Mercurial > hg > graal-compiler
diff src/share/vm/oops/instanceClassLoaderKlass.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
---|---|
date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | |
children | aed758eda82a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/oops/instanceClassLoaderKlass.hpp Sat Sep 01 13:25:18 2012 -0400 @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2011, 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_OOPS_INSTANCECLASSLOADERKLASS_HPP +#define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP + +#include "oops/instanceKlass.hpp" + +// An instanceClassLoaderKlass is a specialization of the InstanceKlass. It does +// not add any field. It is added to walk the dependencies for the class loader +// key that this class loader points to. This is how the loader_data graph is +// walked and dependant class loaders are kept alive. I thought we walked +// the list later? + +class instanceClassLoaderKlass: public InstanceKlass { + friend class VMStructs; + friend class InstanceKlass; + + // Constructor + instanceClassLoaderKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous) + : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {} + +public: + virtual bool oop_is_instanceClassLoader() const { return true; } + + instanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } + + // Iterators + int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { + return oop_oop_iterate_v(obj, blk); + } + int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { + return oop_oop_iterate_v_m(obj, blk, mr); + } + +#define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ + int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ + int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr); + + ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL) + ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL) + +#ifndef SERIALGC +#define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ + int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); + + ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) + ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) +#endif // !SERIALGC + + // Garbage collection + void oop_follow_contents(oop obj); + + // Parallel Scavenge and Parallel Old + PARALLEL_GC_DECLS +}; + +#endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP