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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/compiler/arraycopy/TestDeadArrayCopyOnMemChain.java Normal file
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/*
* Copyright (c) 2015, 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 8080699
* @summary eliminated arraycopy node still reachable through exception edges
*
* @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
* compiler.arraycopy.TestDeadArrayCopyOnMemChain
*/
package compiler.arraycopy;
public class TestDeadArrayCopyOnMemChain {
static class A {
int f;
}
static void test_helper(Object o) {
}
static void test(int src_off, boolean flag) {
// dst is eliminated first. Eliminating dst causes src to be
// eliminated. When working on the safepoint at the uncommon
// trap in the exception handler, the eliminated ArrayCopyNode
// is reached through the exception edges.
Object[] dst = new Object[10];
Object[] src = new Object[10];
// src_off causes the exception handler to be run sometimes
try {
System.arraycopy(src, src_off, dst, 0, 10);
} catch (IndexOutOfBoundsException ioobe) {
// flag always false so test becomes uncommon trap. Make
// sure src is live at the unc.
if (flag) {
test_helper(src);
}
}
}
static public void main(String[] args) {
for (int i = 0; i < 20000; i++) {
test((i%2) == 0 ? 0 : -1, false);
}
}
}