1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/memory/metaspaceShared.hpp Sat Sep 01 13:25:18 2012 -0400
1.3 @@ -0,0 +1,86 @@
1.4 +/*
1.5 + * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +#ifndef SHARE_VM_MEMORY_METASPACE_SHARED_HPP
1.28 +#define SHARE_VM_MEMORY_METASPACE_SHARED_HPP
1.29 +
1.30 +#include "memory/allocation.hpp"
1.31 +#include "memory/memRegion.hpp"
1.32 +#include "runtime/virtualspace.hpp"
1.33 +#include "utilities/exceptions.hpp"
1.34 +#include "utilities/macros.hpp"
1.35 +
1.36 +class FileMapInfo;
1.37 +
1.38 +// Class Data Sharing Support
1.39 +class MetaspaceShared : AllStatic {
1.40 +
1.41 + // CDS support
1.42 + static ReservedSpace* _shared_rs;
1.43 + static int _max_alignment;
1.44 +
1.45 + public:
1.46 + enum {
1.47 + vtbl_list_size = 17, // number of entries in the shared space vtable list.
1.48 + num_virtuals = 200 // maximum number of virtual functions
1.49 + // If virtual functions are added to Metadata,
1.50 + // this number needs to be increased. Also,
1.51 + // SharedMiscCodeSize will need to be increased.
1.52 + };
1.53 +
1.54 + enum {
1.55 + ro = 0, // read-only shared space in the heap
1.56 + rw = 1, // read-write shared space in the heap
1.57 + md = 2, // miscellaneous data for initializing tables, etc.
1.58 + mc = 3, // miscellaneous code - vtable replacement.
1.59 + n_regions = 4
1.60 + };
1.61 +
1.62 + static void set_max_alignment(int alignment) KERNEL_RETURN;
1.63 + static int max_alignment() KERNEL_RETURN_(0);
1.64 +
1.65 + static void preload_and_dump(TRAPS) KERNEL_RETURN;
1.66 + static ReservedSpace* shared_rs();
1.67 + static void set_shared_rs(ReservedSpace* rs) KERNEL_RETURN;
1.68 +
1.69 + static bool map_shared_spaces(FileMapInfo* mapinfo) KERNEL_RETURN_(false);
1.70 + static void initialize_shared_spaces() KERNEL_RETURN;
1.71 +
1.72 + // Return true if given address is in the mapped shared space.
1.73 + static bool is_in_shared_space(const void* p) KERNEL_RETURN_(false);
1.74 +
1.75 + static void generate_vtable_methods(void** vtbl_list,
1.76 + void** vtable,
1.77 + char** md_top, char* md_end,
1.78 + char** mc_top, char* mc_end);
1.79 + static void serialize(SerializeClosure* sc);
1.80 +
1.81 + // JVM/TI RedefineClasses() support:
1.82 + // Remap the shared readonly space to shared readwrite, private if
1.83 + // sharing is enabled. Simply returns true if sharing is not enabled
1.84 + // or if the remapping has already been done by a prior call.
1.85 + static bool remap_shared_readonly_as_readwrite() KERNEL_RETURN_(true);
1.86 +
1.87 + static void print_shared_spaces();
1.88 +};
1.89 +#endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP
