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0
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1 /*
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2 * Copyright 1999-2007 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/_ciEnv.cpp.incl"
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27
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28 // ciEnv
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29 //
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30 // This class is the top level broker for requests from the compiler
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31 // to the VM.
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32
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33 ciObject* ciEnv::_null_object_instance;
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34 ciMethodKlass* ciEnv::_method_klass_instance;
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35 ciSymbolKlass* ciEnv::_symbol_klass_instance;
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36 ciKlassKlass* ciEnv::_klass_klass_instance;
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37 ciInstanceKlassKlass* ciEnv::_instance_klass_klass_instance;
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38 ciTypeArrayKlassKlass* ciEnv::_type_array_klass_klass_instance;
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39 ciObjArrayKlassKlass* ciEnv::_obj_array_klass_klass_instance;
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40
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41 ciInstanceKlass* ciEnv::_ArrayStoreException;
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42 ciInstanceKlass* ciEnv::_Class;
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43 ciInstanceKlass* ciEnv::_ClassCastException;
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44 ciInstanceKlass* ciEnv::_Object;
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45 ciInstanceKlass* ciEnv::_Throwable;
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46 ciInstanceKlass* ciEnv::_Thread;
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47 ciInstanceKlass* ciEnv::_OutOfMemoryError;
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48 ciInstanceKlass* ciEnv::_String;
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49
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50 ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
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51 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
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52 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
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53
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54 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
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55 jobject ciEnv::_ArrayStoreException_handle = NULL;
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56 jobject ciEnv::_ClassCastException_handle = NULL;
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57
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58 #ifndef PRODUCT
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59 static bool firstEnv = true;
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60 #endif /* PRODUCT */
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61
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62 // ------------------------------------------------------------------
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63 // ciEnv::ciEnv
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64 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) {
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65 VM_ENTRY_MARK;
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66
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67 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
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68 thread->set_env(this);
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69 assert(ciEnv::current() == this, "sanity");
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70
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71 _oop_recorder = NULL;
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72 _debug_info = NULL;
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73 _dependencies = NULL;
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74 _failure_reason = NULL;
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75 _compilable = MethodCompilable;
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76 _break_at_compile = false;
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77 _compiler_data = NULL;
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78 #ifndef PRODUCT
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79 assert(!firstEnv, "not initialized properly");
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80 #endif /* !PRODUCT */
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81
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82 _system_dictionary_modification_counter = system_dictionary_modification_counter;
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83 _num_inlined_bytecodes = 0;
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84 assert(task == NULL || thread->task() == task, "sanity");
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85 _task = task;
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86 _log = NULL;
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87
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88 // Temporary buffer for creating symbols and such.
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89 _name_buffer = NULL;
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90 _name_buffer_len = 0;
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91
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92 _arena = &_ciEnv_arena;
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93 _factory = new (_arena) ciObjectFactory(_arena, 128);
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94
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95 // Preload commonly referenced system ciObjects.
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96
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97 // During VM initialization, these instances have not yet been created.
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98 // Assertions ensure that these instances are not accessed before
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99 // their initialization.
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100
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101 assert(Universe::is_fully_initialized(), "should be complete");
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102
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103 oop o = Universe::null_ptr_exception_instance();
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104 assert(o != NULL, "should have been initialized");
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105 _NullPointerException_instance = get_object(o)->as_instance();
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106 o = Universe::arithmetic_exception_instance();
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107 assert(o != NULL, "should have been initialized");
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108 _ArithmeticException_instance = get_object(o)->as_instance();
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109
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110 _ArrayIndexOutOfBoundsException_instance = NULL;
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111 _ArrayStoreException_instance = NULL;
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112 _ClassCastException_instance = NULL;
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113 }
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114
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115 ciEnv::ciEnv(Arena* arena) {
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116 ASSERT_IN_VM;
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117
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118 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
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119 CompilerThread* current_thread = CompilerThread::current();
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120 assert(current_thread->env() == NULL, "must be");
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121 current_thread->set_env(this);
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122 assert(ciEnv::current() == this, "sanity");
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123
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124 _oop_recorder = NULL;
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125 _debug_info = NULL;
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126 _dependencies = NULL;
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127 _failure_reason = NULL;
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128 _compilable = MethodCompilable_never;
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129 _break_at_compile = false;
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130 _compiler_data = NULL;
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131 #ifndef PRODUCT
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132 assert(firstEnv, "must be first");
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133 firstEnv = false;
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134 #endif /* !PRODUCT */
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135
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136 _system_dictionary_modification_counter = 0;
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137 _num_inlined_bytecodes = 0;
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138 _task = NULL;
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139 _log = NULL;
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140
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141 // Temporary buffer for creating symbols and such.
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142 _name_buffer = NULL;
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143 _name_buffer_len = 0;
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144
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145 _arena = arena;
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146 _factory = new (_arena) ciObjectFactory(_arena, 128);
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147
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148 // Preload commonly referenced system ciObjects.
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149
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150 // During VM initialization, these instances have not yet been created.
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151 // Assertions ensure that these instances are not accessed before
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152 // their initialization.
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153
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154 assert(Universe::is_fully_initialized(), "must be");
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155
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156 oop o = Universe::null_ptr_exception_instance();
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157 assert(o != NULL, "should have been initialized");
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158 _NullPointerException_instance = get_object(o)->as_instance();
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159 o = Universe::arithmetic_exception_instance();
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160 assert(o != NULL, "should have been initialized");
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161 _ArithmeticException_instance = get_object(o)->as_instance();
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162
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163 _ArrayIndexOutOfBoundsException_instance = NULL;
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164 _ArrayStoreException_instance = NULL;
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165 _ClassCastException_instance = NULL;
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166 }
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167
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168 ciEnv::~ciEnv() {
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169 CompilerThread* current_thread = CompilerThread::current();
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170 current_thread->set_env(NULL);
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171 }
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172
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173 // ------------------------------------------------------------------
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174 // helper for lazy exception creation
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175 ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) {
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176 VM_ENTRY_MARK;
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177 if (handle == NULL) {
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178 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
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179 klassOop k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
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180 jobject objh = NULL;
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181 if (!HAS_PENDING_EXCEPTION && k != NULL) {
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182 oop obj = instanceKlass::cast(k)->allocate_permanent_instance(THREAD);
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183 if (!HAS_PENDING_EXCEPTION)
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184 objh = JNIHandles::make_global(obj);
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185 }
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186 if (HAS_PENDING_EXCEPTION) {
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187 CLEAR_PENDING_EXCEPTION;
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188 } else {
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189 handle = objh;
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190 }
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191 }
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192 oop obj = JNIHandles::resolve(handle);
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193 return obj == NULL? NULL: get_object(obj)->as_instance();
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194 }
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195
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196 // ------------------------------------------------------------------
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197 // ciEnv::ArrayIndexOutOfBoundsException_instance, etc.
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198 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
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199 if (_ArrayIndexOutOfBoundsException_instance == NULL) {
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200 _ArrayIndexOutOfBoundsException_instance
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201 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
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202 vmSymbolHandles::java_lang_ArrayIndexOutOfBoundsException());
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203 }
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204 return _ArrayIndexOutOfBoundsException_instance;
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205 }
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206 ciInstance* ciEnv::ArrayStoreException_instance() {
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207 if (_ArrayStoreException_instance == NULL) {
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208 _ArrayStoreException_instance
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209 = get_or_create_exception(_ArrayStoreException_handle,
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210 vmSymbolHandles::java_lang_ArrayStoreException());
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211 }
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212 return _ArrayStoreException_instance;
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213 }
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214 ciInstance* ciEnv::ClassCastException_instance() {
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215 if (_ClassCastException_instance == NULL) {
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216 _ClassCastException_instance
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217 = get_or_create_exception(_ClassCastException_handle,
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218 vmSymbolHandles::java_lang_ClassCastException());
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219 }
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220 return _ClassCastException_instance;
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221 }
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222
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223 // ------------------------------------------------------------------
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224 // ciEnv::get_method_from_handle
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225 ciMethod* ciEnv::get_method_from_handle(jobject method) {
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226 VM_ENTRY_MARK;
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227 return get_object(JNIHandles::resolve(method))->as_method();
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228 }
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229
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230 // ------------------------------------------------------------------
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231 // ciEnv::make_array
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232 ciArray* ciEnv::make_array(GrowableArray<ciObject*>* objects) {
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233 VM_ENTRY_MARK;
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234 int length = objects->length();
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235 objArrayOop a = oopFactory::new_system_objArray(length, THREAD);
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236 if (HAS_PENDING_EXCEPTION) {
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237 CLEAR_PENDING_EXCEPTION;
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238 record_out_of_memory_failure();
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239 return NULL;
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240 }
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241 for (int i = 0; i < length; i++) {
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242 a->obj_at_put(i, objects->at(i)->get_oop());
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243 }
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244 assert(a->is_perm(), "");
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245 return get_object(a)->as_array();
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246 }
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247
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248
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249 // ------------------------------------------------------------------
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250 // ciEnv::array_element_offset_in_bytes
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251 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
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252 VM_ENTRY_MARK;
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253 objArrayOop a = (objArrayOop)a_h->get_oop();
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254 assert(a->is_objArray(), "");
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255 int length = a->length();
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256 oop o = o_h->get_oop();
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257 for (int i = 0; i < length; i++) {
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258 if (a->obj_at(i) == o) return i;
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259 }
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260 return -1;
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261 }
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262
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263
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264 // ------------------------------------------------------------------
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265 // ciEnv::check_klass_accessiblity
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266 //
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267 // Note: the logic of this method should mirror the logic of
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268 // constantPoolOopDesc::verify_constant_pool_resolve.
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269 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
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270 klassOop resolved_klass) {
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271 if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
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272 return true;
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273 }
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274 if (accessing_klass->is_obj_array()) {
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275 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
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276 }
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277 if (!accessing_klass->is_instance_klass()) {
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278 return true;
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279 }
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280
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281 if (resolved_klass->klass_part()->oop_is_objArray()) {
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282 // Find the element klass, if this is an array.
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283 resolved_klass = objArrayKlass::cast(resolved_klass)->bottom_klass();
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284 }
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285 if (resolved_klass->klass_part()->oop_is_instance()) {
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286 return Reflection::verify_class_access(accessing_klass->get_klassOop(),
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287 resolved_klass,
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288 true);
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289 }
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290 return true;
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291 }
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292
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293 // ------------------------------------------------------------------
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294 // ciEnv::get_klass_by_name_impl
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295 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
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296 ciSymbol* name,
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297 bool require_local) {
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298 ASSERT_IN_VM;
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299 EXCEPTION_CONTEXT;
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300
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301 // Now we need to check the SystemDictionary
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302 symbolHandle sym(THREAD, name->get_symbolOop());
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303 if (sym->byte_at(0) == 'L' &&
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304 sym->byte_at(sym->utf8_length()-1) == ';') {
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305 // This is a name from a signature. Strip off the trimmings.
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306 sym = oopFactory::new_symbol_handle(sym->as_utf8()+1,
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307 sym->utf8_length()-2,
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308 KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
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309 name = get_object(sym())->as_symbol();
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310 }
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311
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312 // Check for prior unloaded klass. The SystemDictionary's answers
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313 // can vary over time but the compiler needs consistency.
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314 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
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315 if (unloaded_klass != NULL) {
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316 if (require_local) return NULL;
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317 return unloaded_klass;
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318 }
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319
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320 Handle loader(THREAD, (oop)NULL);
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321 Handle domain(THREAD, (oop)NULL);
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322 if (accessing_klass != NULL) {
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323 loader = Handle(THREAD, accessing_klass->loader());
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324 domain = Handle(THREAD, accessing_klass->protection_domain());
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325 }
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326
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327 // setup up the proper type to return on OOM
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328 ciKlass* fail_type;
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329 if (sym->byte_at(0) == '[') {
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330 fail_type = _unloaded_ciobjarrayklass;
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331 } else {
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332 fail_type = _unloaded_ciinstance_klass;
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333 }
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334 klassOop found_klass;
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335 if (!require_local) {
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336 found_klass =
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337 SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
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338 KILL_COMPILE_ON_FATAL_(fail_type));
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339 } else {
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340 found_klass =
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341 SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
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342 KILL_COMPILE_ON_FATAL_(fail_type));
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343 }
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344
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345 if (found_klass != NULL) {
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346 // Found it. Build a CI handle.
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347 return get_object(found_klass)->as_klass();
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348 }
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349
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350 // If we fail to find an array klass, look again for its element type.
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351 // The element type may be available either locally or via constraints.
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352 // In either case, if we can find the element type in the system dictionary,
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353 // we must build an array type around it. The CI requires array klasses
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354 // to be loaded if their element klasses are loaded, except when memory
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355 // is exhausted.
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356 if (sym->byte_at(0) == '[' &&
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357 (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
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358 // We have an unloaded array.
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359 // Build it on the fly if the element class exists.
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360 symbolOop elem_sym = oopFactory::new_symbol(sym->as_utf8()+1,
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361 sym->utf8_length()-1,
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362 KILL_COMPILE_ON_FATAL_(fail_type));
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363 // Get element ciKlass recursively.
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364 ciKlass* elem_klass =
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365 get_klass_by_name_impl(accessing_klass,
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366 get_object(elem_sym)->as_symbol(),
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367 require_local);
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368 if (elem_klass != NULL && elem_klass->is_loaded()) {
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369 // Now make an array for it
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370 return ciObjArrayKlass::make_impl(elem_klass);
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371 }
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372 }
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373
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374 if (require_local) return NULL;
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375 // Not yet loaded into the VM, or not governed by loader constraints.
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376 // Make a CI representative for it.
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377 return get_unloaded_klass(accessing_klass, name);
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378 }
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379
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380 // ------------------------------------------------------------------
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381 // ciEnv::get_klass_by_name
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382 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
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383 ciSymbol* klass_name,
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384 bool require_local) {
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385 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
|
|
|
386 klass_name,
|
|
|
387 require_local);)
|
|
|
388 }
|
|
|
389
|
|
|
390 // ------------------------------------------------------------------
|
|
|
391 // ciEnv::get_klass_by_index_impl
|
|
|
392 //
|
|
|
393 // Implementation of get_klass_by_index.
|
|
|
394 ciKlass* ciEnv::get_klass_by_index_impl(ciInstanceKlass* accessor,
|
|
|
395 int index,
|
|
|
396 bool& is_accessible) {
|
|
|
397 assert(accessor->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool");
|
|
|
398 EXCEPTION_CONTEXT;
|
|
|
399 constantPoolHandle cpool(THREAD, accessor->get_instanceKlass()->constants());
|
|
|
400 KlassHandle klass (THREAD, constantPoolOopDesc::klass_at_if_loaded(cpool, index));
|
|
|
401 symbolHandle klass_name;
|
|
|
402 if (klass.is_null()) {
|
|
|
403 // The klass has not been inserted into the constant pool.
|
|
|
404 // Try to look it up by name.
|
|
|
405 {
|
|
|
406 // We have to lock the cpool to keep the oop from being resolved
|
|
|
407 // while we are accessing it.
|
|
|
408 ObjectLocker ol(cpool, THREAD);
|
|
|
409
|
|
|
410 constantTag tag = cpool->tag_at(index);
|
|
|
411 if (tag.is_klass()) {
|
|
|
412 // The klass has been inserted into the constant pool
|
|
|
413 // very recently.
|
|
|
414 klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
|
|
|
415 } else if (tag.is_symbol()) {
|
|
|
416 klass_name = symbolHandle(THREAD, cpool->symbol_at(index));
|
|
|
417 } else {
|
|
|
418 assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
|
|
|
419 klass_name = symbolHandle(THREAD, cpool->unresolved_klass_at(index));
|
|
|
420 }
|
|
|
421 }
|
|
|
422 }
|
|
|
423
|
|
|
424 if (klass.is_null()) {
|
|
|
425 // Not found in constant pool. Use the name to do the lookup.
|
|
|
426 ciKlass* k = get_klass_by_name_impl(accessor,
|
|
|
427 get_object(klass_name())->as_symbol(),
|
|
|
428 false);
|
|
|
429 // Calculate accessibility the hard way.
|
|
|
430 if (!k->is_loaded()) {
|
|
|
431 is_accessible = false;
|
|
|
432 } else if (k->loader() != accessor->loader() &&
|
|
|
433 get_klass_by_name_impl(accessor, k->name(), true) == NULL) {
|
|
|
434 // Loaded only remotely. Not linked yet.
|
|
|
435 is_accessible = false;
|
|
|
436 } else {
|
|
|
437 // Linked locally, and we must also check public/private, etc.
|
|
|
438 is_accessible = check_klass_accessibility(accessor, k->get_klassOop());
|
|
|
439 }
|
|
|
440 return k;
|
|
|
441 }
|
|
|
442
|
|
|
443 // Check for prior unloaded klass. The SystemDictionary's answers
|
|
|
444 // can vary over time but the compiler needs consistency.
|
|
|
445 ciSymbol* name = get_object(klass()->klass_part()->name())->as_symbol();
|
|
|
446 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
|
|
|
447 if (unloaded_klass != NULL) {
|
|
|
448 is_accessible = false;
|
|
|
449 return unloaded_klass;
|
|
|
450 }
|
|
|
451
|
|
|
452 // It is known to be accessible, since it was found in the constant pool.
|
|
|
453 is_accessible = true;
|
|
|
454 return get_object(klass())->as_klass();
|
|
|
455 }
|
|
|
456
|
|
|
457 // ------------------------------------------------------------------
|
|
|
458 // ciEnv::get_klass_by_index
|
|
|
459 //
|
|
|
460 // Get a klass from the constant pool.
|
|
|
461 ciKlass* ciEnv::get_klass_by_index(ciInstanceKlass* accessor,
|
|
|
462 int index,
|
|
|
463 bool& is_accessible) {
|
|
|
464 GUARDED_VM_ENTRY(return get_klass_by_index_impl(accessor, index, is_accessible);)
|
|
|
465 }
|
|
|
466
|
|
|
467 // ------------------------------------------------------------------
|
|
|
468 // ciEnv::get_constant_by_index_impl
|
|
|
469 //
|
|
|
470 // Implementation of get_constant_by_index().
|
|
|
471 ciConstant ciEnv::get_constant_by_index_impl(ciInstanceKlass* accessor,
|
|
|
472 int index) {
|
|
|
473 EXCEPTION_CONTEXT;
|
|
|
474 instanceKlass* ik_accessor = accessor->get_instanceKlass();
|
|
|
475 assert(ik_accessor->is_linked(), "must be linked before accessing constant pool");
|
|
|
476 constantPoolOop cpool = ik_accessor->constants();
|
|
|
477 constantTag tag = cpool->tag_at(index);
|
|
|
478 if (tag.is_int()) {
|
|
|
479 return ciConstant(T_INT, (jint)cpool->int_at(index));
|
|
|
480 } else if (tag.is_long()) {
|
|
|
481 return ciConstant((jlong)cpool->long_at(index));
|
|
|
482 } else if (tag.is_float()) {
|
|
|
483 return ciConstant((jfloat)cpool->float_at(index));
|
|
|
484 } else if (tag.is_double()) {
|
|
|
485 return ciConstant((jdouble)cpool->double_at(index));
|
|
|
486 } else if (tag.is_string() || tag.is_unresolved_string()) {
|
|
|
487 oop string = cpool->string_at(index, THREAD);
|
|
|
488 if (HAS_PENDING_EXCEPTION) {
|
|
|
489 CLEAR_PENDING_EXCEPTION;
|
|
|
490 record_out_of_memory_failure();
|
|
|
491 return ciConstant();
|
|
|
492 }
|
|
|
493 ciObject* constant = get_object(string);
|
|
|
494 assert (constant->is_instance(), "must be an instance, or not? ");
|
|
|
495 return ciConstant(T_OBJECT, constant);
|
|
|
496 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
|
|
|
497 // 4881222: allow ldc to take a class type
|
|
|
498 bool ignore;
|
|
|
499 ciKlass* klass = get_klass_by_index_impl(accessor, index, ignore);
|
|
|
500 if (HAS_PENDING_EXCEPTION) {
|
|
|
501 CLEAR_PENDING_EXCEPTION;
|
|
|
502 record_out_of_memory_failure();
|
|
|
503 return ciConstant();
|
|
|
504 }
|
|
|
505 assert (klass->is_instance_klass() || klass->is_array_klass(),
|
|
|
506 "must be an instance or array klass ");
|
|
|
507 return ciConstant(T_OBJECT, klass);
|
|
|
508 } else {
|
|
|
509 ShouldNotReachHere();
|
|
|
510 return ciConstant();
|
|
|
511 }
|
|
|
512 }
|
|
|
513
|
|
|
514 // ------------------------------------------------------------------
|
|
|
515 // ciEnv::is_unresolved_string_impl
|
|
|
516 //
|
|
|
517 // Implementation of is_unresolved_string().
|
|
|
518 bool ciEnv::is_unresolved_string_impl(instanceKlass* accessor, int index) const {
|
|
|
519 EXCEPTION_CONTEXT;
|
|
|
520 assert(accessor->is_linked(), "must be linked before accessing constant pool");
|
|
|
521 constantPoolOop cpool = accessor->constants();
|
|
|
522 constantTag tag = cpool->tag_at(index);
|
|
|
523 return tag.is_unresolved_string();
|
|
|
524 }
|
|
|
525
|
|
|
526 // ------------------------------------------------------------------
|
|
|
527 // ciEnv::is_unresolved_klass_impl
|
|
|
528 //
|
|
|
529 // Implementation of is_unresolved_klass().
|
|
|
530 bool ciEnv::is_unresolved_klass_impl(instanceKlass* accessor, int index) const {
|
|
|
531 EXCEPTION_CONTEXT;
|
|
|
532 assert(accessor->is_linked(), "must be linked before accessing constant pool");
|
|
|
533 constantPoolOop cpool = accessor->constants();
|
|
|
534 constantTag tag = cpool->tag_at(index);
|
|
|
535 return tag.is_unresolved_klass();
|
|
|
536 }
|
|
|
537
|
|
|
538 // ------------------------------------------------------------------
|
|
|
539 // ciEnv::get_constant_by_index
|
|
|
540 //
|
|
|
541 // Pull a constant out of the constant pool. How appropriate.
|
|
|
542 //
|
|
|
543 // Implementation note: this query is currently in no way cached.
|
|
|
544 ciConstant ciEnv::get_constant_by_index(ciInstanceKlass* accessor,
|
|
|
545 int index) {
|
|
|
546 GUARDED_VM_ENTRY(return get_constant_by_index_impl(accessor, index); )
|
|
|
547 }
|
|
|
548
|
|
|
549 // ------------------------------------------------------------------
|
|
|
550 // ciEnv::is_unresolved_string
|
|
|
551 //
|
|
|
552 // Check constant pool
|
|
|
553 //
|
|
|
554 // Implementation note: this query is currently in no way cached.
|
|
|
555 bool ciEnv::is_unresolved_string(ciInstanceKlass* accessor,
|
|
|
556 int index) const {
|
|
|
557 GUARDED_VM_ENTRY(return is_unresolved_string_impl(accessor->get_instanceKlass(), index); )
|
|
|
558 }
|
|
|
559
|
|
|
560 // ------------------------------------------------------------------
|
|
|
561 // ciEnv::is_unresolved_klass
|
|
|
562 //
|
|
|
563 // Check constant pool
|
|
|
564 //
|
|
|
565 // Implementation note: this query is currently in no way cached.
|
|
|
566 bool ciEnv::is_unresolved_klass(ciInstanceKlass* accessor,
|
|
|
567 int index) const {
|
|
|
568 GUARDED_VM_ENTRY(return is_unresolved_klass_impl(accessor->get_instanceKlass(), index); )
|
|
|
569 }
|
|
|
570
|
|
|
571 // ------------------------------------------------------------------
|
|
|
572 // ciEnv::get_field_by_index_impl
|
|
|
573 //
|
|
|
574 // Implementation of get_field_by_index.
|
|
|
575 //
|
|
|
576 // Implementation note: the results of field lookups are cached
|
|
|
577 // in the accessor klass.
|
|
|
578 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
|
|
|
579 int index) {
|
|
|
580 ciConstantPoolCache* cache = accessor->field_cache();
|
|
|
581 if (cache == NULL) {
|
|
|
582 ciField* field = new (arena()) ciField(accessor, index);
|
|
|
583 return field;
|
|
|
584 } else {
|
|
|
585 ciField* field = (ciField*)cache->get(index);
|
|
|
586 if (field == NULL) {
|
|
|
587 field = new (arena()) ciField(accessor, index);
|
|
|
588 cache->insert(index, field);
|
|
|
589 }
|
|
|
590 return field;
|
|
|
591 }
|
|
|
592 }
|
|
|
593
|
|
|
594 // ------------------------------------------------------------------
|
|
|
595 // ciEnv::get_field_by_index
|
|
|
596 //
|
|
|
597 // Get a field by index from a klass's constant pool.
|
|
|
598 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
|
|
|
599 int index) {
|
|
|
600 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
|
|
|
601 }
|
|
|
602
|
|
|
603 // ------------------------------------------------------------------
|
|
|
604 // ciEnv::lookup_method
|
|
|
605 //
|
|
|
606 // Perform an appropriate method lookup based on accessor, holder,
|
|
|
607 // name, signature, and bytecode.
|
|
|
608 methodOop ciEnv::lookup_method(instanceKlass* accessor,
|
|
|
609 instanceKlass* holder,
|
|
|
610 symbolOop name,
|
|
|
611 symbolOop sig,
|
|
|
612 Bytecodes::Code bc) {
|
|
|
613 EXCEPTION_CONTEXT;
|
|
|
614 KlassHandle h_accessor(THREAD, accessor);
|
|
|
615 KlassHandle h_holder(THREAD, holder);
|
|
|
616 symbolHandle h_name(THREAD, name);
|
|
|
617 symbolHandle h_sig(THREAD, sig);
|
|
|
618 LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
|
|
|
619 methodHandle dest_method;
|
|
|
620 switch (bc) {
|
|
|
621 case Bytecodes::_invokestatic:
|
|
|
622 dest_method =
|
|
|
623 LinkResolver::resolve_static_call_or_null(h_holder, h_name, h_sig, h_accessor);
|
|
|
624 break;
|
|
|
625 case Bytecodes::_invokespecial:
|
|
|
626 dest_method =
|
|
|
627 LinkResolver::resolve_special_call_or_null(h_holder, h_name, h_sig, h_accessor);
|
|
|
628 break;
|
|
|
629 case Bytecodes::_invokeinterface:
|
|
|
630 dest_method =
|
|
|
631 LinkResolver::linktime_resolve_interface_method_or_null(h_holder, h_name, h_sig,
|
|
|
632 h_accessor, true);
|
|
|
633 break;
|
|
|
634 case Bytecodes::_invokevirtual:
|
|
|
635 dest_method =
|
|
|
636 LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, h_name, h_sig,
|
|
|
637 h_accessor, true);
|
|
|
638 break;
|
|
|
639 default: ShouldNotReachHere();
|
|
|
640 }
|
|
|
641
|
|
|
642 return dest_method();
|
|
|
643 }
|
|
|
644
|
|
|
645
|
|
|
646 // ------------------------------------------------------------------
|
|
|
647 // ciEnv::get_method_by_index_impl
|
|
|
648 ciMethod* ciEnv::get_method_by_index_impl(ciInstanceKlass* accessor,
|
|
|
649 int index, Bytecodes::Code bc) {
|
|
|
650 // Get the method's declared holder.
|
|
|
651
|
|
|
652 assert(accessor->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool");
|
|
|
653 constantPoolHandle cpool = accessor->get_instanceKlass()->constants();
|
|
|
654 int holder_index = cpool->klass_ref_index_at(index);
|
|
|
655 bool holder_is_accessible;
|
|
|
656 ciKlass* holder = get_klass_by_index_impl(accessor, holder_index, holder_is_accessible);
|
|
|
657 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
|
|
|
658
|
|
|
659 // Get the method's name and signature.
|
|
|
660 int nt_index = cpool->name_and_type_ref_index_at(index);
|
|
|
661 int sig_index = cpool->signature_ref_index_at(nt_index);
|
|
|
662 symbolOop name_sym = cpool->name_ref_at(index);
|
|
|
663 symbolOop sig_sym = cpool->symbol_at(sig_index);
|
|
|
664
|
|
|
665 if (holder_is_accessible) { // Our declared holder is loaded.
|
|
|
666 instanceKlass* lookup = declared_holder->get_instanceKlass();
|
|
|
667 methodOop m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
|
|
|
668 if (m != NULL) {
|
|
|
669 // We found the method.
|
|
|
670 return get_object(m)->as_method();
|
|
|
671 }
|
|
|
672 }
|
|
|
673
|
|
|
674 // Either the declared holder was not loaded, or the method could
|
|
|
675 // not be found. Create a dummy ciMethod to represent the failed
|
|
|
676 // lookup.
|
|
|
677
|
|
|
678 return get_unloaded_method(declared_holder,
|
|
|
679 get_object(name_sym)->as_symbol(),
|
|
|
680 get_object(sig_sym)->as_symbol());
|
|
|
681 }
|
|
|
682
|
|
|
683
|
|
|
684 // ------------------------------------------------------------------
|
|
|
685 // ciEnv::get_instance_klass_for_declared_method_holder
|
|
|
686 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
|
|
|
687 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
|
|
|
688 // instead of a ciInstanceKlass. For that case simply pretend that the
|
|
|
689 // declared holder is Object.clone since that's where the call will bottom out.
|
|
|
690 // A more correct fix would trickle out through many interfaces in CI,
|
|
|
691 // requiring ciInstanceKlass* to become ciKlass* and many more places would
|
|
|
692 // require checks to make sure the expected type was found. Given that this
|
|
|
693 // only occurs for clone() the more extensive fix seems like overkill so
|
|
|
694 // instead we simply smear the array type into Object.
|
|
|
695 if (method_holder->is_instance_klass()) {
|
|
|
696 return method_holder->as_instance_klass();
|
|
|
697 } else if (method_holder->is_array_klass()) {
|
|
|
698 return current()->Object_klass();
|
|
|
699 } else {
|
|
|
700 ShouldNotReachHere();
|
|
|
701 }
|
|
|
702 return NULL;
|
|
|
703 }
|
|
|
704
|
|
|
705
|
|
|
706
|
|
|
707
|
|
|
708 // ------------------------------------------------------------------
|
|
|
709 // ciEnv::get_method_by_index
|
|
|
710 ciMethod* ciEnv::get_method_by_index(ciInstanceKlass* accessor,
|
|
|
711 int index, Bytecodes::Code bc) {
|
|
|
712 GUARDED_VM_ENTRY(return get_method_by_index_impl(accessor, index, bc);)
|
|
|
713 }
|
|
|
714
|
|
|
715 // ------------------------------------------------------------------
|
|
|
716 // ciEnv::name_buffer
|
|
|
717 char *ciEnv::name_buffer(int req_len) {
|
|
|
718 if (_name_buffer_len < req_len) {
|
|
|
719 if (_name_buffer == NULL) {
|
|
|
720 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
|
|
|
721 _name_buffer_len = req_len;
|
|
|
722 } else {
|
|
|
723 _name_buffer =
|
|
|
724 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
|
|
|
725 _name_buffer_len = req_len;
|
|
|
726 }
|
|
|
727 }
|
|
|
728 return _name_buffer;
|
|
|
729 }
|
|
|
730
|
|
|
731 // ------------------------------------------------------------------
|
|
|
732 // ciEnv::is_in_vm
|
|
|
733 bool ciEnv::is_in_vm() {
|
|
|
734 return JavaThread::current()->thread_state() == _thread_in_vm;
|
|
|
735 }
|
|
|
736
|
|
|
737 bool ciEnv::system_dictionary_modification_counter_changed() {
|
|
|
738 return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
|
|
|
739 }
|
|
|
740
|
|
|
741 // ------------------------------------------------------------------
|
|
|
742 // ciEnv::check_for_system_dictionary_modification
|
|
|
743 // Check for changes to the system dictionary during compilation
|
|
|
744 // class loads, evolution, breakpoints
|
|
|
745 void ciEnv::check_for_system_dictionary_modification(ciMethod* target) {
|
|
|
746 if (failing()) return; // no need for further checks
|
|
|
747
|
|
|
748 // Dependencies must be checked when the system dictionary changes.
|
|
|
749 // If logging is enabled all violated dependences will be recorded in
|
|
|
750 // the log. In debug mode check dependencies even if the system
|
|
|
751 // dictionary hasn't changed to verify that no invalid dependencies
|
|
|
752 // were inserted. Any violated dependences in this case are dumped to
|
|
|
753 // the tty.
|
|
|
754
|
|
|
755 bool counter_changed = system_dictionary_modification_counter_changed();
|
|
|
756 bool test_deps = counter_changed;
|
|
|
757 DEBUG_ONLY(test_deps = true);
|
|
|
758 if (!test_deps) return;
|
|
|
759
|
|
|
760 bool print_failures = false;
|
|
|
761 DEBUG_ONLY(print_failures = !counter_changed);
|
|
|
762
|
|
|
763 bool keep_going = (print_failures || xtty != NULL);
|
|
|
764
|
|
|
765 int violated = 0;
|
|
|
766
|
|
|
767 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
|
|
|
768 klassOop witness = deps.check_dependency();
|
|
|
769 if (witness != NULL) {
|
|
|
770 ++violated;
|
|
|
771 if (print_failures) deps.print_dependency(witness, /*verbose=*/ true);
|
|
|
772 // If there's no log and we're not sanity-checking, we're done.
|
|
|
773 if (!keep_going) break;
|
|
|
774 }
|
|
|
775 }
|
|
|
776
|
|
|
777 if (violated != 0) {
|
|
|
778 assert(counter_changed, "failed dependencies, but counter didn't change");
|
|
|
779 record_failure("concurrent class loading");
|
|
|
780 }
|
|
|
781 }
|
|
|
782
|
|
|
783 // ------------------------------------------------------------------
|
|
|
784 // ciEnv::register_method
|
|
|
785 void ciEnv::register_method(ciMethod* target,
|
|
|
786 int entry_bci,
|
|
|
787 CodeOffsets* offsets,
|
|
|
788 int orig_pc_offset,
|
|
|
789 CodeBuffer* code_buffer,
|
|
|
790 int frame_words,
|
|
|
791 OopMapSet* oop_map_set,
|
|
|
792 ExceptionHandlerTable* handler_table,
|
|
|
793 ImplicitExceptionTable* inc_table,
|
|
|
794 AbstractCompiler* compiler,
|
|
|
795 int comp_level,
|
|
|
796 bool has_debug_info,
|
|
|
797 bool has_unsafe_access) {
|
|
|
798 VM_ENTRY_MARK;
|
|
|
799 nmethod* nm = NULL;
|
|
|
800 {
|
|
|
801 // To prevent compile queue updates.
|
|
|
802 MutexLocker locker(MethodCompileQueue_lock, THREAD);
|
|
|
803
|
|
|
804 // Prevent SystemDictionary::add_to_hierarchy from running
|
|
|
805 // and invalidating our dependencies until we install this method.
|
|
|
806 MutexLocker ml(Compile_lock);
|
|
|
807
|
|
|
808 if (log() != NULL) {
|
|
|
809 // Log the dependencies which this compilation declares.
|
|
|
810 dependencies()->log_all_dependencies();
|
|
|
811 }
|
|
|
812
|
|
|
813 // Encode the dependencies now, so we can check them right away.
|
|
|
814 dependencies()->encode_content_bytes();
|
|
|
815
|
|
|
816 // Check for {class loads, evolution, breakpoints} during compilation
|
|
|
817 check_for_system_dictionary_modification(target);
|
|
|
818
|
|
|
819 methodHandle method(THREAD, target->get_methodOop());
|
|
|
820
|
|
|
821 if (failing()) {
|
|
|
822 // While not a true deoptimization, it is a preemptive decompile.
|
|
|
823 methodDataOop mdo = method()->method_data();
|
|
|
824 if (mdo != NULL) {
|
|
|
825 mdo->inc_decompile_count();
|
|
|
826 }
|
|
|
827
|
|
|
828 // All buffers in the CodeBuffer are allocated in the CodeCache.
|
|
|
829 // If the code buffer is created on each compile attempt
|
|
|
830 // as in C2, then it must be freed.
|
|
|
831 code_buffer->free_blob();
|
|
|
832 return;
|
|
|
833 }
|
|
|
834
|
|
|
835 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
|
|
|
836 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
|
|
|
837
|
|
|
838 nm = nmethod::new_nmethod(method,
|
|
|
839 compile_id(),
|
|
|
840 entry_bci,
|
|
|
841 offsets,
|
|
|
842 orig_pc_offset,
|
|
|
843 debug_info(), dependencies(), code_buffer,
|
|
|
844 frame_words, oop_map_set,
|
|
|
845 handler_table, inc_table,
|
|
|
846 compiler, comp_level);
|
|
|
847
|
|
|
848 // Free codeBlobs
|
|
|
849 code_buffer->free_blob();
|
|
|
850
|
|
|
851 // stress test 6243940 by immediately making the method
|
|
|
852 // non-entrant behind the system's back. This has serious
|
|
|
853 // side effects on the code cache and is not meant for
|
|
|
854 // general stress testing
|
|
|
855 if (nm != NULL && StressNonEntrant) {
|
|
|
856 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
|
|
|
857 NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(),
|
|
|
858 SharedRuntime::get_handle_wrong_method_stub());
|
|
|
859 }
|
|
|
860
|
|
|
861 if (nm == NULL) {
|
|
|
862 // The CodeCache is full. Print out warning and disable compilation.
|
|
|
863 record_failure("code cache is full");
|
|
|
864 UseInterpreter = true;
|
|
|
865 if (UseCompiler || AlwaysCompileLoopMethods ) {
|
|
|
866 #ifndef PRODUCT
|
|
|
867 warning("CodeCache is full. Compiler has been disabled");
|
|
|
868 if (CompileTheWorld || ExitOnFullCodeCache) {
|
|
|
869 before_exit(JavaThread::current());
|
|
|
870 exit_globals(); // will delete tty
|
|
|
871 vm_direct_exit(CompileTheWorld ? 0 : 1);
|
|
|
872 }
|
|
|
873 #endif
|
|
|
874 UseCompiler = false;
|
|
|
875 AlwaysCompileLoopMethods = false;
|
|
|
876 }
|
|
|
877 } else {
|
|
|
878 NOT_PRODUCT(nm->set_has_debug_info(has_debug_info); )
|
|
|
879 nm->set_has_unsafe_access(has_unsafe_access);
|
|
|
880
|
|
|
881 // Record successful registration.
|
|
|
882 // (Put nm into the task handle *before* publishing to the Java heap.)
|
|
|
883 if (task() != NULL) task()->set_code(nm);
|
|
|
884
|
|
|
885 if (entry_bci == InvocationEntryBci) {
|
|
|
886 #ifdef TIERED
|
|
|
887 // If there is an old version we're done with it
|
|
|
888 nmethod* old = method->code();
|
|
|
889 if (TraceMethodReplacement && old != NULL) {
|
|
|
890 ResourceMark rm;
|
|
|
891 char *method_name = method->name_and_sig_as_C_string();
|
|
|
892 tty->print_cr("Replacing method %s", method_name);
|
|
|
893 }
|
|
|
894 if (old != NULL ) {
|
|
|
895 old->make_not_entrant();
|
|
|
896 }
|
|
|
897 #endif // TIERED
|
|
|
898 if (TraceNMethodInstalls ) {
|
|
|
899 ResourceMark rm;
|
|
|
900 char *method_name = method->name_and_sig_as_C_string();
|
|
|
901 ttyLocker ttyl;
|
|
|
902 tty->print_cr("Installing method (%d) %s ",
|
|
|
903 comp_level,
|
|
|
904 method_name);
|
|
|
905 }
|
|
|
906 // Allow the code to be executed
|
|
|
907 method->set_code(method, nm);
|
|
|
908 } else {
|
|
|
909 if (TraceNMethodInstalls ) {
|
|
|
910 ResourceMark rm;
|
|
|
911 char *method_name = method->name_and_sig_as_C_string();
|
|
|
912 ttyLocker ttyl;
|
|
|
913 tty->print_cr("Installing osr method (%d) %s @ %d",
|
|
|
914 comp_level,
|
|
|
915 method_name,
|
|
|
916 entry_bci);
|
|
|
917 }
|
|
|
918 instanceKlass::cast(method->method_holder())->add_osr_nmethod(nm);
|
|
|
919
|
|
|
920 }
|
|
|
921 }
|
|
|
922 }
|
|
|
923 // JVMTI -- compiled method notification (must be done outside lock)
|
|
|
924 if (nm != NULL) {
|
|
|
925 nm->post_compiled_method_load_event();
|
|
|
926 }
|
|
|
927
|
|
|
928 }
|
|
|
929
|
|
|
930
|
|
|
931 // ------------------------------------------------------------------
|
|
|
932 // ciEnv::find_system_klass
|
|
|
933 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
|
|
|
934 VM_ENTRY_MARK;
|
|
|
935 return get_klass_by_name_impl(NULL, klass_name, false);
|
|
|
936 }
|
|
|
937
|
|
|
938 // ------------------------------------------------------------------
|
|
|
939 // ciEnv::comp_level
|
|
|
940 int ciEnv::comp_level() {
|
|
|
941 if (task() == NULL) return CompLevel_full_optimization;
|
|
|
942 return task()->comp_level();
|
|
|
943 }
|
|
|
944
|
|
|
945 // ------------------------------------------------------------------
|
|
|
946 // ciEnv::compile_id
|
|
|
947 uint ciEnv::compile_id() {
|
|
|
948 if (task() == NULL) return 0;
|
|
|
949 return task()->compile_id();
|
|
|
950 }
|
|
|
951
|
|
|
952 // ------------------------------------------------------------------
|
|
|
953 // ciEnv::notice_inlined_method()
|
|
|
954 void ciEnv::notice_inlined_method(ciMethod* method) {
|
|
|
955 _num_inlined_bytecodes += method->code_size();
|
|
|
956 }
|
|
|
957
|
|
|
958 // ------------------------------------------------------------------
|
|
|
959 // ciEnv::num_inlined_bytecodes()
|
|
|
960 int ciEnv::num_inlined_bytecodes() const {
|
|
|
961 return _num_inlined_bytecodes;
|
|
|
962 }
|
|
|
963
|
|
|
964 // ------------------------------------------------------------------
|
|
|
965 // ciEnv::record_failure()
|
|
|
966 void ciEnv::record_failure(const char* reason) {
|
|
|
967 if (log() != NULL) {
|
|
|
968 log()->elem("failure reason='%s'", reason);
|
|
|
969 }
|
|
|
970 if (_failure_reason == NULL) {
|
|
|
971 // Record the first failure reason.
|
|
|
972 _failure_reason = reason;
|
|
|
973 }
|
|
|
974 }
|
|
|
975
|
|
|
976 // ------------------------------------------------------------------
|
|
|
977 // ciEnv::record_method_not_compilable()
|
|
|
978 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
|
|
|
979 int new_compilable =
|
|
|
980 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
|
|
|
981
|
|
|
982 // Only note transitions to a worse state
|
|
|
983 if (new_compilable > _compilable) {
|
|
|
984 if (log() != NULL) {
|
|
|
985 if (all_tiers) {
|
|
|
986 log()->elem("method_not_compilable");
|
|
|
987 } else {
|
|
|
988 log()->elem("method_not_compilable_at_tier");
|
|
|
989 }
|
|
|
990 }
|
|
|
991 _compilable = new_compilable;
|
|
|
992
|
|
|
993 // Reset failure reason; this one is more important.
|
|
|
994 _failure_reason = NULL;
|
|
|
995 record_failure(reason);
|
|
|
996 }
|
|
|
997 }
|
|
|
998
|
|
|
999 // ------------------------------------------------------------------
|
|
|
1000 // ciEnv::record_out_of_memory_failure()
|
|
|
1001 void ciEnv::record_out_of_memory_failure() {
|
|
|
1002 // If memory is low, we stop compiling methods.
|
|
|
1003 record_method_not_compilable("out of memory");
|
|
|
1004 }
|
