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annotate src/share/vm/jvmci/jvmciEnv.hpp @ 21731:df9d2375512a

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author Tom Rodriguez <tom.rodriguez@oracle.com>
date Wed, 03 Jun 2015 20:24:05 -0700
parents be896a1983c0
children
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1 /*
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_JVMCI_JVMCIENV_HPP
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26 #define SHARE_VM_JVMCI_JVMCIENV_HPP
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27
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28 #include "classfile/systemDictionary.hpp"
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29 #include "code/debugInfoRec.hpp"
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30 #include "code/dependencies.hpp"
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31 #include "code/exceptionHandlerTable.hpp"
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32 #include "compiler/oopMap.hpp"
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33 #include "runtime/thread.hpp"
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34
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35 class CompileTask;
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36
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37 // Bring the JVMCI compiler thread into the VM state.
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38 #define JVMCI_VM_ENTRY_MARK \
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39 JavaThread* thread = JavaThread::current(); \
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40 ThreadInVMfromNative __tiv(thread); \
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41 ResetNoHandleMark rnhm; \
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42 HandleMarkCleaner __hm(thread); \
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43 Thread* THREAD = thread; \
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44 debug_only(VMNativeEntryWrapper __vew;)
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45
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46 #define JVMCI_EXCEPTION_CONTEXT \
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47 JavaThread* thread=JavaThread::current(); \
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48 Thread* THREAD = thread;
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49
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50 //
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51 // This class is the top level broker for requests from the compiler
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52 // to the VM.
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53 class JVMCIEnv : StackObj {
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54 CI_PACKAGE_ACCESS_TO
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55
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56 friend class CompileBroker;
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57 friend class Dependencies; // for get_object, during logging
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58
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59 public:
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60
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61 enum CodeInstallResult {
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62 ok,
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63 dependencies_failed,
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64 dependencies_invalid,
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65 cache_full,
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66 code_too_large
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67 };
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68
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69 // Look up a klass by name from a particular class loader (the accessor's).
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70 // If require_local, result must be defined in that class loader, or NULL.
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71 // If !require_local, a result from remote class loader may be reported,
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72 // if sufficient class loader constraints exist such that initiating
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73 // a class loading request from the given loader is bound to return
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74 // the class defined in the remote loader (or throw an error).
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75 //
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76 // Return an unloaded klass if !require_local and no class at all is found.
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77 //
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78 // The CI treats a klass as loaded if it is consistently defined in
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79 // another loader, even if it hasn't yet been loaded in all loaders
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80 // that could potentially see it via delegation.
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81 static KlassHandle get_klass_by_name(KlassHandle& accessing_klass,
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82 Symbol* klass_name,
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83 bool require_local);
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84
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85 // Constant pool access.
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86 static KlassHandle get_klass_by_index(constantPoolHandle& cpool,
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87 int klass_index,
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88 bool& is_accessible,
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89 KlassHandle& loading_klass);
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90 static void get_field_by_index(instanceKlassHandle& loading_klass, fieldDescriptor& fd,
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91 int field_index);
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92 static methodHandle get_method_by_index(constantPoolHandle& cpool,
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93 int method_index, Bytecodes::Code bc,
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94 instanceKlassHandle& loading_klass);
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95
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96 JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter);
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97
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98 private:
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99 CompileTask* _task;
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100 int _system_dictionary_modification_counter;
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101
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102 // Cache JVMTI state
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103 bool _jvmti_can_hotswap_or_post_breakpoint;
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104 bool _jvmti_can_access_local_variables;
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105 bool _jvmti_can_post_on_exceptions;
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106
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107 // Implementation methods for loading and constant pool access.
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108 static KlassHandle get_klass_by_name_impl(KlassHandle& accessing_klass,
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109 constantPoolHandle& cpool,
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110 Symbol* klass_name,
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111 bool require_local);
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112 static KlassHandle get_klass_by_index_impl(constantPoolHandle& cpool,
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113 int klass_index,
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114 bool& is_accessible,
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115 KlassHandle& loading_klass);
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116 static void get_field_by_index_impl(instanceKlassHandle& loading_klass, fieldDescriptor& fd,
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117 int field_index);
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118 static methodHandle get_method_by_index_impl(constantPoolHandle& cpool,
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119 int method_index, Bytecodes::Code bc,
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120 instanceKlassHandle& loading_klass);
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121
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122 // Helper methods
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123 static bool check_klass_accessibility(KlassHandle accessing_klass, KlassHandle resolved_klass);
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124 static methodHandle lookup_method(instanceKlassHandle& accessor,
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125 instanceKlassHandle& holder,
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126 Symbol* name,
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127 Symbol* sig,
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128 Bytecodes::Code bc);
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129
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130 private:
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131
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132 // Is this thread currently in the VM state?
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133 static bool is_in_vm();
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134
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135 // Helper routine for determining the validity of a compilation
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136 // with respect to concurrent class loading.
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137 static JVMCIEnv::CodeInstallResult check_for_system_dictionary_modification(Dependencies* target, Handle compiled_code,
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138 JVMCIEnv* env, char** failure_detail);
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139
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140 public:
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141 CompileTask* task() { return _task; }
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142
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143 // Register the result of a compilation.
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144 static JVMCIEnv::CodeInstallResult register_method(
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145 methodHandle& target,
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146 nmethod*& nm,
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147 int entry_bci,
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148 CodeOffsets* offsets,
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149 int orig_pc_offset,
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150 CodeBuffer* code_buffer,
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151 int frame_words,
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152 OopMapSet* oop_map_set,
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153 ExceptionHandlerTable* handler_table,
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154 AbstractCompiler* compiler,
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155 DebugInformationRecorder* debug_info,
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156 Dependencies* dependencies,
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157 JVMCIEnv* env,
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158 int compile_id,
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159 bool has_unsafe_access,
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160 bool has_wide_vector,
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161 Handle installed_code,
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162 Handle compiled_code,
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163 Handle speculation_log);
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164
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165 // converts the Klass* representing the holder of a method into a
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166 // InstanceKlass*. This is needed since the holder of a method in
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167 // the bytecodes could be an array type. Basically this converts
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168 // array types into java/lang/Object and other types stay as they are.
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169 static instanceKlassHandle get_instance_klass_for_declared_method_holder(KlassHandle& klass);
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170 };
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171
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172 #endif // SHARE_VM_JVMCI_JVMCIENV_HPP