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1 /* |
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2 * Copyright (c) 1997, 2014, 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 #include "precompiled.hpp" |
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26 #include "classfile/systemDictionary.hpp" |
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27 #include "classfile/vmSymbols.hpp" |
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28 #include "compiler/compileBroker.hpp" |
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29 #include "compiler/disassembler.hpp" |
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30 #include "gc_interface/collectedHeap.hpp" |
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31 #include "interpreter/interpreter.hpp" |
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32 #include "interpreter/interpreterRuntime.hpp" |
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33 #include "interpreter/linkResolver.hpp" |
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34 #include "interpreter/templateTable.hpp" |
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35 #include "memory/oopFactory.hpp" |
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36 #include "memory/universe.inline.hpp" |
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37 #include "oops/constantPool.hpp" |
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38 #include "oops/instanceKlass.hpp" |
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39 #include "oops/methodData.hpp" |
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40 #include "oops/objArrayKlass.hpp" |
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41 #include "oops/oop.inline.hpp" |
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42 #include "oops/symbol.hpp" |
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43 #include "prims/jvmtiExport.hpp" |
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44 #include "prims/nativeLookup.hpp" |
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45 #include "runtime/biasedLocking.hpp" |
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46 #include "runtime/compilationPolicy.hpp" |
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47 #include "runtime/deoptimization.hpp" |
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48 #include "runtime/fieldDescriptor.hpp" |
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49 #include "runtime/handles.inline.hpp" |
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50 #include "runtime/interfaceSupport.hpp" |
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51 #include "runtime/java.hpp" |
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52 #include "runtime/jfieldIDWorkaround.hpp" |
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53 #include "runtime/osThread.hpp" |
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54 #include "runtime/sharedRuntime.hpp" |
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55 #include "runtime/stubRoutines.hpp" |
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56 #include "runtime/synchronizer.hpp" |
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57 #include "runtime/threadCritical.hpp" |
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58 #include "utilities/events.hpp" |
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59 #ifdef TARGET_ARCH_x86 |
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60 # include "vm_version_x86.hpp" |
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61 #endif |
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62 #ifdef TARGET_ARCH_sparc |
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63 # include "vm_version_sparc.hpp" |
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64 #endif |
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65 #ifdef TARGET_ARCH_zero |
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66 # include "vm_version_zero.hpp" |
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67 #endif |
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68 #ifdef TARGET_ARCH_arm |
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69 # include "vm_version_arm.hpp" |
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70 #endif |
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71 #ifdef TARGET_ARCH_ppc |
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72 # include "vm_version_ppc.hpp" |
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73 #endif |
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74 #ifdef COMPILER2 |
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75 #include "opto/runtime.hpp" |
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76 #endif |
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77 |
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78 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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79 |
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80 class UnlockFlagSaver { |
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81 private: |
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82 JavaThread* _thread; |
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83 bool _do_not_unlock; |
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84 public: |
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85 UnlockFlagSaver(JavaThread* t) { |
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86 _thread = t; |
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87 _do_not_unlock = t->do_not_unlock_if_synchronized(); |
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88 t->set_do_not_unlock_if_synchronized(false); |
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89 } |
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90 ~UnlockFlagSaver() { |
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91 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); |
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92 } |
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93 }; |
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94 |
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95 //------------------------------------------------------------------------------------------------------------------------ |
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96 // State accessors |
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97 |
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98 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { |
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99 last_frame(thread).interpreter_frame_set_bcp(bcp); |
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100 if (ProfileInterpreter) { |
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101 // ProfileTraps uses MDOs independently of ProfileInterpreter. |
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102 // That is why we must check both ProfileInterpreter and mdo != NULL. |
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103 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); |
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104 if (mdo != NULL) { |
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105 NEEDS_CLEANUP; |
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106 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); |
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107 } |
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108 } |
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109 } |
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110 |
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111 //------------------------------------------------------------------------------------------------------------------------ |
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112 // Constants |
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113 |
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114 |
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115 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) |
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116 // access constant pool |
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117 ConstantPool* pool = method(thread)->constants(); |
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118 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); |
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119 constantTag tag = pool->tag_at(index); |
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120 |
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121 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); |
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122 Klass* klass = pool->klass_at(index, CHECK); |
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123 oop java_class = klass->java_mirror(); |
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124 thread->set_vm_result(java_class); |
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125 IRT_END |
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126 |
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127 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { |
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128 assert(bytecode == Bytecodes::_fast_aldc || |
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129 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); |
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130 ResourceMark rm(thread); |
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131 methodHandle m (thread, method(thread)); |
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132 Bytecode_loadconstant ldc(m, bci(thread)); |
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133 oop result = ldc.resolve_constant(CHECK); |
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134 #ifdef ASSERT |
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135 { |
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136 // The bytecode wrappers aren't GC-safe so construct a new one |
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137 Bytecode_loadconstant ldc2(m, bci(thread)); |
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138 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); |
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139 assert(result == coop, "expected result for assembly code"); |
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140 } |
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141 #endif |
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142 thread->set_vm_result(result); |
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143 } |
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144 IRT_END |
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145 |
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146 |
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147 //------------------------------------------------------------------------------------------------------------------------ |
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148 // Allocation |
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149 |
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150 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) |
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151 Klass* k_oop = pool->klass_at(index, CHECK); |
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152 instanceKlassHandle klass (THREAD, k_oop); |
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153 |
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154 // Make sure we are not instantiating an abstract klass |
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155 klass->check_valid_for_instantiation(true, CHECK); |
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156 |
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157 // Make sure klass is initialized |
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158 klass->initialize(CHECK); |
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159 |
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160 // At this point the class may not be fully initialized |
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161 // because of recursive initialization. If it is fully |
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162 // initialized & has_finalized is not set, we rewrite |
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163 // it into its fast version (Note: no locking is needed |
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164 // here since this is an atomic byte write and can be |
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165 // done more than once). |
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166 // |
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167 // Note: In case of classes with has_finalized we don't |
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168 // rewrite since that saves us an extra check in |
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169 // the fast version which then would call the |
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170 // slow version anyway (and do a call back into |
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171 // Java). |
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172 // If we have a breakpoint, then we don't rewrite |
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173 // because the _breakpoint bytecode would be lost. |
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174 oop obj = klass->allocate_instance(CHECK); |
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175 thread->set_vm_result(obj); |
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176 IRT_END |
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177 |
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178 |
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179 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) |
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180 oop obj = oopFactory::new_typeArray(type, size, CHECK); |
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181 thread->set_vm_result(obj); |
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182 IRT_END |
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183 |
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184 |
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185 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) |
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186 // Note: no oopHandle for pool & klass needed since they are not used |
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187 // anymore after new_objArray() and no GC can happen before. |
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188 // (This may have to change if this code changes!) |
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189 Klass* klass = pool->klass_at(index, CHECK); |
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190 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); |
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191 thread->set_vm_result(obj); |
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192 IRT_END |
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193 |
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194 |
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195 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) |
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196 // We may want to pass in more arguments - could make this slightly faster |
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197 ConstantPool* constants = method(thread)->constants(); |
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198 int i = get_index_u2(thread, Bytecodes::_multianewarray); |
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199 Klass* klass = constants->klass_at(i, CHECK); |
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200 int nof_dims = number_of_dimensions(thread); |
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201 assert(klass->is_klass(), "not a class"); |
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202 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); |
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203 |
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204 // We must create an array of jints to pass to multi_allocate. |
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205 ResourceMark rm(thread); |
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206 const int small_dims = 10; |
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207 jint dim_array[small_dims]; |
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208 jint *dims = &dim_array[0]; |
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209 if (nof_dims > small_dims) { |
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210 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); |
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211 } |
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212 for (int index = 0; index < nof_dims; index++) { |
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213 // offset from first_size_address is addressed as local[index] |
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214 int n = Interpreter::local_offset_in_bytes(index)/jintSize; |
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215 dims[index] = first_size_address[n]; |
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216 } |
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217 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); |
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218 thread->set_vm_result(obj); |
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219 IRT_END |
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220 |
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221 |
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222 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) |
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223 assert(obj->is_oop(), "must be a valid oop"); |
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224 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); |
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225 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); |
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226 IRT_END |
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227 |
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228 |
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229 // Quicken instance-of and check-cast bytecodes |
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230 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) |
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231 // Force resolving; quicken the bytecode |
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232 int which = get_index_u2(thread, Bytecodes::_checkcast); |
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233 ConstantPool* cpool = method(thread)->constants(); |
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234 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded |
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235 // program we might have seen an unquick'd bytecode in the interpreter but have another |
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236 // thread quicken the bytecode before we get here. |
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237 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); |
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238 Klass* klass = cpool->klass_at(which, CHECK); |
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239 thread->set_vm_result_2(klass); |
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240 IRT_END |
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241 |
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242 |
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243 //------------------------------------------------------------------------------------------------------------------------ |
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244 // Exceptions |
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245 |
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246 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, |
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247 methodHandle trap_method, int trap_bci, TRAPS) { |
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248 if (trap_method.not_null()) { |
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249 MethodData* trap_mdo = trap_method->method_data(); |
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250 if (trap_mdo == NULL) { |
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251 Method::build_interpreter_method_data(trap_method, THREAD); |
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252 if (HAS_PENDING_EXCEPTION) { |
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253 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), |
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254 "we expect only an OOM error here"); |
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255 CLEAR_PENDING_EXCEPTION; |
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256 } |
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257 trap_mdo = trap_method->method_data(); |
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258 // and fall through... |
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259 } |
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260 if (trap_mdo != NULL) { |
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261 // Update per-method count of trap events. The interpreter |
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262 // is updating the MDO to simulate the effect of compiler traps. |
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263 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); |
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264 } |
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265 } |
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266 } |
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267 |
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268 // Assume the compiler is (or will be) interested in this event. |
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269 // If necessary, create an MDO to hold the information, and record it. |
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270 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { |
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271 assert(ProfileTraps, "call me only if profiling"); |
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272 methodHandle trap_method(thread, method(thread)); |
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273 int trap_bci = trap_method->bci_from(bcp(thread)); |
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274 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); |
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275 } |
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276 |
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277 #ifdef CC_INTERP |
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278 // As legacy note_trap, but we have more arguments. |
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279 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) |
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280 methodHandle trap_method(method); |
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281 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); |
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282 IRT_END |
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283 |
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284 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper |
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285 // for each exception. |
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286 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) |
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287 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } |
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288 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) |
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289 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } |
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290 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) |
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291 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } |
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292 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) |
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293 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } |
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294 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) |
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295 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } |
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296 #endif // CC_INTERP |
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297 |
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298 |
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299 static Handle get_preinitialized_exception(Klass* k, TRAPS) { |
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300 // get klass |
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301 InstanceKlass* klass = InstanceKlass::cast(k); |
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302 assert(klass->is_initialized(), |
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303 "this klass should have been initialized during VM initialization"); |
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304 // create instance - do not call constructor since we may have no |
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305 // (java) stack space left (should assert constructor is empty) |
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306 Handle exception; |
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307 oop exception_oop = klass->allocate_instance(CHECK_(exception)); |
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308 exception = Handle(THREAD, exception_oop); |
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309 if (StackTraceInThrowable) { |
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310 java_lang_Throwable::fill_in_stack_trace(exception); |
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311 } |
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312 return exception; |
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313 } |
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314 |
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315 // Special handling for stack overflow: since we don't have any (java) stack |
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316 // space left we use the pre-allocated & pre-initialized StackOverflowError |
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317 // klass to create an stack overflow error instance. We do not call its |
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318 // constructor for the same reason (it is empty, anyway). |
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319 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) |
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320 Handle exception = get_preinitialized_exception( |
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321 SystemDictionary::StackOverflowError_klass(), |
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322 CHECK); |
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323 THROW_HANDLE(exception); |
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324 IRT_END |
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325 |
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326 |
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327 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) |
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328 // lookup exception klass |
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329 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); |
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330 if (ProfileTraps) { |
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331 if (s == vmSymbols::java_lang_ArithmeticException()) { |
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332 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); |
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333 } else if (s == vmSymbols::java_lang_NullPointerException()) { |
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334 note_trap(thread, Deoptimization::Reason_null_check, CHECK); |
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335 } |
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336 } |
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337 // create exception |
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338 Handle exception = Exceptions::new_exception(thread, s, message); |
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339 thread->set_vm_result(exception()); |
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340 IRT_END |
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341 |
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342 |
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343 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) |
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344 ResourceMark rm(thread); |
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345 const char* klass_name = obj->klass()->external_name(); |
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346 // lookup exception klass |
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347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); |
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348 if (ProfileTraps) { |
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349 note_trap(thread, Deoptimization::Reason_class_check, CHECK); |
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350 } |
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351 // create exception, with klass name as detail message |
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352 Handle exception = Exceptions::new_exception(thread, s, klass_name); |
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353 thread->set_vm_result(exception()); |
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354 IRT_END |
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355 |
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356 |
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357 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) |
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358 char message[jintAsStringSize]; |
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359 // lookup exception klass |
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360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); |
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361 if (ProfileTraps) { |
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362 note_trap(thread, Deoptimization::Reason_range_check, CHECK); |
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363 } |
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364 // create exception |
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365 sprintf(message, "%d", index); |
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366 THROW_MSG(s, message); |
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367 IRT_END |
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368 |
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369 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( |
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370 JavaThread* thread, oopDesc* obj)) |
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371 |
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372 ResourceMark rm(thread); |
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373 char* message = SharedRuntime::generate_class_cast_message( |
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374 thread, obj->klass()->external_name()); |
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375 |
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376 if (ProfileTraps) { |
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377 note_trap(thread, Deoptimization::Reason_class_check, CHECK); |
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378 } |
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379 |
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380 // create exception |
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381 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); |
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382 IRT_END |
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383 |
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384 // exception_handler_for_exception(...) returns the continuation address, |
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385 // the exception oop (via TLS) and sets the bci/bcp for the continuation. |
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386 // The exception oop is returned to make sure it is preserved over GC (it |
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387 // is only on the stack if the exception was thrown explicitly via athrow). |
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388 // During this operation, the expression stack contains the values for the |
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389 // bci where the exception happened. If the exception was propagated back |
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390 // from a call, the expression stack contains the values for the bci at the |
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391 // invoke w/o arguments (i.e., as if one were inside the call). |
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392 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) |
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393 |
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394 Handle h_exception(thread, exception); |
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395 methodHandle h_method (thread, method(thread)); |
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396 constantPoolHandle h_constants(thread, h_method->constants()); |
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397 bool should_repeat; |
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398 int handler_bci; |
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399 int current_bci = bci(thread); |
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400 |
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401 // Need to do this check first since when _do_not_unlock_if_synchronized |
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402 // is set, we don't want to trigger any classloading which may make calls |
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403 // into java, or surprisingly find a matching exception handler for bci 0 |
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404 // since at this moment the method hasn't been "officially" entered yet. |
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405 if (thread->do_not_unlock_if_synchronized()) { |
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406 ResourceMark rm; |
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407 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); |
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408 thread->set_vm_result(exception); |
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409 #ifdef CC_INTERP |
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410 return (address) -1; |
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411 #else |
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412 return Interpreter::remove_activation_entry(); |
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413 #endif |
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414 } |
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415 |
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416 do { |
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417 should_repeat = false; |
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418 |
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419 // assertions |
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420 #ifdef ASSERT |
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421 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); |
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422 assert(h_exception->is_oop(), "just checking"); |
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423 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError |
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424 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
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425 if (ExitVMOnVerifyError) vm_exit(-1); |
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426 ShouldNotReachHere(); |
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427 } |
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428 #endif |
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429 |
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430 // tracing |
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431 if (TraceExceptions) { |
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432 ttyLocker ttyl; |
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433 ResourceMark rm(thread); |
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434 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); |
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435 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); |
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436 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); |
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437 } |
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438 // Don't go paging in something which won't be used. |
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439 // else if (extable->length() == 0) { |
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440 // // disabled for now - interpreter is not using shortcut yet |
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441 // // (shortcut is not to call runtime if we have no exception handlers) |
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442 // // warning("performance bug: should not call runtime if method has no exception handlers"); |
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443 // } |
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444 // for AbortVMOnException flag |
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445 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); |
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446 |
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447 // exception handler lookup |
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448 KlassHandle h_klass(THREAD, h_exception->klass()); |
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449 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); |
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450 if (HAS_PENDING_EXCEPTION) { |
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451 // We threw an exception while trying to find the exception handler. |
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452 // Transfer the new exception to the exception handle which will |
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453 // be set into thread local storage, and do another lookup for an |
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454 // exception handler for this exception, this time starting at the |
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455 // BCI of the exception handler which caused the exception to be |
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456 // thrown (bug 4307310). |
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457 h_exception = Handle(THREAD, PENDING_EXCEPTION); |
|
458 CLEAR_PENDING_EXCEPTION; |
|
459 if (handler_bci >= 0) { |
|
460 current_bci = handler_bci; |
|
461 should_repeat = true; |
|
462 } |
|
463 } |
|
464 } while (should_repeat == true); |
|
465 |
|
466 // notify JVMTI of an exception throw; JVMTI will detect if this is a first |
|
467 // time throw or a stack unwinding throw and accordingly notify the debugger |
|
468 if (JvmtiExport::can_post_on_exceptions()) { |
|
469 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
|
470 } |
|
471 |
|
472 #ifdef CC_INTERP |
|
473 address continuation = (address)(intptr_t) handler_bci; |
|
474 #else |
|
475 address continuation = NULL; |
|
476 #endif |
|
477 address handler_pc = NULL; |
|
478 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { |
|
479 // Forward exception to callee (leaving bci/bcp untouched) because (a) no |
|
480 // handler in this method, or (b) after a stack overflow there is not yet |
|
481 // enough stack space available to reprotect the stack. |
|
482 #ifndef CC_INTERP |
|
483 continuation = Interpreter::remove_activation_entry(); |
|
484 #endif |
|
485 // Count this for compilation purposes |
|
486 h_method->interpreter_throwout_increment(THREAD); |
|
487 } else { |
|
488 // handler in this method => change bci/bcp to handler bci/bcp and continue there |
|
489 handler_pc = h_method->code_base() + handler_bci; |
|
490 #ifndef CC_INTERP |
|
491 set_bcp_and_mdp(handler_pc, thread); |
|
492 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; |
|
493 #endif |
|
494 } |
|
495 // notify debugger of an exception catch |
|
496 // (this is good for exceptions caught in native methods as well) |
|
497 if (JvmtiExport::can_post_on_exceptions()) { |
|
498 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
|
499 } |
|
500 |
|
501 thread->set_vm_result(h_exception()); |
|
502 return continuation; |
|
503 IRT_END |
|
504 |
|
505 |
|
506 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) |
|
507 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); |
|
508 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) |
|
509 IRT_END |
|
510 |
|
511 |
|
512 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) |
|
513 THROW(vmSymbols::java_lang_AbstractMethodError()); |
|
514 IRT_END |
|
515 |
|
516 |
|
517 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
|
518 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); |
|
519 IRT_END |
|
520 |
|
521 |
|
522 //------------------------------------------------------------------------------------------------------------------------ |
|
523 // Fields |
|
524 // |
|
525 |
|
526 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) |
|
527 // resolve field |
|
528 fieldDescriptor info; |
|
529 constantPoolHandle pool(thread, method(thread)->constants()); |
|
530 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic); |
|
531 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); |
|
532 |
|
533 { |
|
534 JvmtiHideSingleStepping jhss(thread); |
|
535 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), |
|
536 bytecode, CHECK); |
|
537 } // end JvmtiHideSingleStepping |
|
538 |
|
539 // check if link resolution caused cpCache to be updated |
|
540 if (already_resolved(thread)) return; |
|
541 |
|
542 // compute auxiliary field attributes |
|
543 TosState state = as_TosState(info.field_type()); |
|
544 |
|
545 // We need to delay resolving put instructions on final fields |
|
546 // until we actually invoke one. This is required so we throw |
|
547 // exceptions at the correct place. If we do not resolve completely |
|
548 // in the current pass, leaving the put_code set to zero will |
|
549 // cause the next put instruction to reresolve. |
|
550 Bytecodes::Code put_code = (Bytecodes::Code)0; |
|
551 |
|
552 // We also need to delay resolving getstatic instructions until the |
|
553 // class is intitialized. This is required so that access to the static |
|
554 // field will call the initialization function every time until the class |
|
555 // is completely initialized ala. in 2.17.5 in JVM Specification. |
|
556 InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); |
|
557 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && |
|
558 !klass->is_initialized()); |
|
559 Bytecodes::Code get_code = (Bytecodes::Code)0; |
|
560 |
|
561 if (!uninitialized_static) { |
|
562 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); |
|
563 if (is_put || !info.access_flags().is_final()) { |
|
564 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); |
|
565 } |
|
566 } |
|
567 |
|
568 cache_entry(thread)->set_field( |
|
569 get_code, |
|
570 put_code, |
|
571 info.field_holder(), |
|
572 info.index(), |
|
573 info.offset(), |
|
574 state, |
|
575 info.access_flags().is_final(), |
|
576 info.access_flags().is_volatile(), |
|
577 pool->pool_holder() |
|
578 ); |
|
579 IRT_END |
|
580 |
|
581 |
|
582 //------------------------------------------------------------------------------------------------------------------------ |
|
583 // Synchronization |
|
584 // |
|
585 // The interpreter's synchronization code is factored out so that it can |
|
586 // be shared by method invocation and synchronized blocks. |
|
587 //%note synchronization_3 |
|
588 |
|
589 //%note monitor_1 |
|
590 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) |
|
591 #ifdef ASSERT |
|
592 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
593 #endif |
|
594 if (PrintBiasedLockingStatistics) { |
|
595 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); |
|
596 } |
|
597 Handle h_obj(thread, elem->obj()); |
|
598 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), |
|
599 "must be NULL or an object"); |
|
600 if (UseBiasedLocking) { |
|
601 // Retry fast entry if bias is revoked to avoid unnecessary inflation |
|
602 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); |
|
603 } else { |
|
604 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); |
|
605 } |
|
606 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), |
|
607 "must be NULL or an object"); |
|
608 #ifdef ASSERT |
|
609 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
610 #endif |
|
611 IRT_END |
|
612 |
|
613 |
|
614 //%note monitor_1 |
|
615 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) |
|
616 #ifdef ASSERT |
|
617 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
618 #endif |
|
619 Handle h_obj(thread, elem->obj()); |
|
620 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), |
|
621 "must be NULL or an object"); |
|
622 if (elem == NULL || h_obj()->is_unlocked()) { |
|
623 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); |
|
624 } |
|
625 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); |
|
626 // Free entry. This must be done here, since a pending exception might be installed on |
|
627 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. |
|
628 elem->set_obj(NULL); |
|
629 #ifdef ASSERT |
|
630 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
631 #endif |
|
632 IRT_END |
|
633 |
|
634 |
|
635 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) |
|
636 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); |
|
637 IRT_END |
|
638 |
|
639 |
|
640 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) |
|
641 // Returns an illegal exception to install into the current thread. The |
|
642 // pending_exception flag is cleared so normal exception handling does not |
|
643 // trigger. Any current installed exception will be overwritten. This |
|
644 // method will be called during an exception unwind. |
|
645 |
|
646 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); |
|
647 Handle exception(thread, thread->vm_result()); |
|
648 assert(exception() != NULL, "vm result should be set"); |
|
649 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) |
|
650 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
|
651 exception = get_preinitialized_exception( |
|
652 SystemDictionary::IllegalMonitorStateException_klass(), |
|
653 CATCH); |
|
654 } |
|
655 thread->set_vm_result(exception()); |
|
656 IRT_END |
|
657 |
|
658 |
|
659 //------------------------------------------------------------------------------------------------------------------------ |
|
660 // Invokes |
|
661 |
|
662 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) |
|
663 return method->orig_bytecode_at(method->bci_from(bcp)); |
|
664 IRT_END |
|
665 |
|
666 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) |
|
667 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); |
|
668 IRT_END |
|
669 |
|
670 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) |
|
671 JvmtiExport::post_raw_breakpoint(thread, method, bcp); |
|
672 IRT_END |
|
673 |
|
674 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) { |
|
675 // extract receiver from the outgoing argument list if necessary |
|
676 Handle receiver(thread, NULL); |
|
677 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { |
|
678 ResourceMark rm(thread); |
|
679 methodHandle m (thread, method(thread)); |
|
680 Bytecode_invoke call(m, bci(thread)); |
|
681 Symbol* signature = call.signature(); |
|
682 receiver = Handle(thread, |
|
683 thread->last_frame().interpreter_callee_receiver(signature)); |
|
684 assert(Universe::heap()->is_in_reserved_or_null(receiver()), |
|
685 "sanity check"); |
|
686 assert(receiver.is_null() || |
|
687 !Universe::heap()->is_in_reserved(receiver->klass()), |
|
688 "sanity check"); |
|
689 } |
|
690 |
|
691 // resolve method |
|
692 CallInfo info; |
|
693 constantPoolHandle pool(thread, method(thread)->constants()); |
|
694 |
|
695 { |
|
696 JvmtiHideSingleStepping jhss(thread); |
|
697 LinkResolver::resolve_invoke(info, receiver, pool, |
|
698 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
|
699 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
|
700 int retry_count = 0; |
|
701 while (info.resolved_method()->is_old()) { |
|
702 // It is very unlikely that method is redefined more than 100 times |
|
703 // in the middle of resolve. If it is looping here more than 100 times |
|
704 // means then there could be a bug here. |
|
705 guarantee((retry_count++ < 100), |
|
706 "Could not resolve to latest version of redefined method"); |
|
707 // method is redefined in the middle of resolve so re-try. |
|
708 LinkResolver::resolve_invoke(info, receiver, pool, |
|
709 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
|
710 } |
|
711 } |
|
712 } // end JvmtiHideSingleStepping |
|
713 |
|
714 // check if link resolution caused cpCache to be updated |
|
715 if (already_resolved(thread)) return; |
|
716 |
|
717 if (bytecode == Bytecodes::_invokeinterface) { |
|
718 if (TraceItables && Verbose) { |
|
719 ResourceMark rm(thread); |
|
720 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); |
|
721 } |
|
722 } |
|
723 #ifdef ASSERT |
|
724 if (bytecode == Bytecodes::_invokeinterface) { |
|
725 if (info.resolved_method()->method_holder() == |
|
726 SystemDictionary::Object_klass()) { |
|
727 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
|
728 // (see also CallInfo::set_interface for details) |
|
729 assert(info.call_kind() == CallInfo::vtable_call || |
|
730 info.call_kind() == CallInfo::direct_call, ""); |
|
731 methodHandle rm = info.resolved_method(); |
|
732 assert(rm->is_final() || info.has_vtable_index(), |
|
733 "should have been set already"); |
|
734 } else if (!info.resolved_method()->has_itable_index()) { |
|
735 // Resolved something like CharSequence.toString. Use vtable not itable. |
|
736 assert(info.call_kind() != CallInfo::itable_call, ""); |
|
737 } else { |
|
738 // Setup itable entry |
|
739 assert(info.call_kind() == CallInfo::itable_call, ""); |
|
740 int index = info.resolved_method()->itable_index(); |
|
741 assert(info.itable_index() == index, ""); |
|
742 } |
|
743 } else { |
|
744 assert(info.call_kind() == CallInfo::direct_call || |
|
745 info.call_kind() == CallInfo::vtable_call, ""); |
|
746 } |
|
747 #endif |
|
748 switch (info.call_kind()) { |
|
749 case CallInfo::direct_call: |
|
750 cache_entry(thread)->set_direct_call( |
|
751 bytecode, |
|
752 info.resolved_method()); |
|
753 break; |
|
754 case CallInfo::vtable_call: |
|
755 cache_entry(thread)->set_vtable_call( |
|
756 bytecode, |
|
757 info.resolved_method(), |
|
758 info.vtable_index()); |
|
759 break; |
|
760 case CallInfo::itable_call: |
|
761 cache_entry(thread)->set_itable_call( |
|
762 bytecode, |
|
763 info.resolved_method(), |
|
764 info.itable_index()); |
|
765 break; |
|
766 default: ShouldNotReachHere(); |
|
767 } |
|
768 } |
|
769 IRT_END |
|
770 |
|
771 |
|
772 // First time execution: Resolve symbols, create a permanent MethodType object. |
|
773 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) { |
|
774 assert(EnableInvokeDynamic, ""); |
|
775 const Bytecodes::Code bytecode = Bytecodes::_invokehandle; |
|
776 |
|
777 // resolve method |
|
778 CallInfo info; |
|
779 constantPoolHandle pool(thread, method(thread)->constants()); |
|
780 |
|
781 { |
|
782 JvmtiHideSingleStepping jhss(thread); |
|
783 LinkResolver::resolve_invoke(info, Handle(), pool, |
|
784 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
|
785 } // end JvmtiHideSingleStepping |
|
786 |
|
787 cache_entry(thread)->set_method_handle(pool, info); |
|
788 } |
|
789 IRT_END |
|
790 |
|
791 |
|
792 // First time execution: Resolve symbols, create a permanent CallSite object. |
|
793 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
|
794 assert(EnableInvokeDynamic, ""); |
|
795 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
|
796 |
|
797 //TO DO: consider passing BCI to Java. |
|
798 // int caller_bci = method(thread)->bci_from(bcp(thread)); |
|
799 |
|
800 // resolve method |
|
801 CallInfo info; |
|
802 constantPoolHandle pool(thread, method(thread)->constants()); |
|
803 int index = get_index_u4(thread, bytecode); |
|
804 { |
|
805 JvmtiHideSingleStepping jhss(thread); |
|
806 LinkResolver::resolve_invoke(info, Handle(), pool, |
|
807 index, bytecode, CHECK); |
|
808 } // end JvmtiHideSingleStepping |
|
809 |
|
810 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); |
|
811 cp_cache_entry->set_dynamic_call(pool, info); |
|
812 } |
|
813 IRT_END |
|
814 |
|
815 |
|
816 //------------------------------------------------------------------------------------------------------------------------ |
|
817 // Miscellaneous |
|
818 |
|
819 |
|
820 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
|
821 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); |
|
822 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); |
|
823 if (branch_bcp != NULL && nm != NULL) { |
|
824 // This was a successful request for an OSR nmethod. Because |
|
825 // frequency_counter_overflow_inner ends with a safepoint check, |
|
826 // nm could have been unloaded so look it up again. It's unsafe |
|
827 // to examine nm directly since it might have been freed and used |
|
828 // for something else. |
|
829 frame fr = thread->last_frame(); |
|
830 Method* method = fr.interpreter_frame_method(); |
|
831 int bci = method->bci_from(fr.interpreter_frame_bcp()); |
|
832 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); |
|
833 } |
|
834 #ifndef PRODUCT |
|
835 if (TraceOnStackReplacement) { |
|
836 if (nm != NULL) { |
|
837 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry()); |
|
838 nm->print(); |
|
839 } |
|
840 } |
|
841 #endif |
|
842 return nm; |
|
843 } |
|
844 |
|
845 IRT_ENTRY(nmethod*, |
|
846 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
|
847 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
|
848 // flag, in case this method triggers classloading which will call into Java. |
|
849 UnlockFlagSaver fs(thread); |
|
850 |
|
851 frame fr = thread->last_frame(); |
|
852 assert(fr.is_interpreted_frame(), "must come from interpreter"); |
|
853 methodHandle method(thread, fr.interpreter_frame_method()); |
|
854 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; |
|
855 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; |
|
856 |
|
857 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); |
|
858 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); |
|
859 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); |
|
860 |
|
861 if (osr_nm != NULL) { |
|
862 // We may need to do on-stack replacement which requires that no |
|
863 // monitors in the activation are biased because their |
|
864 // BasicObjectLocks will need to migrate during OSR. Force |
|
865 // unbiasing of all monitors in the activation now (even though |
|
866 // the OSR nmethod might be invalidated) because we don't have a |
|
867 // safepoint opportunity later once the migration begins. |
|
868 if (UseBiasedLocking) { |
|
869 ResourceMark rm; |
|
870 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); |
|
871 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); |
|
872 kptr < fr.interpreter_frame_monitor_begin(); |
|
873 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { |
|
874 if( kptr->obj() != NULL ) { |
|
875 objects_to_revoke->append(Handle(THREAD, kptr->obj())); |
|
876 } |
|
877 } |
|
878 BiasedLocking::revoke(objects_to_revoke); |
|
879 } |
|
880 } |
|
881 return osr_nm; |
|
882 IRT_END |
|
883 |
|
884 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) |
|
885 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
886 int bci = method->bci_from(cur_bcp); |
|
887 MethodData* mdo = method->method_data(); |
|
888 if (mdo == NULL) return 0; |
|
889 return mdo->bci_to_di(bci); |
|
890 IRT_END |
|
891 |
|
892 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) |
|
893 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
|
894 // flag, in case this method triggers classloading which will call into Java. |
|
895 UnlockFlagSaver fs(thread); |
|
896 |
|
897 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
898 frame fr = thread->last_frame(); |
|
899 assert(fr.is_interpreted_frame(), "must come from interpreter"); |
|
900 methodHandle method(thread, fr.interpreter_frame_method()); |
|
901 Method::build_interpreter_method_data(method, THREAD); |
|
902 if (HAS_PENDING_EXCEPTION) { |
|
903 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); |
|
904 CLEAR_PENDING_EXCEPTION; |
|
905 // and fall through... |
|
906 } |
|
907 IRT_END |
|
908 |
|
909 |
|
910 #ifdef ASSERT |
|
911 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) |
|
912 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
913 |
|
914 MethodData* mdo = method->method_data(); |
|
915 assert(mdo != NULL, "must not be null"); |
|
916 |
|
917 int bci = method->bci_from(bcp); |
|
918 |
|
919 address mdp2 = mdo->bci_to_dp(bci); |
|
920 if (mdp != mdp2) { |
|
921 ResourceMark rm; |
|
922 ResetNoHandleMark rnm; // In a LEAF entry. |
|
923 HandleMark hm; |
|
924 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); |
|
925 int current_di = mdo->dp_to_di(mdp); |
|
926 int expected_di = mdo->dp_to_di(mdp2); |
|
927 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); |
|
928 int expected_approx_bci = mdo->data_at(expected_di)->bci(); |
|
929 int approx_bci = -1; |
|
930 if (current_di >= 0) { |
|
931 approx_bci = mdo->data_at(current_di)->bci(); |
|
932 } |
|
933 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); |
|
934 mdo->print_on(tty); |
|
935 method->print_codes(); |
|
936 } |
|
937 assert(mdp == mdp2, "wrong mdp"); |
|
938 IRT_END |
|
939 #endif // ASSERT |
|
940 |
|
941 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) |
|
942 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
943 ResourceMark rm(thread); |
|
944 HandleMark hm(thread); |
|
945 frame fr = thread->last_frame(); |
|
946 assert(fr.is_interpreted_frame(), "must come from interpreter"); |
|
947 MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); |
|
948 |
|
949 // Grab a lock to ensure atomic access to setting the return bci and |
|
950 // the displacement. This can block and GC, invalidating all naked oops. |
|
951 MutexLocker ml(RetData_lock); |
|
952 |
|
953 // ProfileData is essentially a wrapper around a derived oop, so we |
|
954 // need to take the lock before making any ProfileData structures. |
|
955 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); |
|
956 RetData* rdata = data->as_RetData(); |
|
957 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); |
|
958 fr.interpreter_frame_set_mdp(new_mdp); |
|
959 IRT_END |
|
960 |
|
961 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) |
|
962 MethodCounters* mcs = Method::build_method_counters(m, thread); |
|
963 if (HAS_PENDING_EXCEPTION) { |
|
964 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); |
|
965 CLEAR_PENDING_EXCEPTION; |
|
966 } |
|
967 return mcs; |
|
968 IRT_END |
|
969 |
|
970 |
|
971 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) |
|
972 // We used to need an explict preserve_arguments here for invoke bytecodes. However, |
|
973 // stack traversal automatically takes care of preserving arguments for invoke, so |
|
974 // this is no longer needed. |
|
975 |
|
976 // IRT_END does an implicit safepoint check, hence we are guaranteed to block |
|
977 // if this is called during a safepoint |
|
978 |
|
979 if (JvmtiExport::should_post_single_step()) { |
|
980 // We are called during regular safepoints and when the VM is |
|
981 // single stepping. If any thread is marked for single stepping, |
|
982 // then we may have JVMTI work to do. |
|
983 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); |
|
984 } |
|
985 IRT_END |
|
986 |
|
987 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, |
|
988 ConstantPoolCacheEntry *cp_entry)) |
|
989 |
|
990 // check the access_flags for the field in the klass |
|
991 |
|
992 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); |
|
993 int index = cp_entry->field_index(); |
|
994 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; |
|
995 |
|
996 switch(cp_entry->flag_state()) { |
|
997 case btos: // fall through |
|
998 case ctos: // fall through |
|
999 case stos: // fall through |
|
1000 case itos: // fall through |
|
1001 case ftos: // fall through |
|
1002 case ltos: // fall through |
|
1003 case dtos: // fall through |
|
1004 case atos: break; |
|
1005 default: ShouldNotReachHere(); return; |
|
1006 } |
|
1007 bool is_static = (obj == NULL); |
|
1008 HandleMark hm(thread); |
|
1009 |
|
1010 Handle h_obj; |
|
1011 if (!is_static) { |
|
1012 // non-static field accessors have an object, but we need a handle |
|
1013 h_obj = Handle(thread, obj); |
|
1014 } |
|
1015 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); |
|
1016 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); |
|
1017 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); |
|
1018 IRT_END |
|
1019 |
|
1020 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, |
|
1021 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) |
|
1022 |
|
1023 Klass* k = (Klass*)cp_entry->f1_as_klass(); |
|
1024 |
|
1025 // check the access_flags for the field in the klass |
|
1026 InstanceKlass* ik = InstanceKlass::cast(k); |
|
1027 int index = cp_entry->field_index(); |
|
1028 // bail out if field modifications are not watched |
|
1029 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; |
|
1030 |
|
1031 char sig_type = '\0'; |
|
1032 |
|
1033 switch(cp_entry->flag_state()) { |
|
1034 case btos: sig_type = 'Z'; break; |
|
1035 case ctos: sig_type = 'C'; break; |
|
1036 case stos: sig_type = 'S'; break; |
|
1037 case itos: sig_type = 'I'; break; |
|
1038 case ftos: sig_type = 'F'; break; |
|
1039 case atos: sig_type = 'L'; break; |
|
1040 case ltos: sig_type = 'J'; break; |
|
1041 case dtos: sig_type = 'D'; break; |
|
1042 default: ShouldNotReachHere(); return; |
|
1043 } |
|
1044 bool is_static = (obj == NULL); |
|
1045 |
|
1046 HandleMark hm(thread); |
|
1047 instanceKlassHandle h_klass(thread, k); |
|
1048 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); |
|
1049 jvalue fvalue; |
|
1050 #ifdef _LP64 |
|
1051 fvalue = *value; |
|
1052 #else |
|
1053 // Long/double values are stored unaligned and also noncontiguously with |
|
1054 // tagged stacks. We can't just do a simple assignment even in the non- |
|
1055 // J/D cases because a C++ compiler is allowed to assume that a jvalue is |
|
1056 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. |
|
1057 // We assume that the two halves of longs/doubles are stored in interpreter |
|
1058 // stack slots in platform-endian order. |
|
1059 jlong_accessor u; |
|
1060 jint* newval = (jint*)value; |
|
1061 u.words[0] = newval[0]; |
|
1062 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag |
|
1063 fvalue.j = u.long_value; |
|
1064 #endif // _LP64 |
|
1065 |
|
1066 Handle h_obj; |
|
1067 if (!is_static) { |
|
1068 // non-static field accessors have an object, but we need a handle |
|
1069 h_obj = Handle(thread, obj); |
|
1070 } |
|
1071 |
|
1072 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, |
|
1073 fid, sig_type, &fvalue); |
|
1074 IRT_END |
|
1075 |
|
1076 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) |
|
1077 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); |
|
1078 IRT_END |
|
1079 |
|
1080 |
|
1081 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) |
|
1082 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); |
|
1083 IRT_END |
|
1084 |
|
1085 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) |
|
1086 { |
|
1087 return (Interpreter::contains(pc) ? 1 : 0); |
|
1088 } |
|
1089 IRT_END |
|
1090 |
|
1091 |
|
1092 // Implementation of SignatureHandlerLibrary |
|
1093 |
|
1094 address SignatureHandlerLibrary::set_handler_blob() { |
|
1095 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); |
|
1096 if (handler_blob == NULL) { |
|
1097 return NULL; |
|
1098 } |
|
1099 address handler = handler_blob->code_begin(); |
|
1100 _handler_blob = handler_blob; |
|
1101 _handler = handler; |
|
1102 return handler; |
|
1103 } |
|
1104 |
|
1105 void SignatureHandlerLibrary::initialize() { |
|
1106 if (_fingerprints != NULL) { |
|
1107 return; |
|
1108 } |
|
1109 if (set_handler_blob() == NULL) { |
|
1110 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); |
|
1111 } |
|
1112 |
|
1113 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", |
|
1114 SignatureHandlerLibrary::buffer_size); |
|
1115 _buffer = bb->code_begin(); |
|
1116 |
|
1117 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true); |
|
1118 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true); |
|
1119 } |
|
1120 |
|
1121 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { |
|
1122 address handler = _handler; |
|
1123 int insts_size = buffer->pure_insts_size(); |
|
1124 if (handler + insts_size > _handler_blob->code_end()) { |
|
1125 // get a new handler blob |
|
1126 handler = set_handler_blob(); |
|
1127 } |
|
1128 if (handler != NULL) { |
|
1129 memcpy(handler, buffer->insts_begin(), insts_size); |
|
1130 pd_set_handler(handler); |
|
1131 ICache::invalidate_range(handler, insts_size); |
|
1132 _handler = handler + insts_size; |
|
1133 } |
|
1134 return handler; |
|
1135 } |
|
1136 |
|
1137 void SignatureHandlerLibrary::add(methodHandle method) { |
|
1138 if (method->signature_handler() == NULL) { |
|
1139 // use slow signature handler if we can't do better |
|
1140 int handler_index = -1; |
|
1141 // check if we can use customized (fast) signature handler |
|
1142 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { |
|
1143 // use customized signature handler |
|
1144 MutexLocker mu(SignatureHandlerLibrary_lock); |
|
1145 // make sure data structure is initialized |
|
1146 initialize(); |
|
1147 // lookup method signature's fingerprint |
|
1148 uint64_t fingerprint = Fingerprinter(method).fingerprint(); |
|
1149 handler_index = _fingerprints->find(fingerprint); |
|
1150 // create handler if necessary |
|
1151 if (handler_index < 0) { |
|
1152 ResourceMark rm; |
|
1153 ptrdiff_t align_offset = (address) |
|
1154 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; |
|
1155 CodeBuffer buffer((address)(_buffer + align_offset), |
|
1156 SignatureHandlerLibrary::buffer_size - align_offset); |
|
1157 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); |
|
1158 // copy into code heap |
|
1159 address handler = set_handler(&buffer); |
|
1160 if (handler == NULL) { |
|
1161 // use slow signature handler |
|
1162 } else { |
|
1163 // debugging suppport |
|
1164 if (PrintSignatureHandlers) { |
|
1165 tty->cr(); |
|
1166 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", |
|
1167 _handlers->length(), |
|
1168 (method->is_static() ? "static" : "receiver"), |
|
1169 method->name_and_sig_as_C_string(), |
|
1170 fingerprint, |
|
1171 buffer.insts_size()); |
|
1172 Disassembler::decode(handler, handler + buffer.insts_size()); |
|
1173 #ifndef PRODUCT |
|
1174 tty->print_cr(" --- associated result handler ---"); |
|
1175 address rh_begin = Interpreter::result_handler(method()->result_type()); |
|
1176 address rh_end = rh_begin; |
|
1177 while (*(int*)rh_end != 0) { |
|
1178 rh_end += sizeof(int); |
|
1179 } |
|
1180 Disassembler::decode(rh_begin, rh_end); |
|
1181 #endif |
|
1182 } |
|
1183 // add handler to library |
|
1184 _fingerprints->append(fingerprint); |
|
1185 _handlers->append(handler); |
|
1186 // set handler index |
|
1187 assert(_fingerprints->length() == _handlers->length(), "sanity check"); |
|
1188 handler_index = _fingerprints->length() - 1; |
|
1189 } |
|
1190 } |
|
1191 // Set handler under SignatureHandlerLibrary_lock |
|
1192 if (handler_index < 0) { |
|
1193 // use generic signature handler |
|
1194 method->set_signature_handler(Interpreter::slow_signature_handler()); |
|
1195 } else { |
|
1196 // set handler |
|
1197 method->set_signature_handler(_handlers->at(handler_index)); |
|
1198 } |
|
1199 } else { |
|
1200 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
|
1201 // use generic signature handler |
|
1202 method->set_signature_handler(Interpreter::slow_signature_handler()); |
|
1203 } |
|
1204 } |
|
1205 #ifdef ASSERT |
|
1206 int handler_index = -1; |
|
1207 int fingerprint_index = -2; |
|
1208 { |
|
1209 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized |
|
1210 // in any way if accessed from multiple threads. To avoid races with another |
|
1211 // thread which may change the arrays in the above, mutex protected block, we |
|
1212 // have to protect this read access here with the same mutex as well! |
|
1213 MutexLocker mu(SignatureHandlerLibrary_lock); |
|
1214 if (_handlers != NULL) { |
|
1215 handler_index = _handlers->find(method->signature_handler()); |
|
1216 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint()); |
|
1217 } |
|
1218 } |
|
1219 assert(method->signature_handler() == Interpreter::slow_signature_handler() || |
|
1220 handler_index == fingerprint_index, "sanity check"); |
|
1221 #endif // ASSERT |
|
1222 } |
|
1223 |
|
1224 |
|
1225 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; |
|
1226 address SignatureHandlerLibrary::_handler = NULL; |
|
1227 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; |
|
1228 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; |
|
1229 address SignatureHandlerLibrary::_buffer = NULL; |
|
1230 |
|
1231 |
|
1232 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) |
|
1233 methodHandle m(thread, method); |
|
1234 assert(m->is_native(), "sanity check"); |
|
1235 // lookup native function entry point if it doesn't exist |
|
1236 bool in_base_library; |
|
1237 if (!m->has_native_function()) { |
|
1238 NativeLookup::lookup(m, in_base_library, CHECK); |
|
1239 } |
|
1240 // make sure signature handler is installed |
|
1241 SignatureHandlerLibrary::add(m); |
|
1242 // The interpreter entry point checks the signature handler first, |
|
1243 // before trying to fetch the native entry point and klass mirror. |
|
1244 // We must set the signature handler last, so that multiple processors |
|
1245 // preparing the same method will be sure to see non-null entry & mirror. |
|
1246 IRT_END |
|
1247 |
|
1248 #if defined(IA32) || defined(AMD64) || defined(ARM) |
|
1249 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) |
|
1250 if (src_address == dest_address) { |
|
1251 return; |
|
1252 } |
|
1253 ResetNoHandleMark rnm; // In a LEAF entry. |
|
1254 HandleMark hm; |
|
1255 ResourceMark rm; |
|
1256 frame fr = thread->last_frame(); |
|
1257 assert(fr.is_interpreted_frame(), ""); |
|
1258 jint bci = fr.interpreter_frame_bci(); |
|
1259 methodHandle mh(thread, fr.interpreter_frame_method()); |
|
1260 Bytecode_invoke invoke(mh, bci); |
|
1261 ArgumentSizeComputer asc(invoke.signature()); |
|
1262 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver |
|
1263 Copy::conjoint_jbytes(src_address, dest_address, |
|
1264 size_of_arguments * Interpreter::stackElementSize); |
|
1265 IRT_END |
|
1266 #endif |
|
1267 |
|
1268 #if INCLUDE_JVMTI |
|
1269 // This is a support of the JVMTI PopFrame interface. |
|
1270 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument |
|
1271 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. |
|
1272 // The dmh argument is a reference to a DirectMethoHandle that has a member name field. |
|
1273 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address dmh, |
|
1274 Method* method, address bcp)) |
|
1275 Bytecodes::Code code = Bytecodes::code_at(method, bcp); |
|
1276 if (code != Bytecodes::_invokestatic) { |
|
1277 return; |
|
1278 } |
|
1279 ConstantPool* cpool = method->constants(); |
|
1280 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; |
|
1281 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); |
|
1282 Symbol* mname = cpool->name_ref_at(cp_index); |
|
1283 |
|
1284 if (MethodHandles::has_member_arg(cname, mname)) { |
|
1285 oop member_name = java_lang_invoke_DirectMethodHandle::member((oop)dmh); |
|
1286 thread->set_vm_result(member_name); |
|
1287 } |
|
1288 IRT_END |
|
1289 #endif // INCLUDE_JVMTI |