[Fuchsia] Enable CPU profiling for the standalone VM

runtime/bin/thread_fuchsia.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(HOST_OS_FUCHSIA)
 
 #include "bin/thread.h"
 #include "bin/thread_fuchsia.h"
 
@@ skipping 272 matching lines @@
 Monitor::WaitResult Monitor::Wait(int64_t millis) {
   return WaitMicros(millis * kMicrosecondsPerMillisecond);
 }
 
 
 Monitor::WaitResult Monitor::WaitMicros(int64_t micros) {
   // TODO(iposva): Do we need to track lock owners?
   Monitor::WaitResult retval = kNotified;
   if (micros == kNoTimeout) {
     // Wait forever.
-    int result = pthread_cond_wait(data_.cond(), data_.mutex());
+    int result;
+    do {
+      result = pthread_cond_wait(data_.cond(), data_.mutex());
+      // TODO(MG-795): Disallow ETIMEDOUT when pthread_cond_wait() can no longer
+      // return it.
+    } while (result == ETIMEDOUT);
     VALIDATE_PTHREAD_RESULT(result);
   } else {
     struct timespec ts;
     ComputeTimeSpecMicros(&ts, micros);
     int result = pthread_cond_timedwait(data_.cond(), data_.mutex(), &ts);
     ASSERT((result == 0) || (result == ETIMEDOUT));
     if (result == ETIMEDOUT) {
       retval = kTimedOut;
     }
   }
@@ skipping 11 matching lines @@
 void Monitor::NotifyAll() {
   // TODO(iposva): Do we need to track lock owners?
   int result = pthread_cond_broadcast(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_FUCHSIA)