| /* |
| * Copyright (c) 2000, 2002, 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 raw access to operating system-level |
| threads. In a debugging environment these methods map to, for |
| example, thread_db calls on Solaris (see /usr/include/thread_db.h) |
| or the Win32 debugging API calls. In a runtime environment these |
| might map directly to pthread calls. </P> |
| |
| <P> Implementors of this interface must provide equals() and |
| hashCode() methods which work properly regardless of how the |
| ThreadProxy is obtained, in particular either through {@link |
| sun.jvm.hotspot.debugger.ThreadAccess} or the thread list provided |
| by {@link sun.jvm.hotspot.debugger.cdbg.CDebugger}. This allows |
| matching up of the OS's notion of the thread list of the target |
| process with any user-level lists that may be present (i.e., the |
| JavaThread list in the HotSpot VM). </P> |
| |
| <P> Implementors of this interface should also provide a |
| toString() which converts the ThreadProxy to a value easily |
| recognizable in the platform's debugger. (For example, on Solaris, |
| "t@<id>".) </P> |
| |
| <P> FIXME: had to be renamed from "Thread" to avoid numerous |
| clashes with java.lang.Thread -- would be nice to pick a more |
| consistent name with the rest of the system. </P> */ |
| |
| public interface ThreadProxy { |
| /** Retrieves the context for the given thread. It is only valid to |
| call this method if the thread is suspended (i.e., the process |
| has not been resumed via ProcessControl); throws an |
| IllegalThreadStateException if it is not. */ |
| public ThreadContext getContext() throws IllegalThreadStateException; |
| |
| /** Indicates whether calls to setContext() are valid. */ |
| public boolean canSetContext() throws DebuggerException; |
| |
| /** Sets the context for the given thread. The passed ThreadContext |
| must be a modified version of one returned from a previous call |
| to getContext(). It is only valid to call this method if the |
| thread is suspended (i.e., the process has not been resumed via |
| ProcessControl); throws an IllegalThreadStateException if it is |
| not. Throws a DebuggerException if the target process can not be |
| modified, for example because it is a core file. */ |
| public void setContext(ThreadContext context) |
| throws IllegalThreadStateException, DebuggerException; |
| } |