Merge V8 at 3.7.12.28
Bug: 5688872
Change-Id: Iddb40cae44d51a2b449f2858951e0472771f5981
diff --git a/test/mjsunit/string-external-cached.js b/test/mjsunit/string-external-cached.js
new file mode 100644
index 0000000..12312ac
--- /dev/null
+++ b/test/mjsunit/string-external-cached.js
@@ -0,0 +1,94 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-externalize-string --expose-gc
+// Test data pointer caching of external strings.
+
+function test() {
+ // Test string.charAt.
+ var charat_str = new Array(5);
+ charat_str[0] = "0123456789ABCDEF0123456789ABCDEF\
+0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
+0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
+0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
+0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF";
+ charat_str[1] = "0123456789ABCDEF";
+ for (var i = 0; i < 6; i++) charat_str[1] += charat_str[1];
+ try { // String can only be externalized once
+ externalizeString(charat_str[0], false);
+ externalizeString(charat_str[1], true);
+ } catch (ex) { }
+ charat_str[2] = charat_str[0].slice(0, -1);
+ charat_str[3] = charat_str[1].slice(0, -1);
+ charat_str[4] = charat_str[0] + charat_str[0];
+
+ for (var i = 0; i < 5; i++) {
+ assertEquals('B', charat_str[i].charAt(6*16 + 11));
+ assertEquals('C', charat_str[i].charAt(6*16 + 12));
+ assertEquals('A', charat_str[i].charAt(3*16 + 10));
+ assertEquals('B', charat_str[i].charAt(3*16 + 11));
+ }
+
+ charat_short = "012";
+ try { // String can only be externalized once
+ externalizeString(charat_short, true);
+ } catch (ex) { }
+ assertEquals("1", charat_short.charAt(1));
+
+ // Test regexp.
+ var re = /(A|B)/;
+ var rere = /(T.{1,2}B)/;
+ var ascii = "ABCDEFGHIJKLMNOPQRST";
+ var twobyte = "_ABCDEFGHIJKLMNOPQRST";
+ try {
+ externalizeString(ascii, false);
+ externalizeString(twobyte, true);
+ } catch (ex) { }
+ assertTrue(isAsciiString(ascii));
+ assertFalse(isAsciiString(twobyte));
+ var ascii_slice = ascii.slice(1,-1);
+ var twobyte_slice = twobyte.slice(2,-1);
+ var ascii_cons = ascii + ascii;
+ var twobyte_cons = twobyte + twobyte;
+ for (var i = 0; i < 2; i++) {
+ assertEquals(["A", "A"], re.exec(ascii));
+ assertEquals(["B", "B"], re.exec(ascii_slice));
+ assertEquals(["TAB", "TAB"], rere.exec(ascii_cons));
+ assertEquals(["A", "A"], re.exec(twobyte));
+ assertEquals(["B", "B"], re.exec(twobyte_slice));
+ assertEquals(["T_AB", "T_AB"], rere.exec(twobyte_cons));
+ }
+}
+
+// Run the test many times to ensure IC-s don't break things.
+for (var i = 0; i < 10; i++) {
+ test();
+}
+
+// Clean up string to make Valgrind happy.
+gc();
+gc();