Landing: Write protect executable pages in the VM.

runtime/vm/assembler_ia32.cc

 // Copyright (c) 2013, 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/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/heap.h"
@@ skipping 62 matching lines @@
 
 
 class DirectCallRelocation : public AssemblerFixup {
  public:
   void Process(const MemoryRegion& region, intptr_t position) {
     // Direct calls are relative to the following instruction on x86.
     int32_t pointer = region.Load<int32_t>(position);
     int32_t delta = region.start() + position + sizeof(int32_t);
     region.Store<int32_t>(position, pointer - delta);
   }
+
+  virtual bool IsPointerOffset() const { return false; }
 };
 
 
 int32_t Assembler::jit_cookie() {
   if (jit_cookie_ == 0) {
     jit_cookie_ = static_cast<int32_t>(
         Isolate::Current()->random()->NextUInt32());
   }
   return jit_cookie_;
 }
@@ skipping 2503 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32