114 // Is this object guaranteed to be in the permanent part of the heap?
115 // If so, CollectedHeap::can_elide_permanent_oop_store_barriers is relevant.
116 // If the answer is false, no guarantees are made.
117 bool is_perm() { return (_ident & PERM_FLAG) != 0; }
118
119 // Might this object possibly move during a scavenge operation?
120 // If the answer is true and ScavengeRootsInCode==0, the oop cannot be embedded in code.
121 bool is_scavengable() { return (_ident & SCAVENGABLE_FLAG) != 0; }
122
123 // The address which the compiler should embed into the
124 // generated code to represent this oop. This address
125 // is not the true address of the oop -- it will get patched
126 // during nmethod creation.
127 //
128 // Usage note: no address arithmetic allowed. Oop must
129 // be registered with the oopRecorder.
130 jobject constant_encoding();
131
132 // What kind of ciObject is this?
133 virtual bool is_null_object() const { return false; }
134 virtual bool is_instance() { return false; }
135 virtual bool is_method() { return false; }
136 virtual bool is_method_data() { return false; }
137 virtual bool is_array() { return false; }
138 virtual bool is_obj_array() { return false; }
139 virtual bool is_type_array() { return false; }
140 virtual bool is_symbol() { return false; }
141 virtual bool is_type() { return false; }
142 virtual bool is_return_address() { return false; }
143 virtual bool is_klass() { return false; }
144 virtual bool is_instance_klass() { return false; }
145 virtual bool is_method_klass() { return false; }
146 virtual bool is_array_klass() { return false; }
147 virtual bool is_obj_array_klass() { return false; }
148 virtual bool is_type_array_klass() { return false; }
149 virtual bool is_symbol_klass() { return false; }
150 virtual bool is_klass_klass() { return false; }
151 virtual bool is_instance_klass_klass() { return false; }
152 virtual bool is_array_klass_klass() { return false; }
153 virtual bool is_obj_array_klass_klass() { return false; }
168 // Is this ciObject the ciInstanceKlass representing
169 // java.lang.Object()?
170 virtual bool is_java_lang_Object() { return false; }
171
172 // Does this ciObject refer to a real oop in the VM?
173 //
174 // Note: some ciObjects refer to oops which have yet to be
175 // created. We refer to these as "unloaded". Specifically,
176 // there are unloaded ciMethods, ciObjArrayKlasses, and
177 // ciInstanceKlasses. By convention the ciNullObject is
178 // considered loaded, and primitive types are considered loaded.
179 bool is_loaded() const {
180 return handle() != NULL || is_classless();
181 }
182
183 // Subclass casting with assertions.
184 ciNullObject* as_null_object() {
185 assert(is_null_object(), "bad cast");
186 return (ciNullObject*)this;
187 }
188 ciInstance* as_instance() {
189 assert(is_instance(), "bad cast");
190 return (ciInstance*)this;
191 }
192 ciMethod* as_method() {
193 assert(is_method(), "bad cast");
194 return (ciMethod*)this;
195 }
196 ciMethodData* as_method_data() {
197 assert(is_method_data(), "bad cast");
198 return (ciMethodData*)this;
199 }
200 ciArray* as_array() {
201 assert(is_array(), "bad cast");
202 return (ciArray*)this;
203 }
204 ciObjArray* as_obj_array() {
205 assert(is_obj_array(), "bad cast");
206 return (ciObjArray*)this;
207 }
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114 // Is this object guaranteed to be in the permanent part of the heap?
115 // If so, CollectedHeap::can_elide_permanent_oop_store_barriers is relevant.
116 // If the answer is false, no guarantees are made.
117 bool is_perm() { return (_ident & PERM_FLAG) != 0; }
118
119 // Might this object possibly move during a scavenge operation?
120 // If the answer is true and ScavengeRootsInCode==0, the oop cannot be embedded in code.
121 bool is_scavengable() { return (_ident & SCAVENGABLE_FLAG) != 0; }
122
123 // The address which the compiler should embed into the
124 // generated code to represent this oop. This address
125 // is not the true address of the oop -- it will get patched
126 // during nmethod creation.
127 //
128 // Usage note: no address arithmetic allowed. Oop must
129 // be registered with the oopRecorder.
130 jobject constant_encoding();
131
132 // What kind of ciObject is this?
133 virtual bool is_null_object() const { return false; }
134 virtual bool is_cpcache() const { return false; }
135 virtual bool is_instance() { return false; }
136 virtual bool is_method() { return false; }
137 virtual bool is_method_data() { return false; }
138 virtual bool is_array() { return false; }
139 virtual bool is_obj_array() { return false; }
140 virtual bool is_type_array() { return false; }
141 virtual bool is_symbol() { return false; }
142 virtual bool is_type() { return false; }
143 virtual bool is_return_address() { return false; }
144 virtual bool is_klass() { return false; }
145 virtual bool is_instance_klass() { return false; }
146 virtual bool is_method_klass() { return false; }
147 virtual bool is_array_klass() { return false; }
148 virtual bool is_obj_array_klass() { return false; }
149 virtual bool is_type_array_klass() { return false; }
150 virtual bool is_symbol_klass() { return false; }
151 virtual bool is_klass_klass() { return false; }
152 virtual bool is_instance_klass_klass() { return false; }
153 virtual bool is_array_klass_klass() { return false; }
154 virtual bool is_obj_array_klass_klass() { return false; }
169 // Is this ciObject the ciInstanceKlass representing
170 // java.lang.Object()?
171 virtual bool is_java_lang_Object() { return false; }
172
173 // Does this ciObject refer to a real oop in the VM?
174 //
175 // Note: some ciObjects refer to oops which have yet to be
176 // created. We refer to these as "unloaded". Specifically,
177 // there are unloaded ciMethods, ciObjArrayKlasses, and
178 // ciInstanceKlasses. By convention the ciNullObject is
179 // considered loaded, and primitive types are considered loaded.
180 bool is_loaded() const {
181 return handle() != NULL || is_classless();
182 }
183
184 // Subclass casting with assertions.
185 ciNullObject* as_null_object() {
186 assert(is_null_object(), "bad cast");
187 return (ciNullObject*)this;
188 }
189 ciCPCache* as_cpcache() {
190 assert(is_cpcache(), "bad cast");
191 return (ciCPCache*) this;
192 }
193 ciInstance* as_instance() {
194 assert(is_instance(), "bad cast");
195 return (ciInstance*)this;
196 }
197 ciMethod* as_method() {
198 assert(is_method(), "bad cast");
199 return (ciMethod*)this;
200 }
201 ciMethodData* as_method_data() {
202 assert(is_method_data(), "bad cast");
203 return (ciMethodData*)this;
204 }
205 ciArray* as_array() {
206 assert(is_array(), "bad cast");
207 return (ciArray*)this;
208 }
209 ciObjArray* as_obj_array() {
210 assert(is_obj_array(), "bad cast");
211 return (ciObjArray*)this;
212 }
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