--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/memory/metaspaceShared.hpp Sat Sep 01 13:25:18 2012 -0400
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+#ifndef SHARE_VM_MEMORY_METASPACE_SHARED_HPP
+#define SHARE_VM_MEMORY_METASPACE_SHARED_HPP
+
+#include "memory/allocation.hpp"
+#include "memory/memRegion.hpp"
+#include "runtime/virtualspace.hpp"
+#include "utilities/exceptions.hpp"
+#include "utilities/macros.hpp"
+
+class FileMapInfo;
+
+// Class Data Sharing Support
+class MetaspaceShared : AllStatic {
+
+ // CDS support
+ static ReservedSpace* _shared_rs;
+ static int _max_alignment;
+
+ public:
+ enum {
+ vtbl_list_size = 17, // number of entries in the shared space vtable list.
+ num_virtuals = 200 // maximum number of virtual functions
+ // If virtual functions are added to Metadata,
+ // this number needs to be increased. Also,
+ // SharedMiscCodeSize will need to be increased.
+ };
+
+ enum {
+ ro = 0, // read-only shared space in the heap
+ rw = 1, // read-write shared space in the heap
+ md = 2, // miscellaneous data for initializing tables, etc.
+ mc = 3, // miscellaneous code - vtable replacement.
+ n_regions = 4
+ };
+
+ static void set_max_alignment(int alignment) KERNEL_RETURN;
+ static int max_alignment() KERNEL_RETURN_(0);
+
+ static void preload_and_dump(TRAPS) KERNEL_RETURN;
+ static ReservedSpace* shared_rs();
+ static void set_shared_rs(ReservedSpace* rs) KERNEL_RETURN;
+
+ static bool map_shared_spaces(FileMapInfo* mapinfo) KERNEL_RETURN_(false);
+ static void initialize_shared_spaces() KERNEL_RETURN;
+
+ // Return true if given address is in the mapped shared space.
+ static bool is_in_shared_space(const void* p) KERNEL_RETURN_(false);
+
+ static void generate_vtable_methods(void** vtbl_list,
+ void** vtable,
+ char** md_top, char* md_end,
+ char** mc_top, char* mc_end);
+ static void serialize(SerializeClosure* sc);
+
+ // JVM/TI RedefineClasses() support:
+ // Remap the shared readonly space to shared readwrite, private if
+ // sharing is enabled. Simply returns true if sharing is not enabled
+ // or if the remapping has already been done by a prior call.
+ static bool remap_shared_readonly_as_readwrite() KERNEL_RETURN_(true);
+
+ static void print_shared_spaces();
+};
+#endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP