aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "memory/resourceArea.hpp"
aoqi@0: #include "runtime/thread.inline.hpp"
aoqi@0: #include "utilities/growableArray.hpp"
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0: void GenericGrowableArray::set_nesting() {
aoqi@0:   if (on_stack()) {
aoqi@0:     _nesting = Thread::current()->resource_area()->nesting();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void GenericGrowableArray::check_nesting() {
aoqi@0:   // Check for insidious allocation bug: if a GrowableArray overflows, the
aoqi@0:   // grown array must be allocated under the same ResourceMark as the original.
aoqi@0:   // Otherwise, the _data array will be deallocated too early.
aoqi@0:   if (on_stack() &&
aoqi@0:       _nesting != Thread::current()->resource_area()->nesting()) {
aoqi@0:     fatal("allocation bug: GrowableArray could grow within nested ResourceMark");
aoqi@0:   }
aoqi@0: }
aoqi@0: #endif
aoqi@0: 
aoqi@0: void* GenericGrowableArray::raw_allocate(int elementSize) {
aoqi@0:   assert(_max >= 0, "integer overflow");
aoqi@0:   size_t byte_size = elementSize * (size_t) _max;
aoqi@0:   if (on_stack()) {
aoqi@0:     return (void*)resource_allocate_bytes(byte_size);
aoqi@0:   } else if (on_C_heap()) {
aoqi@0:     return (void*)AllocateHeap(byte_size, _memflags);
aoqi@0:   } else {
aoqi@0:     return _arena->Amalloc(byte_size);
aoqi@0:   }
aoqi@0: }