Mercurial > hg > truffle
annotate src/share/vm/interpreter/linkResolver.hpp @ 17458:ddcb2ac2900d
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date | Thu, 12 Dec 2013 20:55:36 -0500 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_INTERPRETER_LINKRESOLVER_HPP |
26 #define SHARE_VM_INTERPRETER_LINKRESOLVER_HPP | |
27 | |
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28 #include "oops/method.hpp" |
1972 | 29 #include "utilities/top.hpp" |
30 | |
0 | 31 // All the necessary definitions for run-time link resolution. |
32 | |
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33 // CallInfo provides all the information gathered for a particular |
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34 // linked call site after resolving it. A link is any reference |
0 | 35 // made from within the bytecodes of a method to an object outside of |
36 // that method. If the info is invalid, the link has not been resolved | |
37 // successfully. | |
38 | |
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39 class CallInfo VALUE_OBJ_CLASS_SPEC { |
0 | 40 public: |
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41 // Ways that a method call might be selected (or not) based on receiver type. |
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42 // Note that an invokevirtual instruction might be linked with no_dispatch, |
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43 // and an invokeinterface instruction might be linked with any of the three options |
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44 enum CallKind { |
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45 direct_call, // jump into resolved_method (must be concrete) |
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46 vtable_call, // select recv.klass.method_at_vtable(index) |
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47 itable_call, // select recv.klass.method_at_itable(resolved_method.holder, index) |
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48 unknown_kind = -1 |
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49 }; |
0 | 50 private: |
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51 KlassHandle _resolved_klass; // static receiver klass, resolved from a symbolic reference |
0 | 52 KlassHandle _selected_klass; // dynamic receiver class (same as static, or subklass) |
53 methodHandle _resolved_method; // static target method | |
54 methodHandle _selected_method; // dynamic (actual) target method | |
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55 CallKind _call_kind; // kind of call (static(=bytecode static/special + |
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56 // others inferred), vtable, itable) |
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57 int _call_index; // vtable or itable index of selected class method (if any) |
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58 Handle _resolved_appendix; // extra argument in constant pool (if CPCE::has_appendix) |
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59 Handle _resolved_method_type; // MethodType (for invokedynamic and invokehandle call sites) |
0 | 60 |
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61 void set_static( KlassHandle resolved_klass, methodHandle resolved_method , TRAPS); |
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62 void set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int itable_index , TRAPS); |
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63 void set_virtual( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index , TRAPS); |
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64 void set_handle( methodHandle resolved_method, Handle resolved_appendix, Handle resolved_method_type, TRAPS); |
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65 void set_common( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, CallKind kind, int index, TRAPS); |
0 | 66 |
67 friend class LinkResolver; | |
68 | |
69 public: | |
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70 CallInfo() { |
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71 #ifndef PRODUCT |
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72 _call_kind = CallInfo::unknown_kind; |
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73 _call_index = Method::garbage_vtable_index; |
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74 #endif //PRODUCT |
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75 } |
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76 |
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77 // utility to extract an effective CallInfo from a method and an optional receiver limit |
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78 // does not queue the method for compilation |
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79 CallInfo(Method* resolved_method, Klass* resolved_klass = NULL); |
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80 |
0 | 81 KlassHandle resolved_klass() const { return _resolved_klass; } |
82 KlassHandle selected_klass() const { return _selected_klass; } | |
83 methodHandle resolved_method() const { return _resolved_method; } | |
84 methodHandle selected_method() const { return _selected_method; } | |
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85 Handle resolved_appendix() const { return _resolved_appendix; } |
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86 Handle resolved_method_type() const { return _resolved_method_type; } |
0 | 87 |
88 BasicType result_type() const { return selected_method()->result_type(); } | |
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89 CallKind call_kind() const { return _call_kind; } |
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90 int call_index() const { return _call_index; } |
0 | 91 int vtable_index() const { |
92 // Even for interface calls the vtable index could be non-negative. | |
93 // See CallInfo::set_interface. | |
94 assert(has_vtable_index() || is_statically_bound(), ""); | |
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95 assert(call_kind() == vtable_call || call_kind() == direct_call, ""); |
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96 // The returned value is < 0 if the call is statically bound. |
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97 // But, the returned value may be >= 0 even if the kind is direct_call. |
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98 // It is up to the caller to decide which way to go. |
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99 return _call_index; |
0 | 100 } |
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101 int itable_index() const { |
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102 assert(call_kind() == itable_call, ""); |
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103 // The returned value is always >= 0, a valid itable index. |
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104 return _call_index; |
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105 } |
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106 |
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107 // debugging |
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108 #ifdef ASSERT |
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109 bool has_vtable_index() const { return _call_index >= 0 && _call_kind != CallInfo::itable_call; } |
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110 bool is_statically_bound() const { return _call_index == Method::nonvirtual_vtable_index; } |
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111 #endif //ASSERT |
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112 void verify() PRODUCT_RETURN; |
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113 void print() PRODUCT_RETURN; |
0 | 114 }; |
115 | |
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116 // Link information for getfield/putfield & getstatic/putstatic bytecodes |
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117 // is represented using a fieldDescriptor. |
0 | 118 |
119 // The LinkResolver is used to resolve constant-pool references at run-time. | |
120 // It does all necessary link-time checks & throws exceptions if necessary. | |
121 | |
122 class LinkResolver: AllStatic { | |
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123 friend class klassVtable; |
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124 friend class klassItable; |
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125 |
0 | 126 private: |
13413 | 127 static void lookup_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, bool checkpolymorphism, TRAPS); |
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128 static void lookup_instance_method_in_klasses (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); |
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129 static void lookup_method_in_interfaces (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); |
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130 static void lookup_polymorphic_method (methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, |
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131 KlassHandle current_klass, Handle *appendix_result_or_null, Handle *method_type_result, TRAPS); |
0 | 132 |
133 static void resolve_klass (KlassHandle& result, constantPoolHandle pool, int index, TRAPS); | |
134 | |
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135 static void resolve_pool (KlassHandle& resolved_klass, Symbol*& method_name, Symbol*& method_signature, KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS); |
0 | 136 |
13413 | 137 static void resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool nostatics, TRAPS); |
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138 static void resolve_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool require_methodref, TRAPS); |
0 | 139 |
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140 static void linktime_resolve_static_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); |
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141 static void linktime_resolve_special_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); |
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142 static void linktime_resolve_virtual_method (methodHandle &resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature,KlassHandle current_klass, bool check_access, TRAPS); |
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143 static void linktime_resolve_interface_method (methodHandle& resolved_method, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); |
0 | 144 |
145 static void runtime_resolve_special_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, KlassHandle current_klass, bool check_access, TRAPS); | |
146 static void runtime_resolve_virtual_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS); | |
147 static void runtime_resolve_interface_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS); | |
148 | |
149 static void check_field_accessability (KlassHandle ref_klass, KlassHandle resolved_klass, KlassHandle sel_klass, fieldDescriptor& fd, TRAPS); | |
150 static void check_method_accessability (KlassHandle ref_klass, KlassHandle resolved_klass, KlassHandle sel_klass, methodHandle sel_method, TRAPS); | |
151 | |
152 public: | |
153 // constant pool resolving | |
154 static void check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS); | |
155 | |
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156 // static resolving calls (will not run any Java code); used only from Bytecode_invoke::static_target |
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157 static void resolve_method_statically(methodHandle& method_result, KlassHandle& klass_result, |
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158 Bytecodes::Code code, constantPoolHandle pool, int index, TRAPS); |
0 | 159 |
160 // runtime/static resolving for fields | |
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161 static void resolve_field_access(fieldDescriptor& result, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS); |
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162 static void resolve_field(fieldDescriptor& result, KlassHandle resolved_klass, Symbol* field_name, Symbol* field_signature, |
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163 KlassHandle current_klass, Bytecodes::Code access_kind, bool check_access, bool initialize_class, TRAPS); |
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164 |
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165 // source of access_kind codes: |
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166 static Bytecodes::Code field_access_kind(bool is_static, bool is_put) { |
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167 return (is_static |
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168 ? (is_put ? Bytecodes::_putstatic : Bytecodes::_getstatic) |
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169 : (is_put ? Bytecodes::_putfield : Bytecodes::_getfield )); |
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170 } |
0 | 171 |
172 // runtime resolving: | |
173 // resolved_klass = specified class (i.e., static receiver class) | |
174 // current_klass = sending method holder (i.e., class containing the method containing the call being resolved) | |
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175 static void resolve_static_call (CallInfo& result, KlassHandle& resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool initialize_klass, TRAPS); |
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176 static void resolve_special_call (CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, TRAPS); |
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177 static void resolve_virtual_call (CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool check_null_and_abstract, TRAPS); |
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178 static void resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access, bool check_null_and_abstract, TRAPS); |
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179 static void resolve_handle_call (CallInfo& result, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, TRAPS); |
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180 static void resolve_dynamic_call (CallInfo& result, Handle bootstrap_specifier, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, TRAPS); |
0 | 181 |
182 // same as above for compile-time resolution; but returns null handle instead of throwing an exception on error | |
183 // also, does not initialize klass (i.e., no side effects) | |
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184 static methodHandle resolve_virtual_call_or_null (KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); |
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185 static methodHandle resolve_interface_call_or_null(KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); |
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186 static methodHandle resolve_static_call_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); |
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187 static methodHandle resolve_special_call_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); |
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188 static int vtable_index_of_interface_method(KlassHandle klass, methodHandle resolved_method); |
0 | 189 |
190 // same as above for compile-time resolution; returns vtable_index if current_klass if linked | |
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191 static int resolve_virtual_vtable_index (KlassHandle receiver_klass, KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass); |
0 | 192 |
193 // static resolving for compiler (does not throw exceptions, returns null handle if unsuccessful) | |
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194 static methodHandle linktime_resolve_virtual_method_or_null (KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access); |
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195 static methodHandle linktime_resolve_interface_method_or_null(KlassHandle resolved_klass, Symbol* method_name, Symbol* method_signature, KlassHandle current_klass, bool check_access); |
0 | 196 |
197 // runtime resolving from constant pool | |
198 static void resolve_invokestatic (CallInfo& result, constantPoolHandle pool, int index, TRAPS); | |
199 static void resolve_invokespecial (CallInfo& result, constantPoolHandle pool, int index, TRAPS); | |
200 static void resolve_invokevirtual (CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS); | |
201 static void resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS); | |
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202 static void resolve_invokedynamic (CallInfo& result, constantPoolHandle pool, int index, TRAPS); |
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203 static void resolve_invokehandle (CallInfo& result, constantPoolHandle pool, int index, TRAPS); |
0 | 204 |
205 static void resolve_invoke (CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS); | |
206 }; | |
1972 | 207 |
208 #endif // SHARE_VM_INTERPRETER_LINKRESOLVER_HPP |