Log ticks when the prof flag is set. Avoid letting --prof

src/log.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 635 matching lines @@
           event_type,
           OS::TimeCurrentMillis(),
           parameter_string);
   DeleteArray(parameter_string);
 #endif
 }
 
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::TickEvent(TickSample* sample, bool overflow) {
-  if (logfile_ == NULL || !FLAG_log) return;
+  if (logfile_ == NULL || !FLAG_prof) return;
   ScopedLock sl(mutex_);
   fprintf(logfile_, "tick,0x%x,0x%x,%d", sample->pc, sample->sp,
           static_cast<int>(sample->state));
   if (overflow) fprintf(logfile_, ",overflow");
   fprintf(logfile_, "\n");
 }
 #endif
 
 
 bool Logger::Setup() {
 #ifdef ENABLE_LOGGING_AND_PROFILING
   // --log-all enables all the log flags.
   if (FLAG_log_all) {
     FLAG_log_api = true;
     FLAG_log_code = true;
     FLAG_log_gc = true;
     FLAG_log_suspect = true;
     FLAG_log_handles = true;
     FLAG_log_regexp = true;
   }
 
   // --prof implies --log-code.
   if (FLAG_prof) FLAG_log_code = true;
-  if (FLAG_log_code) FLAG_log = true;
 
   bool open_log_file = FLAG_log || FLAG_log_api || FLAG_log_code
       || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
       || FLAG_log_regexp;
 
   // If we're logging anything, we need to open the log file.
   if (open_log_file) {
     if (strcmp(FLAG_logfile, "-") == 0) {
       logfile_ = stdout;
     } else {
@@ skipping 107 matching lines @@
   if (FLAG_log_state_changes) {
     LOG(StringEvent("Leaving", StateToString(state_)));
     if (previous_) {
       LOG(StringEvent("To", StateToString(previous_->state_)));
     }
   }
 }
 #endif
 
 } }  // namespace v8::internal