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annotate src/share/vm/prims/methodHandleWalk.hpp @ 1972:f95d63e2154a

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6989984: Use standard include model for Hospot Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
author stefank
date Tue, 23 Nov 2010 13:22:55 -0800
parents c18cbe5936b8
children f2da85a9b08e
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1 /*
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2 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_PRIMS_METHODHANDLEWALK_HPP
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26 #define SHARE_VM_PRIMS_METHODHANDLEWALK_HPP
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27
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28 #include "prims/methodHandles.hpp"
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29
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30 // Low-level parser for method handle chains.
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31 class MethodHandleChain : StackObj {
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32 public:
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33 typedef MethodHandles::EntryKind EntryKind;
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34
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35 private:
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36 Handle _root; // original target
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37 Handle _method_handle; // current target
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38 bool _is_last; // final guy in chain
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39 bool _is_bound; // has a bound argument
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40 BasicType _arg_type; // if is_bound, the bound argument type
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41 int _arg_slot; // if is_bound or is_adapter, affected argument slot
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42 jint _conversion; // conversion field of AMH or -1
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43 methodHandle _last_method; // if is_last, which method we target
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44 Bytecodes::Code _last_invoke; // if is_last, type of invoke
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45 const char* _lose_message; // saved argument to lose()
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46
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47 void set_method_handle(Handle target, TRAPS);
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48 void set_last_method(oop target, TRAPS);
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49 static BasicType compute_bound_arg_type(oop target, methodOop m, int arg_slot, TRAPS);
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50
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51 oop MethodHandle_type_oop() { return java_dyn_MethodHandle::type(method_handle_oop()); }
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52 oop MethodHandle_vmtarget_oop() { return java_dyn_MethodHandle::vmtarget(method_handle_oop()); }
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53 int MethodHandle_vmslots() { return java_dyn_MethodHandle::vmslots(method_handle_oop()); }
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54 int DirectMethodHandle_vmindex() { return sun_dyn_DirectMethodHandle::vmindex(method_handle_oop()); }
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55 oop BoundMethodHandle_argument_oop() { return sun_dyn_BoundMethodHandle::argument(method_handle_oop()); }
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56 int BoundMethodHandle_vmargslot() { return sun_dyn_BoundMethodHandle::vmargslot(method_handle_oop()); }
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57 int AdapterMethodHandle_conversion() { return sun_dyn_AdapterMethodHandle::conversion(method_handle_oop()); }
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58
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59 public:
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60 MethodHandleChain(Handle root, TRAPS)
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61 : _root(root)
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62 { set_method_handle(root, THREAD); }
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63
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64 bool is_adapter() { return _conversion != -1; }
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65 bool is_bound() { return _is_bound; }
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66 bool is_last() { return _is_last; }
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67
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68 void next(TRAPS) {
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69 assert(!is_last(), "");
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70 set_method_handle(MethodHandle_vmtarget_oop(), THREAD);
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71 }
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72
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73 Handle method_handle() { return _method_handle; }
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74 oop method_handle_oop() { return _method_handle(); }
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75 oop method_type_oop() { return MethodHandle_type_oop(); }
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76 oop vmtarget_oop() { return MethodHandle_vmtarget_oop(); }
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77
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78 jint adapter_conversion() { assert(is_adapter(), ""); return _conversion; }
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79 int adapter_conversion_op() { return MethodHandles::adapter_conversion_op(adapter_conversion()); }
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80 BasicType adapter_conversion_src_type()
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81 { return MethodHandles::adapter_conversion_src_type(adapter_conversion()); }
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82 BasicType adapter_conversion_dest_type()
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83 { return MethodHandles::adapter_conversion_dest_type(adapter_conversion()); }
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84 int adapter_conversion_stack_move()
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85 { return MethodHandles::adapter_conversion_stack_move(adapter_conversion()); }
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86 int adapter_conversion_stack_pushes()
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87 { return adapter_conversion_stack_move() / MethodHandles::stack_move_unit(); }
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88 int adapter_conversion_vminfo()
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89 { return MethodHandles::adapter_conversion_vminfo(adapter_conversion()); }
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90 int adapter_arg_slot() { assert(is_adapter(), ""); return _arg_slot; }
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91 oop adapter_arg_oop() { assert(is_adapter(), ""); return BoundMethodHandle_argument_oop(); }
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92
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93 BasicType bound_arg_type() { assert(is_bound(), ""); return _arg_type; }
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94 int bound_arg_slot() { assert(is_bound(), ""); return _arg_slot; }
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95 oop bound_arg_oop() { assert(is_bound(), ""); return BoundMethodHandle_argument_oop(); }
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96
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97 methodOop last_method_oop() { assert(is_last(), ""); return _last_method(); }
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98 Bytecodes::Code last_invoke_code() { assert(is_last(), ""); return _last_invoke; }
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99
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100 void lose(const char* msg, TRAPS);
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101 const char* lose_message() { return _lose_message; }
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102 };
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103
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104
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105 // Structure walker for method handles.
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106 // Does abstract interpretation on top of low-level parsing.
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107 // You supply the tokens shuffled by the abstract interpretation.
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108 class MethodHandleWalker : StackObj {
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109 public:
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110 // Stack values:
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111 enum TokenType {
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112 tt_void,
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113 tt_parameter,
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114 tt_temporary,
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115 tt_constant,
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116 tt_illegal
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117 };
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118
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119 // Argument token:
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120 class ArgToken {
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121 private:
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122 TokenType _tt;
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123 BasicType _bt;
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124 jvalue _value;
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125 Handle _handle;
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126
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127 public:
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128 ArgToken(TokenType tt = tt_illegal) : _tt(tt) {}
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129 ArgToken(TokenType tt, BasicType bt, jvalue value) : _tt(tt), _bt(bt), _value(value) {}
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130
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131 ArgToken(TokenType tt, BasicType bt, int index) : _tt(tt), _bt(bt) {
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132 _value.i = index;
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133 }
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134
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135 ArgToken(TokenType tt, BasicType bt, Handle value) : _tt(tt), _bt(bt) {
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136 _handle = value;
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137 }
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138
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139 TokenType token_type() const { return _tt; }
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140 BasicType basic_type() const { return _bt; }
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141 int index() const { return _value.i; }
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142 Handle object() const { return _handle; }
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143
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144 jint get_jint() const { return _value.i; }
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145 jlong get_jlong() const { return _value.j; }
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146 jfloat get_jfloat() const { return _value.f; }
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147 jdouble get_jdouble() const { return _value.d; }
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148 };
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149
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150 // Abstract interpretation state:
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151 struct SlotState {
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152 BasicType _type;
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153 ArgToken _arg;
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154 SlotState() : _type(), _arg() {}
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155 };
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156 static SlotState make_state(BasicType type, ArgToken arg) {
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157 SlotState ss;
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158 ss._type = type; ss._arg = arg;
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159 return ss;
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160 }
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161
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162 private:
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163 MethodHandleChain _chain;
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164 bool _for_invokedynamic;
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165 int _local_index;
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166
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167 GrowableArray<SlotState> _outgoing; // current outgoing parameter slots
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168 int _outgoing_argc; // # non-empty outgoing slots
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169
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170 // Replace a value of type old_type at slot (and maybe slot+1) with the new value.
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171 // If old_type != T_VOID, remove the old argument at that point.
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172 // If new_type != T_VOID, insert the new argument at that point.
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173 // Insert or delete a second empty slot as needed.
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174 void change_argument(BasicType old_type, int slot, BasicType new_type, const ArgToken& new_arg);
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175
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176 SlotState* slot_state(int slot) {
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177 if (slot < 0 || slot >= _outgoing.length())
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178 return NULL;
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179 return _outgoing.adr_at(slot);
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180 }
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181 BasicType slot_type(int slot) {
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182 SlotState* ss = slot_state(slot);
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183 if (ss == NULL)
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184 return T_ILLEGAL;
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185 return ss->_type;
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186 }
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187 bool slot_has_argument(int slot) {
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188 return slot_type(slot) < T_VOID;
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189 }
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190
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191 #ifdef ASSERT
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192 int argument_count_slow();
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193 #endif
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194
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195 // Return a bytecode for converting src to dest, if one exists.
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196 Bytecodes::Code conversion_code(BasicType src, BasicType dest);
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197
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198 void walk_incoming_state(TRAPS);
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199
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200 public:
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201 MethodHandleWalker(Handle root, bool for_invokedynamic, TRAPS)
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202 : _chain(root, THREAD),
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203 _for_invokedynamic(for_invokedynamic),
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204 _outgoing(THREAD, 10),
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205 _outgoing_argc(0)
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206 {
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207 _local_index = for_invokedynamic ? 0 : 1;
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208 }
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209
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210 MethodHandleChain& chain() { return _chain; }
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211
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212 bool for_invokedynamic() const { return _for_invokedynamic; }
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213
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214 int new_local_index(BasicType bt) {
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215 //int index = _for_invokedynamic ? _local_index : _local_index - 1;
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216 int index = _local_index;
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217 _local_index += type2size[bt];
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218 return index;
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219 }
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220
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221 int max_locals() const { return _local_index; }
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222
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223 // plug-in abstract interpretation steps:
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224 virtual ArgToken make_parameter( BasicType type, klassOop tk, int argnum, TRAPS ) = 0;
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225 virtual ArgToken make_prim_constant( BasicType type, jvalue* con, TRAPS ) = 0;
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226 virtual ArgToken make_oop_constant( oop con, TRAPS ) = 0;
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227 virtual ArgToken make_conversion( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS ) = 0;
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228 virtual ArgToken make_fetch( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS ) = 0;
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229 virtual ArgToken make_invoke( methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS ) = 0;
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230
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231 // For make_invoke, the methodOop can be NULL if the intrinsic ID
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232 // is something other than vmIntrinsics::_none.
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233
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234 // and in case anyone cares to related the previous actions to the chain:
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235 virtual void set_method_handle(oop mh) { }
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236
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237 void lose(const char* msg, TRAPS) { chain().lose(msg, THREAD); }
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238 const char* lose_message() { return chain().lose_message(); }
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239
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240 ArgToken walk(TRAPS);
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241 };
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242
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243
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244 // An abstract interpreter for method handle chains.
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245 // Produces an account of the semantics of a chain, in terms of a static IR.
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246 // The IR happens to be JVM bytecodes.
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247 class MethodHandleCompiler : public MethodHandleWalker {
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248 private:
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249 methodHandle _callee;
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250 KlassHandle _rklass; // Return type for casting.
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251 BasicType _rtype;
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252 KlassHandle _target_klass;
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253 Thread* _thread;
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254
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255 // Fake constant pool entry.
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256 class ConstantValue {
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257 private:
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258 int _tag; // Constant pool tag type.
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259 JavaValue _value;
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260 Handle _handle;
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261
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262 public:
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263 // Constructor for oop types.
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264 ConstantValue(int tag, Handle con) : _tag(tag), _handle(con) {
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265 assert(tag == JVM_CONSTANT_Utf8 ||
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266 tag == JVM_CONSTANT_Class ||
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267 tag == JVM_CONSTANT_String ||
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268 tag == JVM_CONSTANT_Object, "must be oop type");
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269 }
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270
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271 // Constructor for oop reference types.
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272 ConstantValue(int tag, int index) : _tag(tag) {
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273 assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type");
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274 _value.set_jint(index);
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275 }
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276 ConstantValue(int tag, int first_index, int second_index) : _tag(tag) {
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277 assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type");
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278 _value.set_jint(first_index << 16 | second_index);
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279 }
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280
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281 // Constructor for primitive types.
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282 ConstantValue(BasicType bt, jvalue con) {
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283 _value.set_type(bt);
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284 switch (bt) {
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285 case T_INT: _tag = JVM_CONSTANT_Integer; _value.set_jint( con.i); break;
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286 case T_LONG: _tag = JVM_CONSTANT_Long; _value.set_jlong( con.j); break;
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287 case T_FLOAT: _tag = JVM_CONSTANT_Float; _value.set_jfloat( con.f); break;
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288 case T_DOUBLE: _tag = JVM_CONSTANT_Double; _value.set_jdouble(con.d); break;
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289 default: ShouldNotReachHere();
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290 }
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291 }
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292
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293 int tag() const { return _tag; }
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294 symbolOop symbol_oop() const { return (symbolOop) _handle(); }
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295 klassOop klass_oop() const { return (klassOop) _handle(); }
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296 oop object_oop() const { return _handle(); }
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297 int index() const { return _value.get_jint(); }
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298 int first_index() const { return _value.get_jint() >> 16; }
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299 int second_index() const { return _value.get_jint() & 0x0000FFFF; }
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300
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301 bool is_primitive() const { return is_java_primitive(_value.get_type()); }
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302 jint get_jint() const { return _value.get_jint(); }
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303 jlong get_jlong() const { return _value.get_jlong(); }
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304 jfloat get_jfloat() const { return _value.get_jfloat(); }
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305 jdouble get_jdouble() const { return _value.get_jdouble(); }
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306 };
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307
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308 // Fake constant pool.
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309 GrowableArray<ConstantValue*> _constants;
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310
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311 // Accumulated compiler state:
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312 GrowableArray<unsigned char> _bytecode;
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313
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314 int _cur_stack;
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315 int _max_stack;
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316 int _num_params;
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317 int _name_index;
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318 int _signature_index;
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319
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320 void stack_push(BasicType bt) {
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321 _cur_stack += type2size[bt];
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322 if (_cur_stack > _max_stack) _max_stack = _cur_stack;
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323 }
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324 void stack_pop(BasicType bt) {
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325 _cur_stack -= type2size[bt];
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326 assert(_cur_stack >= 0, "sanity");
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327 }
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328
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329 unsigned char* bytecode() const { return _bytecode.adr_at(0); }
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330 int bytecode_length() const { return _bytecode.length(); }
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331
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332 // Fake constant pool.
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333 int cpool_oop_put(int tag, Handle con) {
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334 if (con.is_null()) return 0;
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335 ConstantValue* cv = new ConstantValue(tag, con);
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336 return _constants.append(cv);
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337 }
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338
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339 int cpool_oop_reference_put(int tag, int first_index, int second_index) {
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340 if (first_index == 0 && second_index == 0) return 0;
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341 assert(first_index != 0 && second_index != 0, "no zero indexes");
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342 ConstantValue* cv = new ConstantValue(tag, first_index, second_index);
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343 return _constants.append(cv);
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344 }
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345
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346 int cpool_primitive_put(BasicType type, jvalue* con);
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347
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348 int cpool_int_put(jint value) {
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349 jvalue con; con.i = value;
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350 return cpool_primitive_put(T_INT, &con);
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351 }
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352 int cpool_long_put(jlong value) {
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353 jvalue con; con.j = value;
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354 return cpool_primitive_put(T_LONG, &con);
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355 }
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356 int cpool_float_put(jfloat value) {
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357 jvalue con; con.f = value;
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358 return cpool_primitive_put(T_FLOAT, &con);
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359 }
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360 int cpool_double_put(jdouble value) {
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361 jvalue con; con.d = value;
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362 return cpool_primitive_put(T_DOUBLE, &con);
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363 }
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364
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365 int cpool_object_put(Handle obj) {
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366 return cpool_oop_put(JVM_CONSTANT_Object, obj);
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367 }
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368 int cpool_symbol_put(symbolOop sym) {
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369 return cpool_oop_put(JVM_CONSTANT_Utf8, sym);
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370 }
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371 int cpool_klass_put(klassOop klass) {
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372 return cpool_oop_put(JVM_CONSTANT_Class, klass);
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373 }
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374 int cpool_methodref_put(int class_index, int name_and_type_index) {
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375 return cpool_oop_reference_put(JVM_CONSTANT_Methodref, class_index, name_and_type_index);
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376 }
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377 int cpool_name_and_type_put(int name_index, int signature_index) {
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378 return cpool_oop_reference_put(JVM_CONSTANT_NameAndType, name_index, signature_index);
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379 }
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380
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381 void emit_bc(Bytecodes::Code op, int index = 0);
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382 void emit_load(BasicType bt, int index);
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383 void emit_store(BasicType bt, int index);
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384 void emit_load_constant(ArgToken arg);
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385
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386 virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
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387 return ArgToken(tt_parameter, type, argnum);
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388 }
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389 virtual ArgToken make_oop_constant(oop con, TRAPS) {
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390 Handle h(THREAD, con);
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391 return ArgToken(tt_constant, T_OBJECT, h);
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392 }
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393 virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
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394 return ArgToken(tt_constant, type, *con);
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395 }
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396
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397 virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS);
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398 virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS);
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399 virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS);
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400
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401 // Get a real constant pool.
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402 constantPoolHandle get_constant_pool(TRAPS) const;
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403
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404 // Get a real methodOop.
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405 methodHandle get_method_oop(TRAPS) const;
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406
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407 public:
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408 MethodHandleCompiler(Handle root, methodHandle call_method, bool for_invokedynamic, TRAPS);
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409
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410 // Compile the given MH chain into bytecode.
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411 methodHandle compile(TRAPS);
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412
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413 // Tests if the given class is a MH adapter holder.
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414 static bool klass_is_method_handle_adapter_holder(klassOop klass) {
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415 return (klass == SystemDictionary::MethodHandle_klass() ||
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416 klass == SystemDictionary::InvokeDynamic_klass());
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417 }
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418 };
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419
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420 #endif // SHARE_VM_PRIMS_METHODHANDLEWALK_HPP