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src/hotspot/share/oops/oop.cpp

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141 VerifyOopClosure VerifyOopClosure::verify_oop;
142 
143 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
144   oop obj = RawAccess<>::oop_load(p);
145   guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " PTR_FORMAT, p2i(obj));
146 }
147 
148 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
149 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
150 
151 // type test operations that doesn't require inclusion of oop.inline.hpp.
152 bool oopDesc::is_instance_noinline()    const { return is_instance();    }
153 bool oopDesc::is_instanceRef_noinline() const { return is_instanceRef(); }
154 bool oopDesc::is_stackChunk_noinline()  const { return is_stackChunk();  }
155 bool oopDesc::is_array_noinline()       const { return is_array();       }
156 bool oopDesc::is_objArray_noinline()    const { return is_objArray();    }
157 bool oopDesc::is_typeArray_noinline()   const { return is_typeArray();   }
158 
159 bool oopDesc::has_klass_gap() {
160   // Only has a klass gap when compressed class pointers are used.
161   return UseCompressedClassPointers;

162 }
163 
164 #if INCLUDE_CDS_JAVA_HEAP
165 void oopDesc::set_narrow_klass(narrowKlass nk) {
166   assert(CDSConfig::is_dumping_heap(), "Used by CDS only. Do not abuse!");
167   assert(UseCompressedClassPointers, "must be");
168   _metadata._compressed_klass = nk;
169 }
170 #endif
171 
172 void* oopDesc::load_klass_raw(oop obj) {
173   if (UseCompressedClassPointers) {


174     narrowKlass narrow_klass = obj->_metadata._compressed_klass;
175     if (narrow_klass == 0) return nullptr;
176     return (void*)CompressedKlassPointers::decode_raw(narrow_klass);
177   } else {
178     return obj->_metadata._klass;
179   }
180 }
181 
182 void* oopDesc::load_oop_raw(oop obj, int offset) {
183   uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
184   if (UseCompressedOops) {
185     narrowOop narrow_oop = *(narrowOop*)addr;
186     if (CompressedOops::is_null(narrow_oop)) return nullptr;
187     return (void*)CompressedOops::decode_raw(narrow_oop);
188   } else {
189     return *(void**)addr;
190   }
191 }
192 
193 oop oopDesc::obj_field_acquire(int offset) const                      { return HeapAccess<MO_ACQUIRE>::oop_load_at(as_oop(), offset); }

141 VerifyOopClosure VerifyOopClosure::verify_oop;
142 
143 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
144   oop obj = RawAccess<>::oop_load(p);
145   guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " PTR_FORMAT, p2i(obj));
146 }
147 
148 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
149 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
150 
151 // type test operations that doesn't require inclusion of oop.inline.hpp.
152 bool oopDesc::is_instance_noinline()    const { return is_instance();    }
153 bool oopDesc::is_instanceRef_noinline() const { return is_instanceRef(); }
154 bool oopDesc::is_stackChunk_noinline()  const { return is_stackChunk();  }
155 bool oopDesc::is_array_noinline()       const { return is_array();       }
156 bool oopDesc::is_objArray_noinline()    const { return is_objArray();    }
157 bool oopDesc::is_typeArray_noinline()   const { return is_typeArray();   }
158 
159 bool oopDesc::has_klass_gap() {
160   // Only has a klass gap when compressed class pointers are used.
161   // Except when using compact headers.
162   return UseCompressedClassPointers && !UseCompactObjectHeaders;
163 }
164 
165 #if INCLUDE_CDS_JAVA_HEAP
166 void oopDesc::set_narrow_klass(narrowKlass nk) {
167   assert(CDSConfig::is_dumping_heap(), "Used by CDS only. Do not abuse!");
168   assert(UseCompressedClassPointers, "must be");
169   _metadata._compressed_klass = nk;
170 }
171 #endif
172 
173 void* oopDesc::load_klass_raw(oop obj) {
174   if (UseCompactObjectHeaders) {
175     return obj->klass();
176   } else if (UseCompressedClassPointers) {
177     narrowKlass narrow_klass = obj->_metadata._compressed_klass;
178     if (narrow_klass == 0) return nullptr;
179     return (void*)CompressedKlassPointers::decode_raw(narrow_klass);
180   } else {
181     return obj->_metadata._klass;
182   }
183 }
184 
185 void* oopDesc::load_oop_raw(oop obj, int offset) {
186   uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
187   if (UseCompressedOops) {
188     narrowOop narrow_oop = *(narrowOop*)addr;
189     if (CompressedOops::is_null(narrow_oop)) return nullptr;
190     return (void*)CompressedOops::decode_raw(narrow_oop);
191   } else {
192     return *(void**)addr;
193   }
194 }
195 
196 oop oopDesc::obj_field_acquire(int offset) const                      { return HeapAccess<MO_ACQUIRE>::oop_load_at(as_oop(), offset); }
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