Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/debugger/ThreadProxy.java @ 210:05712c37c828
6676016: ParallelOldGC leaks memory
Summary: ensure that GCTask threads release resource and handle memory
Reviewed-by: jmasa, chrisphi
author | jcoomes |
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date | Wed, 18 Jun 2008 18:36:47 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2000-2002 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; /** <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; }