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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 |