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1692
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1 /*
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2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 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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26 class SharkNativeWrapper : public SharkCompileInvariants {
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27 friend class SharkStackWithNativeFrame;
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28
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29 public:
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30 static SharkNativeWrapper* build(SharkBuilder* builder,
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31 methodHandle target,
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32 const char* name,
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33 BasicType* arg_types,
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34 BasicType return_type) {
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35 return new SharkNativeWrapper(builder,
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36 target,
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37 name,
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38 arg_types,
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39 return_type);
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40 }
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41
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42 private:
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43 SharkNativeWrapper(SharkBuilder* builder,
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44 methodHandle target,
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45 const char* name,
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46 BasicType* arg_types,
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47 BasicType return_type)
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48 : SharkCompileInvariants(NULL, builder),
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49 _target(target),
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50 _arg_types(arg_types),
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51 _return_type(return_type),
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52 _lock_slot_offset(0) { initialize(name); }
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53
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54 private:
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55 void initialize(const char* name);
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56
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57 private:
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58 methodHandle _target;
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59 BasicType* _arg_types;
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60 BasicType _return_type;
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61 llvm::Function* _function;
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62 SharkStack* _stack;
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63 llvm::Value* _oop_tmp_slot;
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64 OopMapSet* _oop_maps;
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65 int _receiver_slot_offset;
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66 int _lock_slot_offset;
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67
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68 // The method being compiled.
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69 protected:
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70 methodHandle target() const {
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71 return _target;
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72 }
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73
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74 // Properties of the method.
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75 protected:
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76 int arg_size() const {
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77 return target()->size_of_parameters();
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78 }
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79 BasicType arg_type(int i) const {
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80 return _arg_types[i];
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81 }
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82 BasicType return_type() const {
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83 return _return_type;
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84 }
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85 bool is_static() const {
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86 return target()->is_static();
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87 }
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88 bool is_synchronized() const {
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89 return target()->is_synchronized();
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90 }
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91 bool is_returning_oop() const {
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92 return target()->is_returning_oop();
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93 }
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94
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95 // The LLVM function we are building.
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96 public:
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97 llvm::Function* function() const {
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98 return _function;
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99 }
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100
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101 // The Zero stack and our frame on it.
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102 protected:
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103 SharkStack* stack() const {
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104 return _stack;
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105 }
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106
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107 // Temporary oop storage.
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108 protected:
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109 llvm::Value* oop_tmp_slot() const {
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110 assert(is_static() || is_returning_oop(), "should be");
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111 return _oop_tmp_slot;
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112 }
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113
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114 // Information required by nmethod::new_native_nmethod().
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115 public:
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116 int frame_size() const {
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117 return stack()->oopmap_frame_size();
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118 }
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119 ByteSize receiver_offset() const {
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120 return in_ByteSize(_receiver_slot_offset * wordSize);
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121 }
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122 ByteSize lock_offset() const {
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123 return in_ByteSize(_lock_slot_offset * wordSize);
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124 }
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125 OopMapSet* oop_maps() const {
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126 return _oop_maps;
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127 }
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128
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129 // Helpers.
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130 private:
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131 llvm::BasicBlock* CreateBlock(const char* name = "") const {
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132 return llvm::BasicBlock::Create(SharkContext::current(), name, function());
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133 }
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134 llvm::Value* thread_state_address() const {
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135 return builder()->CreateAddressOfStructEntry(
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136 thread(), JavaThread::thread_state_offset(),
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137 llvm::PointerType::getUnqual(SharkType::jint_type()),
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138 "thread_state_address");
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139 }
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140 llvm::Value* pending_exception_address() const {
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141 return builder()->CreateAddressOfStructEntry(
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142 thread(), Thread::pending_exception_offset(),
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143 llvm::PointerType::getUnqual(SharkType::oop_type()),
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144 "pending_exception_address");
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145 }
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146 void CreateSetThreadState(JavaThreadState state) const {
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147 builder()->CreateStore(
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148 LLVMValue::jint_constant(state), thread_state_address());
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149 }
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150 void CreateWriteMemorySerializePage() const {
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151 builder()->CreateStore(
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152 LLVMValue::jint_constant(1),
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153 builder()->CreateIntToPtr(
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154 builder()->CreateAdd(
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155 LLVMValue::intptr_constant(
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156 (intptr_t) os::get_memory_serialize_page()),
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157 builder()->CreateAnd(
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158 builder()->CreateLShr(
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159 builder()->CreatePtrToInt(thread(), SharkType::intptr_type()),
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160 LLVMValue::intptr_constant(os::get_serialize_page_shift_count())),
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161 LLVMValue::intptr_constant(os::get_serialize_page_mask()))),
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162 llvm::PointerType::getUnqual(SharkType::jint_type())));
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163 }
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164 void CreateResetHandleBlock() const {
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165 llvm::Value *active_handles = builder()->CreateValueOfStructEntry(
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166 thread(),
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167 JavaThread::active_handles_offset(),
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168 SharkType::jniHandleBlock_type(),
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169 "active_handles");
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170 builder()->CreateStore(
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171 LLVMValue::intptr_constant(0),
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172 builder()->CreateAddressOfStructEntry(
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173 active_handles,
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174 in_ByteSize(JNIHandleBlock::top_offset_in_bytes()),
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175 llvm::PointerType::getUnqual(SharkType::intptr_type()),
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176 "top"));
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177 }
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178 llvm::LoadInst* CreateLoadPendingException() const {
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179 return builder()->CreateLoad(
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180 pending_exception_address(), "pending_exception");
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181 }
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182 };
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