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 #ifndef SHARE_VM_MEMORY_METASPACE_SHARED_HPP
25 #define SHARE_VM_MEMORY_METASPACE_SHARED_HPP
26
27 #include "memory/allocation.hpp"
28 #include "memory/memRegion.hpp"
29 #include "runtime/virtualspace.hpp"
30 #include "utilities/exceptions.hpp"
31 #include "utilities/macros.hpp"
32
33 #define LargeSharedArchiveSize (300*M)
34 #define HugeSharedArchiveSize (800*M)
35 #define ReadOnlyRegionPercentage 0.4
36 #define ReadWriteRegionPercentage 0.55
37 #define MiscDataRegionPercentage 0.03
38 #define MiscCodeRegionPercentage 0.02
39 #define LargeThresholdClassCount 5000
40 #define HugeThresholdClassCount 40000
41
42 #define SET_ESTIMATED_SIZE(type, region) \
43 Shared ##region## Size = FLAG_IS_DEFAULT(Shared ##region## Size) ? \
44 (uintx)(type ## SharedArchiveSize * region ## RegionPercentage) : Shared ## region ## Size
45
46 class FileMapInfo;
47
48 // Class Data Sharing Support
49 class MetaspaceShared : AllStatic {
50
51 // CDS support
52 static ReservedSpace* _shared_rs;
53 static int _max_alignment;
54 static bool _link_classes_made_progress;
55 static bool _check_classes_made_progress;
56 static bool _has_error_classes;
57 static bool _archive_loading_failed;
58 public:
59 enum {
60 vtbl_list_size = 17, // number of entries in the shared space vtable list.
61 num_virtuals = 200, // maximum number of virtual functions
62 // If virtual functions are added to Metadata,
63 // this number needs to be increased. Also,
64 // SharedMiscCodeSize will need to be increased.
65 // The following 2 sizes were based on
66 // MetaspaceShared::generate_vtable_methods()
67 vtbl_method_size = 16, // conservative size of the mov1 and jmp instructions
68 // for the x64 platform
69 vtbl_common_code_size = (1*K) // conservative size of the "common_code" for the x64 platform
70 };
71
72 enum {
73 ro = 0, // read-only shared space in the heap
100 }
101
102 static void set_shared_rs(ReservedSpace* rs) {
103 CDS_ONLY(_shared_rs = rs;)
104 }
105
106 static void set_archive_loading_failed() {
107 _archive_loading_failed = true;
108 }
109 static bool map_shared_spaces(FileMapInfo* mapinfo) NOT_CDS_RETURN_(false);
110 static void initialize_shared_spaces() NOT_CDS_RETURN;
111
112 // Return true if given address is in the mapped shared space.
113 static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false);
114
115 static void generate_vtable_methods(void** vtbl_list,
116 void** vtable,
117 char** md_top, char* md_end,
118 char** mc_top, char* mc_end);
119 static void serialize(SerializeClosure* sc);
120
121 // JVM/TI RedefineClasses() support:
122 // Remap the shared readonly space to shared readwrite, private if
123 // sharing is enabled. Simply returns true if sharing is not enabled
124 // or if the remapping has already been done by a prior call.
125 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
126
127 static void print_shared_spaces();
128
129 static bool try_link_class(InstanceKlass* ik, TRAPS);
130 static void link_one_shared_class(Klass* obj, TRAPS);
131 static void check_one_shared_class(Klass* obj);
132 static void link_and_cleanup_shared_classes(TRAPS);
133
134 static int count_class(const char* classlist_file);
135 static void estimate_regions_size() NOT_CDS_RETURN;
136 };
137 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP
|
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 #ifndef SHARE_VM_MEMORY_METASPACE_SHARED_HPP
25 #define SHARE_VM_MEMORY_METASPACE_SHARED_HPP
26
27 #include "classfile/compactHashtable.hpp"
28 #include "memory/allocation.hpp"
29 #include "memory/memRegion.hpp"
30 #include "runtime/virtualspace.hpp"
31 #include "utilities/exceptions.hpp"
32 #include "utilities/macros.hpp"
33
34 #define LargeSharedArchiveSize (300*M)
35 #define HugeSharedArchiveSize (800*M)
36 #define ReadOnlyRegionPercentage 0.4
37 #define ReadWriteRegionPercentage 0.55
38 #define MiscDataRegionPercentage 0.03
39 #define MiscCodeRegionPercentage 0.02
40 #define LargeThresholdClassCount 5000
41 #define HugeThresholdClassCount 40000
42
43 #define SET_ESTIMATED_SIZE(type, region) \
44 Shared ##region## Size = FLAG_IS_DEFAULT(Shared ##region## Size) ? \
45 (uintx)(type ## SharedArchiveSize * region ## RegionPercentage) : Shared ## region ## Size
46
47 class FileMapInfo;
48
49 class MetaspaceSharedStats VALUE_OBJ_CLASS_SPEC {
50 public:
51 MetaspaceSharedStats() {
52 memset(this, 0, sizeof(*this));
53 }
54 CompactHashtableStats symbol;
55 };
56
57 // Class Data Sharing Support
58 class MetaspaceShared : AllStatic {
59
60 // CDS support
61 static ReservedSpace* _shared_rs;
62 static int _max_alignment;
63 static MetaspaceSharedStats _stats;
64 static bool _link_classes_made_progress;
65 static bool _check_classes_made_progress;
66 static bool _has_error_classes;
67 static bool _archive_loading_failed;
68 public:
69 enum {
70 vtbl_list_size = 17, // number of entries in the shared space vtable list.
71 num_virtuals = 200, // maximum number of virtual functions
72 // If virtual functions are added to Metadata,
73 // this number needs to be increased. Also,
74 // SharedMiscCodeSize will need to be increased.
75 // The following 2 sizes were based on
76 // MetaspaceShared::generate_vtable_methods()
77 vtbl_method_size = 16, // conservative size of the mov1 and jmp instructions
78 // for the x64 platform
79 vtbl_common_code_size = (1*K) // conservative size of the "common_code" for the x64 platform
80 };
81
82 enum {
83 ro = 0, // read-only shared space in the heap
110 }
111
112 static void set_shared_rs(ReservedSpace* rs) {
113 CDS_ONLY(_shared_rs = rs;)
114 }
115
116 static void set_archive_loading_failed() {
117 _archive_loading_failed = true;
118 }
119 static bool map_shared_spaces(FileMapInfo* mapinfo) NOT_CDS_RETURN_(false);
120 static void initialize_shared_spaces() NOT_CDS_RETURN;
121
122 // Return true if given address is in the mapped shared space.
123 static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false);
124
125 static void generate_vtable_methods(void** vtbl_list,
126 void** vtable,
127 char** md_top, char* md_end,
128 char** mc_top, char* mc_end);
129 static void serialize(SerializeClosure* sc);
130
131 static MetaspaceSharedStats* stats() {
132 return &_stats;
133 }
134
135 // JVM/TI RedefineClasses() support:
136 // Remap the shared readonly space to shared readwrite, private if
137 // sharing is enabled. Simply returns true if sharing is not enabled
138 // or if the remapping has already been done by a prior call.
139 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
140
141 static void print_shared_spaces();
142
143 static bool try_link_class(InstanceKlass* ik, TRAPS);
144 static void link_one_shared_class(Klass* obj, TRAPS);
145 static void check_one_shared_class(Klass* obj);
146 static void link_and_cleanup_shared_classes(TRAPS);
147
148 static int count_class(const char* classlist_file);
149 static void estimate_regions_size() NOT_CDS_RETURN;
150 };
151 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP
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