@@ -16,6 +16,10 @@
#include <gtest/gtest.h>
#if !defined(OPENSSL_NO_THREADS)
#include <thread>
#endif
TEST(RefCountTest, Basic) {
CRYPTO_refcount_t count = 0;
@@ -38,3 +42,38 @@ TEST(RefCountTest, Basic) {
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(1u, count);
}
#if !defined(OPENSSL_NO_THREADS)
// This test is primarily intended to run under ThreadSanitizer.
TEST(RefCountTest, Threads) {
CRYPTO_refcount_t count = 0;
// Race two increments.
{
std::thread thread([&] { CRYPTO_refcount_inc(&count); });
CRYPTO_refcount_inc(&count);
thread.join();
EXPECT_EQ(2u, count);
}
// Race an increment with a decrement.
{
std::thread thread([&] { CRYPTO_refcount_inc(&count); });
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
thread.join();
EXPECT_EQ(2u, count);
}
// Race two decrements.
{
bool thread_saw_zero;
std::thread thread(
[&] { thread_saw_zero = CRYPTO_refcount_dec_and_test_zero(&count); });
bool saw_zero = CRYPTO_refcount_dec_and_test_zero(&count);
thread.join();
EXPECT_EQ(0u, count);
// Exactly one thread should see zero.
EXPECT_NE(saw_zero, thread_saw_zero);
}
}
#endif