Fix data races flagged by tsan in ProfilerTest

Summary: Fixes a few data races flagged by tsan.

Differential Revision: D54083227

Author: Bikramjeet Vig

velox/common/process/Profiler.cpp

@@ -54,15 +54,15 @@ DEFINE_string(profiler_perf_flags, "", "Extra flags for Linux perf");
 
 namespace facebook::velox::process {
 
-bool Profiler::profileStarted_;
+tsan_atomic<bool> Profiler::profileStarted_;
 std::thread Profiler::profileThread_;
 std::mutex Profiler::profileMutex_;
 std::shared_ptr<velox::filesystems::FileSystem> Profiler::fileSystem_;
-bool Profiler::isSleeping_;
+tsan_atomic<bool> Profiler::isSleeping_;
 std::string Profiler::resultPath_;
-bool Profiler::shouldStop_;
+tsan_atomic<bool> Profiler::shouldStop_;
 folly::Promise<bool> Profiler::sleepPromise_;
-bool Profiler::shouldSaveResult_;
+tsan_atomic<bool> Profiler::shouldSaveResult_;
 int64_t Profiler::sampleStartTime_;
 int64_t Profiler::cpuAtSampleStart_;
 int64_t Profiler::cpuAtLastCheck_;

velox/common/process/Profiler.h

@@ -46,20 +46,20 @@ class Profiler {
   static void stopSample(std::thread thread);
   static void threadFunction();
 
-  static bool profileStarted_;
+  static tsan_atomic<bool> profileStarted_;
   static std::thread profileThread_;
   static std::mutex profileMutex_;
   static std::shared_ptr<velox::filesystems::FileSystem> fileSystem_;
-  static bool isSleeping_;
-  static bool shouldStop_;
+  static tsan_atomic<bool> isSleeping_;
+  static tsan_atomic<bool> shouldStop_;
   static folly::Promise<bool> sleepPromise_;
 
   // Directory where results are deposited. Results have unique names within
   // this.
   static std::string resultPath_;
 
   // indicates if the results of the the profile should be saved at stop.
-  static bool shouldSaveResult_;
+  static tsan_atomic<bool> shouldSaveResult_;
 
   // Time of starting the profile. Seconds from epoch.
   static int64_t sampleStartTime_;

velox/common/process/tests/ProfilerTest.cpp

@@ -56,7 +56,6 @@ TEST(ProfilerTest, basic) {
   return;
 #endif
   filesystems::registerLocalFileSystem();
-  Profiler::start("/tmp/profilertest");
   // We have seconds of busy and idle activity. We set the profiler to
   // check every second and to trigger after 1s at 200%. A burst of
   // under 2s is not recorded and a new file is started after every 4s