1 files changed, 20 insertions, 5 deletions
diff --git a/test/std/thread/thread.mutex/thread.mutex.requirements/thread.sharedtimedmutex.requirements/thread.sharedtimedmutex.class/lock_shared.pass.cpp b/test/std/thread/thread.mutex/thread.mutex.requirements/thread.sharedtimedmutex.requirements/thread.sharedtimedmutex.class/lock_shared.pass.cpp
index 8fc6299f1b8f..77a9107de923 100644
--- a/test/std/thread/thread.mutex/thread.mutex.requirements/thread.sharedtimedmutex.requirements/thread.sharedtimedmutex.class/lock_shared.pass.cpp
+++ b/test/std/thread/thread.mutex/thread.mutex.requirements/thread.sharedtimedmutex.requirements/thread.sharedtimedmutex.class/lock_shared.pass.cpp
@@ -22,6 +22,8 @@
 #include <cstdlib>
 #include <cassert>
 
+#include "test_macros.h"
+
 std::shared_timed_mutex m;
 
 typedef std::chrono::system_clock Clock;
@@ -30,14 +32,27 @@ typedef Clock::duration duration;
 typedef std::chrono::milliseconds ms;
 typedef std::chrono::nanoseconds ns;
 
+
+ms WaitTime = ms(250);
+
+// Thread sanitizer causes more overhead and will sometimes cause this test
+// to fail. To prevent this we give Thread sanitizer more time to complete the
+// test.
+#if !defined(TEST_HAS_SANITIZERS)
+ms Tolerance = ms(50);
+#else
+ms Tolerance = ms(50 * 5);
+#endif
+
+
 void f()
 {
     time_point t0 = Clock::now();
     m.lock_shared();
     time_point t1 = Clock::now();
     m.unlock_shared();
-    ns d = t1 - t0 - ms(250);
-    assert(d < ms(50));  // within 50ms
+    ns d = t1 - t0 - WaitTime;
+    assert(d < Tolerance);  // within tolerance
 }
 
 void g()
@@ -47,7 +62,7 @@ void g()
     time_point t1 = Clock::now();
     m.unlock_shared();
     ns d = t1 - t0;
-    assert(d < ms(50));  // within 50ms
+    assert(d < Tolerance);  // within tolerance
 }
 
 
@@ -57,7 +72,7 @@ int main()
     std::vector<std::thread> v;
     for (int i = 0; i < 5; ++i)
         v.push_back(std::thread(f));
-    std::this_thread::sleep_for(ms(250));
+    std::this_thread::sleep_for(WaitTime);
     m.unlock();
     for (auto& t : v)
         t.join();
@@ -65,7 +80,7 @@ int main()
     for (auto& t : v)
         t = std::thread(g);
     std::thread q(f);
-    std::this_thread::sleep_for(ms(250));
+    std::this_thread::sleep_for(WaitTime);
     m.unlock_shared();
     for (auto& t : v)
         t.join();