allow for clearing error messages to free memory

git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@4225 f5eafffb-2e1d-0410-98e4-8ec43c5233c4

com.ibm.wala.cast.test/harness-src/com/ibm/wala/cast/test/Util.java

@@ -29,6 +29,8 @@ public class Util {
             }
           }
         }
+        // clear out the errors to free some memory
+        ((CAstAbstractLoader)loader).clearMessages();
       }
     }
     if (message != null) {
@@ -36,5 +38,6 @@ public class Util {
     }
     Assert.assertTrue(String.valueOf(message), message == null);
   }
+  
 
 }

com.ibm.wala.cast/source/java/com/ibm/wala/cast/loader/CAstAbstractLoader.java

@@ -92,6 +92,11 @@ public abstract class CAstAbstractLoader implements IClassLoader {
     return errors.get(m);
   }
   
+  
+  public void clearMessages() {
+    errors.clear();
+  }
+  
   public IClass lookupClass(String className, IClassHierarchy cha) {
     assert this.cha == cha;
     return (IClass) types.get(TypeName.string2TypeName(className));