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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, 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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1972
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26 #include "precompiled.hpp"
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27 #include "ci/ciMethod.hpp"
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28 #include "memory/resourceArea.hpp"
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29 #include "oops/methodOop.hpp"
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30 #include "runtime/os.hpp"
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31 #include "runtime/synchronizer.hpp"
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32 #include "runtime/thread.hpp"
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33 #include "shark/llvmHeaders.hpp"
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34 #include "shark/llvmValue.hpp"
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35 #include "shark/sharkBuilder.hpp"
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36 #include "shark/sharkContext.hpp"
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37 #include "shark/sharkRuntime.hpp"
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38 #include "utilities/debug.hpp"
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1692
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39
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40 using namespace llvm;
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41
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42 SharkBuilder::SharkBuilder(SharkCodeBuffer* code_buffer)
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43 : IRBuilder<>(SharkContext::current()),
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44 _code_buffer(code_buffer) {
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45 }
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46
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47 // Helpers for accessing structures
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48 Value* SharkBuilder::CreateAddressOfStructEntry(Value* base,
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49 ByteSize offset,
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50 const Type* type,
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51 const char* name) {
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52 return CreateBitCast(CreateStructGEP(base, in_bytes(offset)), type, name);
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53 }
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54
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55 LoadInst* SharkBuilder::CreateValueOfStructEntry(Value* base,
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56 ByteSize offset,
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57 const Type* type,
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58 const char* name) {
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59 return CreateLoad(
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60 CreateAddressOfStructEntry(
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61 base, offset, PointerType::getUnqual(type)),
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62 name);
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63 }
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64
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65 // Helpers for accessing arrays
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66
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67 LoadInst* SharkBuilder::CreateArrayLength(Value* arrayoop) {
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68 return CreateValueOfStructEntry(
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69 arrayoop, in_ByteSize(arrayOopDesc::length_offset_in_bytes()),
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70 SharkType::jint_type(), "length");
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71 }
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72
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73 Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
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74 const Type* element_type,
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75 int element_bytes,
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76 ByteSize base_offset,
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77 Value* index,
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78 const char* name) {
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79 Value* offset = CreateIntCast(index, SharkType::intptr_type(), false);
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80 if (element_bytes != 1)
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81 offset = CreateShl(
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82 offset,
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83 LLVMValue::intptr_constant(exact_log2(element_bytes)));
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84 offset = CreateAdd(
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85 LLVMValue::intptr_constant(in_bytes(base_offset)), offset);
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86
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87 return CreateIntToPtr(
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88 CreateAdd(CreatePtrToInt(arrayoop, SharkType::intptr_type()), offset),
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89 PointerType::getUnqual(element_type),
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90 name);
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91 }
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92
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93 Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
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94 BasicType basic_type,
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95 ByteSize base_offset,
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96 Value* index,
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97 const char* name) {
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98 return CreateArrayAddress(
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99 arrayoop,
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100 SharkType::to_arrayType(basic_type),
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101 type2aelembytes(basic_type),
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102 base_offset, index, name);
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103 }
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104
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105 Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
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106 BasicType basic_type,
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107 Value* index,
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108 const char* name) {
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109 return CreateArrayAddress(
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110 arrayoop, basic_type,
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111 in_ByteSize(arrayOopDesc::base_offset_in_bytes(basic_type)),
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112 index, name);
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113 }
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114
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115 // Helpers for creating intrinsics and external functions.
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116
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117 const Type* SharkBuilder::make_type(char type, bool void_ok) {
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118 switch (type) {
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119 // Primitive types
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120 case 'c':
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121 return SharkType::jbyte_type();
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122 case 'i':
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123 return SharkType::jint_type();
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124 case 'l':
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125 return SharkType::jlong_type();
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126 case 'x':
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127 return SharkType::intptr_type();
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128 case 'f':
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129 return SharkType::jfloat_type();
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130 case 'd':
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131 return SharkType::jdouble_type();
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132
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133 // Pointers to primitive types
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134 case 'C':
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135 case 'I':
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136 case 'L':
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137 case 'X':
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138 case 'F':
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139 case 'D':
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140 return PointerType::getUnqual(make_type(tolower(type), false));
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141
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142 // VM objects
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143 case 'T':
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144 return SharkType::thread_type();
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145 case 'M':
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146 return PointerType::getUnqual(SharkType::monitor_type());
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147 case 'O':
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148 return SharkType::oop_type();
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149
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150 // Miscellaneous
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151 case 'v':
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152 assert(void_ok, "should be");
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153 return SharkType::void_type();
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154 case '1':
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155 return SharkType::bit_type();
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156
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157 default:
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158 ShouldNotReachHere();
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159 }
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160 }
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161
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162 const FunctionType* SharkBuilder::make_ftype(const char* params,
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163 const char* ret) {
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164 std::vector<const Type*> param_types;
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165 for (const char* c = params; *c; c++)
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166 param_types.push_back(make_type(*c, false));
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167
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168 assert(strlen(ret) == 1, "should be");
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169 const Type *return_type = make_type(*ret, true);
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170
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171 return FunctionType::get(return_type, param_types, false);
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172 }
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173
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174 // Create an object representing an intrinsic or external function by
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175 // referencing the symbol by name. This is the LLVM-style approach,
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176 // but it cannot be used on functions within libjvm.so its symbols
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177 // are not exported. Note that you cannot make this work simply by
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178 // exporting the symbols, as some symbols have the same names as
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179 // symbols in the standard libraries (eg, atan2, fabs) and would
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180 // obscure them were they visible.
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181 Value* SharkBuilder::make_function(const char* name,
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182 const char* params,
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183 const char* ret) {
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184 return SharkContext::current().get_external(name, make_ftype(params, ret));
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185 }
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186
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187 // Create an object representing an external function by inlining a
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188 // function pointer in the code. This is not the LLVM way, but it's
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189 // the only way to access functions in libjvm.so and functions like
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190 // __kernel_dmb on ARM which is accessed via an absolute address.
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191 Value* SharkBuilder::make_function(address func,
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192 const char* params,
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193 const char* ret) {
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194 return CreateIntToPtr(
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195 LLVMValue::intptr_constant((intptr_t) func),
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196 PointerType::getUnqual(make_ftype(params, ret)));
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197 }
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198
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199 // VM calls
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200
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201 Value* SharkBuilder::find_exception_handler() {
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202 return make_function(
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203 (address) SharkRuntime::find_exception_handler, "TIi", "i");
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204 }
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205
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206 Value* SharkBuilder::monitorenter() {
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207 return make_function((address) SharkRuntime::monitorenter, "TM", "v");
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208 }
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209
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210 Value* SharkBuilder::monitorexit() {
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211 return make_function((address) SharkRuntime::monitorexit, "TM", "v");
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212 }
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213
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214 Value* SharkBuilder::new_instance() {
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215 return make_function((address) SharkRuntime::new_instance, "Ti", "v");
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216 }
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217
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218 Value* SharkBuilder::newarray() {
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219 return make_function((address) SharkRuntime::newarray, "Tii", "v");
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220 }
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221
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222 Value* SharkBuilder::anewarray() {
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223 return make_function((address) SharkRuntime::anewarray, "Tii", "v");
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224 }
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225
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226 Value* SharkBuilder::multianewarray() {
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227 return make_function((address) SharkRuntime::multianewarray, "TiiI", "v");
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228 }
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229
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230 Value* SharkBuilder::register_finalizer() {
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231 return make_function((address) SharkRuntime::register_finalizer, "TO", "v");
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232 }
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233
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234 Value* SharkBuilder::safepoint() {
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235 return make_function((address) SafepointSynchronize::block, "T", "v");
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236 }
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237
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238 Value* SharkBuilder::throw_ArithmeticException() {
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239 return make_function(
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240 (address) SharkRuntime::throw_ArithmeticException, "TCi", "v");
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241 }
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242
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243 Value* SharkBuilder::throw_ArrayIndexOutOfBoundsException() {
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244 return make_function(
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245 (address) SharkRuntime::throw_ArrayIndexOutOfBoundsException, "TCii", "v");
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246 }
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247
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248 Value* SharkBuilder::throw_ClassCastException() {
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249 return make_function(
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250 (address) SharkRuntime::throw_ClassCastException, "TCi", "v");
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251 }
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252
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253 Value* SharkBuilder::throw_NullPointerException() {
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254 return make_function(
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255 (address) SharkRuntime::throw_NullPointerException, "TCi", "v");
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256 }
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257
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258 // High-level non-VM calls
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259
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260 Value* SharkBuilder::f2i() {
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261 return make_function((address) SharedRuntime::f2i, "f", "i");
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262 }
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263
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264 Value* SharkBuilder::f2l() {
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265 return make_function((address) SharedRuntime::f2l, "f", "l");
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266 }
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267
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268 Value* SharkBuilder::d2i() {
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269 return make_function((address) SharedRuntime::d2i, "d", "i");
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270 }
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271
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272 Value* SharkBuilder::d2l() {
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273 return make_function((address) SharedRuntime::d2l, "d", "l");
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274 }
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275
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276 Value* SharkBuilder::is_subtype_of() {
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277 return make_function((address) SharkRuntime::is_subtype_of, "OO", "c");
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278 }
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279
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280 Value* SharkBuilder::current_time_millis() {
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281 return make_function((address) os::javaTimeMillis, "", "l");
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282 }
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283
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284 Value* SharkBuilder::sin() {
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285 return make_function("llvm.sin.f64", "d", "d");
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286 }
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287
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288 Value* SharkBuilder::cos() {
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289 return make_function("llvm.cos.f64", "d", "d");
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290 }
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291
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292 Value* SharkBuilder::tan() {
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293 return make_function((address) ::tan, "d", "d");
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294 }
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295
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296 Value* SharkBuilder::atan2() {
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297 return make_function((address) ::atan2, "dd", "d");
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298 }
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299
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300 Value* SharkBuilder::sqrt() {
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301 return make_function("llvm.sqrt.f64", "d", "d");
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302 }
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303
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304 Value* SharkBuilder::log() {
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305 return make_function("llvm.log.f64", "d", "d");
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306 }
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307
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308 Value* SharkBuilder::log10() {
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309 return make_function("llvm.log10.f64", "d", "d");
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310 }
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311
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312 Value* SharkBuilder::pow() {
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313 return make_function("llvm.pow.f64", "dd", "d");
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314 }
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315
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316 Value* SharkBuilder::exp() {
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317 return make_function("llvm.exp.f64", "d", "d");
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318 }
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319
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320 Value* SharkBuilder::fabs() {
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321 return make_function((address) ::fabs, "d", "d");
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322 }
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323
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324 Value* SharkBuilder::unsafe_field_offset_to_byte_offset() {
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325 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset);
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326 return make_function((address) Unsafe_field_offset_to_byte_offset, "l", "l");
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327 }
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328
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329 Value* SharkBuilder::osr_migration_end() {
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330 return make_function((address) SharedRuntime::OSR_migration_end, "C", "v");
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331 }
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332
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333 // Semi-VM calls
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334
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335 Value* SharkBuilder::throw_StackOverflowError() {
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336 return make_function((address) ZeroStack::handle_overflow, "T", "v");
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337 }
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338
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339 Value* SharkBuilder::uncommon_trap() {
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340 return make_function((address) SharkRuntime::uncommon_trap, "Ti", "i");
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341 }
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342
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343 Value* SharkBuilder::deoptimized_entry_point() {
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344 return make_function((address) CppInterpreter::main_loop, "iT", "v");
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345 }
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346
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347 // Native-Java transition
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348
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349 Value* SharkBuilder::check_special_condition_for_native_trans() {
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350 return make_function(
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351 (address) JavaThread::check_special_condition_for_native_trans,
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352 "T", "v");
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353 }
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354
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355 // Low-level non-VM calls
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356
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357 // The ARM-specific code here is to work around unimplemented
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358 // atomic exchange and memory barrier intrinsics in LLVM.
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359 //
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360 // Delegating to external functions for these would normally
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361 // incur a speed penalty, but Linux on ARM is a special case
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362 // in that atomic operations on that platform are handled by
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363 // external functions anyway. It would be *preferable* for
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364 // the calls to be hidden away in LLVM, but it's not hurting
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365 // performance so having the calls here is acceptable.
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366 //
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367 // If you are building Shark on a platform without atomic
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368 // exchange and/or memory barrier intrinsics then it is only
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369 // acceptable to mimic this approach if your platform cannot
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370 // perform these operations without delegating to a function.
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371
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372 #ifdef ARM
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373 static jint zero_cmpxchg_int(volatile jint *ptr, jint oldval, jint newval) {
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374 return Atomic::cmpxchg(newval, ptr, oldval);
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375 }
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376 #endif // ARM
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377
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378 Value* SharkBuilder::cmpxchg_int() {
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379 return make_function(
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380 #ifdef ARM
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381 (address) zero_cmpxchg_int,
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382 #else
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383 "llvm.atomic.cmp.swap.i32.p0i32",
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384 #endif // ARM
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385 "Iii", "i");
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386 }
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387
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388 #ifdef ARM
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389 static intptr_t zero_cmpxchg_ptr(volatile intptr_t* ptr,
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390 intptr_t oldval,
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391 intptr_t newval) {
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392 return Atomic::cmpxchg_ptr(newval, ptr, oldval);
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393 }
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394 #endif // ARM
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395
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396 Value* SharkBuilder::cmpxchg_ptr() {
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397 return make_function(
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398 #ifdef ARM
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399 (address) zero_cmpxchg_ptr,
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400 #else
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401 "llvm.atomic.cmp.swap.i" LP64_ONLY("64") NOT_LP64("32") ".p0i" LP64_ONLY("64") NOT_LP64("32"),
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402 #endif // ARM
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403 "Xxx", "x");
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404 }
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405
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406 Value* SharkBuilder::frame_address() {
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407 return make_function("llvm.frameaddress", "i", "C");
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408 }
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409
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410 Value* SharkBuilder::memory_barrier() {
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411 return make_function(
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412 #ifdef ARM
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413 (address) 0xffff0fa0, // __kernel_dmb
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414 #else
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415 "llvm.memory.barrier",
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416 #endif // ARM
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417 "11111", "v");
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418 }
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419
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420 Value* SharkBuilder::memset() {
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421 #if SHARK_LLVM_VERSION >= 28
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422 // LLVM 2.8 added a fifth isVolatile field for memset
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423 // introduced with LLVM r100304
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424 return make_function("llvm.memset.i32", "Cciii", "v");
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425 #else
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426 return make_function("llvm.memset.i32", "Ccii", "v");
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427 #endif
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428 }
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429
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430 Value* SharkBuilder::unimplemented() {
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431 return make_function((address) report_unimplemented, "Ci", "v");
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432 }
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433
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434 Value* SharkBuilder::should_not_reach_here() {
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435 return make_function((address) report_should_not_reach_here, "Ci", "v");
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436 }
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437
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438 Value* SharkBuilder::dump() {
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439 return make_function((address) SharkRuntime::dump, "Cx", "v");
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440 }
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441
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442 // Public interface to low-level non-VM calls
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443
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444 CallInst* SharkBuilder::CreateCmpxchgInt(Value* exchange_value,
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445 Value* dst,
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446 Value* compare_value) {
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447 return CreateCall3(cmpxchg_int(), dst, compare_value, exchange_value);
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448 }
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449
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450 CallInst* SharkBuilder::CreateCmpxchgPtr(Value* exchange_value,
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451 Value* dst,
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452 Value* compare_value) {
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453 return CreateCall3(cmpxchg_ptr(), dst, compare_value, exchange_value);
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454 }
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455
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456 CallInst* SharkBuilder::CreateGetFrameAddress() {
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457 return CreateCall(frame_address(), LLVMValue::jint_constant(0));
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458 }
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459
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460 CallInst *SharkBuilder::CreateMemoryBarrier(int flags) {
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461 Value *args[] = {
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462 LLVMValue::bit_constant((flags & BARRIER_LOADLOAD) ? 1 : 0),
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463 LLVMValue::bit_constant((flags & BARRIER_LOADSTORE) ? 1 : 0),
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464 LLVMValue::bit_constant((flags & BARRIER_STORELOAD) ? 1 : 0),
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465 LLVMValue::bit_constant((flags & BARRIER_STORESTORE) ? 1 : 0),
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466 LLVMValue::bit_constant(1)};
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467
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468 return CreateCall(memory_barrier(), args, args + 5);
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469 }
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|
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470
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|
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471 CallInst* SharkBuilder::CreateMemset(Value* dst,
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472 Value* value,
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|
473 Value* len,
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|
474 Value* align) {
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|
|
475 #if SHARK_LLVM_VERSION >= 28
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|
476 return CreateCall5(memset(), dst, value, len, align,
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|
|
477 LLVMValue::jint_constant(0));
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|
|
478 #else
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|
|
479 return CreateCall4(memset(), dst, value, len, align);
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|
|
480 #endif
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|
|
481 }
|
|
|
482
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|
|
483 CallInst* SharkBuilder::CreateUnimplemented(const char* file, int line) {
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|
|
484 return CreateCall2(
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|
485 unimplemented(),
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|
|
486 CreateIntToPtr(
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|
|
487 LLVMValue::intptr_constant((intptr_t) file),
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|
|
488 PointerType::getUnqual(SharkType::jbyte_type())),
|
|
|
489 LLVMValue::jint_constant(line));
|
|
|
490 }
|
|
|
491
|
|
|
492 CallInst* SharkBuilder::CreateShouldNotReachHere(const char* file, int line) {
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|
|
493 return CreateCall2(
|
|
|
494 should_not_reach_here(),
|
|
|
495 CreateIntToPtr(
|
|
|
496 LLVMValue::intptr_constant((intptr_t) file),
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|
|
497 PointerType::getUnqual(SharkType::jbyte_type())),
|
|
|
498 LLVMValue::jint_constant(line));
|
|
|
499 }
|
|
|
500
|
|
|
501 #ifndef PRODUCT
|
|
|
502 CallInst* SharkBuilder::CreateDump(Value* value) {
|
|
|
503 const char *name;
|
|
|
504 if (value->hasName())
|
|
|
505 // XXX this leaks, but it's only debug code
|
|
|
506 name = strdup(value->getName().str().c_str());
|
|
|
507 else
|
|
|
508 name = "unnamed_value";
|
|
|
509
|
|
|
510 if (isa<PointerType>(value->getType()))
|
|
|
511 value = CreatePtrToInt(value, SharkType::intptr_type());
|
|
|
512 else if (value->getType()->
|
|
|
513 #if SHARK_LLVM_VERSION >= 27
|
|
|
514 isIntegerTy()
|
|
|
515 #else
|
|
|
516 isInteger()
|
|
|
517 #endif
|
|
|
518 )
|
|
|
519 value = CreateIntCast(value, SharkType::intptr_type(), false);
|
|
|
520 else
|
|
|
521 Unimplemented();
|
|
|
522
|
|
|
523 return CreateCall2(
|
|
|
524 dump(),
|
|
|
525 CreateIntToPtr(
|
|
|
526 LLVMValue::intptr_constant((intptr_t) name),
|
|
|
527 PointerType::getUnqual(SharkType::jbyte_type())),
|
|
|
528 value);
|
|
|
529 }
|
|
|
530 #endif // PRODUCT
|
|
|
531
|
|
|
532 // HotSpot memory barriers
|
|
|
533
|
|
|
534 void SharkBuilder::CreateUpdateBarrierSet(BarrierSet* bs, Value* field) {
|
|
|
535 if (bs->kind() != BarrierSet::CardTableModRef)
|
|
|
536 Unimplemented();
|
|
|
537
|
|
|
538 CreateStore(
|
|
|
539 LLVMValue::jbyte_constant(CardTableModRefBS::dirty_card),
|
|
|
540 CreateIntToPtr(
|
|
|
541 CreateAdd(
|
|
|
542 LLVMValue::intptr_constant(
|
|
|
543 (intptr_t) ((CardTableModRefBS *) bs)->byte_map_base),
|
|
|
544 CreateLShr(
|
|
|
545 CreatePtrToInt(field, SharkType::intptr_type()),
|
|
|
546 LLVMValue::intptr_constant(CardTableModRefBS::card_shift))),
|
|
|
547 PointerType::getUnqual(SharkType::jbyte_type())));
|
|
|
548 }
|
|
|
549
|
|
|
550 // Helpers for accessing the code buffer
|
|
|
551
|
|
|
552 Value* SharkBuilder::code_buffer_address(int offset) {
|
|
|
553 return CreateAdd(
|
|
|
554 code_buffer()->base_pc(),
|
|
|
555 LLVMValue::intptr_constant(offset));
|
|
|
556 }
|
|
|
557
|
|
|
558 Value* SharkBuilder::CreateInlineOop(jobject object, const char* name) {
|
|
|
559 return CreateLoad(
|
|
|
560 CreateIntToPtr(
|
|
|
561 code_buffer_address(code_buffer()->inline_oop(object)),
|
|
|
562 PointerType::getUnqual(SharkType::oop_type())),
|
|
|
563 name);
|
|
|
564 }
|
|
|
565
|
|
|
566 Value* SharkBuilder::CreateInlineData(void* data,
|
|
|
567 size_t size,
|
|
|
568 const Type* type,
|
|
|
569 const char* name) {
|
|
|
570 return CreateIntToPtr(
|
|
|
571 code_buffer_address(code_buffer()->inline_data(data, size)),
|
|
|
572 type,
|
|
|
573 name);
|
|
|
574 }
|
|
|
575
|
|
|
576 // Helpers for creating basic blocks.
|
|
|
577
|
|
|
578 BasicBlock* SharkBuilder::GetBlockInsertionPoint() const {
|
|
|
579 BasicBlock *cur = GetInsertBlock();
|
|
|
580
|
|
|
581 // BasicBlock::Create takes an insertBefore argument, so
|
|
|
582 // we need to find the block _after_ the current block
|
|
|
583 Function::iterator iter = cur->getParent()->begin();
|
|
|
584 Function::iterator end = cur->getParent()->end();
|
|
|
585 while (iter != end) {
|
|
|
586 iter++;
|
|
|
587 if (&*iter == cur) {
|
|
|
588 iter++;
|
|
|
589 break;
|
|
|
590 }
|
|
|
591 }
|
|
|
592
|
|
|
593 if (iter == end)
|
|
|
594 return NULL;
|
|
|
595 else
|
|
|
596 return iter;
|
|
|
597 }
|
|
|
598
|
|
|
599 BasicBlock* SharkBuilder::CreateBlock(BasicBlock* ip, const char* name) const {
|
|
|
600 return BasicBlock::Create(
|
|
|
601 SharkContext::current(), name, GetInsertBlock()->getParent(), ip);
|
|
|
602 }
|
