--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/jvm/TestGetStackTraceId.java 2019-02-08 18:33:53.135476433 +0300 @@ -0,0 +1,71 @@ +/* + * Copyright (c) 2018, 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * 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. + */ + +package jdk.jfr.jvm; + +import jdk.jfr.FlightRecorder; +import jdk.jfr.internal.JVM; +import jdk.test.lib.Asserts; + +/** + * @test TestGetStackTraceId + * @key jfr + * + * @library /lib / + * + * @run main/othervm jdk.jfr.jvm.TestGetStackTraceId + */ +public class TestGetStackTraceId { + + public static void main(String... args) { + FlightRecorder.getFlightRecorder(); + JVM jvm = JVM.getJVM(); + + long id10 = getStackIdOfDepth(10); + assertValid(id10); + + long id5 = getStackIdOfDepth(5); + assertValid(id5); + + Asserts.assertNotEquals(id5, id10, "Different stack depth must return different stack trace ids"); + + assertMaxSkip(jvm); + } + + private static void assertMaxSkip(JVM jvm) { + assertValid(jvm.getStackTraceId(Integer.MAX_VALUE)); + } + + private static void assertValid(long value) { + Asserts.assertGreaterThan(value, 0L, "Stack trace id must be greater than 0, was " + value); + } + + public static long getStackIdOfDepth(int depth) { + if (depth > 0) { + return getStackIdOfDepth(depth - 1); + } + return JVM.getJVM().getStackTraceId(0); + } +}