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 }