libsanitizer/interception/interception_mac.h

   1 //===-- interception_mac.h --------------------------------------*- C++ -*-===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of AddressSanitizer, an address sanity checker.
   9 //
  10 // Mac-specific interception methods.
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifdef __APPLE__
  14
  15 #if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
  16 # error "interception_mac.h should be included from interception.h only"
  17 #endif
  18
  19 #ifndef INTERCEPTION_MAC_H
  20 #define INTERCEPTION_MAC_H
  21
  22 #include <mach/mach_error.h>
  23 #include <stddef.h>
  24
  25 // Allocate memory for the escape island. This cannot be moved to
  26 // mach_override, because each user of interceptors may specify its
  27 // own memory range for escape islands.
  28 extern "C" {
  29 mach_error_t __interception_allocate_island(void **ptr, size_t unused_size,
  30                                             void *unused_hint);
  31 mach_error_t __interception_deallocate_island(void *ptr);
  32 }  // extern "C"
  33
  34 namespace __interception {
  35 // returns true if the old function existed.
  36 bool OverrideFunction(uptr old_func, uptr new_func, uptr *orig_old_func);
  37 }  // namespace __interception
  38
  39 # define OVERRIDE_FUNCTION_MAC(old_func, new_func) \
  40     ::__interception::OverrideFunction( \
  41           (::__interception::uptr)old_func, \
  42           (::__interception::uptr)new_func, \
  43           (::__interception::uptr*)((::__interception::uptr)&REAL(old_func)))
  44 # define INTERCEPT_FUNCTION_MAC(func) OVERRIDE_FUNCTION_MAC(func, WRAP(func))
  45
  46 #endif  // INTERCEPTION_MAC_H
  47 #endif  // __APPLE__