111 char* low() const {
112 return _vs.low();
113 }
114 char* alloc_top() const {
115 return _alloc_top;
116 }
117 char* alloc(size_t num_bytes) NOT_CDS_RETURN_(NULL);
118 };
119
120 // Class Data Sharing Support
121 class MetaspaceShared : AllStatic {
122
123 // CDS support
124 static ReservedSpace* _shared_rs;
125 static int _max_alignment;
126 static MetaspaceSharedStats _stats;
127 static bool _link_classes_made_progress;
128 static bool _check_classes_made_progress;
129 static bool _has_error_classes;
130 static bool _archive_loading_failed;
131
132 // Used only during dumping.
133 static SharedMiscRegion _md;
134 static SharedMiscRegion _mc;
135 public:
136 enum {
137 vtbl_list_size = DEFAULT_VTBL_LIST_SIZE,
138 num_virtuals = DEFAULT_VTBL_VIRTUALS_COUNT,
139 vtbl_method_size = DEFAULT_VTBL_METHOD_SIZE,
140 vtbl_common_code_size = DEFAULT_VTBL_COMMON_CODE_SIZE
141 };
142
143 enum {
144 ro = 0, // read-only shared space in the heap
145 rw = 1, // read-write shared space in the heap
146 md = 2, // miscellaneous data for initializing tables, etc.
147 mc = 3, // miscellaneous code - vtable replacement.
148 max_strings = 2, // max number of string regions in string space
149 num_non_strings = 4, // number of non-string regions
150 first_string = num_non_strings, // index of first string region
200 // JVM/TI RedefineClasses() support:
201 // Remap the shared readonly space to shared readwrite, private if
202 // sharing is enabled. Simply returns true if sharing is not enabled
203 // or if the remapping has already been done by a prior call.
204 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
205
206 static void print_shared_spaces();
207
208 static bool try_link_class(InstanceKlass* ik, TRAPS);
209 static void link_one_shared_class(Klass* obj, TRAPS);
210 static void check_one_shared_class(Klass* obj);
211 static void link_and_cleanup_shared_classes(TRAPS);
212
213 static int count_class(const char* classlist_file);
214 static void estimate_regions_size() NOT_CDS_RETURN;
215
216 // Allocate a block of memory from the "mc" or "md" regions.
217 static char* misc_code_space_alloc(size_t num_bytes) { return _mc.alloc(num_bytes); }
218 static char* misc_data_space_alloc(size_t num_bytes) { return _md.alloc(num_bytes); }
219
220 static SharedMiscRegion* misc_code_region() {
221 assert(DumpSharedSpaces, "used during dumping only");
222 return &_mc;
223 }
224 static SharedMiscRegion* misc_data_region() {
225 assert(DumpSharedSpaces, "used during dumping only");
226 return &_md;
227 }
228 };
229 #endif // SHARE_VM_MEMORY_METASPACESHARED_HPP
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111 char* low() const {
112 return _vs.low();
113 }
114 char* alloc_top() const {
115 return _alloc_top;
116 }
117 char* alloc(size_t num_bytes) NOT_CDS_RETURN_(NULL);
118 };
119
120 // Class Data Sharing Support
121 class MetaspaceShared : AllStatic {
122
123 // CDS support
124 static ReservedSpace* _shared_rs;
125 static int _max_alignment;
126 static MetaspaceSharedStats _stats;
127 static bool _link_classes_made_progress;
128 static bool _check_classes_made_progress;
129 static bool _has_error_classes;
130 static bool _archive_loading_failed;
131 static address _cds_i2i_entry_code_buffers;
132 static size_t _cds_i2i_entry_code_buffers_size;
133
134 // Used only during dumping.
135 static SharedMiscRegion _md;
136 static SharedMiscRegion _mc;
137 public:
138 enum {
139 vtbl_list_size = DEFAULT_VTBL_LIST_SIZE,
140 num_virtuals = DEFAULT_VTBL_VIRTUALS_COUNT,
141 vtbl_method_size = DEFAULT_VTBL_METHOD_SIZE,
142 vtbl_common_code_size = DEFAULT_VTBL_COMMON_CODE_SIZE
143 };
144
145 enum {
146 ro = 0, // read-only shared space in the heap
147 rw = 1, // read-write shared space in the heap
148 md = 2, // miscellaneous data for initializing tables, etc.
149 mc = 3, // miscellaneous code - vtable replacement.
150 max_strings = 2, // max number of string regions in string space
151 num_non_strings = 4, // number of non-string regions
152 first_string = num_non_strings, // index of first string region
202 // JVM/TI RedefineClasses() support:
203 // Remap the shared readonly space to shared readwrite, private if
204 // sharing is enabled. Simply returns true if sharing is not enabled
205 // or if the remapping has already been done by a prior call.
206 static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
207
208 static void print_shared_spaces();
209
210 static bool try_link_class(InstanceKlass* ik, TRAPS);
211 static void link_one_shared_class(Klass* obj, TRAPS);
212 static void check_one_shared_class(Klass* obj);
213 static void link_and_cleanup_shared_classes(TRAPS);
214
215 static int count_class(const char* classlist_file);
216 static void estimate_regions_size() NOT_CDS_RETURN;
217
218 // Allocate a block of memory from the "mc" or "md" regions.
219 static char* misc_code_space_alloc(size_t num_bytes) { return _mc.alloc(num_bytes); }
220 static char* misc_data_space_alloc(size_t num_bytes) { return _md.alloc(num_bytes); }
221
222 static address cds_i2i_entry_code_buffers(size_t total_size);
223
224 static address cds_i2i_entry_code_buffers() {
225 return _cds_i2i_entry_code_buffers;
226 }
227 static size_t cds_i2i_entry_code_buffers_size() {
228 return _cds_i2i_entry_code_buffers_size;
229 }
230
231 static SharedMiscRegion* misc_code_region() {
232 assert(DumpSharedSpaces, "used during dumping only");
233 return &_mc;
234 }
235 static SharedMiscRegion* misc_data_region() {
236 assert(DumpSharedSpaces, "used during dumping only");
237 return &_md;
238 }
239 };
240 #endif // SHARE_VM_MEMORY_METASPACESHARED_HPP
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