5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
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 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_HPP
27
28 #include "gc_interface/collectedHeap.hpp"
29 #include "memory/genOopClosures.hpp"
30 #include "memory/iterator.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/oop.hpp"
33 #include "runtime/timer.hpp"
34 #include "utilities/growableArray.hpp"
35 #include "utilities/stack.hpp"
36 #include "utilities/taskqueue.hpp"
37
38 class ReferenceProcessor;
39 class DataLayout;
40 class SerialOldTracer;
41 class STWGCTimer;
42
43 // MarkSweep takes care of global mark-compact garbage collection for a
44 // GenCollectedHeap using a four-phase pointer forwarding algorithm. All
45 // generations are assumed to support marking; those that can also support
46 // compaction.
47 //
48 // Class unloading will only occur when a full gc is invoked.
49
50 // declared at end
51 class PreservedMark;
52
53 class MarkSweep : AllStatic {
54 //
55 // Inline closure decls
56 //
178 static void restore_marks(); // Restore the marks that we saved in preserve_mark
179
180 template <class T> static inline void adjust_pointer(T* p);
181 };
182
183 class PreservedMark VALUE_OBJ_CLASS_SPEC {
184 private:
185 oop _obj;
186 markOop _mark;
187
188 public:
189 void init(oop obj, markOop mark) {
190 _obj = obj;
191 _mark = mark;
192 }
193
194 void adjust_pointer();
195 void restore();
196 };
197
198 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_HPP
|
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
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 #ifndef SHARE_VM_GC_SERIAL_MARKSWEEP_HPP
26 #define SHARE_VM_GC_SERIAL_MARKSWEEP_HPP
27
28 #include "gc/shared/collectedHeap.hpp"
29 #include "gc/shared/genOopClosures.hpp"
30 #include "gc/shared/taskqueue.hpp"
31 #include "memory/iterator.hpp"
32 #include "oops/markOop.hpp"
33 #include "oops/oop.hpp"
34 #include "runtime/timer.hpp"
35 #include "utilities/growableArray.hpp"
36 #include "utilities/stack.hpp"
37
38 class ReferenceProcessor;
39 class DataLayout;
40 class SerialOldTracer;
41 class STWGCTimer;
42
43 // MarkSweep takes care of global mark-compact garbage collection for a
44 // GenCollectedHeap using a four-phase pointer forwarding algorithm. All
45 // generations are assumed to support marking; those that can also support
46 // compaction.
47 //
48 // Class unloading will only occur when a full gc is invoked.
49
50 // declared at end
51 class PreservedMark;
52
53 class MarkSweep : AllStatic {
54 //
55 // Inline closure decls
56 //
178 static void restore_marks(); // Restore the marks that we saved in preserve_mark
179
180 template <class T> static inline void adjust_pointer(T* p);
181 };
182
183 class PreservedMark VALUE_OBJ_CLASS_SPEC {
184 private:
185 oop _obj;
186 markOop _mark;
187
188 public:
189 void init(oop obj, markOop mark) {
190 _obj = obj;
191 _mark = mark;
192 }
193
194 void adjust_pointer();
195 void restore();
196 };
197
198 #endif // SHARE_VM_GC_SERIAL_MARKSWEEP_HPP
|