[NaCl SDK] Add some more logging to nacl_io.

native_client_sdk/src/libraries/nacl_io/filesystem.cc

 // Copyright 2013 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 "nacl_io/filesystem.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stdarg.h>
 
 #include <string>
 
 #include "nacl_io/dir_node.h"
+#include "nacl_io/log.h"
 #include "nacl_io/node.h"
 #include "nacl_io/osstat.h"
 #include "nacl_io/path.h"
 #include "sdk_util/auto_lock.h"
 #include "sdk_util/ref_object.h"
 
 #if defined(WIN32)
 #include <windows.h>
 #endif
 
 namespace nacl_io {
 
 Filesystem::Filesystem() : dev_(0) {
 }
 
 Filesystem::~Filesystem() {
 }
 
 Error Filesystem::Init(const FsInitArgs& args) {
   dev_ = args.dev;
   ppapi_ = args.ppapi;
   return 0;
 }
 
 void Filesystem::Destroy() {
 }
 
 Error Filesystem::OpenResource(const Path& path, ScopedNode* out_node) {
   out_node->reset(NULL);
+  LOG_TRACE("Can't open resource: %s", path.Join().c_str());
   return EINVAL;
 }
 
 void Filesystem::OnNodeCreated(Node* node) {
   node->stat_.st_ino = inode_pool_.Acquire();
   node->stat_.st_dev = dev_;
 }
 
 void Filesystem::OnNodeDestroyed(Node* node) {
   if (node->stat_.st_ino)
     inode_pool_.Release(node->stat_.st_ino);
 }
 
 Error Filesystem::Filesystem_VIoctl(int request, va_list args) {
+  LOG_ERROR("Unsupported ioctl: %#x", request);
   return EINVAL;
 }
 
 Error Filesystem::Filesystem_Ioctl(int request, ...) {
   va_list args;
   va_start(args, request);
   Error error = Filesystem_VIoctl(request, args);
   va_end(args);
   return error;
 }
 
 }  // namespace nacl_io