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/* Interposed malloc with dynamic TLS.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <dlfcn.h>
__thread unsigned int malloc_subsytem_counter;
static __typeof (malloc) *malloc_fptr;
static __typeof (free) *free_fptr;
static __typeof (calloc) *calloc_fptr;
static __typeof (realloc) *realloc_fptr;
static void __attribute__ ((constructor))
init (void)
{
malloc_fptr = dlsym (RTLD_NEXT, "malloc");
free_fptr = dlsym (RTLD_NEXT, "free");
calloc_fptr = dlsym (RTLD_NEXT, "calloc");
realloc_fptr = dlsym (RTLD_NEXT, "realloc");
}
void *
malloc (size_t size)
{
++malloc_subsytem_counter;
return malloc_fptr (size);
}
void
free (void *ptr)
{
++malloc_subsytem_counter;
return free_fptr (ptr);
}
void *
calloc (size_t a, size_t b)
{
++malloc_subsytem_counter;
return calloc_fptr (a, b);
}
void *
realloc (void *ptr, size_t size)
{
++malloc_subsytem_counter;
return realloc_fptr (ptr, size);
}
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