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Copy pathPC.java
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135 lines (122 loc) · 3.9 KB
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
package org.mozilla.javascript.debug;
import org.mozilla.javascript.*;
class PC
implements IPC
{
PC(NativeCall frame, ThreadState threadState)
{
_frame = frame;
_threadState = threadState;
_pc = -1; // signify 'not yet set'
}
PC(Script script, int pc)
{
_script = script;
_pc = pc;
}
// implements IPC
public IScript getScript()
{
if(null == _script)
{
NativeFunction o = _frame.getFunctionObject();
_script = _threadState.getScriptManager().
lockScriptForFunction(o);
}
return _script;
}
public int getPC()
{
if(-1 == _pc)
{
_pc = _frame.debugPC;
}
return _pc;
}
public boolean isValid()
{
if( null != _threadState )
return _threadState.isValid();
else if( null != _script )
return _script.isValid();
return false;
}
public ISourceLocation getSourceLocation()
{
if(null == _sourceLocation)
{
int lineno = 0; // XXX is this a good default???
NativeFunction fun = null;
Script script = ((Script)getScript());
if(null != script)
fun = script.getWrappedFunction();
if(null != fun && (fun instanceof INativeFunScript))
lineno = ((INativeFunScript)fun).pc2lineno(getPC());
_sourceLocation = new SourceLocation(this, lineno);
}
return _sourceLocation;
}
public void finalize()
{
if(null != _script && null != _threadState)
{
_threadState.getScriptManager().releaseScript(_script, false);
_script = null;
}
}
public String toString()
{
return "PC for "+getScript()+" line "+getSourceLocation().getLine();
}
public int hashCode()
{
return getScript().hashCode() * 17 + getPC();
}
public boolean equals(Object obj)
{
if(!(obj instanceof PC))
return false;
PC o = (PC)obj;
if( (!isValid()) || (!o.isValid()))
return false;
return getPC() == o.getPC() && getScript().equals(o.getScript());
}
private NativeCall _frame;
private Script _script;
private SourceLocation _sourceLocation;
private ThreadState _threadState;
private int _pc;
}