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_MEMORY_METASPACESHARED_HPP
26 #define SHARE_VM_MEMORY_METASPACESHARED_HPP
27
28 #include "classfile/compactHashtable.hpp"
29 #include "memory/allocation.hpp"
30 #include "memory/memRegion.hpp"
31 #include "memory/virtualspace.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "utilities/exceptions.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/resourceHash.hpp"
36
37 #define MAX_SHARED_DELTA (0x7FFFFFFF)
38
39 class FileMapInfo;
40
41 class MetaspaceSharedStats {
42 public:
43 MetaspaceSharedStats() {
44 memset(this, 0, sizeof(*this));
45 }
46 CompactHashtableStats symbol;
47 CompactHashtableStats string;
48 };
49
50 // Class Data Sharing Support
51 class MetaspaceShared : AllStatic {
52
79 // mapped java heap regions
80 first_string = od + 1, // index of first string region
81 max_strings = 2, // max number of string regions in string space
82 first_open_archive_heap_region = first_string + max_strings,
83 max_open_archive_heap_region = 2,
84
85 last_valid_region = first_open_archive_heap_region + max_open_archive_heap_region - 1,
86 n_regions = last_valid_region + 1 // total number of regions
87 };
88
89 static void prepare_for_dumping() NOT_CDS_RETURN;
90 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
91 static int preload_classes(const char * class_list_path,
92 TRAPS) NOT_CDS_RETURN_(0);
93
94 #if INCLUDE_CDS_JAVA_HEAP
95 private:
96 static bool obj_equals(oop const& p1, oop const& p2) {
97 return p1 == p2;
98 }
99 static unsigned obj_hash(oop const& p) {
100 assert(!p->mark()->has_bias_pattern(),
101 "this object should never have been locked"); // so identity_hash won't safepoin
102 unsigned hash = (unsigned)p->identity_hash();
103 return hash;
104 }
105 typedef ResourceHashtable<oop, oop,
106 MetaspaceShared::obj_hash,
107 MetaspaceShared::obj_equals,
108 15889, // prime number
109 ResourceObj::C_HEAP> ArchivedObjectCache;
110 static ArchivedObjectCache* _archive_object_cache;
111
112 public:
113 static ArchivedObjectCache* archive_object_cache() {
114 return _archive_object_cache;
115 }
116 static oop find_archived_heap_object(oop obj);
117 static oop archive_heap_object(oop obj, Thread* THREAD);
118 static void archive_klass_objects(Thread* THREAD);
119 #endif
120 static bool is_heap_object_archiving_allowed() {
121 CDS_JAVA_HEAP_ONLY(return (UseG1GC && UseCompressedOops && UseCompressedClassPointers);)
122 NOT_CDS_JAVA_HEAP(return false;)
123 }
124 static void create_archive_object_cache() {
|
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_MEMORY_METASPACESHARED_HPP
26 #define SHARE_VM_MEMORY_METASPACESHARED_HPP
27
28 #include "classfile/compactHashtable.hpp"
29 #include "memory/allocation.hpp"
30 #include "memory/memRegion.hpp"
31 #include "memory/virtualspace.hpp"
32 #include "oops/oop.hpp"
33 #include "utilities/exceptions.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/resourceHash.hpp"
36
37 #define MAX_SHARED_DELTA (0x7FFFFFFF)
38
39 class FileMapInfo;
40
41 class MetaspaceSharedStats {
42 public:
43 MetaspaceSharedStats() {
44 memset(this, 0, sizeof(*this));
45 }
46 CompactHashtableStats symbol;
47 CompactHashtableStats string;
48 };
49
50 // Class Data Sharing Support
51 class MetaspaceShared : AllStatic {
52
79 // mapped java heap regions
80 first_string = od + 1, // index of first string region
81 max_strings = 2, // max number of string regions in string space
82 first_open_archive_heap_region = first_string + max_strings,
83 max_open_archive_heap_region = 2,
84
85 last_valid_region = first_open_archive_heap_region + max_open_archive_heap_region - 1,
86 n_regions = last_valid_region + 1 // total number of regions
87 };
88
89 static void prepare_for_dumping() NOT_CDS_RETURN;
90 static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
91 static int preload_classes(const char * class_list_path,
92 TRAPS) NOT_CDS_RETURN_(0);
93
94 #if INCLUDE_CDS_JAVA_HEAP
95 private:
96 static bool obj_equals(oop const& p1, oop const& p2) {
97 return p1 == p2;
98 }
99 static unsigned obj_hash(oop const& p);
100
101 typedef ResourceHashtable<oop, oop,
102 MetaspaceShared::obj_hash,
103 MetaspaceShared::obj_equals,
104 15889, // prime number
105 ResourceObj::C_HEAP> ArchivedObjectCache;
106 static ArchivedObjectCache* _archive_object_cache;
107
108 public:
109 static ArchivedObjectCache* archive_object_cache() {
110 return _archive_object_cache;
111 }
112 static oop find_archived_heap_object(oop obj);
113 static oop archive_heap_object(oop obj, Thread* THREAD);
114 static void archive_klass_objects(Thread* THREAD);
115 #endif
116 static bool is_heap_object_archiving_allowed() {
117 CDS_JAVA_HEAP_ONLY(return (UseG1GC && UseCompressedOops && UseCompressedClassPointers);)
118 NOT_CDS_JAVA_HEAP(return false;)
119 }
120 static void create_archive_object_cache() {
|