/* * Copyright (c) 2020, 2022, 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 * @summary Test stack traces in exceptions and stack frames waslked by the StackWalker * API do not include the carrier stack frames * @requires vm.continuations * @modules java.management * @library /test/lib * @enablePreview * @run testng StackTraces * @run testng/othervm -XX:+UnlockDiagnosticVMOptions -XX:+ShowCarrierFrames StackTraces
*/
/** * Test that the stack trace in exceptions does not include the carrier thread * frames, except when running with -XX:+ShowCarrierFrames.
*/
@Test publicvoid testStackTrace() throws Exception {
VThreadRunner.run(() -> {
Exception e = new Exception(); boolean found = Arrays.stream(e.getStackTrace())
.map(StackTraceElement::getClassName)
.anyMatch("java.util.concurrent.ForkJoinPool"::equals);
assertTrue(found == hasJvmArgument("-XX:+ShowCarrierFrames"));
});
}
/** * Test that StackWalker does not include carrier thread frames.
*/
@Test publicvoid testStackWalker() throws Exception {
VThreadRunner.run(() -> {
StackWalker walker = StackWalker.getInstance(Set.of(RETAIN_CLASS_REFERENCE)); boolean found = walker.walk(sf ->
sf.map(StackWalker.StackFrame::getDeclaringClass)
.anyMatch(c -> c == ForkJoinPool.class));
assertFalse(found);
});
}
privatestaticboolean hasJvmArgument(String arg) { for (String argument : ManagementFactory.getRuntimeMXBean().getInputArguments()) { if (argument.equals(arg)) returntrue;
} returnfalse;
}
}
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