Outputting command line if CreateProcess() fails.

base/process/launch_win.cc

 // Copyright (c) 2012 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 "base/process/launch.h"
 
 #include <fcntl.h>
 #include <io.h>
 #include <shellapi.h>
 #include <windows.h>
 #include <userenv.h>
 #include <psapi.h>
 
 #include <ios>
 #include <limits>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/process/kill.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/sys_info.h"
 #include "base/win/object_watcher.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/scoped_process_information.h"
 #include "base/win/startup_information.h"
 #include "base/win/windows_version.h"
 
 // userenv.dll is required for CreateEnvironmentBlock().
 #pragma comment(lib, "userenv.lib")
 
@@ skipping 150 matching lines @@
     }
 
     BOOL launched =
         CreateProcessAsUser(options.as_user, NULL,
                             const_cast<wchar_t*>(cmdline.c_str()),
                             NULL, NULL, inherit_handles, flags,
                             enviroment_block, NULL, startup_info,
                             &temp_process_info);
     DestroyEnvironmentBlock(enviroment_block);
     if (!launched) {
-      DPLOG(ERROR);
+      DPLOG(ERROR) << "Command line:" << std::endl << UTF16ToUTF8(cmdline)
+                   << std::endl;;
       return false;
     }
   } else {
     if (!CreateProcess(NULL,
                        const_cast<wchar_t*>(cmdline.c_str()), NULL, NULL,
                        inherit_handles, flags, NULL, NULL,
                        startup_info, &temp_process_info)) {
-      DPLOG(ERROR);
+      DPLOG(ERROR) << "Command line:" << std::endl << UTF16ToUTF8(cmdline)
+                   << std::endl;;
       return false;
     }
   }
   base::win::ScopedProcessInformation process_info(temp_process_info);
 
   if (options.job_handle) {
     if (0 == AssignProcessToJobObject(options.job_handle,
                                       process_info.process_handle())) {
       DLOG(ERROR) << "Could not AssignProcessToObject.";
       KillProcess(process_info.process_handle(), kProcessKilledExitCode, true);
@@ skipping 144 matching lines @@
   WaitForSingleObject(proc_info.process_handle(), INFINITE);
 
   return true;
 }
 
 void RaiseProcessToHighPriority() {
   SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
 }
 
 }  // namespace base