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      1 /*
      2  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include "webrtc/system_wrappers/source/trace_posix.h"
     12 
     13 #include <assert.h>
     14 #include <stdarg.h>
     15 #include <stdio.h>
     16 #include <string.h>
     17 #include <sys/time.h>
     18 #include <time.h>
     19 
     20 #if defined(_DEBUG)
     21 #define BUILDMODE "d"
     22 #elif defined(DEBUG)
     23 #define BUILDMODE "d"
     24 #elif defined(NDEBUG)
     25 #define BUILDMODE "r"
     26 #else
     27 #define BUILDMODE "?"
     28 #endif
     29 #define BUILDTIME __TIME__
     30 #define BUILDDATE __DATE__
     31 // example: "Oct 10 2002 12:05:30 r"
     32 #define BUILDINFO BUILDDATE " " BUILDTIME " " BUILDMODE
     33 
     34 namespace webrtc {
     35 
     36 TracePosix::TracePosix()
     37     : crit_sect_(*CriticalSectionWrapper::CreateCriticalSection()) {
     38   struct timeval system_time_high_res;
     39   gettimeofday(&system_time_high_res, 0);
     40   prev_api_tick_count_ = prev_tick_count_ = system_time_high_res.tv_sec;
     41 }
     42 
     43 TracePosix::~TracePosix() {
     44   delete &crit_sect_;
     45   StopThread();
     46 }
     47 
     48 int32_t TracePosix::AddTime(char* trace_message, const TraceLevel level) const {
     49   struct timeval system_time_high_res;
     50   if (gettimeofday(&system_time_high_res, 0) == -1) {
     51     return -1;
     52   }
     53   struct tm buffer;
     54   const struct tm* system_time =
     55     localtime_r(&system_time_high_res.tv_sec, &buffer);
     56 
     57   const uint32_t ms_time = system_time_high_res.tv_usec / 1000;
     58   uint32_t prev_tickCount = 0;
     59   {
     60     CriticalSectionScoped lock(&crit_sect_);
     61     if (level == kTraceApiCall) {
     62       prev_tickCount = prev_tick_count_;
     63       prev_tick_count_ = ms_time;
     64     } else {
     65       prev_tickCount = prev_api_tick_count_;
     66       prev_api_tick_count_ = ms_time;
     67     }
     68   }
     69 
     70   uint32_t dw_delta_time = ms_time - prev_tickCount;
     71   if (prev_tickCount == 0) {
     72     dw_delta_time = 0;
     73   }
     74   if (dw_delta_time > 0x0fffffff) {
     75     // Either wraparound or data race.
     76     dw_delta_time = 0;
     77   }
     78   if (dw_delta_time > 99999) {
     79     dw_delta_time = 99999;
     80   }
     81 
     82   sprintf(trace_message, "(%2u:%2u:%2u:%3u |%5lu) ", system_time->tm_hour,
     83           system_time->tm_min, system_time->tm_sec, ms_time,
     84           static_cast<unsigned long>(dw_delta_time));
     85   // Messages are 22 characters.
     86   return 22;
     87 }
     88 
     89 int32_t TracePosix::AddBuildInfo(char* trace_message) const {
     90   sprintf(trace_message, "Build info: %s", BUILDINFO);
     91   // Include NULL termination (hence + 1).
     92   return strlen(trace_message) + 1;
     93 }
     94 
     95 int32_t TracePosix::AddDateTimeInfo(char* trace_message) const {
     96   time_t t;
     97   time(&t);
     98   char buffer[26];  // man ctime says buffer should have room for >=26 bytes.
     99   sprintf(trace_message, "Local Date: %s", ctime_r(&t, buffer));
    100   int32_t len = static_cast<int32_t>(strlen(trace_message));
    101 
    102   if ('\n' == trace_message[len - 1]) {
    103     trace_message[len - 1] = '\0';
    104     --len;
    105   }
    106 
    107   // Messages is 12 characters.
    108   return len + 1;
    109 }
    110 
    111 }  // namespace webrtc
    112