1 /*
   2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8046060
  27  * @summary Different results of floating point multiplication for lambda code block
  28  * @modules jdk.jdeps/com.sun.tools.classfile
  29  */
  30 
  31 import java.io.*;
  32 import java.net.URL;
  33 import com.sun.tools.classfile.*;
  34 import static com.sun.tools.classfile.AccessFlags.ACC_STRICT;
  35 
  36 public class LambdaTestStrictFPFlag {
  37     public static void main(String[] args) throws Exception {
  38         new LambdaTestStrictFPFlag().run();
  39     }
  40 
  41     void run() throws Exception {
  42         ClassFile cf = getClassFile("LambdaTestStrictFPFlag$Test.class");
  43         ConstantPool cp = cf.constant_pool;
  44         boolean found = false;
  45         for (Method meth: cf.methods) {
  46             if (meth.getName(cp).startsWith("lambda$")) {
  47                 if ((meth.access_flags.flags & ACC_STRICT) == 0) {
  48                     throw new Exception("strict flag missing from lambda");
  49                 }
  50                 found = true;
  51             }
  52         }
  53         if (!found) {
  54             throw new Exception("did not find lambda method");
  55         }
  56     }
  57 
  58     ClassFile getClassFile(String name) throws IOException, ConstantPoolException {
  59         URL url = getClass().getResource(name);
  60         InputStream in = url.openStream();
  61         try {
  62             return ClassFile.read(in);
  63         } finally {
  64             in.close();
  65         }
  66     }
  67 
  68     class Test {
  69         strictfp void test() {
  70             Face itf = () -> { };
  71         }
  72     }
  73 
  74     interface Face {
  75         void m();
  76     }
  77 }