[heap] Disallow allocation on the last page in address range

src/x87/macro-assembler-x87.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_X87
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1496 matching lines @@
     add(result, Immediate(kDoubleSize / 2));
     bind(&aligned);
   }
 
   // Calculate new top and bail out if space is exhausted.
   Register top_reg = result_end.is_valid() ? result_end : result;
   if (!top_reg.is(result)) {
     mov(top_reg, result);
   }
   add(top_reg, Immediate(object_size));
-  j(carry, gc_required);
   cmp(top_reg, Operand::StaticVariable(allocation_limit));
   j(above, gc_required);
 
   // Update allocation top.
   UpdateAllocationTopHelper(top_reg, scratch, flags);
 
   // Tag result if requested.
   bool tag_result = (flags & TAG_OBJECT) != 0;
   if (top_reg.is(result)) {
     if (tag_result) {
@@ skipping 1744 matching lines @@
   mov(eax, dividend);
   shr(eax, 31);
   add(edx, eax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87