator; 87 friend class TemplateTable; 88 // friend class Interpreter; 89 public: 90 91 enum MoreConstants { 92 number_of_return_entries = number_of_states, // number of return entry points 93 number_of_deopt_entries = number_of_states, // number of deoptimization entry points 94 number_of_return_addrs = number_of_states // number of return addresses 95 }; 96 97 protected: 98 99 static address _throw_ArrayIndexOutOfBoundsException_entry; 100 static address _throw_ArrayStoreException_entry; 101 static address _throw_ArithmeticException_entry; 102 static address _throw_ClassCastException_entry; 103 static address _throw_WrongMethodType_entry; 104 static address _throw_NullPointerException_entry; 105 static address _throw_exception_entry; 106 107 static address _throw_StackOverflowError_entry; 108 109 static address _remove_activation_entry; // continuation address if an exception is not handled by current frame 110 #ifdef HOTSWAP 111 static address _remove_activation_preserving_args_entry; // continuation address when current frame is being popped 112 #endif // HOTSWAP 113 114 #ifndef PRODUCT 115 static EntryPoint _trace_code; 116 #endif // !PRODUCT 117 static EntryPoint _return_entry[number_of_return_entries]; // entry points to return to from a call 118 static EntryPoint _earlyret_entry; // entry point to return early from a call 119 static EntryPoint _deopt_entry[number_of_deopt_entries]; // entry points to return to from a deoptimization 120 static EntryPoint _continuation_entry; 121 static EntryPoint _safept_entry; 122 123 static address _return_3_addrs_by_index[number_of_return_addrs]; // for invokevirtual return entries 124 static address _return_5_addrs_by_index[number_of_return_addrs]; // for invokeinterface return entries 125 126 static DispatchTable _active_table; // the active dispatch table (used by the interpreter for dispatch) 127 static DispatchTable _normal_table; // the normal dispatch table (used to set the active table in normal mode) 128 static DispatchTable _safept_table; // the safepoint dispatch table (used to set the active table for safepoints) 129 static address _wentry_point[DispatchTable::length]; // wide instructions only (vtos tosca always) 130 131 132 public: 133 // Initialization/debugging 134 static void initialize(); 135 // this only returns whether a pc is within generated code for the interpreter. 136 static bool contains(address pc) { return _code != NULL && _code->contains(pc); } 137 138 public: 139 140 static address remove_activation_early_entry(TosState state) { return _earlyret_entry.entry(state); } 141 #ifdef HOTSWAP 142 static address remove_activation_preserving_args_entry() { return _remove_activation_preserving_args_entry; } 143 #endif // HOTSWAP 144 145 static address remove_activation_entry() { return _remove_activation_entry; } 146 static address throw_exception_entry() { return _throw_exception_entry; } 147 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; } 148 static address throw_WrongMethodType_entry() { return _throw_WrongMethodType_entry; } 149 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; } 150 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; } 151 152 // Code generation 153 #ifndef PRODUCT 154 static address trace_code (TosState state) { return _trace_code.entry(state); } 155 #endif // !PRODUCT 156 static address continuation (TosState state) { return _continuation_entry.entry(state); } 157 static address* dispatch_table(TosState state) { return _active_table.table_for(state); } 158 static address* dispatch_table() { return _active_table.table_for(); } 159 static int distance_from_dispatch_table(TosState state){ return _active_table.distance_from(state); } 160 static address* normal_table(TosState state) { return _normal_table.table_for(state); } 161 static address* normal_table() { return _normal_table.table_for(); } 162 163 // Support for invokes 164 static address* return_3_addrs_by_index_table() { return _return_3_addrs_by_index; } 165 static address* return_5_addrs_by_index_table() { return _return_5_addrs_by_index; } 166 static int TosState_as_index(TosState state); // computes index into return_3_entry_by_index table 167 168 static address return_entry (TosState state, int length); 169 static address deopt_entry (TosState state, int length); 170 171 // Safepoint support 172 static void notice_safepoints(); // stops the thread when reaching a safepoint 173 static void ignore_safepoints(); // ignores safepoints 174 175 // Deoptimization support 176 // Compute the entry address for continuation after 177 static address deopt_continue_after_entry(Method* method, 178 address bcp, 179 int callee_parameters, 180 bool is_top_frame); 181 // Deoptimization should reexecute this bytecode 182 static bool bytecode_should_reexecute(Bytecodes::Code code); 183 // Compute the address for reexecution 184 static address deopt_reexecute_entry(Method* method, address bcp); 185 186 #ifdef TARGET_ARCH_x86 187 # include "templateInterpreter_x86.hpp" 188 #endif 189 #ifdef TARGET_ARCH_sparc 190 # include "templateInterpreter_sparc.hpp" 191 #endif 192 #ifdef TARGET_ARCH_zero 193 # include "templateInterpreter_zero.hpp" 194 #endif 195 #ifdef TARGET_ARCH_arm 196 # include "templateInterpreter_arm.hpp" 197 #endif 198 #ifdef TARGET_ARCH_ppc 199 # include "templateInterpreter_ppc.hpp" 200 #endif 201 202 203 }; 204 205 #endif // !CC_INTERP 206 207 #endif // SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP