1 files changed, 52 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/process/process_handle_win.cc b/security/sandbox/chromium/base/process/process_handle_win.cc
new file mode 100644
index 0000000000..ccc759039d
--- /dev/null
+++ b/security/sandbox/chromium/base/process/process_handle_win.cc
@@ -0,0 +1,52 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/process/process_handle.h"
+
+#include <windows.h>
+#include <tlhelp32.h>
+
+#include "base/win/scoped_handle.h"
+#include "base/win/windows_version.h"
+
+namespace base {
+
+ProcessId GetCurrentProcId() {
+  return ::GetCurrentProcessId();
+}
+
+ProcessHandle GetCurrentProcessHandle() {
+  return ::GetCurrentProcess();
+}
+
+ProcessId GetProcId(ProcessHandle process) {
+  if (process == base::kNullProcessHandle)
+    return 0;
+  // This returns 0 if we have insufficient rights to query the process handle.
+  // Invalid handles or non-process handles will cause a hard failure.
+  ProcessId result = GetProcessId(process);
+  CHECK(result != 0 || GetLastError() != ERROR_INVALID_HANDLE)
+      << "process handle = " << process;
+  return result;
+}
+
+ProcessId GetParentProcessId(ProcessHandle process) {
+  ProcessId child_pid = GetProcId(process);
+  PROCESSENTRY32 process_entry;
+      process_entry.dwSize = sizeof(PROCESSENTRY32);
+
+  win::ScopedHandle snapshot(CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0));
+  if (snapshot.IsValid() && Process32First(snapshot.Get(), &process_entry)) {
+    do {
+      if (process_entry.th32ProcessID == child_pid)
+        return process_entry.th32ParentProcessID;
+    } while (Process32Next(snapshot.Get(), &process_entry));
+  }
+
+  // TODO(zijiehe): To match other platforms, -1 (UINT32_MAX) should be returned
+  // if |child_id| cannot be found in the |snapshot|.
+  return 0u;
+}
+
+}  // namespace base