Refactor and cleanup VirtualMemory.

src/deoptimizer.cc

 // Copyright 2013 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
@@ skipping 24 matching lines @@
 #include "global-handles.h"
 #include "macro-assembler.h"
 #include "prettyprinter.h"
 
 
 namespace v8 {
 namespace internal {
 
 static MemoryChunk* AllocateCodeChunk(MemoryAllocator* allocator) {
   return allocator->AllocateChunk(Deoptimizer::GetMaxDeoptTableSize(),
-                                  OS::CommitPageSize(),
-#if defined(__native_client__)
-  // The Native Client port of V8 uses an interpreter,
-  // so code pages don't need PROT_EXEC.
-                                  NOT_EXECUTABLE,
-#else
-                                  EXECUTABLE,
-#endif
+                                  VirtualMemory::GetPageSize(),
+                                  VirtualMemory::EXECUTABLE,
                                   NULL);
 }
 
 
 DeoptimizerData::DeoptimizerData(MemoryAllocator* allocator)
     : allocator_(allocator),
 #ifdef ENABLE_DEBUGGER_SUPPORT
       deoptimized_frame_info_(NULL),
 #endif
       current_(NULL) {
@@ skipping 58 matching lines @@
 }
 
 
 // No larger than 2K on all platforms
 static const int kDeoptTableMaxEpilogueCodeSize = 2 * KB;
 
 
 size_t Deoptimizer::GetMaxDeoptTableSize() {
   int entries_size =
       Deoptimizer::kMaxNumberOfEntries * Deoptimizer::table_entry_size_;
-  int commit_page_size = static_cast<int>(OS::CommitPageSize());
+  int commit_page_size = static_cast<int>(VirtualMemory::GetPageSize());
   int page_count = ((kDeoptTableMaxEpilogueCodeSize + entries_size - 1) /
                     commit_page_size) + 1;
   return static_cast<size_t>(commit_page_size * page_count);
 }
 
 
 Deoptimizer* Deoptimizer::Grab(Isolate* isolate) {
   Deoptimizer* result = isolate->deoptimizer_data()->current_;
   ASSERT(result != NULL);
   result->DeleteFrameDescriptions();
@@ skipping 2909 matching lines @@
 
 void DeoptimizedFrameInfo::Iterate(ObjectVisitor* v) {
   v->VisitPointer(BitCast<Object**>(&function_));
   v->VisitPointers(parameters_, parameters_ + parameters_count_);
   v->VisitPointers(expression_stack_, expression_stack_ + expression_count_);
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal