/*
* Copyright (c) 2000, 2003, 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;
/** <P> This interface abstracts over access to operating system-level
threads in the underlying process. It is designed to be minimal
and generic to allow cross-platform compatibility. </P>
<P> The basic operation this interface supports is creating a
sun.jvm.hotspot.debugger.ThreadProxy "token" for an existing
thread. As an example, the HotSpot VM contains a list of Java
threads, encapsulated in VM-specific JavaThread objects. Each of
these contains a platform-dependent field with the OS-level thread
identifier; on Solaris, this field's type is "thread_t", while on
Windows, it is HANDLE. It is necessary to be able to map from
these fields to a ThreadProxy object, in particular to be able to
get the thread's context. However, since the types of these fields
vary greatly from OS to OS (some use integers as thread IDs, some
use pointers as thread handles) it is not possible to define one
particular type (Address, long) in this interface as the lookup
"key" for a Thread. </P>
<P> For this reason this mapping mechanism takes the Address of
the memory location containing the thread identifier. On Solaris,
this is the address of a location containing a thread_t; on
Windows, this is the address of a location containing a HANDLE for
a thread. On Linux, this is the address of a location containing a
pthread_t.</P>
<P> The {@link sun.jvm.hotspot.debugger.cdbg.CDebugger} interface
provides access to the entire thread list of the target process,
but this is optional functionality not required to get the SA to
work. </P> */
public interface ThreadAccess {
/** Gets an abstract ThreadProxy object for the thread identified by
the contents of the memory location pointed to by addr. The
contents at location addr are inherently platform-dependent; see
/**代码未完, 请加载全部代码(NowJava.com).**/