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src/hotspot/share/oops/oop.cpp

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113 bool oopDesc::is_oop(oop obj) {
114   return Universe::heap()->is_oop(obj);
115 }
116 
117 // used only for asserts and guarantees
118 bool oopDesc::is_oop_or_null(oop obj) {
119   return obj == nullptr ? true : is_oop(obj);
120 }
121 
122 VerifyOopClosure VerifyOopClosure::verify_oop;
123 
124 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
125   oop obj = RawAccess<>::oop_load(p);
126   guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " PTR_FORMAT, p2i(obj));
127 }
128 
129 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
130 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
131 
132 // type test operations that doesn't require inclusion of oop.inline.hpp.
133 bool oopDesc::is_instance_noinline()    const { return is_instance();    }
134 bool oopDesc::is_instanceRef_noinline() const { return is_instanceRef(); }
135 bool oopDesc::is_stackChunk_noinline()  const { return is_stackChunk();  }
136 bool oopDesc::is_array_noinline()       const { return is_array();       }
137 bool oopDesc::is_objArray_noinline()    const { return is_objArray();    }
138 bool oopDesc::is_typeArray_noinline()   const { return is_typeArray();   }



139 
140 #if INCLUDE_CDS_JAVA_HEAP
141 void oopDesc::set_narrow_klass(narrowKlass nk) {
142   assert(CDSConfig::is_dumping_heap(), "Used by CDS only. Do not abuse!");
143   assert(UseCompressedClassPointers, "must be");
144   _metadata._compressed_klass = nk;
145 }
146 #endif
147 
148 void* oopDesc::load_oop_raw(oop obj, int offset) {
149   uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
150   if (UseCompressedOops) {
151     narrowOop narrow_oop = *(narrowOop*)addr;
152     if (CompressedOops::is_null(narrow_oop)) return nullptr;
153     return (void*)CompressedOops::decode_raw(narrow_oop);
154   } else {
155     return *(void**)addr;
156   }
157 }
158 

113 bool oopDesc::is_oop(oop obj) {
114   return Universe::heap()->is_oop(obj);
115 }
116 
117 // used only for asserts and guarantees
118 bool oopDesc::is_oop_or_null(oop obj) {
119   return obj == nullptr ? true : is_oop(obj);
120 }
121 
122 VerifyOopClosure VerifyOopClosure::verify_oop;
123 
124 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
125   oop obj = RawAccess<>::oop_load(p);
126   guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " PTR_FORMAT, p2i(obj));
127 }
128 
129 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
130 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
131 
132 // type test operations that doesn't require inclusion of oop.inline.hpp.
133 bool oopDesc::is_instance_noinline()        const { return is_instance();         }
134 bool oopDesc::is_instanceRef_noinline()     const { return is_instanceRef();      }
135 bool oopDesc::is_stackChunk_noinline()      const { return is_stackChunk();       }
136 bool oopDesc::is_array_noinline()           const { return is_array();            }
137 bool oopDesc::is_objArray_noinline()        const { return is_objArray();         }
138 bool oopDesc::is_refArray_noinline()        const { return is_refArray();         }
139 bool oopDesc::is_typeArray_noinline()       const { return is_typeArray();        }
140 bool oopDesc::is_flatArray_noinline()       const { return is_flatArray();        }
141 bool oopDesc::is_null_free_array_noinline() const { return is_null_free_array();  }
142 
143 #if INCLUDE_CDS_JAVA_HEAP
144 void oopDesc::set_narrow_klass(narrowKlass nk) {
145   assert(CDSConfig::is_dumping_heap(), "Used by CDS only. Do not abuse!");
146   assert(UseCompressedClassPointers, "must be");
147   _metadata._compressed_klass = nk;
148 }
149 #endif
150 
151 void* oopDesc::load_oop_raw(oop obj, int offset) {
152   uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
153   if (UseCompressedOops) {
154     narrowOop narrow_oop = *(narrowOop*)addr;
155     if (CompressedOops::is_null(narrow_oop)) return nullptr;
156     return (void*)CompressedOops::decode_raw(narrow_oop);
157   } else {
158     return *(void**)addr;
159   }
160 }
161 
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