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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "dbus/dbus_statistics.h" |
| 6 |
| 7 #include <set> |
| 8 |
| 9 #include "base/logging.h" |
| 10 #include "base/memory/scoped_ptr.h" |
| 11 #include "base/stl_util.h" |
| 12 #include "base/stringprintf.h" |
| 13 #include "base/time.h" |
| 14 |
| 15 namespace dbus { |
| 16 |
| 17 namespace { |
| 18 |
| 19 // Used to store dbus statistics sorted alphabetically by service, interface, |
| 20 // then method (using std::string <). |
| 21 struct Stat { |
| 22 Stat(const std::string& service, |
| 23 const std::string& interface, |
| 24 const std::string& method) |
| 25 : service(service), |
| 26 interface(interface), |
| 27 method(method), |
| 28 sent_method_calls(0), |
| 29 received_signals(0), |
| 30 sent_blocking_method_calls(0) { |
| 31 } |
| 32 std::string service; |
| 33 std::string interface; |
| 34 std::string method; |
| 35 int sent_method_calls; |
| 36 int received_signals; |
| 37 int sent_blocking_method_calls; |
| 38 |
| 39 bool Compare(const Stat& other) const { |
| 40 if (service != other.service) |
| 41 return service < other.service; |
| 42 if (interface != other.interface) |
| 43 return interface < other.interface; |
| 44 return method < other.method; |
| 45 } |
| 46 |
| 47 struct PtrCompare { |
| 48 bool operator()(Stat* lhs, Stat* rhs) const { |
| 49 DCHECK(lhs && rhs); |
| 50 return lhs->Compare(*rhs); |
| 51 } |
| 52 }; |
| 53 }; |
| 54 |
| 55 typedef std::set<Stat*, Stat::PtrCompare> StatSet; |
| 56 |
| 57 //------------------------------------------------------------------------------ |
| 58 // DBusStatistics |
| 59 |
| 60 // Simple class for gathering DBus usage statistics. |
| 61 class DBusStatistics { |
| 62 public: |
| 63 DBusStatistics() : start_time_(base::Time::Now()) { |
| 64 } |
| 65 |
| 66 ~DBusStatistics() { |
| 67 STLDeleteContainerPointers(stats_.begin(), stats_.end()); |
| 68 } |
| 69 |
| 70 // Enum to specify which field in Stat to increment in AddStat |
| 71 enum StatType { |
| 72 TYPE_SENT_METHOD_CALLS, |
| 73 TYPE_RECEIVED_SIGNALS, |
| 74 TYPE_SENT_BLOCKING_METHOD_CALLS |
| 75 }; |
| 76 |
| 77 // Add a call to |method| for |interface|. See also MethodCall in message.h. |
| 78 void AddStat(const std::string& service, |
| 79 const std::string& interface, |
| 80 const std::string& method, |
| 81 StatType type) { |
| 82 Stat* stat = GetStat(service, interface, method, true); |
| 83 DCHECK(stat); |
| 84 if (type == TYPE_SENT_METHOD_CALLS) |
| 85 ++stat->sent_method_calls; |
| 86 else if (type == TYPE_RECEIVED_SIGNALS) |
| 87 ++stat->received_signals; |
| 88 else if (type == TYPE_SENT_BLOCKING_METHOD_CALLS) |
| 89 ++stat->sent_blocking_method_calls; |
| 90 else |
| 91 NOTREACHED(); |
| 92 } |
| 93 |
| 94 // Look up the Stat entry in |stats_|. If |add_stat| is true, add a new entry |
| 95 // if one does not already exist. |
| 96 Stat* GetStat(const std::string& service, |
| 97 const std::string& interface, |
| 98 const std::string& method, |
| 99 bool add_stat) { |
| 100 scoped_ptr<Stat> stat(new Stat(service, interface, method)); |
| 101 StatSet::iterator found = stats_.find(stat.get()); |
| 102 if (found != stats_.end()) |
| 103 return *found; |
| 104 if (!add_stat) |
| 105 return NULL; |
| 106 found = stats_.insert(stat.release()).first; |
| 107 return *found; |
| 108 } |
| 109 |
| 110 StatSet& stats() { return stats_; } |
| 111 base::Time start_time() { return start_time_; } |
| 112 |
| 113 private: |
| 114 StatSet stats_; |
| 115 base::Time start_time_; |
| 116 |
| 117 DISALLOW_COPY_AND_ASSIGN(DBusStatistics); |
| 118 }; |
| 119 |
| 120 DBusStatistics* g_dbus_statistics = NULL; |
| 121 |
| 122 } // namespace |
| 123 |
| 124 //------------------------------------------------------------------------------ |
| 125 |
| 126 namespace statistics { |
| 127 |
| 128 void Initialize() { |
| 129 if (g_dbus_statistics) |
| 130 delete g_dbus_statistics; // reset statistics |
| 131 g_dbus_statistics = new DBusStatistics(); |
| 132 } |
| 133 |
| 134 void Shutdown() { |
| 135 delete g_dbus_statistics; |
| 136 g_dbus_statistics = NULL; |
| 137 } |
| 138 |
| 139 void AddSentMethodCall(const std::string& service, |
| 140 const std::string& interface, |
| 141 const std::string& method) { |
| 142 if (!g_dbus_statistics) |
| 143 return; |
| 144 g_dbus_statistics->AddStat( |
| 145 service, interface, method, DBusStatistics::TYPE_SENT_METHOD_CALLS); |
| 146 } |
| 147 |
| 148 void AddReceivedSignal(const std::string& service, |
| 149 const std::string& interface, |
| 150 const std::string& method) { |
| 151 if (!g_dbus_statistics) |
| 152 return; |
| 153 g_dbus_statistics->AddStat( |
| 154 service, interface, method, DBusStatistics::TYPE_RECEIVED_SIGNALS); |
| 155 } |
| 156 |
| 157 void AddBlockingSentMethodCall(const std::string& service, |
| 158 const std::string& interface, |
| 159 const std::string& method) { |
| 160 if (!g_dbus_statistics) |
| 161 return; |
| 162 g_dbus_statistics->AddStat( |
| 163 service, interface, method, |
| 164 DBusStatistics::TYPE_SENT_BLOCKING_METHOD_CALLS); |
| 165 } |
| 166 |
| 167 // NOTE: If the output format is changed, be certain to change the test |
| 168 // expectations as well. |
| 169 std::string GetAsString(ShowInString show, FormatString format) { |
| 170 if (!g_dbus_statistics) |
| 171 return "DBusStatistics not initialized."; |
| 172 |
| 173 const StatSet& stats = g_dbus_statistics->stats(); |
| 174 if (stats.empty()) |
| 175 return "No DBus calls."; |
| 176 |
| 177 base::TimeDelta dtime = base::Time::Now() - g_dbus_statistics->start_time(); |
| 178 int dminutes = dtime.InMinutes(); |
| 179 dminutes = std::max(dminutes, 1); |
| 180 |
| 181 std::string result; |
| 182 int sent = 0, received = 0, sent_blocking = 0; |
| 183 // Stats are stored in order by service, then interface, then method. |
| 184 for (StatSet::const_iterator iter = stats.begin(); iter != stats.end(); ) { |
| 185 StatSet::const_iterator cur_iter = iter; |
| 186 StatSet::const_iterator next_iter = ++iter; |
| 187 const Stat* stat = *cur_iter; |
| 188 sent += stat->sent_method_calls; |
| 189 received += stat->received_signals; |
| 190 sent_blocking += stat->sent_blocking_method_calls; |
| 191 // If this is not the last stat, and if the next stat matches the current |
| 192 // stat, continue. |
| 193 if (next_iter != stats.end() && |
| 194 (*next_iter)->service == stat->service && |
| 195 (show < SHOW_INTERFACE || (*next_iter)->interface == stat->interface) && |
| 196 (show < SHOW_METHOD || (*next_iter)->method == stat->method)) |
| 197 continue; |
| 198 |
| 199 if (!sent && !received && !sent_blocking) |
| 200 continue; // No stats collected for this line, skip it and continue. |
| 201 |
| 202 // Add a line to the result and clear the counts. |
| 203 std::string line; |
| 204 if (show == SHOW_SERVICE) { |
| 205 line += stat->service; |
| 206 } else { |
| 207 // The interface usually includes the service so don't show both. |
| 208 line += stat->interface; |
| 209 if (show >= SHOW_METHOD) |
| 210 line += "." + stat->method; |
| 211 } |
| 212 line += StringPrintf(":"); |
| 213 if (sent_blocking) { |
| 214 line += StringPrintf(" Sent (BLOCKING):"); |
| 215 if (format == FORMAT_TOTALS) |
| 216 line += StringPrintf(" %d", sent_blocking); |
| 217 else if (format == FORMAT_PER_MINUTE) |
| 218 line += StringPrintf(" %d/min", sent_blocking / dminutes); |
| 219 else if (format == FORMAT_ALL) |
| 220 line += StringPrintf(" %d (%d/min)", |
| 221 sent_blocking, sent_blocking / dminutes); |
| 222 } |
| 223 if (sent) { |
| 224 line += StringPrintf(" Sent:"); |
| 225 if (format == FORMAT_TOTALS) |
| 226 line += StringPrintf(" %d", sent); |
| 227 else if (format == FORMAT_PER_MINUTE) |
| 228 line += StringPrintf(" %d/min", sent / dminutes); |
| 229 else if (format == FORMAT_ALL) |
| 230 line += StringPrintf(" %d (%d/min)", sent, sent / dminutes); |
| 231 } |
| 232 if (received) { |
| 233 line += StringPrintf(" Received:"); |
| 234 if (format == FORMAT_TOTALS) |
| 235 line += StringPrintf(" %d", received); |
| 236 else if (format == FORMAT_PER_MINUTE) |
| 237 line += StringPrintf(" %d/min", received / dminutes); |
| 238 else if (format == FORMAT_ALL) |
| 239 line += StringPrintf(" %d (%d/min)", received, received / dminutes); |
| 240 } |
| 241 result += line + "\n"; |
| 242 sent = 0; |
| 243 sent_blocking = 0; |
| 244 received = 0; |
| 245 } |
| 246 return result; |
| 247 } |
| 248 |
| 249 namespace testing { |
| 250 |
| 251 bool GetCalls(const std::string& service, |
| 252 const std::string& interface, |
| 253 const std::string& method, |
| 254 int* sent, |
| 255 int* received, |
| 256 int* blocking) { |
| 257 if (!g_dbus_statistics) |
| 258 return false; |
| 259 Stat* stat = g_dbus_statistics->GetStat(service, interface, method, false); |
| 260 if (!stat) |
| 261 return false; |
| 262 *sent = stat->sent_method_calls; |
| 263 *received = stat->received_signals; |
| 264 *blocking = stat->sent_blocking_method_calls; |
| 265 return true; |
| 266 } |
| 267 |
| 268 } // namespace testing |
| 269 |
| 270 } // namespace statistics |
| 271 } // namespace dbus |
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