1 /* 2 * Copyright (c) 2016, 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 /* @test 25 * @bug 8149170 26 * @summary Test native functions return booleans as 0/1 but differently than java functions 27 * @modules java.base/jdk.internal.misc 28 * @library /testlibrary 29 * @compile BoolConstructor.java 30 * @run main/native NativeSmallIntCallsTest 31 */ 32 33 // This test shows that returns from native calls for boolean truncate to JNI_TRUE if value != 0 34 // and JNI_FALSE if value returned is 0. 35 36 import jdk.test.lib.Asserts; 37 38 public class NativeSmallIntCallsTest { 39 static native boolean nativeCastToBoolCallTrue(); 40 static native boolean nativeCastToBoolCallFalse(); 41 static native boolean nativeCallBoolConstructor(int visible, boolean expected); 42 static { 43 System.loadLibrary("NativeSmallIntCalls"); 44 } 45 46 public static void main(java.lang.String[] unused) throws Exception { 47 // Call through jni 48 // JNI makes all results != 0 true for compatibility 49 boolean nativeTrueVal = nativeCastToBoolCallTrue(); 50 Asserts.assertTrue(nativeTrueVal, "trueval is false!"); 51 52 boolean nativeFalseVal = nativeCastToBoolCallFalse(); 53 Asserts.assertTrue(nativeFalseVal, "falseval is false in native!"); 54 55 // Call a constructor or method that passes jboolean values into Java from native 56 nativeCallBoolConstructor(1, true); 57 nativeCallBoolConstructor(0x10, true); 58 nativeCallBoolConstructor(0x100, false); 59 nativeCallBoolConstructor(0x1000, false); 60 } 61 }