variables_.Declare(this, Factory::this_symbol(), Variable::VAR,
false, Variable::THIS);
var->rewrite_ = new Slot(var, Slot::PARAMETER, -1);
- receiver_ = new VariableProxy(Factory::this_symbol(), true, false);
- receiver_->BindTo(var);
+ receiver_ = var;
if (is_function_scope()) {
// Declare 'arguments' variable which exists in all functions.
// ---------------------------------------------------------------------------
// Accessors.
- // The variable corresponding to the (function) receiver.
- VariableProxy* receiver() const { return receiver_; }
+ // A new variable proxy corresponding to the (function) receiver.
+ VariableProxy* receiver() const {
+ VariableProxy* proxy =
+ new VariableProxy(Factory::this_symbol(), true, false);
+ proxy->BindTo(receiver_);
+ return proxy;
+ }
// The variable holding the function literal for named function
// literals, or NULL.
// Declarations.
ZoneList<Declaration*> decls_;
// Convenience variable.
- VariableProxy* receiver_;
+ Variable* receiver_;
// Function variable, if any; function scopes only.
Variable* function_;
// Convenience variable; function scopes only.
--- /dev/null
+// Copyright 2009 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.
+
+// See: http://code.google.com/p/v8/issues/detail?id=545
+// and: http://code.google.com/p/chromium/issues/detail?id=28353
+
+// The "this" variable proxy was reused. If context annotations differ between
+// uses, this can cause a use in a value context to assume a test context. Since
+// it has no true/false labels set, it causes a null-pointer dereference and
+// segmentation fault.
+
+// Code should not crash:
+
+// Original bug report by Robert Swiecki (wrapped to not throw):
+try {
+ new IsPrimitive(load())?this.join():String(' ').charCodeAt((!this>Math));
+} catch (e) {}
+
+// Shorter examples:
+
+this + !this;
+
+this + (this ? 1 : 2);