[base] Fix check that makes sure we commit in the virtual memory range.

src/base/platform/platform.h

 // 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.
 
 // This module contains the platform-specific code. This make the rest of the
 // code less dependent on operating system, compilers and runtime libraries.
 // This module does specifically not deal with differences between different
 // processor architecture.
 // The platform classes have the same definition for all platforms. The
 // implementation for a particular platform is put in platform_<os>.cc.
@@ skipping 345 matching lines @@
   // and the same size it was reserved with.
   static bool ReleaseRegion(void* base, size_t size);
 
   // Returns true if OS performs lazy commits, i.e. the memory allocation call
   // defers actual physical memory allocation till the first memory access.
   // Otherwise returns false.
   static bool HasLazyCommits();
 
  private:
   bool InVM(void* address, size_t size) {
-    return (reinterpret_cast<intptr_t>(address_) <=
-            reinterpret_cast<intptr_t>(address)) &&
-           (reinterpret_cast<intptr_t>(address_) + size_ >=
-            reinterpret_cast<intptr_t>(address) + size);
+    return (reinterpret_cast<uintptr_t>(address_) <=
+            reinterpret_cast<uintptr_t>(address)) &&
+           ((reinterpret_cast<uintptr_t>(address_) + size_) >=
+            (reinterpret_cast<uintptr_t>(address) + size));
   }
 
   void* address_;  // Start address of the virtual memory.
   size_t size_;  // Size of the virtual memory.
 };
 
 
 // ----------------------------------------------------------------------------
 // Thread
 //
@@ skipping 95 matching lines @@
   char name_[kMaxThreadNameLength];
   int stack_size_;
   Semaphore* start_semaphore_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 } }  // namespace v8::base
 
 #endif  // V8_BASE_PLATFORM_PLATFORM_H_