170   void* stack = mmap(nullptr, stack_size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);  in TEST()  local
171   ASSERT_NE(MAP_FAILED, stack);  in TEST()
172   memset(stack, 0xff, stack_size);  in TEST()
176   ASSERT_EQ(0, pthread_attr_setstack(&attr, stack, stack_size));  in TEST()
185   ASSERT_EQ(0, munmap(stack, stack_size));  in TEST()
199   std::unique_ptr<char[]> stack(new (std::align_val_t(getpagesize())) char[stack_size]);  in TEST()  local
200   memset(stack.get(), '\xff', stack_size);  in TEST()
204   ASSERT_EQ(0, pthread_attr_setstack(&attr, stack.get(), stack_size));  in TEST()
736     void* stack = mmap(nullptr, stack_size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);  in TEST()  local
740     pthread_attr_setstack(&a, stack, stack_size);  in TEST()
745     ASSERT_EQ(0, munmap(stack, stack_size));  in TEST()