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

sandbox/linux/seccomp/mmap.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 {
 
 void* Sandbox::sandbox_mmap(void *start, size_t length, int prot, int flags,
                           int fd, off_t offset) {
-  Debug::syscall(__NR_mmap, "Executing handler");
+  long long tm;
+  Debug::syscall(&tm, __NR_mmap, "Executing handler");
   struct {
     int       sysnum;
     long long cookie;
     MMap      mmap_req;
   } __attribute__((packed)) request;
   request.sysnum          = __NR_MMAP;
   request.cookie          = cookie();
   request.mmap_req.start  = start;
   request.mmap_req.length = length;
   request.mmap_req.prot   = prot;
   request.mmap_req.flags  = flags;
   request.mmap_req.fd     = fd;
   request.mmap_req.offset = offset;
 
   void* rc;
   SysCalls sys;
   if (write(sys, processFdPub(), &request, sizeof(request)) !=
       sizeof(request) ||
       read(sys, threadFdPub(), &rc, sizeof(rc)) != sizeof(rc)) {
     die("Failed to forward mmap() request [sandbox]");
   }
+  Debug::elapsed(tm, __NR_mmap);
   return rc;
 }
 
 bool Sandbox::process_mmap(int parentMapsFd, int sandboxFd, int threadFdPub,
                            int threadFd, SecureMem::Args* mem) {
   // Read request
   SysCalls sys;
   MMap mmap_req;
   if (read(sys, sandboxFd, &mmap_req, sizeof(mmap_req)) != sizeof(mmap_req)) {
     die("Failed to read parameters for mmap() [process]");
@@ skipping 20 matching lines @@
   }
 
   // All other mmap() requests are OK
   SecureMem::sendSystemCall(threadFdPub, false, -1, mem, __NR_MMAP,
                             mmap_req.start, mmap_req.length, mmap_req.prot,
                             mmap_req.flags, mmap_req.fd, mmap_req.offset);
   return true;
 }
 
 } // namespace