1  /* Copyright (C) 2005-2023 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 <stdio.h>
      20  #include <stdlib.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  
      37    errno = 0;
      38  
      39    DIAG_PUSH_NEEDS_COMMENT;
      40  #if __GNUC_PREREQ (7, 0)
      41    /* GCC 7 warns about too-large allocations; here we want to test
      42       that they fail.  */
      43    DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
      44  #endif
      45    p = malloc (-1);
      46    DIAG_POP_NEEDS_COMMENT;
      47  
      48    if (p != NULL)
      49      merror ("malloc (-1) succeeded.");
      50    else if (errno != ENOMEM)
      51      merror ("errno is not set correctly.");
      52  
      53    p = malloc (10);
      54    if (p == NULL)
      55      merror ("malloc (10) failed.");
      56  
      57    p = realloc (p, 0);
      58    if (p != NULL)
      59      merror ("realloc (p, 0) failed.");
      60  
      61    p = malloc (0);
      62    if (p == NULL)
      63      merror ("malloc (0) failed.");
      64  
      65    p = realloc (p, 0);
      66    if (p != NULL)
      67      merror ("realloc (p, 0) failed.");
      68  
      69    q = malloc (256);
      70    if (q == NULL)
      71      merror ("malloc (256) failed.");
      72  
      73    p = malloc (512);
      74    if (p == NULL)
      75      merror ("malloc (512) 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    if (realloc (p, -256) != NULL)
      84      merror ("realloc (p, -256) succeeded.");
      85    else if (errno != ENOMEM)
      86      merror ("errno is not set correctly.");
      87    DIAG_POP_NEEDS_COMMENT;
      88  
      89  #if __GNUC_PREREQ (12, 0)
      90    /* Ignore a valid warning about using a pointer made indeterminate
      91       by a prior call to realloc().  */
      92    DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
      93  #endif
      94    free (p);
      95  #if __GNUC_PREREQ (12, 0)
      96    DIAG_POP_NEEDS_COMMENT;
      97  #endif
      98  
      99    p = malloc (512);
     100    if (p == NULL)
     101      merror ("malloc (512) failed.");
     102  
     103    DIAG_PUSH_NEEDS_COMMENT;
     104  #if __GNUC_PREREQ (7, 0)
     105    /* GCC 7 warns about too-large allocations; here we want to test
     106       that they fail.  */
     107    DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
     108  #endif
     109    if (realloc (p, -1) != NULL)
     110      merror ("realloc (p, -1) succeeded.");
     111    else if (errno != ENOMEM)
     112      merror ("errno is not set correctly.");
     113    DIAG_POP_NEEDS_COMMENT;
     114  
     115  #if __GNUC_PREREQ (12, 0)
     116    /* Ignore a valid warning about using a pointer made indeterminate
     117       by a prior call to realloc().  */
     118    DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
     119  #endif
     120    free (p);
     121  #if __GNUC_PREREQ (12, 0)
     122    DIAG_POP_NEEDS_COMMENT;
     123  #endif
     124    free (q);
     125  
     126    return errors != 0;
     127  }
     128  
     129  #define TEST_FUNCTION do_test ()
     130  #include "../test-skeleton.c"