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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/ErrorHandling/SecondaryErrorTest.java Normal file
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/*
* Copyright (c) 2014, 2024 SAP SE. All rights reserved.
* Copyright (c) 2014, 2026, 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 Check secondary error handling
* @library /test/lib
* @requires vm.flagless
* @requires vm.debug
* @comment ASAN grabs SIGFPE earlier than vm signal handler
* @requires !vm.asan
* @requires os.family != "windows"
* @modules java.base/jdk.internal.misc
* java.management
* @run driver SecondaryErrorTest no_callstacks
*/
/*
* @test
* @summary Check secondary error handling
* @library /test/lib
* @requires vm.flagless
* @requires vm.debug
* @comment ASAN grabs SIGFPE earlier than vm signal handler
* @requires !vm.asan
* @requires os.family != "windows"
* @modules java.base/jdk.internal.misc
* java.management
* @run driver SecondaryErrorTest with_callstacks
*/
import java.io.File;
import java.util.ArrayList;
import java.util.regex.Pattern;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
public class SecondaryErrorTest {
public static void main(String[] args) throws Exception {
boolean with_callstacks = false;
if (args.length != 1) {
throw new IllegalArgumentException("Missing argument");
} else if (args[0].equals("with_callstacks")) {
with_callstacks = true;
} else if (args[0].equals("no_callstacks")) {
with_callstacks = false;
} else {
throw new IllegalArgumentException("unknown argument (" + args[0] + ")");
}
// How this works:
// The test will fault with SIGFPE (ErrorHandlerTest=15) and then, during error handling,
// fault twice with SIGSEGV (TestCrashInErrorHandler=14). The point is not only to test
// secondary crashes, but secondary crashes with a *different* error signal. This should
// be handled correctly and not hang/end the process (so the signal mask must be set correctly).
// See JDK-8065895.
// We do this twice, to check that secondary signal handling works repeatedly.
// We also check, optionally, that +ErrorLogSecondaryErrorDetails produces callstacks for
// the secondary error.
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
"-XX:+UnlockDiagnosticVMOptions",
"-Xmx100M",
"-XX:-CreateCoredumpOnCrash",
"-XX:ErrorHandlerTest=15",
"-XX:TestCrashInErrorHandler=14",
"-XX:" + (with_callstacks ? "+" : "-") + "ErrorLogSecondaryErrorDetails",
"-version");
OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
// we should have crashed with a SIGFPE
output_detail.shouldMatch("# A fatal error has been detected by the Java Runtime Environment:.*");
output_detail.shouldMatch("#.+SIGFPE.*");
// extract hs-err file
File hs_err_file = HsErrFileUtils.openHsErrFileFromOutput(output_detail);
// scan hs-err file: File should contain the "[error occurred during error reporting..]"
// markers which show that the secondary error handling kicked in and handled the
// error successfully. As an added test, we check that the last line contains "END.",
// which is an end marker written in the last step and proves that hs-err file was
// completely written.
ArrayList<Pattern> patternlist = new ArrayList<>();
patternlist.add(Pattern.compile("Will crash now \\(TestCrashInErrorHandler=14\\)..."));
patternlist.add(Pattern.compile("\\[error occurred during error reporting \\(test secondary crash 1\\).*\\]"));
if (with_callstacks) {
patternlist.add(Pattern.compile("\\[siginfo:.*\\(SIGSEGV\\).*\\]"));
patternlist.add(Pattern.compile("\\[stack: Native frames:.*"));
patternlist.add(Pattern.compile(".*VMError::controlled_crash.*"));
}
// and again, to see that repeated error reporting steps work
patternlist.add(Pattern.compile("Will crash now \\(TestCrashInErrorHandler=14\\)..."));
patternlist.add(Pattern.compile("\\[error occurred during error reporting \\(test secondary crash 2\\).*\\]"));
if (with_callstacks) {
patternlist.add(Pattern.compile("\\[siginfo:.*\\(SIGSEGV\\).*\\]"));
patternlist.add(Pattern.compile("\\[stack: Native frames:.*"));
patternlist.add(Pattern.compile(".*VMError::controlled_crash.*"));
}
Pattern[] pattern = patternlist.toArray(new Pattern[] {});
HsErrFileUtils.checkHsErrFileContent(hs_err_file, pattern, false, true);
System.out.println("OK.");
}
}