123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
// RUN: %clang -fsyntax-only -verify -Wthread-safety -Wthread-safety-beta -fcxx-exceptions %s
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#define LOCKABLE __attribute__ ((lockable))
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#define SCOPED_LOCKABLE __attribute__ ((scoped_lockable))
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#define GUARDED_BY(x) __attribute__ ((guarded_by(x)))
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#define GUARDED_VAR __attribute__ ((guarded_var))
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#define PT_GUARDED_BY(x) __attribute__ ((pt_guarded_by(x)))
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#define PT_GUARDED_VAR __attribute__ ((pt_guarded_var))
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#define ACQUIRED_AFTER(...) __attribute__ ((acquired_after(__VA_ARGS__)))
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#define ACQUIRED_BEFORE(...) __attribute__ ((acquired_before(__VA_ARGS__)))
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#define EXCLUSIVE_LOCK_FUNCTION(...) __attribute__ ((exclusive_lock_function(__VA_ARGS__)))
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#define SHARED_LOCK_FUNCTION(...) __attribute__ ((shared_lock_function(__VA_ARGS__)))
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#define ASSERT_EXCLUSIVE_LOCK(...) __attribute__ ((assert_exclusive_lock(__VA_ARGS__)))
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#define ASSERT_SHARED_LOCK(...) __attribute__ ((assert_shared_lock(__VA_ARGS__)))
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#define EXCLUSIVE_TRYLOCK_FUNCTION(...) __attribute__ ((exclusive_trylock_function(__VA_ARGS__)))
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#define SHARED_TRYLOCK_FUNCTION(...) __attribute__ ((shared_trylock_function(__VA_ARGS__)))
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#define UNLOCK_FUNCTION(...) __attribute__ ((unlock_function(__VA_ARGS__)))
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#define LOCK_RETURNED(x) __attribute__ ((lock_returned(x)))
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#define LOCKS_EXCLUDED(...) __attribute__ ((locks_excluded(__VA_ARGS__)))
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#define EXCLUSIVE_LOCKS_REQUIRED(...) \
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__attribute__ ((exclusive_locks_required(__VA_ARGS__)))
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#define SHARED_LOCKS_REQUIRED(...) \
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__attribute__ ((shared_locks_required(__VA_ARGS__)))
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#define NO_THREAD_SAFETY_ANALYSIS __attribute__ ((no_thread_safety_analysis))
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// Define the mutex struct.
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// Simplified only for test purpose.
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struct LOCKABLE Mutex {};
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struct Foo {
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struct Mutex *mu_;
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};
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// Define mutex lock/unlock functions.
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void mutex_exclusive_lock(struct Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu) {
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}
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void mutex_shared_lock(struct Mutex *mu) SHARED_LOCK_FUNCTION(mu) {
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}
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void mutex_unlock(struct Mutex *mu) UNLOCK_FUNCTION(mu) {
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}
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// Define global variables.
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struct Mutex mu1;
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struct Mutex mu2 ACQUIRED_AFTER(mu1);
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struct Foo foo_ = {&mu1};
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int a_ GUARDED_BY(foo_.mu_);
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int *b_ PT_GUARDED_BY(foo_.mu_) = &a_;
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int c_ GUARDED_VAR;
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int *d_ PT_GUARDED_VAR = &c_;
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// Define test functions.
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int Foo_fun1(int i) SHARED_LOCKS_REQUIRED(mu2) EXCLUSIVE_LOCKS_REQUIRED(mu1) {
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return i;
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}
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int Foo_fun2(int i) EXCLUSIVE_LOCKS_REQUIRED(mu2) SHARED_LOCKS_REQUIRED(mu1) {
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return i;
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}
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int Foo_func3(int i) LOCKS_EXCLUDED(mu1, mu2) {
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return i;
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}
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static int Bar_fun1(int i) EXCLUSIVE_LOCKS_REQUIRED(mu1) {
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return i;
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}
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void set_value(int *a, int value) EXCLUSIVE_LOCKS_REQUIRED(foo_.mu_) {
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*a = value;
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}
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int get_value(int *p) SHARED_LOCKS_REQUIRED(foo_.mu_){
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return *p;
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}
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int main() {
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Foo_fun1(1); // expected-warning{{calling function 'Foo_fun1' requires shared lock on 'mu2'}} \
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expected-warning{{calling function 'Foo_fun1' requires exclusive lock on 'mu1'}}
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mutex_exclusive_lock(&mu1);
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mutex_shared_lock(&mu2);
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Foo_fun1(1);
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mutex_shared_lock(&mu1); // expected-warning{{locking 'mu1' that is already locked}}
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mutex_unlock(&mu1);
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mutex_unlock(&mu2);
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mutex_shared_lock(&mu1);
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mutex_exclusive_lock(&mu2);
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Foo_fun2(2);
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mutex_unlock(&mu2);
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mutex_unlock(&mu1);
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mutex_exclusive_lock(&mu1);
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Bar_fun1(3);
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mutex_unlock(&mu1);
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mutex_exclusive_lock(&mu1);
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Foo_func3(4); // expected-warning{{cannot call function 'Foo_func3' while mutex 'mu1' is locked}}
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mutex_unlock(&mu1);
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Foo_func3(5);
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set_value(&a_, 0); // expected-warning{{calling function 'setA' requires exclusive lock on 'foo_.mu_'}}
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get_value(b_); // expected-warning{{calling function 'getB' requires shared lock on 'foo_.mu_'}}
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mutex_exclusive_lock(foo_.mu_);
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set_value(&a_, 1);
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mutex_unlock(foo_.mu_);
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mutex_shared_lock(foo_.mu_);
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(void)(get_value(b_) == 1);
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mutex_unlock(foo_.mu_);
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c_ = 0; // expected-warning{{writing variable 'c_' requires locking any mutex exclusively}}
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(void)(*d_ == 0); // expected-warning{{reading the value pointed to by 'd_' requires locking any mutex}}
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mutex_exclusive_lock(foo_.mu_);
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c_ = 1;
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(void)(*d_ == 1);
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mutex_unlock(foo_.mu_);
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return 0;
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}
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