sandbox/win/src/Wow64.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SANDBOX_SRC_WOW64_H__
   6 #define SANDBOX_SRC_WOW64_H__
   7
   8 #include <windows.h>
   9
  10 #include "base/basictypes.h"
  11 #include "sandbox/win/src/sandbox_types.h"
  12
  13 namespace sandbox {
  14
  15 class TargetProcess;
  16
  17 // This class wraps the code needed to interact with the Windows On Windows
  18 // subsystem on 64 bit OSes, from the point of view of interceptions.
  19 class Wow64 {
  20  public:
  21   Wow64(TargetProcess* child, HMODULE ntdll)
  22       : child_(child), ntdll_(ntdll), dll_load_(NULL), continue_load_(NULL) {}
  23   ~Wow64();
  24
  25   // Waits for the 32 bit DLL to get loaded on the child process. This function
  26   // will return immediately if not running under WOW, or launch the helper
  27   // process and wait until ntdll is ready.
  28   bool WaitForNtdll();
  29
  30  private:
  31   // Runs the WOW helper process, passing the address of a buffer allocated on
  32   // the child (one page).
  33   bool RunWowHelper(void* buffer);
  34
  35   // This method receives "notifications" whenever a DLL is mapped on the child.
  36   bool DllMapped();
  37
  38   // Returns true if ntdll.dll is mapped on the child.
  39   bool NtdllPresent();
  40
  41   TargetProcess* child_;  // Child process.
  42   HMODULE ntdll_;         // ntdll on the parent.
  43   HANDLE dll_load_;       // Event that is signaled on dll load.
  44   HANDLE continue_load_;  // Event to signal to continue execution on the child.
  45   DISALLOW_IMPLICIT_CONSTRUCTORS(Wow64);
  46 };
  47
  48 }  // namespace sandbox
  49
  50 #endif  // SANDBOX_SRC_WOW64_H__