vendor/clang/clang-r142614

1 files changed, 137 insertions, 0 deletions

diff --git a/test/Analysis/pthreadlock.c b/test/Analysis/pthreadlock.c
new file mode 100644
index 0000000000000..4735d20eaa5c2
--- /dev/null
+++ b/test/Analysis/pthreadlock.c
@@ -0,0 +1,137 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=experimental.unix.PthreadLock -verify %s
+
+// Tests performing normal locking patterns and wrong locking orders
+
+typedef struct {
+	void	*foo;
+} pthread_mutex_t;
+
+typedef pthread_mutex_t lck_mtx_t;
+
+extern int pthread_mutex_lock(pthread_mutex_t *);
+extern int pthread_mutex_unlock(pthread_mutex_t *);
+extern int pthread_mutex_trylock(pthread_mutex_t *);
+extern int lck_mtx_lock(lck_mtx_t *);
+extern int lck_mtx_unlock(lck_mtx_t *);
+extern int lck_mtx_try_lock(lck_mtx_t *);
+
+pthread_mutex_t mtx1, mtx2;
+lck_mtx_t lck1, lck2;
+
+void
+ok1(void)
+{
+	pthread_mutex_lock(&mtx1); // no-warning
+}
+
+void
+ok2(void)
+{
+	pthread_mutex_unlock(&mtx1); // no-warning
+}
+
+void
+ok3(void)
+{
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_unlock(&mtx1);	// no-warning
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_unlock(&mtx1);	// no-warning
+}
+
+void
+ok4(void)
+{
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_unlock(&mtx1);	// no-warning
+	pthread_mutex_lock(&mtx2);	// no-warning
+	pthread_mutex_unlock(&mtx2);	// no-warning
+}
+
+void
+ok5(void)
+{
+	if (pthread_mutex_trylock(&mtx1) == 0)	// no-warning
+		pthread_mutex_unlock(&mtx1);	// no-warning
+}
+
+void
+ok6(void)
+{
+	lck_mtx_lock(&lck1);		// no-warning
+}
+
+void
+ok7(void)
+{
+	if (lck_mtx_try_lock(&lck1) != 0)	// no-warning
+		lck_mtx_unlock(&lck1);		// no-warning
+}
+
+void
+bad1(void)
+{
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_lock(&mtx1);	// expected-warning{{This lock has already been acquired}}
+}
+
+void
+bad2(void)
+{
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_unlock(&mtx1);	// no-warning
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_lock(&mtx1);	// expected-warning{{This lock has already been acquired}}
+}
+
+void
+bad3(void)
+{
+	pthread_mutex_lock(&mtx1);	// no-warning
+	pthread_mutex_lock(&mtx2);	// no-warning
+	pthread_mutex_unlock(&mtx1);	// expected-warning{{This was not the most recently acquired lock}}
+	pthread_mutex_unlock(&mtx2);
+}
+
+void
+bad4(void)
+{
+	if (pthread_mutex_trylock(&mtx1)) // no-warning
+		return;
+	pthread_mutex_lock(&mtx2);	// no-warning
+	pthread_mutex_unlock(&mtx1);	// expected-warning{{This was not the most recently acquired lock}}
+}
+
+void
+bad5(void)
+{
+	lck_mtx_lock(&lck1);	// no-warning
+	lck_mtx_lock(&lck1);	// expected-warning{{This lock has already been acquired}}
+}
+
+void
+bad6(void)
+{
+	lck_mtx_lock(&lck1);	// no-warning
+	lck_mtx_unlock(&lck1);	// no-warning
+	lck_mtx_lock(&lck1);	// no-warning
+	lck_mtx_lock(&lck1);	// expected-warning{{This lock has already been acquired}}
+}
+
+void
+bad7(void)
+{
+	lck_mtx_lock(&lck1);	// no-warning
+	lck_mtx_lock(&lck2);	// no-warning
+	lck_mtx_unlock(&lck1);	// expected-warning{{This was not the most recently acquired lock}}
+	lck_mtx_unlock(&lck2);
+}
+
+void
+bad8(void)
+{
+	if (lck_mtx_try_lock(&lck1) == 0) // no-warning
+		return;
+	lck_mtx_lock(&lck2);		// no-warning
+	lck_mtx_unlock(&lck1);		// expected-warning{{This was not the most recently acquired lock}}
+}