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

sandbox/linux/seccomp/securemem.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 SECURE_MEM_H__
 #define SECURE_MEM_H__
 
 #include <stdlib.h>
 
 namespace playground {
@@ skipping 83 matching lines @@
         // for unrestricted system calls.
         long             tmpSyscallNum;
         void*            tmpArg1;
         void*            tmpArg2;
         void*            tmpArg3;
         void*            tmpArg4;
         void*            tmpArg5;
         void*            tmpArg6;
         void*            tmpReturnValue;
 
+        // Scratch space used to return the result of a rdtsc instruction
+        int              rdtscpEax;
+        int              rdtscpEdx;
+        int              rdtscpEcx;
+
         // We often have long sequences of calls to gettimeofday(). This is
         // needlessly expensive. Coalesce them into a single call.
-        long             lastSyscallNum;
+        int              lastSyscallNum;
         int              gettimeofdayCounter;
+
+        // For debugging purposes, we want to be able to log messages. This can
+        // result in additional system calls. Make sure that we don't trigger
+        // logging of those recursive calls.
+        int              recursionLevel;
       } __attribute__((packed));
       char               scratchPage[4096];
     };
   } __attribute__((packed)) Args;
 
   // Allows the trusted process to check whether the parent process still
   // exists. If it doesn't, kill the trusted process.
   static void dieIfParentDied(int parentProc);
 
   // The trusted process received a system call that it intends to deny.
@@ skipping 60 matching lines @@
   static void sendSystemCallInternal(int fd, bool locked, int parentProc,
                                      Args* mem, int syscallNum, void* arg1 = 0,
                                      void* arg2 = 0, void* arg3 = 0,
                                      void* arg4 = 0, void* arg5 = 0,
                                      void* arg6 = 0);
 };
 
 } // namespace
 
 #endif // SECURE_MEM_H__