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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 2008, 2009, 2010 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 SharkFunction;
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27 class SharkNativeWrapper;
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28 class SharkStackWithNormalFrame;
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29 class SharkStackWithNativeFrame;
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30
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31 class SharkStack : public SharkCompileInvariants {
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32 public:
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33 static SharkStack* CreateBuildAndPushFrame(
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34 SharkFunction* function, llvm::Value* method);
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35 static SharkStack* CreateBuildAndPushFrame(
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36 SharkNativeWrapper* wrapper, llvm::Value* method);
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37
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38 protected:
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39 SharkStack(const SharkCompileInvariants* parent)
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40 : SharkCompileInvariants(parent) {}
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41
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42 protected:
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43 void initialize(llvm::Value* method);
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44
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45 protected:
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46 void CreateStackOverflowCheck(llvm::Value* sp);
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47
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48 // Properties of the method being compiled
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49 protected:
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50 virtual int arg_size() const = 0;
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51 virtual int max_locals() const = 0;
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52 virtual int max_stack() const = 0;
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53 virtual int max_monitors() const = 0;
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54
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55 // BasicBlock creation
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56 protected:
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57 virtual llvm::BasicBlock* CreateBlock(const char* name = "") const = 0;
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58
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59 // Interpreter entry point for bailouts
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60 protected:
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61 virtual address interpreter_entry_point() const = 0;
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62
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63 // Interface with the Zero stack
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64 private:
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65 llvm::Value* zero_stack() const {
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66 return builder()->CreateAddressOfStructEntry(
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67 thread(),
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68 JavaThread::zero_stack_offset(),
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69 SharkType::zeroStack_type(),
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70 "zero_stack");
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71 }
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72 llvm::Value* stack_base() const {
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73 return builder()->CreateValueOfStructEntry(
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74 zero_stack(),
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75 ZeroStack::base_offset(),
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76 SharkType::intptr_type(),
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77 "stack_base");
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78 }
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79 llvm::Value* stack_pointer_addr() const {
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80 return builder()->CreateAddressOfStructEntry(
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81 zero_stack(),
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82 ZeroStack::sp_offset(),
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83 llvm::PointerType::getUnqual(SharkType::intptr_type()),
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84 "stack_pointer_addr");
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85 }
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86 llvm::Value* frame_pointer_addr() const {
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87 return builder()->CreateAddressOfStructEntry(
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88 thread(),
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89 JavaThread::top_zero_frame_offset(),
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90 llvm::PointerType::getUnqual(SharkType::intptr_type()),
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91 "frame_pointer_addr");
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92 }
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93
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94 public:
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95 llvm::LoadInst* CreateLoadStackPointer(const char *name = "") {
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96 return builder()->CreateLoad(stack_pointer_addr(), name);
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97 }
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98 llvm::StoreInst* CreateStoreStackPointer(llvm::Value* value) {
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99 return builder()->CreateStore(value, stack_pointer_addr());
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100 }
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101 llvm::LoadInst* CreateLoadFramePointer(const char *name = "") {
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102 return builder()->CreateLoad(frame_pointer_addr(), name);
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103 }
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104 llvm::StoreInst* CreateStoreFramePointer(llvm::Value* value) {
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105 return builder()->CreateStore(value, frame_pointer_addr());
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106 }
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107 llvm::Value* CreatePopFrame(int result_slots);
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108
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109 // Interface with the frame anchor
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110 private:
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111 llvm::Value* last_Java_sp_addr() const {
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112 return builder()->CreateAddressOfStructEntry(
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113 thread(),
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114 JavaThread::last_Java_sp_offset(),
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115 llvm::PointerType::getUnqual(SharkType::intptr_type()),
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116 "last_Java_sp_addr");
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117 }
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118 llvm::Value* last_Java_fp_addr() const {
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119 return builder()->CreateAddressOfStructEntry(
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120 thread(),
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121 JavaThread::last_Java_fp_offset(),
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122 llvm::PointerType::getUnqual(SharkType::intptr_type()),
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123 "last_Java_fp_addr");
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124 }
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125
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126 public:
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127 void CreateSetLastJavaFrame() {
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128 // Note that whenever _last_Java_sp != NULL other anchor fields
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129 // must be valid. The profiler apparently depends on this.
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130 NOT_PRODUCT(CreateAssertLastJavaSPIsNull());
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131 builder()->CreateStore(CreateLoadFramePointer(), last_Java_fp_addr());
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132 // XXX There's last_Java_pc as well, but I don't think anything uses it
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133 // Also XXX: should we fence here? Zero doesn't...
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134 builder()->CreateStore(CreateLoadStackPointer(), last_Java_sp_addr());
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135 // Also also XXX: we could probably cache the sp (and the fp we know??)
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136 }
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137 void CreateResetLastJavaFrame() {
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138 builder()->CreateStore(LLVMValue::intptr_constant(0), last_Java_sp_addr());
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139 }
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140
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141 private:
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142 void CreateAssertLastJavaSPIsNull() const PRODUCT_RETURN;
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143
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144 // Our method's frame
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145 private:
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146 llvm::Value* _frame;
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147 int _extended_frame_size;
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148 int _stack_slots_offset;
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149
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150 public:
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151 int extended_frame_size() const {
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152 return _extended_frame_size;
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153 }
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154 int oopmap_frame_size() const {
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155 return extended_frame_size() - arg_size();
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156 }
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157
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158 // Offsets of things in the frame
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159 private:
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160 int _monitors_slots_offset;
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161 int _oop_tmp_slot_offset;
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162 int _method_slot_offset;
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163 int _pc_slot_offset;
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164 int _locals_slots_offset;
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165
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166 public:
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167 int stack_slots_offset() const {
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168 return _stack_slots_offset;
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169 }
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170 int oop_tmp_slot_offset() const {
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171 return _oop_tmp_slot_offset;
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172 }
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173 int method_slot_offset() const {
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174 return _method_slot_offset;
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175 }
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176 int pc_slot_offset() const {
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177 return _pc_slot_offset;
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178 }
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179 int locals_slots_offset() const {
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180 return _locals_slots_offset;
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181 }
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182 int monitor_offset(int index) const {
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183 assert(index >= 0 && index < max_monitors(), "invalid monitor index");
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184 return _monitors_slots_offset +
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185 (max_monitors() - 1 - index) * frame::interpreter_frame_monitor_size();
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186 }
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187 int monitor_object_offset(int index) const {
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188 return monitor_offset(index) +
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189 (BasicObjectLock::obj_offset_in_bytes() >> LogBytesPerWord);
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190 }
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191 int monitor_header_offset(int index) const {
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192 return monitor_offset(index) +
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193 ((BasicObjectLock::lock_offset_in_bytes() +
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194 BasicLock::displaced_header_offset_in_bytes()) >> LogBytesPerWord);
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195 }
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196
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197 // Addresses of things in the frame
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198 public:
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199 llvm::Value* slot_addr(int offset,
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200 const llvm::Type* type = NULL,
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201 const char* name = "") const;
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202
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203 llvm::Value* monitor_addr(int index) const {
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204 return slot_addr(
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205 monitor_offset(index),
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206 SharkType::monitor_type(),
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207 "monitor");
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208 }
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209 llvm::Value* monitor_object_addr(int index) const {
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210 return slot_addr(
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211 monitor_object_offset(index),
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212 SharkType::oop_type(),
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213 "object_addr");
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214 }
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215 llvm::Value* monitor_header_addr(int index) const {
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216 return slot_addr(
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217 monitor_header_offset(index),
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218 SharkType::intptr_type(),
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219 "displaced_header_addr");
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220 }
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221
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222 // oopmap helpers
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223 public:
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224 static int oopmap_slot_munge(int offset) {
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225 return offset << (LogBytesPerWord - LogBytesPerInt);
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226 }
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227 static VMReg slot2reg(int offset) {
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228 return VMRegImpl::stack2reg(oopmap_slot_munge(offset));
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229 }
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230 };
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231
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232 class SharkStackWithNormalFrame : public SharkStack {
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233 friend class SharkStack;
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234
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235 protected:
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236 SharkStackWithNormalFrame(SharkFunction* function, llvm::Value* method);
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237
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238 private:
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239 SharkFunction* _function;
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240
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241 private:
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242 SharkFunction* function() const {
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243 return _function;
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244 }
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245
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246 // Properties of the method being compiled
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247 private:
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248 int arg_size() const;
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249 int max_locals() const;
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250 int max_stack() const;
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251 int max_monitors() const;
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252
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253 // BasicBlock creation
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254 private:
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255 llvm::BasicBlock* CreateBlock(const char* name = "") const;
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256
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257 // Interpreter entry point for bailouts
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258 private:
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259 address interpreter_entry_point() const;
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260 };
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261
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262 class SharkStackWithNativeFrame : public SharkStack {
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263 friend class SharkStack;
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264
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265 protected:
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266 SharkStackWithNativeFrame(SharkNativeWrapper* wrapper, llvm::Value* method);
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267
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268 private:
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269 SharkNativeWrapper* _wrapper;
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270
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271 private:
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272 SharkNativeWrapper* wrapper() const {
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273 return _wrapper;
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274 }
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275
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276 // Properties of the method being compiled
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277 private:
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278 int arg_size() const;
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279 int max_locals() const;
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280 int max_stack() const;
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281 int max_monitors() const;
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282
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283 // BasicBlock creation
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284 private:
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285 llvm::BasicBlock* CreateBlock(const char* name = "") const;
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286
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287 // Interpreter entry point for bailouts
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288 private:
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289 address interpreter_entry_point() const;
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290 };
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