Mon, 29 Apr 2013 16:13:57 -0400
8011773: Some tests on Interned String crashed JVM with OOM
Summary: Instead of terminating the VM, throw OutOfMemoryError exceptions.
Reviewed-by: coleenp, dholmes
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | /** |
aoqi@0 | 26 | * @test |
aoqi@0 | 27 | * @bug 6478991 |
aoqi@0 | 28 | * @summary C1 NullCheckEliminator yields incorrect exceptions |
aoqi@0 | 29 | * |
aoqi@0 | 30 | * @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest |
aoqi@0 | 31 | */ |
aoqi@0 | 32 | |
aoqi@0 | 33 | public class NullCheckTest { |
aoqi@0 | 34 | static class A { |
aoqi@0 | 35 | int f; |
aoqi@0 | 36 | |
aoqi@0 | 37 | public final void inlined(A a) { |
aoqi@0 | 38 | // This cast is intended to fail. |
aoqi@0 | 39 | B b = ((B) a); |
aoqi@0 | 40 | } |
aoqi@0 | 41 | } |
aoqi@0 | 42 | |
aoqi@0 | 43 | static class B extends A { |
aoqi@0 | 44 | } |
aoqi@0 | 45 | |
aoqi@0 | 46 | |
aoqi@0 | 47 | private static void test(A a1, A a2) { |
aoqi@0 | 48 | // Inlined call must do a null check on a1. |
aoqi@0 | 49 | // However, the exlipcit NullCheck instruction is eliminated and |
aoqi@0 | 50 | // the null check is folded into the field load below, so the |
aoqi@0 | 51 | // exception in the inlined method is thrown before the null check |
aoqi@0 | 52 | // and the NullPointerException is not thrown. |
aoqi@0 | 53 | a1.inlined(a2); |
aoqi@0 | 54 | |
aoqi@0 | 55 | int x = a1.f; |
aoqi@0 | 56 | } |
aoqi@0 | 57 | |
aoqi@0 | 58 | public static void main(String[] args) { |
aoqi@0 | 59 | // load classes |
aoqi@0 | 60 | new B(); |
aoqi@0 | 61 | try { |
aoqi@0 | 62 | test(null, new A()); |
aoqi@0 | 63 | |
aoqi@0 | 64 | throw new InternalError("FAILURE: no exception"); |
aoqi@0 | 65 | } catch (NullPointerException ex) { |
aoqi@0 | 66 | System.out.println("CORRECT: NullPointerException"); |
aoqi@0 | 67 | } catch (ClassCastException ex) { |
aoqi@0 | 68 | System.out.println("FAILURE: ClassCastException"); |
aoqi@0 | 69 | throw ex; |
aoqi@0 | 70 | } |
aoqi@0 | 71 | } |
aoqi@0 | 72 | } |