Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/debugger/MachineDescription.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/MachineDescription.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,66 @@ +/* + * Copyright 2000-2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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 size of an address in bytes. Currently needed to be + able to traverse arrays of pointers or oops. (FIXME: since we're + already reading the Java primitive types' sizes from the remote + VM, it would be nice to remove this routine, using a similar + mechanism to how the TypeDataBase deals with primitive types.) */ + public long getOopSize(); + + /** 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(); +}