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0
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1 /*
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1295
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2 * Copyright 1999-2010 Sun Microsystems, Inc. All Rights Reserved.
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0
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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 class CodeEmitInfo;
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26 class LIR_Assembler;
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27 class LIR_OpVisitState;
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28
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29 // CodeStubs are little 'out-of-line' pieces of code that
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30 // usually handle slow cases of operations. All code stubs
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31 // are collected and code is emitted at the end of the
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32 // nmethod.
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33
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34 class CodeStub: public CompilationResourceObj {
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35 protected:
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36 Label _entry; // label at the stub entry point
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37 Label _continuation; // label where stub continues, if any
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38
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39 public:
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40 CodeStub() {}
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41
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42 // code generation
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43 void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); }
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44 virtual void emit_code(LIR_Assembler* e) = 0;
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45 virtual CodeEmitInfo* info() const { return NULL; }
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46 virtual bool is_exception_throw_stub() const { return false; }
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47 virtual bool is_range_check_stub() const { return false; }
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48 virtual bool is_divbyzero_stub() const { return false; }
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49 #ifndef PRODUCT
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50 virtual void print_name(outputStream* out) const = 0;
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51 #endif
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52
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53 // label access
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54 Label* entry() { return &_entry; }
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55 Label* continuation() { return &_continuation; }
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56 // for LIR
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57 virtual void visit(LIR_OpVisitState* visit) {
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58 #ifndef PRODUCT
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59 if (LIRTracePeephole && Verbose) {
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60 tty->print("no visitor for ");
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61 print_name(tty);
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62 tty->cr();
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63 }
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64 #endif
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65 }
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66 };
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67
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68
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69 define_array(CodeStubArray, CodeStub*)
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70 define_stack(_CodeStubList, CodeStubArray)
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71
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72 class CodeStubList: public _CodeStubList {
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73 public:
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74 CodeStubList(): _CodeStubList() {}
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75
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76 void append(CodeStub* stub) {
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77 if (!contains(stub)) {
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78 _CodeStubList::append(stub);
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79 }
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80 }
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81 };
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82
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83 #ifdef TIERED
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84 class CounterOverflowStub: public CodeStub {
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85 private:
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86 CodeEmitInfo* _info;
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87 int _bci;
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88
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89 public:
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90 CounterOverflowStub(CodeEmitInfo* info, int bci) : _info(info), _bci(bci) {
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91 }
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92
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93 virtual void emit_code(LIR_Assembler* e);
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94
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95 virtual void visit(LIR_OpVisitState* visitor) {
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96 visitor->do_slow_case(_info);
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97 }
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98
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99 #ifndef PRODUCT
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100 virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); }
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101 #endif // PRODUCT
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102
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103 };
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104 #endif // TIERED
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105
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106 class ConversionStub: public CodeStub {
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107 private:
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108 Bytecodes::Code _bytecode;
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109 LIR_Opr _input;
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110 LIR_Opr _result;
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111
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112 static float float_zero;
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113 static double double_zero;
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114 public:
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115 ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result)
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116 : _bytecode(bytecode), _input(input), _result(result) {
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117 }
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118
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119 Bytecodes::Code bytecode() { return _bytecode; }
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120 LIR_Opr input() { return _input; }
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121 LIR_Opr result() { return _result; }
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122
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123 virtual void emit_code(LIR_Assembler* e);
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124 virtual void visit(LIR_OpVisitState* visitor) {
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125 visitor->do_slow_case();
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126 visitor->do_input(_input);
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127 visitor->do_output(_result);
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128 }
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129 #ifndef PRODUCT
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130 virtual void print_name(outputStream* out) const { out->print("ConversionStub"); }
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131 #endif // PRODUCT
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132 };
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133
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134
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135 // Throws ArrayIndexOutOfBoundsException by default but can be
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136 // configured to throw IndexOutOfBoundsException in constructor
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137 class RangeCheckStub: public CodeStub {
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138 private:
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139 CodeEmitInfo* _info;
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140 LIR_Opr _index;
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141 bool _throw_index_out_of_bounds_exception;
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142
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143 public:
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144 RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false);
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145 virtual void emit_code(LIR_Assembler* e);
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146 virtual CodeEmitInfo* info() const { return _info; }
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147 virtual bool is_exception_throw_stub() const { return true; }
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148 virtual bool is_range_check_stub() const { return true; }
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149 virtual void visit(LIR_OpVisitState* visitor) {
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150 visitor->do_slow_case(_info);
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151 visitor->do_input(_index);
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152 }
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153 #ifndef PRODUCT
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154 virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); }
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155 #endif // PRODUCT
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156 };
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157
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158
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159 class DivByZeroStub: public CodeStub {
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160 private:
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161 CodeEmitInfo* _info;
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162 int _offset;
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163
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164 public:
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165 DivByZeroStub(CodeEmitInfo* info)
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166 : _info(info), _offset(-1) {
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167 }
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168 DivByZeroStub(int offset, CodeEmitInfo* info)
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169 : _info(info), _offset(offset) {
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170 }
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171 virtual void emit_code(LIR_Assembler* e);
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172 virtual CodeEmitInfo* info() const { return _info; }
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173 virtual bool is_exception_throw_stub() const { return true; }
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174 virtual bool is_divbyzero_stub() const { return true; }
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175 virtual void visit(LIR_OpVisitState* visitor) {
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176 visitor->do_slow_case(_info);
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177 }
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178 #ifndef PRODUCT
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179 virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); }
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180 #endif // PRODUCT
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181 };
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182
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183
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184 class ImplicitNullCheckStub: public CodeStub {
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185 private:
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186 CodeEmitInfo* _info;
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187 int _offset;
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188
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189 public:
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190 ImplicitNullCheckStub(int offset, CodeEmitInfo* info)
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191 : _offset(offset), _info(info) {
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192 }
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193 virtual void emit_code(LIR_Assembler* e);
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194 virtual CodeEmitInfo* info() const { return _info; }
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195 virtual bool is_exception_throw_stub() const { return true; }
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196 virtual void visit(LIR_OpVisitState* visitor) {
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197 visitor->do_slow_case(_info);
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198 }
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199 #ifndef PRODUCT
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200 virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); }
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201 #endif // PRODUCT
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202 };
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203
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204
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205 class NewInstanceStub: public CodeStub {
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206 private:
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207 ciInstanceKlass* _klass;
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208 LIR_Opr _klass_reg;
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209 LIR_Opr _result;
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210 CodeEmitInfo* _info;
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211 Runtime1::StubID _stub_id;
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212
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213 public:
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214 NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id);
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215 virtual void emit_code(LIR_Assembler* e);
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216 virtual CodeEmitInfo* info() const { return _info; }
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217 virtual void visit(LIR_OpVisitState* visitor) {
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218 visitor->do_slow_case(_info);
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219 visitor->do_input(_klass_reg);
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220 visitor->do_output(_result);
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221 }
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222 #ifndef PRODUCT
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223 virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); }
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224 #endif // PRODUCT
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225 };
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226
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227
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228 class NewTypeArrayStub: public CodeStub {
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229 private:
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230 LIR_Opr _klass_reg;
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231 LIR_Opr _length;
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232 LIR_Opr _result;
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233 CodeEmitInfo* _info;
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234
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235 public:
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236 NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
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237 virtual void emit_code(LIR_Assembler* e);
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238 virtual CodeEmitInfo* info() const { return _info; }
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239 virtual void visit(LIR_OpVisitState* visitor) {
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240 visitor->do_slow_case(_info);
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241 visitor->do_input(_klass_reg);
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242 visitor->do_input(_length);
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243 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
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244 }
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245 #ifndef PRODUCT
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246 virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); }
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247 #endif // PRODUCT
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248 };
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249
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250
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251 class NewObjectArrayStub: public CodeStub {
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252 private:
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253 LIR_Opr _klass_reg;
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254 LIR_Opr _length;
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255 LIR_Opr _result;
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256 CodeEmitInfo* _info;
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257
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258 public:
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259 NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
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260 virtual void emit_code(LIR_Assembler* e);
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261 virtual CodeEmitInfo* info() const { return _info; }
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262 virtual void visit(LIR_OpVisitState* visitor) {
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263 visitor->do_slow_case(_info);
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264 visitor->do_input(_klass_reg);
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265 visitor->do_input(_length);
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266 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
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267 }
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268 #ifndef PRODUCT
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269 virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); }
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270 #endif // PRODUCT
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271 };
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272
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273
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274 class MonitorAccessStub: public CodeStub {
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275 protected:
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276 LIR_Opr _obj_reg;
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277 LIR_Opr _lock_reg;
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278
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279 public:
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280 MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) {
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281 _obj_reg = obj_reg;
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282 _lock_reg = lock_reg;
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283 }
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284
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285 #ifndef PRODUCT
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286 virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); }
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287 #endif // PRODUCT
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288 };
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289
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290
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291 class MonitorEnterStub: public MonitorAccessStub {
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292 private:
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293 CodeEmitInfo* _info;
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294
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295 public:
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296 MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info);
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297
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298 virtual void emit_code(LIR_Assembler* e);
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299 virtual CodeEmitInfo* info() const { return _info; }
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300 virtual void visit(LIR_OpVisitState* visitor) {
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301 visitor->do_input(_obj_reg);
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302 visitor->do_input(_lock_reg);
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303 visitor->do_slow_case(_info);
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304 }
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305 #ifndef PRODUCT
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306 virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); }
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307 #endif // PRODUCT
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308 };
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309
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310
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311 class MonitorExitStub: public MonitorAccessStub {
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312 private:
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313 bool _compute_lock;
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314 int _monitor_ix;
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315
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316 public:
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317 MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix)
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318 : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg),
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319 _compute_lock(compute_lock), _monitor_ix(monitor_ix) { }
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320 virtual void emit_code(LIR_Assembler* e);
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321 virtual void visit(LIR_OpVisitState* visitor) {
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322 assert(_obj_reg->is_illegal(), "unused");
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323 if (_compute_lock) {
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324 visitor->do_temp(_lock_reg);
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325 } else {
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326 visitor->do_input(_lock_reg);
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327 }
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328 }
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329 #ifndef PRODUCT
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330 virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); }
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331 #endif // PRODUCT
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332 };
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333
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334
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335 class PatchingStub: public CodeStub {
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336 public:
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337 enum PatchID {
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338 access_field_id,
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339 load_klass_id
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340 };
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341 enum constants {
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342 patch_info_size = 3
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343 };
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344 private:
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345 PatchID _id;
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346 address _pc_start;
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347 int _bytes_to_copy;
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348 Label _patched_code_entry;
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349 Label _patch_site_entry;
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350 Label _patch_site_continuation;
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351 Register _obj;
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352 CodeEmitInfo* _info;
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353 int _oop_index; // index of the patchable oop in nmethod oop table if needed
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354 static int _patch_info_offset;
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355
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356 void align_patch_site(MacroAssembler* masm);
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357
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358 public:
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359 static int patch_info_offset() { return _patch_info_offset; }
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360
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361 PatchingStub(MacroAssembler* masm, PatchID id, int oop_index = -1):
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362 _id(id)
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363 , _info(NULL)
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364 , _oop_index(oop_index) {
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365 if (os::is_MP()) {
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366 // force alignment of patch sites on MP hardware so we
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367 // can guarantee atomic writes to the patch site.
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368 align_patch_site(masm);
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369 }
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370 _pc_start = masm->pc();
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371 masm->bind(_patch_site_entry);
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372 }
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373
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374 void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
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375 _info = info;
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376 _obj = obj;
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377 masm->bind(_patch_site_continuation);
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378 _bytes_to_copy = masm->pc() - pc_start();
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379 if (_id == PatchingStub::access_field_id) {
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380 // embed a fixed offset to handle long patches which need to be offset by a word.
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381 // the patching code will just add the field offset field to this offset so
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382 // that we can refernce either the high or low word of a double word field.
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383 int field_offset = 0;
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384 switch (patch_code) {
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385 case lir_patch_low: field_offset = lo_word_offset_in_bytes; break;
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386 case lir_patch_high: field_offset = hi_word_offset_in_bytes; break;
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387 case lir_patch_normal: field_offset = 0; break;
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388 default: ShouldNotReachHere();
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389 }
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390 NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start());
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391 n_move->set_offset(field_offset);
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392 } else if (_id == load_klass_id) {
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393 assert(_obj != noreg, "must have register object for load_klass");
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394 #ifdef ASSERT
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395 // verify that we're pointing at a NativeMovConstReg
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396 nativeMovConstReg_at(pc_start());
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397 #endif
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398 } else {
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399 ShouldNotReachHere();
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400 }
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401 assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes");
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402 }
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403
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404 address pc_start() const { return _pc_start; }
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405 PatchID id() const { return _id; }
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406
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407 virtual void emit_code(LIR_Assembler* e);
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408 virtual CodeEmitInfo* info() const { return _info; }
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409 virtual void visit(LIR_OpVisitState* visitor) {
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410 visitor->do_slow_case(_info);
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411 }
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412 #ifndef PRODUCT
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413 virtual void print_name(outputStream* out) const { out->print("PatchingStub"); }
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414 #endif // PRODUCT
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415 };
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416
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417
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1295
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418 //------------------------------------------------------------------------------
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419 // DeoptimizeStub
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420 //
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421 class DeoptimizeStub : public CodeStub {
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422 private:
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423 CodeEmitInfo* _info;
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424
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425 public:
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426 DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(info)) {}
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427
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428 virtual void emit_code(LIR_Assembler* e);
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429 virtual CodeEmitInfo* info() const { return _info; }
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430 virtual bool is_exception_throw_stub() const { return true; }
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431 virtual void visit(LIR_OpVisitState* visitor) {
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432 visitor->do_slow_case(_info);
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433 }
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434 #ifndef PRODUCT
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435 virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); }
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436 #endif // PRODUCT
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437 };
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438
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439
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0
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440 class SimpleExceptionStub: public CodeStub {
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441 private:
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442 LIR_Opr _obj;
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443 Runtime1::StubID _stub;
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444 CodeEmitInfo* _info;
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445
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446 public:
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447 SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info):
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448 _obj(obj), _info(info), _stub(stub) {
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449 }
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450
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451 virtual void emit_code(LIR_Assembler* e);
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452 virtual CodeEmitInfo* info() const { return _info; }
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453 virtual bool is_exception_throw_stub() const { return true; }
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454 virtual void visit(LIR_OpVisitState* visitor) {
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455 if (_obj->is_valid()) visitor->do_input(_obj);
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456 visitor->do_slow_case(_info);
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457 }
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458 #ifndef PRODUCT
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459 virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); }
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460 #endif // PRODUCT
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461 };
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462
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463
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464
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465 class ArrayStoreExceptionStub: public CodeStub {
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466 private:
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467 CodeEmitInfo* _info;
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468
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469 public:
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470 ArrayStoreExceptionStub(CodeEmitInfo* info);
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471 virtual void emit_code(LIR_Assembler* emit);
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472 virtual CodeEmitInfo* info() const { return _info; }
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473 virtual bool is_exception_throw_stub() const { return true; }
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474 virtual void visit(LIR_OpVisitState* visitor) {
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475 visitor->do_slow_case(_info);
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476 }
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477 #ifndef PRODUCT
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478 virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); }
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479 #endif // PRODUCT
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480 };
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481
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482
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483 class ArrayCopyStub: public CodeStub {
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484 private:
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485 LIR_OpArrayCopy* _op;
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486
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487 public:
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488 ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { }
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489
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490 LIR_Opr src() const { return _op->src(); }
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491 LIR_Opr src_pos() const { return _op->src_pos(); }
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492 LIR_Opr dst() const { return _op->dst(); }
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493 LIR_Opr dst_pos() const { return _op->dst_pos(); }
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494 LIR_Opr length() const { return _op->length(); }
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495 LIR_Opr tmp() const { return _op->tmp(); }
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496
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497 virtual void emit_code(LIR_Assembler* e);
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498 virtual CodeEmitInfo* info() const { return _op->info(); }
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499 virtual void visit(LIR_OpVisitState* visitor) {
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500 // don't pass in the code emit info since it's processed in the fast path
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501 visitor->do_slow_case();
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502 }
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503 #ifndef PRODUCT
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504 virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); }
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505 #endif // PRODUCT
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506 };
|
|
342
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507
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|
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508 //////////////////////////////////////////////////////////////////////////////////////////
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|
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509 #ifndef SERIALGC
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510
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511 // Code stubs for Garbage-First barriers.
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512 class G1PreBarrierStub: public CodeStub {
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513 private:
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514 LIR_Opr _addr;
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515 LIR_Opr _pre_val;
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516 LIR_PatchCode _patch_code;
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517 CodeEmitInfo* _info;
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518
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519 public:
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520 // pre_val (a temporary register) must be a register;
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521 // addr (the address of the field to be read) must be a LIR_Address
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522 G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
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523 _addr(addr), _pre_val(pre_val), _patch_code(patch_code), _info(info)
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524 {
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525 assert(_pre_val->is_register(), "should be temporary register");
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526 assert(_addr->is_address(), "should be the address of the field");
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527 }
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528
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529 LIR_Opr addr() const { return _addr; }
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530 LIR_Opr pre_val() const { return _pre_val; }
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|
531 LIR_PatchCode patch_code() const { return _patch_code; }
|
|
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532 CodeEmitInfo* info() const { return _info; }
|
|
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533
|
|
|
534 virtual void emit_code(LIR_Assembler* e);
|
|
|
535 virtual void visit(LIR_OpVisitState* visitor) {
|
|
|
536 // don't pass in the code emit info since it's processed in the fast
|
|
|
537 // path
|
|
|
538 if (_info != NULL)
|
|
|
539 visitor->do_slow_case(_info);
|
|
|
540 else
|
|
|
541 visitor->do_slow_case();
|
|
|
542 visitor->do_input(_addr);
|
|
|
543 visitor->do_temp(_pre_val);
|
|
|
544 }
|
|
|
545 #ifndef PRODUCT
|
|
|
546 virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
|
|
|
547 #endif // PRODUCT
|
|
|
548 };
|
|
|
549
|
|
|
550 class G1PostBarrierStub: public CodeStub {
|
|
|
551 private:
|
|
|
552 LIR_Opr _addr;
|
|
|
553 LIR_Opr _new_val;
|
|
|
554
|
|
|
555 static jbyte* _byte_map_base;
|
|
|
556 static jbyte* byte_map_base_slow();
|
|
|
557 static jbyte* byte_map_base() {
|
|
|
558 if (_byte_map_base == NULL) {
|
|
|
559 _byte_map_base = byte_map_base_slow();
|
|
|
560 }
|
|
|
561 return _byte_map_base;
|
|
|
562 }
|
|
|
563
|
|
|
564 public:
|
|
|
565 // addr (the address of the object head) and new_val must be registers.
|
|
|
566 G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
|
|
|
567
|
|
|
568 LIR_Opr addr() const { return _addr; }
|
|
|
569 LIR_Opr new_val() const { return _new_val; }
|
|
|
570
|
|
|
571 virtual void emit_code(LIR_Assembler* e);
|
|
|
572 virtual void visit(LIR_OpVisitState* visitor) {
|
|
|
573 // don't pass in the code emit info since it's processed in the fast path
|
|
|
574 visitor->do_slow_case();
|
|
|
575 visitor->do_input(_addr);
|
|
|
576 visitor->do_input(_new_val);
|
|
|
577 }
|
|
|
578 #ifndef PRODUCT
|
|
|
579 virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
|
|
|
580 #endif // PRODUCT
|
|
|
581 };
|
|
|
582
|
|
|
583 #endif // SERIALGC
|
|
|
584 //////////////////////////////////////////////////////////////////////////////////////////
|
