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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/gtest/classfile/test_stringIntern.cpp Normal file
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/*
* Copyright (c) 2024, 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 "classfile/stringTable.hpp"
#include "classfile/symbolTable.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "unittest.hpp"
// Tests that strings are interned and returns the same string when interning from different string types
// Simple ASCII string "Java(R)!!"
static const char static_ascii_utf8_str[] = {0x4A, 0x61, 0x76, 0x61, 0x28, 0x52, 0x29, 0x21, 0x21};
static const size_t ASCII_LENGTH = 9;
// Complex string "Jāvá®!☺☻", has character lengths 13122133 = 16
static const unsigned char static_utf8_str[] = {0x4A, 0x61, 0xCC, 0x84, 0x76, 0xC3, 0xA1, 0xC2, 0xAE, 0x21, 0xE2, 0x98, 0xBA, 0xE2, 0x98, 0xBB};
static const size_t COMPLEX_LENGTH = 16;
void test_intern(const char* utf8_str, size_t utf8_length) {
JavaThread* THREAD = JavaThread::current();
ThreadInVMfromNative ThreadInVMfromNative(THREAD);
HandleMark hm(THREAD);
oop interned_string_from_utf8 = StringTable::intern(utf8_str, THREAD);
EXPECT_TRUE(java_lang_String::equals(interned_string_from_utf8, utf8_str, utf8_length));
EXPECT_EQ(java_lang_String::hash_code(utf8_str, utf8_length),java_lang_String::hash_code(interned_string_from_utf8));
Symbol* symbol_from_utf8 = SymbolTable::new_symbol(utf8_str, static_cast<int>(utf8_length));
oop interned_string_from_symbol = StringTable::intern(symbol_from_utf8, THREAD);
EXPECT_EQ(interned_string_from_utf8, interned_string_from_symbol);
oop interned_string_from_oop1 = StringTable::intern(interned_string_from_utf8, THREAD);
EXPECT_EQ(interned_string_from_utf8, interned_string_from_oop1);
}
TEST_VM(StringIntern, intern_ascii) {
const char utf8_str[ASCII_LENGTH + 1] = { };
memcpy((unsigned char*)utf8_str, static_ascii_utf8_str, ASCII_LENGTH);
test_intern(utf8_str, ASCII_LENGTH);
}
TEST_VM(StringIntern, intern_varlen) {
const char utf8_str[COMPLEX_LENGTH + 1] = { };
memcpy((unsigned char*)utf8_str, static_utf8_str, COMPLEX_LENGTH);
test_intern(utf8_str, COMPLEX_LENGTH);
}