Add missing string length check in regexp engine.

R=erik.corry@gmail.com
BUG=v8:2172
TEST=regress-2172.js

Review URL: https://chromiumcodereview.appspot.com/10536170

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11816 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/regexp-macro-assembler-ia32.cc

@@ -316,6 +316,11 @@ void RegExpMacroAssemblerIA32::CheckNotBackReferenceIgnoreCase(
   // uncaptured. In either case succeed immediately.
   __ j(equal, &fallthrough);
 
+  // Check that there are sufficient characters left in the input.
+  __ mov(eax, edi);
+  __ add(eax, ebx);
+  BranchOrBacktrack(greater, on_no_match);
+
   if (mode_ == ASCII) {
     Label success;
     Label fail;

src/x64/regexp-macro-assembler-x64.cc

@@ -353,6 +353,14 @@ void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
   // In either case succeed immediately.
   __ j(equal, &fallthrough);
 
+  // -----------------------
+  // rdx - Start of capture
+  // rbx - length of capture
+  // Check that there are sufficient characters left in the input.
+  __ movl(rax, rdi);
+  __ addl(rax, rbx);
+  BranchOrBacktrack(greater, on_no_match);
+
   if (mode_ == ASCII) {
     Label loop_increment;
     if (on_no_match == NULL) {

test/mjsunit/regress/regress-2172.js

+// Copyright 2012 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.
+
+for (var i = 0; i < 10000; i++){
+  (i + "\0").split(/(.)\1/i);
+}
+
+for (var i = 0; i < 10000; i++){
+  (i + "\u1234\0").split(/(.)\1/i);
+}
+