malloc/tst-malloc.c

   1 /* Copyright (C) 1999-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <malloc.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <libc-diag.h>
  23 #include <time.h>
  24
  25 static int errors = 0;
  26
  27 static void
  28 merror (const char *msg)
  29 {
  30   ++errors;
  31   printf ("Error: %s\n", msg);
  32 }
  33
  34 static int
  35 do_test (void)
  36 {
  37   void *p, *q;
  38   int save;
  39
  40   srandom (time (NULL));
  41
  42   errno = 0;
  43
  44   DIAG_PUSH_NEEDS_COMMENT;
  45 #if __GNUC_PREREQ (7, 0)
  46   /* GCC 7 warns about too-large allocations; here we want to test
  47      that they fail.  */
  48   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  49 #endif
  50   p = malloc (-1);
  51   DIAG_POP_NEEDS_COMMENT;
  52   save = errno;
  53
  54   if (p != NULL)
  55     merror ("malloc (-1) succeeded.");
  56
  57   if (p == NULL && save != ENOMEM)
  58     merror ("errno is not set correctly");
  59
  60   p = malloc (10);
  61   if (p == NULL)
  62     merror ("malloc (10) failed.");
  63
  64   /* realloc (p, 0) == free (p).  */
  65   p = realloc (p, 0);
  66   if (p != NULL)
  67     merror ("realloc (p, 0) failed.");
  68
  69   p = malloc (0);
  70   if (p == NULL)
  71     merror ("malloc (0) failed.");
  72
  73   p = realloc (p, 0);
  74   if (p != NULL)
  75     merror ("realloc (p, 0) failed.");
  76
  77   p = malloc (513 * 1024);
  78   if (p == NULL)
  79     merror ("malloc (513K) failed.");
  80
  81   DIAG_PUSH_NEEDS_COMMENT;
  82 #if __GNUC_PREREQ (7, 0)
  83   /* GCC 7 warns about too-large allocations; here we want to test
  84      that they fail.  */
  85   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  86 #endif
  87   q = malloc (-512 * 1024);
  88   DIAG_POP_NEEDS_COMMENT;
  89   if (q != NULL)
  90     merror ("malloc (-512K) succeeded.");
  91
  92   free (p);
  93
  94   return errors != 0;
  95 }
  96
  97 #define TEST_FUNCTION do_test ()
  98 #include "../test-skeleton.c"