[builtins] Sanitize receiver patching for API functions.

src/mips/builtins-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1208 matching lines @@
 
 // Clobbers {t2, t3, t4, t5}.
 static void CompatibleReceiverCheck(MacroAssembler* masm, Register receiver,
                                     Register function_template_info,
                                     Label* receiver_check_failed) {
   Register signature = t2;
   Register map = t3;
   Register constructor = t4;
   Register scratch = t5;
 
-  // If the receiver is not an object, jump to receiver_check_failed.
-  __ GetObjectType(receiver, map, scratch);
-  __ Branch(receiver_check_failed, lo, scratch, Operand(FIRST_JS_OBJECT_TYPE));
-
   // If there is no signature, return the holder.
   __ lw(signature, FieldMemOperand(function_template_info,
                                    FunctionTemplateInfo::kSignatureOffset));
   Label receiver_check_passed;
   __ JumpIfRoot(signature, Heap::kUndefinedValueRootIndex,
                 &receiver_check_passed);
 
   // Walk the prototype chain.
   Label prototype_loop_start;
   __ bind(&prototype_loop_start);
@@ skipping 46 matching lines @@
   // ----------- S t a t e -------------
   //  -- a0                 : number of arguments excluding receiver
   //  -- a1                 : callee
   //  -- ra                 : return address
   //  -- sp[0]              : last argument
   //  -- ...
   //  -- sp[4 * (argc - 1)] : first argument
   //  -- sp[4 * argc]       : receiver
   // -----------------------------------
 
-  // Load the receiver.
-  __ sll(at, a0, kPointerSizeLog2);
-  __ Addu(t8, sp, at);
-  __ lw(t0, MemOperand(t8));
-
-  // Update the receiver if this is a contextual call.
-  Label set_global_proxy, valid_receiver;
-  __ JumpIfRoot(t0, Heap::kUndefinedValueRootIndex, &set_global_proxy);
-
   // Load the FunctionTemplateInfo.
-  __ bind(&valid_receiver);
   __ lw(t1, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   __ lw(t1, FieldMemOperand(t1, SharedFunctionInfo::kFunctionDataOffset));
 
   // Do the compatible receiver check.
   Label receiver_check_failed;
+  __ sll(at, a0, kPointerSizeLog2);
+  __ Addu(t8, sp, at);
+  __ lw(t0, MemOperand(t8));
   CompatibleReceiverCheck(masm, t0, t1, &receiver_check_failed);
 
   // Get the callback offset from the FunctionTemplateInfo, and jump to the
   // beginning of the code.
   __ lw(t2, FieldMemOperand(t1, FunctionTemplateInfo::kCallCodeOffset));
   __ lw(t2, FieldMemOperand(t2, CallHandlerInfo::kFastHandlerOffset));
   __ Addu(t2, t2, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Jump(t2);
 
-  __ bind(&set_global_proxy);
-  __ LoadGlobalProxy(t0);
-  __ sw(t0, MemOperand(t8));
-  __ Branch(&valid_receiver);
-
   // Compatible receiver check failed: throw an Illegal Invocation exception.
   __ bind(&receiver_check_failed);
   // Drop the arguments (including the receiver);
   __ Addu(t8, t8, Operand(kPointerSize));
   __ addu(sp, t8, zero_reg);
   __ TailCallRuntime(Runtime::kThrowIllegalInvocation);
 }
 
 
 void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
@@ skipping 1127 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS