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 class FileMapInfo; 34 35 // Class Data Sharing Support 36 class MetaspaceShared : AllStatic { 37 38 // CDS support 39 static ReservedSpace* _shared_rs; 40 static int _max_alignment; 41 static bool _link_classes_made_progress; 42 static bool _check_classes_made_progress; 43 static bool _has_error_classes; 44 static bool _archive_loading_failed; 45 public: 46 enum { 47 vtbl_list_size = 17, // number of entries in the shared space vtable list. 48 num_virtuals = 200 // maximum number of virtual functions 49 // If virtual functions are added to Metadata, 50 // this number needs to be increased. Also, 51 // SharedMiscCodeSize will need to be increased. 52 }; 95 static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false); 96 97 static void generate_vtable_methods(void** vtbl_list, 98 void** vtable, 99 char** md_top, char* md_end, 100 char** mc_top, char* mc_end); 101 static void serialize(SerializeClosure* sc); 102 103 // JVM/TI RedefineClasses() support: 104 // Remap the shared readonly space to shared readwrite, private if 105 // sharing is enabled. Simply returns true if sharing is not enabled 106 // or if the remapping has already been done by a prior call. 107 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true); 108 109 static void print_shared_spaces(); 110 111 static bool try_link_class(InstanceKlass* ik, TRAPS); 112 static void link_one_shared_class(Klass* obj, TRAPS); 113 static void check_one_shared_class(Klass* obj); 114 static void link_and_cleanup_shared_classes(TRAPS); 115 }; 116 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP | 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 (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 }; 108 static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false); 109 110 static void generate_vtable_methods(void** vtbl_list, 111 void** vtable, 112 char** md_top, char* md_end, 113 char** mc_top, char* mc_end); 114 static void serialize(SerializeClosure* sc); 115 116 // JVM/TI RedefineClasses() support: 117 // Remap the shared readonly space to shared readwrite, private if 118 // sharing is enabled. Simply returns true if sharing is not enabled 119 // or if the remapping has already been done by a prior call. 120 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true); 121 122 static void print_shared_spaces(); 123 124 static bool try_link_class(InstanceKlass* ik, TRAPS); 125 static void link_one_shared_class(Klass* obj, TRAPS); 126 static void check_one_shared_class(Klass* obj); 127 static void link_and_cleanup_shared_classes(TRAPS); 128 129 static int count_class(const char* classlist_file); 130 static void estimate_regions_size() NOT_CDS_RETURN; 131 }; 132 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP |