1  /* Copyright (C) 1999-2023 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"