[GR-38633] Throw an AbstractTruffleException in EspressoLanguage.parse.

PullRequest: graal/11757

Author: mukel

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/EspressoLanguage.java

@@ -26,14 +26,12 @@
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
 
-import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
-import com.oracle.truffle.espresso.meta.EspressoError;
-import com.oracle.truffle.espresso.runtime.JavaVersion;
 import org.graalvm.home.Version;
 import org.graalvm.options.OptionDescriptors;
 
 import com.oracle.truffle.api.CallTarget;
 import com.oracle.truffle.api.CompilerDirectives;
+import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
 import com.oracle.truffle.api.ContextThreadLocal;
 import com.oracle.truffle.api.TruffleLanguage;
 import com.oracle.truffle.api.TruffleLanguage.Registration;
@@ -54,13 +52,15 @@
 import com.oracle.truffle.espresso.descriptors.Symbols;
 import com.oracle.truffle.espresso.descriptors.Types;
 import com.oracle.truffle.espresso.descriptors.Utf8ConstantTable;
+import com.oracle.truffle.espresso.meta.EspressoError;
 import com.oracle.truffle.espresso.meta.JavaKind;
 import com.oracle.truffle.espresso.nodes.commands.DestroyVMNode;
 import com.oracle.truffle.espresso.nodes.commands.ExitCodeNode;
 import com.oracle.truffle.espresso.nodes.commands.GetBindingsNode;
 import com.oracle.truffle.espresso.nodes.commands.ReferenceProcessNode;
 import com.oracle.truffle.espresso.runtime.EspressoContext;
 import com.oracle.truffle.espresso.runtime.EspressoThreadLocalState;
+import com.oracle.truffle.espresso.runtime.JavaVersion;
 import com.oracle.truffle.espresso.runtime.StaticObject;
 import com.oracle.truffle.espresso.runtime.StaticObject.StaticObjectFactory;
 import com.oracle.truffle.espresso.substitutions.Substitutions;
@@ -224,7 +224,9 @@ protected CallTarget parse(final ParsingRequest request) throws Exception {
             RootNode node = new ReferenceProcessNode(this);
             return node.getCallTarget();
         }
-        throw new UnsupportedOperationException("Unsupported operation. Use the language bindings to load classes e.g. context.getBindings(\"" + ID + "\").getMember(\"java.lang.Integer\")");
+        throw new EspressoParseError(
+                        "Espresso cannot evaluate Java sources directly, only a few special commands are supported: " + GetBindingsNode.EVAL_NAME + " and " + ReferenceProcessNode.EVAL_NAME + "\n" +
+                                        "Use the \"" + ID + "\" language bindings to load guest Java classes e.g. context.getBindings(\"" + ID + "\").getMember(\"java.lang.Integer\")");
     }
 
     public Utf8ConstantTable getUtf8ConstantTable() {

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/EspressoParseError.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2022, 2022, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.espresso;
+
+import com.oracle.truffle.api.TruffleLanguage;
+import com.oracle.truffle.api.exception.AbstractTruffleException;
+import com.oracle.truffle.api.interop.ExceptionType;
+import com.oracle.truffle.api.interop.InteropLibrary;
+import com.oracle.truffle.api.library.ExportLibrary;
+import com.oracle.truffle.api.library.ExportMessage;
+
+/**
+ * Espresso cannot parse Java sources directly, this exception is meant for parsing requests other
+ * than the few special commands that Espresso exposes to embedders.
+ *
+ * @see EspressoLanguage#parse(TruffleLanguage.ParsingRequest)
+ * @see com.oracle.truffle.espresso.nodes.commands.GetBindingsNode#EVAL_NAME
+ * @see com.oracle.truffle.espresso.nodes.commands.ReferenceProcessNode#EVAL_NAME
+ */
+@ExportLibrary(InteropLibrary.class)
+@SuppressWarnings("serial")
+class EspressoParseError extends AbstractTruffleException {
+
+    EspressoParseError(String message) {
+        super(message);
+    }
+
+    @ExportMessage
+    ExceptionType getExceptionType() {
+        return ExceptionType.PARSE_ERROR;
+    }
+}