File: closures.c

package info (click to toggle)
glib2.0 2.58.3-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 48,444 kB
  • sloc: ansic: 452,195; xml: 16,781; python: 6,149; makefile: 3,776; sh: 1,499; perl: 1,140; cpp: 9
file content (313 lines) | stat: -rw-r--r-- 8,936 bytes parent folder | download | duplicates (3)
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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
/* Copyright (C) 2005 Imendio AB
 *
 * This software is provided "as is"; redistribution and modification
 * is permitted, provided that the following disclaimer is retained.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * In no event shall the authors or contributors be liable for any
 * direct, indirect, incidental, special, exemplary, or consequential
 * damages (including, but not limited to, procurement of substitute
 * goods or services; loss of use, data, or profits; or business
 * interruption) however caused and on any theory of liability, whether
 * in contract, strict liability, or tort (including negligence or
 * otherwise) arising in any way out of the use of this software, even
 * if advised of the possibility of such damage.
 */
#include <glib-object.h>

#ifdef G_OS_UNIX
#include <unistd.h>
#endif

#define TEST_POINTER1   ((gpointer) 47)
#define TEST_POINTER2   ((gpointer) 49)
#define TEST_INT1       (-77)
#define TEST_INT2       (78)

/* --- GTest class --- */
typedef struct {
  GObject object;
  gint value;
  gpointer test_pointer1;
  gpointer test_pointer2;
} GTest;
typedef struct {
  GObjectClass parent_class;
  void (*test_signal1) (GTest * test, gint an_int);
  void (*test_signal2) (GTest * test, gint an_int);
} GTestClass;

#define G_TYPE_TEST                (my_test_get_type ())
#define MY_TEST(test)              (G_TYPE_CHECK_INSTANCE_CAST ((test), G_TYPE_TEST, GTest))
#define MY_IS_TEST(test)           (G_TYPE_CHECK_INSTANCE_TYPE ((test), G_TYPE_TEST))
#define MY_TEST_CLASS(tclass)      (G_TYPE_CHECK_CLASS_CAST ((tclass), G_TYPE_TEST, GTestClass))
#define MY_IS_TEST_CLASS(tclass)   (G_TYPE_CHECK_CLASS_TYPE ((tclass), G_TYPE_TEST))
#define MY_TEST_GET_CLASS(test)    (G_TYPE_INSTANCE_GET_CLASS ((test), G_TYPE_TEST, GTestClass))

static GType my_test_get_type (void);
G_DEFINE_TYPE (GTest, my_test, G_TYPE_OBJECT)

/* --- variables --- */
static volatile gboolean stopping = FALSE;
static guint             test_signal1 = 0;
static guint             test_signal2 = 0;
static gboolean          seen_signal_handler = FALSE;
static gboolean          seen_cleanup = FALSE;
static gboolean          seen_test_int1 = FALSE;
static gboolean          seen_test_int2 = FALSE;
static gboolean          seen_thread1 = FALSE;
static gboolean          seen_thread2 = FALSE;

/* --- functions --- */
static void
my_test_init (GTest * test)
{
  g_print ("init %p\n", test);

  test->value = 0;
  test->test_pointer1 = TEST_POINTER1;
  test->test_pointer2 = TEST_POINTER2;
}

enum {
  ARG_0,
  ARG_TEST_PROP
};

static void
my_test_set_property (GObject      *object,
                     guint         prop_id,
                     const GValue *value,
                     GParamSpec   *pspec)
{
  GTest *test = MY_TEST (object);
  switch (prop_id)
    {
    case ARG_TEST_PROP:
      test->value = g_value_get_int (value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
my_test_get_property (GObject    *object,
                     guint       prop_id,
                     GValue     *value,
                     GParamSpec *pspec)
{
  GTest *test = MY_TEST (object);
  switch (prop_id)
    {
    case ARG_TEST_PROP:
      g_value_set_int (value, test->value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
my_test_test_signal2 (GTest *test,
                      gint   an_int)
{
}

static void
my_test_emit_test_signal1 (GTest *test,
                           gint   vint)
{
  g_signal_emit (G_OBJECT (test), test_signal1, 0, vint);
}

static void
my_test_emit_test_signal2 (GTest *test,
                           gint   vint)
{
  g_signal_emit (G_OBJECT (test), test_signal2, 0, vint);
}

static void
my_test_class_init (GTestClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  gobject_class->set_property = my_test_set_property;
  gobject_class->get_property = my_test_get_property;

  test_signal1 = g_signal_new ("test-signal1", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
                               G_STRUCT_OFFSET (GTestClass, test_signal1), NULL, NULL,
                               g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
  test_signal2 = g_signal_new ("test-signal2", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
                               G_STRUCT_OFFSET (GTestClass, test_signal2), NULL, NULL,
                               g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TEST_PROP,
                                   g_param_spec_int ("test-prop", "Test Prop", "Test property",
                                                     0, 1, 0, G_PARAM_READWRITE));
  klass->test_signal2 = my_test_test_signal2;
}

static inline guint32
quick_rand32 (void)
{
  static guint32 accu = 2147483563;
  accu = 1664525 * accu + 1013904223;
  return accu;
}

static void
test_closure (GClosure *closure)
{
  /* try to produce high contention in closure->ref_count */
  guint i = 0, n = quick_rand32() % 199;
  for (i = 0; i < n; i++)
    g_closure_ref (closure);
  g_closure_sink (closure); /* NOP */
  for (i = 0; i < n; i++)
    g_closure_unref (closure);
}

static gpointer
thread1_main (gpointer data)
{
  GClosure *closure = data;
  while (!stopping)
    {
      static guint count = 0;
      test_closure (closure);
      if (++count % 10000 == 0)
        {
          g_printerr ("c");
          g_thread_yield(); /* force context switch */
          seen_thread1 = TRUE;
        }
    }
  return NULL;
}

static gpointer
thread2_main (gpointer data)
{
  GClosure *closure = data;
  while (!stopping)
    {
      static guint count = 0;
      test_closure (closure);
      if (++count % 10000 == 0)
        {
          g_printerr ("C");
          g_thread_yield(); /* force context switch */
          seen_thread2 = TRUE;
        }
    }
  return NULL;
}

static void
test_signal_handler (GTest   *test,
                     gint     vint,
                     gpointer data)
{
  g_assert (data == TEST_POINTER2);
  g_assert (test->test_pointer1 == TEST_POINTER1);
  seen_signal_handler = TRUE;
  seen_test_int1 |= vint == TEST_INT1;
  seen_test_int2 |= vint == TEST_INT2;
}

static void
destroy_data (gpointer  data,
              GClosure *closure)
{
  seen_cleanup = data == TEST_POINTER2;
  g_assert (closure->ref_count == 0);
}

static void
test_emissions (GTest *test)
{
  my_test_emit_test_signal1 (test, TEST_INT1);
  my_test_emit_test_signal2 (test, TEST_INT2);
}

int
main (int    argc,
      char **argv)
{
  GThread *thread1, *thread2;
  GClosure *closure;
  GTest *object;
  guint i;

#if defined(__aarch64__) || defined(__arm__)
  if (g_getenv ("DEB_ALLOW_FLAKY_TESTS") != NULL)
    {
      g_print ("SKIP: Test is known to be flaky on arm* (#880883, #917983)\n");
      return 0;
    }
#endif

  g_print ("START: %s\n", argv[0]);
  g_log_set_always_fatal (G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL | g_log_set_always_fatal (G_LOG_FATAL_MASK));

  object = g_object_new (G_TYPE_TEST, NULL);
  closure = g_cclosure_new (G_CALLBACK (test_signal_handler), TEST_POINTER2, destroy_data);

  g_signal_connect_closure (object, "test-signal1", closure, FALSE);
  g_signal_connect_closure (object, "test-signal2", closure, FALSE);

  stopping = FALSE;

  thread1 = g_thread_create (thread1_main, closure, TRUE, NULL);
  thread2 = g_thread_create (thread2_main, closure, TRUE, NULL);

  /* The 16-bit compare-and-swap operations currently used for closure
   * refcounts are really slow on some ARM CPUs, notably Cortex-A57.
   * Reduce the number of iterations so that the test completes in a
   * finite time, but don't reduce it so much that the main thread
   * starves the other threads and causes a test failure.
   *
   * https://gitlab.gnome.org/GNOME/glib/issues/1316
   * aka https://bugs.debian.org/880883 */
#if defined(__aarch64__) || defined(__arm__)
  for (i = 0; i < 100000; i++)
#else
  for (i = 0; i < 1000000; i++)
#endif
    {
      static guint count = 0;
      test_emissions (object);
      if (++count % 10000 == 0)
        {
          g_printerr (".\n");
          g_thread_yield(); /* force context switch */
        }
    }

  stopping = TRUE;
  g_print ("\nstopping\n");

  /* wait for thread shutdown */
  g_thread_join (thread1);
  g_thread_join (thread2);

  /* finalize object, destroy signals, run cleanup code */
  g_object_unref (object);

  g_print ("stopped\n");

  g_assert (seen_thread1 != FALSE);
  g_assert (seen_thread2 != FALSE);
  g_assert (seen_test_int1 != FALSE);
  g_assert (seen_test_int2 != FALSE);
  g_assert (seen_signal_handler != FALSE);
  g_assert (seen_cleanup != FALSE);

  return 0;
}