| /* |
| * Copyright (c) 1997, 2020, 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "utilities/growableArray.hpp" |
| |
| void* GrowableArrayResourceAllocator::allocate(int max, int elementSize) { |
| assert(max >= 0, "integer overflow"); |
| size_t byte_size = elementSize * (size_t) max; |
| |
| return (void*)resource_allocate_bytes(byte_size); |
| } |
| |
| void* GrowableArrayArenaAllocator::allocate(int max, int element_size, Arena* arena) { |
| assert(max >= 0, "integer overflow"); |
| size_t byte_size = element_size * (size_t) max; |
| |
| return arena->Amalloc(byte_size); |
| } |
| |
| void* GrowableArrayCHeapAllocator::allocate(int max, int element_size, MEMFLAGS memflags) { |
| assert(max >= 0, "integer overflow"); |
| size_t byte_size = element_size * (size_t) max; |
| |
| // memory type has to be specified for C heap allocation |
| assert(memflags != mtNone, "memory type not specified for C heap object"); |
| return (void*)AllocateHeap(byte_size, memflags); |
| } |
| |
| void GrowableArrayCHeapAllocator::deallocate(void* elements) { |
| FreeHeap(elements); |
| } |
| |
| #ifdef ASSERT |
| |
| GrowableArrayNestingCheck::GrowableArrayNestingCheck(bool on_stack) : |
| _nesting(on_stack ? Thread::current()->resource_area()->nesting() : 0) { |
| } |
| |
| void GrowableArrayNestingCheck::on_stack_alloc() const { |
| // Check for insidious allocation bug: if a GrowableArray overflows, the |
| // grown array must be allocated under the same ResourceMark as the original. |
| // Otherwise, the _data array will be deallocated too early. |
| if (_nesting != Thread::current()->resource_area()->nesting()) { |
| fatal("allocation bug: GrowableArray could grow within nested ResourceMark"); |
| } |
| } |
| |
| void GrowableArrayMetadata::init_checks(const GrowableArrayBase* array) const { |
| // Stack allocated arrays support all three element allocation locations |
| if (array->allocated_on_stack()) { |
| return; |
| } |
| |
| // Otherwise there's a strict one-to-one mapping |
| assert(on_C_heap() == array->allocated_on_C_heap(), |
| "growable array must be C heap allocated if elements are"); |
| assert(on_stack() == array->allocated_on_res_area(), |
| "growable array must be resource allocated if elements are"); |
| assert(on_arena() == array->allocated_on_arena(), |
| "growable array must be arena allocated if elements are"); |
| } |
| |
| void GrowableArrayMetadata::on_stack_alloc_check() const { |
| _nesting_check.on_stack_alloc(); |
| } |
| |
| #endif // ASSERT |