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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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test/hotspot/jtreg/runtime/Thread/TestThreadDumpSMRInfo.java Normal file
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/*
* Copyright (c) 2017, 2025, 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
* @bug 8167108
* @summary Checks whether jstack reports a "Threads class SMR info" section.
*
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+EnableThreadSMRStatistics TestThreadDumpSMRInfo
*/
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.JDKToolFinder;
public class TestThreadDumpSMRInfo {
// jstack tends to be closely bound to the VM that we are running
// so use getTestJDKTool() instead of getCompileJDKTool() or even
// getJDKTool() which can fall back to "compile.jdk".
final static String JSTACK = JDKToolFinder.getTestJDKTool("jstack");
// jstack output may be lengthy, disable streaming output to avoid deadlocks
final static String DISABLE_STREAMING_OUTPUT = "-J-Djdk.attach.allowStreamingOutput=false";
final static String PID = "" + ProcessHandle.current().pid();
// Here's a sample "Threads class SMR info" section:
//
// Threads class SMR info:
// _java_thread_list=0x0000000000ce8da0, length=23, elements={
// 0x000000000043a800, 0x0000000000aee800, 0x0000000000b06800, 0x0000000000b26000,
// 0x0000000000b28800, 0x0000000000b2b000, 0x0000000000b2e000, 0x0000000000b30000,
// 0x0000000000b32800, 0x0000000000b35000, 0x0000000000b3f000, 0x0000000000b41800,
// 0x0000000000b44000, 0x0000000000b46800, 0x0000000000b48800, 0x0000000000b53000,
// 0x0000000000b55800, 0x0000000000b57800, 0x0000000000b5a000, 0x0000000000b5c800,
// 0x0000000000cc8800, 0x0000000000fd9800, 0x0000000000ef4800
// }
// _java_thread_list_alloc_cnt=24, _java_thread_list_free_cnt=23, _java_thread_list_max=23, _nested_thread_list_max=0
// _delete_lock_wait_cnt=0, _delete_lock_wait_max=0
// _to_delete_list_cnt=0, _to_delete_list_max=1
final static String HEADER_STR = "Threads class SMR info:";
static boolean verbose = false;
public static void main(String[] args) throws Exception {
if (args.length != 0) {
int arg_i = 0;
if (args[arg_i].equals("-v")) {
verbose = true;
arg_i++;
}
}
ProcessBuilder pb = new ProcessBuilder(JSTACK, DISABLE_STREAMING_OUTPUT, PID);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
if (verbose) {
System.out.println("stdout: " + output.getStdout());
}
output.shouldHaveExitValue(0);
System.out.println("INFO: jstack ran successfully.");
output.shouldContain(HEADER_STR);
System.out.println("INFO: Found: '" + HEADER_STR + "' in jstack output.");
System.out.println("Test PASSED.");
}
}