Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/debugger/win32/Win32Thread.java @ 210:05712c37c828
6676016: ParallelOldGC leaks memory
Summary: ensure that GCTask threads release resource and handle memory
Reviewed-by: jmasa, chrisphi
author | jcoomes |
---|---|
date | Wed, 18 Jun 2008 18:36:47 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2001-2004 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.win32; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.debugger.x86.*; class Win32Thread implements ThreadProxy { private Win32Debugger debugger; private int handle; private boolean mustDuplicate; private boolean gotID; private int id; /** The address argument must be the address of the HANDLE of the desired thread in the target process. */ Win32Thread(Win32Debugger debugger, Address addr) { this.debugger = debugger; // FIXME: size of data fetched here should be configurable. // However, making it so would produce a dependency on the "types" // package from the debugger package, which is not desired. this.handle = (int) addr.getCIntegerAt(0, 4, true); // Thread handles in the target process must be duplicated before // fetching their contexts mustDuplicate = true; gotID = false; } /** The integer argument must be the value of a HANDLE received from the "threadlist" operation. */ Win32Thread(Win32Debugger debugger, long handle) { this.debugger = debugger; this.handle = (int) handle; mustDuplicate = false; gotID = false; } public ThreadContext getContext() throws IllegalThreadStateException { if (!debugger.isSuspended()) { throw new IllegalThreadStateException("Target process must be suspended"); } long[] data = debugger.getThreadIntegerRegisterSet(handle, mustDuplicate); Win32ThreadContext context = new Win32ThreadContext(debugger); for (int i = 0; i < data.length; i++) { context.setRegister(i, data[i]); } return context; } public boolean canSetContext() throws DebuggerException { return true; } public void setContext(ThreadContext thrCtx) throws IllegalThreadStateException, DebuggerException { if (!debugger.isSuspended()) { throw new IllegalThreadStateException("Target process must be suspended"); } X86ThreadContext context = (X86ThreadContext) thrCtx; long[] data = new long[X86ThreadContext.NPRGREG]; for (int i = 0; i < data.length; i++) { data[i] = context.getRegister(i); } debugger.setThreadIntegerRegisterSet(handle, mustDuplicate, data); } public boolean equals(Object obj) { if ((obj == null) || !(obj instanceof Win32Thread)) { return false; } return (((Win32Thread) obj).getThreadID() == getThreadID()); } public int hashCode() { return getThreadID(); } public String toString() { return Integer.toString(getThreadID()); } /** Retrieves the thread ID of this thread by examining the Thread Information Block. */ private int getThreadID() { if (!gotID) { try { // Get thread context X86ThreadContext context = (X86ThreadContext) getContext(); // Get LDT entry for FS register Win32LDTEntry ldt = debugger.getThreadSelectorEntry(handle, mustDuplicate, (int) context.getRegister(X86ThreadContext.FS)); // Get base address of segment = Thread Environment Block (TEB) Address teb = debugger.newAddress(ldt.getBase()); // Thread ID is at offset 0x24 id = (int) teb.getCIntegerAt(0x24, 4, true); gotID = true; } catch (AddressException e) { throw new DebuggerException(e); } } return id; } }