convenience method since this pattern is used many times throughout Hudson

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@9887 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/Util.java

@@ -26,6 +26,8 @@ import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 import java.io.PrintStream;
+import java.io.StringWriter;
+import java.io.PrintWriter;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.net.URI;
@@ -786,6 +788,17 @@ public class Util {
         }
     }
 
+    /**
+     * Obtains the stack dump as a string.
+     *
+     * @since 1.222
+     */
+    public static String toString(Throwable t) {
+        StringWriter sw = new StringWriter();
+        t.printStackTrace(new PrintWriter(sw));
+        return sw.toString();
+    }
+
     public static final SimpleDateFormat XS_DATETIME_FORMATTER = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
 
     // Note: RFC822 dates must not be localized!