src/compiler-rt/lib/interception/interception_linux.h

   1 //===-- interception_linux.h ------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file is a part of AddressSanitizer, an address sanity checker.
  11 //
  12 // Linux-specific interception methods.
  13 //===----------------------------------------------------------------------===//
  14
  15 #if defined(__linux__) || defined(__FreeBSD__)
  16
  17 #if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
  18 # error "interception_linux.h should be included from interception library only"
  19 #endif
  20
  21 #ifndef INTERCEPTION_LINUX_H
  22 #define INTERCEPTION_LINUX_H
  23
  24 namespace __interception {
  25 // returns true if a function with the given name was found.
  26 bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
  27     uptr real, uptr wrapper);
  28 void *GetFuncAddrVer(const char *func_name, const char *ver);
  29 }  // namespace __interception
  30
  31 #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)                          \
  32   ::__interception::GetRealFunctionAddress(                                \
  33       #func, (::__interception::uptr *)&__interception::PTR_TO_REAL(func), \
  34       (::__interception::uptr) & (func),                                   \
  35       (::__interception::uptr) & WRAP(func))
  36
  37 #if !defined(__ANDROID__)  // android does not have dlvsym
  38 # define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
  39      ::__interception::real_##func = (func##_f)(unsigned long) \
  40          ::__interception::GetFuncAddrVer(#func, symver)
  41 #else
  42 # define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
  43      INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
  44 #endif  // !defined(__ANDROID__)
  45
  46 #endif  // INTERCEPTION_LINUX_H
  47 #endif  // __linux__ || __FreeBSD__