drd/drd_darwin_intercepts.c

   1 /*
   2   This file is part of drd, a thread error detector.
   3
   4   Copyright (C) 2006-2017 Bart Van Assche <bvanassche@acm.org>.
   5
   6   This program is free software; you can redistribute it and/or
   7   modify it under the terms of the GNU General Public License as
   8   published by the Free Software Foundation; either version 2 of the
   9   License, or (at your option) any later version.
  10
  11   This program is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with this program; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19   02111-1307, USA.
  20
  21   The GNU General Public License is contained in the file COPYING.
  22 */
  23
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include "pub_tool_clreq.h"
  27 #include "drd.h"
  28 #include "pub_tool_redir.h"
  29
  30 /*
  31  * On Mac OS X shared library functions are lazily bound. The binding mechanism
  32  * uses self-modifying code. Intercept fastBindLazySymbol() in order to suppress
  33  * the data accesses involved in this mechanism.
  34  *
  35  * See also the Mac OS X ABI Dynamic Loader Reference (http://developer.apple.com/library/mac/#documentation/DeveloperTools/Reference/MachOReference/Reference/reference.html#//apple_ref/c/func/dyld_stub_binding_helper).
  36  * See also the dyld_stub_binder() source code (http://www.opensource.apple.com/source/dyld/dyld-132.13/src/dyld_stub_binder.s).
  37  * See also the dyld::fastBindLazySymbol() source code (http://opensource.apple.com/source/dyld/dyld-132.13/src/dyld.cpp).
  38  */
  39 void* VG_WRAP_FUNCTION_ZZ(dyld, ZuZZN4dyld18fastBindLazySymbolEPP11ImageLoaderm)
  40      (void** imageLoaderCache, uintptr_t lazyBindingInfoOffset);
  41 void* VG_WRAP_FUNCTION_ZZ(dyld, ZuZZN4dyld18fastBindLazySymbolEPP11ImageLoaderm)
  42      (void** imageLoaderCache, uintptr_t lazyBindingInfoOffset)
  43 {
  44    void* res;
  45    OrigFn fn;
  46
  47    VALGRIND_GET_ORIG_FN(fn);
  48
  49    ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN();
  50    CALL_FN_W_WW(res, fn, imageLoaderCache, lazyBindingInfoOffset);
  51    ANNOTATE_IGNORE_READS_AND_WRITES_END();
  52
  53    return res;
  54 }