Mercurial > hg > truffle
view src/share/vm/oops/instanceOop.hpp @ 11860:762dc2f23d1c
InvokeWithException: make next successor a special begin node which has the same locationidentity as the invoke
InvokeWithExceptionNode has the unpleasant property that it is a ControlSplit
and MemoryCheckPoint at the same time. In terms of scheduling, a node cannot
be placed after a ControlSplit node as it denotes the end of a block. Thus,
instead of connecting a FloatingReadNode to the InvokeWithException node
directly (as lastLocationAccess), we point rather to the BeginNode
(non-exceptional case) or ExceptionBeginNode.
To preserve consistency regarding memory dependencies, the former node must be
also a MemoryCheckPoint.
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Wed, 02 Oct 2013 11:16:21 +0200 |
parents | 8e47bac5643a |
children | 7944aba7ba41 |
line wrap: on
line source
/* * Copyright (c) 1997, 2012, 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. * */ #ifndef SHARE_VM_OOPS_INSTANCEOOP_HPP #define SHARE_VM_OOPS_INSTANCEOOP_HPP #include "oops/oop.hpp" // An instanceOop is an instance of a Java Class // Evaluating "new HashTable()" will create an instanceOop. class instanceOopDesc : public oopDesc { public: // aligned header size. static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; } // If compressed, the offset of the fields of the instance may not be aligned. static int base_offset_in_bytes() { // offset computation code breaks if UseCompressedKlassPointers // only is true return (UseCompressedOops && UseCompressedKlassPointers) ? klass_gap_offset_in_bytes() : sizeof(instanceOopDesc); } static bool contains_field_offset(int offset, int nonstatic_field_size) { int base_in_bytes = base_offset_in_bytes(); return (offset >= base_in_bytes && (offset-base_in_bytes) < nonstatic_field_size * heapOopSize); } }; #endif // SHARE_VM_OOPS_INSTANCEOOP_HPP