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glib/gio/tests/testfilemonitor.c
Philip Withnall e5a691e84a tests: Add a test for GFileMonitor deadlocks 
This test is opportunistic in that it’s not possible to detect whether
the race condition has been hit (other than by hitting a deadlock).

So the only approach we can take for testing is to loop over the code
which has previously been known to cause a deadlock a number of times.

The number of repetitions is chosen from running the test with the
deadlock fix reverted.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Helps: #1941
2022-05-31 12:24:13 +01:00

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#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <gio/gio.h>
static gboolean
skip_win32 (void)
{
#ifdef G_OS_WIN32
g_test_skip ("FIXME, test is broken on win32");
return TRUE;
#else
return FALSE;
#endif
}
/* These tests were written for the inotify implementation.
* Other implementations may require slight adjustments in
* the tests, e.g. the length of timeouts
*/
typedef struct
{
GFile *tmp_dir;
} Fixture;
static void
setup (Fixture *fixture,
gconstpointer user_data)
{
gchar *path = NULL;
GError *local_error = NULL;
path = g_dir_make_tmp ("gio-test-testfilemonitor_XXXXXX", &local_error);
g_assert_no_error (local_error);
fixture->tmp_dir = g_file_new_for_path (path);
g_test_message ("Using temporary directory: %s", path);
g_free (path);
}
static void
teardown (Fixture *fixture,
gconstpointer user_data)
{
GError *local_error = NULL;
g_file_delete (fixture->tmp_dir, NULL, &local_error);
g_assert_no_error (local_error);
g_clear_object (&fixture->tmp_dir);
}
typedef enum {
NONE = 0,
INOTIFY = (1 << 1),
KQUEUE = (1 << 2)
} Environment;
typedef struct
{
gint event_type;
gchar *file;
gchar *other_file;
gint step;
/* Since different file monitor implementation has different capabilities,
* we cannot expect all implementations to report all kind of events without
* any loss. This 'optional' field is a bit mask used to mark events which
* may be lost under specific platforms.
*/
Environment optional;
} RecordedEvent;
static void
free_recorded_event (RecordedEvent *event)
{
g_free (event->file);
g_free (event->other_file);
g_free (event);
}
typedef struct
{
GFile *file;
GFileMonitor *monitor;
GMainLoop *loop;
gint step;
GList *events;
GFileOutputStream *output_stream;
} TestData;
static void
output_event (const RecordedEvent *event)
{
if (event->step >= 0)
g_test_message (">>>> step %d", event->step);
else
{
GTypeClass *class;
class = g_type_class_ref (g_type_from_name ("GFileMonitorEvent"));
g_test_message ("%s file=%s other_file=%s\n",
g_enum_get_value (G_ENUM_CLASS (class), event->event_type)->value_nick,
event->file,
event->other_file);
g_type_class_unref (class);
}
}
/* a placeholder for temp file names we don't want to compare */
static const gchar DONT_CARE[] = "";
static Environment
get_environment (GFileMonitor *monitor)
{
if (g_str_equal (G_OBJECT_TYPE_NAME (monitor), "GInotifyFileMonitor"))
return INOTIFY;
if (g_str_equal (G_OBJECT_TYPE_NAME (monitor), "GKqueueFileMonitor"))
return KQUEUE;
return NONE;
}
static void
check_expected_events (RecordedEvent *expected,
gsize n_expected,
GList *recorded,
Environment env)
{
gsize i;
gint li;
GList *l;
for (i = 0, li = 0, l = recorded; i < n_expected && l != NULL;)
{
RecordedEvent *e1 = &expected[i];
RecordedEvent *e2 = l->data;
gboolean mismatch = TRUE;
gboolean l_extra_step = FALSE;
do
{
gboolean ignore_other_file = FALSE;
if (e1->step != e2->step)
break;
/* Kqueue isn't good at detecting file renaming, so
* G_FILE_MONITOR_WATCH_MOVES is mostly useless there. */
if (e1->event_type != e2->event_type && env & KQUEUE)
{
/* It is possible for kqueue file monitor to emit 'RENAMED' event,
* but most of the time it is reported as a 'DELETED' event and
* a 'CREATED' event. */
if (e1->event_type == G_FILE_MONITOR_EVENT_RENAMED)
{
RecordedEvent *e2_next;
if (l->next == NULL)
break;
e2_next = l->next->data;
if (e2->event_type != G_FILE_MONITOR_EVENT_DELETED)
break;
if (e2_next->event_type != G_FILE_MONITOR_EVENT_CREATED)
break;
if (e1->step != e2_next->step)
break;
if (e1->file != DONT_CARE &&
(g_strcmp0 (e1->file, e2->file) != 0 ||
e2->other_file != NULL))
break;
if (e1->other_file != DONT_CARE &&
(g_strcmp0 (e1->other_file, e2_next->file) != 0 ||
e2_next->other_file != NULL))
break;
l_extra_step = TRUE;
mismatch = FALSE;
break;
}
/* Kqueue won't report 'MOVED_IN' and 'MOVED_OUT' events. We set
* 'ignore_other_file' here to let the following code know that
* 'other_file' may not match. */
else if (e1->event_type == G_FILE_MONITOR_EVENT_MOVED_IN)
{
if (e2->event_type != G_FILE_MONITOR_EVENT_CREATED)
break;
ignore_other_file = TRUE;
}
else if (e1->event_type == G_FILE_MONITOR_EVENT_MOVED_OUT)
{
if (e2->event_type != G_FILE_MONITOR_EVENT_DELETED)
break;
ignore_other_file = TRUE;
}
else
break;
}
if (e1->file != DONT_CARE &&
g_strcmp0 (e1->file, e2->file) != 0)
break;
if (e1->other_file != DONT_CARE && !ignore_other_file &&
g_strcmp0 (e1->other_file, e2->other_file) != 0)
break;
mismatch = FALSE;
}
while (0);
if (mismatch)
{
/* Sometimes the emission of 'CHANGES_DONE_HINT' may be late because
* it depends on the ability of file monitor implementation to report
* 'CHANGES_DONE_HINT' itself. If the file monitor implementation
* doesn't report 'CHANGES_DONE_HINT' itself, it may be emitted by
* GLocalFileMonitor after a few seconds, which causes the event to
* mix with results from different steps. Since 'CHANGES_DONE_HINT'
* is just a hint, we don't require it to be reliable and we simply
* ignore unexpected 'CHANGES_DONE_HINT' events here. */
if (e1->event_type != G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT &&
e2->event_type == G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT)
{
g_test_message ("Event CHANGES_DONE_HINT ignored at "
"expected index %" G_GSIZE_FORMAT ", recorded index %d", i, li);
li++, l = l->next;
continue;
}
/* If an event is marked as optional in the current environment and
* the event doesn't match, it means the expected event has lost. */
else if (env & e1->optional)
{
g_test_message ("Event %d at expected index %" G_GSIZE_FORMAT " skipped because "
"it is marked as optional", e1->event_type, i);
i++;
continue;
}
/* Run above checks under g_assert_* again to provide more useful
* error messages. Print the expected and actual events first. */
else
{
GList *ll;
gsize j;
g_test_message ("Recorded events:");
for (ll = recorded; ll != NULL; ll = ll->next)
output_event ((RecordedEvent *) ll->data);
g_test_message ("Expected events:");
for (j = 0; j < n_expected; j++)
output_event (&expected[j]);
g_assert_cmpint (e1->step, ==, e2->step);
g_assert_cmpint (e1->event_type, ==, e2->event_type);
if (e1->file != DONT_CARE)
g_assert_cmpstr (e1->file, ==, e2->file);
if (e1->other_file != DONT_CARE)
g_assert_cmpstr (e1->other_file, ==, e2->other_file);
g_assert_not_reached ();
}
}
i++, li++, l = l->next;
if (l_extra_step)
li++, l = l->next;
}
g_assert_cmpint (i, ==, n_expected);
g_assert_cmpint (li, ==, g_list_length (recorded));
}
static void
record_event (TestData *data,
gint event_type,
const gchar *file,
const gchar *other_file,
gint step)
{
RecordedEvent *event;
event = g_new0 (RecordedEvent, 1);
event->event_type = event_type;
event->file = g_strdup (file);
event->other_file = g_strdup (other_file);
event->step = step;
data->events = g_list_append (data->events, event);
}
static void
monitor_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
TestData *data = user_data;
gchar *basename, *other_base;
basename = g_file_get_basename (file);
if (other_file)
other_base = g_file_get_basename (other_file);
else
other_base = NULL;
record_event (data, event_type, basename, other_base, -1);
g_free (basename);
g_free (other_base);
}
static gboolean
atomic_replace_step (gpointer user_data)
{
TestData *data = user_data;
GError *error = NULL;
switch (data->step)
{
case 0:
record_event (data, -1, NULL, NULL, 0);
g_file_replace_contents (data->file, "step 0", 6, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
break;
case 1:
record_event (data, -1, NULL, NULL, 1);
g_file_replace_contents (data->file, "step 1", 6, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
break;
case 2:
record_event (data, -1, NULL, NULL, 2);
g_file_delete (data->file, NULL, NULL);
break;
case 3:
record_event (data, -1, NULL, NULL, 3);
g_main_loop_quit (data->loop);
return G_SOURCE_REMOVE;
}
data->step++;
return G_SOURCE_CONTINUE;
}
/* this is the output we expect from the above steps */
static RecordedEvent atomic_replace_output[] = {
{ -1, NULL, NULL, 0, NONE },
{ G_FILE_MONITOR_EVENT_CREATED, "atomic_replace_file", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGED, "atomic_replace_file", NULL, -1, KQUEUE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "atomic_replace_file", NULL, -1, KQUEUE },
{ -1, NULL, NULL, 1, NONE },
{ G_FILE_MONITOR_EVENT_RENAMED, (gchar*)DONT_CARE, "atomic_replace_file", -1, NONE },
{ -1, NULL, NULL, 2, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "atomic_replace_file", NULL, -1, NONE },
{ -1, NULL, NULL, 3, NONE }
};
static void
test_atomic_replace (Fixture *fixture,
gconstpointer user_data)
{
GError *error = NULL;
TestData data;
if (skip_win32 ())
return;
data.step = 0;
data.events = NULL;
data.file = g_file_get_child (fixture->tmp_dir, "atomic_replace_file");
g_file_delete (data.file, NULL, NULL);
data.monitor = g_file_monitor_file (data.file, G_FILE_MONITOR_WATCH_MOVES, NULL, &error);
g_assert_no_error (error);
g_test_message ("Using GFileMonitor %s", G_OBJECT_TYPE_NAME (data.monitor));
g_file_monitor_set_rate_limit (data.monitor, 200);
g_signal_connect (data.monitor, "changed", G_CALLBACK (monitor_changed), &data);
data.loop = g_main_loop_new (NULL, TRUE);
g_timeout_add (500, atomic_replace_step, &data);
g_main_loop_run (data.loop);
check_expected_events (atomic_replace_output,
G_N_ELEMENTS (atomic_replace_output),
data.events,
get_environment (data.monitor));
g_list_free_full (data.events, (GDestroyNotify)free_recorded_event);
g_main_loop_unref (data.loop);
g_object_unref (data.monitor);
g_object_unref (data.file);
}
static gboolean
change_step (gpointer user_data)
{
TestData *data = user_data;
GOutputStream *stream;
GError *error = NULL;
guint32 mode = 0660;
switch (data->step)
{
case 0:
record_event (data, -1, NULL, NULL, 0);
g_file_replace_contents (data->file, "step 0", 6, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
break;
case 1:
record_event (data, -1, NULL, NULL, 1);
stream = (GOutputStream *)g_file_append_to (data->file, G_FILE_CREATE_NONE, NULL, &error);
g_assert_no_error (error);
g_output_stream_write_all (stream, " step 1", 7, NULL, NULL, &error);
g_assert_no_error (error);
g_output_stream_close (stream, NULL, &error);
g_assert_no_error (error);
g_object_unref (stream);
break;
case 2:
record_event (data, -1, NULL, NULL, 2);
g_file_set_attribute (data->file,
G_FILE_ATTRIBUTE_UNIX_MODE,
G_FILE_ATTRIBUTE_TYPE_UINT32,
&mode,
G_FILE_QUERY_INFO_NONE,
NULL,
&error);
g_assert_no_error (error);
break;
case 3:
record_event (data, -1, NULL, NULL, 3);
g_file_delete (data->file, NULL, NULL);
break;
case 4:
record_event (data, -1, NULL, NULL, 4);
g_main_loop_quit (data->loop);
return G_SOURCE_REMOVE;
}
data->step++;
return G_SOURCE_CONTINUE;
}
/* this is the output we expect from the above steps */
static RecordedEvent change_output[] = {
{ -1, NULL, NULL, 0, NONE },
{ G_FILE_MONITOR_EVENT_CREATED, "change_file", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGED, "change_file", NULL, -1, KQUEUE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "change_file", NULL, -1, KQUEUE },
{ -1, NULL, NULL, 1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGED, "change_file", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "change_file", NULL, -1, NONE },
{ -1, NULL, NULL, 2, NONE },
{ G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED, "change_file", NULL, -1, NONE },
{ -1, NULL, NULL, 3, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "change_file", NULL, -1, NONE },
{ -1, NULL, NULL, 4, NONE }
};
static void
test_file_changes (Fixture *fixture,
gconstpointer user_data)
{
GError *error = NULL;
TestData data;
if (skip_win32 ())
return;
data.step = 0;
data.events = NULL;
data.file = g_file_get_child (fixture->tmp_dir, "change_file");
g_file_delete (data.file, NULL, NULL);
data.monitor = g_file_monitor_file (data.file, G_FILE_MONITOR_WATCH_MOVES, NULL, &error);
g_assert_no_error (error);
g_test_message ("Using GFileMonitor %s", G_OBJECT_TYPE_NAME (data.monitor));
g_file_monitor_set_rate_limit (data.monitor, 200);
g_signal_connect (data.monitor, "changed", G_CALLBACK (monitor_changed), &data);
data.loop = g_main_loop_new (NULL, TRUE);
g_timeout_add (500, change_step, &data);
g_main_loop_run (data.loop);
check_expected_events (change_output,
G_N_ELEMENTS (change_output),
data.events,
get_environment (data.monitor));
g_list_free_full (data.events, (GDestroyNotify)free_recorded_event);
g_main_loop_unref (data.loop);
g_object_unref (data.monitor);
g_object_unref (data.file);
}
static gboolean
dir_step (gpointer user_data)
{
TestData *data = user_data;
GFile *parent, *file, *file2;
GError *error = NULL;
switch (data->step)
{
case 1:
record_event (data, -1, NULL, NULL, 1);
parent = g_file_get_parent (data->file);
file = g_file_get_child (parent, "dir_test_file");
g_file_replace_contents (file, "step 1", 6, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
g_object_unref (file);
g_object_unref (parent);
break;
case 2:
record_event (data, -1, NULL, NULL, 2);
parent = g_file_get_parent (data->file);
file = g_file_get_child (parent, "dir_test_file");
file2 = g_file_get_child (data->file, "dir_test_file");
g_file_move (file, file2, G_FILE_COPY_NONE, NULL, NULL, NULL, &error);
g_assert_no_error (error);
g_object_unref (file);
g_object_unref (file2);
g_object_unref (parent);
break;
case 3:
record_event (data, -1, NULL, NULL, 3);
file = g_file_get_child (data->file, "dir_test_file");
file2 = g_file_get_child (data->file, "dir_test_file2");
g_file_move (file, file2, G_FILE_COPY_NONE, NULL, NULL, NULL, &error);
g_assert_no_error (error);
g_object_unref (file);
g_object_unref (file2);
break;
case 4:
record_event (data, -1, NULL, NULL, 4);
parent = g_file_get_parent (data->file);
file = g_file_get_child (data->file, "dir_test_file2");
file2 = g_file_get_child (parent, "dir_test_file2");
g_file_move (file, file2, G_FILE_COPY_NONE, NULL, NULL, NULL, &error);
g_assert_no_error (error);
g_file_delete (file2, NULL, NULL);
g_object_unref (file);
g_object_unref (file2);
g_object_unref (parent);
break;
case 5:
record_event (data, -1, NULL, NULL, 5);
g_file_delete (data->file, NULL, NULL);
break;
case 6:
record_event (data, -1, NULL, NULL, 6);
g_main_loop_quit (data->loop);
return G_SOURCE_REMOVE;
}
data->step++;
return G_SOURCE_CONTINUE;
}
/* this is the output we expect from the above steps */
static RecordedEvent dir_output[] = {
{ -1, NULL, NULL, 1, NONE },
{ -1, NULL, NULL, 2, NONE },
{ G_FILE_MONITOR_EVENT_MOVED_IN, "dir_test_file", NULL, -1, NONE },
{ -1, NULL, NULL, 3, NONE },
{ G_FILE_MONITOR_EVENT_RENAMED, "dir_test_file", "dir_test_file2", -1, NONE },
{ -1, NULL, NULL, 4, NONE },
{ G_FILE_MONITOR_EVENT_MOVED_OUT, "dir_test_file2", NULL, -1, NONE },
{ -1, NULL, NULL, 5, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "dir_monitor_test", NULL, -1, NONE },
{ -1, NULL, NULL, 6, NONE }
};
static void
test_dir_monitor (Fixture *fixture,
gconstpointer user_data)
{
GError *error = NULL;
TestData data;
if (skip_win32 ())
return;
data.step = 0;
data.events = NULL;
data.file = g_file_get_child (fixture->tmp_dir, "dir_monitor_test");
g_file_delete (data.file, NULL, NULL);
g_file_make_directory (data.file, NULL, &error);
data.monitor = g_file_monitor_directory (data.file, G_FILE_MONITOR_WATCH_MOVES, NULL, &error);
g_assert_no_error (error);
g_test_message ("Using GFileMonitor %s", G_OBJECT_TYPE_NAME (data.monitor));
g_file_monitor_set_rate_limit (data.monitor, 200);
g_signal_connect (data.monitor, "changed", G_CALLBACK (monitor_changed), &data);
data.loop = g_main_loop_new (NULL, TRUE);
g_timeout_add (500, dir_step, &data);
g_main_loop_run (data.loop);
check_expected_events (dir_output,
G_N_ELEMENTS (dir_output),
data.events,
get_environment (data.monitor));
g_list_free_full (data.events, (GDestroyNotify)free_recorded_event);
g_main_loop_unref (data.loop);
g_object_unref (data.monitor);
g_object_unref (data.file);
}
static gboolean
nodir_step (gpointer user_data)
{
TestData *data = user_data;
GFile *parent;
GError *error = NULL;
switch (data->step)
{
case 0:
record_event (data, -1, NULL, NULL, 0);
parent = g_file_get_parent (data->file);
g_file_make_directory (parent, NULL, &error);
g_assert_no_error (error);
g_object_unref (parent);
break;
case 1:
record_event (data, -1, NULL, NULL, 1);
g_file_replace_contents (data->file, "step 1", 6, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
break;
case 2:
record_event (data, -1, NULL, NULL, 2);
g_file_delete (data->file, NULL, &error);
g_assert_no_error (error);
break;
case 3:
record_event (data, -1, NULL, NULL, 3);
parent = g_file_get_parent (data->file);
g_file_delete (parent, NULL, &error);
g_assert_no_error (error);
g_object_unref (parent);
break;
case 4:
record_event (data, -1, NULL, NULL, 4);
g_main_loop_quit (data->loop);
return G_SOURCE_REMOVE;
}
data->step++;
return G_SOURCE_CONTINUE;
}
static RecordedEvent nodir_output[] = {
{ -1, NULL, NULL, 0, NONE },
{ G_FILE_MONITOR_EVENT_CREATED, "nosuchfile", NULL, -1, KQUEUE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "nosuchfile", NULL, -1, KQUEUE },
{ -1, NULL, NULL, 1, NONE },
{ G_FILE_MONITOR_EVENT_CREATED, "nosuchfile", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGED, "nosuchfile", NULL, -1, KQUEUE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "nosuchfile", NULL, -1, KQUEUE },
{ -1, NULL, NULL, 2, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "nosuchfile", NULL, -1, NONE },
{ -1, NULL, NULL, 3, NONE },
{ -1, NULL, NULL, 4, NONE }
};
static void
test_dir_non_existent (Fixture *fixture,
gconstpointer user_data)
{
TestData data;
GError *error = NULL;
if (skip_win32 ())
return;
data.step = 0;
data.events = NULL;
data.file = g_file_get_child (fixture->tmp_dir, "nosuchdir/nosuchfile");
data.monitor = g_file_monitor_file (data.file, G_FILE_MONITOR_WATCH_MOVES, NULL, &error);
g_assert_no_error (error);
g_test_message ("Using GFileMonitor %s", G_OBJECT_TYPE_NAME (data.monitor));
g_file_monitor_set_rate_limit (data.monitor, 200);
g_signal_connect (data.monitor, "changed", G_CALLBACK (monitor_changed), &data);
data.loop = g_main_loop_new (NULL, TRUE);
/* we need a long timeout here, since the inotify implementation only scans
* for missing files every 4 seconds.
*/
g_timeout_add (5000, nodir_step, &data);
g_main_loop_run (data.loop);
check_expected_events (nodir_output,
G_N_ELEMENTS (nodir_output),
data.events,
get_environment (data.monitor));
g_list_free_full (data.events, (GDestroyNotify)free_recorded_event);
g_main_loop_unref (data.loop);
g_object_unref (data.monitor);
g_object_unref (data.file);
}
static gboolean
cross_dir_step (gpointer user_data)
{
TestData *data = user_data;
GFile *file, *file2;
GError *error = NULL;
switch (data[0].step)
{
case 0:
record_event (&data[0], -1, NULL, NULL, 0);
record_event (&data[1], -1, NULL, NULL, 0);
file = g_file_get_child (data[1].file, "a");
g_file_replace_contents (file, "step 0", 6, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
g_object_unref (file);
break;
case 1:
record_event (&data[0], -1, NULL, NULL, 1);
record_event (&data[1], -1, NULL, NULL, 1);
file = g_file_get_child (data[1].file, "a");
file2 = g_file_get_child (data[0].file, "a");
g_file_move (file, file2, 0, NULL, NULL, NULL, &error);
g_assert_no_error (error);
g_object_unref (file);
g_object_unref (file2);
break;
case 2:
record_event (&data[0], -1, NULL, NULL, 2);
record_event (&data[1], -1, NULL, NULL, 2);
file2 = g_file_get_child (data[0].file, "a");
g_file_delete (file2, NULL, NULL);
g_file_delete (data[0].file, NULL, NULL);
g_file_delete (data[1].file, NULL, NULL);
g_object_unref (file2);
break;
case 3:
record_event (&data[0], -1, NULL, NULL, 3);
record_event (&data[1], -1, NULL, NULL, 3);
g_main_loop_quit (data->loop);
return G_SOURCE_REMOVE;
}
data->step++;
return G_SOURCE_CONTINUE;
}
static RecordedEvent cross_dir_a_output[] = {
{ -1, NULL, NULL, 0, NONE },
{ -1, NULL, NULL, 1, NONE },
{ G_FILE_MONITOR_EVENT_CREATED, "a", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "a", NULL, -1, KQUEUE },
{ -1, NULL, NULL, 2, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "a", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "cross_dir_a", NULL, -1, NONE },
{ -1, NULL, NULL, 3, NONE },
};
static RecordedEvent cross_dir_b_output[] = {
{ -1, NULL, NULL, 0, NONE },
{ G_FILE_MONITOR_EVENT_CREATED, "a", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGED, "a", NULL, -1, KQUEUE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "a", NULL, -1, KQUEUE },
{ -1, NULL, NULL, 1, NONE },
{ G_FILE_MONITOR_EVENT_MOVED_OUT, "a", "a", -1, NONE },
{ -1, NULL, NULL, 2, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "cross_dir_b", NULL, -1, NONE },
{ -1, NULL, NULL, 3, NONE },
};
static void
test_cross_dir_moves (Fixture *fixture,
gconstpointer user_data)
{
GError *error = NULL;
TestData data[2];
if (skip_win32 ())
return;
data[0].step = 0;
data[0].events = NULL;
data[0].file = g_file_get_child (fixture->tmp_dir, "cross_dir_a");
g_file_delete (data[0].file, NULL, NULL);
g_file_make_directory (data[0].file, NULL, &error);
data[0].monitor = g_file_monitor_directory (data[0].file, 0, NULL, &error);
g_assert_no_error (error);
g_test_message ("Using GFileMonitor 0 %s", G_OBJECT_TYPE_NAME (data[0].monitor));
g_file_monitor_set_rate_limit (data[0].monitor, 200);
g_signal_connect (data[0].monitor, "changed", G_CALLBACK (monitor_changed), &data[0]);
data[1].step = 0;
data[1].events = NULL;
data[1].file = g_file_get_child (fixture->tmp_dir, "cross_dir_b");
g_file_delete (data[1].file, NULL, NULL);
g_file_make_directory (data[1].file, NULL, &error);
data[1].monitor = g_file_monitor_directory (data[1].file, G_FILE_MONITOR_WATCH_MOVES, NULL, &error);
g_assert_no_error (error);
g_test_message ("Using GFileMonitor 1 %s", G_OBJECT_TYPE_NAME (data[1].monitor));
g_file_monitor_set_rate_limit (data[1].monitor, 200);
g_signal_connect (data[1].monitor, "changed", G_CALLBACK (monitor_changed), &data[1]);
data[0].loop = g_main_loop_new (NULL, TRUE);
g_timeout_add (500, cross_dir_step, data);
g_main_loop_run (data[0].loop);
check_expected_events (cross_dir_a_output,
G_N_ELEMENTS (cross_dir_a_output),
data[0].events,
get_environment (data[0].monitor));
check_expected_events (cross_dir_b_output,
G_N_ELEMENTS (cross_dir_b_output),
data[1].events,
get_environment (data[1].monitor));
g_list_free_full (data[0].events, (GDestroyNotify)free_recorded_event);
g_main_loop_unref (data[0].loop);
g_object_unref (data[0].monitor);
g_object_unref (data[0].file);
g_list_free_full (data[1].events, (GDestroyNotify)free_recorded_event);
g_object_unref (data[1].monitor);
g_object_unref (data[1].file);
}
static gboolean
file_hard_links_step (gpointer user_data)
{
gboolean retval = G_SOURCE_CONTINUE;
TestData *data = user_data;
GError *error = NULL;
gchar *filename = g_file_get_path (data->file);
gchar *hard_link_name = g_strdup_printf ("%s2", filename);
GFile *hard_link_file = g_file_new_for_path (hard_link_name);
switch (data->step)
{
case 0:
record_event (data, -1, NULL, NULL, 0);
g_output_stream_write_all (G_OUTPUT_STREAM (data->output_stream),
"hello, step 0", 13, NULL, NULL, &error);
g_assert_no_error (error);
g_output_stream_close (G_OUTPUT_STREAM (data->output_stream), NULL, &error);
g_assert_no_error (error);
break;
case 1:
record_event (data, -1, NULL, NULL, 1);
g_file_replace_contents (data->file, "step 1", 6, NULL, FALSE,
G_FILE_CREATE_NONE, NULL, NULL, &error);
g_assert_no_error (error);
break;
case 2:
record_event (data, -1, NULL, NULL, 2);
#ifdef HAVE_LINK
if (link (filename, hard_link_name) < 0)
{
g_error ("link(%s, %s) failed: %s", filename, hard_link_name, g_strerror (errno));
}
#endif /* HAVE_LINK */
break;
case 3:
record_event (data, -1, NULL, NULL, 3);
#ifdef HAVE_LINK
{
GOutputStream *hard_link_stream = NULL;
/* Deliberately don’t do an atomic swap on the hard-linked file. */
hard_link_stream = G_OUTPUT_STREAM (g_file_append_to (hard_link_file,
G_FILE_CREATE_NONE,
NULL, &error));
g_assert_no_error (error);
g_output_stream_write_all (hard_link_stream, " step 3", 7, NULL, NULL, &error);
g_assert_no_error (error);
g_output_stream_close (hard_link_stream, NULL, &error);
g_assert_no_error (error);
g_object_unref (hard_link_stream);
}
#endif /* HAVE_LINK */
break;
case 4:
record_event (data, -1, NULL, NULL, 4);
g_file_delete (data->file, NULL, &error);
g_assert_no_error (error);
break;
case 5:
record_event (data, -1, NULL, NULL, 5);
#ifdef HAVE_LINK
g_file_delete (hard_link_file, NULL, &error);
g_assert_no_error (error);
#endif /* HAVE_LINK */
break;
case 6:
record_event (data, -1, NULL, NULL, 6);
g_main_loop_quit (data->loop);
retval = G_SOURCE_REMOVE;
break;
}
if (retval != G_SOURCE_REMOVE)
data->step++;
g_object_unref (hard_link_file);
g_free (hard_link_name);
g_free (filename);
return retval;
}
static RecordedEvent file_hard_links_output[] = {
{ -1, NULL, NULL, 0, NONE },
{ G_FILE_MONITOR_EVENT_CHANGED, "testfilemonitor.db", NULL, -1, NONE },
{ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, "testfilemonitor.db", NULL, -1, NONE },
{ -1, NULL, NULL, 1, NONE },
{ G_FILE_MONITOR_EVENT_RENAMED, (gchar*)DONT_CARE /* .goutputstream-XXXXXX */, "testfilemonitor.db", -1, NONE },
{ -1, NULL, NULL, 2, NONE },
{ -1, NULL, NULL, 3, NONE },
/* Kqueue is based on file descriptors. You can get events from all hard
* links by just monitoring one open file descriptor, and it is not possible
* to know whether it is done on the file name we use to open the file. Since
* the hard link count of 'testfilemonitor.db' is 2, it is expected to see
* two 'DELETED' events reported here. You have to call 'unlink' twice on
* different file names to remove 'testfilemonitor.db' from the file system,
* and each 'unlink' call generates a 'DELETED' event. */
{ G_FILE_MONITOR_EVENT_CHANGED, "testfilemonitor.db", NULL, -1, INOTIFY },
{ -1, NULL, NULL, 4, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "testfilemonitor.db", NULL, -1, NONE },
{ -1, NULL, NULL, 5, NONE },
{ G_FILE_MONITOR_EVENT_DELETED, "testfilemonitor.db", NULL, -1, INOTIFY },
{ -1, NULL, NULL, 6, NONE },
};
static void
test_file_hard_links (Fixture *fixture,
gconstpointer user_data)
{
GError *error = NULL;
TestData data;
g_test_bug ("https://bugzilla.gnome.org/show_bug.cgi?id=755721");
if (skip_win32 ())
return;
#ifdef HAVE_LINK
g_test_message ("Running with hard link tests");
#else /* if !HAVE_LINK */
g_test_message ("Running without hard link tests");
#endif /* !HAVE_LINK */
data.step = 0;
data.events = NULL;
/* Create a file which exists and is not a directory. */
data.file = g_file_get_child (fixture->tmp_dir, "testfilemonitor.db");
data.output_stream = g_file_replace (data.file, NULL, FALSE,
G_FILE_CREATE_NONE, NULL, &error);
g_assert_no_error (error);
/* Monitor it. Creating the monitor should not crash (bug #755721). */
data.monitor = g_file_monitor_file (data.file,
G_FILE_MONITOR_WATCH_MOUNTS |
G_FILE_MONITOR_WATCH_MOVES |
G_FILE_MONITOR_WATCH_HARD_LINKS,
NULL,
&error);
g_assert_no_error (error);
g_assert_nonnull (data.monitor);
g_test_message ("Using GFileMonitor %s", G_OBJECT_TYPE_NAME (data.monitor));
/* Change the file a bit. */
g_file_monitor_set_rate_limit (data.monitor, 200);
g_signal_connect (data.monitor, "changed", (GCallback) monitor_changed, &data);
data.loop = g_main_loop_new (NULL, TRUE);
g_timeout_add (500, file_hard_links_step, &data);
g_main_loop_run (data.loop);
check_expected_events (file_hard_links_output,
G_N_ELEMENTS (file_hard_links_output),
data.events,
get_environment (data.monitor));
g_list_free_full (data.events, (GDestroyNotify) free_recorded_event);
g_main_loop_unref (data.loop);
g_object_unref (data.monitor);
g_object_unref (data.file);
g_object_unref (data.output_stream);
}
static void
test_finalize_in_callback (Fixture *fixture,
gconstpointer user_data)
{
GFile *file = NULL;
guint i;
g_test_summary ("Test that finalization of a GFileMonitor in one of its "
"callbacks doesn’t cause a deadlock.");
g_test_bug ("https://gitlab.gnome.org/GNOME/glib/-/issues/1941");
file = g_file_get_child (fixture->tmp_dir, "race-file");
for (i = 0; i < 50; i++)
{
GFileMonitor *monitor = NULL;
GError *local_error = NULL;
/* Monitor the file. */
monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, &local_error);
g_assert_no_error (local_error);
g_assert_nonnull (monitor);
/* Create the file. */
g_file_replace_contents (file, "hello", 5, NULL, FALSE,
G_FILE_CREATE_NONE, NULL, NULL, &local_error);
g_assert_no_error (local_error);
/* Immediately drop the last ref to the monitor in the hope that this
* happens in the middle of the critical section in
* g_file_monitor_source_handle_event(), so that any cleanup at the end
* of that function is done with a now-finalised file monitor. */
g_object_unref (monitor);
/* Re-create the monitor and do the same again for deleting the file, to
* give a second chance at hitting the race condition. */
monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, &local_error);
g_assert_no_error (local_error);
g_assert_nonnull (monitor);
/* Delete the file. */
g_file_delete (file, NULL, &local_error);
g_assert_no_error (local_error);
/* Drop the ref again. */
g_object_unref (monitor);
}
g_object_unref (file);
}
int
main (int argc, char *argv[])
{
g_test_init (&argc, &argv, NULL);
g_test_add ("/monitor/atomic-replace", Fixture, NULL, setup, test_atomic_replace, teardown);
g_test_add ("/monitor/file-changes", Fixture, NULL, setup, test_file_changes, teardown);
g_test_add ("/monitor/dir-monitor", Fixture, NULL, setup, test_dir_monitor, teardown);
g_test_add ("/monitor/dir-not-existent", Fixture, NULL, setup, test_dir_non_existent, teardown);
g_test_add ("/monitor/cross-dir-moves", Fixture, NULL, setup, test_cross_dir_moves, teardown);
g_test_add ("/monitor/file/hard-links", Fixture, NULL, setup, test_file_hard_links, teardown);
g_test_add ("/monitor/finalize-in-callback", Fixture, NULL, setup, test_finalize_in_callback, teardown);
return g_test_run ();
}
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