149 lines
6.2 KiB
Java
149 lines
6.2 KiB
Java
/*
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* Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test WBStackSize
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* @summary verify that whitebox functions getThreadFullStackSize() and getThreadRemainingStackSize are working
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* @modules java.base/jdk.internal.misc
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* @library /test/lib
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @comment Must use the same stacksize for Java threads and compiler threads in case of thread recycling
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xss512k -XX:CompilerThreadStackSize=512 WBStackSize
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*/
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/*
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* The test may product a false failure if too big StackYellowPages/StackRedPages/ShackShadowPages
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* VM options are specified. The proper test would retrieve the page size from VM and account for these options
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* instead of check below:
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* Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1
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*
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* Please file a test bug, if this is a problem.
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*/
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import jdk.test.whitebox.WhiteBox;
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import jdk.test.lib.Platform;
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public class WBStackSize {
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static final long K = 1024;
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static final long MIN_STACK_SIZE = 8 * K;
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static final long MAX_STACK_SIZE_ALLOCATED_IN_MAIN = 150 * K; // current value is about 130k on 64-bit platforms
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static final WhiteBox wb = WhiteBox.getWhiteBox();
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static long stackSizeOnOverflow = -1;
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static int eatAllStack() {
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return eatAllStack() * 2;
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}
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static void testStackOverflow() {
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stackSizeOnOverflow = wb.getThreadRemainingStackSize();
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if (stackSizeOnOverflow > MIN_STACK_SIZE) {
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try {
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testStackOverflow();
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} catch (StackOverflowError e) {
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// We caught SOE too early. The error will be reported in main()
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}
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} else {
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try {
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eatAllStack();
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throw new RuntimeException("Haven't caught StackOverflowError at all");
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} catch (StackOverflowError e) {
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// OK: we caught the anticipated error
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}
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}
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}
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public static void main(String[] args) {
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long pageSize = wb.getVMPageSize();
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long configStackSize = wb.getIntxVMFlag("ThreadStackSize") * K;
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System.out.println("ThreadStackSize VM option: " + configStackSize);
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long stackProtectionSize = wb.getIntxVMFlag("StackShadowPages") * pageSize;
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System.out.println("Size of protected shadow pages: " + stackProtectionSize);
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long actualStackSize = wb.getThreadStackSize();
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System.out.println("Full stack size: " + actualStackSize);
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if (!Platform.isAix()) {
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if (Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1) {
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throw new RuntimeException("getThreadStackSize value [" + actualStackSize
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+ "] should be within 90%..110% of ThreadStackSize value");
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}
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} else {
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// AIX pthread implementation returns stacks with sizes varying a lot.
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// We add +64K to assure stacks are not too small, thus we get
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// even more variation to bigger sizes. So only check the lower bound.
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// Allow for at least one page deviation.
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long slack = (long)(configStackSize * 0.1);
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if (slack < pageSize) {
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if (configStackSize - actualStackSize > pageSize) {
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throw new RuntimeException("getThreadStackSize value [" + actualStackSize
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+ "] should not be more than one page smaller than "
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+ "ThreadStackSize value");
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}
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} else {
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if (configStackSize - actualStackSize > slack) {
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throw new RuntimeException("getThreadStackSize value [" + actualStackSize
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+ "] should not be less than 90% of ThreadStackSize value");
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}
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}
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}
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long remainingStackSize = wb.getThreadRemainingStackSize();
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System.out.println("Remaining stack size in main(): " + remainingStackSize);
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// Up to 150k can be already allocated by VM and some space is used for stack protection.
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long spaceAlreadyOccupied = MAX_STACK_SIZE_ALLOCATED_IN_MAIN + stackProtectionSize;
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if (remainingStackSize > configStackSize
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|| (configStackSize > spaceAlreadyOccupied
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&& remainingStackSize < configStackSize - spaceAlreadyOccupied)) {
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throw new RuntimeException("getThreadRemainingStackSize value [" + remainingStackSize
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+ "] should be at least ThreadStackSize value [" + configStackSize + "] minus ["
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+ spaceAlreadyOccupied + "]");
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}
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testStackOverflow();
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if (stackSizeOnOverflow > MIN_STACK_SIZE) {
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throw new RuntimeException("Caught StackOverflowError too early: when there were "
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+ stackSizeOnOverflow + " bytes in stack");
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} else if (stackSizeOnOverflow < 0) {
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throw new RuntimeException("Internal test error: stackRemainingSize < 0");
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} else {
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System.out.println("Caught StackOverflowError as expected");
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}
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}
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}
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