1 /* 2 * Copyright (c) 1997, 2014, 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 class InterpreterMacroAssembler; 37 38 //------------------------------------------------------------------------------------------------------------------------ 39 // A little wrapper class to group tosca-specific entry points into a unit. 40 // (tosca = Top-Of-Stack CAche) 41 42 class EntryPoint VALUE_OBJ_CLASS_SPEC { 43 private: 44 address _entry[number_of_states]; 45 46 public: 47 // Construction 48 EntryPoint(); 49 EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry); 50 51 // Attributes 52 address entry(TosState state) const; // return target address for a given tosca state 53 void set_entry(TosState state, address entry); // set target address for a given tosca state 54 void print(); 55 56 // Comparison 57 bool operator == (const EntryPoint& y); // for debugging only 58 }; 59 60 61 //------------------------------------------------------------------------------------------------------------------------ 62 // A little wrapper class to group tosca-specific dispatch tables into a unit. 63 64 class DispatchTable VALUE_OBJ_CLASS_SPEC { 65 public: 66 enum { length = 1 << BitsPerByte }; // an entry point for each byte value (also for undefined bytecodes) 67 68 private: 69 address _table[number_of_states][length]; // dispatch tables, indexed by tosca and bytecode 70 71 public: 72 // Attributes 73 EntryPoint entry(int i) const; // return entry point for a given bytecode i 74 void set_entry(int i, EntryPoint& entry); // set entry point for a given bytecode i 75 address* table_for(TosState state) { return _table[state]; } 76 address* table_for() { return table_for((TosState)0); } 77 int distance_from(address *table) { return table - table_for(); } 78 int distance_from(TosState state) { return distance_from(table_for(state)); } 79 80 // Comparison 81 bool operator == (DispatchTable& y); // for debugging only 82 }; 83 84 class TemplateInterpreter: public AbstractInterpreter { 85 friend class VMStructs; 86 friend class InterpreterMacroAssembler; 87 friend class TemplateInterpreterGenerator; 88 friend class InterpreterGenerator; 89 friend class TemplateTable; 90 // friend class Interpreter; 91 public: 92 93 enum MoreConstants { 94 number_of_return_entries = number_of_states, // number of return entry points 95 number_of_deopt_entries = number_of_states, // number of deoptimization entry points 96 number_of_return_addrs = number_of_states // number of return addresses 97 }; 98 99 protected: 100 101 static address _throw_ArrayIndexOutOfBoundsException_entry; 102 static address _throw_ArrayStoreException_entry; 103 static address _throw_ArithmeticException_entry; 104 static address _throw_ClassCastException_entry; 105 static address _throw_WrongMethodType_entry; 106 static address _throw_NullPointerException_entry; 107 static address _throw_exception_entry; 108 109 static address _throw_StackOverflowError_entry; 110 111 static address _remove_activation_entry; // continuation address if an exception is not handled by current frame 112 #ifdef HOTSWAP 113 static address _remove_activation_preserving_args_entry; // continuation address when current frame is being popped 114 #endif // HOTSWAP 115 116 #ifndef PRODUCT 117 static EntryPoint _trace_code; 118 #endif // !PRODUCT 119 static EntryPoint _return_entry[number_of_return_entries]; // entry points to return to from a call 120 static EntryPoint _earlyret_entry; // entry point to return early from a call 121 static EntryPoint _deopt_entry[number_of_deopt_entries]; // entry points to return to from a deoptimization 122 static EntryPoint _continuation_entry; 123 static EntryPoint _safept_entry; 124 125 static address _invoke_return_entry[number_of_return_addrs]; // for invokestatic, invokespecial, invokevirtual return entries 126 static address _invokeinterface_return_entry[number_of_return_addrs]; // for invokeinterface return entries 127 static address _invokedynamic_return_entry[number_of_return_addrs]; // for invokedynamic return entries 128 129 static DispatchTable _active_table; // the active dispatch table (used by the interpreter for dispatch) 130 static DispatchTable _normal_table; // the normal dispatch table (used to set the active table in normal mode) 131 static DispatchTable _safept_table; // the safepoint dispatch table (used to set the active table for safepoints) 132 static address _wentry_point[DispatchTable::length]; // wide instructions only (vtos tosca always) 133 134 135 public: 136 // Initialization/debugging 137 static void initialize(); 138 // this only returns whether a pc is within generated code for the interpreter. 139 static bool contains(address pc) { return _code != NULL && _code->contains(pc); } 140 141 public: 142 143 static address remove_activation_early_entry(TosState state) { return _earlyret_entry.entry(state); } 144 #ifdef HOTSWAP 145 static address remove_activation_preserving_args_entry() { return _remove_activation_preserving_args_entry; } 146 #endif // HOTSWAP 147 148 static address remove_activation_entry() { return _remove_activation_entry; } 149 static address throw_exception_entry() { return _throw_exception_entry; } 150 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; } 151 static address throw_WrongMethodType_entry() { return _throw_WrongMethodType_entry; } 152 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; } 153 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; } 154 155 // Code generation 156 #ifndef PRODUCT 157 static address trace_code (TosState state) { return _trace_code.entry(state); } 158 #endif // !PRODUCT 159 static address continuation (TosState state) { return _continuation_entry.entry(state); } 160 static address* dispatch_table(TosState state) { return _active_table.table_for(state); } 161 static address* dispatch_table() { return _active_table.table_for(); } 162 static int distance_from_dispatch_table(TosState state){ return _active_table.distance_from(state); } 163 static address* normal_table(TosState state) { return _normal_table.table_for(state); } 164 static address* normal_table() { return _normal_table.table_for(); } 165 166 // Support for invokes 167 static address* invoke_return_entry_table() { return _invoke_return_entry; } 168 static address* invokeinterface_return_entry_table() { return _invokeinterface_return_entry; } 169 static address* invokedynamic_return_entry_table() { return _invokedynamic_return_entry; } 170 static int TosState_as_index(TosState state); 171 172 static address* invoke_return_entry_table_for(Bytecodes::Code code); 173 174 static address deopt_entry(TosState state, int length); 175 static address return_entry(TosState state, int length, Bytecodes::Code code); 176 177 // Safepoint support 178 static void notice_safepoints(); // stops the thread when reaching a safepoint 179 static void ignore_safepoints(); // ignores safepoints 180 181 // Deoptimization support 182 // Compute the entry address for continuation after 183 static address deopt_continue_after_entry(Method* method, 184 address bcp, 185 int callee_parameters, 186 bool is_top_frame); 187 // Deoptimization should reexecute this bytecode 188 static bool bytecode_should_reexecute(Bytecodes::Code code); 189 // Compute the address for reexecution 190 static address deopt_reexecute_entry(Method* method, address bcp); 191 192 #ifdef TARGET_ARCH_x86 193 # include "templateInterpreter_x86.hpp" 194 #endif 195 #ifdef TARGET_ARCH_sparc 196 # include "templateInterpreter_sparc.hpp" 197 #endif 198 #ifdef TARGET_ARCH_zero 199 # include "templateInterpreter_zero.hpp" 200 #endif 201 #ifdef TARGET_ARCH_arm 202 # include "templateInterpreter_arm.hpp" 203 #endif 204 #ifdef TARGET_ARCH_ppc 205 # include "templateInterpreter_ppc.hpp" 206 #endif 207 #ifdef TARGET_ARCH_aarch64 208 # include "templateInterpreter_aarch64.hpp" 209 #endif 210 211 212 }; 213 214 #endif // !CC_INTERP 215 216 #endif // SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP