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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 <gtest/gtest.h>
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include "test/test_util.h"
#if !defined(OPENSSL_NO_THREADS)
#if defined(OPENSSL_WINDOWS)
OPENSSL_MSVC_PRAGMA(warning(push, 3))
#include <windows.h>
OPENSSL_MSVC_PRAGMA(warning(pop))
typedef HANDLE thread_t;
static DWORD WINAPI thread_run(LPVOID arg) {
void (*thread_func)(void);
/* VC really doesn't like casting between data and function pointers. */
OPENSSL_memcpy(&thread_func, &arg, sizeof(thread_func));
thread_func();
return 0;
}
static int run_thread(thread_t *out_thread, void (*thread_func)(void)) {
void *arg;
/* VC really doesn't like casting between data and function pointers. */
OPENSSL_memcpy(&arg, &thread_func, sizeof(arg));
*out_thread = CreateThread(NULL /* security attributes */,
0 /* default stack size */, thread_run, arg,
0 /* run immediately */, NULL /* ignore id */);
return *out_thread != NULL;
}
static int wait_for_thread(thread_t thread) {
return WaitForSingleObject(thread, INFINITE) == 0;
}
#else
#include <pthread.h>
#include <string.h>
#include <time.h>
typedef pthread_t thread_t;
static void *thread_run(void *arg) {
void (*thread_func)(void) = reinterpret_cast<void (*)(void)>(arg);
thread_func();
return NULL;
}
static int run_thread(thread_t *out_thread, void (*thread_func)(void)) {
return pthread_create(out_thread, NULL /* default attributes */, thread_run,
reinterpret_cast<void *>(thread_func)) == 0;
}
static int wait_for_thread(thread_t thread) {
return pthread_join(thread, NULL) == 0;
}
#endif /* OPENSSL_WINDOWS */
static unsigned g_once_init_called = 0;
static void once_init(void) {
g_once_init_called++;
/* Sleep briefly so one |call_once_thread| instance will call |CRYPTO_once|
* while the other is running this function. */
#if defined(OPENSSL_WINDOWS)
Sleep(1 /* milliseconds */);
#else
struct timespec req;
OPENSSL_memset(&req, 0, sizeof(req));
req.tv_nsec = 1000000;
nanosleep(&req, NULL);
#endif
}
static CRYPTO_once_t g_test_once = CRYPTO_ONCE_INIT;
static void call_once_thread(void) {
CRYPTO_once(&g_test_once, once_init);
}
static CRYPTO_once_t once_init_value = CRYPTO_ONCE_INIT;
static CRYPTO_once_t once_bss;
static struct CRYPTO_STATIC_MUTEX mutex_init_value = CRYPTO_STATIC_MUTEX_INIT;
static struct CRYPTO_STATIC_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, Once) {
ASSERT_EQ(0u, g_once_init_called)
<< "g_once_init_called was non-zero at start.";
thread_t thread1, thread2;
ASSERT_TRUE(run_thread(&thread1, call_once_thread));
ASSERT_TRUE(run_thread(&thread2, call_once_thread));
ASSERT_TRUE(wait_for_thread(thread1));
ASSERT_TRUE(wait_for_thread(thread2));
CRYPTO_once(&g_test_once, once_init);
EXPECT_EQ(1u, g_once_init_called);
}
TEST(ThreadTest, InitZeros) {
if (FIPS_mode()) {
/* Our FIPS tooling currently requires that |CRYPTO_ONCE_INIT|,
* |CRYPTO_STATIC_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.";
thread_t thread;
ASSERT_TRUE(run_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;
}));
ASSERT_TRUE(wait_for_thread(thread));
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 test that the thread destructor function
// works even if thread-local storage wasn't used for a thread.
ASSERT_TRUE(run_thread(&thread, []() {}));
ASSERT_TRUE(wait_for_thread(thread));
}
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));
thread_t thread;
ASSERT_TRUE(run_thread(&thread, []() {
uint8_t buf2[1];
RAND_bytes(buf2, sizeof(buf2));
}));
ASSERT_TRUE(wait_for_thread(thread));
}
#endif /* !OPENSSL_NO_THREADS */
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