13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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/javaThread.hpp"
38 #include "runtime/synchronizer.hpp"
39 #include "utilities/macros.hpp"
40
41 void oopDesc::print_on(outputStream* st) const {
42 if (*((juint*)this) == badHeapWordVal) {
43 st->print("BAD WORD");
44 } else if (*((juint*)this) == badMetaWordVal) {
45 st->print("BAD META WORD");
46 } else {
47 klass()->oop_print_on(cast_to_oop(this), st);
48 }
49 }
50
51 void oopDesc::print_address_on(outputStream* st) const {
52 st->print("{" PTR_FORMAT "}", p2i(this));
53
54 }
55
56 void oopDesc::print() { print_on(tty); }
95 void oopDesc::verify(oopDesc* oop_desc) {
96 verify_on(tty, oop_desc);
97 }
98
99 intptr_t oopDesc::slow_identity_hash() {
100 // slow case; we have to acquire the micro lock in order to locate the header
101 Thread* current = Thread::current();
102 return ObjectSynchronizer::FastHashCode(current, this);
103 }
104
105 // used only for asserts and guarantees
106 bool oopDesc::is_oop(oop obj, bool ignore_mark_word) {
107 if (!Universe::heap()->is_oop(obj)) {
108 return false;
109 }
110
111 // Header verification: the mark is typically non-zero. If we're
112 // at a safepoint, it must not be zero.
113 // Outside of a safepoint, the header could be changing (for example,
114 // another thread could be inflating a lock on this object).
115 if (ignore_mark_word) {
116 return true;
117 }
118 if (obj->mark().value() != 0) {
119 return true;
120 }
121 return !SafepointSynchronize::is_at_safepoint();
122 }
123
124 // used only for asserts and guarantees
125 bool oopDesc::is_oop_or_null(oop obj, bool ignore_mark_word) {
126 return obj == NULL ? true : is_oop(obj, ignore_mark_word);
127 }
128
129 VerifyOopClosure VerifyOopClosure::verify_oop;
130
131 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
132 oop obj = RawAccess<>::oop_load(p);
133 guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " PTR_FORMAT, p2i(obj));
134 }
135
136 void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); }
137 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
138
139 // type test operations that doesn't require inclusion of oop.inline.hpp.
140 bool oopDesc::is_instance_noinline() const { return is_instance(); }
141 bool oopDesc::is_instanceRef_noinline() const { return is_instanceRef(); }
142 bool oopDesc::is_stackChunk_noinline() const { return is_stackChunk(); }
143 bool oopDesc::is_array_noinline() const { return is_array(); }
144 bool oopDesc::is_objArray_noinline() const { return is_objArray(); }
145 bool oopDesc::is_typeArray_noinline() const { return is_typeArray(); }
146
147 bool oopDesc::has_klass_gap() {
148 // Only has a klass gap when compressed class pointers are used.
149 return UseCompressedClassPointers;
150 }
151
152 #if INCLUDE_CDS_JAVA_HEAP
153 void oopDesc::set_narrow_klass(narrowKlass nk) {
154 assert(DumpSharedSpaces, "Used by CDS only. Do not abuse!");
155 assert(UseCompressedClassPointers, "must be");
156 _metadata._compressed_klass = nk;
157 }
158 #endif
159
160 void* oopDesc::load_klass_raw(oop obj) {
161 if (UseCompressedClassPointers) {
162 narrowKlass narrow_klass = obj->_metadata._compressed_klass;
163 if (narrow_klass == 0) return NULL;
164 return (void*)CompressedKlassPointers::decode_raw(narrow_klass);
165 } else {
166 return obj->_metadata._klass;
167 }
168 }
169
170 void* oopDesc::load_oop_raw(oop obj, int offset) {
171 uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
172 if (UseCompressedOops) {
173 narrowOop narrow_oop = *(narrowOop*)addr;
174 if (CompressedOops::is_null(narrow_oop)) return NULL;
175 return (void*)CompressedOops::decode_raw(narrow_oop);
176 } else {
177 return *(void**)addr;
178 }
179 }
180
181 oop oopDesc::obj_field_acquire(int offset) const { return HeapAccess<MO_ACQUIRE>::oop_load_at(as_oop(), offset); }
182
183 void oopDesc::obj_field_put_raw(int offset, oop value) { RawAccess<>::oop_store_at(as_oop(), offset, value); }
184 void oopDesc::release_obj_field_put(int offset, oop value) { HeapAccess<MO_RELEASE>::oop_store_at(as_oop(), offset, value); }
185 void oopDesc::obj_field_put_volatile(int offset, oop value) { HeapAccess<MO_SEQ_CST>::oop_store_at(as_oop(), offset, value); }
186
187 address oopDesc::address_field(int offset) const { return *field_addr<address>(offset); }
|
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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/compressedKlass.inline.hpp"
34 #include "oops/compressedOops.inline.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "oops/verifyOopClosure.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "runtime/interfaceSupport.inline.hpp"
39 #include "runtime/javaThread.hpp"
40 #include "runtime/synchronizer.hpp"
41 #include "utilities/macros.hpp"
42
43 void oopDesc::print_on(outputStream* st) const {
44 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("{" PTR_FORMAT "}", p2i(this));
55
56 }
57
58 void oopDesc::print() { print_on(tty); }
97 void oopDesc::verify(oopDesc* oop_desc) {
98 verify_on(tty, oop_desc);
99 }
100
101 intptr_t oopDesc::slow_identity_hash() {
102 // slow case; we have to acquire the micro lock in order to locate the header
103 Thread* current = Thread::current();
104 return ObjectSynchronizer::FastHashCode(current, this);
105 }
106
107 // used only for asserts and guarantees
108 bool oopDesc::is_oop(oop obj, bool ignore_mark_word) {
109 if (!Universe::heap()->is_oop(obj)) {
110 return false;
111 }
112
113 // Header verification: the mark is typically non-zero. If we're
114 // at a safepoint, it must not be zero.
115 // Outside of a safepoint, the header could be changing (for example,
116 // another thread could be inflating a lock on this object).
117 if (ignore_mark_word || UseFastLocking) {
118 return true;
119 }
120 if (obj->mark().value() != 0) {
121 return true;
122 }
123 return !SafepointSynchronize::is_at_safepoint();
124 }
125
126 // used only for asserts and guarantees
127 bool oopDesc::is_oop_or_null(oop obj, bool ignore_mark_word) {
128 return obj == NULL ? true : is_oop(obj, ignore_mark_word);
129 }
130
131 VerifyOopClosure VerifyOopClosure::verify_oop;
132
133 template <class T> void VerifyOopClosure::do_oop_work(T* p) {
134 oop obj = RawAccess<>::oop_load(p);
135 guarantee(oopDesc::is_oop_or_null(obj), "invalid oop: " PTR_FORMAT, p2i(obj));
136 }
137
138 void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); }
139 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
140
141 // type test operations that doesn't require inclusion of oop.inline.hpp.
142 bool oopDesc::is_instance_noinline() const { return is_instance(); }
143 bool oopDesc::is_instanceRef_noinline() const { return is_instanceRef(); }
144 bool oopDesc::is_stackChunk_noinline() const { return is_stackChunk(); }
145 bool oopDesc::is_array_noinline() const { return is_array(); }
146 bool oopDesc::is_objArray_noinline() const { return is_objArray(); }
147 bool oopDesc::is_typeArray_noinline() const { return is_typeArray(); }
148
149 void* oopDesc::load_klass_raw(oop obj) {
150 // TODO: Remove method altogether and replace with calls to obj->klass() ?
151 // OTOH, we may eventually get rid of locking in header, and then no
152 // longer have to deal with that anymore.
153 #ifdef _LP64
154 return obj->klass();
155 #else
156 return obj->_klass;
157 #endif
158 }
159
160 void* oopDesc::load_oop_raw(oop obj, int offset) {
161 uintptr_t addr = (uintptr_t)(void*)obj + (uint)offset;
162 if (UseCompressedOops) {
163 narrowOop narrow_oop = *(narrowOop*)addr;
164 if (CompressedOops::is_null(narrow_oop)) return NULL;
165 return (void*)CompressedOops::decode_raw(narrow_oop);
166 } else {
167 return *(void**)addr;
168 }
169 }
170
171 oop oopDesc::obj_field_acquire(int offset) const { return HeapAccess<MO_ACQUIRE>::oop_load_at(as_oop(), offset); }
172
173 void oopDesc::obj_field_put_raw(int offset, oop value) { RawAccess<>::oop_store_at(as_oop(), offset, value); }
174 void oopDesc::release_obj_field_put(int offset, oop value) { HeapAccess<MO_RELEASE>::oop_store_at(as_oop(), offset, value); }
175 void oopDesc::obj_field_put_volatile(int offset, oop value) { HeapAccess<MO_SEQ_CST>::oop_store_at(as_oop(), offset, value); }
176
177 address oopDesc::address_field(int offset) const { return *field_addr<address>(offset); }
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