malloc/tst-malloc.c

   1 /* Copyright (C) 1999-2021 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 <libc-diag.h>
  22
  23 static int errors = 0;
  24
  25 static void
  26 merror (const char *msg)
  27 {
  28   ++errors;
  29   printf ("Error: %s\n", msg);
  30 }
  31
  32 static int
  33 do_test (void)
  34 {
  35   void *p, *q;
  36   int save;
  37
  38   errno = 0;
  39
  40   DIAG_PUSH_NEEDS_COMMENT;
  41 #if __GNUC_PREREQ (7, 0)
  42   /* GCC 7 warns about too-large allocations; here we want to test
  43      that they fail.  */
  44   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  45 #endif
  46   p = malloc (-1);
  47   DIAG_POP_NEEDS_COMMENT;
  48   save = errno;
  49
  50   if (p != NULL)
  51     merror ("malloc (-1) succeeded.");
  52
  53   if (p == NULL && save != ENOMEM)
  54     merror ("errno is not set correctly");
  55
  56   p = malloc (10);
  57   if (p == NULL)
  58     merror ("malloc (10) failed.");
  59
  60   /* realloc (p, 0) == free (p).  */
  61   p = realloc (p, 0);
  62   if (p != NULL)
  63     merror ("realloc (p, 0) failed.");
  64
  65   p = malloc (0);
  66   if (p == NULL)
  67     merror ("malloc (0) failed.");
  68
  69   p = realloc (p, 0);
  70   if (p != NULL)
  71     merror ("realloc (p, 0) failed.");
  72
  73   p = malloc (513 * 1024);
  74   if (p == NULL)
  75     merror ("malloc (513K) failed.");
  76
  77   DIAG_PUSH_NEEDS_COMMENT;
  78 #if __GNUC_PREREQ (7, 0)
  79   /* GCC 7 warns about too-large allocations; here we want to test
  80      that they fail.  */
  81   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  82 #endif
  83   q = malloc (-512 * 1024);
  84   DIAG_POP_NEEDS_COMMENT;
  85   if (q != NULL)
  86     merror ("malloc (-512K) succeeded.");
  87
  88   free (p);
  89
  90   return errors != 0;
  91 }
  92
  93 #define TEST_FUNCTION do_test ()
  94 #include "../test-skeleton.c"