Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/debugger/MachineDescription.java @ 7353:b5280041f59e
Experiment with soft alignment for branch targets.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 13 Jan 2013 19:32:16 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2008, 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. * */ package sun.jvm.hotspot.debugger; import java.io.Serializable; /** Encapsulates machine-specific information that currently must be exported up to the Java level. Implementations must be serializable. */ public interface MachineDescription extends Serializable { /** Returns the size of an address in bytes. Currently needed to be able to traverse arrays of pointers or oops. */ public long getAddressSize(); /** Returns the maximum value of the C integer type with the given size in bytes and signedness. Throws IllegalArgumentException if the size in bytes is not legal for a C type (or can not be handled by this system). Note that the current implementation does not currently handle unsigned 8-byte longs properly. */ public long cIntegerTypeMaxValue(long sizeInBytes, boolean isUnsigned); /** Returns the minimum value of the C integer type with the given size in bytes and signedness. Throws IllegalArgumentException if the size in bytes is not legal for a C type (or can not be handled by this system). */ public long cIntegerTypeMinValue(long sizeInBytes, boolean isUnsigned); /** Indicates whether the CPU is big- or little-endian. This information is typically only needed by the Debugger implementation. */ public boolean isBigEndian(); /** Indicates whether the underlying machine supports the LP64 data model (currently only SPARC/64). */ public boolean isLP64(); }