Compute and pring the time that it takes to execute system calls. This data...

sandbox/linux/seccomp/debug.h

 // Copyright (c) 2010 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.
 
 #ifndef DEBUG_H__
 #define DEBUG_H__
 
 #include <map>
 #include <stdio.h>
 #include <stdlib.h>
@@ skipping 13 matching lines @@
   #if defined(__x86_64__)
   __attribute__((visibility("internal")))
   #endif
   ;
   #else
   { }
   #endif
 
   // If debugging is enabled, write the name of the syscall and an optional
   // message to stderr.
-  static void syscall(int sysnum, const char* msg, int call = -1)
+  static void syscall(long long* tm, int sysnum,
+                      const char* msg, int call = -1)
   #ifndef NDEBUG
   ;
   #else
   { }
   #endif
 
+  // Print how much wall-time has elapsed since the last call to syscall()
+  static void elapsed(long long tm, int sysnum, int call = -1)
+  #ifndef NDEBUG
+  ;
+  #else
+  {
+  }
+  #endif
+
   // Check whether debugging is enabled.
   static bool isEnabled() {
     #ifndef NDEBUG
     return enabled_;
     #else
     return false;
     #endif
   }
 
  private:
   #ifndef NDEBUG
   Debug();
+  static bool  enter();
+  static bool  leave();
+  static void  _message(const char* msg);
+  static void  gettimeofday(long long* tm);
   static char* itoa(char* s, int n);
 
   static Debug debug_;
 
   static bool  enabled_;
-  static int  numSyscallNames_;
+  static int   numSyscallNames_;
   static const char **syscallNames_;
   static std::map<int, std::string> syscallNamesMap_;
   #endif
 };
 
 } // namespace
 
 #endif // DEBUG_H__