1 /* 2 * Copyright (c) 2011, 2012, 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 /** 26 * @test 27 * @bug 7116216 28 * @summary The vm crashes when GC happens during throwing a StackOverflow exception 29 * 30 * @run main/othervm -Xcomp -Xbatch StackOverflow 31 */ 32 33 public class StackOverflow { 34 static String stackOverflow_largeFrame_liveOopForGC; 35 36 public static int stackOverflow_largeFrame(int call_count, String liveOopForGC) { 37 try { 38 int return_count = stackOverflow_largeFrame(++call_count, liveOopForGC); 39 if (return_count == 0) { 40 try { 41 LargeFrame.method_with_many_locals(liveOopForGC, 2,3,4,5,6,7,liveOopForGC); 42 } catch (StackOverflowError e2) { 43 // access liveOopForGC to make it a live variable 44 stackOverflow_largeFrame_liveOopForGC = liveOopForGC; 45 } 46 } 47 return return_count - 1; 48 } catch (StackOverflowError e) { 49 // Return a value that is large enough such that no unrecoverable 50 // stack overflow will occur afterwards, but that is small enough 51 // such that calling LargeFrame.method_with_many_locals() will 52 // cause a StackOverflowError. 53 // Don't use a call here because we're out of stack space anyway! 54 int tmp = call_count / 2; 55 return (tmp < 100 ? tmp : 100); 56 } 57 } 58 public static void main(String args[]) { 59 LargeFrame.method_with_many_locals(new Object(), 2,3,4,5,6,7,new Object()); 60 61 stackOverflow_largeFrame(0, "this is a live oop to test GC"); 62 System.out.println("finished ok!"); 63 } 64 }