Instrumenting QUIC code to find jank in GetConnectionDescriptionString

net/base/net_util_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 "net/base/net_util.h"
 
 #include <iphlpapi.h>
 #include <wlanapi.h>
 
 #include <algorithm>
 
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/windows_version.h"
 #include "net/base/escape.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
@@ skipping 168 matching lines @@
   result = GetAdaptersAddresses(AF_UNSPEC, flags, NULL, adapters, &len);
   if (result != NO_ERROR) {
     LOG(ERROR) << "GetAdaptersAddresses failed: " << result;
     return false;
   }
 
   return internal::GetNetworkListImpl(networks, policy, is_xp, adapters);
 }
 
 WifiPHYLayerProtocol GetWifiPHYLayerProtocol() {
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile1(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol1"));
   const internal::WlanApi& wlanapi = internal::WlanApi::GetInstance();
   if (!wlanapi.initialized)
     return WIFI_PHY_LAYER_PROTOCOL_NONE;
 
   internal::WlanHandle client;
   DWORD cur_version = 0;
   const DWORD kMaxClientVersion = 2;
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile2(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol2"));
   DWORD result = wlanapi.OpenHandle(kMaxClientVersion, &cur_version, &client);
   if (result != ERROR_SUCCESS)
     return WIFI_PHY_LAYER_PROTOCOL_NONE;
 
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile3(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol3"));
   WLAN_INTERFACE_INFO_LIST* interface_list_ptr = NULL;
   result = wlanapi.enum_interfaces_func(client.Get(), NULL,
                                         &interface_list_ptr);
   if (result != ERROR_SUCCESS)
     return WIFI_PHY_LAYER_PROTOCOL_NONE;
   scoped_ptr<WLAN_INTERFACE_INFO_LIST, internal::WlanApiDeleter> interface_list(
       interface_list_ptr);
 
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile4(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol4"));
   // Assume at most one connected wifi interface.
   WLAN_INTERFACE_INFO* info = NULL;
   for (unsigned i = 0; i < interface_list->dwNumberOfItems; ++i) {
     if (interface_list->InterfaceInfo[i].isState ==
         wlan_interface_state_connected) {
       info = &interface_list->InterfaceInfo[i];
       break;
     }
   }
 
   if (info == NULL)
     return WIFI_PHY_LAYER_PROTOCOL_NONE;
 
   WLAN_CONNECTION_ATTRIBUTES* conn_info_ptr;
   DWORD conn_info_size = 0;
   WLAN_OPCODE_VALUE_TYPE op_code;
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile5(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol5"));
   result = wlanapi.query_interface_func(
       client.Get(), &info->InterfaceGuid, wlan_intf_opcode_current_connection,
       NULL, &conn_info_size, reinterpret_cast<VOID**>(&conn_info_ptr),
       &op_code);
   if (result != ERROR_SUCCESS)
     return WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
   scoped_ptr<WLAN_CONNECTION_ATTRIBUTES, internal::WlanApiDeleter> conn_info(
       conn_info_ptr);
 
   switch (conn_info->wlanAssociationAttributes.dot11PhyType) {
@@ skipping 71 matching lines @@
 scoped_ptr<ScopedWifiOptions> SetWifiOptions(int options) {
   return scoped_ptr<ScopedWifiOptions>(new WifiOptionSetter(options));
 }
 
 std::string GetWifiSSID() {
   NOTIMPLEMENTED();
   return "";
 }
 
 }  // namespace net