drd/drd_darwin_intercepts.c

   1 /*
   2   This file is part of drd, a thread error detector.
   3
   4   Copyright (C) 2006-2020 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, see <http://www.gnu.org/licenses/>.
  18
  19   The GNU General Public License is contained in the file COPYING.
  20 */
  21
  22 #include <stdint.h>
  23 #include <stdio.h>
  24 #include "pub_tool_clreq.h"
  25 #include "drd.h"
  26 #include "pub_tool_redir.h"
  27
  28 /*
  29  * On Mac OS X shared library functions are lazily bound. The binding mechanism
  30  * uses self-modifying code. Intercept fastBindLazySymbol() in order to suppress
  31  * the data accesses involved in this mechanism.
  32  *
  33  * 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).
  34  * See also the dyld_stub_binder() source code (http://www.opensource.apple.com/source/dyld/dyld-132.13/src/dyld_stub_binder.s).
  35  * See also the dyld::fastBindLazySymbol() source code (http://opensource.apple.com/source/dyld/dyld-132.13/src/dyld.cpp).
  36  */
  37 void* VG_WRAP_FUNCTION_ZZ(dyld, ZuZZN4dyld18fastBindLazySymbolEPP11ImageLoaderm)
  38      (void** imageLoaderCache, uintptr_t lazyBindingInfoOffset);
  39 void* VG_WRAP_FUNCTION_ZZ(dyld, ZuZZN4dyld18fastBindLazySymbolEPP11ImageLoaderm)
  40      (void** imageLoaderCache, uintptr_t lazyBindingInfoOffset)
  41 {
  42    void* res;
  43    OrigFn fn;
  44
  45    VALGRIND_GET_ORIG_FN(fn);
  46
  47    ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN();
  48    CALL_FN_W_WW(res, fn, imageLoaderCache, lazyBindingInfoOffset);
  49    ANNOTATE_IGNORE_READS_AND_WRITES_END();
  50
  51    return res;
  52 }