1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* 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);
}
|
