compiler-rt/lib/tsan/benchmarks/func_entry_exit.cpp

   1 // Synthetic benchmark for __tsan_func_entry/exit (spends ~75% there).
   2
   3 void foo(bool x);
   4
   5 int main() {
   6   volatile int kRepeat1 = 1 << 30;
   7   const int kRepeat = kRepeat1;
   8   for (int i = 0; i < kRepeat; i++)
   9     foo(false);
  10 }
  11
  12 __attribute__((noinline)) void bar(volatile bool x) {
  13   if (x)
  14     foo(x);
  15 }
  16
  17 __attribute__((noinline)) void foo(bool x) {
  18   if (__builtin_expect(x, false))
  19     bar(x);
  20 }