8073844: fatal annotation processing errors do not stop compilation

JavacProcessingEnvironment lets the should-stop policy decide when the compilation should stop.

Reviewed-by: jjg

langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java

@@ -1336,7 +1336,6 @@ public class JavacProcessingEnvironment implements ProcessingEnvironment, Closea
 
         errorStatus = errorStatus || (compiler.errorCount() > 0);
 
-        if (!errorStatus)
         round.finalCompiler();
 
         if (newSourceFiles.size() > 0)
@@ -1350,10 +1349,8 @@ public class JavacProcessingEnvironment implements ProcessingEnvironment, Closea
         if (!taskListener.isEmpty())
             taskListener.finished(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
 
-        if (errorStatus) {
+        if (errorStatus && compiler.errorCount() == 0) {
-            if (compiler.errorCount() == 0)
             compiler.log.nerrors++;
-            return true;
         }
 
         compiler.enterTreesIfNeeded(roots);

langtools/test/tools/javac/processing/StopAfterError/StopAfterError.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016, 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.
+ */
+
+/*
+ * @test
+ * @bug 8073844
+ * @summary If an error is produced by an annotation processor, the code should not be Attred, \
+ *          unless requested
+ * @modules jdk.compiler
+ * @compile StopAfterError.java
+ * @compile/fail/ref=StopAfterError.out -XDrawDiagnostics -processor StopAfterError StopAfterErrorAux.java
+ * @compile/fail/ref=StopAfterError.out -XDshould-stop.ifError=PROCESS -XDrawDiagnostics -processor StopAfterError StopAfterErrorAux.java
+ * @compile/fail/ref=StopAfterErrorContinue.out -XDshould-stop.ifError=ATTR -XDrawDiagnostics -processor StopAfterError StopAfterErrorAux.java
+ */
+
+import java.util.Set;
+
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.lang.model.SourceVersion;
+import javax.lang.model.element.TypeElement;
+import javax.tools.Diagnostic.Kind;
+
+@SupportedAnnotationTypes("*")
+public class StopAfterError extends AbstractProcessor {
+
+    @Override
+    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+        if (roundEnv.processingOver()) {
+            processingEnv.getMessager().printMessage(Kind.ERROR, "Stop!");
+        }
+        return false;
+    }
+
+    @Override
+    public SourceVersion getSupportedSourceVersion() {
+        return SourceVersion.latestSupported();
+    }
+
+}

langtools/test/tools/javac/processing/StopAfterError/StopAfterError.out

@@ -0,0 +1,2 @@
+- compiler.err.proc.messager: Stop!
+1 error

langtools/test/tools/javac/processing/StopAfterError/StopAfterErrorAux.java

@@ -0,0 +1,6 @@
+/* /nodynamiccopyright/ */
+class StopAfterErrorAux {
+    public void test() {
+        should not; get here;
+    }
+}

langtools/test/tools/javac/processing/StopAfterError/StopAfterErrorContinue.out

@@ -0,0 +1,4 @@
+- compiler.err.proc.messager: Stop!
+StopAfterErrorAux.java:4:9: compiler.err.cant.resolve.location: kindname.class, should, , , (compiler.misc.location: kindname.class, StopAfterErrorAux, null)
+StopAfterErrorAux.java:4:21: compiler.err.cant.resolve.location: kindname.class, get, , , (compiler.misc.location: kindname.class, StopAfterErrorAux, null)
+3 errors