Support verified heap pointer writes on ia32.

runtime/vm/pages.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/pages.h"
 
 #include "platform/assert.h"
 #include "vm/compiler_stats.h"
 #include "vm/gc_marker.h"
 #include "vm/gc_sweeper.h"
 #include "vm/lockers.h"
 #include "vm/object.h"
 #include "vm/thread.h"
+#include "vm/verified_memory.h"
 #include "vm/virtual_memory.h"
 
 namespace dart {
 
 DEFINE_FLAG(int, heap_growth_rate, 0,
             "The max number of pages the heap can grow at a time");
 DEFINE_FLAG(int, old_gen_growth_space_ratio, 20,
             "The desired maximum percentage of free space after old gen GC");
 DEFINE_FLAG(int, old_gen_growth_time_ratio, 3,
             "The desired maximum percentage of time spent in old gen GC");
@@ skipping 28 matching lines @@
   HeapPage* result = reinterpret_cast<HeapPage*>(memory->address());
   result->memory_ = memory;
   result->next_ = NULL;
   result->executable_ = is_executable;
   return result;
 }
 
 
 HeapPage* HeapPage::Allocate(intptr_t size_in_words, PageType type) {
   VirtualMemory* memory =
-      VirtualMemory::Reserve(size_in_words << kWordSizeLog2);
+      VerifiedMemory::Reserve(size_in_words << kWordSizeLog2);
   return Initialize(memory, type);
 }
 
 
 void HeapPage::Deallocate() {
   // The memory for this object will become unavailable after the delete below.
   delete memory_;
 }
 
 
@@ skipping 927 matching lines @@
     return 0;
   } else {
     ASSERT(total_time >= gc_time);
     int result= static_cast<int>((static_cast<double>(gc_time) /
                              static_cast<double>(total_time)) * 100);
     return result;
   }
 }
 
 }  // namespace dart