win: Support reading process info cross-bitness

util/win/process_info.h

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #ifndef CRASHPAD_UTIL_WIN_PROCESS_INFO_H_
 #define CRASHPAD_UTIL_WIN_PROCESS_INFO_H_
 
-#include <basetsd.h>
 #include <sys/types.h>
 #include <windows.h>
-#include <winternl.h>
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "util/misc/initialization_state_dcheck.h"
 
 namespace crashpad {
 
-namespace internal {
-
-//! \brief This structure matches PROCESS_BASIC_INFORMATION in winternl.h but
-//!     gives names to the Reserved fields (matching the WDK's ntddk.h).
-struct FULL_PROCESS_BASIC_INFORMATION {
-  NTSTATUS ExitStatus;
-  PPEB PebBaseAddress;
-  KAFFINITY AffinityMask;
-  PVOID BasePriority;
-  ULONG_PTR UniqueProcessId;
-  ULONG_PTR InheritedFromUniqueProcessId;
-};
-
-}  // namespace internal
-
 //! \brief Gathers information about a process given its `HANDLE`. This consists
 //!     primarily of information stored in the Process Environment Block.
 class ProcessInfo {
  public:
   ProcessInfo();
   ~ProcessInfo();
 
   //! \brief Initializes this object with information about the given
   //!     \a process.
   //!
@@ skipping 21 matching lines @@
   bool CommandLine(std::wstring* command_line) const;
 
   //! \brief Retrieves the modules loaded into the target process.
   //!
   //! The modules are enumerated in initialization order as detailed in the
   //!     Process Environment Block. The main executable will always be the
   //!     first element.
   bool Modules(std::vector<std::wstring>* modules) const;
 
  private:
-  internal::FULL_PROCESS_BASIC_INFORMATION process_basic_information_;
+  template <class T>
+  friend bool ReadProcessData(HANDLE process,
+                              uintptr_t peb_address_uintptr,
+                              ProcessInfo* process_info);
+
+  pid_t process_id_;
+  pid_t inherited_from_process_id_;
   std::wstring command_line_;
   std::vector<std::wstring> modules_;
   bool is_64_bit_;
   bool is_wow64_;
   InitializationStateDcheck initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessInfo);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_WIN_PROCESS_INFO_H_