GH-430 logical value for PString fixed; TruffleString added to includeInstance()

Author: thurka

visualvm/heapviewer.truffle/src/org/graalvm/visualvm/heapviewer/truffle/lang/python/PythonDetailsProvider.java

@@ -131,6 +131,8 @@ public String getDetailsString(String className, Instance instance) {
             return name;
         }
         if (PSTRING_MASK.equals(className)) {
+            String val = DetailsUtils.getInstanceFieldString(instance, "materializedValue");    // NOI18N
+            if (val != null) return val;
             return DetailsUtils.getInstanceFieldString(instance, "value");    // NOI18N
         }
         if (PBUILTIN_CLASSTYPE_MASK.equals(className)) {

visualvm/heapviewer.truffle/src/org/graalvm/visualvm/heapviewer/truffle/lang/python/PythonObjectProperties.java

@@ -95,7 +95,8 @@ protected boolean includeInstance(Instance instance) {
 
             if (className.startsWith("java.lang.") || // NOI18N
                 className.startsWith("java.math.") || // NOI18N
-                className.startsWith("com.oracle.graal.python.runtime.datatype.")) // NOI18N
+                className.startsWith("com.oracle.graal.python.runtime.datatype.") || // NOI18N
+                className.startsWith("com.oracle.truffle.api.strings."))             // NOI18N
                 return true;
 
             return false;
@@ -150,7 +151,8 @@ protected boolean includeInstance(Instance instance) {
 
             if (className.startsWith("java.lang.") || // NOI18N
                 className.startsWith("java.math.") || // NOI18N
-                className.startsWith("com.oracle.graal.python.runtime.datatype.")) // NOI18N
+                className.startsWith("com.oracle.graal.python.runtime.datatype.") || // NOI18N
+                className.startsWith("com.oracle.truffle.api.strings."))             // NOI18N
                 return true;
 
             return false;