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/* Copyright (c) 2015, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include "internal.h"
#include <chrono>
#include <vector>
#include <thread>
#include <gtest/gtest.h>
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include "test/test_util.h"
#if defined(OPENSSL_THREADS)
static unsigned g_once_init_called = 0;
static void once_init(void) {
g_once_init_called++;
// Sleep briefly so one |call_once_func| instance will call |CRYPTO_once|
// while the other is running this function.
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
static CRYPTO_once_t g_test_once = CRYPTO_ONCE_INIT;
TEST(ThreadTest, Once) {
ASSERT_EQ(0u, g_once_init_called)
<< "g_once_init_called was non-zero at start.";
auto call_once_func = [] { CRYPTO_once(&g_test_once, once_init); };
std::thread thread1(call_once_func), thread2(call_once_func);
thread1.join();
thread2.join();
CRYPTO_once(&g_test_once, once_init);
EXPECT_EQ(1u, g_once_init_called);
}
static CRYPTO_once_t once_init_value = CRYPTO_ONCE_INIT;
static CRYPTO_once_t once_bss;
static CRYPTO_MUTEX mutex_init_value = CRYPTO_MUTEX_INIT;
static CRYPTO_MUTEX mutex_bss;
static CRYPTO_EX_DATA_CLASS ex_data_class_value = CRYPTO_EX_DATA_CLASS_INIT;
static CRYPTO_EX_DATA_CLASS ex_data_class_bss;
TEST(ThreadTest, InitZeros) {
if (FIPS_mode()) {
// Our FIPS tooling currently requires that |CRYPTO_ONCE_INIT|,
// |CRYPTO_MUTEX_INIT| and |CRYPTO_EX_DATA_CLASS| are all zeros and so can
// be placed in the BSS section.
EXPECT_EQ(Bytes((uint8_t *)&once_bss, sizeof(once_bss)),
Bytes((uint8_t *)&once_init_value, sizeof(once_init_value)));
EXPECT_EQ(Bytes((uint8_t *)&mutex_bss, sizeof(mutex_bss)),
Bytes((uint8_t *)&mutex_init_value, sizeof(mutex_init_value)));
EXPECT_EQ(
Bytes((uint8_t *)&ex_data_class_bss, sizeof(ex_data_class_bss)),
Bytes((uint8_t *)&ex_data_class_value, sizeof(ex_data_class_value)));
}
}
static int g_test_thread_ok = 0;
static unsigned g_destructor_called_count = 0;
static void thread_local_destructor(void *arg) {
if (arg == NULL) {
return;
}
unsigned *count = reinterpret_cast<unsigned*>(arg);
(*count)++;
}
TEST(ThreadTest, ThreadLocal) {
ASSERT_EQ(nullptr, CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_TEST))
<< "Thread-local data was non-NULL at start.";
std::thread thread([] {
if (CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_TEST) != NULL ||
!CRYPTO_set_thread_local(OPENSSL_THREAD_LOCAL_TEST,
&g_destructor_called_count,
thread_local_destructor) ||
CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_TEST) !=
&g_destructor_called_count) {
return;
}
g_test_thread_ok = 1;
});
thread.join();
EXPECT_TRUE(g_test_thread_ok) << "Thread-local data didn't work in thread.";
EXPECT_EQ(1u, g_destructor_called_count);
// Create a no-op thread to test that the thread destructor function works
// even if thread-local storage wasn't used for a thread.
thread = std::thread([] {});
thread.join();
}
TEST(ThreadTest, RandState) {
// In FIPS mode, rand.c maintains a linked-list of thread-local data because
// we're required to clear it on process exit. This test exercises removing a
// value from that list.
uint8_t buf[1];
RAND_bytes(buf, sizeof(buf));
std::thread thread([] {
uint8_t buf2[1];
RAND_bytes(buf2, sizeof(buf2));
});
thread.join();
}
TEST(ThreadTest, PreSandboxInitThreads) {
constexpr size_t kNumThreads = 10;
// |CRYPTO_pre_sandbox_init| is safe to call across threads.
std::vector<std::thread> threads;
threads.reserve(kNumThreads);
for (size_t i = 0; i < kNumThreads; i++) {
threads.emplace_back(&CRYPTO_pre_sandbox_init);
}
for (auto &thread : threads) {
thread.join();
}
}
#endif // OPENSSL_THREADS
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