From: yangguo@chromium.org <yangguo@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Thu, 5 Sep 2013 14:32:49 +0000 (+0000)
Subject: Fix bug in regexp result object construction.
X-Git-Tag: upstream/4.7.83~12642
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d9659da6f48c267f39bff85f5f2b839e6d2a1801;p=platform%2Fupstream%2Fv8.git

Fix bug in regexp result object construction.

R=verwaest@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23548018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16556 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---

diff --git a/src/runtime.cc b/src/runtime.cc
index f51b687..9e44b58 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -2469,7 +2469,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_RegExpConstructResult) {
   }
   Object* new_object;
   { MaybeObject* maybe_new_object =
-        isolate->heap()->AllocateFixedArrayWithHoles(elements_count);
+        isolate->heap()->AllocateFixedArray(elements_count);
     if (!maybe_new_object->ToObject(&new_object)) return maybe_new_object;
   }
   FixedArray* elements = FixedArray::cast(new_object);
diff --git a/test/mjsunit/regress/regress-regexp-construct-result.js b/test/mjsunit/regress/regress-regexp-construct-result.js
new file mode 100644
index 0000000..84bdd20
--- /dev/null
+++ b/test/mjsunit/regress/regress-regexp-construct-result.js
@@ -0,0 +1,45 @@
+// Copyright 2013 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.
+
+// Create a huge regexp with many alternative capture groups, most of
+// which do not capture anything, but the corresponding capture slot
+// in the result object has to exist, even though filled with undefined.
+// Having a large result array helps stressing GC.
+
+var num_captures = 1000;
+var regexp_string = "(a)";
+for (var i = 0; i < num_captures - 1; i++) {
+  regexp_string += "|(b)";
+}
+var regexp = new RegExp(regexp_string);
+
+for (var i = 0; i < 10; i++) {
+  var matches = regexp.exec("a");
+  var count = 0;
+  matches.forEach(function() { count++; });
+  assertEquals(num_captures + 1, count);
+}