libsanitizer/interception/interception_linux.h

   1 //===-- interception_linux.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 // Linux-specific interception methods.
  11 //===----------------------------------------------------------------------===//
  12
  13 #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
  14     SANITIZER_OPENBSD || SANITIZER_SOLARIS
  15
  16 #if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
  17 # error "interception_linux.h should be included from interception library only"
  18 #endif
  19
  20 #ifndef INTERCEPTION_LINUX_H
  21 #define INTERCEPTION_LINUX_H
  22
  23 namespace __interception {
  24 // returns true if a function with the given name was found.
  25 bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
  26     uptr real, uptr wrapper);
  27 void *GetFuncAddrVer(const char *func_name, const char *ver);
  28 }  // namespace __interception
  29
  30 #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)                          \
  31   ::__interception::GetRealFunctionAddress(                                \
  32       #func, (::__interception::uptr *)&__interception::PTR_TO_REAL(func), \
  33       (::__interception::uptr) & (func),                                   \
  34       (::__interception::uptr) & WRAP(func))
  35
  36 // Android,  Solaris and OpenBSD do not have dlvsym
  37 #if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD
  38 #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
  39   (::__interception::real_##func = (func##_type)(                \
  40        unsigned long)::__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  // !SANITIZER_ANDROID && !SANITIZER_SOLARIS
  45
  46 #endif  // INTERCEPTION_LINUX_H
  47 #endif  // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
  48         // SANITIZER_OPENBSD || SANITIZER_SOLARIS