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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.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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140
test/hotspot/gtest/oops/test_arrayOop.cpp Normal file
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/*
* Copyright (c) 1997, 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.
*/
#include "oops/arrayOop.hpp"
#include "oops/oop.inline.hpp"
#include "unittest.hpp"
#include "utilities/globalDefinitions.hpp"
static bool check_max_length_overflow(BasicType type) {
julong length = arrayOopDesc::max_array_length(type);
julong bytes_per_element = type2aelembytes(type);
julong bytes = length * bytes_per_element
+ arrayOopDesc::base_offset_in_bytes(type);
return (julong) (size_t) bytes == bytes;
}
TEST_VM(arrayOopDesc, boolean) {
ASSERT_PRED1(check_max_length_overflow, T_BOOLEAN);
}
TEST_VM(arrayOopDesc, char) {
ASSERT_PRED1(check_max_length_overflow, T_CHAR);
}
TEST_VM(arrayOopDesc, float) {
ASSERT_PRED1(check_max_length_overflow, T_FLOAT);
}
TEST_VM(arrayOopDesc, double) {
ASSERT_PRED1(check_max_length_overflow, T_DOUBLE);
}
TEST_VM(arrayOopDesc, byte) {
ASSERT_PRED1(check_max_length_overflow, T_BYTE);
}
TEST_VM(arrayOopDesc, short) {
ASSERT_PRED1(check_max_length_overflow, T_SHORT);
}
TEST_VM(arrayOopDesc, int) {
ASSERT_PRED1(check_max_length_overflow, T_INT);
}
TEST_VM(arrayOopDesc, long) {
ASSERT_PRED1(check_max_length_overflow, T_LONG);
}
TEST_VM(arrayOopDesc, object) {
ASSERT_PRED1(check_max_length_overflow, T_OBJECT);
}
TEST_VM(arrayOopDesc, array) {
ASSERT_PRED1(check_max_length_overflow, T_ARRAY);
}
TEST_VM(arrayOopDesc, narrowOop) {
ASSERT_PRED1(check_max_length_overflow, T_NARROWOOP);
}
// T_VOID and T_ADDRESS are not supported by max_array_length()
TEST_VM(arrayOopDesc, base_offset) {
#ifdef _LP64
if (UseCompactObjectHeaders) {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 16);
if (UseCompressedOops) {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 12);
} else {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 16);
}
} else if (UseCompressedClassPointers) {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 16);
} else {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 24);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 24);
if (UseCompressedOops) {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 20);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 20);
} else {
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 24);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 24);
}
}
#else
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 16);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 12);
EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 12);
#endif
}