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      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##_type)(                \
     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
     51