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

sandbox/linux/seccomp/mprotect.cc

 // 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.
 
 #include "debug.h"
 #include "sandbox_impl.h"
 
 namespace playground {
 
 int Sandbox::sandbox_mprotect(const void *addr, size_t len, int prot) {
-  Debug::syscall(__NR_mprotect, "Executing handler");
+  long long tm;
+  Debug::syscall(&tm, __NR_mprotect, "Executing handler");
   struct {
     int       sysnum;
     long long cookie;
     MProtect  mprotect_req;
   } __attribute__((packed)) request;
   request.sysnum            = __NR_mprotect;
   request.cookie            = cookie();
   request.mprotect_req.addr = addr;
   request.mprotect_req.len  = len;
   request.mprotect_req.prot = prot;
 
   long rc;
   SysCalls sys;
   if (write(sys, processFdPub(), &request, sizeof(request)) !=
       sizeof(request) ||
       read(sys, threadFdPub(), &rc, sizeof(rc)) != sizeof(rc)) {
     die("Failed to forward mprotect() request [sandbox]");
   }
+  Debug::elapsed(tm, __NR_mprotect);
   return static_cast<int>(rc);
 }
 
 bool Sandbox::process_mprotect(int parentMapsFd, int sandboxFd,
                                int threadFdPub, int threadFd,
                                SecureMem::Args* mem) {
   // Read request
   SysCalls sys;
   MProtect mprotect_req;
   if (read(sys, sandboxFd, &mprotect_req, sizeof(mprotect_req)) !=
@@ skipping 22 matching lines @@
 
   // Changing permissions on memory regions that were newly mapped inside of
   // the sandbox is OK.
   SecureMem::sendSystemCall(threadFdPub, false, -1, mem, __NR_mprotect,
                             mprotect_req.addr,  mprotect_req.len,
                             mprotect_req.prot);
   return true;
 }
 
 } // namespace