1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   7  * published by the Free Software Foundation.
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  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).
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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  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 }