1  /* mtrace API for `malloc'.
       2     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #if !IS_IN (libc)
      20  # include "mtrace-impl.c"
      21  #else
      22  # include <shlib-compat.h>
      23  # include <libc-symbols.h>
      24  #endif
      25  
      26  #if IS_IN (libc) && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_34)
      27  /* Compatibility symbols that were introduced to help break at allocation sites
      28     for specific memory allocations.  This is unusable with ASLR, although gdb
      29     may allow predictable allocation addresses.  Even then, gdb has watchpoint
      30     and conditional breakpoint support which should provide the same
      31     functionality without having this kludge.  These symbols are preserved in
      32     case some applications ended up linking against them but they don't actually
      33     do anything anymore; not that they did much before anyway.  */
      34  
      35  void *mallwatch;
      36  compat_symbol (libc, mallwatch, mallwatch, GLIBC_2_0);
      37  
      38  void
      39  tr_break (void)
      40  {
      41  }
      42  compat_symbol (libc, tr_break, tr_break, GLIBC_2_0);
      43  #endif
      44  
      45  
      46  void
      47  mtrace (void)
      48  {
      49  #if !IS_IN (libc)
      50    do_mtrace ();
      51  #endif
      52  }
      53  
      54  void
      55  muntrace (void)
      56  {
      57  #if !IS_IN (libc)
      58    do_muntrace ();
      59  #endif
      60  }