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1 /*
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2 * Copyright 2002-2007 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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25 #ifdef CC_INTERP
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26
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27 // CVM definitions find hotspot equivalents...
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28
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29 union VMJavaVal64 {
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30 jlong l;
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31 jdouble d;
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32 uint32_t v[2];
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33 };
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34
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35
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36 typedef class BytecodeInterpreter* interpreterState;
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37
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38 struct call_message {
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39 class methodOopDesc* _callee; /* method to call during call_method request */
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40 address _callee_entry_point; /* address to jump to for call_method request */
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41 int _bcp_advance; /* size of the invoke bytecode operation */
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42 };
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43
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44 struct osr_message {
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45 address _osr_buf; /* the osr buffer */
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46 address _osr_entry; /* the entry to the osr method */
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47 };
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48
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49 struct osr_result {
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50 nmethod* nm; /* osr nmethod */
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51 address return_addr; /* osr blob return address */
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52 };
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53
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54 // Result returned to frame manager
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55 union frame_manager_message {
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56 call_message _to_call; /* describes callee */
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57 Bytecodes::Code _return_kind; /* i_return, a_return, ... */
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58 osr_message _osr; /* describes the osr */
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59 osr_result _osr_result; /* result of OSR request */
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60 };
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61
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62 class BytecodeInterpreter : StackObj {
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63 friend class SharedRuntime;
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64 friend class AbstractInterpreterGenerator;
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65 friend class CppInterpreterGenerator;
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66 friend class InterpreterGenerator;
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67 friend class InterpreterMacroAssembler;
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68 friend class frame;
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69 friend class SharedRuntime;
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70 friend class VMStructs;
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71
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72 public:
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73 enum messages {
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74 no_request = 0, // unused
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75 initialize, // Perform one time interpreter initializations (assumes all switches set)
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76 // status message to C++ interpreter
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77 method_entry, // initial method entry to interpreter
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78 method_resume, // frame manager response to return_from_method request (assuming a frame to resume)
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79 deopt_resume, // returning from a native call into a deopted frame
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80 deopt_resume2, // deopt resume as a result of a PopFrame
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81 got_monitors, // frame manager response to more_monitors request
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82 rethrow_exception, // unwinding and throwing exception
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83 // requests to frame manager from C++ interpreter
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84 call_method, // request for new frame from interpreter, manager responds with method_entry
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85 return_from_method, // request from interpreter to unwind, manager responds with method_continue
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86 more_monitors, // need a new monitor
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87 throwing_exception, // unwind stack and rethrow
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88 popping_frame, // unwind call and retry call
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89 do_osr // request this invocation be OSR's
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90 };
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91
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92 private:
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93 JavaThread* _thread; // the vm's java thread pointer
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94 address _bcp; // instruction pointer
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95 intptr_t* _locals; // local variable pointer
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96 constantPoolCacheOop _constants; // constant pool cache
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97 methodOop _method; // method being executed
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98 DataLayout* _mdx; // compiler profiling data for current bytecode
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99 intptr_t* _stack; // expression stack
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100 messages _msg; // frame manager <-> interpreter message
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101 frame_manager_message _result; // result to frame manager
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102 interpreterState _prev_link; // previous interpreter state
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103 oop _oop_temp; // mirror for interpreted native, null otherwise
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104 intptr_t* _stack_base; // base of expression stack
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105 intptr_t* _stack_limit; // limit of expression stack
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106 BasicObjectLock* _monitor_base; // base of monitors on the native stack
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107
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108
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109 public:
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110 // Constructor is only used by the initialization step. All other instances are created
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111 // by the frame manager.
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112 BytecodeInterpreter(messages msg);
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113
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114 //
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115 // Deoptimization support
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116 //
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117 static void layout_interpreterState(interpreterState to_fill,
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118 frame* caller,
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119 frame* interpreter_frame,
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120 methodOop method,
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121 intptr_t* locals,
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122 intptr_t* stack,
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123 intptr_t* stack_base,
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124 intptr_t* monitor_base,
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125 intptr_t* frame_bottom,
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126 bool top_frame);
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127
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128 /*
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129 * Generic 32-bit wide "Java slot" definition. This type occurs
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130 * in operand stacks, Java locals, object fields, constant pools.
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131 */
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132 union VMJavaVal32 {
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133 jint i;
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134 jfloat f;
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135 class oopDesc* r;
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136 uint32_t raw;
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137 };
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138
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139 /*
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140 * Generic 64-bit Java value definition
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141 */
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142 union VMJavaVal64 {
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143 jlong l;
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144 jdouble d;
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145 uint32_t v[2];
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146 };
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147
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148 /*
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149 * Generic 32-bit wide "Java slot" definition. This type occurs
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150 * in Java locals, object fields, constant pools, and
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151 * operand stacks (as a CVMStackVal32).
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152 */
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153 typedef union VMSlotVal32 {
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154 VMJavaVal32 j; /* For "Java" values */
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155 address a; /* a return created by jsr or jsr_w */
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156 } VMSlotVal32;
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157
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158
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159 /*
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160 * Generic 32-bit wide stack slot definition.
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161 */
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162 union VMStackVal32 {
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163 VMJavaVal32 j; /* For "Java" values */
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164 VMSlotVal32 s; /* any value from a "slot" or locals[] */
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165 };
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166
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167 inline JavaThread* thread() { return _thread; }
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168
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169 inline address bcp() { return _bcp; }
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170 inline void set_bcp(address new_bcp) { _bcp = new_bcp; }
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171
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172 inline intptr_t* locals() { return _locals; }
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173
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174 inline constantPoolCacheOop constants() { return _constants; }
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175 inline methodOop method() { return _method; }
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176 inline DataLayout* mdx() { return _mdx; }
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177 inline void set_mdx(DataLayout *new_mdx) { _mdx = new_mdx; }
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178
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179 inline messages msg() { return _msg; }
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180 inline void set_msg(messages new_msg) { _msg = new_msg; }
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181
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182 inline methodOop callee() { return _result._to_call._callee; }
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183 inline void set_callee(methodOop new_callee) { _result._to_call._callee = new_callee; }
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184 inline void set_callee_entry_point(address entry) { _result._to_call._callee_entry_point = entry; }
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185 inline void set_osr_buf(address buf) { _result._osr._osr_buf = buf; }
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186 inline void set_osr_entry(address entry) { _result._osr._osr_entry = entry; }
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187 inline int bcp_advance() { return _result._to_call._bcp_advance; }
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188 inline void set_bcp_advance(int count) { _result._to_call._bcp_advance = count; }
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189
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190 inline void set_return_kind(Bytecodes::Code kind) { _result._return_kind = kind; }
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191
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192 inline interpreterState prev() { return _prev_link; }
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193
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194 inline intptr_t* stack() { return _stack; }
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195 inline void set_stack(intptr_t* new_stack) { _stack = new_stack; }
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196
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197
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198 inline intptr_t* stack_base() { return _stack_base; }
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199 inline intptr_t* stack_limit() { return _stack_limit; }
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200
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201 inline BasicObjectLock* monitor_base() { return _monitor_base; }
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202
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203 /*
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204 * 64-bit Arithmetic:
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205 *
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206 * The functions below follow the semantics of the
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207 * ladd, land, ldiv, lmul, lor, lxor, and lrem bytecodes,
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208 * respectively.
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209 */
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210
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211 static jlong VMlongAdd(jlong op1, jlong op2);
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212 static jlong VMlongAnd(jlong op1, jlong op2);
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213 static jlong VMlongDiv(jlong op1, jlong op2);
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214 static jlong VMlongMul(jlong op1, jlong op2);
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215 static jlong VMlongOr (jlong op1, jlong op2);
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216 static jlong VMlongSub(jlong op1, jlong op2);
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217 static jlong VMlongXor(jlong op1, jlong op2);
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218 static jlong VMlongRem(jlong op1, jlong op2);
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219
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220 /*
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221 * Shift:
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222 *
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223 * The functions below follow the semantics of the
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224 * lushr, lshl, and lshr bytecodes, respectively.
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225 */
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226
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227 static jlong VMlongUshr(jlong op1, jint op2);
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228 static jlong VMlongShl (jlong op1, jint op2);
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229 static jlong VMlongShr (jlong op1, jint op2);
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230
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231 /*
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232 * Unary:
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233 *
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234 * Return the negation of "op" (-op), according to
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235 * the semantics of the lneg bytecode.
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236 */
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237
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238 static jlong VMlongNeg(jlong op);
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239
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240 /*
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241 * Return the complement of "op" (~op)
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242 */
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243
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244 static jlong VMlongNot(jlong op);
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245
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246
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247 /*
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248 * Comparisons to 0:
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249 */
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250
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251 static int32_t VMlongLtz(jlong op); /* op <= 0 */
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252 static int32_t VMlongGez(jlong op); /* op >= 0 */
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253 static int32_t VMlongEqz(jlong op); /* op == 0 */
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254
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255 /*
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256 * Between operands:
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257 */
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258
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259 static int32_t VMlongEq(jlong op1, jlong op2); /* op1 == op2 */
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260 static int32_t VMlongNe(jlong op1, jlong op2); /* op1 != op2 */
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261 static int32_t VMlongGe(jlong op1, jlong op2); /* op1 >= op2 */
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262 static int32_t VMlongLe(jlong op1, jlong op2); /* op1 <= op2 */
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263 static int32_t VMlongLt(jlong op1, jlong op2); /* op1 < op2 */
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264 static int32_t VMlongGt(jlong op1, jlong op2); /* op1 > op2 */
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265
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266 /*
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267 * Comparisons (returning an jint value: 0, 1, or -1)
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268 *
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269 * Between operands:
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270 *
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271 * Compare "op1" and "op2" according to the semantics of the
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272 * "lcmp" bytecode.
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273 */
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274
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275 static int32_t VMlongCompare(jlong op1, jlong op2);
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276
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277 /*
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278 * Convert int to long, according to "i2l" bytecode semantics
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279 */
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280 static jlong VMint2Long(jint val);
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281
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282 /*
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283 * Convert long to int, according to "l2i" bytecode semantics
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284 */
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285 static jint VMlong2Int(jlong val);
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286
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287 /*
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288 * Convert long to float, according to "l2f" bytecode semantics
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289 */
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290 static jfloat VMlong2Float(jlong val);
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291
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292 /*
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293 * Convert long to double, according to "l2d" bytecode semantics
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294 */
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295 static jdouble VMlong2Double(jlong val);
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296
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297 /*
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298 * Java floating-point float value manipulation.
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299 *
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300 * The result argument is, once again, an lvalue.
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301 *
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302 * Arithmetic:
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303 *
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304 * The functions below follow the semantics of the
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305 * fadd, fsub, fmul, fdiv, and frem bytecodes,
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306 * respectively.
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307 */
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308
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309 static jfloat VMfloatAdd(jfloat op1, jfloat op2);
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310 static jfloat VMfloatSub(jfloat op1, jfloat op2);
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311 static jfloat VMfloatMul(jfloat op1, jfloat op2);
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312 static jfloat VMfloatDiv(jfloat op1, jfloat op2);
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313 static jfloat VMfloatRem(jfloat op1, jfloat op2);
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314
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315 /*
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316 * Unary:
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317 *
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318 * Return the negation of "op" (-op), according to
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319 * the semantics of the fneg bytecode.
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320 */
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321
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322 static jfloat VMfloatNeg(jfloat op);
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323
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324 /*
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325 * Comparisons (returning an int value: 0, 1, or -1)
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326 *
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327 * Between operands:
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328 *
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329 * Compare "op1" and "op2" according to the semantics of the
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330 * "fcmpl" (direction is -1) or "fcmpg" (direction is 1) bytecodes.
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331 */
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332
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333 static int32_t VMfloatCompare(jfloat op1, jfloat op2,
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334 int32_t direction);
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335 /*
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336 * Conversion:
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337 */
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338
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339 /*
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340 * Convert float to double, according to "f2d" bytecode semantics
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341 */
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342
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343 static jdouble VMfloat2Double(jfloat op);
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344
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345 /*
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346 ******************************************
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347 * Java double floating-point manipulation.
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348 ******************************************
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349 *
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350 * The result argument is, once again, an lvalue.
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351 *
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352 * Conversions:
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353 */
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354
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355 /*
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356 * Convert double to int, according to "d2i" bytecode semantics
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357 */
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358
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359 static jint VMdouble2Int(jdouble val);
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360
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361 /*
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362 * Convert double to float, according to "d2f" bytecode semantics
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363 */
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364
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365 static jfloat VMdouble2Float(jdouble val);
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366
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367 /*
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368 * Convert int to double, according to "i2d" bytecode semantics
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369 */
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370
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371 static jdouble VMint2Double(jint val);
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372
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373 /*
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374 * Arithmetic:
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375 *
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376 * The functions below follow the semantics of the
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377 * dadd, dsub, ddiv, dmul, and drem bytecodes, respectively.
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378 */
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379
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380 static jdouble VMdoubleAdd(jdouble op1, jdouble op2);
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381 static jdouble VMdoubleSub(jdouble op1, jdouble op2);
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382 static jdouble VMdoubleDiv(jdouble op1, jdouble op2);
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383 static jdouble VMdoubleMul(jdouble op1, jdouble op2);
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384 static jdouble VMdoubleRem(jdouble op1, jdouble op2);
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385
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386 /*
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387 * Unary:
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388 *
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389 * Return the negation of "op" (-op), according to
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390 * the semantics of the dneg bytecode.
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391 */
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392
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393 static jdouble VMdoubleNeg(jdouble op);
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394
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395 /*
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396 * Comparisons (returning an int32_t value: 0, 1, or -1)
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397 *
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398 * Between operands:
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399 *
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400 * Compare "op1" and "op2" according to the semantics of the
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401 * "dcmpl" (direction is -1) or "dcmpg" (direction is 1) bytecodes.
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402 */
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403
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404 static int32_t VMdoubleCompare(jdouble op1, jdouble op2, int32_t direction);
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405
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406 /*
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407 * Copy two typeless 32-bit words from one location to another.
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408 * This is semantically equivalent to:
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409 *
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410 * to[0] = from[0];
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411 * to[1] = from[1];
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412 *
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413 * but this interface is provided for those platforms that could
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414 * optimize this into a single 64-bit transfer.
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415 */
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416
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417 static void VMmemCopy64(uint32_t to[2], const uint32_t from[2]);
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418
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419
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420 // Arithmetic operations
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421
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422 /*
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423 * Java arithmetic methods.
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424 * The functions below follow the semantics of the
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425 * iadd, isub, imul, idiv, irem, iand, ior, ixor,
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426 * and ineg bytecodes, respectively.
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427 */
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428
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429 static jint VMintAdd(jint op1, jint op2);
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430 static jint VMintSub(jint op1, jint op2);
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431 static jint VMintMul(jint op1, jint op2);
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432 static jint VMintDiv(jint op1, jint op2);
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433 static jint VMintRem(jint op1, jint op2);
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434 static jint VMintAnd(jint op1, jint op2);
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435 static jint VMintOr (jint op1, jint op2);
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436 static jint VMintXor(jint op1, jint op2);
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437
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438 /*
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439 * Shift Operation:
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440 * The functions below follow the semantics of the
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441 * iushr, ishl, and ishr bytecodes, respectively.
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442 */
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443
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444 static jint VMintUshr(jint op, jint num);
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445 static jint VMintShl (jint op, jint num);
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446 static jint VMintShr (jint op, jint num);
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447
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448 /*
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449 * Unary Operation:
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450 *
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451 * Return the negation of "op" (-op), according to
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452 * the semantics of the ineg bytecode.
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453 */
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454
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455 static jint VMintNeg(jint op);
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456
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457 /*
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458 * Int Conversions:
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459 */
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460
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461 /*
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462 * Convert int to float, according to "i2f" bytecode semantics
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463 */
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464
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465 static jfloat VMint2Float(jint val);
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466
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467 /*
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468 * Convert int to byte, according to "i2b" bytecode semantics
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469 */
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470
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471 static jbyte VMint2Byte(jint val);
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472
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473 /*
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474 * Convert int to char, according to "i2c" bytecode semantics
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475 */
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476
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477 static jchar VMint2Char(jint val);
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478
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479 /*
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480 * Convert int to short, according to "i2s" bytecode semantics
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481 */
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482
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483 static jshort VMint2Short(jint val);
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484
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485 /*=========================================================================
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486 * Bytecode interpreter operations
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487 *=======================================================================*/
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488
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489 static void dup(intptr_t *tos);
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490 static void dup2(intptr_t *tos);
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491 static void dup_x1(intptr_t *tos); /* insert top word two down */
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492 static void dup_x2(intptr_t *tos); /* insert top word three down */
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493 static void dup2_x1(intptr_t *tos); /* insert top 2 slots three down */
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494 static void dup2_x2(intptr_t *tos); /* insert top 2 slots four down */
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495 static void swap(intptr_t *tos); /* swap top two elements */
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496
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497 // umm don't like this method modifies its object
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498
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499 // The Interpreter used when
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500 static void run(interpreterState istate);
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501 // The interpreter used if JVMTI needs interpreter events
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502 static void runWithChecks(interpreterState istate);
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503 static void End_Of_Interpreter(void);
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504
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505 // Inline static functions for Java Stack and Local manipulation
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506
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507 static address stack_slot(intptr_t *tos, int offset);
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508 static jint stack_int(intptr_t *tos, int offset);
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509 static jfloat stack_float(intptr_t *tos, int offset);
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510 static oop stack_object(intptr_t *tos, int offset);
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511 static jdouble stack_double(intptr_t *tos, int offset);
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512 static jlong stack_long(intptr_t *tos, int offset);
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513
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514 static void tag_stack(intptr_t *tos, frame::Tag tag, int offset);
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515
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516 // only used for value types
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517 static void set_stack_slot(intptr_t *tos, address value, int offset);
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518 static void set_stack_int(intptr_t *tos, int value, int offset);
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519 static void set_stack_float(intptr_t *tos, jfloat value, int offset);
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520 static void set_stack_object(intptr_t *tos, oop value, int offset);
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521
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522 // needs to be platform dep for the 32 bit platforms.
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523 static void set_stack_double(intptr_t *tos, jdouble value, int offset);
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524 static void set_stack_long(intptr_t *tos, jlong value, int offset);
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525
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526 static void set_stack_double_from_addr(intptr_t *tos, address addr, int offset);
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527 static void set_stack_long_from_addr(intptr_t *tos, address addr, int offset);
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528
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529 // Locals
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530
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531 static address locals_slot(intptr_t* locals, int offset);
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532 static jint locals_int(intptr_t* locals, int offset);
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533 static jfloat locals_float(intptr_t* locals, int offset);
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534 static oop locals_object(intptr_t* locals, int offset);
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535 static jdouble locals_double(intptr_t* locals, int offset);
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536 static jlong locals_long(intptr_t* locals, int offset);
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537
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538 static address locals_long_at(intptr_t* locals, int offset);
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539 static address locals_double_at(intptr_t* locals, int offset);
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540
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541 static void tag_locals(intptr_t *locals, frame::Tag tag, int offset);
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542
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543 static void set_locals_slot(intptr_t *locals, address value, int offset);
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544 static void set_locals_int(intptr_t *locals, jint value, int offset);
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|
545 static void set_locals_float(intptr_t *locals, jfloat value, int offset);
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546 static void set_locals_object(intptr_t *locals, oop value, int offset);
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547 static void set_locals_double(intptr_t *locals, jdouble value, int offset);
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|
|
548 static void set_locals_long(intptr_t *locals, jlong value, int offset);
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|
549 static void set_locals_double_from_addr(intptr_t *locals,
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|
550 address addr, int offset);
|
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|
551 static void set_locals_long_from_addr(intptr_t *locals,
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|
552 address addr, int offset);
|
|
|
553
|
|
|
554 static void astore(intptr_t* topOfStack, int stack_offset,
|
|
|
555 intptr_t* locals, int locals_offset);
|
|
|
556
|
|
|
557 // Support for dup and swap
|
|
|
558 static void copy_stack_slot(intptr_t *tos, int from_offset, int to_offset);
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|
|
559
|
|
|
560 #ifndef PRODUCT
|
|
|
561 static void verify_locals_tag(intptr_t *locals, frame::Tag tag, int offset);
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|
|
562 static void verify_stack_tag(intptr_t *tos, frame::Tag tag, int offset);
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|
|
563 static const char* C_msg(BytecodeInterpreter::messages msg);
|
|
|
564 void print();
|
|
|
565 #endif // PRODUCT
|
|
|
566
|
|
|
567 // Platform fields/methods
|
|
|
568 # include "incls/_bytecodeInterpreter_pd.hpp.incl"
|
|
|
569
|
|
|
570 }; // BytecodeInterpreter
|
|
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571
|
|
|
572 #endif // CC_INTERP
|
