1 /*
   2  * Copyright (c) 2013, 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 8026775
  28  * @summary Uncommon trap blob did not bang all the stack shadow pages
  29  *
  30  * @run main/othervm -server -XX:+IgnoreUnrecognizedVMOptions -XX:+TieredCompilation UncommonTrapStackBang
  31  * @run main/othervm -server -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation UncommonTrapStackBang
  32  *
  33  *
  34  * Note: This test does not reproduce the problem with absolute
  35  * certainty. Empirically the bug reproduces on Windows some 80+% of
  36  * the time. Setting everything up to fail in 100% of the cases turns
  37  * out to be tricky at best.
  38  *
  39  *
  40  * The goal of this test is to set up the following stack:
  41  *
  42  * doIt()
  43  * eatStack()
  44  * ...
  45  * eatStack()
  46  * run()
  47  *
  48  *
  49  * When doIt() gets executed it will hit an uncommon trap and expand
  50  * into a huge interpreter frame. The doIt method then calls the
  51  * compiled version of StringBuilder.<init>() which does a single
  52  * stack bang StackShadowPages down.

   1 /*
   2  * Copyright (c) 2013, 2014, 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 8026775
  28  * @summary Uncommon trap blob did not bang all the stack shadow pages
  29  *
  30  * @run main/othervm UncommonTrapStackBang


  31  *
  32  * Note: This test does not reproduce the problem with absolute
  33  * certainty. Empirically the bug reproduces on Windows some 80+% of
  34  * the time. Setting everything up to fail in 100% of the cases turns
  35  * out to be tricky at best.
  36  *
  37  *
  38  * The goal of this test is to set up the following stack:
  39  *
  40  * doIt()
  41  * eatStack()
  42  * ...
  43  * eatStack()
  44  * run()
  45  *
  46  *
  47  * When doIt() gets executed it will hit an uncommon trap and expand
  48  * into a huge interpreter frame. The doIt method then calls the
  49  * compiled version of StringBuilder.<init>() which does a single
  50  * stack bang StackShadowPages down.