1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// RUN: %clang_analyze_cc1 \
// RUN: -analyzer-checker=unix.BlockInCriticalSection \
// RUN: -std=c++11 \
// RUN: -analyzer-output text \
// RUN: -verify %s
unsigned int sleep(unsigned int seconds) {return 0;}
namespace std {
namespace __detail {
class __mutex_base {
public:
void lock();
};
} // namespace __detail
class mutex : public __detail::__mutex_base{
public:
void unlock();
bool try_lock();
};
} // namespace std
void gh_99628() {
std::mutex m;
m.lock();
// expected-note@-1 {{Entering critical section here}}
sleep(10);
// expected-warning@-1 {{Call to blocking function 'sleep' inside of critical section}}
// expected-note@-2 {{Call to blocking function 'sleep' inside of critical section}}
m.unlock();
}
void no_false_positive_gh_104241() {
std::mutex m;
m.lock();
// If inheritance not handled properly, this unlock might not match the lock
// above because technically they act on different memory regions:
// __mutex_base and mutex.
m.unlock();
sleep(10); // no-warning
}
|
