Added more logging in debug builds for some failure passes, hopefully this...

base/message_pump_libevent.cc

 // Copyright (c) 2008 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/message_pump_libevent.h"
 
 #include <fcntl.h>
+#include <errno.h>
 
 #include "base/logging.h"
 #include "base/scoped_nsautorelease_pool.h"
 #include "base/time.h"
 #include "third_party/libevent/event.h"
 
 namespace base {
 
 // Return 0 on success
 // Too small a function to bother putting in a library?
@@ skipping 56 matching lines @@
       in_run_(false),
       event_base_(event_base_new()),
       wakeup_pipe_in_(-1),
       wakeup_pipe_out_(-1) {
   if (!Init())
      NOTREACHED();
 }
 
 bool MessagePumpLibevent::Init() {
   int fds[2];
-  if (pipe(fds))
+  if (pipe(fds)) {
+    DLOG(ERROR) << "pipe() failed, errno: " << errno;
     return false;
-  if (SetNonBlocking(fds[0]))
+  }
+  if (SetNonBlocking(fds[0])) {
+    DLOG(ERROR) << "SetNonBlocking for pipe fd[0] failed, errno: " << errno;
     return false;
-  if (SetNonBlocking(fds[1]))
+  }
+  if (SetNonBlocking(fds[1])) {
+    DLOG(ERROR) << "SetNonBlocking for pipe fd[1] failed, errno: " << errno;
     return false;
+  }
   wakeup_pipe_out_ = fds[0];
   wakeup_pipe_in_ = fds[1];
 
   wakeup_event_ = new event;
   event_set(wakeup_event_, wakeup_pipe_out_, EV_READ | EV_PERSIST,
             OnWakeup, this);
   event_base_set(event_base_, wakeup_event_);
 
   if (event_add(wakeup_event_, 0))
     return false;
@@ skipping 143 matching lines @@
 }
 
 void MessagePumpLibevent::ScheduleDelayedWork(const Time& delayed_work_time) {
   // We know that we can't be blocked on Wait right now since this method can
   // only be called on the same thread as Run, so we only need to update our
   // record of how long to sleep when we do sleep.
   delayed_work_time_ = delayed_work_time;
 }
 
 }  // namespace base