--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/bugspot/StackTraceEntry.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2001-2002 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.bugspot;
+
+import sun.jvm.hotspot.debugger.cdbg.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.runtime.*;
+
+/** This class describes a frame in a stack trace. It abstracts over
+    C/C++ and Java frames. */
+
+public class StackTraceEntry {
+  private CFrame cFrame;
+  private CDebugger dbg;
+  private JavaVFrame javaFrame;
+  private String value; // What is displayed in a stack trace
+  // For merging C and Java stack traces.
+  // For more precise stack traces, should probably have a way to
+  // convert a CFrame to a sun.jvm.hotspot.runtime.Frame. For now,
+  // doing similar algorithm to jdbx (which does not have intimate
+  // knowledge of the VM).
+  private boolean isUnknownCFrame;
+
+  public StackTraceEntry(CFrame cFrame, CDebugger dbg) {
+    this.cFrame = cFrame;
+    this.dbg = dbg;
+    computeValue();
+  }
+
+  public StackTraceEntry(JavaVFrame javaFrame) {
+    this.javaFrame = javaFrame;
+    computeValue();
+  }
+
+  public boolean    isCFrame()     { return (cFrame != null);    }
+  public boolean    isJavaFrame()  { return (javaFrame != null); }
+  public CFrame     getCFrame()    { return cFrame;              }
+  public JavaVFrame getJavaFrame() { return javaFrame;           }
+  public boolean    isUnknownCFrame() { return isUnknownCFrame;  }
+  public String toString() {
+    return value;
+  }
+
+  private void computeValue() {
+    isUnknownCFrame = true;
+    value = "<unknown>";
+    if (cFrame != null) {
+      PCFinder.Info info = PCFinder.findPC(cFrame.pc(), cFrame.loadObjectForPC(), dbg);
+      if (info.getName() != null) {
+        value = "(C) " + info.getName();
+        isUnknownCFrame = false;
+        if (info.getConfidence() == PCFinder.LOW_CONFIDENCE) {
+          value = value + " (?)";
+        }
+        if (info.getOffset() >= 0) {
+          value = value + " + 0x" + Long.toHexString(info.getOffset());
+        }
+      }
+    } else if (javaFrame != null) {
+      isUnknownCFrame = false;
+      Method m = javaFrame.getMethod();
+      value = "(J) " + m.externalNameAndSignature();
+    }
+  }
+}