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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/ElfDecoder/TestElfDirectRead.java Normal file
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/*
* Copyright (c) 2018, 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 8193373
* @summary Test reading ELF info direct from underlaying file
* @requires (os.family == "linux") & (os.arch != "ppc64")
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
-XX:NativeMemoryTracking=detail TestElfDirectRead
*/
// This test intentionally disables caching of Elf sections during symbol lookup
// with WhiteBox.disableElfSectionCache(). On platforms which do not use function
// descriptors but use instead plain function pointers this slows down the lookup just a
// little bit, because all the symbols from an Elf file are still read consecutively
// after one 'fseek()' call. But on platforms with function descriptors like ppc64
// big-endian, we get two 'fseek()' calls for each symbol read from the Elf file
// because reading the file descriptor table is nested inside the loop which reads
// the symbols. This really trashes the I/O system and considerable slows down the
// test, so we need an extra long timeout setting.
/*
* @test
* @bug 8193373
* @summary Test reading ELF info direct from underlaying file
* @requires (os.family == "linux") & (os.arch == "ppc64")
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm/timeout=600 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
-XX:NativeMemoryTracking=detail TestElfDirectRead
*/
import jdk.test.lib.dcmd.PidJcmdExecutor;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.whitebox.WhiteBox;
public class TestElfDirectRead {
public static void main(String args[]) throws Exception {
WhiteBox wb = WhiteBox.getWhiteBox();
wb.disableElfSectionCache();
ProcessBuilder pb = new ProcessBuilder();
OutputAnalyzer output;
pb.command(new PidJcmdExecutor().getCommandLine("VM.native_memory", "detail"));
output = new OutputAnalyzer(pb.start());
// This is a pre-populated stack frame, should always exist if can decode
output.shouldContain("MallocSiteTable::new_entry");
}
}