mirror of git://gcc.gnu.org/git/gcc.git
83 lines
2.3 KiB
Java
83 lines
2.3 KiB
Java
// BreakpointManager.java - A convenience class for dealing with breakpoints
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/* Copyright (C) 2006, 2007 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package gnu.gcj.jvmti;
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import java.util.Hashtable;
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/**
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* A class which manages breakpoints in the VM interpreter engine.
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*
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* BreakpointManager is a location manager that the interpreter
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* uses to lookup the original instruction for any given installed
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* breakpoint. JVMTI does not allow multiple breakpoints to be set
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* at any given location.
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*
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* @author Keith Seitz (keiths@redhat.com)
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*/
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public class BreakpointManager
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{
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private static BreakpointManager _instance = new BreakpointManager ();
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// List of breakpoints indexed by Location
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private Hashtable _breakpoints;
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private BreakpointManager ()
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{
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_breakpoints = new Hashtable ();
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}
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/**
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* Creates a new breakpoint. SetBreakpoint will verify the validity
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* of the arguments.
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*
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* @param method method in which to set breakpoint (a jmethodID)
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* @param location index where the breakpoint is to be set (a jlocation)
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*/
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public static Breakpoint newBreakpoint (long method, long location)
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{
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NormalBreakpoint bp = new NormalBreakpoint (method, location);
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Location loc = new Location (method, location);
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bp.install ();
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_instance._breakpoints.put (loc, bp);
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return bp;
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}
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/**
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* Deletes the breakpoint at the given Location
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*
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* @param method method in which to clear breakpoint
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* @param location index of breakpoint in method
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*/
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public static void deleteBreakpoint (long method, long location)
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{
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Location loc = new Location (method, location);
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Breakpoint bp = (Breakpoint) _instance._breakpoints.get (loc);
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if (bp != null)
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{
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bp.remove ();
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_instance._breakpoints.remove (loc);
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}
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}
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/**
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* Returns the breakpoint at the given location or null if none installed
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* at location
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*
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* @param method the jmethodID of the breakpoint location
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* @param location the index in the method
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*/
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public static Breakpoint getBreakpoint (long method, long location)
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{
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Location loc = new Location (method, location);
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return (Breakpoint) _instance._breakpoints.get (loc);
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}
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}
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