Mercurial > hg > graal-compiler

annotate src/share/vm/prims/methodHandleWalk.hpp @ 1552:c18cbe5936b8

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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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date Thu, 27 May 2010 19:08:38 -0700
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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 // Low-level parser for method handle chains.
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26 class MethodHandleChain : StackObj {
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27 public:
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28 typedef MethodHandles::EntryKind EntryKind;
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29
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30 private:
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31 Handle _root; // original target
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32 Handle _method_handle; // current target
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33 bool _is_last; // final guy in chain
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34 bool _is_bound; // has a bound argument
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35 BasicType _arg_type; // if is_bound, the bound argument type
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36 int _arg_slot; // if is_bound or is_adapter, affected argument slot
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37 jint _conversion; // conversion field of AMH or -1
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38 methodHandle _last_method; // if is_last, which method we target
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39 Bytecodes::Code _last_invoke; // if is_last, type of invoke
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40 const char* _lose_message; // saved argument to lose()
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41
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42 void set_method_handle(Handle target, TRAPS);
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43 void set_last_method(oop target, TRAPS);
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44 static BasicType compute_bound_arg_type(oop target, methodOop m, int arg_slot, TRAPS);
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45
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46 oop MethodHandle_type_oop() { return java_dyn_MethodHandle::type(method_handle_oop()); }
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47 oop MethodHandle_vmtarget_oop() { return java_dyn_MethodHandle::vmtarget(method_handle_oop()); }
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48 int MethodHandle_vmslots() { return java_dyn_MethodHandle::vmslots(method_handle_oop()); }
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49 int DirectMethodHandle_vmindex() { return sun_dyn_DirectMethodHandle::vmindex(method_handle_oop()); }
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50 oop BoundMethodHandle_argument_oop() { return sun_dyn_BoundMethodHandle::argument(method_handle_oop()); }
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51 int BoundMethodHandle_vmargslot() { return sun_dyn_BoundMethodHandle::vmargslot(method_handle_oop()); }
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52 int AdapterMethodHandle_conversion() { return sun_dyn_AdapterMethodHandle::conversion(method_handle_oop()); }
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53
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54 public:
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55 MethodHandleChain(Handle root, TRAPS)
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56 : _root(root)
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57 { set_method_handle(root, THREAD); }
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58
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59 bool is_adapter() { return _conversion != -1; }
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60 bool is_bound() { return _is_bound; }
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61 bool is_last() { return _is_last; }
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62
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63 void next(TRAPS) {
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64 assert(!is_last(), "");
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65 set_method_handle(MethodHandle_vmtarget_oop(), THREAD);
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66 }
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67
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68 Handle method_handle() { return _method_handle; }
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69 oop method_handle_oop() { return _method_handle(); }
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70 oop method_type_oop() { return MethodHandle_type_oop(); }
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71 oop vmtarget_oop() { return MethodHandle_vmtarget_oop(); }
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72
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73 jint adapter_conversion() { assert(is_adapter(), ""); return _conversion; }
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74 int adapter_conversion_op() { return MethodHandles::adapter_conversion_op(adapter_conversion()); }
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75 BasicType adapter_conversion_src_type()
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76 { return MethodHandles::adapter_conversion_src_type(adapter_conversion()); }
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77 BasicType adapter_conversion_dest_type()
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78 { return MethodHandles::adapter_conversion_dest_type(adapter_conversion()); }
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79 int adapter_conversion_stack_move()
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80 { return MethodHandles::adapter_conversion_stack_move(adapter_conversion()); }
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81 int adapter_conversion_stack_pushes()
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82 { return adapter_conversion_stack_move() / MethodHandles::stack_move_unit(); }
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83 int adapter_conversion_vminfo()
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84 { return MethodHandles::adapter_conversion_vminfo(adapter_conversion()); }
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85 int adapter_arg_slot() { assert(is_adapter(), ""); return _arg_slot; }
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86 oop adapter_arg_oop() { assert(is_adapter(), ""); return BoundMethodHandle_argument_oop(); }
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87
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88 BasicType bound_arg_type() { assert(is_bound(), ""); return _arg_type; }
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89 int bound_arg_slot() { assert(is_bound(), ""); return _arg_slot; }
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90 oop bound_arg_oop() { assert(is_bound(), ""); return BoundMethodHandle_argument_oop(); }
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91
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92 methodOop last_method_oop() { assert(is_last(), ""); return _last_method(); }
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93 Bytecodes::Code last_invoke_code() { assert(is_last(), ""); return _last_invoke; }
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94
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95 void lose(const char* msg, TRAPS);
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96 const char* lose_message() { return _lose_message; }
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97 };
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98
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99
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100 // Structure walker for method handles.
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101 // Does abstract interpretation on top of low-level parsing.
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102 // You supply the tokens shuffled by the abstract interpretation.
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103 class MethodHandleWalker : StackObj {
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104 public:
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105 // Stack values:
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106 enum TokenType {
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107 tt_void,
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108 tt_parameter,
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109 tt_temporary,
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110 tt_constant,
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111 tt_illegal
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112 };
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113
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114 // Argument token:
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115 class ArgToken {
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116 private:
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117 TokenType _tt;
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118 BasicType _bt;
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119 jvalue _value;
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120 Handle _handle;
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121
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122 public:
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123 ArgToken(TokenType tt = tt_illegal) : _tt(tt) {}
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124 ArgToken(TokenType tt, BasicType bt, jvalue value) : _tt(tt), _bt(bt), _value(value) {}
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125
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126 ArgToken(TokenType tt, BasicType bt, int index) : _tt(tt), _bt(bt) {
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127 _value.i = index;
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128 }
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129
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130 ArgToken(TokenType tt, BasicType bt, Handle value) : _tt(tt), _bt(bt) {
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131 _handle = value;
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132 }
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133
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134 TokenType token_type() const { return _tt; }
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135 BasicType basic_type() const { return _bt; }
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136 int index() const { return _value.i; }
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137 Handle object() const { return _handle; }
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138
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139 jint get_jint() const { return _value.i; }
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140 jlong get_jlong() const { return _value.j; }
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141 jfloat get_jfloat() const { return _value.f; }
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142 jdouble get_jdouble() const { return _value.d; }
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143 };
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144
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145 // Abstract interpretation state:
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146 struct SlotState {
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147 BasicType _type;
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148 ArgToken _arg;
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149 SlotState() : _type(), _arg() {}
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150 };
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151 static SlotState make_state(BasicType type, ArgToken arg) {
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152 SlotState ss;
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153 ss._type = type; ss._arg = arg;
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154 return ss;
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155 }
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156
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157 private:
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158 MethodHandleChain _chain;
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159 bool _for_invokedynamic;
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160 int _local_index;
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161
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162 GrowableArray<SlotState> _outgoing; // current outgoing parameter slots
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163 int _outgoing_argc; // # non-empty outgoing slots
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164
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165 // Replace a value of type old_type at slot (and maybe slot+1) with the new value.
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166 // If old_type != T_VOID, remove the old argument at that point.
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167 // If new_type != T_VOID, insert the new argument at that point.
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168 // Insert or delete a second empty slot as needed.
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169 void change_argument(BasicType old_type, int slot, BasicType new_type, const ArgToken& new_arg);
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170
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171 SlotState* slot_state(int slot) {
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172 if (slot < 0 || slot >= _outgoing.length())
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173 return NULL;
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174 return _outgoing.adr_at(slot);
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175 }
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176 BasicType slot_type(int slot) {
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177 SlotState* ss = slot_state(slot);
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178 if (ss == NULL)
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179 return T_ILLEGAL;
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180 return ss->_type;
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181 }
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182 bool slot_has_argument(int slot) {
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183 return slot_type(slot) < T_VOID;
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184 }
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185
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186 #ifdef ASSERT
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187 int argument_count_slow();
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188 #endif
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189
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190 // Return a bytecode for converting src to dest, if one exists.
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191 Bytecodes::Code conversion_code(BasicType src, BasicType dest);
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192
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193 void walk_incoming_state(TRAPS);
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194
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195 public:
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196 MethodHandleWalker(Handle root, bool for_invokedynamic, TRAPS)
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197 : _chain(root, THREAD),
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198 _for_invokedynamic(for_invokedynamic),
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199 _outgoing(THREAD, 10),
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200 _outgoing_argc(0)
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201 {
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202 _local_index = for_invokedynamic ? 0 : 1;
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203 }
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204
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205 MethodHandleChain& chain() { return _chain; }
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206
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207 bool for_invokedynamic() const { return _for_invokedynamic; }
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208
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209 int new_local_index(BasicType bt) {
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210 //int index = _for_invokedynamic ? _local_index : _local_index - 1;
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211 int index = _local_index;
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212 _local_index += type2size[bt];
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213 return index;
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214 }
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215
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216 int max_locals() const { return _local_index; }
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217
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218 // plug-in abstract interpretation steps:
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219 virtual ArgToken make_parameter( BasicType type, klassOop tk, int argnum, TRAPS ) = 0;
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220 virtual ArgToken make_prim_constant( BasicType type, jvalue* con, TRAPS ) = 0;
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221 virtual ArgToken make_oop_constant( oop con, TRAPS ) = 0;
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222 virtual ArgToken make_conversion( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS ) = 0;
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223 virtual ArgToken make_fetch( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS ) = 0;
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224 virtual ArgToken make_invoke( methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS ) = 0;
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225
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226 // For make_invoke, the methodOop can be NULL if the intrinsic ID
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227 // is something other than vmIntrinsics::_none.
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228
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229 // and in case anyone cares to related the previous actions to the chain:
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230 virtual void set_method_handle(oop mh) { }
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231
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232 void lose(const char* msg, TRAPS) { chain().lose(msg, THREAD); }
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233 const char* lose_message() { return chain().lose_message(); }
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234
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235 ArgToken walk(TRAPS);
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236 };
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237
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238
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239 // An abstract interpreter for method handle chains.
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240 // Produces an account of the semantics of a chain, in terms of a static IR.
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241 // The IR happens to be JVM bytecodes.
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242 class MethodHandleCompiler : public MethodHandleWalker {
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243 private:
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244 methodHandle _callee;
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245 KlassHandle _rklass; // Return type for casting.
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246 BasicType _rtype;
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247 KlassHandle _target_klass;
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248 Thread* _thread;
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249
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250 // Fake constant pool entry.
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251 class ConstantValue {
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252 private:
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253 int _tag; // Constant pool tag type.
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254 JavaValue _value;
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255 Handle _handle;
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256
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257 public:
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258 // Constructor for oop types.
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259 ConstantValue(int tag, Handle con) : _tag(tag), _handle(con) {
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260 assert(tag == JVM_CONSTANT_Utf8 ||
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261 tag == JVM_CONSTANT_Class ||
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262 tag == JVM_CONSTANT_String ||
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263 tag == JVM_CONSTANT_Object, "must be oop type");
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264 }
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265
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266 // Constructor for oop reference types.
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267 ConstantValue(int tag, int index) : _tag(tag) {
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268 assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type");
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269 _value.set_jint(index);
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270 }
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271 ConstantValue(int tag, int first_index, int second_index) : _tag(tag) {
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272 assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type");
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273 _value.set_jint(first_index << 16 | second_index);
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274 }
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275
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276 // Constructor for primitive types.
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277 ConstantValue(BasicType bt, jvalue con) {
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278 _value.set_type(bt);
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279 switch (bt) {
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280 case T_INT: _tag = JVM_CONSTANT_Integer; _value.set_jint( con.i); break;
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281 case T_LONG: _tag = JVM_CONSTANT_Long; _value.set_jlong( con.j); break;
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282 case T_FLOAT: _tag = JVM_CONSTANT_Float; _value.set_jfloat( con.f); break;
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283 case T_DOUBLE: _tag = JVM_CONSTANT_Double; _value.set_jdouble(con.d); break;
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284 default: ShouldNotReachHere();
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285 }
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286 }
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287
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288 int tag() const { return _tag; }
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289 symbolOop symbol_oop() const { return (symbolOop) _handle(); }
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290 klassOop klass_oop() const { return (klassOop) _handle(); }
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291 oop object_oop() const { return _handle(); }
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292 int index() const { return _value.get_jint(); }
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293 int first_index() const { return _value.get_jint() >> 16; }
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294 int second_index() const { return _value.get_jint() & 0x0000FFFF; }
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295
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296 bool is_primitive() const { return is_java_primitive(_value.get_type()); }
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297 jint get_jint() const { return _value.get_jint(); }
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298 jlong get_jlong() const { return _value.get_jlong(); }
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299 jfloat get_jfloat() const { return _value.get_jfloat(); }
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300 jdouble get_jdouble() const { return _value.get_jdouble(); }
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301 };
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302
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303 // Fake constant pool.
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304 GrowableArray<ConstantValue*> _constants;
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305
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306 // Accumulated compiler state:
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307 GrowableArray<unsigned char> _bytecode;
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308
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309 int _cur_stack;
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310 int _max_stack;
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311 int _num_params;
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312 int _name_index;
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313 int _signature_index;
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314
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315 void stack_push(BasicType bt) {
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316 _cur_stack += type2size[bt];
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317 if (_cur_stack > _max_stack) _max_stack = _cur_stack;
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318 }
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319 void stack_pop(BasicType bt) {
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320 _cur_stack -= type2size[bt];
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321 assert(_cur_stack >= 0, "sanity");
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322 }
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323
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324 unsigned char* bytecode() const { return _bytecode.adr_at(0); }
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325 int bytecode_length() const { return _bytecode.length(); }
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326
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327 // Fake constant pool.
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328 int cpool_oop_put(int tag, Handle con) {
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329 if (con.is_null()) return 0;
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330 ConstantValue* cv = new ConstantValue(tag, con);
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331 return _constants.append(cv);
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332 }
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333
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334 int cpool_oop_reference_put(int tag, int first_index, int second_index) {
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335 if (first_index == 0 && second_index == 0) return 0;
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336 assert(first_index != 0 && second_index != 0, "no zero indexes");
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337 ConstantValue* cv = new ConstantValue(tag, first_index, second_index);
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338 return _constants.append(cv);
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339 }
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340
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341 int cpool_primitive_put(BasicType type, jvalue* con);
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342
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343 int cpool_int_put(jint value) {
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344 jvalue con; con.i = value;
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345 return cpool_primitive_put(T_INT, &con);
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346 }
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347 int cpool_long_put(jlong value) {
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348 jvalue con; con.j = value;
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349 return cpool_primitive_put(T_LONG, &con);
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350 }
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351 int cpool_float_put(jfloat value) {
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352 jvalue con; con.f = value;
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353 return cpool_primitive_put(T_FLOAT, &con);
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354 }
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355 int cpool_double_put(jdouble value) {
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356 jvalue con; con.d = value;
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357 return cpool_primitive_put(T_DOUBLE, &con);
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358 }
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359
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360 int cpool_object_put(Handle obj) {
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361 return cpool_oop_put(JVM_CONSTANT_Object, obj);
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362 }
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363 int cpool_symbol_put(symbolOop sym) {
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364 return cpool_oop_put(JVM_CONSTANT_Utf8, sym);
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365 }
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366 int cpool_klass_put(klassOop klass) {
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367 return cpool_oop_put(JVM_CONSTANT_Class, klass);
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368 }
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369 int cpool_methodref_put(int class_index, int name_and_type_index) {
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370 return cpool_oop_reference_put(JVM_CONSTANT_Methodref, class_index, name_and_type_index);
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371 }
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372 int cpool_name_and_type_put(int name_index, int signature_index) {
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373 return cpool_oop_reference_put(JVM_CONSTANT_NameAndType, name_index, signature_index);
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374 }
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375
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376 void emit_bc(Bytecodes::Code op, int index = 0);
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377 void emit_load(BasicType bt, int index);
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378 void emit_store(BasicType bt, int index);
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379 void emit_load_constant(ArgToken arg);
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380
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381 virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
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382 return ArgToken(tt_parameter, type, argnum);
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383 }
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384 virtual ArgToken make_oop_constant(oop con, TRAPS) {
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385 Handle h(THREAD, con);
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386 return ArgToken(tt_constant, T_OBJECT, h);
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387 }
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388 virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
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389 return ArgToken(tt_constant, type, *con);
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390 }
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391
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392 virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS);
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393 virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS);
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394 virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS);
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395
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396 // Get a real constant pool.
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397 constantPoolHandle get_constant_pool(TRAPS) const;
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398
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399 // Get a real methodOop.
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400 methodHandle get_method_oop(TRAPS) const;
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401
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402 public:
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403 MethodHandleCompiler(Handle root, methodHandle call_method, bool for_invokedynamic, TRAPS);
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404
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405 // Compile the given MH chain into bytecode.
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406 methodHandle compile(TRAPS);
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407
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408 // Tests if the given class is a MH adapter holder.
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409 static bool klass_is_method_handle_adapter_holder(klassOop klass) {
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410 return (klass == SystemDictionary::MethodHandle_klass() ||
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411 klass == SystemDictionary::InvokeDynamic_klass());
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412 }
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413 };