deadlock.MutexType Class Reference

Inheritance diagram for deadlock.MutexType:

Static Public Member Functions
def	get_mutex_type (thread_id, top_line)
def	get_mutex_owner_and_address_func_for_type (mutex_type)

Static Public Attributes
string	PTHREAD_MUTEX_T = 'pthread_mutex_t'
string	PTHREAD_RWLOCK_T = 'pthread_rwlock_t'

Detailed Description

Types of mutexes that we can detect deadlocks.

Definition at line 257 of file deadlock.py.

Member Function Documentation

def deadlock.MutexType.get_mutex_owner_and_address_func_for_type (   mutex_type )

static

Returns a function to resolve the mutex owner and address for
the given type. The returned function f has the following
signature:

    f: args: (map of thread lwp -> thread id), blocked thread lwp
       returns: (lwp of thread owning mutex, mutex address)
        or (None, None) if not found.

Returns None if there is no function for this mutex_type.

Definition at line 281 of file deadlock.py.

    def get_mutex_owner_and_address_func_for_type(mutex_type):
        '''
        Returns a function to resolve the mutex owner and address for
        the given type. The returned function f has the following
        signature:

            f: args: (map of thread lwp -> thread id), blocked thread lwp
               returns: (lwp of thread owning mutex, mutex address)
                        or (None, None) if not found.

        Returns None if there is no function for this mutex_type.
        '''
        if mutex_type == MutexType.PTHREAD_MUTEX_T:
            return get_pthread_mutex_t_owner_and_address
        if mutex_type == MutexType.PTHREAD_RWLOCK_T:
            return get_pthread_rwlock_t_owner_and_address
        return None

def deadlock.MutexType.get_mutex_type (   thread_id,   top_line  )

static

Returns the probable mutex type, based on the first line
of the thread's stack. Returns None if not found.

Definition at line 264 of file deadlock.py.

References deadlock.is_thread_blocked_with_frame().

    def get_mutex_type(thread_id, top_line):
        '''
        Returns the probable mutex type, based on the first line
        of the thread's stack. Returns None if not found.
        '''

        if is_thread_blocked_with_frame(
            thread_id, top_line, '__lll_lock_wait', 'pthread_mutex'
        ):
            return MutexType.PTHREAD_MUTEX_T
        if is_thread_blocked_with_frame(
            thread_id, top_line, 'futex_wait', 'pthread_rwlock'
        ):
            return MutexType.PTHREAD_RWLOCK_T
        return None

Member Data Documentation

string deadlock.MutexType.PTHREAD_MUTEX_T = 'pthread_mutex_t'

static

Definition at line 260 of file deadlock.py.

string deadlock.MutexType.PTHREAD_RWLOCK_T = 'pthread_rwlock_t'

static

Definition at line 261 of file deadlock.py.

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The documentation for this class was generated from the following file:

• proxygen/folly/folly/experimental/gdb/deadlock.py