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Prevent calling into g_cond_wait resp. g_mutex_lock/unlock directly to

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2006-05-10  Sebastian Wilhelmi  <wilhelmi@google.com>

	* gthread/gthread-posix.c, gthread/gthread-win32.c: Prevent
	calling into g_cond_wait resp. g_mutex_lock/unlock directly to
	avoid recursions into the errorcheking mutex code (and out of
	principle anyway). (#335198, Chris Wilson)
This commit is contained in:
Sebastian Wilhelmi 2006-05-11 00:08:31 +00:00 committed by Sebastian Wilhelmi
parent a194e2e971
commit 685da6b099
4 changed files with 87 additions and 71 deletions
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5
ChangeLog
View File

@ -1,5 +1,10 @@
2006-05-10 Sebastian Wilhelmi <wilhelmi@google.com>
* gthread/gthread-posix.c, gthread/gthread-win32.c: Prevent
calling into g_cond_wait resp. g_mutex_lock/unlock directly to
avoid recursions into the errorcheking mutex code (and out of
principle anyway). (#335198, Chris Wilson)
* tests/errorcheck-mutex-test.c: Adapt to GLib coding standards.
2006-05-09 Sebastian Wilhelmi <wilhelmi@google.com>

5
ChangeLog.pre-2-12
View File

@ -1,5 +1,10 @@
2006-05-10 Sebastian Wilhelmi <wilhelmi@google.com>
* gthread/gthread-posix.c, gthread/gthread-win32.c: Prevent
calling into g_cond_wait resp. g_mutex_lock/unlock directly to
avoid recursions into the errorcheking mutex code (and out of
principle anyway). (#335198, Chris Wilson)
* tests/errorcheck-mutex-test.c: Adapt to GLib coding standards.
2006-05-09 Sebastian Wilhelmi <wilhelmi@google.com>

73
gthread/gthread-posix.c
View File

@ -24,10 +24,10 @@
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
/*
/*
* MT safe
*/
@ -90,7 +90,7 @@ static gboolean posix_check_cmd_prio_warned = FALSE;
# define pthread_key_create(a, b) pthread_keycreate (a, b)
# define pthread_attr_init(a) pthread_attr_create (a)
# define pthread_attr_destroy(a) pthread_attr_delete (a)
# define pthread_create(a, b, c, d) pthread_create (a, *b, c, d)
# define pthread_create(a, b, c, d) pthread_create (a, *b, c, d)
# define mutexattr_default (pthread_mutexattr_default)
# define condattr_default (pthread_condattr_default)
#else /* neither G_THREADS_IMPL_POSIX nor G_THREADS_IMPL_DCE are defined */
@ -121,7 +121,7 @@ static gulong g_thread_min_stack_size = 0;
#if defined(_SC_THREAD_STACK_MIN) || defined (HAVE_PRIORITIES)
#define HAVE_G_THREAD_IMPL_INIT
static void
static void
g_thread_impl_init(void)
{
#ifdef _SC_THREAD_STACK_MIN
@ -136,8 +136,8 @@ g_thread_impl_init(void)
priority_normal_value = sched.sched_priority;
}
# else /* G_THREADS_IMPL_DCE */
posix_check_cmd (priority_normal_value =
pthread_getprio (*(pthread_t*)thread,
posix_check_cmd (priority_normal_value =
pthread_getprio (*(pthread_t*)thread,
g_thread_priority_map [priority]));
# endif
#endif /* HAVE_PRIORITIES */
@ -149,7 +149,7 @@ static GMutex *
g_mutex_new_posix_impl (void)
{
GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1);
posix_check_cmd (pthread_mutex_init ((pthread_mutex_t *) result,
posix_check_cmd (pthread_mutex_init ((pthread_mutex_t *) result,
mutexattr_default));
return result;
}
@ -191,7 +191,7 @@ static GCond *
g_cond_new_posix_impl (void)
{
GCond *result = (GCond *) g_new (pthread_cond_t, 1);
posix_check_cmd (pthread_cond_init ((pthread_cond_t *) result,
posix_check_cmd (pthread_cond_init ((pthread_cond_t *) result,
condattr_default));
return result;
}
@ -199,7 +199,7 @@ g_cond_new_posix_impl (void)
/* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait
can be taken directly, as signature and semantic are right, but
without error check then!!!!, we might want to change this
therfore. */
therefore. */
#define G_NSEC_PER_SEC 1000000000
@ -217,27 +217,30 @@ g_cond_timed_wait_posix_impl (GCond * cond,
if (!abs_time)
{
g_cond_wait (cond, entered_mutex);
return TRUE;
result = pthread_cond_wait ((pthread_cond_t *)cond,
(pthread_mutex_t *) entered_mutex);
timed_out = FALSE;
}
else
{
end_time.tv_sec = abs_time->tv_sec;
end_time.tv_nsec = abs_time->tv_usec * (G_NSEC_PER_SEC / G_USEC_PER_SEC);
end_time.tv_sec = abs_time->tv_sec;
end_time.tv_nsec = abs_time->tv_usec * (G_NSEC_PER_SEC / G_USEC_PER_SEC);
g_return_val_if_fail (end_time.tv_nsec < G_NSEC_PER_SEC, TRUE);
result = pthread_cond_timedwait ((pthread_cond_t *) cond,
(pthread_mutex_t *) entered_mutex,
&end_time);
g_return_val_if_fail (end_time.tv_nsec < G_NSEC_PER_SEC, TRUE);
result = pthread_cond_timedwait ((pthread_cond_t *) cond,
(pthread_mutex_t *) entered_mutex,
&end_time);
#ifdef G_THREADS_IMPL_POSIX
timed_out = (result == ETIMEDOUT);
timed_out = (result == ETIMEDOUT);
#else /* G_THREADS_IMPL_DCE */
timed_out = (result == -1) && (errno == EAGAIN);
timed_out = (result == -1) && (errno == EAGAIN);
#endif
}
if (!timed_out)
posix_check_err (posix_error (result), "pthread_cond_timedwait");
return !timed_out;
}
@ -277,7 +280,7 @@ g_private_get_posix_impl (GPrivate * private_key)
#else /* G_THREADS_IMPL_DCE */
{
void* data;
posix_check_cmd (pthread_getspecific (*(pthread_key_t *) private_key,
posix_check_cmd (pthread_getspecific (*(pthread_key_t *) private_key,
&data));
return data;
}
@ -285,8 +288,8 @@ g_private_get_posix_impl (GPrivate * private_key)
}
static void
g_thread_create_posix_impl (GThreadFunc thread_func,
gpointer arg,
g_thread_create_posix_impl (GThreadFunc thread_func,
gpointer arg,
gulong stack_size,
gboolean joinable,
gboolean bound,
@ -302,7 +305,7 @@ g_thread_create_posix_impl (GThreadFunc thread_func,
g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT);
posix_check_cmd (pthread_attr_init (&attr));
#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
if (stack_size)
{
@ -324,7 +327,7 @@ g_thread_create_posix_impl (GThreadFunc thread_func,
posix_check_cmd (pthread_attr_setdetachstate (&attr,
joinable ? PTHREAD_CREATE_JOINABLE : PTHREAD_CREATE_DETACHED));
#endif /* G_THREADS_IMPL_POSIX */
#ifdef HAVE_PRIORITIES
# ifdef G_THREADS_IMPL_POSIX
{
@ -334,11 +337,11 @@ g_thread_create_posix_impl (GThreadFunc thread_func,
posix_check_cmd_prio (pthread_attr_setschedparam (&attr, &sched));
}
# else /* G_THREADS_IMPL_DCE */
posix_check_cmd_prio
posix_check_cmd_prio
(pthread_attr_setprio (&attr, g_thread_priority_map [priority]));
# endif /* G_THREADS_IMPL_DCE */
#endif /* HAVE_PRIORITIES */
ret = posix_error (pthread_create (thread, &attr,
ret = posix_error (pthread_create (thread, &attr,
(void* (*)(void*))thread_func, arg));
posix_check_cmd (pthread_attr_destroy (&attr));
@ -358,7 +361,7 @@ g_thread_create_posix_impl (GThreadFunc thread_func,
#endif /* G_THREADS_IMPL_DCE */
}
static void
static void
g_thread_yield_posix_impl (void)
{
POSIX_YIELD_FUNC;
@ -366,13 +369,13 @@ g_thread_yield_posix_impl (void)
static void
g_thread_join_posix_impl (gpointer thread)
{
{
gpointer ignore;
posix_check_cmd (pthread_join (*(pthread_t*)thread, &ignore));
}
static void
g_thread_exit_posix_impl (void)
static void
g_thread_exit_posix_impl (void)
{
pthread_exit (NULL);
}
@ -387,14 +390,14 @@ g_thread_set_priority_posix_impl (gpointer thread, GThreadPriority priority)
{
struct sched_param sched;
int policy;
posix_check_cmd (pthread_getschedparam (*(pthread_t*)thread, &policy,
posix_check_cmd (pthread_getschedparam (*(pthread_t*)thread, &policy,
&sched));
sched.sched_priority = g_thread_priority_map [priority];
posix_check_cmd_prio (pthread_setschedparam (*(pthread_t*)thread, policy,
posix_check_cmd_prio (pthread_setschedparam (*(pthread_t*)thread, policy,
&sched));
}
# else /* G_THREADS_IMPL_DCE */
posix_check_cmd_prio (pthread_setprio (*(pthread_t*)thread,
posix_check_cmd_prio (pthread_setprio (*(pthread_t*)thread,
g_thread_priority_map [priority]));
# endif
#endif /* HAVE_PRIORITIES */

75
gthread/gthread-win32.c
View File

@ -25,10 +25,10 @@
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
/*
/*
* MT safe
*/
@ -76,6 +76,9 @@ static GDestroyNotify g_private_destructors[G_PRIVATE_MAX];
static guint g_private_next = 0;
/* A "forward" declaration of this structure */
static GThreadFunctions g_thread_functions_for_glib_use_default;
typedef struct _GThreadData GThreadData;
struct _GThreadData
{
@ -85,7 +88,7 @@ struct _GThreadData
gboolean joinable;
};
struct _GCond
struct _GCond
{
GPtrArray *array;
CRITICAL_SECTION lock;
@ -165,7 +168,7 @@ static gboolean
g_mutex_trylock_win32_impl (GMutex * mutex)
{
DWORD result;
win32_check_for_error (WAIT_FAILED !=
win32_check_for_error (WAIT_FAILED !=
(result = WaitForSingleObject (*(HANDLE *)mutex, 0)));
return result != WAIT_TIMEOUT;
}
@ -236,12 +239,12 @@ g_cond_wait_internal (GCond *cond,
g_ptr_array_add (cond->array, event);
LeaveCriticalSection (&cond->lock);
g_mutex_unlock (entered_mutex);
g_thread_functions_for_glib_use_default.mutex_unlock (entered_mutex);
win32_check_for_error (WAIT_FAILED !=
(retval = WaitForSingleObject (event, milliseconds)));
g_mutex_lock (entered_mutex);
g_thread_functions_for_glib_use_default.mutex_lock (entered_mutex);
if (retval == WAIT_TIMEOUT)
{
@ -252,7 +255,7 @@ g_cond_wait_internal (GCond *cond,
* wait for the signal, this time with no timeout, to reset
* it. retval is set again to honour the late arrival of the
* signal */
win32_check_for_error (WAIT_FAILED !=
win32_check_for_error (WAIT_FAILED !=
(retval = WaitForSingleObject (event, 0)));
LeaveCriticalSection (&cond->lock);
@ -270,7 +273,7 @@ g_cond_wait_internal (GCond *cond,
return retval != WAIT_TIMEOUT;
}
static void
static void
g_cond_wait_win32_impl (GCond *cond,
GMutex *entered_mutex)
{
@ -281,7 +284,7 @@ g_cond_wait_win32_impl (GCond *cond,
}
static gboolean
g_cond_timed_wait_win32_impl (GCond *cond,
g_cond_timed_wait_win32_impl (GCond *cond,
GMutex *entered_mutex,
GTimeVal *abs_time)
{
@ -302,9 +305,9 @@ g_cond_timed_wait_win32_impl (GCond *cond,
to_wait = 0;
else
to_wait = (abs_time->tv_sec - current_time.tv_sec) * 1000 +
(abs_time->tv_usec - current_time.tv_usec) / 1000;
(abs_time->tv_usec - current_time.tv_usec) / 1000;
}
return g_cond_wait_internal (cond, entered_mutex, to_wait);
}
@ -381,13 +384,13 @@ g_thread_set_priority_win32_impl (gpointer thread, GThreadPriority priority)
g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW);
g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT);
win32_check_for_error (SetThreadPriority (target->thread,
win32_check_for_error (SetThreadPriority (target->thread,
g_thread_priority_map [priority]));
}
static void
g_thread_self_win32_impl (gpointer thread)
{
{
GThreadData *self = TlsGetValue (g_thread_self_tls);
if (!self)
@ -396,19 +399,19 @@ g_thread_self_win32_impl (gpointer thread)
HANDLE handle = GetCurrentThread ();
HANDLE process = GetCurrentProcess ();
self = g_new (GThreadData, 1);
win32_check_for_error (DuplicateHandle (process, handle, process,
&self->thread, 0, FALSE,
win32_check_for_error (DuplicateHandle (process, handle, process,
&self->thread, 0, FALSE,
DUPLICATE_SAME_ACCESS));
win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
self->func = NULL;
self->data = NULL;
self->data = NULL;
self->joinable = FALSE;
}
*(GThreadData **)thread = self;
}
static void
static void
g_thread_exit_win32_impl (void)
{
GThreadData *self = TlsGetValue (g_thread_self_tls);
@ -430,12 +433,12 @@ g_thread_exit_win32_impl (void)
{
GDestroyNotify destructor = g_private_destructors[i];
GDestroyNotify data = array[i];
if (data)
some_data_non_null = TRUE;
array[i] = NULL;
if (destructor && data)
destructor (data);
}
@ -445,7 +448,7 @@ g_thread_exit_win32_impl (void)
win32_check_for_error (TlsSetValue (g_private_tls, NULL));
}
if (self)
{
if (!self->joinable)
@ -471,7 +474,7 @@ g_thread_proxy (gpointer data)
GThreadData *self = (GThreadData*) data;
win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
self->func (self->data);
g_thread_exit_win32_impl ();
@ -482,35 +485,35 @@ g_thread_proxy (gpointer data)
}
static void
g_thread_create_win32_impl (GThreadFunc func,
gpointer data,
g_thread_create_win32_impl (GThreadFunc func,
gpointer data,
gulong stack_size,
gboolean joinable,
gboolean bound,
GThreadPriority priority,
gpointer thread,
GError **error)
{
{
guint ignore;
GThreadData *retval;
g_return_if_fail (func);
g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW);
g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT);
retval = g_new(GThreadData, 1);
retval->func = func;
retval->data = data;
retval->joinable = joinable;
retval->thread = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_proxy,
retval->thread = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_proxy,
retval, 0, &ignore);
if (retval->thread == NULL)
{
gchar *win_error = g_win32_error_message (GetLastError ());
g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
"Error creating thread: %s", win_error);
g_free (retval);
g_free (win_error);
@ -522,7 +525,7 @@ g_thread_create_win32_impl (GThreadFunc func,
g_thread_set_priority_win32_impl (thread, priority);
}
static void
static void
g_thread_yield_win32_impl (void)
{
Sleep(0);
@ -535,7 +538,7 @@ g_thread_join_win32_impl (gpointer thread)
g_return_if_fail (target->joinable);
win32_check_for_error (WAIT_FAILED !=
win32_check_for_error (WAIT_FAILED !=
WaitForSingleObject (target->thread, INFINITE));
win32_check_for_error (CloseHandle (target->thread));
@ -578,12 +581,12 @@ g_thread_impl_init ()
return;
beenhere = TRUE;
win32_check_for_error (TLS_OUT_OF_INDEXES !=
win32_check_for_error (TLS_OUT_OF_INDEXES !=
(g_thread_self_tls = TlsAlloc ()));
win32_check_for_error (TLS_OUT_OF_INDEXES !=
win32_check_for_error (TLS_OUT_OF_INDEXES !=
(g_private_tls = TlsAlloc ()));
win32_check_for_error (TLS_OUT_OF_INDEXES !=
win32_check_for_error (TLS_OUT_OF_INDEXES !=
(g_cond_event_tls = TlsAlloc ()));
InitializeCriticalSection (&g_thread_global_spinlock);
@ -597,10 +600,10 @@ g_thread_impl_init ()
{
try_enter_critical_section = (GTryEnterCriticalSectionFunc)
GetProcAddress(kernel32, "TryEnterCriticalSection");
/* Even if TryEnterCriticalSection is found, it is not
* necessarily working..., we have to check it */
if (try_enter_critical_section &&
if (try_enter_critical_section &&
try_enter_critical_section (&g_thread_global_spinlock))
{
LeaveCriticalSection (&g_thread_global_spinlock);