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1692
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1 /*
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1972
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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1692
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3 * Copyright 2008, 2009 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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1972
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26 #ifndef SHARE_VM_SHARK_SHARKINVARIANTS_HPP
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27 #define SHARE_VM_SHARK_SHARKINVARIANTS_HPP
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28
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29 #include "ci/ciEnv.hpp"
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30 #include "ci/ciInstanceKlass.hpp"
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31 #include "ci/ciMethod.hpp"
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32 #include "ci/ciTypeFlow.hpp"
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33 #include "code/debugInfoRec.hpp"
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34 #include "code/dependencies.hpp"
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35 #include "memory/allocation.hpp"
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36 #include "shark/llvmHeaders.hpp"
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37 #include "shark/sharkBuilder.hpp"
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38
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1692
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39 // Base classes used to track various values through the compilation.
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40 // SharkCompileInvariants is used to track values which remain the
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41 // same for the top-level method and any inlined methods it may have
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42 // (ie for the whole compilation). SharkTargetInvariants is used to
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43 // track values which differ between methods.
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44
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45 class SharkCompileInvariants : public ResourceObj {
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46 protected:
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47 SharkCompileInvariants(ciEnv* env, SharkBuilder* builder)
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48 : _env(env),
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49 _builder(builder),
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50 _thread(NULL) {}
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51
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52 SharkCompileInvariants(const SharkCompileInvariants* parent)
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53 : _env(parent->_env),
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54 _builder(parent->_builder),
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55 _thread(parent->_thread) {}
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56
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57 private:
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58 ciEnv* _env;
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59 SharkBuilder* _builder;
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60 llvm::Value* _thread;
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61
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62 // Top-level broker for HotSpot's Compiler Interface.
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63 //
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64 // Its main purpose is to allow the various CI classes to access
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65 // oops in the VM without having to worry about safepointing. In
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66 // addition to this it acts as a holder for various recorders and
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67 // memory allocators.
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68 //
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69 // Accessing this directly is kind of ugly, so it's private. Add
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70 // new accessors below if you need something from it.
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71 private:
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72 ciEnv* env() const {
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73 assert(_env != NULL, "env not available");
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74 return _env;
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75 }
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76
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77 // The SharkBuilder that is used to build LLVM IR.
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78 protected:
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79 SharkBuilder* builder() const {
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80 return _builder;
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81 }
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82
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83 // Pointer to this thread's JavaThread object. This is not
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84 // available until a short way into SharkFunction creation
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85 // so a setter is required. Assertions are used to enforce
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86 // invariance.
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87 protected:
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88 llvm::Value* thread() const {
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89 assert(_thread != NULL, "thread not available");
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90 return _thread;
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91 }
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92 void set_thread(llvm::Value* thread) {
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93 assert(_thread == NULL, "thread already set");
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94 _thread = thread;
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95 }
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96
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97 // Objects that handle various aspects of the compilation.
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98 protected:
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99 DebugInformationRecorder* debug_info() const {
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100 return env()->debug_info();
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101 }
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102 Dependencies* dependencies() const {
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103 return env()->dependencies();
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104 }
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105 SharkCodeBuffer* code_buffer() const {
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106 return builder()->code_buffer();
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107 }
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108
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109 // Commonly used classes
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110 protected:
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111 ciInstanceKlass* java_lang_Object_klass() const {
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112 return env()->Object_klass();
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113 }
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114 ciInstanceKlass* java_lang_Throwable_klass() const {
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115 return env()->Throwable_klass();
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116 }
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117 };
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118
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119 class SharkTargetInvariants : public SharkCompileInvariants {
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120 protected:
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121 SharkTargetInvariants(ciEnv* env, SharkBuilder* builder, ciTypeFlow* flow)
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122 : SharkCompileInvariants(env, builder),
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123 _target(flow->method()),
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124 _flow(flow),
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125 _max_monitors(count_monitors()) {}
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126
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127 SharkTargetInvariants(const SharkCompileInvariants* parent, ciMethod* target)
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128 : SharkCompileInvariants(parent),
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129 _target(target),
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130 _flow(NULL),
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131 _max_monitors(count_monitors()) {}
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132
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133 SharkTargetInvariants(const SharkTargetInvariants* parent)
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134 : SharkCompileInvariants(parent),
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135 _target(parent->_target),
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136 _flow(parent->_flow),
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137 _max_monitors(parent->_max_monitors) {}
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138
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139 private:
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140 int count_monitors();
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141
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142 private:
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143 ciMethod* _target;
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144 ciTypeFlow* _flow;
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145 int _max_monitors;
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146
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147 // The method being compiled.
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148 protected:
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149 ciMethod* target() const {
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150 return _target;
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151 }
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152
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153 // Typeflow analysis of the method being compiled.
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154 protected:
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155 ciTypeFlow* flow() const {
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156 assert(_flow != NULL, "typeflow not available");
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157 return _flow;
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158 }
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159
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160 // Properties of the method.
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161 protected:
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162 int max_locals() const {
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163 return target()->max_locals();
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164 }
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165 int max_stack() const {
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166 return target()->max_stack();
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167 }
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168 int max_monitors() const {
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169 return _max_monitors;
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170 }
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171 int arg_size() const {
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172 return target()->arg_size();
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173 }
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174 bool is_static() const {
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175 return target()->is_static();
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176 }
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177 bool is_synchronized() const {
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178 return target()->is_synchronized();
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179 }
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180 };
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1972
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181
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182 #endif // SHARE_VM_SHARK_SHARKINVARIANTS_HPP
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