Fix problem with arguments object ICs not checking for dictionary mode elements.

R=kmillikin@chromium.org
BUG=1514
TEST=mjsunit/regress/regress-1513.js

Review URL: http://codereview.chromium.org/7282029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8497 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/ic-arm.cc

@@ -952,6 +952,9 @@ static MemOperand GenerateUnmappedArgumentsLookup(MacroAssembler* masm,
   const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
   Register backing_store = parameter_map;
   __ ldr(backing_store, FieldMemOperand(parameter_map, kBackingStoreOffset));
+  Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
+  __ CheckMap(backing_store, scratch, fixed_array_map, slow_case,
+              DONT_DO_SMI_CHECK);
   __ ldr(scratch, FieldMemOperand(backing_store, FixedArray::kLengthOffset));
   __ cmp(key, Operand(scratch));
   __ b(cs, slow_case);

src/ia32/ic-ia32.cc

@@ -528,6 +528,8 @@ static Operand GenerateUnmappedArgumentsLookup(MacroAssembler* masm,
   const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
   Register backing_store = parameter_map;
   __ mov(backing_store, FieldOperand(parameter_map, kBackingStoreOffset));
+  Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
+  __ CheckMap(backing_store, fixed_array_map, slow_case, DONT_DO_SMI_CHECK);
   __ mov(scratch, FieldOperand(backing_store, FixedArray::kLengthOffset));
   __ cmp(key, Operand(scratch));
   __ j(greater_equal, slow_case);

src/runtime.cc

@@ -3925,8 +3925,13 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DefineOrRedefineDataProperty) {
     Handle<NumberDictionary> extended_dictionary =
         NumberDictionarySet(dictionary, index, obj_value, details);
     if (*extended_dictionary != *dictionary) {
+      if (js_object->GetElementsKind() ==
+          JSObject::NON_STRICT_ARGUMENTS_ELEMENTS) {
+        FixedArray::cast(js_object->elements())->set(1, *extended_dictionary);
+      } else {
         js_object->set_elements(*extended_dictionary);
       }
+    }
     return *obj_value;
   }
 

src/x64/ic-x64.cc

@@ -1266,6 +1266,8 @@ static Operand GenerateUnmappedArgumentsLookup(MacroAssembler* masm,
   const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
   Register backing_store = parameter_map;
   __ movq(backing_store, FieldOperand(parameter_map, kBackingStoreOffset));
+  Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
+  __ CheckMap(backing_store, fixed_array_map, slow_case, DONT_DO_SMI_CHECK);
   __ movq(scratch, FieldOperand(backing_store, FixedArray::kLengthOffset));
   __ cmpq(key, scratch);
   __ j(greater_equal, slow_case);

test/mjsunit/regress/regress-1513.js

+// Copyright 2011 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.
+
+// Deleting a mapped arguments property and adding it via
+// Object.defineProperty should not crash.
+
+function testcase() {
+  return (function (a, b, c) {
+      delete arguments[0];
+      Object.defineProperty(arguments, "0", {
+              value: 10,
+              writable: false,
+              enumerable: false,
+              configurable: false
+            });
+      assertEquals(10, arguments[0]);
+    }(0, 1, 2));
+}
+
+testcase();