fuchsia_lock.c
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// RUN: %clang_analyze_cc1 -analyzer-checker=alpha.fuchsia.Lock -verify %s
typedef int spin_lock_t;
typedef int zx_status_t;
typedef int zx_time_t;
void spin_lock(spin_lock_t *lock);
int spin_trylock(spin_lock_t *lock);
void spin_unlock(spin_lock_t *lock);
void spin_lock_init(spin_lock_t *lock);
void spin_lock_save(spin_lock_t *lock, void *statep,
int flags);
void spin_unlock_restore(spin_lock_t *lock, void *old_state,
int flags);
spin_lock_t mtx1;
spin_lock_t mtx2;
void bad1(void)
{
spin_lock(&mtx1); // no-warning
spin_lock(&mtx1); // expected-warning{{This lock has already been acquired}}
}
void bad2(void) {
spin_lock(&mtx1);
spin_unlock(&mtx1);
spin_unlock(&mtx1); // expected-warning {{This lock has already been unlocked}}
}
void bad3() {
spin_lock_init(&mtx1);
if (spin_trylock(&mtx1) != 0)
spin_unlock(&mtx1); // expected-warning {{This lock has already been unlocked}}
}
void bad4(void) {
spin_lock(&mtx1);
spin_lock(&mtx2);
spin_unlock(&mtx1); // expected-warning {{This was not the most recently acquired lock. Possible lock order reversal}}
spin_unlock(&mtx2);
}
void good() {
spin_lock_t mtx;
spin_lock_init(&mtx);
spin_lock_save(&mtx, 0, 0);
spin_unlock_restore(&mtx, 0, 0);
}
void good2() {
spin_lock_t mtx;
spin_lock_init(&mtx);
if (spin_trylock(&mtx) == 0)
spin_unlock(&mtx);
}
typedef int sync_mutex_t;
void sync_mutex_lock(sync_mutex_t* mutex);
void sync_mutex_lock_with_waiter(sync_mutex_t* mutex);
zx_status_t sync_mutex_timedlock(sync_mutex_t* mutex, zx_time_t deadline);
zx_status_t sync_mutex_trylock(sync_mutex_t* mutex);
void sync_mutex_unlock(sync_mutex_t* mutex);
sync_mutex_t smtx1;
sync_mutex_t smtx2;
void bad11(void)
{
sync_mutex_lock(&smtx1); // no-warning
sync_mutex_lock(&smtx1); // expected-warning{{This lock has already been acquired}}
}
void bad12(void) {
sync_mutex_lock_with_waiter(&smtx1);
sync_mutex_unlock(&smtx1);
sync_mutex_unlock(&smtx1); // expected-warning {{This lock has already been unlocked}}
}
void bad13() {
sync_mutex_unlock(&smtx1);
if (sync_mutex_trylock(&smtx1) != 0)
sync_mutex_unlock(&smtx1); // expected-warning {{This lock has already been unlocked}}
}
void bad14(void) {
sync_mutex_lock(&smtx1);
sync_mutex_lock(&smtx2);
sync_mutex_unlock(&smtx1); // expected-warning {{This was not the most recently acquired lock. Possible lock order reversal}}
sync_mutex_unlock(&smtx2);
}
void good11() {
sync_mutex_t mtx;
if (sync_mutex_trylock(&mtx) == 0)
sync_mutex_unlock(&mtx);
}
void good12() {
sync_mutex_t mtx;
if (sync_mutex_timedlock(&mtx, 0) == 0)
sync_mutex_unlock(&mtx);
}