adjust debug context to reserved immutable handles

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/hpy/GraalHPyContext.java

@@ -791,7 +791,7 @@ public static GraalHPyNativeSymbol getGetterFunctionName(LLVMType llvmType) {
         }
     }
 
-    private static final int IMMUTABLE_HANDLE_COUNT = 256;
+    protected static final int IMMUTABLE_HANDLE_COUNT = 256;
 
     private GraalHPyHandle[] hpyHandleTable = new GraalHPyHandle[]{GraalHPyHandle.NULL_HANDLE};
     private int nextHandle = 1;

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/hpy/GraalHPyDebugContext.java

@@ -48,6 +48,7 @@
 import com.oracle.graal.python.nodes.call.CallNode;
 import com.oracle.graal.python.util.PythonUtils;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
+import java.util.Arrays;
 
 public final class GraalHPyDebugContext extends GraalHPyContext {
     private static final int DEFAULT_CLOSED_HANDLES_QUEUE_MAX_SIZE = 1024;
@@ -97,6 +98,8 @@ private void trackConstants() {
                 trackHandle((GraalHPyHandle) member);
             }
         }
+        assert debugHandleInfo.length <= IMMUTABLE_HANDLE_COUNT;
+        debugHandleInfo = Arrays.copyOf(debugHandleInfo, IMMUTABLE_HANDLE_COUNT * 2);
     }
 
     @Override