From 444dd946c86cf87a35e1cc6f1350182f339871a6 Mon Sep 17 00:00:00 2001
From: Keith Seitz <keiths@redhat.com>
Date: Wed, 1 Nov 2006 18:20:19 +0000
Subject: Location.java: New file.

        * gnu/gcj/jvmti/Location.java: New file.
        * gnu/gcj/jvmti/BreakpointManager.java: New file.
        * jvmti.cc (_Jv_JVMTI_SetBreakpoint): New function.
        (_Jv_JVMTI_ClearBreakpoint): New function.
        (_Jv_JVMTI_Interface): Define SetBreakpoint and ClearBreakpoint.
        * sources.am: Regenerated.
        * Makefile.in: Regenerated.

From-SVN: r118391
---
 libjava/gnu/gcj/jvmti/BreakpointManager.java | 76 ++++++++++++++++++++++++++++
 libjava/gnu/gcj/jvmti/Location.java          | 60 ++++++++++++++++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 libjava/gnu/gcj/jvmti/BreakpointManager.java
 create mode 100644 libjava/gnu/gcj/jvmti/Location.java

(limited to 'libjava/gnu')

diff --git a/libjava/gnu/gcj/jvmti/BreakpointManager.java b/libjava/gnu/gcj/jvmti/BreakpointManager.java
new file mode 100644
index 0000000..205bf6d
--- /dev/null
+++ b/libjava/gnu/gcj/jvmti/BreakpointManager.java
@@ -0,0 +1,76 @@
+// BreakpointManager.java - A convenience class for dealing with breakpoints
+
+/* Copyright (C) 2006  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.jvmti;
+
+import java.util.Hashtable;
+
+/**
+ * A class which manages breakpoints in the VM interpreter engine.
+ *
+ * BreakpointManager is a location manager that the interpreter
+ * uses to lookup the original instruction for any given installed
+ * breakpoint. JVMTI does not allow multiple breakpoints to be set
+ * at any given location.
+ *
+ * @author Keith Seitz (keiths@redhat.com)
+ */
+public class BreakpointManager
+{
+  private static BreakpointManager _instance = new BreakpointManager ();
+
+  // List of breakpoints indexed by Location
+  private Hashtable _breakpoints;
+
+  private BreakpointManager ()
+  {
+    _breakpoints = new Hashtable ();
+  }
+
+  /**
+   * Creates a new breakpoint. SetBreakpoint will verify the validity
+   * of the arguments.
+   *
+   * @param method  method in which to set breakpoint (a jmethodID)
+   * @param location index where the breakpoint is to be set (a jlocation)
+   */
+  public static Breakpoint newBreakpoint (long method, long location)
+  {
+    Breakpoint bp = new Breakpoint (method, location);
+    Location loc = new Location (method, location);
+    _instance._breakpoints.put (loc, bp);
+    return bp;
+  }
+
+  /**
+   * Deletes the breakpoint at the given Location
+   *
+   * @param method method in which to clear breakpoint
+   * @param location index of breakpoint in method
+   */
+  public static void deleteBreakpoint (long method, long location)
+  {
+    Location loc = new Location (method, location);
+    _instance._breakpoints.remove (loc);
+  }
+
+  /**
+   * Returns the breakpoint at the given location or null if none installed
+   * at location
+   *
+   * @param method the jmethodID of the breakpoint location
+   * @param location the index in the method
+   */
+  public static Breakpoint getBreakpoint (long method, long location)
+  {
+    Location loc = new Location (method, location);
+    return (Breakpoint) _instance._breakpoints.get (loc);
+  }
+}
diff --git a/libjava/gnu/gcj/jvmti/Location.java b/libjava/gnu/gcj/jvmti/Location.java
new file mode 100644
index 0000000..8fae4dd
--- /dev/null
+++ b/libjava/gnu/gcj/jvmti/Location.java
@@ -0,0 +1,60 @@
+// Location.java - a wrapper class for breakpoint locations in JVMTI
+
+/* Copyright (C) 2006  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.jvmti;
+
+import java.lang.Long;
+
+/**
+ * This class represents a breakpoint location (pair<jmethodID,jlocation>).
+ * BreakpointManager uses this class as a key in the Map of installed
+ * breakpoints.
+ *
+ * @author Keith Seitz (keiths@redhat.com)
+ */
+public class Location
+{
+  // method (a jmethodID in JVMTI)
+  private long method;
+
+  // index (a jlocation in JVMTI)
+  private long location;
+
+  /**
+   * Constructor
+   *
+   * @param method   the method defined by this location (a jmethodID)
+   * @param location the integer index of the insn in the method (a jlocation)
+   */
+  public Location (long method, long location)
+  {
+    this.method = method;
+    this.location = location;
+  }
+
+  public int hashCode ()
+  {
+    return toString ().hashCode ();
+  }
+
+  public boolean equals (Object obj)
+  {
+    Location loc = (Location) obj;
+    return (loc.method == method && loc.location == location);
+  }
+
+  /**
+   * Converts the Location to a String
+   */
+  public String toString ()
+  {
+    return Long.toHexString (method) + "." + Long.toString (location);
+  }
+}
-- 
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