Issue 485: Fix leak of builtins object through call and apply functions.

Review URL: http://codereview.chromium.org/345007


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3164 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/builtins-arm.cc

@@ -949,6 +949,8 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
     const int kGlobalIndex =
         Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
     __ ldr(r2, FieldMemOperand(cp, kGlobalIndex));
+    __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalContextOffset));
+    __ ldr(r2, FieldMemOperand(r2, kGlobalIndex));
     __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalReceiverOffset));
 
     __ bind(&patch_receiver);
@@ -1107,6 +1109,8 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   const int kGlobalOffset =
       Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
   __ ldr(r0, FieldMemOperand(cp, kGlobalOffset));
+  __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalContextOffset));
+  __ ldr(r0, FieldMemOperand(r0, kGlobalOffset));
   __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
 
   // Push the receiver.

src/ia32/builtins-ia32.cc

@@ -462,6 +462,8 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
     const int kGlobalIndex =
         Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
     __ mov(ebx, FieldOperand(esi, kGlobalIndex));
+    __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalContextOffset));
+    __ mov(ebx, FieldOperand(ebx, kGlobalIndex));
     __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
 
     __ bind(&patch_receiver);
@@ -606,6 +608,8 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   const int kGlobalOffset =
       Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
   __ mov(ebx, FieldOperand(esi, kGlobalOffset));
+  __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalContextOffset));
+  __ mov(ebx, FieldOperand(ebx, kGlobalOffset));
   __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
 
   // Push the receiver.

src/x64/builtins-x64.cc

@@ -246,6 +246,8 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
     const int kGlobalIndex =
         Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
     __ movq(rbx, FieldOperand(rsi, kGlobalIndex));
+    __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalContextOffset));
+    __ movq(rbx, FieldOperand(rbx, kGlobalIndex));
     __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
 
     __ bind(&patch_receiver);
@@ -400,6 +402,8 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   const int kGlobalOffset =
       Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
   __ movq(rbx, FieldOperand(rsi, kGlobalOffset));
+  __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalContextOffset));
+  __ movq(rbx, FieldOperand(rbx, kGlobalOffset));
   __ movq(rbx, FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
 
   // Push the receiver.

test/mjsunit/regress/regress-485.js

+// 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=485
+
+// Ensure that we don't expose the builtins object when calling
+// builtin functions that use or return "this".
+
+var global = this;
+var global2 = (function(){return this;})();
+assertEquals(global, global2, "direct call to local function returns global");
+
+var builtin = Object.prototype.valueOf;  // Builtin function that returns this.
+
+assertEquals(global, builtin(), "Direct call to builtin");
+
+assertEquals(global, builtin.call(), "call() to builtin");
+assertEquals(global, builtin.call(null), "call(null) to builtin");
+assertEquals(global, builtin.call(undefined), "call(undefined) to builtin");
+
+assertEquals(global, builtin.apply(), "apply() to builtin");
+assertEquals(global, builtin.apply(null), "apply(null) to builtin");
+assertEquals(global, builtin.apply(undefined), "apply(undefined) to builtin");
+
+assertEquals(global, builtin.call.call(builtin), "call.call() to builtin");
+assertEquals(global, builtin.call.apply(builtin), "call.apply() to builtin");
+assertEquals(global, builtin.apply.call(builtin), "apply.call() to builtin");
+assertEquals(global, builtin.apply.apply(builtin), "apply.apply() to builtin");
+
+
+// Builtin that depends on value of this to compute result.
+var builtin2 = Object.prototype.toString;
+
+// Global object has class "Object" according to Object.prototype.toString.
+// Builtins object displays as "[object builtins]".
+assertTrue("[object builtins]" != builtin2(), "Direct call to toString");
+assertTrue("[object builtins]" != builtin2.call(), "call() to toString");
+assertTrue("[object builtins]" != builtin2.apply(), "call() to toString");
+assertTrue("[object builtins]" != builtin2.call.call(builtin2),
+           "call.call() to toString");