annotate src/share/vm/interpreter/abstractInterpreter.hpp @ 3992:d1bdeef3e3e2

7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76 Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing. Reviewed-by: tonyp, brutisso, ysr
author johnc
date Wed, 12 Oct 2011 10:25:51 -0700
parents f08d439fab8c
children 6759698e3140
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1 /*
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
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26 #define SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
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27
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28 #include "code/stubs.hpp"
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29 #include "interpreter/bytecodes.hpp"
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30 #include "runtime/vmThread.hpp"
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31 #include "utilities/top.hpp"
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32 #ifdef TARGET_ARCH_MODEL_x86_32
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33 # include "interp_masm_x86_32.hpp"
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34 #endif
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35 #ifdef TARGET_ARCH_MODEL_x86_64
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36 # include "interp_masm_x86_64.hpp"
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37 #endif
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38 #ifdef TARGET_ARCH_MODEL_sparc
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39 # include "interp_masm_sparc.hpp"
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40 #endif
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41 #ifdef TARGET_ARCH_MODEL_zero
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42 # include "interp_masm_zero.hpp"
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43 #endif
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44 #ifdef TARGET_ARCH_MODEL_arm
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45 # include "interp_masm_arm.hpp"
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46 #endif
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47 #ifdef TARGET_ARCH_MODEL_ppc
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48 # include "interp_masm_ppc.hpp"
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49 #endif
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50 #ifdef TARGET_OS_FAMILY_linux
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51 # include "thread_linux.inline.hpp"
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52 #endif
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53 #ifdef TARGET_OS_FAMILY_solaris
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54 # include "thread_solaris.inline.hpp"
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55 #endif
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56 #ifdef TARGET_OS_FAMILY_windows
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57 # include "thread_windows.inline.hpp"
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58 #endif
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59 #ifdef TARGET_OS_FAMILY_bsd
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60 # include "thread_bsd.inline.hpp"
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61 #endif
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62
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63 // This file contains the platform-independent parts
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64 // of the abstract interpreter and the abstract interpreter generator.
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65
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66 // Organization of the interpreter(s). There exists two different interpreters in hotpot
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67 // an assembly language version (aka template interpreter) and a high level language version
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68 // (aka c++ interpreter). Th division of labor is as follows:
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69
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70 // Template Interpreter C++ Interpreter Functionality
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71 //
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72 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes
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73 //
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74 // templateInterpreter* cppInterpreter* generation of assembly code that creates
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75 // and manages interpreter runtime frames.
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76 // Also code for populating interpreter
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77 // frames created during deoptimization.
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78 //
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79 // For both template and c++ interpreter. There are common files for aspects of the interpreter
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80 // that are generic to both interpreters. This is the layout:
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81 //
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82 // abstractInterpreter.hpp: generic description of the interpreter.
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83 // interpreter*: generic frame creation and handling.
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84 //
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85
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86 //------------------------------------------------------------------------------------------------------------------------
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87 // The C++ interface to the bytecode interpreter(s).
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88
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89 class AbstractInterpreter: AllStatic {
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90 friend class VMStructs;
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91 friend class Interpreter;
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92 friend class CppInterpreterGenerator;
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93 public:
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94 enum MethodKind {
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95 zerolocals, // method needs locals initialization
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96 zerolocals_synchronized, // method needs locals initialization & is synchronized
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97 native, // native method
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98 native_synchronized, // native method & is synchronized
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99 empty, // empty method (code: _return)
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100 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return)
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101 abstract, // abstract method (throws an AbstractMethodException)
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102 method_handle, // java.lang.invoke.MethodHandles::invoke
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103 java_lang_math_sin, // implementation of java.lang.Math.sin (x)
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104 java_lang_math_cos, // implementation of java.lang.Math.cos (x)
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105 java_lang_math_tan, // implementation of java.lang.Math.tan (x)
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106 java_lang_math_abs, // implementation of java.lang.Math.abs (x)
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107 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
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108 java_lang_math_log, // implementation of java.lang.Math.log (x)
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109 java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
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110 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get()
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111 number_of_method_entries,
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112 invalid = -1
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113 };
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114
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115 enum SomeConstants {
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116 number_of_result_handlers = 10 // number of result handlers for native calls
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117 };
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118
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119 protected:
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120 static StubQueue* _code; // the interpreter code (codelets)
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121
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122 static bool _notice_safepoints; // true if safepoints are activated
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123
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124 static address _native_entry_begin; // Region for native entry code
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125 static address _native_entry_end;
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126
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127 // method entry points
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128 static address _entry_table[number_of_method_entries]; // entry points for a given method
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129 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
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130 static address _slow_signature_handler; // the native method generic (slow) signature handler
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131
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132 static address _rethrow_exception_entry; // rethrows an activation in previous frame
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133
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134 friend class AbstractInterpreterGenerator;
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135 friend class InterpreterGenerator;
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136 friend class InterpreterMacroAssembler;
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137
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138 public:
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139 // Initialization/debugging
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140 static void initialize();
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141 static StubQueue* code() { return _code; }
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142
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143
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144 // Method activation
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145 static MethodKind method_kind(methodHandle m);
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146 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
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147 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); }
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148
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149 static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
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150
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151 static bool can_be_compiled(methodHandle m);
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152
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153 // Runtime support
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154
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155 // length = invoke bytecode length (to advance to next bytecode)
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156 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
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157 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
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158
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159 static address rethrow_exception_entry() { return _rethrow_exception_entry; }
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160
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161 // Activation size in words for a method that is just being called.
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162 // Parameters haven't been pushed so count them too.
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163 static int size_top_interpreter_activation(methodOop method);
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164
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165 // Deoptimization support
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166 // Compute the entry address for continuation after
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167 static address deopt_continue_after_entry(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 // Compute the entry address for reexecution
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172 static address deopt_reexecute_entry(methodOop method, address bcp);
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173 // Deoptimization should reexecute this bytecode
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174 static bool bytecode_should_reexecute(Bytecodes::Code code);
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175
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176 // share implementation of size_activation and layout_activation:
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177 static int size_activation(methodOop method,
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178 int temps,
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179 int popframe_args,
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180 int monitors,
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181 int caller_actual_parameters,
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182 int callee_params,
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183 int callee_locals,
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184 bool is_top_frame) {
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185 return layout_activation(method,
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186 temps,
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187 popframe_args,
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188 monitors,
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189 caller_actual_parameters,
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190 callee_params,
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191 callee_locals,
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192 (frame*)NULL,
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193 (frame*)NULL,
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194 is_top_frame);
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195 }
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196
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197 static int layout_activation(methodOop method,
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198 int temps,
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199 int popframe_args,
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200 int monitors,
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201 int caller_actual_parameters,
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202 int callee_params,
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203 int callee_locals,
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204 frame* caller,
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205 frame* interpreter_frame,
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206 bool is_top_frame);
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207
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208 // Runtime support
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209 static bool is_not_reached( methodHandle method, int bci);
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210 // Safepoint support
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211 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
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212 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
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213
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214 // Support for native calls
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215 static address slow_signature_handler() { return _slow_signature_handler; }
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216 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
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217 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
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218 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; }
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219 // Debugging/printing
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220 static void print(); // prints the interpreter code
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221
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222 public:
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223 // Interpreter helpers
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224 const static int stackElementWords = 1;
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225 const static int stackElementSize = stackElementWords * wordSize;
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226 const static int logStackElementSize = LogBytesPerWord;
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227
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228 // Local values relative to locals[n]
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229 static int local_offset_in_bytes(int n) {
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230 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize);
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231 }
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232
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233 // access to stacked values according to type:
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234 static oop* oop_addr_in_slot(intptr_t* slot_addr) {
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235 return (oop*) slot_addr;
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236 }
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237 static jint* int_addr_in_slot(intptr_t* slot_addr) {
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238 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different())
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239 // big-endian LP64
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240 return (jint*)(slot_addr + 1) - 1;
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241 else
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242 return (jint*) slot_addr;
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243 }
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244 static jlong long_in_slot(intptr_t* slot_addr) {
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245 if (sizeof(intptr_t) >= sizeof(jlong)) {
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246 return *(jlong*) slot_addr;
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247 } else {
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248 return Bytes::get_native_u8((address)slot_addr);
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249 }
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250 }
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251 static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
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252 if (sizeof(intptr_t) >= sizeof(jlong)) {
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253 *(jlong*) slot_addr = value;
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254 } else {
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255 Bytes::put_native_u8((address)slot_addr, value);
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256 }
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257 }
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258 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
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259 switch (type) {
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260 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break;
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261 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break;
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262 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break;
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263 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break;
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264 case T_INT: value->i = *int_addr_in_slot(slot_addr); break;
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265 case T_LONG: value->j = long_in_slot(slot_addr); break;
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266 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break;
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267 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break;
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268 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break;
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269 default: ShouldNotReachHere();
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270 }
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271 }
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272 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
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273 switch (type) {
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274 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break;
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275 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break;
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276 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break;
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277 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break;
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278 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break;
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279 case T_LONG: set_long_in_slot(slot_addr, value->j); break;
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280 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break;
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281 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break;
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282 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break;
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283 default: ShouldNotReachHere();
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284 }
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285 }
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286 };
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287
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288 //------------------------------------------------------------------------------------------------------------------------
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289 // The interpreter generator.
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290
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291 class Template;
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292 class AbstractInterpreterGenerator: public StackObj {
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293 protected:
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294 InterpreterMacroAssembler* _masm;
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295
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296 // shared code sequences
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297 // Converter for native abi result to tosca result
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298 address generate_result_handler_for(BasicType type);
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299 address generate_slow_signature_handler();
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300
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301 // entry point generator
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302 address generate_method_entry(AbstractInterpreter::MethodKind kind);
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303
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304 void bang_stack_shadow_pages(bool native_call);
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305
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306 void generate_all();
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307
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308 public:
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309 AbstractInterpreterGenerator(StubQueue* _code);
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310 };
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311
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312 #endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP