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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/ThreadProxy.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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1 /* | |
2 * Copyright 2000-2002 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.debugger; | |
26 | |
27 /** <P> This interface abstracts raw access to operating system-level | |
28 threads. In a debugging environment these methods map to, for | |
29 example, thread_db calls on Solaris (see /usr/include/thread_db.h) | |
30 or the Win32 debugging API calls. In a runtime environment these | |
31 might map directly to pthread calls. </P> | |
32 | |
33 <P> Implementors of this interface must provide equals() and | |
34 hashCode() methods which work properly regardless of how the | |
35 ThreadProxy is obtained, in particular either through {@link | |
36 sun.jvm.hotspot.debugger.ThreadAccess} or the thread list provided | |
37 by {@link sun.jvm.hotspot.debugger.cdbg.CDebugger}. This allows | |
38 matching up of the OS's notion of the thread list of the target | |
39 process with any user-level lists that may be present (i.e., the | |
40 JavaThread list in the HotSpot VM). </P> | |
41 | |
42 <P> Implementors of this interface should also provide a | |
43 toString() which converts the ThreadProxy to a value easily | |
44 recognizable in the platform's debugger. (For example, on Solaris, | |
45 "t@<id>".) </P> | |
46 | |
47 <P> FIXME: had to be renamed from "Thread" to avoid numerous | |
48 clashes with java.lang.Thread -- would be nice to pick a more | |
49 consistent name with the rest of the system. </P> */ | |
50 | |
51 public interface ThreadProxy { | |
52 /** Retrieves the context for the given thread. It is only valid to | |
53 call this method if the thread is suspended (i.e., the process | |
54 has not been resumed via ProcessControl); throws an | |
55 IllegalThreadStateException if it is not. */ | |
56 public ThreadContext getContext() throws IllegalThreadStateException; | |
57 | |
58 /** Indicates whether calls to setContext() are valid. */ | |
59 public boolean canSetContext() throws DebuggerException; | |
60 | |
61 /** Sets the context for the given thread. The passed ThreadContext | |
62 must be a modified version of one returned from a previous call | |
63 to getContext(). It is only valid to call this method if the | |
64 thread is suspended (i.e., the process has not been resumed via | |
65 ProcessControl); throws an IllegalThreadStateException if it is | |
66 not. Throws a DebuggerException if the target process can not be | |
67 modified, for example because it is a core file. */ | |
68 public void setContext(ThreadContext context) | |
69 throws IllegalThreadStateException, DebuggerException; | |
70 } |