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*
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* version 2 for more details (a copy is included in the LICENSE file that
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/**
* @test
* @bug 6478991
* @summary C1 NullCheckEliminator yields incorrect exceptions
*
* @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest
*/
public class NullCheckTest {
static class A {
int f;
public final void inlined(A a) {
// This cast is intended to fail.
B b = ((B) a);
}
}
static class B extends A {
}
private static void test(A a1, A a2) {
// Inlined call must do a null check on a1.
// However, the exlipcit NullCheck instruction is eliminated and
// the null check is folded into the field load below, so the
// exception in the inlined method is thrown before the null check
// and the NullPointerException is not thrown.
a1.inlined(a2);
int x = a1.f;
}
public static void main(String[] args) {
// load classes
new B();
try {
test(null, new A());
throw new InternalError("FAILURE: no exception");
} catch (NullPointerException ex) {
System.out.println("CORRECT: NullPointerException");
} catch (ClassCastException ex) {
System.out.println("FAILURE: ClassCastException");
throw ex;
}
}
}