114 int itable_index() const {
115 assert(call_kind() == itable_call, "");
116 // The returned value is always >= 0, a valid itable index.
117 return _call_index;
118 }
119
120 // debugging
121 #ifdef ASSERT
122 bool has_vtable_index() const { return _call_index >= 0 && _call_kind != CallInfo::itable_call; }
123 bool is_statically_bound() const { return _call_index == Method::nonvirtual_vtable_index; }
124 #endif //ASSERT
125 void verify() PRODUCT_RETURN;
126 void print() PRODUCT_RETURN;
127 };
128
129
130 // Condensed information from constant pool to use to resolve the method or field.
131 // resolved_klass = specified class (i.e., static receiver class)
132 // current_klass = sending method holder (i.e., class containing the method
133 // containing the call being resolved)
134 class LinkInfo : public StackObj {
135 Symbol* _name; // extracted from JVM_CONSTANT_NameAndType
136 Symbol* _signature;
137 KlassHandle _resolved_klass; // class that the constant pool entry points to
138 KlassHandle _current_klass; // class that owns the constant pool
139 bool _check_access;
140 constantTag _tag;
141 public:
142 enum AccessCheck {
143 needs_access_check,
144 skip_access_check
145 };
146
147 LinkInfo(const constantPoolHandle& pool, int index, TRAPS);
148
149 // Condensed information from other call sites within the vm.
150 LinkInfo(KlassHandle resolved_klass, Symbol* name, Symbol* signature, KlassHandle current_klass,
151 AccessCheck check_access = needs_access_check,
152 constantTag tag = JVM_CONSTANT_Invalid) :
153 _resolved_klass(resolved_klass),
154 _name(name), _signature(signature), _current_klass(current_klass),
155 _check_access(check_access == needs_access_check), _tag(tag) {}
156
157 // Case where we just find the method and don't check access against the current class
158 LinkInfo(KlassHandle resolved_klass, Symbol*name, Symbol* signature) :
159 _resolved_klass(resolved_klass),
160 _name(name), _signature(signature), _current_klass(NULL),
161 _check_access(false), _tag(JVM_CONSTANT_Invalid) {}
162
163 // accessors
164 Symbol* name() const { return _name; }
165 Symbol* signature() const { return _signature; }
166 KlassHandle resolved_klass() const { return _resolved_klass; }
167 KlassHandle current_klass() const { return _current_klass; }
168 constantTag tag() const { return _tag; }
169 bool check_access() const { return _check_access; }
170 char* method_string() const;
171
172 void print() PRODUCT_RETURN;
173 };
174
175 // Link information for getfield/putfield & getstatic/putstatic bytecodes
176 // is represented using a fieldDescriptor.
177
178 // The LinkResolver is used to resolve constant-pool references at run-time.
179 // It does all necessary link-time checks & throws exceptions if necessary.
180
181 class LinkResolver: AllStatic {
182 friend class klassVtable;
183 friend class klassItable;
184
185 private:
186
187 static methodHandle lookup_method_in_klasses(const LinkInfo& link_info,
249 static void resolve_invokevirtual (CallInfo& result, Handle recv,
250 const constantPoolHandle& pool, int index, TRAPS);
251 static void resolve_invokeinterface(CallInfo& result, Handle recv,
252 const constantPoolHandle& pool, int index, TRAPS);
253 static void resolve_invokedynamic (CallInfo& result,
254 const constantPoolHandle& pool, int index, TRAPS);
255 static void resolve_invokehandle (CallInfo& result,
256 const constantPoolHandle& pool, int index, TRAPS);
257 public:
258 // constant pool resolving
259 static void check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS);
260
261 // static resolving calls (will not run any Java code);
262 // used only from Bytecode_invoke::static_target
263 static methodHandle resolve_method_statically(Bytecodes::Code code,
264 const constantPoolHandle& pool,
265 int index, TRAPS);
266
267 static void resolve_field_access(fieldDescriptor& result,
268 const constantPoolHandle& pool,
269 int index, Bytecodes::Code byte, TRAPS);
270 static void resolve_field(fieldDescriptor& result, const LinkInfo& link_info,
271 Bytecodes::Code access_kind,
272 bool initialize_class, TRAPS);
273
274 static void resolve_static_call (CallInfo& result,
275 const LinkInfo& link_info,
276 bool initialize_klass, TRAPS);
277 static void resolve_special_call (CallInfo& result,
278 const LinkInfo& link_info,
279 TRAPS);
280 static void resolve_virtual_call (CallInfo& result, Handle recv, KlassHandle recv_klass,
281 const LinkInfo& link_info,
282 bool check_null_and_abstract, TRAPS);
283 static void resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass,
284 const LinkInfo& link_info,
285 bool check_null_and_abstract, TRAPS);
286 static void resolve_handle_call (CallInfo& result,
287 const LinkInfo& link_info, TRAPS);
288 static void resolve_dynamic_call (CallInfo& result, Handle bootstrap_specifier,
289 Symbol* method_name, Symbol* method_signature,
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114 int itable_index() const {
115 assert(call_kind() == itable_call, "");
116 // The returned value is always >= 0, a valid itable index.
117 return _call_index;
118 }
119
120 // debugging
121 #ifdef ASSERT
122 bool has_vtable_index() const { return _call_index >= 0 && _call_kind != CallInfo::itable_call; }
123 bool is_statically_bound() const { return _call_index == Method::nonvirtual_vtable_index; }
124 #endif //ASSERT
125 void verify() PRODUCT_RETURN;
126 void print() PRODUCT_RETURN;
127 };
128
129
130 // Condensed information from constant pool to use to resolve the method or field.
131 // resolved_klass = specified class (i.e., static receiver class)
132 // current_klass = sending method holder (i.e., class containing the method
133 // containing the call being resolved)
134 // current_method = sending method (relevant for field resolution)
135 class LinkInfo : public StackObj {
136 Symbol* _name; // extracted from JVM_CONSTANT_NameAndType
137 Symbol* _signature;
138 KlassHandle _resolved_klass; // class that the constant pool entry points to
139 KlassHandle _current_klass; // class that owns the constant pool
140 methodHandle _current_method; // sending method
141 bool _check_access;
142 constantTag _tag;
143
144 public:
145 enum AccessCheck {
146 needs_access_check,
147 skip_access_check
148 };
149
150 LinkInfo(const constantPoolHandle& pool, int index, methodHandle current_method, TRAPS);
151 LinkInfo(const constantPoolHandle& pool, int index, TRAPS);
152
153 // Condensed information from other call sites within the vm.
154 LinkInfo(KlassHandle resolved_klass, Symbol* name, Symbol* signature, KlassHandle current_klass,
155 AccessCheck check_access = needs_access_check,
156 constantTag tag = JVM_CONSTANT_Invalid) :
157 _resolved_klass(resolved_klass),
158 _name(name), _signature(signature), _current_klass(current_klass), _current_method(NULL),
159 _check_access(check_access == needs_access_check), _tag(tag) {}
160
161 LinkInfo(KlassHandle resolved_klass, Symbol* name, Symbol* signature, methodHandle current_method,
162 AccessCheck check_access = needs_access_check,
163 constantTag tag = JVM_CONSTANT_Invalid) :
164 _resolved_klass(resolved_klass),
165 _name(name), _signature(signature), _current_klass(current_method->method_holder()), _current_method(current_method),
166 _check_access(check_access == needs_access_check), _tag(tag) {}
167
168 // Case where we just find the method and don't check access against the current class
169 LinkInfo(KlassHandle resolved_klass, Symbol*name, Symbol* signature) :
170 _resolved_klass(resolved_klass),
171 _name(name), _signature(signature), _current_klass(NULL), _current_method(NULL),
172 _check_access(false), _tag(JVM_CONSTANT_Invalid) {}
173
174 // accessors
175 Symbol* name() const { return _name; }
176 Symbol* signature() const { return _signature; }
177 KlassHandle resolved_klass() const { return _resolved_klass; }
178 KlassHandle current_klass() const { return _current_klass; }
179 methodHandle current_method() const { return _current_method; }
180 constantTag tag() const { return _tag; }
181 bool check_access() const { return _check_access; }
182 char* method_string() const;
183
184 void print() PRODUCT_RETURN;
185 };
186
187 // Link information for getfield/putfield & getstatic/putstatic bytecodes
188 // is represented using a fieldDescriptor.
189
190 // The LinkResolver is used to resolve constant-pool references at run-time.
191 // It does all necessary link-time checks & throws exceptions if necessary.
192
193 class LinkResolver: AllStatic {
194 friend class klassVtable;
195 friend class klassItable;
196
197 private:
198
199 static methodHandle lookup_method_in_klasses(const LinkInfo& link_info,
261 static void resolve_invokevirtual (CallInfo& result, Handle recv,
262 const constantPoolHandle& pool, int index, TRAPS);
263 static void resolve_invokeinterface(CallInfo& result, Handle recv,
264 const constantPoolHandle& pool, int index, TRAPS);
265 static void resolve_invokedynamic (CallInfo& result,
266 const constantPoolHandle& pool, int index, TRAPS);
267 static void resolve_invokehandle (CallInfo& result,
268 const constantPoolHandle& pool, int index, TRAPS);
269 public:
270 // constant pool resolving
271 static void check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS);
272
273 // static resolving calls (will not run any Java code);
274 // used only from Bytecode_invoke::static_target
275 static methodHandle resolve_method_statically(Bytecodes::Code code,
276 const constantPoolHandle& pool,
277 int index, TRAPS);
278
279 static void resolve_field_access(fieldDescriptor& result,
280 const constantPoolHandle& pool,
281 int index,
282 const methodHandle& method,
283 Bytecodes::Code byte, TRAPS);
284 static void resolve_field(fieldDescriptor& result, const LinkInfo& link_info,
285 Bytecodes::Code access_kind,
286 bool initialize_class, TRAPS);
287
288 static void resolve_static_call (CallInfo& result,
289 const LinkInfo& link_info,
290 bool initialize_klass, TRAPS);
291 static void resolve_special_call (CallInfo& result,
292 const LinkInfo& link_info,
293 TRAPS);
294 static void resolve_virtual_call (CallInfo& result, Handle recv, KlassHandle recv_klass,
295 const LinkInfo& link_info,
296 bool check_null_and_abstract, TRAPS);
297 static void resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass,
298 const LinkInfo& link_info,
299 bool check_null_and_abstract, TRAPS);
300 static void resolve_handle_call (CallInfo& result,
301 const LinkInfo& link_info, TRAPS);
302 static void resolve_dynamic_call (CallInfo& result, Handle bootstrap_specifier,
303 Symbol* method_name, Symbol* method_signature,
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