kc3-lang/gnulib/tests/test-malloc-gnu.c

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• Hash : 41be6842
  Author :
  Date : 2024-11-04T09:38:03
  

  malloc etc. tests: use volatile more consistently
  
  Typically it’s ineffective to use ‘void *volatile p’
  when testing malloc and similar functions, as the compiler
  can optimize the call to malloc before assigning the result
  to the volatile pointer variable.  Instead, be more systematic
  about calling malloc through a volatile function pointer
  so that the compiler cannot infer that it is a malloc call.
  This fix can’t be done for alloca-like functions which may not
  have a function address, so continue to trust to luck there.
  * tests/test-aligned-malloc.c (aligned4_malloc, aligned4_free)
  (aligned8_malloc, aligned8_free, aligned16_malloc)
  (aligned16_free, aligned32_malloc, aligned32_free):
  * tests/test-aligned_alloc.c (aligned_alloc):
  * tests/test-calloc-gnu.c (calloc):
  * tests/test-free.c (free):
  * tests/test-malloc-gnu.c (malloc):
  * tests/test-reallocarray.c (reallocarray):
  Test indirectly, by calling through a volatile pointer.
  * tests/test-aligned-malloc.c, tests/test-aligned_alloc.c:
  * tests/test-calloc-gnu.c, tests/test-calloc-posix.c:
  * tests/test-free.c, tests/test-malloc-gnu.c:
  * tests/test-malloc-posix.c, tests/test-realloc-posix.c:
  * tests/test-reallocarray.c:
  (main) Don’t bother making data pointers olatile, as it’s ineffective.
  * tests/test-calloc-gnu.c (identity):
  * tests/test-free.c (get_errno, get_errno_func):
  Remove; all uses removed.
  

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• tests/test-malloc-gnu.c

• /* Test of malloc function.
     Copyright (C) 2010-2024 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <stdlib.h>
  
  #include <errno.h>
  #include <stdint.h>
  
  #include "macros.h"
  
  /* Work around clang bug
     <https://github.com/llvm/llvm-project/issues/114772>.  */
  void *(*volatile my_malloc) (size_t) = malloc;
  #undef malloc
  #define malloc my_malloc
  
  int
  main (int argc, _GL_UNUSED char **argv)
  {
    /* Check that malloc (0) is not a NULL pointer.  */
    void *p = malloc (0);
    ASSERT (p != NULL);
    free (p);
  
    /* Check that malloc (n) fails when n exceeds PTRDIFF_MAX.  */
    if (PTRDIFF_MAX < SIZE_MAX)
      {
        size_t one = argc != 12345;
        p = malloc (PTRDIFF_MAX + one);
        ASSERT (p == NULL);
        ASSERT (errno == ENOMEM);
      }
  
    return test_exit_status;
  }
  

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