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