6917130: should test that annotations that have been optimized away are not emitted to classfile

Reviewed-by: jjg, darcy
Contributed-by: mali@csail.mit.edu, mernst@cs.washington.edu

test/tools/javac/typeAnnotations/classfile/DeadCode.java

+/*
+ * Copyright 2009-2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import java.io.*;
+import java.net.URL;
+import java.util.List;
+
+import com.sun.tools.classfile.*;
+
+/*
+ * @test
+ * @bug 6917130
+ * @summary test that optimized away annotations are not emited to classfile
+ */
+
+public class DeadCode {
+    public static void main(String[] args) throws Exception {
+        new DeadCode().run();
+    }
+
+    public void run() throws Exception {
+        ClassFile cf = getClassFile("DeadCode$Test.class");
+        test(cf);
+        for (Field f : cf.fields) {
+            test(cf, f);
+        }
+        for (Method m: cf.methods) {
+            test(cf, m);
+        }
+
+        countAnnotations();
+
+        if (errors > 0)
+            throw new Exception(errors + " errors found");
+        System.out.println("PASSED");
+    }
+
+    ClassFile getClassFile(String name) throws IOException, ConstantPoolException {
+        URL url = getClass().getResource(name);
+        InputStream in = url.openStream();
+        try {
+            return ClassFile.read(in);
+        } finally {
+            in.close();
+        }
+    }
+
+    /************ Helper annotations counting methods ******************/
+    void test(ClassFile cf) {
+        test(cf, Attribute.RuntimeVisibleTypeAnnotations, true);
+        test(cf, Attribute.RuntimeInvisibleTypeAnnotations, false);
+    }
+
+    void test(ClassFile cf, Method m) {
+        test(cf, m, Attribute.RuntimeVisibleTypeAnnotations, true);
+        test(cf, m, Attribute.RuntimeInvisibleTypeAnnotations, false);
+    }
+
+    void test(ClassFile cf, Field m) {
+        test(cf, m, Attribute.RuntimeVisibleTypeAnnotations, true);
+        test(cf, m, Attribute.RuntimeInvisibleTypeAnnotations, false);
+    }
+
+    // test the result of Attributes.getIndex according to expectations
+    // encoded in the method's name
+    void test(ClassFile cf, String name, boolean visible) {
+        int index = cf.attributes.getIndex(cf.constant_pool, name);
+        if (index != -1) {
+            Attribute attr = cf.attributes.get(index);
+            assert attr instanceof RuntimeTypeAnnotations_attribute;
+            RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;
+            all += tAttr.annotations.length;
+            if (visible)
+                visibles += tAttr.annotations.length;
+            else
+                invisibles += tAttr.annotations.length;
+        }
+    }
+
+    // test the result of Attributes.getIndex according to expectations
+    // encoded in the method's name
+    void test(ClassFile cf, Method m, String name, boolean visible) {
+        int index = m.attributes.getIndex(cf.constant_pool, name);
+        if (index != -1) {
+            Attribute attr = m.attributes.get(index);
+            assert attr instanceof RuntimeTypeAnnotations_attribute;
+            RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;
+            all += tAttr.annotations.length;
+            if (visible)
+                visibles += tAttr.annotations.length;
+            else
+                invisibles += tAttr.annotations.length;
+        }
+    }
+
+    // test the result of Attributes.getIndex according to expectations
+    // encoded in the method's name
+    void test(ClassFile cf, Field m, String name, boolean visible) {
+        int index = m.attributes.getIndex(cf.constant_pool, name);
+        if (index != -1) {
+            Attribute attr = m.attributes.get(index);
+            assert attr instanceof RuntimeTypeAnnotations_attribute;
+            RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;
+            all += tAttr.annotations.length;
+            if (visible)
+                visibles += tAttr.annotations.length;
+            else
+                invisibles += tAttr.annotations.length;
+        }
+    }
+
+    void countAnnotations() {
+        int expected_all = expected_visibles + expected_invisibles;
+
+        if (expected_all != all) {
+            errors++;
+            System.err.println("expected " + expected_all
+                    + " annotations but found " + all);
+        }
+
+        if (expected_visibles != visibles) {
+            errors++;
+            System.err.println("expected " + expected_visibles
+                    + " visibles annotations but found " + visibles);
+        }
+
+        if (expected_invisibles != invisibles) {
+            errors++;
+            System.err.println("expected " + expected_invisibles
+                    + " invisibles annotations but found " + invisibles);
+        }
+
+    }
+
+    int errors;
+    int all;
+    int visibles;
+    int invisibles;
+
+    /*********************** Test class *************************/
+    static int expected_invisibles = 1;
+    static int expected_visibles = 0;
+    static class Test {
+        @interface A {}
+
+        void test() {
+            List<? extends @A Object> o = null;
+            o.toString();
+
+            @A String m;
+            if (false) {
+                @A String a;
+                @A String b = "m";
+                b.toString();
+                List<? extends @A Object> c = null;
+                c.toString();
+            }
+        }
+    }
+
+}