jdk

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/*
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 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "memory/allocation.inline.hpp"
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#include "memory/resourceArea.hpp"
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#include "runtime/javaThread.hpp"
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#include "utilities/growableArray.hpp"
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void* GrowableArrayResourceAllocator::allocate(int max, int elementSize) {
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  assert(max >= 0, "integer overflow");
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  size_t byte_size = elementSize * (size_t) max;
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  return (void*)resource_allocate_bytes(byte_size);
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}
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void* GrowableArrayArenaAllocator::allocate(int max, int element_size, Arena* arena) {
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  assert(max >= 0, "integer overflow");
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  size_t byte_size = element_size * (size_t) max;
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  return arena->Amalloc(byte_size);
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}
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void* GrowableArrayCHeapAllocator::allocate(int max, int element_size, MEMFLAGS memflags) {
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  assert(max >= 0, "integer overflow");
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  size_t byte_size = element_size * (size_t) max;
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  // memory type has to be specified for C heap allocation
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  assert(memflags != mtNone, "memory type not specified for C heap object");
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  return (void*)AllocateHeap(byte_size, memflags);
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}
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void GrowableArrayCHeapAllocator::deallocate(void* elements) {
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  FreeHeap(elements);
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}
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#ifdef ASSERT
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GrowableArrayNestingCheck::GrowableArrayNestingCheck(bool on_resource_area) :
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    _nesting(on_resource_area ? Thread::current()->resource_area()->nesting() : 0) {
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}
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void GrowableArrayNestingCheck::on_resource_area_alloc() const {
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  // Check for insidious allocation bug: if a GrowableArray overflows, the
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  // grown array must be allocated under the same ResourceMark as the original.
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  // Otherwise, the _data array will be deallocated too early.
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  if (_nesting != Thread::current()->resource_area()->nesting()) {
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    fatal("allocation bug: GrowableArray could grow within nested ResourceMark");
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  }
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}
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void GrowableArrayMetadata::init_checks(const GrowableArrayBase* array) const {
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  // Stack allocated arrays support all three element allocation locations
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  if (array->allocated_on_stack_or_embedded()) {
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    return;
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  }
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  // Otherwise there's a strict one-to-one mapping
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  assert(on_C_heap() == array->allocated_on_C_heap(),
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         "growable array must be C heap allocated if elements are");
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  assert(on_resource_area() == array->allocated_on_res_area(),
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         "growable array must be resource allocated if elements are");
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  assert(on_arena() == array->allocated_on_arena(),
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         "growable array must be arena allocated if elements are");
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}
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void GrowableArrayMetadata::on_resource_area_alloc_check() const {
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  _nesting_check.on_resource_area_alloc();
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}
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#endif // ASSERT
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