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/*
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* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_objArrayKlass.cpp.incl"
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int objArrayKlass::oop_size(oop obj) const {
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assert(obj->is_objArray(), "must be object array");
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return objArrayOop(obj)->object_size();
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}
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objArrayOop objArrayKlass::allocate(int length, TRAPS) {
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if (length >= 0) {
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if (length <= arrayOopDesc::max_array_length(T_OBJECT)) {
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int size = objArrayOopDesc::object_size(length);
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KlassHandle h_k(THREAD, as_klassOop());
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objArrayOop a = (objArrayOop)CollectedHeap::array_allocate(h_k, size, length, CHECK_NULL);
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assert(a->is_parsable(), "Can't publish unless parsable");
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return a;
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} else {
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THROW_OOP_0(Universe::out_of_memory_error_array_size());
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}
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} else {
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THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
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}
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}
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static int multi_alloc_counter = 0;
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oop objArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
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int length = *sizes;
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// Call to lower_dimension uses this pointer, so most be called before a
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// possible GC
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KlassHandle h_lower_dimension(THREAD, lower_dimension());
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// If length < 0 allocate will throw an exception.
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objArrayOop array = allocate(length, CHECK_NULL);
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assert(array->is_parsable(), "Don't handlize unless parsable");
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objArrayHandle h_array (THREAD, array);
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if (rank > 1) {
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if (length != 0) {
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for (int index = 0; index < length; index++) {
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arrayKlass* ak = arrayKlass::cast(h_lower_dimension());
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oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL);
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assert(sub_array->is_parsable(), "Don't publish until parsable");
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h_array->obj_at_put(index, sub_array);
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}
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} else {
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// Since this array dimension has zero length, nothing will be
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// allocated, however the lower dimension values must be checked
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// for illegal values.
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for (int i = 0; i < rank - 1; ++i) {
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sizes += 1;
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if (*sizes < 0) {
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THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
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}
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}
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}
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}
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return h_array();
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}
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void objArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d,
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int dst_pos, int length, TRAPS) {
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assert(s->is_objArray(), "must be obj array");
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if (!d->is_objArray()) {
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THROW(vmSymbols::java_lang_ArrayStoreException());
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}
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// Check is all offsets and lengths are non negative
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if (src_pos < 0 || dst_pos < 0 || length < 0) {
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THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
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}
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// Check if the ranges are valid
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if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
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|| (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
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THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
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}
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// Special case. Boundary cases must be checked first
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// This allows the following call: copy_array(s, s.length(), d.length(), 0).
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// This is correct, since the position is supposed to be an 'in between point', i.e., s.length(),
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// points to the right of the last element.
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if (length==0) {
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return;
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}
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oop* const src = objArrayOop(s)->obj_at_addr(src_pos);
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oop* const dst = objArrayOop(d)->obj_at_addr(dst_pos);
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const size_t word_len = length * HeapWordsPerOop;
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// For performance reasons, we assume we are using a card marking write
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// barrier. The assert will fail if this is not the case.
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BarrierSet* bs = Universe::heap()->barrier_set();
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assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
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if (s == d) {
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// since source and destination are equal we do not need conversion checks.
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assert(length > 0, "sanity check");
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Copy::conjoint_oops_atomic(src, dst, length);
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} else {
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// We have to make sure all elements conform to the destination array
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klassOop bound = objArrayKlass::cast(d->klass())->element_klass();
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klassOop stype = objArrayKlass::cast(s->klass())->element_klass();
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if (stype == bound || Klass::cast(stype)->is_subtype_of(bound)) {
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// elements are guaranteed to be subtypes, so no check necessary
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Copy::conjoint_oops_atomic(src, dst, length);
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} else {
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// slow case: need individual subtype checks
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// note: don't use obj_at_put below because it includes a redundant store check
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oop* from = src;
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oop* end = from + length;
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for (oop* p = dst; from < end; from++, p++) {
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oop element = *from;
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if (element == NULL || Klass::cast(element->klass())->is_subtype_of(bound)) {
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*p = element;
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} else {
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// We must do a barrier to cover the partial copy.
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const size_t done_word_len = pointer_delta(p, dst, oopSize) *
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HeapWordsPerOop;
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bs->write_ref_array(MemRegion((HeapWord*)dst, done_word_len));
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THROW(vmSymbols::java_lang_ArrayStoreException());
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return;
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}
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}
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}
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}
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bs->write_ref_array(MemRegion((HeapWord*)dst, word_len));
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}
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klassOop objArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
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objArrayKlassHandle h_this(THREAD, as_klassOop());
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return array_klass_impl(h_this, or_null, n, CHECK_NULL);
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}
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klassOop objArrayKlass::array_klass_impl(objArrayKlassHandle this_oop, bool or_null, int n, TRAPS) {
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assert(this_oop->dimension() <= n, "check order of chain");
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int dimension = this_oop->dimension();
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if (dimension == n)
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return this_oop();
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objArrayKlassHandle ak (THREAD, this_oop->higher_dimension());
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if (ak.is_null()) {
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if (or_null) return NULL;
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ResourceMark rm;
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JavaThread *jt = (JavaThread *)THREAD;
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{
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MutexLocker mc(Compile_lock, THREAD); // for vtables
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// Ensure atomic creation of higher dimensions
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MutexLocker mu(MultiArray_lock, THREAD);
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// Check if another thread beat us
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ak = objArrayKlassHandle(THREAD, this_oop->higher_dimension());
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if( ak.is_null() ) {
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// Create multi-dim klass object and link them together
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klassOop new_klass =
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objArrayKlassKlass::cast(Universe::objArrayKlassKlassObj())->
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allocate_objArray_klass(dimension + 1, this_oop, CHECK_NULL);
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ak = objArrayKlassHandle(THREAD, new_klass);
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this_oop->set_higher_dimension(ak());
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ak->set_lower_dimension(this_oop());
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assert(ak->oop_is_objArray(), "incorrect initialization of objArrayKlass");
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}
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}
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} else {
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CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
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}
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if (or_null) {
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return ak->array_klass_or_null(n);
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}
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return ak->array_klass(n, CHECK_NULL);
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}
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klassOop objArrayKlass::array_klass_impl(bool or_null, TRAPS) {
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return array_klass_impl(or_null, dimension() + 1, CHECK_NULL);
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}
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bool objArrayKlass::can_be_primary_super_slow() const {
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if (!bottom_klass()->klass_part()->can_be_primary_super())
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// array of interfaces
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return false;
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else
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return Klass::can_be_primary_super_slow();
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}
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objArrayOop objArrayKlass::compute_secondary_supers(int num_extra_slots, TRAPS) {
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// interfaces = { cloneable_klass, serializable_klass, elemSuper[], ... };
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objArrayOop es = Klass::cast(element_klass())->secondary_supers();
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objArrayHandle elem_supers (THREAD, es);
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int num_elem_supers = elem_supers.is_null() ? 0 : elem_supers->length();
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int num_secondaries = num_extra_slots + 2 + num_elem_supers;
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if (num_secondaries == 2) {
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// Must share this for correct bootstrapping!
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return Universe::the_array_interfaces_array();
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} else {
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objArrayOop sec_oop = oopFactory::new_system_objArray(num_secondaries, CHECK_NULL);
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objArrayHandle secondaries(THREAD, sec_oop);
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secondaries->obj_at_put(num_extra_slots+0, SystemDictionary::cloneable_klass());
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secondaries->obj_at_put(num_extra_slots+1, SystemDictionary::serializable_klass());
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for (int i = 0; i < num_elem_supers; i++) {
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klassOop elem_super = (klassOop) elem_supers->obj_at(i);
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klassOop array_super = elem_super->klass_part()->array_klass_or_null();
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assert(array_super != NULL, "must already have been created");
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secondaries->obj_at_put(num_extra_slots+2+i, array_super);
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}
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return secondaries();
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}
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}
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bool objArrayKlass::compute_is_subtype_of(klassOop k) {
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if (!k->klass_part()->oop_is_objArray())
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return arrayKlass::compute_is_subtype_of(k);
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objArrayKlass* oak = objArrayKlass::cast(k);
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return element_klass()->klass_part()->is_subtype_of(oak->element_klass());
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}
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void objArrayKlass::initialize(TRAPS) {
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Klass::cast(bottom_klass())->initialize(THREAD); // dispatches to either instanceKlass or typeArrayKlass
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}
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void objArrayKlass::oop_follow_contents(oop obj) {
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assert (obj->is_array(), "obj must be array");
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arrayOop a = arrayOop(obj);
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a->follow_header();
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oop* base = (oop*)a->base(T_OBJECT);
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oop* const end = base + a->length();
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while (base < end) {
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if (*base != NULL)
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// we call mark_and_follow here to avoid excessive marking stack usage
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MarkSweep::mark_and_follow(base);
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base++;
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}
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}
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#ifndef SERIALGC
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void objArrayKlass::oop_follow_contents(ParCompactionManager* cm,
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oop obj) {
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assert (obj->is_array(), "obj must be array");
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arrayOop a = arrayOop(obj);
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a->follow_header(cm);
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oop* base = (oop*)a->base(T_OBJECT);
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oop* const end = base + a->length();
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while (base < end) {
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if (*base != NULL)
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// we call mark_and_follow here to avoid excessive marking stack usage
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PSParallelCompact::mark_and_follow(cm, base);
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base++;
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}
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}
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#endif // SERIALGC
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#define invoke_closure_on(base, closure, nv_suffix) { \
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if (*(base) != NULL) { \
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(closure)->do_oop##nv_suffix(base); \
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} \
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}
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#define ObjArrayKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
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\
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int objArrayKlass::oop_oop_iterate##nv_suffix(oop obj, \
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OopClosureType* closure) { \
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SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
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assert (obj->is_array(), "obj must be array"); \
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objArrayOop a = objArrayOop(obj); \
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/* Get size before changing pointers. */ \
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/* Don't call size() or oop_size() since that is a virtual call. */ \
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int size = a->object_size(); \
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if (closure->do_header()) { \
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a->oop_iterate_header(closure); \
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} \
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oop* base = a->base(); \
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oop* const end = base + a->length(); \
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const intx field_offset = PrefetchFieldsAhead; \
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if (field_offset > 0) { \
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while (base < end) { \
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prefetch_beyond(base, end, field_offset, closure->prefetch_style()); \
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invoke_closure_on(base, closure, nv_suffix); \
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base++; \
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} \
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} else { \
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while (base < end) { \
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invoke_closure_on(base, closure, nv_suffix); \
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base++; \
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} \
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} \
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return size; \
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}
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#define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \
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\
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int objArrayKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \
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OopClosureType* closure, \
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MemRegion mr) { \
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SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
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assert(obj->is_array(), "obj must be array"); \
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objArrayOop a = objArrayOop(obj); \
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/* Get size before changing pointers. */ \
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/* Don't call size() or oop_size() since that is a virtual call */ \
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int size = a->object_size(); \
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if (closure->do_header()) { \
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a->oop_iterate_header(closure, mr); \
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} \
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oop* bottom = (oop*)mr.start(); \
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oop* top = (oop*)mr.end(); \
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oop* base = a->base(); \
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oop* end = base + a->length(); \
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if (base < bottom) { \
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base = bottom; \
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} \
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if (end > top) { \
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end = top; \
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} \
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const intx field_offset = PrefetchFieldsAhead; \
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if (field_offset > 0) { \
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while (base < end) { \
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prefetch_beyond(base, end, field_offset, closure->prefetch_style()); \
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invoke_closure_on(base, closure, nv_suffix); \
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base++; \
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} \
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} else { \
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while (base < end) { \
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invoke_closure_on(base, closure, nv_suffix); \
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base++; \
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} \
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} \
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return size; \
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}
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ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN)
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ALL_OOP_OOP_ITERATE_CLOSURES_3(ObjArrayKlass_OOP_OOP_ITERATE_DEFN)
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ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m)
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ALL_OOP_OOP_ITERATE_CLOSURES_3(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m)
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int objArrayKlass::oop_adjust_pointers(oop obj) {
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assert(obj->is_objArray(), "obj must be obj array");
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objArrayOop a = objArrayOop(obj);
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// Get size before changing pointers.
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368 |
// Don't call size() or oop_size() since that is a virtual call.
|
|
369 |
int size = a->object_size();
|
|
370 |
a->adjust_header();
|
|
371 |
oop* base = a->base();
|
|
372 |
oop* const end = base + a->length();
|
|
373 |
while (base < end) {
|
|
374 |
MarkSweep::adjust_pointer(base);
|
|
375 |
base++;
|
|
376 |
}
|
|
377 |
return size;
|
|
378 |
}
|
|
379 |
|
|
380 |
#ifndef SERIALGC
|
|
381 |
void objArrayKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) {
|
|
382 |
assert(!pm->depth_first(), "invariant");
|
|
383 |
assert(obj->is_objArray(), "obj must be obj array");
|
|
384 |
// Compute oop range
|
|
385 |
oop* curr = objArrayOop(obj)->base();
|
|
386 |
oop* end = curr + objArrayOop(obj)->length();
|
|
387 |
// assert(align_object_size(end - (oop*)obj) == oop_size(obj), "checking size");
|
|
388 |
assert(align_object_size(pointer_delta(end, obj, sizeof(oop*)))
|
|
389 |
== oop_size(obj), "checking size");
|
|
390 |
|
|
391 |
// Iterate over oops
|
|
392 |
while (curr < end) {
|
|
393 |
if (PSScavenge::should_scavenge(*curr)) {
|
|
394 |
pm->claim_or_forward_breadth(curr);
|
|
395 |
}
|
|
396 |
++curr;
|
|
397 |
}
|
|
398 |
}
|
|
399 |
|
|
400 |
void objArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
|
|
401 |
assert(pm->depth_first(), "invariant");
|
|
402 |
assert(obj->is_objArray(), "obj must be obj array");
|
|
403 |
// Compute oop range
|
|
404 |
oop* curr = objArrayOop(obj)->base();
|
|
405 |
oop* end = curr + objArrayOop(obj)->length();
|
|
406 |
// assert(align_object_size(end - (oop*)obj) == oop_size(obj), "checking size");
|
|
407 |
assert(align_object_size(pointer_delta(end, obj, sizeof(oop*)))
|
|
408 |
== oop_size(obj), "checking size");
|
|
409 |
|
|
410 |
// Iterate over oops
|
|
411 |
while (curr < end) {
|
|
412 |
if (PSScavenge::should_scavenge(*curr)) {
|
|
413 |
pm->claim_or_forward_depth(curr);
|
|
414 |
}
|
|
415 |
++curr;
|
|
416 |
}
|
|
417 |
}
|
|
418 |
|
|
419 |
int objArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
|
|
420 |
assert (obj->is_objArray(), "obj must be obj array");
|
|
421 |
objArrayOop a = objArrayOop(obj);
|
|
422 |
|
|
423 |
oop* const base = a->base();
|
|
424 |
oop* const beg_oop = base;
|
|
425 |
oop* const end_oop = base + a->length();
|
|
426 |
for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
|
|
427 |
PSParallelCompact::adjust_pointer(cur_oop);
|
|
428 |
}
|
|
429 |
return a->object_size();
|
|
430 |
}
|
|
431 |
|
|
432 |
int objArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
|
|
433 |
HeapWord* beg_addr, HeapWord* end_addr) {
|
|
434 |
assert (obj->is_objArray(), "obj must be obj array");
|
|
435 |
objArrayOop a = objArrayOop(obj);
|
|
436 |
|
|
437 |
oop* const base = a->base();
|
|
438 |
oop* const beg_oop = MAX2((oop*)beg_addr, base);
|
|
439 |
oop* const end_oop = MIN2((oop*)end_addr, base + a->length());
|
|
440 |
for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
|
|
441 |
PSParallelCompact::adjust_pointer(cur_oop);
|
|
442 |
}
|
|
443 |
return a->object_size();
|
|
444 |
}
|
|
445 |
#endif // SERIALGC
|
|
446 |
|
|
447 |
// JVM support
|
|
448 |
|
|
449 |
jint objArrayKlass::compute_modifier_flags(TRAPS) const {
|
|
450 |
// The modifier for an objectArray is the same as its element
|
|
451 |
if (element_klass() == NULL) {
|
|
452 |
assert(Universe::is_bootstrapping(), "partial objArray only at startup");
|
|
453 |
return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
|
|
454 |
}
|
|
455 |
// Recurse down the element list
|
|
456 |
jint element_flags = Klass::cast(element_klass())->compute_modifier_flags(CHECK_0);
|
|
457 |
|
|
458 |
return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED))
|
|
459 |
| (JVM_ACC_ABSTRACT | JVM_ACC_FINAL);
|
|
460 |
}
|
|
461 |
|
|
462 |
|
|
463 |
#ifndef PRODUCT
|
|
464 |
// Printing
|
|
465 |
|
|
466 |
void objArrayKlass::oop_print_on(oop obj, outputStream* st) {
|
|
467 |
arrayKlass::oop_print_on(obj, st);
|
|
468 |
assert(obj->is_objArray(), "must be objArray");
|
|
469 |
objArrayOop oa = objArrayOop(obj);
|
|
470 |
int print_len = MIN2((intx) oa->length(), MaxElementPrintSize);
|
|
471 |
for(int index = 0; index < print_len; index++) {
|
|
472 |
st->print(" - %3d : ", index);
|
|
473 |
oa->obj_at(index)->print_value_on(st);
|
|
474 |
st->cr();
|
|
475 |
}
|
|
476 |
int remaining = oa->length() - print_len;
|
|
477 |
if (remaining > 0) {
|
|
478 |
tty->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining);
|
|
479 |
}
|
|
480 |
}
|
|
481 |
|
|
482 |
|
|
483 |
void objArrayKlass::oop_print_value_on(oop obj, outputStream* st) {
|
|
484 |
assert(obj->is_objArray(), "must be objArray");
|
|
485 |
element_klass()->print_value_on(st);
|
|
486 |
st->print("a [%d] ", objArrayOop(obj)->length());
|
|
487 |
as_klassOop()->klass()->print_value_on(st);
|
|
488 |
}
|
|
489 |
|
|
490 |
#endif // PRODUCT
|
|
491 |
|
|
492 |
const char* objArrayKlass::internal_name() const {
|
|
493 |
return external_name();
|
|
494 |
}
|
|
495 |
|
|
496 |
// Verification
|
|
497 |
|
|
498 |
void objArrayKlass::oop_verify_on(oop obj, outputStream* st) {
|
|
499 |
arrayKlass::oop_verify_on(obj, st);
|
|
500 |
guarantee(obj->is_objArray(), "must be objArray");
|
|
501 |
objArrayOop oa = objArrayOop(obj);
|
|
502 |
for(int index = 0; index < oa->length(); index++) {
|
|
503 |
guarantee(oa->obj_at(index)->is_oop_or_null(), "should be oop");
|
|
504 |
}
|
|
505 |
}
|
|
506 |
|
|
507 |
void objArrayKlass::oop_verify_old_oop(oop obj, oop* p, bool allow_dirty) {
|
|
508 |
/* $$$ move into remembered set verification?
|
|
509 |
RememberedSet::verify_old_oop(obj, p, allow_dirty, true);
|
|
510 |
*/
|
|
511 |
}
|