chrome/browser/android/seccomp_support_detector.h

   1 // Copyright 2015 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 CHROME_BROWSER_ANDROID_SECCOMP_SUPPORT_DETECTOR_H_
   6 #define CHROME_BROWSER_ANDROID_SECCOMP_SUPPORT_DETECTOR_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10
  11 // This class is used to report via UMA the Android kernel version and
  12 // level of seccomp-bpf support. The operations are performed on the
  13 // blocking thread pool.
  14 class SeccompSupportDetector
  15     : public base::RefCountedThreadSafe<SeccompSupportDetector> {
  16  public:
  17   // Starts the detection process. This should be called once per browser
  18   // session. This is safe to call from any thread.
  19   static void StartDetection();
  20
  21  private:
  22   friend class base::RefCountedThreadSafe<SeccompSupportDetector>;
  23
  24   SeccompSupportDetector();
  25   ~SeccompSupportDetector();
  26
  27   // Called on the blocking thread pool. This reads the utsname and records
  28   // the kernel version.
  29   void DetectKernelVersion();
  30
  31   // Called on the blocking thread pool. This tests whether the system
  32   // supports PR_SET_SECCOMP.
  33   void DetectSeccomp();
  34
  35   DISALLOW_COPY_AND_ASSIGN(SeccompSupportDetector);
  36 };
  37
  38 #endif  // CHROME_BROWSER_ANDROID_SECCOMP_SUPPORT_DETECTOR_H_