Use pthread_kill on solaris.

src/platform-solaris.cc

 // Copyright 2006-2009 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 655 matching lines @@
       } else {
         if (sampler_->IsProfiling()) SendProfilingSignal();
         if (RuntimeProfiler::IsEnabled()) RuntimeProfiler::NotifyTick();
         Sleep(FULL_INTERVAL);
       }
     }
   }
 
   void SendProfilingSignal() {
     if (!signal_handler_installed_) return;
-    // There doesn't seem to be a robust way to deliver a signal to a
-    // particular thread that may have terminated already. We send the
-    // signal to the whole process hoping the right thread will get
-    // it.
-    kill(vm_tgid_, SIGPROF);
+    pthread_kill(vm_tid_, SIGPROF);
   }
 
   void Sleep(SleepInterval full_or_half) {
     // Convert ms to us and subtract 100 us to compensate delays
     // occuring during signal delivery.
     useconds_t interval = sampler_->interval_ * 1000 - 100;
     if (full_or_half == HALF_INTERVAL) interval /= 2;
     int result = usleep(interval);
 #ifdef DEBUG
     if (result != 0 && errno != EINTR) {
@@ skipping 85 matching lines @@
     data_->signal_handler_installed_ = false;
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal