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/*
* Copyright (c) 2001, 2004, 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.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;
}
}
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