--- /dev/null 2014-05-19 18:43:21.014427848 +0400 +++ new/test/runtime/whitebox/WBStackSize.java 2014-05-23 15:42:54.086131175 +0400 @@ -0,0 +1,121 @@ +/* + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test WBStackSize + * @summary verify that whitebox functions getThreadFullStackSize() and getThreadRemainingStackSize are working + * @library /testlibrary /testlibrary/whitebox + * @build WBStackSize + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xss512k WBStackSize + */ + +/* + * The test may product a false failure if too big StackYellowPages/StackRedPages/ShackShadowPages + * VM options are specified. The proper test would retrieve the page size from VM and account for these options + * instead of check below: + * Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1 + * + * Please file a test bug, if this is a problem. + */ + +import com.sun.management.HotSpotDiagnosticMXBean; +import sun.hotspot.WhiteBox; + +public class WBStackSize { + + static final long K = 1024; + + static final long MIN_STACK_SIZE = 8 * K; + static final long MAX_STACK_SIZE_ALLOCATED_IN_MAIN = 200 * K; // current value is about 130k on 64-bit platforms + + static final WhiteBox wb = WhiteBox.getWhiteBox(); + + static long stackSizeOnOverflow = -1; + + static int eatAllStack() { + return eatAllStack() * 2; + } + + static void testStackOverflow() { + + stackSizeOnOverflow = wb.getThreadRemainingStackSize(); + + if (stackSizeOnOverflow > MIN_STACK_SIZE) { + + try { + testStackOverflow(); + } catch (StackOverflowError e) { + // We caught SOE too early. The error will be reported in main() + } + + } else { + + try { + eatAllStack(); + throw new RuntimeException("Haven't caught StackOverflowError at all"); + } catch (StackOverflowError e) { + // OK: we caught the anticipated error + } + } + } + + public static void main(String[] args) { + HotSpotDiagnosticMXBean bean = sun.management.ManagementFactoryHelper.getDiagnosticMXBean(); + long configStackSize = Long.valueOf(bean.getVMOption("ThreadStackSize").getValue()) * K; + + System.out.println("ThreadStackSize VM option: " + configStackSize); + + long actualStackSize = wb.getThreadStackSize(); + System.out.println("Full stack size: " + actualStackSize); + + if (Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1) { + throw new RuntimeException("getThreadFullStackSize value [" + actualStackSize + + "] should be within 90%..110% of the value returned by HotSpotDiagnosticMXBean"); + } + + long remainingStackSize = wb.getThreadRemainingStackSize(); + System.out.println("Remaining stack size in main(): " + remainingStackSize); + + // Up to 200k can be already allocated by VM + if (remainingStackSize > configStackSize + || (configStackSize > MAX_STACK_SIZE_ALLOCATED_IN_MAIN + && remainingStackSize < configStackSize - MAX_STACK_SIZE_ALLOCATED_IN_MAIN)) { + + throw new RuntimeException("getThreadRemainingStackSize value [" + remainingStackSize + + "] should be at least ThreadStackSize value [" + configStackSize + "] minus [" + + MAX_STACK_SIZE_ALLOCATED_IN_MAIN + "]"); + } + + testStackOverflow(); + + if (stackSizeOnOverflow > MIN_STACK_SIZE) { + throw new RuntimeException("Caught StackOverflowError too early: when there were " + + stackSizeOnOverflow + " bytes in stack"); + } else if (stackSizeOnOverflow < 0) { + throw new RuntimeException("Internal test error: stackRemainingSize < 0"); + } else { + System.out.println("Caught StackOverflowError as expected"); + } + } +}