Mercurial > hg > graal-jvmci-8
view src/share/vm/oops/typeArrayKlass.hpp @ 1091:6aa7255741f3
6906727: UseCompressedOops: some card-marking fixes related to object arrays
Summary: Introduced a new write_ref_array(HeapWords* start, size_t count) method that does the requisite MemRegion range calculation so (some of the) clients of the erstwhile write_ref_array(MemRegion mr) do not need to worry. This removed all external uses of array_size(), which was also simplified and made private. Asserts were added to catch other possible issues. Further, less essential, fixes stemming from this investigation are deferred to CR 6904516 (to follow shortly in hs17).
Reviewed-by: kvn, coleenp, jmasa
author | ysr |
---|---|
date | Thu, 03 Dec 2009 15:01:57 -0800 |
parents | 0fbdb4381b99 |
children | c18cbe5936b8 |
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/* * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // A typeArrayKlass is the klass of a typeArray // It contains the type and size of the elements class typeArrayKlass : public arrayKlass { friend class VMStructs; private: jint _max_length; // maximum number of elements allowed in an array public: // instance variables jint max_length() { return _max_length; } void set_max_length(jint m) { _max_length = m; } // testers bool oop_is_typeArray_slow() const { return true; } // klass allocation DEFINE_ALLOCATE_PERMANENT(typeArrayKlass); static klassOop create_klass(BasicType type, int scale, const char* name_str, TRAPS); static inline klassOop create_klass(BasicType type, int scale, TRAPS) { return create_klass(type, scale, external_name(type), CHECK_NULL); } int oop_size(oop obj) const; int klass_oop_size() const { return object_size(); } bool compute_is_subtype_of(klassOop k); // Allocation typeArrayOop allocate(int length, TRAPS); typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures oop multi_allocate(int rank, jint* sizes, TRAPS); // Copying void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); // Iteration int oop_oop_iterate(oop obj, OopClosure* blk); int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); // Garbage collection void oop_follow_contents(oop obj); int oop_adjust_pointers(oop obj); // Parallel Scavenge and Parallel Old PARALLEL_GC_DECLS protected: // Find n'th dimensional array virtual klassOop array_klass_impl(bool or_null, int n, TRAPS); // Returns the array class with this class as element type virtual klassOop array_klass_impl(bool or_null, TRAPS); public: // Casting from klassOop static typeArrayKlass* cast(klassOop k) { assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass"); return (typeArrayKlass*) k->klass_part(); } // Naming static const char* external_name(BasicType type); // Sizing static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; } int object_size() const { return arrayKlass::object_size(header_size()); } // Initialization (virtual from Klass) void initialize(TRAPS); private: // Helpers static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS); #ifndef PRODUCT public: // Printing void oop_print_on(oop obj, outputStream* st); #endif public: const char* internal_name() const; };