• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1// Copyright 2010 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --expose-externalize-string --expose-gc
29// Test data pointer caching of external strings.
30
31function test() {
32  // Test string.charAt.
33  var charat_str = new Array(5);
34  charat_str[0] = "0123456789ABCDEF0123456789ABCDEF\
350123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
360123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
370123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
380123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF";
39  charat_str[1] = "0123456789ABCDEF";
40  for (var i = 0; i < 6; i++) charat_str[1] += charat_str[1];
41  try {  // String can only be externalized once
42    externalizeString(charat_str[0], false);
43    externalizeString(charat_str[1], true);
44  } catch (ex) { }
45  charat_str[2] = charat_str[0].slice(0, -1);
46  charat_str[3] = charat_str[1].slice(0, -1);
47  charat_str[4] = charat_str[0] + charat_str[0];
48
49  for (var i = 0; i < 5; i++) {
50    assertEquals('B', charat_str[i].charAt(6*16 + 11));
51    assertEquals('C', charat_str[i].charAt(6*16 + 12));
52    assertEquals('A', charat_str[i].charAt(3*16 + 10));
53    assertEquals('B', charat_str[i].charAt(3*16 + 11));
54  }
55
56  charat_short = "012";
57  try {  // String can only be externalized once
58    externalizeString(charat_short, true);
59  } catch (ex) { }
60  assertEquals("1", charat_short.charAt(1));
61
62  // Test regexp and short substring.
63  var re = /(A|B)/;
64  var rere = /(T.{1,2}B)/;
65  var ascii = "ABCDEFGHIJKLMNOPQRST";
66  var twobyte = "_ABCDEFGHIJKLMNOPQRST";
67  try {
68    externalizeString(ascii, false);
69    externalizeString(twobyte, true);
70  } catch (ex) { }
71  assertTrue(isAsciiString(ascii));
72  assertFalse(isAsciiString(twobyte));
73  var ascii_slice = ascii.slice(1,-1);
74  var twobyte_slice = twobyte.slice(2,-1);
75  var ascii_cons = ascii + ascii;
76  var twobyte_cons = twobyte + twobyte;
77  for (var i = 0; i < 2; i++) {
78    assertEquals(["A", "A"], re.exec(ascii));
79    assertEquals(["B", "B"], re.exec(ascii_slice));
80    assertEquals(["TAB", "TAB"], rere.exec(ascii_cons));
81    assertEquals(["A", "A"], re.exec(twobyte));
82    assertEquals(["B", "B"], re.exec(twobyte_slice));
83    assertEquals(["T_AB", "T_AB"], rere.exec(twobyte_cons));
84    assertEquals("DEFG", ascii_slice.substr(2, 4));
85    assertEquals("DEFG", twobyte_slice.substr(2, 4));
86    assertEquals("DEFG", ascii_cons.substr(3, 4));
87    assertEquals("DEFG", twobyte_cons.substr(4, 4));
88  }
89
90  // Test adding external strings
91  var short_ascii = "E=";
92  var long_ascii = "MCsquared";
93  var short_twobyte = "E\u1234";
94  var long_twobyte = "MCsquare\u1234";
95  try {  // String can only be externalized once
96    externalizeString(short_ascii, false);
97    externalizeString(long_ascii, false);
98    externalizeString(short_twobyte, true);
99    externalizeString(long_twobyte, true);
100    assertTrue(isAsciiString(short_asii) && isAsciiString(long_ascii));
101    assertFalse(isAsciiString(short_twobyte) || isAsciiString(long_twobyte));
102  } catch (ex) { }
103  assertEquals("E=MCsquared", short_ascii + long_ascii);
104  assertTrue(isAsciiString(short_ascii + long_ascii));
105  assertEquals("MCsquaredE=", long_ascii + short_ascii);
106  assertEquals("E\u1234MCsquare\u1234", short_twobyte + long_twobyte);
107  assertFalse(isAsciiString(short_twobyte + long_twobyte));
108  assertEquals("E=MCsquared", "E=" + long_ascii);
109  assertEquals("E\u1234MCsquared", short_twobyte + "MCsquared");
110  assertEquals("E\u1234MCsquared", short_twobyte + long_ascii);
111  assertFalse(isAsciiString(short_twobyte + long_ascii));
112}
113
114// Run the test many times to ensure IC-s don't break things.
115for (var i = 0; i < 10; i++) {
116  test();
117}
118
119// Clean up string to make Valgrind happy.
120gc();
121gc();
122