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65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* Interposed malloc with dynamic TLS.
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Copyright (C) 2024-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include <dlfcn.h>
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__thread unsigned int malloc_subsytem_counter;
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static __typeof (malloc) *malloc_fptr;
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static __typeof (free) *free_fptr;
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static __typeof (calloc) *calloc_fptr;
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static __typeof (realloc) *realloc_fptr;
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static void __attribute__ ((constructor))
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init (void)
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{
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malloc_fptr = dlsym (RTLD_NEXT, "malloc");
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free_fptr = dlsym (RTLD_NEXT, "free");
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calloc_fptr = dlsym (RTLD_NEXT, "calloc");
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realloc_fptr = dlsym (RTLD_NEXT, "realloc");
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}
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void *
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malloc (size_t size)
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{
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++malloc_subsytem_counter;
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return malloc_fptr (size);
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}
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void
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free (void *ptr)
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{
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++malloc_subsytem_counter;
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return free_fptr (ptr);
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}
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void *
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calloc (size_t a, size_t b)
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{
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++malloc_subsytem_counter;
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return calloc_fptr (a, b);
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}
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void *
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realloc (void *ptr, size_t size)
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{
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++malloc_subsytem_counter;
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return realloc_fptr (ptr, size);
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}
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