0
|
1 /*
|
|
2 * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
|
|
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 *
|
|
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 * have any questions.
|
|
22 *
|
|
23 */
|
|
24
|
|
25 // All the necessary definitions for run-time link resolution.
|
|
26
|
|
27 // LinkInfo & its subclasses provide all the information gathered
|
|
28 // for a particular link after resolving it. A link is any reference
|
|
29 // made from within the bytecodes of a method to an object outside of
|
|
30 // that method. If the info is invalid, the link has not been resolved
|
|
31 // successfully.
|
|
32
|
|
33 class LinkInfo VALUE_OBJ_CLASS_SPEC {
|
|
34 };
|
|
35
|
|
36
|
|
37 // Link information for getfield/putfield & getstatic/putstatic bytecodes.
|
|
38
|
|
39 class FieldAccessInfo: public LinkInfo {
|
|
40 protected:
|
|
41 KlassHandle _klass;
|
|
42 symbolHandle _name;
|
|
43 AccessFlags _access_flags;
|
|
44 int _field_index; // original index in the klass
|
|
45 int _field_offset;
|
|
46 BasicType _field_type;
|
|
47
|
|
48 public:
|
|
49 void set(KlassHandle klass, symbolHandle name, int field_index, int field_offset,
|
|
50 BasicType field_type, AccessFlags access_flags);
|
|
51 KlassHandle klass() const { return _klass; }
|
|
52 symbolHandle name() const { return _name; }
|
|
53 int field_index() const { return _field_index; }
|
|
54 int field_offset() const { return _field_offset; }
|
|
55 BasicType field_type() const { return _field_type; }
|
|
56 AccessFlags access_flags() const { return _access_flags; }
|
|
57
|
|
58 // debugging
|
|
59 void print() PRODUCT_RETURN;
|
|
60 };
|
|
61
|
|
62
|
|
63 // Link information for all calls.
|
|
64
|
|
65 class CallInfo: public LinkInfo {
|
|
66 private:
|
|
67 KlassHandle _resolved_klass; // static receiver klass
|
|
68 KlassHandle _selected_klass; // dynamic receiver class (same as static, or subklass)
|
|
69 methodHandle _resolved_method; // static target method
|
|
70 methodHandle _selected_method; // dynamic (actual) target method
|
|
71 int _vtable_index; // vtable index of selected method
|
|
72
|
|
73 void set_static( KlassHandle resolved_klass, methodHandle resolved_method , TRAPS);
|
|
74 void set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method , TRAPS);
|
|
75 void set_virtual( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS);
|
|
76 void set_common( KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS);
|
|
77
|
|
78 friend class LinkResolver;
|
|
79
|
|
80 public:
|
|
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; }
|
|
85
|
|
86 BasicType result_type() const { return selected_method()->result_type(); }
|
|
87 bool has_vtable_index() const { return _vtable_index >= 0; }
|
|
88 bool is_statically_bound() const { return _vtable_index == methodOopDesc::nonvirtual_vtable_index; }
|
|
89 int vtable_index() const {
|
|
90 // Even for interface calls the vtable index could be non-negative.
|
|
91 // See CallInfo::set_interface.
|
|
92 assert(has_vtable_index() || is_statically_bound(), "");
|
|
93 return _vtable_index;
|
|
94 }
|
|
95 };
|
|
96
|
|
97
|
|
98 // The LinkResolver is used to resolve constant-pool references at run-time.
|
|
99 // It does all necessary link-time checks & throws exceptions if necessary.
|
|
100
|
|
101 class LinkResolver: AllStatic {
|
|
102 private:
|
|
103 static void lookup_method_in_klasses (methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
|
|
104 static void lookup_instance_method_in_klasses (methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
|
|
105 static void lookup_method_in_interfaces (methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
|
|
106
|
|
107 static int vtable_index_of_miranda_method(KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
|
|
108
|
|
109 static void resolve_klass (KlassHandle& result, constantPoolHandle pool, int index, TRAPS);
|
|
110 static void resolve_klass_no_update (KlassHandle& result, constantPoolHandle pool, int index, TRAPS); // no update of constantPool entry
|
|
111
|
|
112 static void resolve_pool (KlassHandle& resolved_klass, symbolHandle& method_name, symbolHandle& method_signature, KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS);
|
|
113
|
|
114 static void resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS);
|
|
115 static void resolve_method (methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS);
|
|
116
|
|
117 static void linktime_resolve_static_method (methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS);
|
|
118 static void linktime_resolve_special_method (methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS);
|
|
119 static void linktime_resolve_virtual_method (methodHandle &resolved_method, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature,KlassHandle current_klass, bool check_access, TRAPS);
|
|
120 static void linktime_resolve_interface_method (methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS);
|
|
121
|
|
122 static void runtime_resolve_special_method (CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass, KlassHandle current_klass, bool check_access, TRAPS);
|
|
123 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);
|
|
124 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);
|
|
125
|
|
126 static void check_field_accessability (KlassHandle ref_klass, KlassHandle resolved_klass, KlassHandle sel_klass, fieldDescriptor& fd, TRAPS);
|
|
127 static void check_method_accessability (KlassHandle ref_klass, KlassHandle resolved_klass, KlassHandle sel_klass, methodHandle sel_method, TRAPS);
|
|
128
|
|
129 public:
|
|
130 // constant pool resolving
|
|
131 static void check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS);
|
|
132
|
|
133 // static resolving for all calls except interface calls
|
|
134 static void resolve_method (methodHandle& method_result, KlassHandle& klass_result, constantPoolHandle pool, int index, TRAPS);
|
|
135 static void resolve_interface_method(methodHandle& method_result, KlassHandle& klass_result, constantPoolHandle pool, int index, TRAPS);
|
|
136
|
|
137 // runtime/static resolving for fields
|
|
138 static void resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS);
|
|
139 // takes an extra bool argument "update_pool" to decide whether to update the constantPool during klass resolution.
|
|
140 static void resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS);
|
|
141
|
|
142 // runtime resolving:
|
|
143 // resolved_klass = specified class (i.e., static receiver class)
|
|
144 // current_klass = sending method holder (i.e., class containing the method containing the call being resolved)
|
|
145 static void resolve_static_call (CallInfo& result, KlassHandle& resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, bool initialize_klass, TRAPS);
|
|
146 static void resolve_special_call (CallInfo& result, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS);
|
|
147 static void resolve_virtual_call (CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, bool check_null_and_abstract, TRAPS);
|
|
148 static void resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access, bool check_null_and_abstract, TRAPS);
|
|
149
|
|
150 // same as above for compile-time resolution; but returns null handle instead of throwing an exception on error
|
|
151 // also, does not initialize klass (i.e., no side effects)
|
|
152 static methodHandle resolve_virtual_call_or_null (KlassHandle receiver_klass, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass);
|
|
153 static methodHandle resolve_interface_call_or_null(KlassHandle receiver_klass, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass);
|
|
154 static methodHandle resolve_static_call_or_null (KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass);
|
|
155 static methodHandle resolve_special_call_or_null (KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass);
|
|
156
|
|
157 // same as above for compile-time resolution; returns vtable_index if current_klass if linked
|
|
158 static int resolve_virtual_vtable_index (KlassHandle receiver_klass, KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass);
|
|
159
|
|
160 // static resolving for compiler (does not throw exceptions, returns null handle if unsuccessful)
|
|
161 static methodHandle linktime_resolve_virtual_method_or_null (KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access);
|
|
162 static methodHandle linktime_resolve_interface_method_or_null(KlassHandle resolved_klass, symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass, bool check_access);
|
|
163
|
|
164 // runtime resolving from constant pool
|
|
165 static void resolve_invokestatic (CallInfo& result, constantPoolHandle pool, int index, TRAPS);
|
|
166 static void resolve_invokespecial (CallInfo& result, constantPoolHandle pool, int index, TRAPS);
|
|
167 static void resolve_invokevirtual (CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS);
|
|
168 static void resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS);
|
|
169
|
|
170 static void resolve_invoke (CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS);
|
|
171 };
|