C++ (Cpp) g_try_malloc0_nの例

コード例 #1

ファイル: coverity-model.c プロジェクト: CasonChan/qemu

void *g_try_malloc0(size_t size)
{
    return g_try_malloc0_n(1, size);
}

コード例 #2

ファイル: mem-overflow.c プロジェクト: MacIrssi/MILibs

static void
mem_overflow (void)
{
  gsize a = G_MAXSIZE / 10 + 10;
  gsize b = 10;
  gpointer p, q;
  typedef char X[10];

#define CHECK_PASS(P)	p = (P); g_assert (p == NULL);
#define CHECK_FAIL(P)	p = (P); g_assert (p != NULL);

  CHECK_PASS (g_try_malloc_n (a, a));
  CHECK_PASS (g_try_malloc_n (a, b));
  CHECK_PASS (g_try_malloc_n (b, a));
  CHECK_FAIL (g_try_malloc_n (b, b));

  CHECK_PASS (g_try_malloc0_n (a, a));
  CHECK_PASS (g_try_malloc0_n (a, b));
  CHECK_PASS (g_try_malloc0_n (b, a));
  CHECK_FAIL (g_try_malloc0_n (b, b));

  q = g_malloc (1);
  CHECK_PASS (g_try_realloc_n (q, a, a));
  CHECK_PASS (g_try_realloc_n (q, a, b));
  CHECK_PASS (g_try_realloc_n (q, b, a));
  CHECK_FAIL (g_try_realloc_n (q, b, b));
  free (p);

  CHECK_PASS (g_try_new (X, a));
  CHECK_FAIL (g_try_new (X, b));

  CHECK_PASS (g_try_new0 (X, a));
  CHECK_FAIL (g_try_new0 (X, b));

  q = g_try_malloc (1);
  CHECK_PASS (g_try_renew (X, q, a));
  CHECK_FAIL (g_try_renew (X, q, b));
  free (p);

#undef CHECK_FAIL
#undef CHECK_PASS

#define CHECK_FAIL(P)	if (g_test_trap_fork (0, G_TEST_TRAP_SILENCE_STDERR)) { p = (P); exit (0); } g_test_trap_assert_failed();
#define CHECK_PASS(P)	if (g_test_trap_fork (0, G_TEST_TRAP_SILENCE_STDERR)) { p = (P); exit (0); } g_test_trap_assert_passed();

  CHECK_FAIL (g_malloc_n (a, a));
  CHECK_FAIL (g_malloc_n (a, b));
  CHECK_FAIL (g_malloc_n (b, a));
  CHECK_PASS (g_malloc_n (b, b));

  CHECK_FAIL (g_malloc0_n (a, a));
  CHECK_FAIL (g_malloc0_n (a, b));
  CHECK_FAIL (g_malloc0_n (b, a));
  CHECK_PASS (g_malloc0_n (b, b));

  q = g_malloc (1);
  CHECK_FAIL (g_realloc_n (q, a, a));
  CHECK_FAIL (g_realloc_n (q, a, b));
  CHECK_FAIL (g_realloc_n (q, b, a));
  CHECK_PASS (g_realloc_n (q, b, b));
  free (q);

  CHECK_FAIL (g_new (X, a));
  CHECK_PASS (g_new (X, b));

  CHECK_FAIL (g_new0 (X, a));
  CHECK_PASS (g_new0 (X, b));

  q = g_malloc (1);
  CHECK_FAIL (g_renew (X, q, a));
  CHECK_PASS (g_renew (X, q, b));
  free (q);
}