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1 /* |
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 #include "incls/_precompiled.incl" |
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26 #include "incls/_interpreterRuntime.cpp.incl" |
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27 |
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28 class UnlockFlagSaver { |
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29 private: |
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30 JavaThread* _thread; |
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31 bool _do_not_unlock; |
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32 public: |
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33 UnlockFlagSaver(JavaThread* t) { |
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34 _thread = t; |
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35 _do_not_unlock = t->do_not_unlock_if_synchronized(); |
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36 t->set_do_not_unlock_if_synchronized(false); |
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37 } |
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38 ~UnlockFlagSaver() { |
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39 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); |
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40 } |
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41 }; |
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42 |
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43 //------------------------------------------------------------------------------------------------------------------------ |
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44 // State accessors |
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45 |
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46 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { |
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47 last_frame(thread).interpreter_frame_set_bcp(bcp); |
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48 if (ProfileInterpreter) { |
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49 // ProfileTraps uses MDOs independently of ProfileInterpreter. |
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50 // That is why we must check both ProfileInterpreter and mdo != NULL. |
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51 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); |
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52 if (mdo != NULL) { |
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53 NEEDS_CLEANUP; |
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54 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); |
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55 } |
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56 } |
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57 } |
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58 |
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59 //------------------------------------------------------------------------------------------------------------------------ |
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60 // Constants |
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61 |
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62 |
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63 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) |
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64 // access constant pool |
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65 constantPoolOop pool = method(thread)->constants(); |
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66 int index = wide ? two_byte_index(thread) : one_byte_index(thread); |
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67 constantTag tag = pool->tag_at(index); |
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68 |
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69 if (tag.is_unresolved_klass() || tag.is_klass()) { |
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70 klassOop klass = pool->klass_at(index, CHECK); |
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71 oop java_class = klass->klass_part()->java_mirror(); |
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72 thread->set_vm_result(java_class); |
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73 } else { |
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74 #ifdef ASSERT |
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75 // If we entered this runtime routine, we believed the tag contained |
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76 // an unresolved string, an unresolved class or a resolved class. |
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77 // However, another thread could have resolved the unresolved string |
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78 // or class by the time we go there. |
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79 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); |
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80 #endif |
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81 oop s_oop = pool->string_at(index, CHECK); |
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82 thread->set_vm_result(s_oop); |
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83 } |
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84 IRT_END |
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85 |
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86 |
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87 //------------------------------------------------------------------------------------------------------------------------ |
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88 // Allocation |
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89 |
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90 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) |
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91 klassOop k_oop = pool->klass_at(index, CHECK); |
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92 instanceKlassHandle klass (THREAD, k_oop); |
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93 |
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94 // Make sure we are not instantiating an abstract klass |
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95 klass->check_valid_for_instantiation(true, CHECK); |
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96 |
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97 // Make sure klass is initialized |
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98 klass->initialize(CHECK); |
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99 |
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100 // At this point the class may not be fully initialized |
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101 // because of recursive initialization. If it is fully |
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102 // initialized & has_finalized is not set, we rewrite |
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103 // it into its fast version (Note: no locking is needed |
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104 // here since this is an atomic byte write and can be |
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105 // done more than once). |
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106 // |
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107 // Note: In case of classes with has_finalized we don't |
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108 // rewrite since that saves us an extra check in |
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109 // the fast version which then would call the |
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110 // slow version anyway (and do a call back into |
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111 // Java). |
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112 // If we have a breakpoint, then we don't rewrite |
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113 // because the _breakpoint bytecode would be lost. |
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114 oop obj = klass->allocate_instance(CHECK); |
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115 thread->set_vm_result(obj); |
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116 IRT_END |
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117 |
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118 |
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119 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) |
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120 oop obj = oopFactory::new_typeArray(type, size, CHECK); |
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121 thread->set_vm_result(obj); |
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122 IRT_END |
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123 |
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124 |
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125 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) |
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126 // Note: no oopHandle for pool & klass needed since they are not used |
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127 // anymore after new_objArray() and no GC can happen before. |
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128 // (This may have to change if this code changes!) |
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129 klassOop klass = pool->klass_at(index, CHECK); |
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130 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); |
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131 thread->set_vm_result(obj); |
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132 IRT_END |
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133 |
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134 |
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135 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) |
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136 // We may want to pass in more arguments - could make this slightly faster |
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137 constantPoolOop constants = method(thread)->constants(); |
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138 int i = two_byte_index(thread); |
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139 klassOop klass = constants->klass_at(i, CHECK); |
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140 int nof_dims = number_of_dimensions(thread); |
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141 assert(oop(klass)->is_klass(), "not a class"); |
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142 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); |
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143 |
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144 // We must create an array of jints to pass to multi_allocate. |
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145 ResourceMark rm(thread); |
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146 const int small_dims = 10; |
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147 jint dim_array[small_dims]; |
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148 jint *dims = &dim_array[0]; |
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149 if (nof_dims > small_dims) { |
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150 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); |
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151 } |
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152 for (int index = 0; index < nof_dims; index++) { |
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153 // offset from first_size_address is addressed as local[index] |
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154 int n = Interpreter::local_offset_in_bytes(index)/jintSize; |
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155 dims[index] = first_size_address[n]; |
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156 } |
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157 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); |
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158 thread->set_vm_result(obj); |
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159 IRT_END |
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160 |
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161 |
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162 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) |
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163 assert(obj->is_oop(), "must be a valid oop"); |
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164 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); |
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165 instanceKlass::register_finalizer(instanceOop(obj), CHECK); |
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166 IRT_END |
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167 |
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168 |
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169 // Quicken instance-of and check-cast bytecodes |
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170 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) |
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171 // Force resolving; quicken the bytecode |
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172 int which = two_byte_index(thread); |
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173 constantPoolOop cpool = method(thread)->constants(); |
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174 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded |
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175 // program we might have seen an unquick'd bytecode in the interpreter but have another |
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176 // thread quicken the bytecode before we get here. |
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177 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); |
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178 klassOop klass = cpool->klass_at(which, CHECK); |
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179 thread->set_vm_result(klass); |
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180 IRT_END |
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181 |
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182 |
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183 //------------------------------------------------------------------------------------------------------------------------ |
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184 // Exceptions |
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185 |
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186 // Assume the compiler is (or will be) interested in this event. |
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187 // If necessary, create an MDO to hold the information, and record it. |
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188 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { |
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189 assert(ProfileTraps, "call me only if profiling"); |
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190 methodHandle trap_method(thread, method(thread)); |
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191 if (trap_method.not_null()) { |
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192 methodDataHandle trap_mdo(thread, trap_method->method_data()); |
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193 if (trap_mdo.is_null()) { |
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194 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); |
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195 if (HAS_PENDING_EXCEPTION) { |
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196 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); |
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197 CLEAR_PENDING_EXCEPTION; |
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198 } |
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199 trap_mdo = methodDataHandle(thread, trap_method->method_data()); |
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200 // and fall through... |
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201 } |
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202 if (trap_mdo.not_null()) { |
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203 // Update per-method count of trap events. The interpreter |
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204 // is updating the MDO to simulate the effect of compiler traps. |
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205 int trap_bci = trap_method->bci_from(bcp(thread)); |
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206 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); |
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207 } |
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208 } |
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209 } |
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210 |
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211 static Handle get_preinitialized_exception(klassOop k, TRAPS) { |
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212 // get klass |
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213 instanceKlass* klass = instanceKlass::cast(k); |
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214 assert(klass->is_initialized(), |
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215 "this klass should have been initialized during VM initialization"); |
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216 // create instance - do not call constructor since we may have no |
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217 // (java) stack space left (should assert constructor is empty) |
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218 Handle exception; |
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219 oop exception_oop = klass->allocate_instance(CHECK_(exception)); |
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220 exception = Handle(THREAD, exception_oop); |
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221 if (StackTraceInThrowable) { |
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222 java_lang_Throwable::fill_in_stack_trace(exception); |
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223 } |
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224 return exception; |
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225 } |
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226 |
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227 // Special handling for stack overflow: since we don't have any (java) stack |
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228 // space left we use the pre-allocated & pre-initialized StackOverflowError |
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229 // klass to create an stack overflow error instance. We do not call its |
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230 // constructor for the same reason (it is empty, anyway). |
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231 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) |
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232 Handle exception = get_preinitialized_exception( |
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233 SystemDictionary::StackOverflowError_klass(), |
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234 CHECK); |
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235 THROW_HANDLE(exception); |
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236 IRT_END |
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237 |
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238 |
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239 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) |
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240 // lookup exception klass |
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241 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); |
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242 if (ProfileTraps) { |
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243 if (s == vmSymbols::java_lang_ArithmeticException()) { |
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244 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); |
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245 } else if (s == vmSymbols::java_lang_NullPointerException()) { |
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246 note_trap(thread, Deoptimization::Reason_null_check, CHECK); |
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247 } |
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248 } |
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249 // create exception |
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250 Handle exception = Exceptions::new_exception(thread, s(), message); |
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251 thread->set_vm_result(exception()); |
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252 IRT_END |
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253 |
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254 |
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255 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) |
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256 ResourceMark rm(thread); |
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257 const char* klass_name = Klass::cast(obj->klass())->external_name(); |
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258 // lookup exception klass |
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259 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); |
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260 if (ProfileTraps) { |
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261 note_trap(thread, Deoptimization::Reason_class_check, CHECK); |
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262 } |
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263 // create exception, with klass name as detail message |
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264 Handle exception = Exceptions::new_exception(thread, s(), klass_name); |
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265 thread->set_vm_result(exception()); |
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266 IRT_END |
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267 |
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268 |
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269 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) |
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270 char message[jintAsStringSize]; |
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271 // lookup exception klass |
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272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); |
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273 if (ProfileTraps) { |
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274 note_trap(thread, Deoptimization::Reason_range_check, CHECK); |
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275 } |
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276 // create exception |
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277 sprintf(message, "%d", index); |
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278 THROW_MSG(s(), message); |
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279 IRT_END |
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280 |
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281 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( |
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282 JavaThread* thread, oopDesc* obj)) |
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283 |
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284 ResourceMark rm(thread); |
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285 char* message = SharedRuntime::generate_class_cast_message( |
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286 thread, Klass::cast(obj->klass())->external_name()); |
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287 |
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288 if (ProfileTraps) { |
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289 note_trap(thread, Deoptimization::Reason_class_check, CHECK); |
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290 } |
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291 |
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292 // create exception |
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293 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); |
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294 IRT_END |
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295 |
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296 |
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297 // exception_handler_for_exception(...) returns the continuation address, |
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298 // the exception oop (via TLS) and sets the bci/bcp for the continuation. |
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299 // The exception oop is returned to make sure it is preserved over GC (it |
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300 // is only on the stack if the exception was thrown explicitly via athrow). |
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301 // During this operation, the expression stack contains the values for the |
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302 // bci where the exception happened. If the exception was propagated back |
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303 // from a call, the expression stack contains the values for the bci at the |
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304 // invoke w/o arguments (i.e., as if one were inside the call). |
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305 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) |
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306 |
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307 Handle h_exception(thread, exception); |
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308 methodHandle h_method (thread, method(thread)); |
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309 constantPoolHandle h_constants(thread, h_method->constants()); |
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310 typeArrayHandle h_extable (thread, h_method->exception_table()); |
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311 bool should_repeat; |
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312 int handler_bci; |
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313 int current_bci = bcp(thread) - h_method->code_base(); |
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314 |
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315 // Need to do this check first since when _do_not_unlock_if_synchronized |
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316 // is set, we don't want to trigger any classloading which may make calls |
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317 // into java, or surprisingly find a matching exception handler for bci 0 |
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318 // since at this moment the method hasn't been "officially" entered yet. |
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319 if (thread->do_not_unlock_if_synchronized()) { |
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320 ResourceMark rm; |
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321 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); |
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322 thread->set_vm_result(exception); |
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323 #ifdef CC_INTERP |
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324 return (address) -1; |
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325 #else |
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326 return Interpreter::remove_activation_entry(); |
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327 #endif |
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328 } |
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329 |
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330 do { |
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331 should_repeat = false; |
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332 |
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333 // assertions |
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334 #ifdef ASSERT |
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335 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); |
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336 assert(h_exception->is_oop(), "just checking"); |
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337 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError |
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338 if (!(h_exception->is_a(SystemDictionary::throwable_klass()))) { |
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339 if (ExitVMOnVerifyError) vm_exit(-1); |
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340 ShouldNotReachHere(); |
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341 } |
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342 #endif |
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343 |
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344 // tracing |
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345 if (TraceExceptions) { |
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346 ttyLocker ttyl; |
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347 ResourceMark rm(thread); |
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348 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); |
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349 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); |
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350 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); |
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351 } |
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352 // Don't go paging in something which won't be used. |
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353 // else if (h_extable->length() == 0) { |
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354 // // disabled for now - interpreter is not using shortcut yet |
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355 // // (shortcut is not to call runtime if we have no exception handlers) |
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356 // // warning("performance bug: should not call runtime if method has no exception handlers"); |
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357 // } |
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358 // for AbortVMOnException flag |
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359 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); |
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360 |
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361 // exception handler lookup |
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362 KlassHandle h_klass(THREAD, h_exception->klass()); |
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363 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); |
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364 if (HAS_PENDING_EXCEPTION) { |
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365 // We threw an exception while trying to find the exception handler. |
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366 // Transfer the new exception to the exception handle which will |
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367 // be set into thread local storage, and do another lookup for an |
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368 // exception handler for this exception, this time starting at the |
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369 // BCI of the exception handler which caused the exception to be |
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370 // thrown (bug 4307310). |
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371 h_exception = Handle(THREAD, PENDING_EXCEPTION); |
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372 CLEAR_PENDING_EXCEPTION; |
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373 if (handler_bci >= 0) { |
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374 current_bci = handler_bci; |
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375 should_repeat = true; |
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376 } |
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377 } |
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378 } while (should_repeat == true); |
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379 |
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380 // notify JVMTI of an exception throw; JVMTI will detect if this is a first |
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381 // time throw or a stack unwinding throw and accordingly notify the debugger |
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382 if (JvmtiExport::can_post_exceptions()) { |
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383 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
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384 } |
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385 |
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386 #ifdef CC_INTERP |
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387 address continuation = (address)(intptr_t) handler_bci; |
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388 #else |
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389 address continuation = NULL; |
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390 #endif |
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391 address handler_pc = NULL; |
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392 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { |
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393 // Forward exception to callee (leaving bci/bcp untouched) because (a) no |
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394 // handler in this method, or (b) after a stack overflow there is not yet |
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395 // enough stack space available to reprotect the stack. |
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396 #ifndef CC_INTERP |
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397 continuation = Interpreter::remove_activation_entry(); |
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398 #endif |
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399 // Count this for compilation purposes |
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400 h_method->interpreter_throwout_increment(); |
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401 } else { |
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402 // handler in this method => change bci/bcp to handler bci/bcp and continue there |
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403 handler_pc = h_method->code_base() + handler_bci; |
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404 #ifndef CC_INTERP |
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405 set_bcp_and_mdp(handler_pc, thread); |
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406 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; |
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407 #endif |
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408 } |
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409 // notify debugger of an exception catch |
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410 // (this is good for exceptions caught in native methods as well) |
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411 if (JvmtiExport::can_post_exceptions()) { |
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412 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
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413 } |
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414 |
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415 thread->set_vm_result(h_exception()); |
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416 return continuation; |
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417 IRT_END |
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418 |
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419 |
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420 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) |
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421 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); |
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422 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) |
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423 IRT_END |
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424 |
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425 |
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426 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) |
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427 THROW(vmSymbols::java_lang_AbstractMethodError()); |
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428 IRT_END |
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429 |
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430 |
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431 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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432 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); |
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433 IRT_END |
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434 |
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435 |
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436 //------------------------------------------------------------------------------------------------------------------------ |
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437 // Fields |
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438 // |
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439 |
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440 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) |
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441 // resolve field |
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442 FieldAccessInfo info; |
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443 constantPoolHandle pool(thread, method(thread)->constants()); |
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444 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); |
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445 |
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446 { |
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447 JvmtiHideSingleStepping jhss(thread); |
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448 LinkResolver::resolve_field(info, pool, two_byte_index(thread), |
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449 bytecode, false, CHECK); |
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450 } // end JvmtiHideSingleStepping |
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451 |
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452 // check if link resolution caused cpCache to be updated |
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453 if (already_resolved(thread)) return; |
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454 |
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455 // compute auxiliary field attributes |
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456 TosState state = as_TosState(info.field_type()); |
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457 |
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458 // We need to delay resolving put instructions on final fields |
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459 // until we actually invoke one. This is required so we throw |
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460 // exceptions at the correct place. If we do not resolve completely |
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461 // in the current pass, leaving the put_code set to zero will |
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462 // cause the next put instruction to reresolve. |
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463 bool is_put = (bytecode == Bytecodes::_putfield || |
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464 bytecode == Bytecodes::_putstatic); |
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465 Bytecodes::Code put_code = (Bytecodes::Code)0; |
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466 |
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467 // We also need to delay resolving getstatic instructions until the |
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468 // class is intitialized. This is required so that access to the static |
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469 // field will call the initialization function every time until the class |
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470 // is completely initialized ala. in 2.17.5 in JVM Specification. |
|
471 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); |
|
472 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && |
|
473 !klass->is_initialized()); |
|
474 Bytecodes::Code get_code = (Bytecodes::Code)0; |
|
475 |
|
476 |
|
477 if (!uninitialized_static) { |
|
478 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); |
|
479 if (is_put || !info.access_flags().is_final()) { |
|
480 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); |
|
481 } |
|
482 } |
|
483 |
|
484 cache_entry(thread)->set_field( |
|
485 get_code, |
|
486 put_code, |
|
487 info.klass(), |
|
488 info.field_index(), |
|
489 info.field_offset(), |
|
490 state, |
|
491 info.access_flags().is_final(), |
|
492 info.access_flags().is_volatile() |
|
493 ); |
|
494 IRT_END |
|
495 |
|
496 |
|
497 //------------------------------------------------------------------------------------------------------------------------ |
|
498 // Synchronization |
|
499 // |
|
500 // The interpreter's synchronization code is factored out so that it can |
|
501 // be shared by method invocation and synchronized blocks. |
|
502 //%note synchronization_3 |
|
503 |
|
504 static void trace_locking(Handle& h_locking_obj, bool is_locking) { |
|
505 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); |
|
506 } |
|
507 |
|
508 |
|
509 //%note monitor_1 |
|
510 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) |
|
511 #ifdef ASSERT |
|
512 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
513 #endif |
|
514 if (PrintBiasedLockingStatistics) { |
|
515 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); |
|
516 } |
|
517 Handle h_obj(thread, elem->obj()); |
|
518 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), |
|
519 "must be NULL or an object"); |
|
520 if (UseBiasedLocking) { |
|
521 // Retry fast entry if bias is revoked to avoid unnecessary inflation |
|
522 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); |
|
523 } else { |
|
524 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); |
|
525 } |
|
526 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), |
|
527 "must be NULL or an object"); |
|
528 #ifdef ASSERT |
|
529 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
530 #endif |
|
531 IRT_END |
|
532 |
|
533 |
|
534 //%note monitor_1 |
|
535 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) |
|
536 #ifdef ASSERT |
|
537 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
538 #endif |
|
539 Handle h_obj(thread, elem->obj()); |
|
540 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), |
|
541 "must be NULL or an object"); |
|
542 if (elem == NULL || h_obj()->is_unlocked()) { |
|
543 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); |
|
544 } |
|
545 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); |
|
546 // Free entry. This must be done here, since a pending exception might be installed on |
|
547 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. |
|
548 elem->set_obj(NULL); |
|
549 #ifdef ASSERT |
|
550 thread->last_frame().interpreter_frame_verify_monitor(elem); |
|
551 #endif |
|
552 IRT_END |
|
553 |
|
554 |
|
555 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) |
|
556 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); |
|
557 IRT_END |
|
558 |
|
559 |
|
560 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) |
|
561 // Returns an illegal exception to install into the current thread. The |
|
562 // pending_exception flag is cleared so normal exception handling does not |
|
563 // trigger. Any current installed exception will be overwritten. This |
|
564 // method will be called during an exception unwind. |
|
565 |
|
566 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); |
|
567 Handle exception(thread, thread->vm_result()); |
|
568 assert(exception() != NULL, "vm result should be set"); |
|
569 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) |
|
570 if (!exception->is_a(SystemDictionary::threaddeath_klass())) { |
|
571 exception = get_preinitialized_exception( |
|
572 SystemDictionary::IllegalMonitorStateException_klass(), |
|
573 CATCH); |
|
574 } |
|
575 thread->set_vm_result(exception()); |
|
576 IRT_END |
|
577 |
|
578 |
|
579 //------------------------------------------------------------------------------------------------------------------------ |
|
580 // Invokes |
|
581 |
|
582 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) |
|
583 return method->orig_bytecode_at(method->bci_from(bcp)); |
|
584 IRT_END |
|
585 |
|
586 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) |
|
587 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); |
|
588 IRT_END |
|
589 |
|
590 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) |
|
591 JvmtiExport::post_raw_breakpoint(thread, method, bcp); |
|
592 IRT_END |
|
593 |
|
594 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) |
|
595 // extract receiver from the outgoing argument list if necessary |
|
596 Handle receiver(thread, NULL); |
|
597 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { |
|
598 ResourceMark rm(thread); |
|
599 methodHandle m (thread, method(thread)); |
|
600 int bci = m->bci_from(bcp(thread)); |
|
601 Bytecode_invoke* call = Bytecode_invoke_at(m, bci); |
|
602 symbolHandle signature (thread, call->signature()); |
|
603 receiver = Handle(thread, |
|
604 thread->last_frame().interpreter_callee_receiver(signature)); |
|
605 assert(Universe::heap()->is_in_reserved_or_null(receiver()), |
|
606 "sanity check"); |
|
607 assert(receiver.is_null() || |
|
608 Universe::heap()->is_in_reserved(receiver->klass()), |
|
609 "sanity check"); |
|
610 } |
|
611 |
|
612 // resolve method |
|
613 CallInfo info; |
|
614 constantPoolHandle pool(thread, method(thread)->constants()); |
|
615 |
|
616 { |
|
617 JvmtiHideSingleStepping jhss(thread); |
|
618 LinkResolver::resolve_invoke(info, receiver, pool, |
|
619 two_byte_index(thread), bytecode, CHECK); |
|
620 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
|
621 int retry_count = 0; |
|
622 while (info.resolved_method()->is_old()) { |
|
623 // It is very unlikely that method is redefined more than 100 times |
|
624 // in the middle of resolve. If it is looping here more than 100 times |
|
625 // means then there could be a bug here. |
|
626 guarantee((retry_count++ < 100), |
|
627 "Could not resolve to latest version of redefined method"); |
|
628 // method is redefined in the middle of resolve so re-try. |
|
629 LinkResolver::resolve_invoke(info, receiver, pool, |
|
630 two_byte_index(thread), bytecode, CHECK); |
|
631 } |
|
632 } |
|
633 } // end JvmtiHideSingleStepping |
|
634 |
|
635 // check if link resolution caused cpCache to be updated |
|
636 if (already_resolved(thread)) return; |
|
637 |
|
638 if (bytecode == Bytecodes::_invokeinterface) { |
|
639 |
|
640 if (TraceItables && Verbose) { |
|
641 ResourceMark rm(thread); |
|
642 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); |
|
643 } |
|
644 if (info.resolved_method()->method_holder() == |
|
645 SystemDictionary::object_klass()) { |
|
646 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
|
647 // (see also cpCacheOop.cpp for details) |
|
648 methodHandle rm = info.resolved_method(); |
|
649 assert(rm->is_final() || info.has_vtable_index(), |
|
650 "should have been set already"); |
|
651 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); |
|
652 } else { |
|
653 // Setup itable entry |
|
654 int index = klassItable::compute_itable_index(info.resolved_method()()); |
|
655 cache_entry(thread)->set_interface_call(info.resolved_method(), index); |
|
656 } |
|
657 } else { |
|
658 cache_entry(thread)->set_method( |
|
659 bytecode, |
|
660 info.resolved_method(), |
|
661 info.vtable_index()); |
|
662 } |
|
663 IRT_END |
|
664 |
|
665 |
|
666 //------------------------------------------------------------------------------------------------------------------------ |
|
667 // Miscellaneous |
|
668 |
|
669 |
|
670 #ifndef PRODUCT |
|
671 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { |
|
672 if (TraceInvocationCounterOverflow) { |
|
673 InvocationCounter* ic = m->invocation_counter(); |
|
674 InvocationCounter* bc = m->backedge_counter(); |
|
675 ResourceMark rm; |
|
676 const char* msg = |
|
677 branch_bcp == NULL |
|
678 ? "comp-policy cntr ovfl @ %d in entry of " |
|
679 : "comp-policy cntr ovfl @ %d in loop of "; |
|
680 tty->print(msg, bci); |
|
681 m->print_value(); |
|
682 tty->cr(); |
|
683 ic->print(); |
|
684 bc->print(); |
|
685 if (ProfileInterpreter) { |
|
686 if (branch_bcp != NULL) { |
|
687 methodDataOop mdo = m->method_data(); |
|
688 if (mdo != NULL) { |
|
689 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); |
|
690 tty->print_cr("back branch count = %d", count); |
|
691 } |
|
692 } |
|
693 } |
|
694 } |
|
695 } |
|
696 |
|
697 static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { |
|
698 if (TraceOnStackReplacement) { |
|
699 ResourceMark rm; |
|
700 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); |
|
701 method->print_short_name(tty); |
|
702 tty->print_cr(" at bci %d", bci); |
|
703 } |
|
704 } |
|
705 #endif // !PRODUCT |
|
706 |
|
707 IRT_ENTRY(nmethod*, |
|
708 InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp)) |
|
709 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
|
710 // flag, in case this method triggers classloading which will call into Java. |
|
711 UnlockFlagSaver fs(thread); |
|
712 |
|
713 frame fr = thread->last_frame(); |
|
714 assert(fr.is_interpreted_frame(), "must come from interpreter"); |
|
715 methodHandle method(thread, fr.interpreter_frame_method()); |
|
716 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; |
|
717 const int bci = method->bci_from(fr.interpreter_frame_bcp()); |
|
718 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) |
|
719 |
|
720 if (JvmtiExport::can_post_interpreter_events()) { |
|
721 if (thread->is_interp_only_mode()) { |
|
722 // If certain JVMTI events (e.g. frame pop event) are requested then the |
|
723 // thread is forced to remain in interpreted code. This is |
|
724 // implemented partly by a check in the run_compiled_code |
|
725 // section of the interpreter whether we should skip running |
|
726 // compiled code, and partly by skipping OSR compiles for |
|
727 // interpreted-only threads. |
|
728 if (branch_bcp != NULL) { |
|
729 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); |
|
730 return NULL; |
|
731 } |
|
732 } |
|
733 } |
|
734 |
|
735 if (branch_bcp == NULL) { |
|
736 // when code cache is full, compilation gets switched off, UseCompiler |
|
737 // is set to false |
|
738 if (!method->has_compiled_code() && UseCompiler) { |
|
739 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); |
|
740 } else { |
|
741 // Force counter overflow on method entry, even if no compilation |
|
742 // happened. (The method_invocation_event call does this also.) |
|
743 CompilationPolicy::policy()->reset_counter_for_invocation_event(method); |
|
744 } |
|
745 // compilation at an invocation overflow no longer goes and retries test for |
|
746 // compiled method. We always run the loser of the race as interpreted. |
|
747 // so return NULL |
|
748 return NULL; |
|
749 } else { |
|
750 // counter overflow in a loop => try to do on-stack-replacement |
|
751 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); |
|
752 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) |
|
753 // when code cache is full, we should not compile any more... |
|
754 if (osr_nm == NULL && UseCompiler) { |
|
755 const int branch_bci = method->bci_from(branch_bcp); |
|
756 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); |
|
757 osr_nm = method->lookup_osr_nmethod_for(bci); |
|
758 } |
|
759 if (osr_nm == NULL) { |
|
760 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); |
|
761 return NULL; |
|
762 } else { |
|
763 // We may need to do on-stack replacement which requires that no |
|
764 // monitors in the activation are biased because their |
|
765 // BasicObjectLocks will need to migrate during OSR. Force |
|
766 // unbiasing of all monitors in the activation now (even though |
|
767 // the OSR nmethod might be invalidated) because we don't have a |
|
768 // safepoint opportunity later once the migration begins. |
|
769 if (UseBiasedLocking) { |
|
770 ResourceMark rm; |
|
771 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); |
|
772 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); |
|
773 kptr < fr.interpreter_frame_monitor_begin(); |
|
774 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { |
|
775 if( kptr->obj() != NULL ) { |
|
776 objects_to_revoke->append(Handle(THREAD, kptr->obj())); |
|
777 } |
|
778 } |
|
779 BiasedLocking::revoke(objects_to_revoke); |
|
780 } |
|
781 |
|
782 return osr_nm; |
|
783 } |
|
784 } |
|
785 IRT_END |
|
786 |
|
787 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) |
|
788 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
789 int bci = method->bci_from(cur_bcp); |
|
790 methodDataOop mdo = method->method_data(); |
|
791 if (mdo == NULL) return 0; |
|
792 return mdo->bci_to_di(bci); |
|
793 IRT_END |
|
794 |
|
795 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) |
|
796 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
|
797 // flag, in case this method triggers classloading which will call into Java. |
|
798 UnlockFlagSaver fs(thread); |
|
799 |
|
800 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
801 frame fr = thread->last_frame(); |
|
802 assert(fr.is_interpreted_frame(), "must come from interpreter"); |
|
803 methodHandle method(thread, fr.interpreter_frame_method()); |
|
804 int bci = method->bci_from(cur_bcp); |
|
805 methodOopDesc::build_interpreter_method_data(method, THREAD); |
|
806 if (HAS_PENDING_EXCEPTION) { |
|
807 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); |
|
808 CLEAR_PENDING_EXCEPTION; |
|
809 // and fall through... |
|
810 } |
|
811 methodDataOop mdo = method->method_data(); |
|
812 if (mdo == NULL) return 0; |
|
813 return mdo->bci_to_di(bci); |
|
814 IRT_END |
|
815 |
|
816 |
|
817 #ifdef ASSERT |
|
818 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) |
|
819 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
820 |
|
821 methodDataOop mdo = method->method_data(); |
|
822 assert(mdo != NULL, "must not be null"); |
|
823 |
|
824 int bci = method->bci_from(bcp); |
|
825 |
|
826 address mdp2 = mdo->bci_to_dp(bci); |
|
827 if (mdp != mdp2) { |
|
828 ResourceMark rm; |
|
829 ResetNoHandleMark rnm; // In a LEAF entry. |
|
830 HandleMark hm; |
|
831 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); |
|
832 int current_di = mdo->dp_to_di(mdp); |
|
833 int expected_di = mdo->dp_to_di(mdp2); |
|
834 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); |
|
835 int expected_approx_bci = mdo->data_at(expected_di)->bci(); |
|
836 int approx_bci = -1; |
|
837 if (current_di >= 0) { |
|
838 approx_bci = mdo->data_at(current_di)->bci(); |
|
839 } |
|
840 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); |
|
841 mdo->print_on(tty); |
|
842 method->print_codes(); |
|
843 } |
|
844 assert(mdp == mdp2, "wrong mdp"); |
|
845 IRT_END |
|
846 #endif // ASSERT |
|
847 |
|
848 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) |
|
849 assert(ProfileInterpreter, "must be profiling interpreter"); |
|
850 ResourceMark rm(thread); |
|
851 HandleMark hm(thread); |
|
852 frame fr = thread->last_frame(); |
|
853 assert(fr.is_interpreted_frame(), "must come from interpreter"); |
|
854 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); |
|
855 |
|
856 // Grab a lock to ensure atomic access to setting the return bci and |
|
857 // the displacement. This can block and GC, invalidating all naked oops. |
|
858 MutexLocker ml(RetData_lock); |
|
859 |
|
860 // ProfileData is essentially a wrapper around a derived oop, so we |
|
861 // need to take the lock before making any ProfileData structures. |
|
862 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); |
|
863 RetData* rdata = data->as_RetData(); |
|
864 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); |
|
865 fr.interpreter_frame_set_mdp(new_mdp); |
|
866 IRT_END |
|
867 |
|
868 |
|
869 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) |
|
870 // We used to need an explict preserve_arguments here for invoke bytecodes. However, |
|
871 // stack traversal automatically takes care of preserving arguments for invoke, so |
|
872 // this is no longer needed. |
|
873 |
|
874 // IRT_END does an implicit safepoint check, hence we are guaranteed to block |
|
875 // if this is called during a safepoint |
|
876 |
|
877 if (JvmtiExport::should_post_single_step()) { |
|
878 // We are called during regular safepoints and when the VM is |
|
879 // single stepping. If any thread is marked for single stepping, |
|
880 // then we may have JVMTI work to do. |
|
881 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); |
|
882 } |
|
883 IRT_END |
|
884 |
|
885 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, |
|
886 ConstantPoolCacheEntry *cp_entry)) |
|
887 |
|
888 // check the access_flags for the field in the klass |
|
889 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); |
|
890 typeArrayOop fields = ik->fields(); |
|
891 int index = cp_entry->field_index(); |
|
892 assert(index < fields->length(), "holders field index is out of range"); |
|
893 // bail out if field accesses are not watched |
|
894 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; |
|
895 |
|
896 switch(cp_entry->flag_state()) { |
|
897 case btos: // fall through |
|
898 case ctos: // fall through |
|
899 case stos: // fall through |
|
900 case itos: // fall through |
|
901 case ftos: // fall through |
|
902 case ltos: // fall through |
|
903 case dtos: // fall through |
|
904 case atos: break; |
|
905 default: ShouldNotReachHere(); return; |
|
906 } |
|
907 bool is_static = (obj == NULL); |
|
908 HandleMark hm(thread); |
|
909 |
|
910 Handle h_obj; |
|
911 if (!is_static) { |
|
912 // non-static field accessors have an object, but we need a handle |
|
913 h_obj = Handle(thread, obj); |
|
914 } |
|
915 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); |
|
916 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); |
|
917 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); |
|
918 IRT_END |
|
919 |
|
920 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, |
|
921 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) |
|
922 |
|
923 klassOop k = (klassOop)cp_entry->f1(); |
|
924 |
|
925 // check the access_flags for the field in the klass |
|
926 instanceKlass* ik = instanceKlass::cast(k); |
|
927 typeArrayOop fields = ik->fields(); |
|
928 int index = cp_entry->field_index(); |
|
929 assert(index < fields->length(), "holders field index is out of range"); |
|
930 // bail out if field modifications are not watched |
|
931 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; |
|
932 |
|
933 char sig_type = '\0'; |
|
934 |
|
935 switch(cp_entry->flag_state()) { |
|
936 case btos: sig_type = 'Z'; break; |
|
937 case ctos: sig_type = 'C'; break; |
|
938 case stos: sig_type = 'S'; break; |
|
939 case itos: sig_type = 'I'; break; |
|
940 case ftos: sig_type = 'F'; break; |
|
941 case atos: sig_type = 'L'; break; |
|
942 case ltos: sig_type = 'J'; break; |
|
943 case dtos: sig_type = 'D'; break; |
|
944 default: ShouldNotReachHere(); return; |
|
945 } |
|
946 bool is_static = (obj == NULL); |
|
947 |
|
948 HandleMark hm(thread); |
|
949 instanceKlassHandle h_klass(thread, k); |
|
950 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); |
|
951 jvalue fvalue; |
|
952 #ifdef _LP64 |
|
953 fvalue = *value; |
|
954 #else |
|
955 // Long/double values are stored unaligned and also noncontiguously with |
|
956 // tagged stacks. We can't just do a simple assignment even in the non- |
|
957 // J/D cases because a C++ compiler is allowed to assume that a jvalue is |
|
958 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. |
|
959 // We assume that the two halves of longs/doubles are stored in interpreter |
|
960 // stack slots in platform-endian order. |
|
961 jlong_accessor u; |
|
962 jint* newval = (jint*)value; |
|
963 u.words[0] = newval[0]; |
|
964 u.words[1] = newval[Interpreter::stackElementWords()]; // skip if tag |
|
965 fvalue.j = u.long_value; |
|
966 #endif // _LP64 |
|
967 |
|
968 Handle h_obj; |
|
969 if (!is_static) { |
|
970 // non-static field accessors have an object, but we need a handle |
|
971 h_obj = Handle(thread, obj); |
|
972 } |
|
973 |
|
974 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, |
|
975 fid, sig_type, &fvalue); |
|
976 IRT_END |
|
977 |
|
978 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) |
|
979 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); |
|
980 IRT_END |
|
981 |
|
982 |
|
983 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) |
|
984 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); |
|
985 IRT_END |
|
986 |
|
987 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) |
|
988 { |
|
989 return (Interpreter::contains(pc) ? 1 : 0); |
|
990 } |
|
991 IRT_END |
|
992 |
|
993 |
|
994 // Implementation of SignatureHandlerLibrary |
|
995 |
|
996 address SignatureHandlerLibrary::set_handler_blob() { |
|
997 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); |
|
998 if (handler_blob == NULL) { |
|
999 return NULL; |
|
1000 } |
|
1001 address handler = handler_blob->instructions_begin(); |
|
1002 _handler_blob = handler_blob; |
|
1003 _handler = handler; |
|
1004 return handler; |
|
1005 } |
|
1006 |
|
1007 void SignatureHandlerLibrary::initialize() { |
|
1008 if (_fingerprints != NULL) { |
|
1009 return; |
|
1010 } |
|
1011 if (set_handler_blob() == NULL) { |
|
1012 vm_exit_out_of_memory(blob_size, "native signature handlers"); |
|
1013 } |
|
1014 |
|
1015 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", |
|
1016 SignatureHandlerLibrary::buffer_size); |
|
1017 _buffer = bb->instructions_begin(); |
|
1018 |
|
1019 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); |
|
1020 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); |
|
1021 } |
|
1022 |
|
1023 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { |
|
1024 address handler = _handler; |
|
1025 int code_size = buffer->pure_code_size(); |
|
1026 if (handler + code_size > _handler_blob->instructions_end()) { |
|
1027 // get a new handler blob |
|
1028 handler = set_handler_blob(); |
|
1029 } |
|
1030 if (handler != NULL) { |
|
1031 memcpy(handler, buffer->code_begin(), code_size); |
|
1032 pd_set_handler(handler); |
|
1033 ICache::invalidate_range(handler, code_size); |
|
1034 _handler = handler + code_size; |
|
1035 } |
|
1036 return handler; |
|
1037 } |
|
1038 |
|
1039 void SignatureHandlerLibrary::add(methodHandle method) { |
|
1040 if (method->signature_handler() == NULL) { |
|
1041 // use slow signature handler if we can't do better |
|
1042 int handler_index = -1; |
|
1043 // check if we can use customized (fast) signature handler |
|
1044 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { |
|
1045 // use customized signature handler |
|
1046 MutexLocker mu(SignatureHandlerLibrary_lock); |
|
1047 // make sure data structure is initialized |
|
1048 initialize(); |
|
1049 // lookup method signature's fingerprint |
|
1050 uint64_t fingerprint = Fingerprinter(method).fingerprint(); |
|
1051 handler_index = _fingerprints->find(fingerprint); |
|
1052 // create handler if necessary |
|
1053 if (handler_index < 0) { |
|
1054 ResourceMark rm; |
|
1055 ptrdiff_t align_offset = (address) |
|
1056 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; |
|
1057 CodeBuffer buffer((address)(_buffer + align_offset), |
|
1058 SignatureHandlerLibrary::buffer_size - align_offset); |
|
1059 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); |
|
1060 // copy into code heap |
|
1061 address handler = set_handler(&buffer); |
|
1062 if (handler == NULL) { |
|
1063 // use slow signature handler |
|
1064 } else { |
|
1065 // debugging suppport |
|
1066 if (PrintSignatureHandlers) { |
|
1067 tty->cr(); |
|
1068 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", |
|
1069 _handlers->length(), |
|
1070 (method->is_static() ? "static" : "receiver"), |
|
1071 method->name_and_sig_as_C_string(), |
|
1072 fingerprint, |
|
1073 buffer.code_size()); |
|
1074 Disassembler::decode(handler, handler + buffer.code_size()); |
|
1075 #ifndef PRODUCT |
|
1076 tty->print_cr(" --- associated result handler ---"); |
|
1077 address rh_begin = Interpreter::result_handler(method()->result_type()); |
|
1078 address rh_end = rh_begin; |
|
1079 while (*(int*)rh_end != 0) { |
|
1080 rh_end += sizeof(int); |
|
1081 } |
|
1082 Disassembler::decode(rh_begin, rh_end); |
|
1083 #endif |
|
1084 } |
|
1085 // add handler to library |
|
1086 _fingerprints->append(fingerprint); |
|
1087 _handlers->append(handler); |
|
1088 // set handler index |
|
1089 assert(_fingerprints->length() == _handlers->length(), "sanity check"); |
|
1090 handler_index = _fingerprints->length() - 1; |
|
1091 } |
|
1092 } |
|
1093 } else { |
|
1094 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
|
1095 } |
|
1096 if (handler_index < 0) { |
|
1097 // use generic signature handler |
|
1098 method->set_signature_handler(Interpreter::slow_signature_handler()); |
|
1099 } else { |
|
1100 // set handler |
|
1101 method->set_signature_handler(_handlers->at(handler_index)); |
|
1102 } |
|
1103 } |
|
1104 assert(method->signature_handler() == Interpreter::slow_signature_handler() || |
|
1105 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), |
|
1106 "sanity check"); |
|
1107 } |
|
1108 |
|
1109 |
|
1110 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; |
|
1111 address SignatureHandlerLibrary::_handler = NULL; |
|
1112 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; |
|
1113 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; |
|
1114 address SignatureHandlerLibrary::_buffer = NULL; |
|
1115 |
|
1116 |
|
1117 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) |
|
1118 methodHandle m(thread, method); |
|
1119 assert(m->is_native(), "sanity check"); |
|
1120 // lookup native function entry point if it doesn't exist |
|
1121 bool in_base_library; |
|
1122 if (!m->has_native_function()) { |
|
1123 NativeLookup::lookup(m, in_base_library, CHECK); |
|
1124 } |
|
1125 // make sure signature handler is installed |
|
1126 SignatureHandlerLibrary::add(m); |
|
1127 // The interpreter entry point checks the signature handler first, |
|
1128 // before trying to fetch the native entry point and klass mirror. |
|
1129 // We must set the signature handler last, so that multiple processors |
|
1130 // preparing the same method will be sure to see non-null entry & mirror. |
|
1131 IRT_END |
|
1132 |
|
1133 #if defined(IA32) || defined(AMD64) |
|
1134 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) |
|
1135 if (src_address == dest_address) { |
|
1136 return; |
|
1137 } |
|
1138 ResetNoHandleMark rnm; // In a LEAF entry. |
|
1139 HandleMark hm; |
|
1140 ResourceMark rm; |
|
1141 frame fr = thread->last_frame(); |
|
1142 assert(fr.is_interpreted_frame(), ""); |
|
1143 jint bci = fr.interpreter_frame_bci(); |
|
1144 methodHandle mh(thread, fr.interpreter_frame_method()); |
|
1145 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); |
|
1146 ArgumentSizeComputer asc(invoke->signature()); |
|
1147 int size_of_arguments = (asc.size() + (invoke->is_invokestatic() ? 0 : 1)); // receiver |
|
1148 Copy::conjoint_bytes(src_address, dest_address, |
|
1149 size_of_arguments * Interpreter::stackElementSize()); |
|
1150 IRT_END |
|
1151 #endif |