Mercurial > hg > graal-compiler
view src/share/vm/oops/instanceRefKlass.hpp @ 14561:e14198669e5c
Make data patch system use vm specific NarrowOop kind.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 17 Mar 2014 11:53:51 +0100 |
parents | de6a9e811145 |
children | 4ca6dc0799b6 |
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/* * Copyright (c) 1997, 2013, 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_INSTANCEREFKLASS_HPP #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP #include "oops/instanceKlass.hpp" #include "utilities/macros.hpp" // An InstanceRefKlass is a specialized InstanceKlass for Java // classes that are subclasses of java/lang/ref/Reference. // // These classes are used to implement soft/weak/final/phantom // references and finalization, and need special treatment by the // garbage collector. // // During GC discovered reference objects are added (chained) to one // of the four lists below, depending on the type of reference. // The linked occurs through the next field in class java/lang/ref/Reference. // // Afterwards, the discovered references are processed in decreasing // order of reachability. Reference objects eligible for notification // are linked to the static pending_list in class java/lang/ref/Reference, // and the pending list lock object in the same class is notified. class InstanceRefKlass: public InstanceKlass { friend class InstanceKlass; // Constructor InstanceRefKlass(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: InstanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } // Type testing bool oop_is_instanceRef() const { return true; } // Casting from Klass* static InstanceRefKlass* cast(Klass* k) { assert(k->oop_is_instanceRef(), "cast to InstanceRefKlass"); return (InstanceRefKlass*) k; } // Garbage collection int oop_adjust_pointers(oop obj); void oop_follow_contents(oop obj); // Parallel Scavenge and Parallel Old PARALLEL_GC_DECLS 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 InstanceRefKlass_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(InstanceRefKlass_OOP_OOP_ITERATE_DECL) ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL) #if INCLUDE_ALL_GCS #define InstanceRefKlass_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(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) #endif // INCLUDE_ALL_GCS static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock); static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock); static bool owns_pending_list_lock(JavaThread* thread); // Update non-static oop maps so 'referent', 'nextPending' and // 'discovered' will look like non-oops static void update_nonstatic_oop_maps(Klass* k); public: // Verification void oop_verify_on(oop obj, outputStream* st); }; #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP