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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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605
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25 // This file contains the platform-independent parts
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0
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26 // of the template interpreter and the template interpreter generator.
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27
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28 #ifndef CC_INTERP
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29
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30 //------------------------------------------------------------------------------------------------------------------------
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31 // A little wrapper class to group tosca-specific entry points into a unit.
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32 // (tosca = Top-Of-Stack CAche)
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33
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34 class EntryPoint VALUE_OBJ_CLASS_SPEC {
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35 private:
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36 address _entry[number_of_states];
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37
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38 public:
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39 // Construction
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40 EntryPoint();
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41 EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry);
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42
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43 // Attributes
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44 address entry(TosState state) const; // return target address for a given tosca state
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45 void set_entry(TosState state, address entry); // set target address for a given tosca state
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46 void print();
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47
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48 // Comparison
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49 bool operator == (const EntryPoint& y); // for debugging only
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50 };
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51
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52
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53 //------------------------------------------------------------------------------------------------------------------------
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54 // A little wrapper class to group tosca-specific dispatch tables into a unit.
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55
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56 class DispatchTable VALUE_OBJ_CLASS_SPEC {
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57 public:
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58 enum { length = 1 << BitsPerByte }; // an entry point for each byte value (also for undefined bytecodes)
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59
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60 private:
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61 address _table[number_of_states][length]; // dispatch tables, indexed by tosca and bytecode
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62
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63 public:
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64 // Attributes
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65 EntryPoint entry(int i) const; // return entry point for a given bytecode i
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66 void set_entry(int i, EntryPoint& entry); // set entry point for a given bytecode i
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67 address* table_for(TosState state) { return _table[state]; }
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68 address* table_for() { return table_for((TosState)0); }
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69 int distance_from(address *table) { return table - table_for(); }
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70 int distance_from(TosState state) { return distance_from(table_for(state)); }
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71
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72 // Comparison
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73 bool operator == (DispatchTable& y); // for debugging only
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74 };
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75
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76 class TemplateInterpreter: public AbstractInterpreter {
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77 friend class VMStructs;
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78 friend class InterpreterMacroAssembler;
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79 friend class TemplateInterpreterGenerator;
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80 friend class TemplateTable;
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81 // friend class Interpreter;
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82 public:
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83
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84 enum MoreConstants {
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85 number_of_return_entries = 9, // number of return entry points
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86 number_of_deopt_entries = 9, // number of deoptimization entry points
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87 number_of_return_addrs = 9 // number of return addresses
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88 };
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89
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90 protected:
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91
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92 static address _throw_ArrayIndexOutOfBoundsException_entry;
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93 static address _throw_ArrayStoreException_entry;
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94 static address _throw_ArithmeticException_entry;
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95 static address _throw_ClassCastException_entry;
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96 static address _throw_NullPointerException_entry;
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97 static address _throw_exception_entry;
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98
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99 static address _throw_StackOverflowError_entry;
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100
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101 static address _remove_activation_entry; // continuation address if an exception is not handled by current frame
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102 #ifdef HOTSWAP
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103 static address _remove_activation_preserving_args_entry; // continuation address when current frame is being popped
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104 #endif // HOTSWAP
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105
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106 #ifndef PRODUCT
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107 static EntryPoint _trace_code;
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108 #endif // !PRODUCT
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109 static EntryPoint _return_entry[number_of_return_entries]; // entry points to return to from a call
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110 static EntryPoint _earlyret_entry; // entry point to return early from a call
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111 static EntryPoint _deopt_entry[number_of_deopt_entries]; // entry points to return to from a deoptimization
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112 static EntryPoint _continuation_entry;
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113 static EntryPoint _safept_entry;
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114
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115 static address _return_3_addrs_by_index[number_of_return_addrs]; // for invokevirtual return entries
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116 static address _return_5_addrs_by_index[number_of_return_addrs]; // for invokeinterface return entries
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117
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118 static DispatchTable _active_table; // the active dispatch table (used by the interpreter for dispatch)
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119 static DispatchTable _normal_table; // the normal dispatch table (used to set the active table in normal mode)
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120 static DispatchTable _safept_table; // the safepoint dispatch table (used to set the active table for safepoints)
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121 static address _wentry_point[DispatchTable::length]; // wide instructions only (vtos tosca always)
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122
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123
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124 public:
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125 // Initialization/debugging
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126 static void initialize();
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127 // this only returns whether a pc is within generated code for the interpreter.
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128 static bool contains(address pc) { return _code != NULL && _code->contains(pc); }
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129
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130 public:
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131
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132 static address remove_activation_early_entry(TosState state) { return _earlyret_entry.entry(state); }
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133 #ifdef HOTSWAP
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134 static address remove_activation_preserving_args_entry() { return _remove_activation_preserving_args_entry; }
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135 #endif // HOTSWAP
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136
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137 static address remove_activation_entry() { return _remove_activation_entry; }
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138 static address throw_exception_entry() { return _throw_exception_entry; }
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139 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
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140 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
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141 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
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142
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143 // Code generation
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144 #ifndef PRODUCT
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145 static address trace_code (TosState state) { return _trace_code.entry(state); }
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146 #endif // !PRODUCT
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147 static address continuation (TosState state) { return _continuation_entry.entry(state); }
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148 static address* dispatch_table(TosState state) { return _active_table.table_for(state); }
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149 static address* dispatch_table() { return _active_table.table_for(); }
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150 static int distance_from_dispatch_table(TosState state){ return _active_table.distance_from(state); }
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151 static address* normal_table(TosState state) { return _normal_table.table_for(state); }
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152 static address* normal_table() { return _normal_table.table_for(); }
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153
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154 // Support for invokes
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155 static address* return_3_addrs_by_index_table() { return _return_3_addrs_by_index; }
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156 static address* return_5_addrs_by_index_table() { return _return_5_addrs_by_index; }
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157 static int TosState_as_index(TosState state); // computes index into return_3_entry_by_index table
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158
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159 static address return_entry (TosState state, int length);
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160 static address deopt_entry (TosState state, int length);
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161
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162 // Safepoint support
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163 static void notice_safepoints(); // stops the thread when reaching a safepoint
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164 static void ignore_safepoints(); // ignores safepoints
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165
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166 // Deoptimization support
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167 static address continuation_for(methodOop method,
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168 address bcp,
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169 int callee_parameters,
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170 bool is_top_frame,
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171 bool& use_next_mdp);
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172
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173 #include "incls/_templateInterpreter_pd.hpp.incl"
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174
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175 };
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176
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177 #endif // !CC_INTERP
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