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llvm-project/clang/test/SemaCXX/warn-thread-safety-analysis.cpp
Ed Schouten ca98874943 Allow a scoped lockable object to acquire/release multiple locks. 
Scoped lockable objects (mutex guards) are implemented as if it is a
lock itself that is acquired upon construction and unlocked upon
destruction. As it if course needs to be used to actually lock down
something else (a mutex), it keeps track of this knowledge through its
underlying mutex field in its FactEntry.

The problem with this approach is that this only allows us to lock down
a single mutex, so extend the code to use a vector of underlying
mutexes. This, however, makes the code a bit more complex than
necessary, so subclass FactEntry into LockableFactEntry and
ScopedLockableFactEntry and move all the logic that differs between
regular locks and scoped lockables into member functions.

llvm-svn: 217016
2014-09-03 06:00:11 +00:00

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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -Wthread-safety -Wthread-safety-beta -Wno-thread-safety-negative -fcxx-exceptions %s
// FIXME: should also run %clang_cc1 -fsyntax-only -verify -Wthread-safety -std=c++11 -Wc++98-compat %s
// FIXME: should also run %clang_cc1 -fsyntax-only -verify -Wthread-safety %s
#define LOCKABLE __attribute__ ((lockable))
#define SCOPED_LOCKABLE __attribute__ ((scoped_lockable))
#define GUARDED_BY(x) __attribute__ ((guarded_by(x)))
#define GUARDED_VAR __attribute__ ((guarded_var))
#define PT_GUARDED_BY(x) __attribute__ ((pt_guarded_by(x)))
#define PT_GUARDED_VAR __attribute__ ((pt_guarded_var))
#define ACQUIRED_AFTER(...) __attribute__ ((acquired_after(__VA_ARGS__)))
#define ACQUIRED_BEFORE(...) __attribute__ ((acquired_before(__VA_ARGS__)))
#define EXCLUSIVE_LOCK_FUNCTION(...) __attribute__ ((exclusive_lock_function(__VA_ARGS__)))
#define SHARED_LOCK_FUNCTION(...) __attribute__ ((shared_lock_function(__VA_ARGS__)))
#define ASSERT_EXCLUSIVE_LOCK(...) __attribute__ ((assert_exclusive_lock(__VA_ARGS__)))
#define ASSERT_SHARED_LOCK(...) __attribute__ ((assert_shared_lock(__VA_ARGS__)))
#define EXCLUSIVE_TRYLOCK_FUNCTION(...) __attribute__ ((exclusive_trylock_function(__VA_ARGS__)))
#define SHARED_TRYLOCK_FUNCTION(...) __attribute__ ((shared_trylock_function(__VA_ARGS__)))
#define UNLOCK_FUNCTION(...) __attribute__ ((unlock_function(__VA_ARGS__)))
#define LOCK_RETURNED(x) __attribute__ ((lock_returned(x)))
#define LOCKS_EXCLUDED(...) __attribute__ ((locks_excluded(__VA_ARGS__)))
#define EXCLUSIVE_LOCKS_REQUIRED(...) \
__attribute__ ((exclusive_locks_required(__VA_ARGS__)))
#define SHARED_LOCKS_REQUIRED(...) \
__attribute__ ((shared_locks_required(__VA_ARGS__)))
#define NO_THREAD_SAFETY_ANALYSIS __attribute__ ((no_thread_safety_analysis))
class __attribute__((lockable)) Mutex {
public:
void Lock() __attribute__((exclusive_lock_function));
void ReaderLock() __attribute__((shared_lock_function));
void Unlock() __attribute__((unlock_function));
bool TryLock() __attribute__((exclusive_trylock_function(true)));
bool ReaderTryLock() __attribute__((shared_trylock_function(true)));
void LockWhen(const int &cond) __attribute__((exclusive_lock_function));
// for negative capabilities
const Mutex& operator!() const { return *this; }
void AssertHeld() ASSERT_EXCLUSIVE_LOCK();
void AssertReaderHeld() ASSERT_SHARED_LOCK();
};
class __attribute__((scoped_lockable)) MutexLock {
public:
MutexLock(Mutex *mu) __attribute__((exclusive_lock_function(mu)));
~MutexLock() __attribute__((unlock_function));
};
class __attribute__((scoped_lockable)) ReaderMutexLock {
public:
ReaderMutexLock(Mutex *mu) __attribute__((exclusive_lock_function(mu)));
~ReaderMutexLock() __attribute__((unlock_function));
};
class SCOPED_LOCKABLE ReleasableMutexLock {
public:
ReleasableMutexLock(Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu);
~ReleasableMutexLock() UNLOCK_FUNCTION();
void Release() UNLOCK_FUNCTION();
};
class __attribute__((scoped_lockable)) DoubleMutexLock {
public:
DoubleMutexLock(Mutex *mu1, Mutex *mu2)
__attribute__((exclusive_lock_function(mu1, mu2)));
~DoubleMutexLock() __attribute__((unlock_function));
};
// The universal lock, written "*", allows checking to be selectively turned
// off for a particular piece of code.
void beginNoWarnOnReads() SHARED_LOCK_FUNCTION("*");
void endNoWarnOnReads() UNLOCK_FUNCTION("*");
void beginNoWarnOnWrites() EXCLUSIVE_LOCK_FUNCTION("*");
void endNoWarnOnWrites() UNLOCK_FUNCTION("*");
// For testing handling of smart pointers.
template<class T>
class SmartPtr {
public:
SmartPtr(T* p) : ptr_(p) { }
SmartPtr(const SmartPtr<T>& p) : ptr_(p.ptr_) { }
~SmartPtr();
T* get() const { return ptr_; }
T* operator->() const { return ptr_; }
T& operator*() const { return *ptr_; }
T& operator[](int i) const { return ptr_[i]; }
private:
T* ptr_;
};
// For testing destructor calls and cleanup.
class MyString {
public:
MyString(const char* s);
~MyString();
};
// For testing operator overloading
template <class K, class T>
class MyMap {
public:
T& operator[](const K& k);
};
// For testing handling of containers.
template <class T>
class MyContainer {
public:
MyContainer();
typedef T* iterator;
typedef const T* const_iterator;
T* begin();
T* end();
const T* cbegin();
const T* cend();
T& operator[](int i);
const T& operator[](int i) const;
private:
T* ptr_;
};
Mutex sls_mu;
Mutex sls_mu2 __attribute__((acquired_after(sls_mu)));
int sls_guard_var __attribute__((guarded_var)) = 0;
int sls_guardby_var __attribute__((guarded_by(sls_mu))) = 0;
bool getBool();
class MutexWrapper {
public:
Mutex mu;
int x __attribute__((guarded_by(mu)));
void MyLock() __attribute__((exclusive_lock_function(mu)));
};
MutexWrapper sls_mw;
void sls_fun_0() {
sls_mw.mu.Lock();
sls_mw.x = 5;
sls_mw.mu.Unlock();
}
void sls_fun_2() {
sls_mu.Lock();
int x = sls_guard_var;
sls_mu.Unlock();
}
void sls_fun_3() {
sls_mu.Lock();
sls_guard_var = 2;
sls_mu.Unlock();
}
void sls_fun_4() {
sls_mu2.Lock();
sls_guard_var = 2;
sls_mu2.Unlock();
}
void sls_fun_5() {
sls_mu.Lock();
int x = sls_guardby_var;
sls_mu.Unlock();
}
void sls_fun_6() {
sls_mu.Lock();
sls_guardby_var = 2;
sls_mu.Unlock();
}
void sls_fun_7() {
sls_mu.Lock();
sls_mu2.Lock();
sls_mu2.Unlock();
sls_mu.Unlock();
}
void sls_fun_8() {
sls_mu.Lock();
if (getBool())
sls_mu.Unlock();
else
sls_mu.Unlock();
}
void sls_fun_9() {
if (getBool())
sls_mu.Lock();
else
sls_mu.Lock();
sls_mu.Unlock();
}
void sls_fun_good_6() {
if (getBool()) {
sls_mu.Lock();
} else {
if (getBool()) {
getBool(); // EMPTY
} else {
getBool(); // EMPTY
}
sls_mu.Lock();
}
sls_mu.Unlock();
}
void sls_fun_good_7() {
sls_mu.Lock();
while (getBool()) {
sls_mu.Unlock();
if (getBool()) {
if (getBool()) {
sls_mu.Lock();
continue;
}
}
sls_mu.Lock();
}
sls_mu.Unlock();
}
void sls_fun_good_8() {
sls_mw.MyLock();
sls_mw.mu.Unlock();
}
void sls_fun_bad_1() {
sls_mu.Unlock(); // \
// expected-warning{{releasing mutex 'sls_mu' that was not held}}
}
void sls_fun_bad_2() {
sls_mu.Lock();
sls_mu.Lock(); // \
// expected-warning{{acquiring mutex 'sls_mu' that is already held}}
sls_mu.Unlock();
}
void sls_fun_bad_3() {
sls_mu.Lock(); // expected-note {{mutex acquired here}}
} // expected-warning{{mutex 'sls_mu' is still held at the end of function}}
void sls_fun_bad_4() {
if (getBool())
sls_mu.Lock(); // expected-note{{mutex acquired here}}
else
sls_mu2.Lock(); // expected-note{{mutex acquired here}}
} // expected-warning{{mutex 'sls_mu' is not held on every path through here}} \
// expected-warning{{mutex 'sls_mu2' is not held on every path through here}}
void sls_fun_bad_5() {
sls_mu.Lock(); // expected-note {{mutex acquired here}}
if (getBool())
sls_mu.Unlock();
} // expected-warning{{mutex 'sls_mu' is not held on every path through here}}
void sls_fun_bad_6() {
if (getBool()) {
sls_mu.Lock(); // expected-note {{mutex acquired here}}
} else {
if (getBool()) {
getBool(); // EMPTY
} else {
getBool(); // EMPTY
}
}
sls_mu.Unlock(); // \
expected-warning{{mutex 'sls_mu' is not held on every path through here}}\
expected-warning{{releasing mutex 'sls_mu' that was not held}}
}
void sls_fun_bad_7() {
sls_mu.Lock();
while (getBool()) {
sls_mu.Unlock();
if (getBool()) {
if (getBool()) {
continue; // \
expected-warning{{expecting mutex 'sls_mu' to be held at start of each loop}}
}
}
sls_mu.Lock(); // expected-note {{mutex acquired here}}
}
sls_mu.Unlock();
}
void sls_fun_bad_8() {
sls_mu.Lock(); // expected-note{{mutex acquired here}}
do {
sls_mu.Unlock(); // expected-warning{{expecting mutex 'sls_mu' to be held at start of each loop}}
} while (getBool());
}
void sls_fun_bad_9() {
do {
sls_mu.Lock(); // \
// expected-warning{{expecting mutex 'sls_mu' to be held at start of each loop}} \
// expected-note{{mutex acquired here}}
} while (getBool());
sls_mu.Unlock();
}
void sls_fun_bad_10() {
sls_mu.Lock(); // expected-note 2{{mutex acquired here}}
while(getBool()) { // expected-warning{{expecting mutex 'sls_mu' to be held at start of each loop}}
sls_mu.Unlock();
}
} // expected-warning{{mutex 'sls_mu' is still held at the end of function}}
void sls_fun_bad_11() {
while (getBool()) { // \
expected-warning{{expecting mutex 'sls_mu' to be held at start of each loop}}
sls_mu.Lock(); // expected-note {{mutex acquired here}}
}
sls_mu.Unlock(); // \
// expected-warning{{releasing mutex 'sls_mu' that was not held}}
}
void sls_fun_bad_12() {
sls_mu.Lock(); // expected-note {{mutex acquired here}}
while (getBool()) {
sls_mu.Unlock();
if (getBool()) {
if (getBool()) {
break; // expected-warning{{mutex 'sls_mu' is not held on every path through here}}
}
}
sls_mu.Lock();
}
sls_mu.Unlock();
}
//-----------------------------------------//
// Handling lock expressions in attribute args
// -------------------------------------------//
Mutex aa_mu;
class GlobalLocker {
public:
void globalLock() __attribute__((exclusive_lock_function(aa_mu)));
void globalUnlock() __attribute__((unlock_function(aa_mu)));
};
GlobalLocker glock;
void aa_fun_1() {
glock.globalLock();
glock.globalUnlock();
}
void aa_fun_bad_1() {
glock.globalUnlock(); // \
// expected-warning{{releasing mutex 'aa_mu' that was not held}}
}
void aa_fun_bad_2() {
glock.globalLock();
glock.globalLock(); // \
// expected-warning{{acquiring mutex 'aa_mu' that is already held}}
glock.globalUnlock();
}
void aa_fun_bad_3() {
glock.globalLock(); // expected-note{{mutex acquired here}}
} // expected-warning{{mutex 'aa_mu' is still held at the end of function}}
//--------------------------------------------------//
// Regression tests for unusual method names
//--------------------------------------------------//
Mutex wmu;
// Test diagnostics for other method names.
class WeirdMethods {
// FIXME: can't currently check inside constructors and destructors.
WeirdMethods() {
wmu.Lock(); // EXPECTED-NOTE {{mutex acquired here}}
} // EXPECTED-WARNING {{mutex 'wmu' is still held at the end of function}}
~WeirdMethods() {
wmu.Lock(); // EXPECTED-NOTE {{mutex acquired here}}
} // EXPECTED-WARNING {{mutex 'wmu' is still held at the end of function}}
void operator++() {
wmu.Lock(); // expected-note {{mutex acquired here}}
} // expected-warning {{mutex 'wmu' is still held at the end of function}}
operator int*() {
wmu.Lock(); // expected-note {{mutex acquired here}}
return 0;
} // expected-warning {{mutex 'wmu' is still held at the end of function}}
};
//-----------------------------------------------//
// Errors for guarded by or guarded var variables
// ----------------------------------------------//
int *pgb_gvar __attribute__((pt_guarded_var));
int *pgb_var __attribute__((pt_guarded_by(sls_mu)));
class PGBFoo {
public:
int x;
int *pgb_field __attribute__((guarded_by(sls_mu2)))
__attribute__((pt_guarded_by(sls_mu)));
void testFoo() {
pgb_field = &x; // \
// expected-warning {{writing variable 'pgb_field' requires holding mutex 'sls_mu2' exclusively}}
*pgb_field = x; // expected-warning {{reading variable 'pgb_field' requires holding mutex 'sls_mu2'}} \
// expected-warning {{writing the value pointed to by 'pgb_field' requires holding mutex 'sls_mu' exclusively}}
x = *pgb_field; // expected-warning {{reading variable 'pgb_field' requires holding mutex 'sls_mu2'}} \
// expected-warning {{reading the value pointed to by 'pgb_field' requires holding mutex 'sls_mu'}}
(*pgb_field)++; // expected-warning {{reading variable 'pgb_field' requires holding mutex 'sls_mu2'}} \
// expected-warning {{writing the value pointed to by 'pgb_field' requires holding mutex 'sls_mu' exclusively}}
}
};
class GBFoo {
public:
int gb_field __attribute__((guarded_by(sls_mu)));
void testFoo() {
gb_field = 0; // \
// expected-warning {{writing variable 'gb_field' requires holding mutex 'sls_mu' exclusively}}
}
void testNoAnal() __attribute__((no_thread_safety_analysis)) {
gb_field = 0;
}
};
GBFoo GlobalGBFoo __attribute__((guarded_by(sls_mu)));
void gb_fun_0() {
sls_mu.Lock();
int x = *pgb_var;
sls_mu.Unlock();
}
void gb_fun_1() {
sls_mu.Lock();
*pgb_var = 2;
sls_mu.Unlock();
}
void gb_fun_2() {
int x;
pgb_var = &x;
}
void gb_fun_3() {
int *x = pgb_var;
}
void gb_bad_0() {
sls_guard_var = 1; // \
// expected-warning{{writing variable 'sls_guard_var' requires holding any mutex exclusively}}
}
void gb_bad_1() {
int x = sls_guard_var; // \
// expected-warning{{reading variable 'sls_guard_var' requires holding any mutex}}
}
void gb_bad_2() {
sls_guardby_var = 1; // \
// expected-warning {{writing variable 'sls_guardby_var' requires holding mutex 'sls_mu' exclusively}}
}
void gb_bad_3() {
int x = sls_guardby_var; // \
// expected-warning {{reading variable 'sls_guardby_var' requires holding mutex 'sls_mu'}}
}
void gb_bad_4() {
*pgb_gvar = 1; // \
// expected-warning {{writing the value pointed to by 'pgb_gvar' requires holding any mutex exclusively}}
}
void gb_bad_5() {
int x = *pgb_gvar; // \
// expected-warning {{reading the value pointed to by 'pgb_gvar' requires holding any mutex}}
}
void gb_bad_6() {
*pgb_var = 1; // \
// expected-warning {{writing the value pointed to by 'pgb_var' requires holding mutex 'sls_mu' exclusively}}
}
void gb_bad_7() {
int x = *pgb_var; // \
// expected-warning {{reading the value pointed to by 'pgb_var' requires holding mutex 'sls_mu'}}
}
void gb_bad_8() {
GBFoo G;
G.gb_field = 0; // \
// expected-warning {{writing variable 'gb_field' requires holding mutex 'sls_mu'}}
}
void gb_bad_9() {
sls_guard_var++; // \
// expected-warning{{writing variable 'sls_guard_var' requires holding any mutex exclusively}}
sls_guard_var--; // \
// expected-warning{{writing variable 'sls_guard_var' requires holding any mutex exclusively}}
++sls_guard_var; // \
// expected-warning{{writing variable 'sls_guard_var' requires holding any mutex exclusively}}
--sls_guard_var;// \
// expected-warning{{writing variable 'sls_guard_var' requires holding any mutex exclusively}}
}
//-----------------------------------------------//
// Warnings on variables with late parsed attributes
// ----------------------------------------------//
class LateFoo {
public:
int a __attribute__((guarded_by(mu)));
int b;
void foo() __attribute__((exclusive_locks_required(mu))) { }
void test() {
a = 0; // \
// expected-warning{{writing variable 'a' requires holding mutex 'mu' exclusively}}
b = a; // \
// expected-warning {{reading variable 'a' requires holding mutex 'mu'}}
c = 0; // \
// expected-warning {{writing variable 'c' requires holding mutex 'mu' exclusively}}
}
int c __attribute__((guarded_by(mu)));
Mutex mu;
};
class LateBar {
public:
int a_ __attribute__((guarded_by(mu1_)));
int b_;
int *q __attribute__((pt_guarded_by(mu)));
Mutex mu1_;
Mutex mu;
LateFoo Foo;
LateFoo Foo2;
LateFoo *FooPointer;
};
LateBar b1, *b3;
void late_0() {
LateFoo FooA;
LateFoo FooB;
FooA.mu.Lock();
FooA.a = 5;
FooA.mu.Unlock();
}
void late_1() {
LateBar BarA;
BarA.FooPointer->mu.Lock();
BarA.FooPointer->a = 2;
BarA.FooPointer->mu.Unlock();
}
void late_bad_0() {
LateFoo fooA;
LateFoo fooB;
fooA.mu.Lock();
fooB.a = 5; // \
// expected-warning{{writing variable 'a' requires holding mutex 'fooB.mu' exclusively}} \
// expected-note{{found near match 'fooA.mu'}}
fooA.mu.Unlock();
}
void late_bad_1() {
Mutex mu;
mu.Lock();
b1.mu1_.Lock();
int res = b1.a_ + b3->b_;
b3->b_ = *b1.q; // \
// expected-warning{{reading the value pointed to by 'q' requires holding mutex 'b1.mu'}}
b1.mu1_.Unlock();
b1.b_ = res;
mu.Unlock();
}
void late_bad_2() {
LateBar BarA;
BarA.FooPointer->mu.Lock();
BarA.Foo.a = 2; // \
// expected-warning{{writing variable 'a' requires holding mutex 'BarA.Foo.mu' exclusively}} \
// expected-note{{found near match 'BarA.FooPointer->mu'}}
BarA.FooPointer->mu.Unlock();
}
void late_bad_3() {
LateBar BarA;
BarA.Foo.mu.Lock();
BarA.FooPointer->a = 2; // \
// expected-warning{{writing variable 'a' requires holding mutex 'BarA.FooPointer->mu' exclusively}} \
// expected-note{{found near match 'BarA.Foo.mu'}}
BarA.Foo.mu.Unlock();
}
void late_bad_4() {
LateBar BarA;
BarA.Foo.mu.Lock();
BarA.Foo2.a = 2; // \
// expected-warning{{writing variable 'a' requires holding mutex 'BarA.Foo2.mu' exclusively}} \
// expected-note{{found near match 'BarA.Foo.mu'}}
BarA.Foo.mu.Unlock();
}
//-----------------------------------------------//
// Extra warnings for shared vs. exclusive locks
// ----------------------------------------------//
void shared_fun_0() {
sls_mu.Lock();
do {
sls_mu.Unlock();
sls_mu.Lock();
} while (getBool());
sls_mu.Unlock();
}
void shared_fun_1() {
sls_mu.ReaderLock(); // \
// expected-warning {{mutex 'sls_mu' is acquired exclusively and shared in the same scope}}
do {
sls_mu.Unlock();
sls_mu.Lock(); // \
// expected-note {{the other acquisition of mutex 'sls_mu' is here}}
} while (getBool());
sls_mu.Unlock();
}
void shared_fun_3() {
if (getBool())
sls_mu.Lock();
else
sls_mu.Lock();
*pgb_var = 1;
sls_mu.Unlock();
}
void shared_fun_4() {
if (getBool())
sls_mu.ReaderLock();
else
sls_mu.ReaderLock();
int x = sls_guardby_var;
sls_mu.Unlock();
}
void shared_fun_8() {
if (getBool())
sls_mu.Lock(); // \
// expected-warning {{mutex 'sls_mu' is acquired exclusively and shared in the same scope}}
else
sls_mu.ReaderLock(); // \
// expected-note {{the other acquisition of mutex 'sls_mu' is here}}
sls_mu.Unlock();
}
void shared_bad_0() {
sls_mu.Lock(); // \
// expected-warning {{mutex 'sls_mu' is acquired exclusively and shared in the same scope}}
do {
sls_mu.Unlock();
sls_mu.ReaderLock(); // \
// expected-note {{the other acquisition of mutex 'sls_mu' is here}}
} while (getBool());
sls_mu.Unlock();
}
void shared_bad_1() {
if (getBool())
sls_mu.Lock(); // \
// expected-warning {{mutex 'sls_mu' is acquired exclusively and shared in the same scope}}
else
sls_mu.ReaderLock(); // \
// expected-note {{the other acquisition of mutex 'sls_mu' is here}}
*pgb_var = 1;
sls_mu.Unlock();
}
void shared_bad_2() {
if (getBool())
sls_mu.ReaderLock(); // \
// expected-warning {{mutex 'sls_mu' is acquired exclusively and shared in the same scope}}
else
sls_mu.Lock(); // \
// expected-note {{the other acquisition of mutex 'sls_mu' is here}}
*pgb_var = 1;
sls_mu.Unlock();
}
// FIXME: Add support for functions (not only methods)
class LRBar {
public:
void aa_elr_fun() __attribute__((exclusive_locks_required(aa_mu)));
void aa_elr_fun_s() __attribute__((shared_locks_required(aa_mu)));
void le_fun() __attribute__((locks_excluded(sls_mu)));
};
class LRFoo {
public:
void test() __attribute__((exclusive_locks_required(sls_mu)));
void testShared() __attribute__((shared_locks_required(sls_mu2)));
};
void elr_fun() __attribute__((exclusive_locks_required(sls_mu)));
void elr_fun() {}
LRFoo MyLRFoo;
LRBar Bar;
void es_fun_0() {
aa_mu.Lock();
Bar.aa_elr_fun();
aa_mu.Unlock();
}
void es_fun_1() {
aa_mu.Lock();
Bar.aa_elr_fun_s();
aa_mu.Unlock();
}
void es_fun_2() {
aa_mu.ReaderLock();
Bar.aa_elr_fun_s();
aa_mu.Unlock();
}
void es_fun_3() {
sls_mu.Lock();
MyLRFoo.test();
sls_mu.Unlock();
}
void es_fun_4() {
sls_mu2.Lock();
MyLRFoo.testShared();
sls_mu2.Unlock();
}
void es_fun_5() {
sls_mu2.ReaderLock();
MyLRFoo.testShared();
sls_mu2.Unlock();
}
void es_fun_6() {
Bar.le_fun();
}
void es_fun_7() {
sls_mu.Lock();
elr_fun();
sls_mu.Unlock();
}
void es_fun_8() __attribute__((no_thread_safety_analysis));
void es_fun_8() {
Bar.aa_elr_fun_s();
}
void es_fun_9() __attribute__((shared_locks_required(aa_mu)));
void es_fun_9() {
Bar.aa_elr_fun_s();
}
void es_fun_10() __attribute__((exclusive_locks_required(aa_mu)));
void es_fun_10() {
Bar.aa_elr_fun_s();
}
void es_bad_0() {
Bar.aa_elr_fun(); // \
// expected-warning {{calling function 'aa_elr_fun' requires holding mutex 'aa_mu' exclusively}}
}
void es_bad_1() {
aa_mu.ReaderLock();
Bar.aa_elr_fun(); // \
// expected-warning {{calling function 'aa_elr_fun' requires holding mutex 'aa_mu' exclusively}}
aa_mu.Unlock();
}
void es_bad_2() {
Bar.aa_elr_fun_s(); // \
// expected-warning {{calling function 'aa_elr_fun_s' requires holding mutex 'aa_mu'}}
}
void es_bad_3() {
MyLRFoo.test(); // \
// expected-warning {{calling function 'test' requires holding mutex 'sls_mu' exclusively}}
}
void es_bad_4() {
MyLRFoo.testShared(); // \
// expected-warning {{calling function 'testShared' requires holding mutex 'sls_mu2'}}
}
void es_bad_5() {
sls_mu.ReaderLock();
MyLRFoo.test(); // \
// expected-warning {{calling function 'test' requires holding mutex 'sls_mu' exclusively}}
sls_mu.Unlock();
}
void es_bad_6() {
sls_mu.Lock();
Bar.le_fun(); // \
// expected-warning {{cannot call function 'le_fun' while mutex 'sls_mu' is held}}
sls_mu.Unlock();
}
void es_bad_7() {
sls_mu.ReaderLock();
Bar.le_fun(); // \
// expected-warning {{cannot call function 'le_fun' while mutex 'sls_mu' is held}}
sls_mu.Unlock();
}
//-----------------------------------------------//
// Unparseable lock expressions
// ----------------------------------------------//
// FIXME -- derive new tests for unhandled expressions
//----------------------------------------------------------------------------//
// The following test cases are ported from the gcc thread safety implementation
// They are each wrapped inside a namespace with the test number of the gcc test
//
// FIXME: add all the gcc tests, once this analysis passes them.
//----------------------------------------------------------------------------//
//-----------------------------------------//
// Good testcases (no errors)
//-----------------------------------------//
namespace thread_annot_lock_20 {
class Bar {
public:
static int func1() EXCLUSIVE_LOCKS_REQUIRED(mu1_);
static int b_ GUARDED_BY(mu1_);
static Mutex mu1_;
static int a_ GUARDED_BY(mu1_);
};
Bar b1;
int Bar::func1()
{
int res = 5;
if (a_ == 4)
res = b_;
return res;
}
} // end namespace thread_annot_lock_20
namespace thread_annot_lock_22 {
// Test various usage of GUARDED_BY and PT_GUARDED_BY annotations, especially
// uses in class definitions.
Mutex mu;
class Bar {
public:
int a_ GUARDED_BY(mu1_);
int b_;
int *q PT_GUARDED_BY(mu);
Mutex mu1_ ACQUIRED_AFTER(mu);
};
Bar b1, *b3;
int *p GUARDED_BY(mu) PT_GUARDED_BY(mu);
int res GUARDED_BY(mu) = 5;
int func(int i)
{
int x;
mu.Lock();
b1.mu1_.Lock();
res = b1.a_ + b3->b_;
*p = i;
b1.a_ = res + b3->b_;
b3->b_ = *b1.q;
b1.mu1_.Unlock();
b1.b_ = res;
x = res;
mu.Unlock();
return x;
}
} // end namespace thread_annot_lock_22
namespace thread_annot_lock_27_modified {
// test lock annotations applied to function definitions
// Modified: applied annotations only to function declarations
Mutex mu1;
Mutex mu2 ACQUIRED_AFTER(mu1);
class Foo {
public:
int method1(int i) SHARED_LOCKS_REQUIRED(mu2) EXCLUSIVE_LOCKS_REQUIRED(mu1);
};
int Foo::method1(int i) {
return i;
}
int foo(int i) EXCLUSIVE_LOCKS_REQUIRED(mu2) SHARED_LOCKS_REQUIRED(mu1);
int foo(int i) {
return i;
}
static int bar(int i) EXCLUSIVE_LOCKS_REQUIRED(mu1);
static int bar(int i) {
return i;
}
void main() {
Foo a;
mu1.Lock();
mu2.Lock();
a.method1(1);
foo(2);
mu2.Unlock();
bar(3);
mu1.Unlock();
}
} // end namespace thread_annot_lock_27_modified
namespace thread_annot_lock_38 {
// Test the case where a template member function is annotated with lock
// attributes in a non-template class.
class Foo {
public:
void func1(int y) LOCKS_EXCLUDED(mu_);
template <typename T> void func2(T x) LOCKS_EXCLUDED(mu_);
private:
Mutex mu_;
};
Foo *foo;
void main()
{
foo->func1(5);
foo->func2(5);
}
} // end namespace thread_annot_lock_38
namespace thread_annot_lock_43 {
// Tests lock canonicalization
class Foo {
public:
Mutex *mu_;
};
class FooBar {
public:
Foo *foo_;
int GetA() EXCLUSIVE_LOCKS_REQUIRED(foo_->mu_) { return a_; }
int a_ GUARDED_BY(foo_->mu_);
};
FooBar *fb;
void main()
{
int x;
fb->foo_->mu_->Lock();
x = fb->GetA();
fb->foo_->mu_->Unlock();
}
} // end namespace thread_annot_lock_43
namespace thread_annot_lock_49 {
// Test the support for use of lock expression in the annotations
class Foo {
public:
Mutex foo_mu_;
};
class Bar {
private:
Foo *foo;
Mutex bar_mu_ ACQUIRED_AFTER(foo->foo_mu_);
public:
void Test1() {
foo->foo_mu_.Lock();
bar_mu_.Lock();
bar_mu_.Unlock();
foo->foo_mu_.Unlock();
}
};
void main() {
Bar bar;
bar.Test1();
}
} // end namespace thread_annot_lock_49
namespace thread_annot_lock_61_modified {
// Modified to fix the compiler errors
// Test the fix for a bug introduced by the support of pass-by-reference
// paramters.
struct Foo { Foo &operator<< (bool) {return *this;} };
Foo &getFoo();
struct Bar { Foo &func () {return getFoo();} };
struct Bas { void operator& (Foo &) {} };
void mumble()
{
Bas() & Bar().func() << "" << "";
Bas() & Bar().func() << "";
}
} // end namespace thread_annot_lock_61_modified
namespace thread_annot_lock_65 {
// Test the fix for a bug in the support of allowing reader locks for
// non-const, non-modifying overload functions. (We didn't handle the builtin
// properly.)
enum MyFlags {
Zero,
One,
Two,
Three,
Four,
Five,
Six,
Seven,
Eight,
Nine
};
inline MyFlags
operator|(MyFlags a, MyFlags b)
{
return MyFlags(static_cast<int>(a) | static_cast<int>(b));
}
inline MyFlags&
operator|=(MyFlags& a, MyFlags b)
{
return a = a | b;
}
} // end namespace thread_annot_lock_65
namespace thread_annot_lock_66_modified {
// Modified: Moved annotation to function defn
// Test annotations on out-of-line definitions of member functions where the
// annotations refer to locks that are also data members in the class.
Mutex mu;
class Foo {
public:
int method1(int i) SHARED_LOCKS_REQUIRED(mu1, mu, mu2);
int data GUARDED_BY(mu1);
Mutex *mu1;
Mutex *mu2;
};
int Foo::method1(int i)
{
return data + i;
}
void main()
{
Foo a;
a.mu2->Lock();
a.mu1->Lock();
mu.Lock();
a.method1(1);
mu.Unlock();
a.mu1->Unlock();
a.mu2->Unlock();
}
} // end namespace thread_annot_lock_66_modified
namespace thread_annot_lock_68_modified {
// Test a fix to a bug in the delayed name binding with nested template
// instantiation. We use a stack to make sure a name is not resolved to an
// inner context.
template <typename T>
class Bar {
Mutex mu_;
};
template <typename T>
class Foo {
public:
void func(T x) {
mu_.Lock();
count_ = x;
mu_.Unlock();
}
private:
T count_ GUARDED_BY(mu_);
Bar<T> bar_;
Mutex mu_;
};
void main()
{
Foo<int> *foo;
foo->func(5);
}
} // end namespace thread_annot_lock_68_modified
namespace thread_annot_lock_30_modified {
// Test delay parsing of lock attribute arguments with nested classes.
// Modified: trylocks replaced with exclusive_lock_fun
int a = 0;
class Bar {
struct Foo;
public:
void MyLock() EXCLUSIVE_LOCK_FUNCTION(mu);
int func() {
MyLock();
// if (foo == 0) {
// return 0;
// }
a = 5;
mu.Unlock();
return 1;
}
class FooBar {
int x;
int y;
};
private:
Mutex mu;
};
Bar *bar;
void main()
{
bar->func();
}
} // end namespace thread_annot_lock_30_modified
namespace thread_annot_lock_47 {
// Test the support for annotations on virtual functions.
// This is a good test case. (i.e. There should be no warning emitted by the
// compiler.)
class Base {
public:
virtual void func1() EXCLUSIVE_LOCKS_REQUIRED(mu_);
virtual void func2() LOCKS_EXCLUDED(mu_);
Mutex mu_;
};
class Child : public Base {
public:
virtual void func1() EXCLUSIVE_LOCKS_REQUIRED(mu_);
virtual void func2() LOCKS_EXCLUDED(mu_);
};
void main() {
Child *c;
Base *b = c;
b->mu_.Lock();
b->func1();
b->mu_.Unlock();
b->func2();
c->mu_.Lock();
c->func1();
c->mu_.Unlock();
c->func2();
}
} // end namespace thread_annot_lock_47
//-----------------------------------------//
// Tests which produce errors
//-----------------------------------------//
namespace thread_annot_lock_13 {
Mutex mu1;
Mutex mu2;
int g GUARDED_BY(mu1);
int w GUARDED_BY(mu2);
class Foo {
public:
void bar() LOCKS_EXCLUDED(mu_, mu1);
int foo() SHARED_LOCKS_REQUIRED(mu_) EXCLUSIVE_LOCKS_REQUIRED(mu2);
private:
int a_ GUARDED_BY(mu_);
public:
Mutex mu_ ACQUIRED_AFTER(mu1);
};
int Foo::foo()
{
int res;
w = 5;
res = a_ + 5;
return res;
}
void Foo::bar()
{
int x;
mu_.Lock();
x = foo(); // expected-warning {{calling function 'foo' requires holding mutex 'mu2' exclusively}}
a_ = x + 1;
mu_.Unlock();
if (x > 5) {
mu1.Lock();
g = 2;
mu1.Unlock();
}
}
void main()
{
Foo f1, *f2;
f1.mu_.Lock();
f1.bar(); // expected-warning {{cannot call function 'bar' while mutex 'f1.mu_' is held}}
mu2.Lock();
f1.foo();
mu2.Unlock();
f1.mu_.Unlock();
f2->mu_.Lock();
f2->bar(); // expected-warning {{cannot call function 'bar' while mutex 'f2->mu_' is held}}
f2->mu_.Unlock();
mu2.Lock();
w = 2;
mu2.Unlock();
}
} // end namespace thread_annot_lock_13
namespace thread_annot_lock_18_modified {
// Modified: Trylocks removed
// Test the ability to distnguish between the same lock field of
// different objects of a class.
class Bar {
public:
bool MyLock() EXCLUSIVE_LOCK_FUNCTION(mu1_);
void MyUnlock() UNLOCK_FUNCTION(mu1_);
int a_ GUARDED_BY(mu1_);
private:
Mutex mu1_;
};
Bar *b1, *b2;
void func()
{
b1->MyLock();
b1->a_ = 5;
b2->a_ = 3; // \
// expected-warning {{writing variable 'a_' requires holding mutex 'b2->mu1_' exclusively}} \
// expected-note {{found near match 'b1->mu1_'}}
b2->MyLock();
b2->MyUnlock();
b1->MyUnlock();
}
} // end namespace thread_annot_lock_18_modified
namespace thread_annot_lock_21 {
// Test various usage of GUARDED_BY and PT_GUARDED_BY annotations, especially
// uses in class definitions.
Mutex mu;
class Bar {
public:
int a_ GUARDED_BY(mu1_);
int b_;
int *q PT_GUARDED_BY(mu);
Mutex mu1_ ACQUIRED_AFTER(mu);
};
Bar b1, *b3;
int *p GUARDED_BY(mu) PT_GUARDED_BY(mu);
int res GUARDED_BY(mu) = 5;
int func(int i)
{
int x;
b3->mu1_.Lock();
res = b1.a_ + b3->b_; // expected-warning {{reading variable 'a_' requires holding mutex 'b1.mu1_'}} \
// expected-warning {{writing variable 'res' requires holding mutex 'mu' exclusively}} \
// expected-note {{found near match 'b3->mu1_'}}
*p = i; // expected-warning {{reading variable 'p' requires holding mutex 'mu'}} \
// expected-warning {{writing the value pointed to by 'p' requires holding mutex 'mu' exclusively}}
b1.a_ = res + b3->b_; // expected-warning {{reading variable 'res' requires holding mutex 'mu'}} \
// expected-warning {{writing variable 'a_' requires holding mutex 'b1.mu1_' exclusively}} \
// expected-note {{found near match 'b3->mu1_'}}
b3->b_ = *b1.q; // expected-warning {{reading the value pointed to by 'q' requires holding mutex 'mu'}}
b3->mu1_.Unlock();
b1.b_ = res; // expected-warning {{reading variable 'res' requires holding mutex 'mu'}}
x = res; // expected-warning {{reading variable 'res' requires holding mutex 'mu'}}
return x;
}
} // end namespace thread_annot_lock_21
namespace thread_annot_lock_35_modified {
// Test the analyzer's ability to distinguish the lock field of different
// objects.
class Foo {
private:
Mutex lock_;
int a_ GUARDED_BY(lock_);
public:
void Func(Foo* child) LOCKS_EXCLUDED(lock_) {
Foo *new_foo = new Foo;
lock_.Lock();
child->Func(new_foo); // There shouldn't be any warning here as the
// acquired lock is not in child.
child->bar(7); // \
// expected-warning {{calling function 'bar' requires holding mutex 'child->lock_' exclusively}} \
// expected-note {{found near match 'lock_'}}
child->a_ = 5; // \
// expected-warning {{writing variable 'a_' requires holding mutex 'child->lock_' exclusively}} \
// expected-note {{found near match 'lock_'}}
lock_.Unlock();
}
void bar(int y) EXCLUSIVE_LOCKS_REQUIRED(lock_) {
a_ = y;
}
};
Foo *x;
void main() {
Foo *child = new Foo;
x->Func(child);
}
} // end namespace thread_annot_lock_35_modified
namespace thread_annot_lock_36_modified {
// Modified to move the annotations to function defns.
// Test the analyzer's ability to distinguish the lock field of different
// objects
class Foo {
private:
Mutex lock_;
int a_ GUARDED_BY(lock_);
public:
void Func(Foo* child) LOCKS_EXCLUDED(lock_);
void bar(int y) EXCLUSIVE_LOCKS_REQUIRED(lock_);
};
void Foo::Func(Foo* child) {
Foo *new_foo = new Foo;
lock_.Lock();
child->lock_.Lock();
child->Func(new_foo); // expected-warning {{cannot call function 'Func' while mutex 'child->lock_' is held}}
child->bar(7);
child->a_ = 5;
child->lock_.Unlock();
lock_.Unlock();
}
void Foo::bar(int y) {
a_ = y;
}
Foo *x;
void main() {
Foo *child = new Foo;
x->Func(child);
}
} // end namespace thread_annot_lock_36_modified
namespace thread_annot_lock_42 {
// Test support of multiple lock attributes of the same kind on a decl.
class Foo {
private:
Mutex mu1, mu2, mu3;
int x GUARDED_BY(mu1) GUARDED_BY(mu2);
int y GUARDED_BY(mu2);
void f2() LOCKS_EXCLUDED(mu1) LOCKS_EXCLUDED(mu2) LOCKS_EXCLUDED(mu3) {
mu2.Lock();
y = 2;
mu2.Unlock();
}
public:
void f1() EXCLUSIVE_LOCKS_REQUIRED(mu2) EXCLUSIVE_LOCKS_REQUIRED(mu1) {
x = 5;
f2(); // expected-warning {{cannot call function 'f2' while mutex 'mu1' is held}} \
// expected-warning {{cannot call function 'f2' while mutex 'mu2' is held}}
}
};
Foo *foo;
void func()
{
foo->f1(); // expected-warning {{calling function 'f1' requires holding mutex 'foo->mu2' exclusively}} \
// expected-warning {{calling function 'f1' requires holding mutex 'foo->mu1' exclusively}}
}
} // end namespace thread_annot_lock_42
namespace thread_annot_lock_46 {
// Test the support for annotations on virtual functions.
class Base {
public:
virtual void func1() EXCLUSIVE_LOCKS_REQUIRED(mu_);
virtual void func2() LOCKS_EXCLUDED(mu_);
Mutex mu_;
};
class Child : public Base {
public:
virtual void func1() EXCLUSIVE_LOCKS_REQUIRED(mu_);
virtual void func2() LOCKS_EXCLUDED(mu_);
};
void main() {
Child *c;
Base *b = c;
b->func1(); // expected-warning {{calling function 'func1' requires holding mutex 'b->mu_' exclusively}}
b->mu_.Lock();
b->func2(); // expected-warning {{cannot call function 'func2' while mutex 'b->mu_' is held}}
b->mu_.Unlock();
c->func1(); // expected-warning {{calling function 'func1' requires holding mutex 'c->mu_' exclusively}}
c->mu_.Lock();
c->func2(); // expected-warning {{cannot call function 'func2' while mutex 'c->mu_' is held}}
c->mu_.Unlock();
}
} // end namespace thread_annot_lock_46
namespace thread_annot_lock_67_modified {
// Modified: attributes on definitions moved to declarations
// Test annotations on out-of-line definitions of member functions where the
// annotations refer to locks that are also data members in the class.
Mutex mu;
Mutex mu3;
class Foo {
public:
int method1(int i) SHARED_LOCKS_REQUIRED(mu1, mu, mu2, mu3);
int data GUARDED_BY(mu1);
Mutex *mu1;
Mutex *mu2;
};
int Foo::method1(int i) {
return data + i;
}
void main()
{
Foo a;
a.method1(1); // expected-warning {{calling function 'method1' requires holding mutex 'a.mu1'}} \
// expected-warning {{calling function 'method1' requires holding mutex 'mu'}} \
// expected-warning {{calling function 'method1' requires holding mutex 'a.mu2'}} \
// expected-warning {{calling function 'method1' requires holding mutex 'mu3'}}
}
} // end namespace thread_annot_lock_67_modified
namespace substitution_test {
class MyData {
public:
Mutex mu;
void lockData() __attribute__((exclusive_lock_function(mu)));
void unlockData() __attribute__((unlock_function(mu)));
void doSomething() __attribute__((exclusive_locks_required(mu))) { }
};
class DataLocker {
public:
void lockData (MyData *d) __attribute__((exclusive_lock_function(d->mu)));
void unlockData(MyData *d) __attribute__((unlock_function(d->mu)));
};
class Foo {
public:
void foo(MyData* d) __attribute__((exclusive_locks_required(d->mu))) { }
void bar1(MyData* d) {
d->lockData();
foo(d);
d->unlockData();
}
void bar2(MyData* d) {
DataLocker dlr;
dlr.lockData(d);
foo(d);
dlr.unlockData(d);
}
void bar3(MyData* d1, MyData* d2) {
DataLocker dlr;
dlr.lockData(d1); // expected-note {{mutex acquired here}}
dlr.unlockData(d2); // \
// expected-warning {{releasing mutex 'd2->mu' that was not held}}
} // expected-warning {{mutex 'd1->mu' is still held at the end of function}}
void bar4(MyData* d1, MyData* d2) {
DataLocker dlr;
dlr.lockData(d1);
foo(d2); // \
// expected-warning {{calling function 'foo' requires holding mutex 'd2->mu' exclusively}} \
// expected-note {{found near match 'd1->mu'}}
dlr.unlockData(d1);
}
};
} // end namespace substituation_test
namespace constructor_destructor_tests {
Mutex fooMu;
int myVar GUARDED_BY(fooMu);
class Foo {
public:
Foo() __attribute__((exclusive_lock_function(fooMu))) { }
~Foo() __attribute__((unlock_function(fooMu))) { }
};
void fooTest() {
Foo foo;
myVar = 0;
}
}
namespace template_member_test {
struct S { int n; };
struct T {
Mutex m;
S *s GUARDED_BY(this->m);
};
Mutex m;
struct U {
union {
int n;
};
} *u GUARDED_BY(m);
template<typename U>
struct IndirectLock {
int DoNaughtyThings(T *t) {
u->n = 0; // expected-warning {{reading variable 'u' requires holding mutex 'm'}}
return t->s->n; // expected-warning {{reading variable 's' requires holding mutex 't->m'}}
}
};
template struct IndirectLock<int>; // expected-note {{here}}
struct V {
void f(int);
void f(double);
Mutex m;
V *p GUARDED_BY(this->m);
};
template<typename U> struct W {
V v;
void f(U u) {
v.p->f(u); // expected-warning {{reading variable 'p' requires holding mutex 'v.m'}}
}
};
template struct W<int>; // expected-note {{here}}
}
namespace test_scoped_lockable {
struct TestScopedLockable {
Mutex mu1;
Mutex mu2;
int a __attribute__((guarded_by(mu1)));
int b __attribute__((guarded_by(mu2)));
bool getBool();
void foo1() {
MutexLock mulock(&mu1);
a = 5;
}
void foo2() {
ReaderMutexLock mulock1(&mu1);
if (getBool()) {
MutexLock mulock2a(&mu2);
b = a + 1;
}
else {
MutexLock mulock2b(&mu2);
b = a + 2;
}
}
void foo3() {
MutexLock mulock_a(&mu1);
MutexLock mulock_b(&mu1); // \
// expected-warning {{acquiring mutex 'mu1' that is already held}}
}
void foo4() {
MutexLock mulock1(&mu1), mulock2(&mu2);
a = b+1;
b = a+1;
}
void foo5() {
DoubleMutexLock mulock(&mu1, &mu2);
a = b + 1;
b = a + 1;
}
};
} // end namespace test_scoped_lockable
namespace FunctionAttrTest {
class Foo {
public:
Mutex mu_;
int a GUARDED_BY(mu_);
};
Foo fooObj;
void foo() EXCLUSIVE_LOCKS_REQUIRED(fooObj.mu_);
void bar() {
foo(); // expected-warning {{calling function 'foo' requires holding mutex 'fooObj.mu_' exclusively}}
fooObj.mu_.Lock();
foo();
fooObj.mu_.Unlock();
}
}; // end namespace FunctionAttrTest
namespace TryLockTest {
struct TestTryLock {
Mutex mu;
int a GUARDED_BY(mu);
bool cond;
void foo1() {
if (mu.TryLock()) {
a = 1;
mu.Unlock();
}
}
void foo2() {
if (!mu.TryLock()) return;
a = 2;
mu.Unlock();
}
void foo3() {
bool b = mu.TryLock();
if (b) {
a = 3;
mu.Unlock();
}
}
void foo4() {
bool b = mu.TryLock();
if (!b) return;
a = 4;
mu.Unlock();
}
void foo5() {
while (mu.TryLock()) {
a = a + 1;
mu.Unlock();
}
}
void foo6() {
bool b = mu.TryLock();
b = !b;
if (b) return;
a = 6;
mu.Unlock();
}
void foo7() {
bool b1 = mu.TryLock();
bool b2 = !b1;
bool b3 = !b2;
if (b3) {
a = 7;
mu.Unlock();
}
}
// Test use-def chains: join points
void foo8() {
bool b = mu.TryLock();
bool b2 = b;
if (cond)
b = true;
if (b) { // b should be unknown at this point, because of the join point
a = 8; // expected-warning {{writing variable 'a' requires holding mutex 'mu' exclusively}}
}
if (b2) { // b2 should be known at this point.
a = 8;
mu.Unlock();
}
}
// Test use-def-chains: back edges
void foo9() {
bool b = mu.TryLock();
for (int i = 0; i < 10; ++i);
if (b) { // b is still known, because the loop doesn't alter it
a = 9;
mu.Unlock();
}
}
// Test use-def chains: back edges
void foo10() {
bool b = mu.TryLock();
while (cond) {
if (b) { // b should be uknown at this point b/c of the loop
a = 10; // expected-warning {{writing variable 'a' requires holding mutex 'mu' exclusively}}
}
b = !b;
}
}
// Test merge of exclusive trylock
void foo11() {
if (cond) {
if (!mu.TryLock())
return;
}
else {
mu.Lock();
}
a = 10;
mu.Unlock();
}
// Test merge of shared trylock
void foo12() {
if (cond) {
if (!mu.ReaderTryLock())
return;
}
else {
mu.ReaderLock();
}
int i = a;
mu.Unlock();
}
}; // end TestTrylock
} // end namespace TrylockTest
namespace TestTemplateAttributeInstantiation {
class Foo1 {
public:
Mutex mu_;
int a GUARDED_BY(mu_);
};
class Foo2 {
public:
int a GUARDED_BY(mu_);
Mutex mu_;
};
class Bar {
public:
// Test non-dependent expressions in attributes on template functions
template <class T>
void barND(Foo1 *foo, T *fooT) EXCLUSIVE_LOCKS_REQUIRED(foo->mu_) {
foo->a = 0;
}
// Test dependent expressions in attributes on template functions
template <class T>
void barD(Foo1 *foo, T *fooT) EXCLUSIVE_LOCKS_REQUIRED(fooT->mu_) {
fooT->a = 0;
}
};
template <class T>
class BarT {
public:
Foo1 fooBase;
T fooBaseT;
// Test non-dependent expression in ordinary method on template class
void barND() EXCLUSIVE_LOCKS_REQUIRED(fooBase.mu_) {
fooBase.a = 0;
}
// Test dependent expressions in ordinary methods on template class
void barD() EXCLUSIVE_LOCKS_REQUIRED(fooBaseT.mu_) {
fooBaseT.a = 0;
}
// Test dependent expressions in template method in template class
template <class T2>
void barTD(T2 *fooT) EXCLUSIVE_LOCKS_REQUIRED(fooBaseT.mu_, fooT->mu_) {
fooBaseT.a = 0;
fooT->a = 0;
}
};
template <class T>
class Cell {
public:
Mutex mu_;
// Test dependent guarded_by
T data GUARDED_BY(mu_);
void fooEx() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
data = 0;
}
void foo() {
mu_.Lock();
data = 0;
mu_.Unlock();
}
};
void test() {
Bar b;
BarT<Foo2> bt;
Foo1 f1;
Foo2 f2;
f1.mu_.Lock();
f2.mu_.Lock();
bt.fooBase.mu_.Lock();
bt.fooBaseT.mu_.Lock();
b.barND(&f1, &f2);
b.barD(&f1, &f2);
bt.barND();
bt.barD();
bt.barTD(&f2);
f1.mu_.Unlock();
bt.barTD(&f1); // \
// expected-warning {{calling function 'barTD' requires holding mutex 'f1.mu_' exclusively}} \
// expected-note {{found near match 'bt.fooBase.mu_'}}
bt.fooBase.mu_.Unlock();
bt.fooBaseT.mu_.Unlock();
f2.mu_.Unlock();
Cell<int> cell;
cell.data = 0; // \
// expected-warning {{writing variable 'data' requires holding mutex 'cell.mu_' exclusively}}
cell.foo();
cell.mu_.Lock();
cell.fooEx();
cell.mu_.Unlock();
}
template <class T>
class CellDelayed {
public:
// Test dependent guarded_by
T data GUARDED_BY(mu_);
static T static_data GUARDED_BY(static_mu_);
void fooEx(CellDelayed<T> *other) EXCLUSIVE_LOCKS_REQUIRED(mu_, other->mu_) {
this->data = other->data;
}
template <class T2>
void fooExT(CellDelayed<T2> *otherT) EXCLUSIVE_LOCKS_REQUIRED(mu_, otherT->mu_) {
this->data = otherT->data;
}
void foo() {
mu_.Lock();
data = 0;
mu_.Unlock();
}
Mutex mu_;
static Mutex static_mu_;
};
void testDelayed() {
CellDelayed<int> celld;
CellDelayed<int> celld2;
celld.foo();
celld.mu_.Lock();
celld2.mu_.Lock();
celld.fooEx(&celld2);
celld.fooExT(&celld2);
celld2.mu_.Unlock();
celld.mu_.Unlock();
}
}; // end namespace TestTemplateAttributeInstantiation
namespace FunctionDeclDefTest {
class Foo {
public:
Mutex mu_;
int a GUARDED_BY(mu_);
virtual void foo1(Foo *f_declared) EXCLUSIVE_LOCKS_REQUIRED(f_declared->mu_);
};
// EXCLUSIVE_LOCKS_REQUIRED should be applied, and rewritten to f_defined->mu_
void Foo::foo1(Foo *f_defined) {
f_defined->a = 0;
};
void test() {
Foo myfoo;
myfoo.foo1(&myfoo); // \
// expected-warning {{calling function 'foo1' requires holding mutex 'myfoo.mu_' exclusively}}
myfoo.mu_.Lock();
myfoo.foo1(&myfoo);
myfoo.mu_.Unlock();
}
};
namespace GoingNative {
struct __attribute__((lockable)) mutex {
void lock() __attribute__((exclusive_lock_function));
void unlock() __attribute__((unlock_function));
// ...
};
bool foo();
bool bar();
mutex m;
void test() {
m.lock();
while (foo()) {
m.unlock();
// ...
if (bar()) {
// ...
if (foo())
continue; // expected-warning {{expecting mutex 'm' to be held at start of each loop}}
//...
}
// ...
m.lock(); // expected-note {{mutex acquired here}}
}
m.unlock();
}
}
namespace FunctionDefinitionTest {
class Foo {
public:
void foo1();
void foo2();
void foo3(Foo *other);
template<class T>
void fooT1(const T& dummy1);
template<class T>
void fooT2(const T& dummy2) EXCLUSIVE_LOCKS_REQUIRED(mu_);
Mutex mu_;
int a GUARDED_BY(mu_);
};
template<class T>
class FooT {
public:
void foo();
Mutex mu_;
T a GUARDED_BY(mu_);
};
void Foo::foo1() NO_THREAD_SAFETY_ANALYSIS {
a = 1;
}
void Foo::foo2() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
a = 2;
}
void Foo::foo3(Foo *other) EXCLUSIVE_LOCKS_REQUIRED(other->mu_) {
other->a = 3;
}
template<class T>
void Foo::fooT1(const T& dummy1) EXCLUSIVE_LOCKS_REQUIRED(mu_) {
a = dummy1;
}
/* TODO -- uncomment with template instantiation of attributes.
template<class T>
void Foo::fooT2(const T& dummy2) {
a = dummy2;
}
*/
void fooF1(Foo *f) EXCLUSIVE_LOCKS_REQUIRED(f->mu_) {
f->a = 1;
}
void fooF2(Foo *f);
void fooF2(Foo *f) EXCLUSIVE_LOCKS_REQUIRED(f->mu_) {
f->a = 2;
}
void fooF3(Foo *f) EXCLUSIVE_LOCKS_REQUIRED(f->mu_);
void fooF3(Foo *f) {
f->a = 3;
}
template<class T>
void FooT<T>::foo() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
a = 0;
}
void test() {
int dummy = 0;
Foo myFoo;
myFoo.foo2(); // \
// expected-warning {{calling function 'foo2' requires holding mutex 'myFoo.mu_' exclusively}}
myFoo.foo3(&myFoo); // \
// expected-warning {{calling function 'foo3' requires holding mutex 'myFoo.mu_' exclusively}}
myFoo.fooT1(dummy); // \
// expected-warning {{calling function 'fooT1' requires holding mutex 'myFoo.mu_' exclusively}}
myFoo.fooT2(dummy); // \
// expected-warning {{calling function 'fooT2' requires holding mutex 'myFoo.mu_' exclusively}}
fooF1(&myFoo); // \
// expected-warning {{calling function 'fooF1' requires holding mutex 'myFoo.mu_' exclusively}}
fooF2(&myFoo); // \
// expected-warning {{calling function 'fooF2' requires holding mutex 'myFoo.mu_' exclusively}}
fooF3(&myFoo); // \
// expected-warning {{calling function 'fooF3' requires holding mutex 'myFoo.mu_' exclusively}}
myFoo.mu_.Lock();
myFoo.foo2();
myFoo.foo3(&myFoo);
myFoo.fooT1(dummy);
myFoo.fooT2(dummy);
fooF1(&myFoo);
fooF2(&myFoo);
fooF3(&myFoo);
myFoo.mu_.Unlock();
FooT<int> myFooT;
myFooT.foo(); // \
// expected-warning {{calling function 'foo' requires holding mutex 'myFooT.mu_' exclusively}}
}
} // end namespace FunctionDefinitionTest
namespace SelfLockingTest {
class LOCKABLE MyLock {
public:
int foo GUARDED_BY(this);
void lock() EXCLUSIVE_LOCK_FUNCTION();
void unlock() UNLOCK_FUNCTION();
void doSomething() {
this->lock(); // allow 'this' as a lock expression
foo = 0;
doSomethingElse();
this->unlock();
}
void doSomethingElse() EXCLUSIVE_LOCKS_REQUIRED(this) {
foo = 1;
};
void test() {
foo = 2; // \
// expected-warning {{writing variable 'foo' requires holding mutex 'this' exclusively}}
}
};
class LOCKABLE MyLock2 {
public:
Mutex mu_;
int foo GUARDED_BY(this);
// don't check inside lock and unlock functions
void lock() EXCLUSIVE_LOCK_FUNCTION() { mu_.Lock(); }
void unlock() UNLOCK_FUNCTION() { mu_.Unlock(); }
// don't check inside constructors and destructors
MyLock2() { foo = 1; }
~MyLock2() { foo = 0; }
};
} // end namespace SelfLockingTest
namespace InvalidNonstatic {
// Forward decl here causes bogus "invalid use of non-static data member"
// on reference to mutex_ in guarded_by attribute.
class Foo;
class Foo {
Mutex* mutex_;
int foo __attribute__((guarded_by(mutex_)));
};
} // end namespace InvalidNonStatic
namespace NoReturnTest {
bool condition();
void fatal() __attribute__((noreturn));
Mutex mu_;
void test1() {
MutexLock lock(&mu_);
if (condition()) {
fatal();
return;
}
}
} // end namespace NoReturnTest
namespace TestMultiDecl {
class Foo {
public:
int GUARDED_BY(mu_) a;
int GUARDED_BY(mu_) b, c;
void foo() {
a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
b = 0; // \
// expected-warning {{writing variable 'b' requires holding mutex 'mu_' exclusively}}
c = 0; // \
// expected-warning {{writing variable 'c' requires holding mutex 'mu_' exclusively}}
}
private:
Mutex mu_;
};
} // end namespace TestMultiDecl
namespace WarnNoDecl {
class Foo {
void foo(int a); __attribute__(( // \
// expected-warning {{declaration does not declare anything}}
exclusive_locks_required(a))); // \
// expected-warning {{attribute exclusive_locks_required ignored}}
};
} // end namespace WarnNoDecl
namespace MoreLockExpressions {
class Foo {
public:
Mutex mu_;
int a GUARDED_BY(mu_);
};
class Bar {
public:
int b;
Foo* f;
Foo& getFoo() { return *f; }
Foo& getFoo2(int c) { return *f; }
Foo& getFoo3(int c, int d) { return *f; }
Foo& getFooey() { return *f; }
};
Foo& getBarFoo(Bar &bar, int c) { return bar.getFoo2(c); }
void test() {
Foo foo;
Foo *fooArray;
Bar bar;
int a;
int b;
int c;
bar.getFoo().mu_.Lock();
bar.getFoo().a = 0;
bar.getFoo().mu_.Unlock();
(bar.getFoo().mu_).Lock(); // test parenthesis
bar.getFoo().a = 0;
(bar.getFoo().mu_).Unlock();
bar.getFoo2(a).mu_.Lock();
bar.getFoo2(a).a = 0;
bar.getFoo2(a).mu_.Unlock();
bar.getFoo3(a, b).mu_.Lock();
bar.getFoo3(a, b).a = 0;
bar.getFoo3(a, b).mu_.Unlock();
getBarFoo(bar, a).mu_.Lock();
getBarFoo(bar, a).a = 0;
getBarFoo(bar, a).mu_.Unlock();
bar.getFoo2(10).mu_.Lock();
bar.getFoo2(10).a = 0;
bar.getFoo2(10).mu_.Unlock();
bar.getFoo2(a + 1).mu_.Lock();
bar.getFoo2(a + 1).a = 0;
bar.getFoo2(a + 1).mu_.Unlock();
(a > 0 ? fooArray[1] : fooArray[b]).mu_.Lock();
(a > 0 ? fooArray[1] : fooArray[b]).a = 0;
(a > 0 ? fooArray[1] : fooArray[b]).mu_.Unlock();
}
void test2() {
Foo *fooArray;
Bar bar;
int a;
int b;
int c;
bar.getFoo().mu_.Lock();
bar.getFooey().a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex 'bar.getFooey().mu_' exclusively}} \
// expected-note {{found near match 'bar.getFoo().mu_'}}
bar.getFoo().mu_.Unlock();
bar.getFoo2(a).mu_.Lock();
bar.getFoo2(b).a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex 'bar.getFoo2(b).mu_' exclusively}} \
// expected-note {{found near match 'bar.getFoo2(a).mu_'}}
bar.getFoo2(a).mu_.Unlock();
bar.getFoo3(a, b).mu_.Lock();
bar.getFoo3(a, c).a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex 'bar.getFoo3(a, c).mu_' exclusively}} \
// expected-note {{found near match 'bar.getFoo3(a, b).mu_'}}
bar.getFoo3(a, b).mu_.Unlock();
getBarFoo(bar, a).mu_.Lock();
getBarFoo(bar, b).a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex 'getBarFoo(bar, b).mu_' exclusively}} \
// expected-note {{found near match 'getBarFoo(bar, a).mu_'}}
getBarFoo(bar, a).mu_.Unlock();
(a > 0 ? fooArray[1] : fooArray[b]).mu_.Lock();
(a > 0 ? fooArray[b] : fooArray[c]).a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex '((0 < a) ? fooArray[b] : fooArray[c]).mu_' exclusively}} \
// expected-note {{found near match '((0 < a) ? fooArray[1] : fooArray[b]).mu_'}}
(a > 0 ? fooArray[1] : fooArray[b]).mu_.Unlock();
}
} // end namespace MoreLockExpressions
namespace TrylockJoinPoint {
class Foo {
Mutex mu;
bool c;
void foo() {
if (c) {
if (!mu.TryLock())
return;
} else {
mu.Lock();
}
mu.Unlock();
}
};
} // end namespace TrylockJoinPoint
namespace LockReturned {
class Foo {
public:
int a GUARDED_BY(mu_);
void foo() EXCLUSIVE_LOCKS_REQUIRED(mu_);
void foo2(Foo* f) EXCLUSIVE_LOCKS_REQUIRED(mu_, f->mu_);
static void sfoo(Foo* f) EXCLUSIVE_LOCKS_REQUIRED(f->mu_);
Mutex* getMu() LOCK_RETURNED(mu_);
Mutex mu_;
static Mutex* getMu(Foo* f) LOCK_RETURNED(f->mu_);
};
// Calls getMu() directly to lock and unlock
void test1(Foo* f1, Foo* f2) {
f1->a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'f1->mu_' exclusively}}
f1->foo(); // expected-warning {{calling function 'foo' requires holding mutex 'f1->mu_' exclusively}}
f1->foo2(f2); // expected-warning {{calling function 'foo2' requires holding mutex 'f1->mu_' exclusively}} \
// expected-warning {{calling function 'foo2' requires holding mutex 'f2->mu_' exclusively}}
Foo::sfoo(f1); // expected-warning {{calling function 'sfoo' requires holding mutex 'f1->mu_' exclusively}}
f1->getMu()->Lock();
f1->a = 0;
f1->foo();
f1->foo2(f2); // \
// expected-warning {{calling function 'foo2' requires holding mutex 'f2->mu_' exclusively}} \
// expected-note {{found near match 'f1->mu_'}}
Foo::getMu(f2)->Lock();
f1->foo2(f2);
Foo::getMu(f2)->Unlock();
Foo::sfoo(f1);
f1->getMu()->Unlock();
}
Mutex* getFooMu(Foo* f) LOCK_RETURNED(Foo::getMu(f));
class Bar : public Foo {
public:
int b GUARDED_BY(getMu());
void bar() EXCLUSIVE_LOCKS_REQUIRED(getMu());
void bar2(Bar* g) EXCLUSIVE_LOCKS_REQUIRED(getMu(this), g->getMu());
static void sbar(Bar* g) EXCLUSIVE_LOCKS_REQUIRED(g->getMu());
static void sbar2(Bar* g) EXCLUSIVE_LOCKS_REQUIRED(getFooMu(g));
};
// Use getMu() within other attributes.
// This requires at lest levels of substitution, more in the case of
void test2(Bar* b1, Bar* b2) {
b1->b = 0; // expected-warning {{writing variable 'b' requires holding mutex 'b1->mu_' exclusively}}
b1->bar(); // expected-warning {{calling function 'bar' requires holding mutex 'b1->mu_' exclusively}}
b1->bar2(b2); // expected-warning {{calling function 'bar2' requires holding mutex 'b1->mu_' exclusively}} \
// expected-warning {{calling function 'bar2' requires holding mutex 'b2->mu_' exclusively}}
Bar::sbar(b1); // expected-warning {{calling function 'sbar' requires holding mutex 'b1->mu_' exclusively}}
Bar::sbar2(b1); // expected-warning {{calling function 'sbar2' requires holding mutex 'b1->mu_' exclusively}}
b1->getMu()->Lock();
b1->b = 0;
b1->bar();
b1->bar2(b2); // \
// expected-warning {{calling function 'bar2' requires holding mutex 'b2->mu_' exclusively}} \
// // expected-note {{found near match 'b1->mu_'}}
b2->getMu()->Lock();
b1->bar2(b2);
b2->getMu()->Unlock();
Bar::sbar(b1);
Bar::sbar2(b1);
b1->getMu()->Unlock();
}
// Sanity check -- lock the mutex directly, but use attributes that call getMu()
// Also lock the mutex using getFooMu, which calls a lock_returned function.
void test3(Bar* b1, Bar* b2) {
b1->mu_.Lock();
b1->b = 0;
b1->bar();
getFooMu(b2)->Lock();
b1->bar2(b2);
getFooMu(b2)->Unlock();
Bar::sbar(b1);
Bar::sbar2(b1);
b1->mu_.Unlock();
}
} // end namespace LockReturned
namespace ReleasableScopedLock {
class Foo {
Mutex mu_;
bool c;
int a GUARDED_BY(mu_);
void test1();
void test2();
void test3();
void test4();
void test5();
};
void Foo::test1() {
ReleasableMutexLock rlock(&mu_);
rlock.Release();
}
void Foo::test2() {
ReleasableMutexLock rlock(&mu_);
if (c) { // test join point -- held/not held during release
rlock.Release();
}
}
void Foo::test3() {
ReleasableMutexLock rlock(&mu_);
a = 0;
rlock.Release();
a = 1; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
}
void Foo::test4() {
ReleasableMutexLock rlock(&mu_);
rlock.Release();
rlock.Release(); // expected-warning {{releasing mutex 'mu_' that was not held}}
}
void Foo::test5() {
ReleasableMutexLock rlock(&mu_);
if (c) {
rlock.Release();
}
// no warning on join point for managed lock.
rlock.Release(); // expected-warning {{releasing mutex 'mu_' that was not held}}
}
} // end namespace ReleasableScopedLock
namespace TrylockFunctionTest {
class Foo {
public:
Mutex mu1_;
Mutex mu2_;
bool c;
bool lockBoth() EXCLUSIVE_TRYLOCK_FUNCTION(true, mu1_, mu2_);
};
bool Foo::lockBoth() {
if (!mu1_.TryLock())
return false;
mu2_.Lock();
if (!c) {
mu1_.Unlock();
mu2_.Unlock();
return false;
}
return true;
}
} // end namespace TrylockFunctionTest
namespace DoubleLockBug {
class Foo {
public:
Mutex mu_;
int a GUARDED_BY(mu_);
void foo1() EXCLUSIVE_LOCKS_REQUIRED(mu_);
int foo2() SHARED_LOCKS_REQUIRED(mu_);
};
void Foo::foo1() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
a = 0;
}
int Foo::foo2() SHARED_LOCKS_REQUIRED(mu_) {
return a;
}
}
namespace UnlockBug {
class Foo {
public:
Mutex mutex_;
void foo1() EXCLUSIVE_LOCKS_REQUIRED(mutex_) { // expected-note {{mutex acquired here}}
mutex_.Unlock();
} // expected-warning {{expecting mutex 'mutex_' to be held at the end of function}}
void foo2() SHARED_LOCKS_REQUIRED(mutex_) { // expected-note {{mutex acquired here}}
mutex_.Unlock();
} // expected-warning {{expecting mutex 'mutex_' to be held at the end of function}}
};
} // end namespace UnlockBug
namespace FoolishScopedLockableBug {
class SCOPED_LOCKABLE WTF_ScopedLockable {
public:
WTF_ScopedLockable(Mutex* mu) EXCLUSIVE_LOCK_FUNCTION(mu);
// have to call release() manually;
~WTF_ScopedLockable();
void release() UNLOCK_FUNCTION();
};
class Foo {
Mutex mu_;
int a GUARDED_BY(mu_);
bool c;
void doSomething();
void test1() {
WTF_ScopedLockable wtf(&mu_);
wtf.release();
}
void test2() {
WTF_ScopedLockable wtf(&mu_); // expected-note {{mutex acquired here}}
} // expected-warning {{mutex 'mu_' is still held at the end of function}}
void test3() {
if (c) {
WTF_ScopedLockable wtf(&mu_);
wtf.release();
}
}
void test4() {
if (c) {
doSomething();
}
else {
WTF_ScopedLockable wtf(&mu_);
wtf.release();
}
}
void test5() {
if (c) {
WTF_ScopedLockable wtf(&mu_); // expected-note {{mutex acquired here}}
}
} // expected-warning {{mutex 'mu_' is not held on every path through here}}
void test6() {
if (c) {
doSomething();
}
else {
WTF_ScopedLockable wtf(&mu_); // expected-note {{mutex acquired here}}
}
} // expected-warning {{mutex 'mu_' is not held on every path through here}}
};
} // end namespace FoolishScopedLockableBug
namespace TemporaryCleanupExpr {
class Foo {
int a GUARDED_BY(getMutexPtr().get());
SmartPtr<Mutex> getMutexPtr();
void test();
};
void Foo::test() {
{
ReaderMutexLock lock(getMutexPtr().get());
int b = a;
}
int b = a; // expected-warning {{reading variable 'a' requires holding mutex 'getMutexPtr()'}}
}
} // end namespace TemporaryCleanupExpr
namespace SmartPointerTests {
class Foo {
public:
SmartPtr<Mutex> mu_;
int a GUARDED_BY(mu_);
int b GUARDED_BY(mu_.get());
int c GUARDED_BY(*mu_);
void Lock() EXCLUSIVE_LOCK_FUNCTION(mu_);
void Unlock() UNLOCK_FUNCTION(mu_);
void test0();
void test1();
void test2();
void test3();
void test4();
void test5();
void test6();
void test7();
void test8();
};
void Foo::test0() {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
b = 0; // expected-warning {{writing variable 'b' requires holding mutex 'mu_' exclusively}}
c = 0; // expected-warning {{writing variable 'c' requires holding mutex 'mu_' exclusively}}
}
void Foo::test1() {
mu_->Lock();
a = 0;
b = 0;
c = 0;
mu_->Unlock();
}
void Foo::test2() {
(*mu_).Lock();
a = 0;
b = 0;
c = 0;
(*mu_).Unlock();
}
void Foo::test3() {
mu_.get()->Lock();
a = 0;
b = 0;
c = 0;
mu_.get()->Unlock();
}
void Foo::test4() {
MutexLock lock(mu_.get());
a = 0;
b = 0;
c = 0;
}
void Foo::test5() {
MutexLock lock(&(*mu_));
a = 0;
b = 0;
c = 0;
}
void Foo::test6() {
Lock();
a = 0;
b = 0;
c = 0;
Unlock();
}
void Foo::test7() {
{
Lock();
mu_->Unlock();
}
{
mu_->Lock();
Unlock();
}
{
mu_.get()->Lock();
mu_->Unlock();
}
{
mu_->Lock();
mu_.get()->Unlock();
}
{
mu_.get()->Lock();
(*mu_).Unlock();
}
{
(*mu_).Lock();
mu_->Unlock();
}
}
void Foo::test8() {
mu_->Lock();
mu_.get()->Lock(); // expected-warning {{acquiring mutex 'mu_' that is already held}}
(*mu_).Lock(); // expected-warning {{acquiring mutex 'mu_' that is already held}}
mu_.get()->Unlock();
Unlock(); // expected-warning {{releasing mutex 'mu_' that was not held}}
}
class Bar {
SmartPtr<Foo> foo;
void test0();
void test1();
void test2();
void test3();
};
void Bar::test0() {
foo->a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'foo->mu_' exclusively}}
(*foo).b = 0; // expected-warning {{writing variable 'b' requires holding mutex 'foo->mu_' exclusively}}
foo.get()->c = 0; // expected-warning {{writing variable 'c' requires holding mutex 'foo->mu_' exclusively}}
}
void Bar::test1() {
foo->mu_->Lock();
foo->a = 0;
(*foo).b = 0;
foo.get()->c = 0;
foo->mu_->Unlock();
}
void Bar::test2() {
(*foo).mu_->Lock();
foo->a = 0;
(*foo).b = 0;
foo.get()->c = 0;
foo.get()->mu_->Unlock();
}
void Bar::test3() {
MutexLock lock(foo->mu_.get());
foo->a = 0;
(*foo).b = 0;
foo.get()->c = 0;
}
} // end namespace SmartPointerTests
namespace DuplicateAttributeTest {
class LOCKABLE Foo {
public:
Mutex mu1_;
Mutex mu2_;
Mutex mu3_;
int a GUARDED_BY(mu1_);
int b GUARDED_BY(mu2_);
int c GUARDED_BY(mu3_);
void lock() EXCLUSIVE_LOCK_FUNCTION();
void unlock() UNLOCK_FUNCTION();
void lock1() EXCLUSIVE_LOCK_FUNCTION(mu1_);
void slock1() SHARED_LOCK_FUNCTION(mu1_);
void lock3() EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_, mu3_);
void locklots()
EXCLUSIVE_LOCK_FUNCTION(mu1_)
EXCLUSIVE_LOCK_FUNCTION(mu2_)
EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_, mu3_);
void unlock1() UNLOCK_FUNCTION(mu1_);
void unlock3() UNLOCK_FUNCTION(mu1_, mu2_, mu3_);
void unlocklots()
UNLOCK_FUNCTION(mu1_)
UNLOCK_FUNCTION(mu2_)
UNLOCK_FUNCTION(mu1_, mu2_, mu3_);
};
void Foo::lock() EXCLUSIVE_LOCK_FUNCTION() { }
void Foo::unlock() UNLOCK_FUNCTION() { }
void Foo::lock1() EXCLUSIVE_LOCK_FUNCTION(mu1_) {
mu1_.Lock();
}
void Foo::slock1() SHARED_LOCK_FUNCTION(mu1_) {
mu1_.ReaderLock();
}
void Foo::lock3() EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_, mu3_) {
mu1_.Lock();
mu2_.Lock();
mu3_.Lock();
}
void Foo::locklots()
EXCLUSIVE_LOCK_FUNCTION(mu1_, mu2_)
EXCLUSIVE_LOCK_FUNCTION(mu2_, mu3_) {
mu1_.Lock();
mu2_.Lock();
mu3_.Lock();
}
void Foo::unlock1() UNLOCK_FUNCTION(mu1_) {
mu1_.Unlock();
}
void Foo::unlock3() UNLOCK_FUNCTION(mu1_, mu2_, mu3_) {
mu1_.Unlock();
mu2_.Unlock();
mu3_.Unlock();
}
void Foo::unlocklots()
UNLOCK_FUNCTION(mu1_, mu2_)
UNLOCK_FUNCTION(mu2_, mu3_) {
mu1_.Unlock();
mu2_.Unlock();
mu3_.Unlock();
}
void test0() {
Foo foo;
foo.lock();
foo.unlock();
foo.lock();
foo.lock(); // expected-warning {{acquiring mutex 'foo' that is already held}}
foo.unlock();
foo.unlock(); // expected-warning {{releasing mutex 'foo' that was not held}}
}
void test1() {
Foo foo;
foo.lock1();
foo.a = 0;
foo.unlock1();
foo.lock1();
foo.lock1(); // expected-warning {{acquiring mutex 'foo.mu1_' that is already held}}
foo.a = 0;
foo.unlock1();
foo.unlock1(); // expected-warning {{releasing mutex 'foo.mu1_' that was not held}}
}
int test2() {
Foo foo;
foo.slock1();
int d1 = foo.a;
foo.unlock1();
foo.slock1();
foo.slock1(); // expected-warning {{acquiring mutex 'foo.mu1_' that is already held}}
int d2 = foo.a;
foo.unlock1();
foo.unlock1(); // expected-warning {{releasing mutex 'foo.mu1_' that was not held}}
return d1 + d2;
}
void test3() {
Foo foo;
foo.lock3();
foo.a = 0;
foo.b = 0;
foo.c = 0;
foo.unlock3();
foo.lock3();
foo.lock3(); // \
// expected-warning {{acquiring mutex 'foo.mu1_' that is already held}} \
// expected-warning {{acquiring mutex 'foo.mu2_' that is already held}} \
// expected-warning {{acquiring mutex 'foo.mu3_' that is already held}}
foo.a = 0;
foo.b = 0;
foo.c = 0;
foo.unlock3();
foo.unlock3(); // \
// expected-warning {{releasing mutex 'foo.mu1_' that was not held}} \
// expected-warning {{releasing mutex 'foo.mu2_' that was not held}} \
// expected-warning {{releasing mutex 'foo.mu3_' that was not held}}
}
void testlots() {
Foo foo;
foo.locklots();
foo.a = 0;
foo.b = 0;
foo.c = 0;
foo.unlocklots();
foo.locklots();
foo.locklots(); // \
// expected-warning {{acquiring mutex 'foo.mu1_' that is already held}} \
// expected-warning {{acquiring mutex 'foo.mu2_' that is already held}} \
// expected-warning {{acquiring mutex 'foo.mu3_' that is already held}}
foo.a = 0;
foo.b = 0;
foo.c = 0;
foo.unlocklots();
foo.unlocklots(); // \
// expected-warning {{releasing mutex 'foo.mu1_' that was not held}} \
// expected-warning {{releasing mutex 'foo.mu2_' that was not held}} \
// expected-warning {{releasing mutex 'foo.mu3_' that was not held}}
}
} // end namespace DuplicateAttributeTest
namespace TryLockEqTest {
class Foo {
Mutex mu_;
int a GUARDED_BY(mu_);
bool c;
int tryLockMutexI() EXCLUSIVE_TRYLOCK_FUNCTION(1, mu_);
Mutex* tryLockMutexP() EXCLUSIVE_TRYLOCK_FUNCTION(1, mu_);
void unlock() UNLOCK_FUNCTION(mu_);
void test1();
void test2();
};
void Foo::test1() {
if (tryLockMutexP() == 0) {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
return;
}
a = 0;
unlock();
if (tryLockMutexP() != 0) {
a = 0;
unlock();
}
if (0 != tryLockMutexP()) {
a = 0;
unlock();
}
if (!(tryLockMutexP() == 0)) {
a = 0;
unlock();
}
if (tryLockMutexI() == 0) {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
return;
}
a = 0;
unlock();
if (0 == tryLockMutexI()) {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
return;
}
a = 0;
unlock();
if (tryLockMutexI() == 1) {
a = 0;
unlock();
}
if (mu_.TryLock() == false) {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
return;
}
a = 0;
unlock();
if (mu_.TryLock() == true) {
a = 0;
unlock();
}
else {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
}
#if __has_feature(cxx_nullptr)
if (tryLockMutexP() == nullptr) {
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
return;
}
a = 0;
unlock();
#endif
}
} // end namespace TryLockEqTest
namespace ExistentialPatternMatching {
class Graph {
public:
Mutex mu_;
};
void LockAllGraphs() EXCLUSIVE_LOCK_FUNCTION(&Graph::mu_);
void UnlockAllGraphs() UNLOCK_FUNCTION(&Graph::mu_);
class Node {
public:
int a GUARDED_BY(&Graph::mu_);
void foo() EXCLUSIVE_LOCKS_REQUIRED(&Graph::mu_) {
a = 0;
}
void foo2() LOCKS_EXCLUDED(&Graph::mu_);
};
void test() {
Graph g1;
Graph g2;
Node n1;
n1.a = 0; // expected-warning {{writing variable 'a' requires holding mutex '&ExistentialPatternMatching::Graph::mu_' exclusively}}
n1.foo(); // expected-warning {{calling function 'foo' requires holding mutex '&ExistentialPatternMatching::Graph::mu_' exclusively}}
n1.foo2();
g1.mu_.Lock();
n1.a = 0;
n1.foo();
n1.foo2(); // expected-warning {{cannot call function 'foo2' while mutex '&ExistentialPatternMatching::Graph::mu_' is held}}
g1.mu_.Unlock();
g2.mu_.Lock();
n1.a = 0;
n1.foo();
n1.foo2(); // expected-warning {{cannot call function 'foo2' while mutex '&ExistentialPatternMatching::Graph::mu_' is held}}
g2.mu_.Unlock();
LockAllGraphs();
n1.a = 0;
n1.foo();
n1.foo2(); // expected-warning {{cannot call function 'foo2' while mutex '&ExistentialPatternMatching::Graph::mu_' is held}}
UnlockAllGraphs();
LockAllGraphs();
g1.mu_.Unlock();
LockAllGraphs();
g2.mu_.Unlock();
LockAllGraphs();
g1.mu_.Lock(); // expected-warning {{acquiring mutex 'g1.mu_' that is already held}}
g1.mu_.Unlock();
}
} // end namespace ExistentialPatternMatching
namespace StringIgnoreTest {
class Foo {
public:
Mutex mu_;
void lock() EXCLUSIVE_LOCK_FUNCTION("");
void unlock() UNLOCK_FUNCTION("");
void goober() EXCLUSIVE_LOCKS_REQUIRED("");
void roober() SHARED_LOCKS_REQUIRED("");
};
class Bar : public Foo {
public:
void bar(Foo* f) {
f->unlock();
f->goober();
f->roober();
f->lock();
};
};
} // end namespace StringIgnoreTest
namespace LockReturnedScopeFix {
class Base {
protected:
struct Inner;
bool c;
const Mutex& getLock(const Inner* i);
void lockInner (Inner* i) EXCLUSIVE_LOCK_FUNCTION(getLock(i));
void unlockInner(Inner* i) UNLOCK_FUNCTION(getLock(i));
void foo(Inner* i) EXCLUSIVE_LOCKS_REQUIRED(getLock(i));
void bar(Inner* i);
};
struct Base::Inner {
Mutex lock_;
void doSomething() EXCLUSIVE_LOCKS_REQUIRED(lock_);
};
const Mutex& Base::getLock(const Inner* i) LOCK_RETURNED(i->lock_) {
return i->lock_;
}
void Base::foo(Inner* i) {
i->doSomething();
}
void Base::bar(Inner* i) {
if (c) {
i->lock_.Lock();
unlockInner(i);
}
else {
lockInner(i);
i->lock_.Unlock();
}
}
} // end namespace LockReturnedScopeFix
namespace TrylockWithCleanups {
struct Foo {
Mutex mu_;
int a GUARDED_BY(mu_);
};
Foo* GetAndLockFoo(const MyString& s)
EXCLUSIVE_TRYLOCK_FUNCTION(true, &Foo::mu_);
static void test() {
Foo* lt = GetAndLockFoo("foo");
if (!lt) return;
int a = lt->a;
lt->mu_.Unlock();
}
} // end namespace TrylockWithCleanups
namespace UniversalLock {
class Foo {
Mutex mu_;
bool c;
int a GUARDED_BY(mu_);
void r_foo() SHARED_LOCKS_REQUIRED(mu_);
void w_foo() EXCLUSIVE_LOCKS_REQUIRED(mu_);
void test1() {
int b;
beginNoWarnOnReads();
b = a;
r_foo();
endNoWarnOnReads();
beginNoWarnOnWrites();
a = 0;
w_foo();
endNoWarnOnWrites();
}
// don't warn on joins with universal lock
void test2() {
if (c) {
beginNoWarnOnWrites();
}
a = 0; // \
// expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
endNoWarnOnWrites(); // \
// expected-warning {{releasing mutex '*' that was not held}}
}
// make sure the universal lock joins properly
void test3() {
if (c) {
mu_.Lock();
beginNoWarnOnWrites();
}
else {
beginNoWarnOnWrites();
mu_.Lock();
}
a = 0;
endNoWarnOnWrites();
mu_.Unlock();
}
// combine universal lock with other locks
void test4() {
beginNoWarnOnWrites();
mu_.Lock();
mu_.Unlock();
endNoWarnOnWrites();
mu_.Lock();
beginNoWarnOnWrites();
endNoWarnOnWrites();
mu_.Unlock();
mu_.Lock();
beginNoWarnOnWrites();
mu_.Unlock();
endNoWarnOnWrites();
}
};
} // end namespace UniversalLock
namespace TemplateLockReturned {
template<class T>
class BaseT {
public:
virtual void baseMethod() = 0;
Mutex* get_mutex() LOCK_RETURNED(mutex_) { return &mutex_; }
Mutex mutex_;
int a GUARDED_BY(mutex_);
};
class Derived : public BaseT<int> {
public:
void baseMethod() EXCLUSIVE_LOCKS_REQUIRED(get_mutex()) {
a = 0;
}
};
} // end namespace TemplateLockReturned
namespace ExprMatchingBugFix {
class Foo {
public:
Mutex mu_;
};
class Bar {
public:
bool c;
Foo* foo;
Bar(Foo* f) : foo(f) { }
struct Nested {
Foo* foo;
Nested(Foo* f) : foo(f) { }
void unlockFoo() UNLOCK_FUNCTION(&Foo::mu_);
};
void test();
};
void Bar::test() {
foo->mu_.Lock();
if (c) {
Nested *n = new Nested(foo);
n->unlockFoo();
}
else {
foo->mu_.Unlock();
}
}
}; // end namespace ExprMatchingBugfix
namespace ComplexNameTest {
class Foo {
public:
static Mutex mu_;
Foo() EXCLUSIVE_LOCKS_REQUIRED(mu_) { }
~Foo() EXCLUSIVE_LOCKS_REQUIRED(mu_) { }
int operator[](int i) EXCLUSIVE_LOCKS_REQUIRED(mu_) { return 0; }
};
class Bar {
public:
static Mutex mu_;
Bar() LOCKS_EXCLUDED(mu_) { }
~Bar() LOCKS_EXCLUDED(mu_) { }
int operator[](int i) LOCKS_EXCLUDED(mu_) { return 0; }
};
void test1() {
Foo f; // expected-warning {{calling function 'Foo' requires holding mutex 'mu_' exclusively}}
int a = f[0]; // expected-warning {{calling function 'operator[]' requires holding mutex 'mu_' exclusively}}
} // expected-warning {{calling function '~Foo' requires holding mutex 'mu_' exclusively}}
void test2() {
Bar::mu_.Lock();
{
Bar b; // expected-warning {{cannot call function 'Bar' while mutex 'mu_' is held}}
int a = b[0]; // expected-warning {{cannot call function 'operator[]' while mutex 'mu_' is held}}
} // expected-warning {{cannot call function '~Bar' while mutex 'mu_' is held}}
Bar::mu_.Unlock();
}
}; // end namespace ComplexNameTest
namespace UnreachableExitTest {
class FemmeFatale {
public:
FemmeFatale();
~FemmeFatale() __attribute__((noreturn));
};
void exitNow() __attribute__((noreturn));
void exitDestruct(const MyString& ms) __attribute__((noreturn));
Mutex fatalmu_;
void test1() EXCLUSIVE_LOCKS_REQUIRED(fatalmu_) {
exitNow();
}
void test2() EXCLUSIVE_LOCKS_REQUIRED(fatalmu_) {
FemmeFatale femme;
}
bool c;
void test3() EXCLUSIVE_LOCKS_REQUIRED(fatalmu_) {
if (c) {
exitNow();
}
else {
FemmeFatale femme;
}
}
void test4() EXCLUSIVE_LOCKS_REQUIRED(fatalmu_) {
exitDestruct("foo");
}
} // end namespace UnreachableExitTest
namespace VirtualMethodCanonicalizationTest {
class Base {
public:
virtual Mutex* getMutex() = 0;
};
class Base2 : public Base {
public:
Mutex* getMutex();
};
class Base3 : public Base2 {
public:
Mutex* getMutex();
};
class Derived : public Base3 {
public:
Mutex* getMutex(); // overrides Base::getMutex()
};
void baseFun(Base *b) EXCLUSIVE_LOCKS_REQUIRED(b->getMutex()) { }
void derivedFun(Derived *d) EXCLUSIVE_LOCKS_REQUIRED(d->getMutex()) {
baseFun(d);
}
} // end namespace VirtualMethodCanonicalizationTest
namespace TemplateFunctionParamRemapTest {
template <class T>
struct Cell {
T dummy_;
Mutex* mu_;
};
class Foo {
public:
template <class T>
void elr(Cell<T>* c) __attribute__((exclusive_locks_required(c->mu_)));
void test();
};
template<class T>
void Foo::elr(Cell<T>* c1) { }
void Foo::test() {
Cell<int> cell;
elr(&cell); // \
// expected-warning {{calling function 'elr' requires holding mutex 'cell.mu_' exclusively}}
}
template<class T>
void globalELR(Cell<T>* c) __attribute__((exclusive_locks_required(c->mu_)));
template<class T>
void globalELR(Cell<T>* c1) { }
void globalTest() {
Cell<int> cell;
globalELR(&cell); // \
// expected-warning {{calling function 'globalELR' requires holding mutex 'cell.mu_' exclusively}}
}
template<class T>
void globalELR2(Cell<T>* c) __attribute__((exclusive_locks_required(c->mu_)));
// second declaration
template<class T>
void globalELR2(Cell<T>* c2);
template<class T>
void globalELR2(Cell<T>* c3) { }
// re-declaration after definition
template<class T>
void globalELR2(Cell<T>* c4);
void globalTest2() {
Cell<int> cell;
globalELR2(&cell); // \
// expected-warning {{calling function 'globalELR2' requires holding mutex 'cell.mu_' exclusively}}
}
template<class T>
class FooT {
public:
void elr(Cell<T>* c) __attribute__((exclusive_locks_required(c->mu_)));
};
template<class T>
void FooT<T>::elr(Cell<T>* c1) { }
void testFooT() {
Cell<int> cell;
FooT<int> foo;
foo.elr(&cell); // \
// expected-warning {{calling function 'elr' requires holding mutex 'cell.mu_' exclusively}}
}
} // end namespace TemplateFunctionParamRemapTest
namespace SelfConstructorTest {
class SelfLock {
public:
SelfLock() EXCLUSIVE_LOCK_FUNCTION(mu_);
~SelfLock() UNLOCK_FUNCTION(mu_);
void foo() EXCLUSIVE_LOCKS_REQUIRED(mu_);
Mutex mu_;
};
class LOCKABLE SelfLock2 {
public:
SelfLock2() EXCLUSIVE_LOCK_FUNCTION();
~SelfLock2() UNLOCK_FUNCTION();
void foo() EXCLUSIVE_LOCKS_REQUIRED(this);
};
void test() {
SelfLock s;
s.foo();
}
void test2() {
SelfLock2 s2;
s2.foo();
}
} // end namespace SelfConstructorTest
namespace MultipleAttributeTest {
class Foo {
Mutex mu1_;
Mutex mu2_;
int a GUARDED_BY(mu1_);
int b GUARDED_BY(mu2_);
int c GUARDED_BY(mu1_) GUARDED_BY(mu2_);
int* d PT_GUARDED_BY(mu1_) PT_GUARDED_BY(mu2_);
void foo1() EXCLUSIVE_LOCKS_REQUIRED(mu1_)
EXCLUSIVE_LOCKS_REQUIRED(mu2_);
void foo2() SHARED_LOCKS_REQUIRED(mu1_)
SHARED_LOCKS_REQUIRED(mu2_);
void foo3() LOCKS_EXCLUDED(mu1_)
LOCKS_EXCLUDED(mu2_);
void lock() EXCLUSIVE_LOCK_FUNCTION(mu1_)
EXCLUSIVE_LOCK_FUNCTION(mu2_);
void readerlock() SHARED_LOCK_FUNCTION(mu1_)
SHARED_LOCK_FUNCTION(mu2_);
void unlock() UNLOCK_FUNCTION(mu1_)
UNLOCK_FUNCTION(mu2_);
bool trylock() EXCLUSIVE_TRYLOCK_FUNCTION(true, mu1_)
EXCLUSIVE_TRYLOCK_FUNCTION(true, mu2_);
bool readertrylock() SHARED_TRYLOCK_FUNCTION(true, mu1_)
SHARED_TRYLOCK_FUNCTION(true, mu2_);
void assertBoth() ASSERT_EXCLUSIVE_LOCK(mu1_)
ASSERT_EXCLUSIVE_LOCK(mu2_);
void assertShared() ASSERT_SHARED_LOCK(mu1_)
ASSERT_SHARED_LOCK(mu2_);
void test();
void testAssert();
void testAssertShared();
};
void Foo::foo1() {
a = 1;
b = 2;
}
void Foo::foo2() {
int result = a + b;
}
void Foo::foo3() { }
void Foo::lock() { mu1_.Lock(); mu2_.Lock(); }
void Foo::readerlock() { mu1_.ReaderLock(); mu2_.ReaderLock(); }
void Foo::unlock() { mu1_.Unlock(); mu2_.Unlock(); }
bool Foo::trylock() { return true; }
bool Foo::readertrylock() { return true; }
void Foo::test() {
mu1_.Lock();
foo1(); // expected-warning {{}}
c = 0; // expected-warning {{}}
*d = 0; // expected-warning {{}}
mu1_.Unlock();
mu1_.ReaderLock();
foo2(); // expected-warning {{}}
int x = c; // expected-warning {{}}
int y = *d; // expected-warning {{}}
mu1_.Unlock();
mu2_.Lock();
foo3(); // expected-warning {{}}
mu2_.Unlock();
lock();
a = 0;
b = 0;
unlock();
readerlock();
int z = a + b;
unlock();
if (trylock()) {
a = 0;
b = 0;
unlock();
}
if (readertrylock()) {
int zz = a + b;
unlock();
}
}
// Force duplication of attributes
void Foo::assertBoth() { }
void Foo::assertShared() { }
void Foo::testAssert() {
assertBoth();
a = 0;
b = 0;
}
void Foo::testAssertShared() {
assertShared();
int zz = a + b;
}
} // end namespace MultipleAttributeTest
namespace GuardedNonPrimitiveTypeTest {
class Data {
public:
Data(int i) : dat(i) { }
int getValue() const { return dat; }
void setValue(int i) { dat = i; }
int operator[](int i) const { return dat; }
int& operator[](int i) { return dat; }
void operator()() { }
private:
int dat;
};
class DataCell {
public:
DataCell(const Data& d) : dat(d) { }
private:
Data dat;
};
void showDataCell(const DataCell& dc);
class Foo {
public:
// method call tests
void test() {
data_.setValue(0); // FIXME -- should be writing \
// expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
int a = data_.getValue(); // \
// expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
datap1_->setValue(0); // FIXME -- should be writing \
// expected-warning {{reading variable 'datap1_' requires holding mutex 'mu_'}}
a = datap1_->getValue(); // \
// expected-warning {{reading variable 'datap1_' requires holding mutex 'mu_'}}
datap2_->setValue(0); // FIXME -- should be writing \
// expected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
a = datap2_->getValue(); // \
// expected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
(*datap2_).setValue(0); // FIXME -- should be writing \
// expected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
a = (*datap2_).getValue(); // \
// expected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
mu_.Lock();
data_.setValue(1);
datap1_->setValue(1);
datap2_->setValue(1);
mu_.Unlock();
mu_.ReaderLock();
a = data_.getValue();
datap1_->setValue(0); // reads datap1_, writes *datap1_
a = datap1_->getValue();
a = datap2_->getValue();
mu_.Unlock();
}
// operator tests
void test2() {
data_ = Data(1); // expected-warning {{writing variable 'data_' requires holding mutex 'mu_' exclusively}}
*datap1_ = data_; // expected-warning {{reading variable 'datap1_' requires holding mutex 'mu_'}} \
// expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
*datap2_ = data_; // expected-warning {{writing the value pointed to by 'datap2_' requires holding mutex 'mu_' exclusively}} \
// expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
data_ = *datap1_; // expected-warning {{writing variable 'data_' requires holding mutex 'mu_' exclusively}} \
// expected-warning {{reading variable 'datap1_' requires holding mutex 'mu_'}}
data_ = *datap2_; // expected-warning {{writing variable 'data_' requires holding mutex 'mu_' exclusively}} \
// expected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
data_[0] = 0; // expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
(*datap2_)[0] = 0; // expected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
data_(); // expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
}
// const operator tests
void test3() const {
Data mydat(data_); // expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
//FIXME
//showDataCell(data_); // xpected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
//showDataCell(*datap2_); // xpected-warning {{reading the value pointed to by 'datap2_' requires holding mutex 'mu_'}}
int a = data_[0]; // expected-warning {{reading variable 'data_' requires holding mutex 'mu_'}}
}
private:
Mutex mu_;
Data data_ GUARDED_BY(mu_);
Data* datap1_ GUARDED_BY(mu_);
Data* datap2_ PT_GUARDED_BY(mu_);
};
} // end namespace GuardedNonPrimitiveTypeTest
namespace GuardedNonPrimitive_MemberAccess {
class Cell {
public:
Cell(int i);
void cellMethod();
int a;
};
class Foo {
public:
int a;
Cell c GUARDED_BY(cell_mu_);
Cell* cp PT_GUARDED_BY(cell_mu_);
void myMethod();
Mutex cell_mu_;
};
class Bar {
private:
Mutex mu_;
Foo foo GUARDED_BY(mu_);
Foo* foop PT_GUARDED_BY(mu_);
void test() {
foo.myMethod(); // expected-warning {{reading variable 'foo' requires holding mutex 'mu_'}}
int fa = foo.a; // expected-warning {{reading variable 'foo' requires holding mutex 'mu_'}}
foo.a = fa; // expected-warning {{writing variable 'foo' requires holding mutex 'mu_' exclusively}}
fa = foop->a; // expected-warning {{reading the value pointed to by 'foop' requires holding mutex 'mu_'}}
foop->a = fa; // expected-warning {{writing the value pointed to by 'foop' requires holding mutex 'mu_' exclusively}}
fa = (*foop).a; // expected-warning {{reading the value pointed to by 'foop' requires holding mutex 'mu_'}}
(*foop).a = fa; // expected-warning {{writing the value pointed to by 'foop' requires holding mutex 'mu_' exclusively}}
foo.c = Cell(0); // expected-warning {{writing variable 'foo' requires holding mutex 'mu_'}} \
// expected-warning {{writing variable 'c' requires holding mutex 'foo.cell_mu_' exclusively}}
foo.c.cellMethod(); // expected-warning {{reading variable 'foo' requires holding mutex 'mu_'}} \
// expected-warning {{reading variable 'c' requires holding mutex 'foo.cell_mu_'}}
foop->c = Cell(0); // expected-warning {{writing the value pointed to by 'foop' requires holding mutex 'mu_'}} \
// expected-warning {{writing variable 'c' requires holding mutex 'foop->cell_mu_' exclusively}}
foop->c.cellMethod(); // expected-warning {{reading the value pointed to by 'foop' requires holding mutex 'mu_'}} \
// expected-warning {{reading variable 'c' requires holding mutex 'foop->cell_mu_'}}
(*foop).c = Cell(0); // expected-warning {{writing the value pointed to by 'foop' requires holding mutex 'mu_'}} \
// expected-warning {{writing variable 'c' requires holding mutex 'foop->cell_mu_' exclusively}}
(*foop).c.cellMethod(); // expected-warning {{reading the value pointed to by 'foop' requires holding mutex 'mu_'}} \
// expected-warning {{reading variable 'c' requires holding mutex 'foop->cell_mu_'}}
};
};
} // namespace GuardedNonPrimitive_MemberAccess
namespace TestThrowExpr {
class Foo {
Mutex mu_;
bool hasError();
void test() {
mu_.Lock();
if (hasError()) {
throw "ugly";
}
mu_.Unlock();
}
};
} // end namespace TestThrowExpr
namespace UnevaluatedContextTest {
// parse attribute expressions in an unevaluated context.
static inline Mutex* getMutex1();
static inline Mutex* getMutex2();
void bar() EXCLUSIVE_LOCKS_REQUIRED(getMutex1());
void bar2() EXCLUSIVE_LOCKS_REQUIRED(getMutex1(), getMutex2());
} // end namespace UnevaluatedContextTest
namespace LockUnlockFunctionTest {
// Check built-in lock functions
class LOCKABLE MyLockable {
public:
void lock() EXCLUSIVE_LOCK_FUNCTION() { mu_.Lock(); }
void readerLock() SHARED_LOCK_FUNCTION() { mu_.ReaderLock(); }
void unlock() UNLOCK_FUNCTION() { mu_.Unlock(); }
private:
Mutex mu_;
};
class Foo {
public:
// Correct lock/unlock functions
void lock() EXCLUSIVE_LOCK_FUNCTION(mu_) {
mu_.Lock();
}
void readerLock() SHARED_LOCK_FUNCTION(mu_) {
mu_.ReaderLock();
}
void unlock() UNLOCK_FUNCTION(mu_) {
mu_.Unlock();
}
// Check failure to lock.
void lockBad() EXCLUSIVE_LOCK_FUNCTION(mu_) { // expected-note {{mutex acquired here}}
mu2_.Lock();
mu2_.Unlock();
} // expected-warning {{expecting mutex 'mu_' to be held at the end of function}}
void readerLockBad() SHARED_LOCK_FUNCTION(mu_) { // expected-note {{mutex acquired here}}
mu2_.Lock();
mu2_.Unlock();
} // expected-warning {{expecting mutex 'mu_' to be held at the end of function}}
void unlockBad() UNLOCK_FUNCTION(mu_) { // expected-note {{mutex acquired here}}
mu2_.Lock();
mu2_.Unlock();
} // expected-warning {{mutex 'mu_' is still held at the end of function}}
// Check locking the wrong thing.
void lockBad2() EXCLUSIVE_LOCK_FUNCTION(mu_) { // expected-note {{mutex acquired here}}
mu2_.Lock(); // expected-note {{mutex acquired here}}
} // expected-warning {{expecting mutex 'mu_' to be held at the end of function}} \
// expected-warning {{mutex 'mu2_' is still held at the end of function}}
void readerLockBad2() SHARED_LOCK_FUNCTION(mu_) { // expected-note {{mutex acquired here}}
mu2_.ReaderLock(); // expected-note {{mutex acquired here}}
} // expected-warning {{expecting mutex 'mu_' to be held at the end of function}} \
// expected-warning {{mutex 'mu2_' is still held at the end of function}}
void unlockBad2() UNLOCK_FUNCTION(mu_) { // expected-note {{mutex acquired here}}
mu2_.Unlock(); // expected-warning {{releasing mutex 'mu2_' that was not held}}
} // expected-warning {{mutex 'mu_' is still held at the end of function}}
private:
Mutex mu_;
Mutex mu2_;
};
} // end namespace LockUnlockFunctionTest
namespace AssertHeldTest {
class Foo {
public:
int c;
int a GUARDED_BY(mu_);
Mutex mu_;
void test1() {
mu_.AssertHeld();
int b = a;
a = 0;
}
void test2() {
mu_.AssertReaderHeld();
int b = a;
a = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu_' exclusively}}
}
void test3() {
if (c) {
mu_.AssertHeld();
}
else {
mu_.AssertHeld();
}
int b = a;
a = 0;
}
void test4() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
mu_.AssertHeld();
int b = a;
a = 0;
}
void test5() UNLOCK_FUNCTION(mu_) {
mu_.AssertHeld();
mu_.Unlock();
}
void test6() {
mu_.AssertHeld();
mu_.Unlock();
} // should this be a warning?
void test7() {
if (c) {
mu_.AssertHeld();
}
else {
mu_.Lock();
}
int b = a;
a = 0;
mu_.Unlock();
}
void test8() {
if (c) {
mu_.Lock();
}
else {
mu_.AssertHeld();
}
int b = a;
a = 0;
mu_.Unlock();
}
void test9() {
if (c) {
mu_.AssertHeld();
}
else {
mu_.Lock(); // expected-note {{mutex acquired here}}
}
} // expected-warning {{mutex 'mu_' is still held at the end of function}}
void test10() {
if (c) {
mu_.Lock(); // expected-note {{mutex acquired here}}
}
else {
mu_.AssertHeld();
}
} // expected-warning {{mutex 'mu_' is still held at the end of function}}
void assertMu() ASSERT_EXCLUSIVE_LOCK(mu_);
void test11() {
assertMu();
int b = a;
a = 0;
}
};
} // end namespace AssertHeldTest
namespace LogicalConditionalTryLock {
class Foo {
public:
Mutex mu;
int a GUARDED_BY(mu);
bool c;
bool newc();
void test1() {
if (c && mu.TryLock()) {
a = 0;
mu.Unlock();
}
}
void test2() {
bool b = mu.TryLock();
if (c && b) {
a = 0;
mu.Unlock();
}
}
void test3() {
if (c || !mu.TryLock())
return;
a = 0;
mu.Unlock();
}
void test4() {
while (c && mu.TryLock()) {
a = 0;
c = newc();
mu.Unlock();
}
}
void test5() {
while (c) {
if (newc() || !mu.TryLock())
break;
a = 0;
mu.Unlock();
}
}
void test6() {
mu.Lock();
do {
a = 0;
mu.Unlock();
} while (newc() && mu.TryLock());
}
void test7() {
for (bool b = mu.TryLock(); c && b;) {
a = 0;
mu.Unlock();
}
}
void test8() {
if (c && newc() && mu.TryLock()) {
a = 0;
mu.Unlock();
}
}
void test9() {
if (!(c && newc() && mu.TryLock()))
return;
a = 0;
mu.Unlock();
}
void test10() {
if (!(c || !mu.TryLock())) {
a = 0;
mu.Unlock();
}
}
};
} // end namespace LogicalConditionalTryLock
namespace PtGuardedByTest {
void doSomething();
class Cell {
public:
int a;
};
// This mainly duplicates earlier tests, but just to make sure...
class PtGuardedBySanityTest {
Mutex mu1;
Mutex mu2;
int* a GUARDED_BY(mu1) PT_GUARDED_BY(mu2);
Cell* c GUARDED_BY(mu1) PT_GUARDED_BY(mu2);
int sa[10] GUARDED_BY(mu1);
Cell sc[10] GUARDED_BY(mu1);
void test1() {
mu1.Lock();
if (a == 0) doSomething(); // OK, we don't dereference.
a = 0;
c = 0;
if (sa[0] == 42) doSomething();
sa[0] = 57;
if (sc[0].a == 42) doSomething();
sc[0].a = 57;
mu1.Unlock();
}
void test2() {
mu1.ReaderLock();
if (*a == 0) doSomething(); // expected-warning {{reading the value pointed to by 'a' requires holding mutex 'mu2'}}
*a = 0; // expected-warning {{writing the value pointed to by 'a' requires holding mutex 'mu2' exclusively}}
if (c->a == 0) doSomething(); // expected-warning {{reading the value pointed to by 'c' requires holding mutex 'mu2'}}
c->a = 0; // expected-warning {{writing the value pointed to by 'c' requires holding mutex 'mu2' exclusively}}
if ((*c).a == 0) doSomething(); // expected-warning {{reading the value pointed to by 'c' requires holding mutex 'mu2'}}
(*c).a = 0; // expected-warning {{writing the value pointed to by 'c' requires holding mutex 'mu2' exclusively}}
if (a[0] == 42) doSomething(); // expected-warning {{reading the value pointed to by 'a' requires holding mutex 'mu2'}}
a[0] = 57; // expected-warning {{writing the value pointed to by 'a' requires holding mutex 'mu2' exclusively}}
if (c[0].a == 42) doSomething(); // expected-warning {{reading the value pointed to by 'c' requires holding mutex 'mu2'}}
c[0].a = 57; // expected-warning {{writing the value pointed to by 'c' requires holding mutex 'mu2' exclusively}}
mu1.Unlock();
}
void test3() {
mu2.Lock();
if (*a == 0) doSomething(); // expected-warning {{reading variable 'a' requires holding mutex 'mu1'}}
*a = 0; // expected-warning {{reading variable 'a' requires holding mutex 'mu1'}}
if (c->a == 0) doSomething(); // expected-warning {{reading variable 'c' requires holding mutex 'mu1'}}
c->a = 0; // expected-warning {{reading variable 'c' requires holding mutex 'mu1'}}
if ((*c).a == 0) doSomething(); // expected-warning {{reading variable 'c' requires holding mutex 'mu1'}}
(*c).a = 0; // expected-warning {{reading variable 'c' requires holding mutex 'mu1'}}
if (a[0] == 42) doSomething(); // expected-warning {{reading variable 'a' requires holding mutex 'mu1'}}
a[0] = 57; // expected-warning {{reading variable 'a' requires holding mutex 'mu1'}}
if (c[0].a == 42) doSomething(); // expected-warning {{reading variable 'c' requires holding mutex 'mu1'}}
c[0].a = 57; // expected-warning {{reading variable 'c' requires holding mutex 'mu1'}}
mu2.Unlock();
}
void test4() { // Literal arrays
if (sa[0] == 42) doSomething(); // expected-warning {{reading variable 'sa' requires holding mutex 'mu1'}}
sa[0] = 57; // expected-warning {{writing variable 'sa' requires holding mutex 'mu1' exclusively}}
if (sc[0].a == 42) doSomething(); // expected-warning {{reading variable 'sc' requires holding mutex 'mu1'}}
sc[0].a = 57; // expected-warning {{writing variable 'sc' requires holding mutex 'mu1' exclusively}}
if (*sa == 42) doSomething(); // expected-warning {{reading variable 'sa' requires holding mutex 'mu1'}}
*sa = 57; // expected-warning {{writing variable 'sa' requires holding mutex 'mu1' exclusively}}
if ((*sc).a == 42) doSomething(); // expected-warning {{reading variable 'sc' requires holding mutex 'mu1'}}
(*sc).a = 57; // expected-warning {{writing variable 'sc' requires holding mutex 'mu1' exclusively}}
if (sc->a == 42) doSomething(); // expected-warning {{reading variable 'sc' requires holding mutex 'mu1'}}
sc->a = 57; // expected-warning {{writing variable 'sc' requires holding mutex 'mu1' exclusively}}
}
void test5() {
mu1.ReaderLock(); // OK -- correct use.
mu2.Lock();
if (*a == 0) doSomething();
*a = 0;
if (c->a == 0) doSomething();
c->a = 0;
if ((*c).a == 0) doSomething();
(*c).a = 0;
mu2.Unlock();
mu1.Unlock();
}
};
class SmartPtr_PtGuardedBy_Test {
Mutex mu1;
Mutex mu2;
SmartPtr<int> sp GUARDED_BY(mu1) PT_GUARDED_BY(mu2);
SmartPtr<Cell> sq GUARDED_BY(mu1) PT_GUARDED_BY(mu2);
void test1() {
mu1.ReaderLock();
mu2.Lock();
sp.get();
if (*sp == 0) doSomething();
*sp = 0;
sq->a = 0;
if (sp[0] == 0) doSomething();
sp[0] = 0;
mu2.Unlock();
mu1.Unlock();
}
void test2() {
mu2.Lock();
sp.get(); // expected-warning {{reading variable 'sp' requires holding mutex 'mu1'}}
if (*sp == 0) doSomething(); // expected-warning {{reading variable 'sp' requires holding mutex 'mu1'}}
*sp = 0; // expected-warning {{reading variable 'sp' requires holding mutex 'mu1'}}
sq->a = 0; // expected-warning {{reading variable 'sq' requires holding mutex 'mu1'}}
if (sp[0] == 0) doSomething(); // expected-warning {{reading variable 'sp' requires holding mutex 'mu1'}}
sp[0] = 0; // expected-warning {{reading variable 'sp' requires holding mutex 'mu1'}}
if (sq[0].a == 0) doSomething(); // expected-warning {{reading variable 'sq' requires holding mutex 'mu1'}}
sq[0].a = 0; // expected-warning {{reading variable 'sq' requires holding mutex 'mu1'}}
mu2.Unlock();
}
void test3() {
mu1.Lock();
sp.get();
if (*sp == 0) doSomething(); // expected-warning {{reading the value pointed to by 'sp' requires holding mutex 'mu2'}}
*sp = 0; // expected-warning {{reading the value pointed to by 'sp' requires holding mutex 'mu2'}}
sq->a = 0; // expected-warning {{reading the value pointed to by 'sq' requires holding mutex 'mu2'}}
if (sp[0] == 0) doSomething(); // expected-warning {{reading the value pointed to by 'sp' requires holding mutex 'mu2'}}
sp[0] = 0; // expected-warning {{reading the value pointed to by 'sp' requires holding mutex 'mu2'}}
if (sq[0].a == 0) doSomething(); // expected-warning {{reading the value pointed to by 'sq' requires holding mutex 'mu2'}}
sq[0].a = 0; // expected-warning {{reading the value pointed to by 'sq' requires holding mutex 'mu2'}}
mu1.Unlock();
}
};
} // end namespace PtGuardedByTest
namespace NonMemberCalleeICETest {
class A {
void Run() {
(RunHelper)(); // expected-warning {{calling function 'RunHelper' requires holding mutex 'M' exclusively}}
}
void RunHelper() __attribute__((exclusive_locks_required(M)));
Mutex M;
};
} // end namespace NonMemberCalleeICETest
namespace pt_guard_attribute_type {
int i PT_GUARDED_BY(sls_mu); // expected-warning {{'pt_guarded_by' only applies to pointer types; type here is 'int'}}
int j PT_GUARDED_VAR; // expected-warning {{'pt_guarded_var' only applies to pointer types; type here is 'int'}}
void test() {
int i PT_GUARDED_BY(sls_mu); // expected-warning {{'pt_guarded_by' attribute only applies to fields and global variables}}
int j PT_GUARDED_VAR; // expected-warning {{'pt_guarded_var' attribute only applies to fields and global variables}}
typedef int PT_GUARDED_BY(sls_mu) bad1; // expected-warning {{'pt_guarded_by' attribute only applies to fields and global variables}}
typedef int PT_GUARDED_VAR bad2; // expected-warning {{'pt_guarded_var' attribute only applies to fields and global variables}}
}
} // end namespace pt_guard_attribute_type
namespace ThreadAttributesOnLambdas {
class Foo {
Mutex mu_;
void LockedFunction() EXCLUSIVE_LOCKS_REQUIRED(mu_);
void test() {
auto func1 = [this]() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
LockedFunction();
};
auto func2 = [this]() NO_THREAD_SAFETY_ANALYSIS {
LockedFunction();
};
auto func3 = [this]() EXCLUSIVE_LOCK_FUNCTION(mu_) {
mu_.Lock();
};
func1(); // expected-warning {{calling function 'operator()' requires holding mutex 'mu_' exclusively}}
func2();
func3();
mu_.Unlock();
}
};
} // end namespace ThreadAttributesOnLambdas
namespace AttributeExpressionCornerCases {
class Foo {
int a GUARDED_BY(getMu());
Mutex* getMu() LOCK_RETURNED("");
Mutex* getUniv() LOCK_RETURNED("*");
void test1() {
a = 0;
}
void test2() EXCLUSIVE_LOCKS_REQUIRED(getUniv()) {
a = 0;
}
void foo(Mutex* mu) EXCLUSIVE_LOCKS_REQUIRED(mu);
void test3() {
foo(nullptr);
}
};
class MapTest {
struct MuCell { Mutex* mu; };
MyMap<MyString, Mutex*> map;
MyMap<MyString, MuCell> mapCell;
int a GUARDED_BY(map["foo"]);
int b GUARDED_BY(mapCell["foo"].mu);
void test() {
map["foo"]->Lock();
a = 0;
map["foo"]->Unlock();
}
void test2() {
mapCell["foo"].mu->Lock();
b = 0;
mapCell["foo"].mu->Unlock();
}
};
class PreciseSmartPtr {
SmartPtr<Mutex> mu;
int val GUARDED_BY(mu);
static bool compare(PreciseSmartPtr& a, PreciseSmartPtr &b) {
a.mu->Lock();
bool result = (a.val == b.val); // expected-warning {{reading variable 'val' requires holding mutex 'b.mu'}} \
// expected-note {{found near match 'a.mu'}}
a.mu->Unlock();
return result;
}
};
class SmartRedeclare {
SmartPtr<Mutex> mu;
int val GUARDED_BY(mu);
void test() EXCLUSIVE_LOCKS_REQUIRED(mu);
void test2() EXCLUSIVE_LOCKS_REQUIRED(mu.get());
void test3() EXCLUSIVE_LOCKS_REQUIRED(mu.get());
};
void SmartRedeclare::test() EXCLUSIVE_LOCKS_REQUIRED(mu.get()) {
val = 0;
}
void SmartRedeclare::test2() EXCLUSIVE_LOCKS_REQUIRED(mu) {
val = 0;
}
void SmartRedeclare::test3() {
val = 0;
}
namespace CustomMutex {
class LOCKABLE BaseMutex { };
class DerivedMutex : public BaseMutex { };
void customLock(const BaseMutex *m) EXCLUSIVE_LOCK_FUNCTION(m);
void customUnlock(const BaseMutex *m) UNLOCK_FUNCTION(m);
static struct DerivedMutex custMu;
static void doSomethingRequiringLock() EXCLUSIVE_LOCKS_REQUIRED(custMu) { }
void customTest() {
customLock(reinterpret_cast<BaseMutex*>(&custMu)); // ignore casts
doSomethingRequiringLock();
customUnlock(reinterpret_cast<BaseMutex*>(&custMu));
}
} // end namespace CustomMutex
} // end AttributeExpressionCornerCases
namespace ScopedLockReturnedInvalid {
class Opaque;
Mutex* getMutex(Opaque* o) LOCK_RETURNED("");
void test(Opaque* o) {
MutexLock lock(getMutex(o));
}
} // end namespace ScopedLockReturnedInvalid
namespace NegativeRequirements {
class Bar {
Mutex mu;
int a GUARDED_BY(mu);
public:
void baz() EXCLUSIVE_LOCKS_REQUIRED(!mu) {
mu.Lock();
a = 0;
mu.Unlock();
}
};
class Foo {
Mutex mu;
int a GUARDED_BY(mu);
public:
void foo() {
mu.Lock(); // warning? needs !mu?
baz(); // expected-warning {{cannot call function 'baz' while mutex 'mu' is held}}
bar();
mu.Unlock();
}
void bar() {
bar2(); // expected-warning {{calling function 'bar2' requires holding '!mu'}}
}
void bar2() EXCLUSIVE_LOCKS_REQUIRED(!mu) {
baz();
}
void baz() EXCLUSIVE_LOCKS_REQUIRED(!mu) {
mu.Lock();
a = 0;
mu.Unlock();
}
void test() {
Bar b;
b.baz(); // no warning -- in different class.
}
};
} // end namespace NegativeRequirements
namespace NegativeThreadRoles {
typedef int __attribute__((capability("role"))) ThreadRole;
void acquire(ThreadRole R) __attribute__((exclusive_lock_function(R))) __attribute__((no_thread_safety_analysis)) {}
void release(ThreadRole R) __attribute__((unlock_function(R))) __attribute__((no_thread_safety_analysis)) {}
ThreadRole FlightControl, Logger;
extern void enque_log_msg(const char *msg);
void log_msg(const char *msg) {
enque_log_msg(msg);
}
void dispatch_log(const char *msg) __attribute__((requires_capability(!FlightControl))) {}
void dispatch_log2(const char *msg) __attribute__((requires_capability(Logger))) {}
void flight_control_entry(void) __attribute__((requires_capability(FlightControl))) {
dispatch_log("wrong"); /* expected-warning {{cannot call function 'dispatch_log' while mutex 'FlightControl' is held}} */
dispatch_log2("also wrong"); /* expected-warning {{calling function 'dispatch_log2' requires holding role 'Logger' exclusively}} */
}
void spawn_fake_flight_control_thread(void) {
acquire(FlightControl);
flight_control_entry();
release(FlightControl);
}
extern const char *deque_log_msg(void) __attribute__((requires_capability(Logger)));
void logger_entry(void) __attribute__((requires_capability(Logger))) {
const char *msg;
while ((msg = deque_log_msg())) {
dispatch_log(msg);
}
}
void spawn_fake_logger_thread(void) {
acquire(Logger);
logger_entry();
release(Logger);
}
int main(void) {
spawn_fake_flight_control_thread();
spawn_fake_logger_thread();
for (;;)
; /* Pretend to dispatch things. */
return 0;
}
} // end namespace NegativeThreadRoles
namespace AssertSharedExclusive {
void doSomething();
class Foo {
Mutex mu;
int a GUARDED_BY(mu);
void test() SHARED_LOCKS_REQUIRED(mu) {
mu.AssertHeld();
if (a > 0)
doSomething();
}
};
} // end namespace AssertSharedExclusive
namespace RangeBasedForAndReferences {
class Foo {
struct MyStruct {
int a;
};
Mutex mu;
int a GUARDED_BY(mu);
MyContainer<int> cntr GUARDED_BY(mu);
MyStruct s GUARDED_BY(mu);
int arr[10] GUARDED_BY(mu);
void nonref_test() {
int b = a; // expected-warning {{reading variable 'a' requires holding mutex 'mu'}}
b = 0; // no warning
}
void auto_test() {
auto b = a; // expected-warning {{reading variable 'a' requires holding mutex 'mu'}}
b = 0; // no warning
auto &c = a; // no warning
c = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu' exclusively}}
}
void ref_test() {
int &b = a;
int &c = b;
int &d = c;
b = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu' exclusively}}
c = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu' exclusively}}
d = 0; // expected-warning {{writing variable 'a' requires holding mutex 'mu' exclusively}}
MyStruct &rs = s;
rs.a = 0; // expected-warning {{writing variable 's' requires holding mutex 'mu' exclusively}}
int (&rarr)[10] = arr;
rarr[2] = 0; // expected-warning {{writing variable 'arr' requires holding mutex 'mu' exclusively}}
}
void ptr_test() {
int *b = &a;
*b = 0; // no expected warning yet
}
void for_test() {
int total = 0;
for (int i : cntr) { // expected-warning2 {{reading variable 'cntr' requires holding mutex 'mu'}}
total += i;
}
}
};
} // end namespace RangeBasedForAndReferences
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