< prev index next >

src/hotspot/share/oops/oop.cpp

Print this page

 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "classfile/altHashing.hpp"
 27 #include "classfile/javaClasses.inline.hpp"
 28 #include "gc/shared/collectedHeap.inline.hpp"
 29 #include "gc/shared/gc_globals.hpp"
 30 #include "memory/resourceArea.hpp"
 31 #include "memory/universe.hpp"
 32 #include "oops/access.inline.hpp"
 33 #include "oops/compressedOops.inline.hpp"
 34 #include "oops/oop.inline.hpp"
 35 #include "oops/verifyOopClosure.hpp"
 36 #include "runtime/handles.inline.hpp"
 37 #include "runtime/thread.inline.hpp"
 38 #include "utilities/copy.hpp"
 39 #include "utilities/macros.hpp"
 40 
 41 void oopDesc::print_on(outputStream* st) const {
 42   klass()->oop_print_on(const_cast<oopDesc*>(this), st);








 43 }
 44 
 45 void oopDesc::print_address_on(outputStream* st) const {
 46   st->print("{" INTPTR_FORMAT "}", p2i(this));
 47 
 48 }
 49 
 50 void oopDesc::print()         { print_on(tty);         }
 51 
 52 void oopDesc::print_address() { print_address_on(tty); }
 53 
 54 char* oopDesc::print_string() {
 55   stringStream st;
 56   print_on(&st);
 57   return st.as_string();
 58 }
 59 
 60 void oopDesc::print_value() {
 61   print_value_on(tty);
 62 }
 63 
 64 char* oopDesc::print_value_string() {
 65   char buf[100];
 66   stringStream st(buf, sizeof(buf));
 67   print_value_on(&st);
 68   return st.as_string();
 69 }
 70 
 71 void oopDesc::print_value_on(outputStream* st) const {
 72   oop obj = const_cast<oopDesc*>(this);
 73   if (java_lang_String::is_instance(obj)) {
 74     java_lang_String::print(obj, st);
 75     print_address_on(st);
 76   } else {
 77     klass()->oop_print_value_on(obj, st);






 78   }
 79 }
 80 
 81 
 82 void oopDesc::verify_on(outputStream* st, oopDesc* oop_desc) {
 83   if (oop_desc != NULL) {
 84     oop_desc->klass()->oop_verify_on(oop_desc, st);
 85   }
 86 }
 87 
 88 
 89 void oopDesc::verify(oopDesc* oop_desc) {
 90   verify_on(tty, oop_desc);
 91 }
 92 
 93 intptr_t oopDesc::slow_identity_hash() {
 94   // slow case; we have to acquire the micro lock in order to locate the header
 95   Thread* current = Thread::current();
 96   ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
 97   HandleMark hm(current);

121 // used only for asserts and guarantees
122 bool oopDesc::is_oop_or_null(oop obj, bool ignore_mark_word) {
123   return obj == NULL ? true : is_oop(obj, ignore_mark_word);
124 }
125 
126 VerifyOopClosure VerifyOopClosure::verify_oop;
127 
128 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
129   oop obj = RawAccess<>::oop_load(p);
130   guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " INTPTR_FORMAT, p2i((oopDesc*) obj));
131 }
132 
133 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
134 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
135 
136 // type test operations that doesn't require inclusion of oop.inline.hpp.
137 bool oopDesc::is_instance_noinline()          const { return is_instance();            }
138 bool oopDesc::is_array_noinline()             const { return is_array();               }
139 bool oopDesc::is_objArray_noinline()          const { return is_objArray();            }
140 bool oopDesc::is_typeArray_noinline()         const { return is_typeArray();           }

141 
142 bool oopDesc::has_klass_gap() {
143   // Only has a klass gap when compressed class pointers are used.
144   return UseCompressedClassPointers;
145 }
146 
147 #if INCLUDE_CDS_JAVA_HEAP
148 void oopDesc::set_narrow_klass(narrowKlass nk) {
149   assert(DumpSharedSpaces, "Used by CDS only. Do not abuse!");
150   assert(UseCompressedClassPointers, "must be");
151   _metadata._compressed_klass = nk;
152 }
153 #endif
154 
155 void* oopDesc::load_klass_raw(oop obj) {
156   if (UseCompressedClassPointers) {
157     narrowKlass narrow_klass = obj->_metadata._compressed_klass;
158     if (narrow_klass == 0) return NULL;
159     return (void*)CompressedKlassPointers::decode_raw(narrow_klass);
160   } else {

206 jshort oopDesc::short_field_acquire(int offset) const                 { return Atomic::load_acquire(field_addr<jshort>(offset)); }
207 void oopDesc::release_short_field_put(int offset, jshort value)       { Atomic::release_store(field_addr<jshort>(offset), value); }
208 
209 jlong oopDesc::long_field_acquire(int offset) const                   { return Atomic::load_acquire(field_addr<jlong>(offset)); }
210 void oopDesc::release_long_field_put(int offset, jlong value)         { Atomic::release_store(field_addr<jlong>(offset), value); }
211 
212 jfloat oopDesc::float_field_acquire(int offset) const                 { return Atomic::load_acquire(field_addr<jfloat>(offset)); }
213 void oopDesc::release_float_field_put(int offset, jfloat value)       { Atomic::release_store(field_addr<jfloat>(offset), value); }
214 
215 jdouble oopDesc::double_field_acquire(int offset) const               { return Atomic::load_acquire(field_addr<jdouble>(offset)); }
216 void oopDesc::release_double_field_put(int offset, jdouble value)     { Atomic::release_store(field_addr<jdouble>(offset), value); }
217 
218 #ifdef ASSERT
219 void oopDesc::verify_forwardee(oop forwardee) {
220 #if INCLUDE_CDS_JAVA_HEAP
221   assert(!Universe::heap()->is_archived_object(forwardee) && !Universe::heap()->is_archived_object(this),
222          "forwarding archive object");
223 #endif
224 }
225 
226 bool oopDesc::get_UseParallelGC() { return UseParallelGC; }
227 bool oopDesc::get_UseG1GC()       { return UseG1GC;       }






228 #endif

 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "classfile/altHashing.hpp"
 27 #include "classfile/javaClasses.inline.hpp"
 28 #include "gc/shared/collectedHeap.inline.hpp"
 29 #include "gc/shared/gc_globals.hpp"
 30 #include "memory/resourceArea.hpp"
 31 #include "memory/universe.hpp"
 32 #include "oops/access.inline.hpp"
 33 #include "oops/compressedOops.inline.hpp"
 34 #include "oops/oop.inline.hpp"
 35 #include "oops/verifyOopClosure.hpp"
 36 #include "runtime/handles.inline.hpp"
 37 #include "runtime/thread.inline.hpp"
 38 #include "utilities/copy.hpp"
 39 #include "utilities/macros.hpp"
 40 
 41 void oopDesc::print_on(outputStream* st) const {
 42   if (this == NULL) {
 43     st->print_cr("NULL");
 44   } else if (*((juint*)this) == badHeapWordVal) {
 45     st->print("BAD WORD");
 46   } else if (*((juint*)this) == badMetaWordVal) {
 47     st->print("BAD META WORD");
 48   } else {
 49     klass()->oop_print_on(cast_to_oop(this), st);
 50   }
 51 }
 52 
 53 void oopDesc::print_address_on(outputStream* st) const {
 54   st->print("{" INTPTR_FORMAT "}", p2i(this));
 55 
 56 }
 57 
 58 void oopDesc::print()         { print_on(tty);         }
 59 
 60 void oopDesc::print_address() { print_address_on(tty); }
 61 
 62 char* oopDesc::print_string() {
 63   stringStream st;
 64   print_on(&st);
 65   return st.as_string();
 66 }
 67 
 68 void oopDesc::print_value() {
 69   print_value_on(tty);
 70 }
 71 
 72 char* oopDesc::print_value_string() {
 73   char buf[100];
 74   stringStream st(buf, sizeof(buf));
 75   print_value_on(&st);
 76   return st.as_string();
 77 }
 78 
 79 void oopDesc::print_value_on(outputStream* st) const {
 80   if (this == NULL) {
 81     st->print("NULL");


 82   } else {
 83     oop obj = cast_to_oop(this);
 84     if (java_lang_String::is_instance(obj)) {
 85       java_lang_String::print(obj, st);
 86       print_address_on(st);
 87     } else {
 88       klass()->oop_print_value_on(obj, st);
 89     }
 90   }
 91 }
 92 
 93 
 94 void oopDesc::verify_on(outputStream* st, oopDesc* oop_desc) {
 95   if (oop_desc != NULL) {
 96     oop_desc->klass()->oop_verify_on(oop_desc, st);
 97   }
 98 }
 99 
100 
101 void oopDesc::verify(oopDesc* oop_desc) {
102   verify_on(tty, oop_desc);
103 }
104 
105 intptr_t oopDesc::slow_identity_hash() {
106   // slow case; we have to acquire the micro lock in order to locate the header
107   Thread* current = Thread::current();
108   ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
109   HandleMark hm(current);

133 // used only for asserts and guarantees
134 bool oopDesc::is_oop_or_null(oop obj, bool ignore_mark_word) {
135   return obj == NULL ? true : is_oop(obj, ignore_mark_word);
136 }
137 
138 VerifyOopClosure VerifyOopClosure::verify_oop;
139 
140 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
141   oop obj = RawAccess<>::oop_load(p);
142   guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " INTPTR_FORMAT, p2i((oopDesc*) obj));
143 }
144 
145 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }
146 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
147 
148 // type test operations that doesn't require inclusion of oop.inline.hpp.
149 bool oopDesc::is_instance_noinline()          const { return is_instance();            }
150 bool oopDesc::is_array_noinline()             const { return is_array();               }
151 bool oopDesc::is_objArray_noinline()          const { return is_objArray();            }
152 bool oopDesc::is_typeArray_noinline()         const { return is_typeArray();           }
153 bool oopDesc::is_stackChunk_noinline()        const { return is_stackChunk();          }
154 
155 bool oopDesc::has_klass_gap() {
156   // Only has a klass gap when compressed class pointers are used.
157   return UseCompressedClassPointers;
158 }
159 
160 #if INCLUDE_CDS_JAVA_HEAP
161 void oopDesc::set_narrow_klass(narrowKlass nk) {
162   assert(DumpSharedSpaces, "Used by CDS only. Do not abuse!");
163   assert(UseCompressedClassPointers, "must be");
164   _metadata._compressed_klass = nk;
165 }
166 #endif
167 
168 void* oopDesc::load_klass_raw(oop obj) {
169   if (UseCompressedClassPointers) {
170     narrowKlass narrow_klass = obj->_metadata._compressed_klass;
171     if (narrow_klass == 0) return NULL;
172     return (void*)CompressedKlassPointers::decode_raw(narrow_klass);
173   } else {

219 jshort oopDesc::short_field_acquire(int offset) const                 { return Atomic::load_acquire(field_addr<jshort>(offset)); }
220 void oopDesc::release_short_field_put(int offset, jshort value)       { Atomic::release_store(field_addr<jshort>(offset), value); }
221 
222 jlong oopDesc::long_field_acquire(int offset) const                   { return Atomic::load_acquire(field_addr<jlong>(offset)); }
223 void oopDesc::release_long_field_put(int offset, jlong value)         { Atomic::release_store(field_addr<jlong>(offset), value); }
224 
225 jfloat oopDesc::float_field_acquire(int offset) const                 { return Atomic::load_acquire(field_addr<jfloat>(offset)); }
226 void oopDesc::release_float_field_put(int offset, jfloat value)       { Atomic::release_store(field_addr<jfloat>(offset), value); }
227 
228 jdouble oopDesc::double_field_acquire(int offset) const               { return Atomic::load_acquire(field_addr<jdouble>(offset)); }
229 void oopDesc::release_double_field_put(int offset, jdouble value)     { Atomic::release_store(field_addr<jdouble>(offset), value); }
230 
231 #ifdef ASSERT
232 void oopDesc::verify_forwardee(oop forwardee) {
233 #if INCLUDE_CDS_JAVA_HEAP
234   assert(!Universe::heap()->is_archived_object(forwardee) && !Universe::heap()->is_archived_object(this),
235          "forwarding archive object");
236 #endif
237 }
238 
239 bool oopDesc::size_might_change() {
240   // UseParallelGC and UseG1GC can change the length field
241   // of an "old copy" of an object array in the young gen so it indicates
242   // the grey portion of an already copied array. This will cause the first
243   // disjunct below to fail if the two comparands are computed across such
244   // a concurrent change.
245   return Universe::heap()->is_gc_active() && is_objArray() && is_forwarded() && (UseParallelGC || UseG1GC);
246 }
247 #endif
< prev index next >