libsanitizer/interception/interception_linux.cc

   1 //===-- interception_linux.cc -----------------------------------*- 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 defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
  14 #include "interception.h"
  15
  16 #include <dlfcn.h>   // for dlsym() and dlvsym()
  17
  18 #ifdef __NetBSD__
  19 #include "sanitizer_common/sanitizer_libc.h"
  20 #endif
  21
  22 namespace __interception {
  23 bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
  24     uptr real, uptr wrapper) {
  25 #ifdef __NetBSD__
  26   // XXX: Find a better way to handle renames
  27   if (internal_strcmp(func_name, "sigaction") == 0) func_name = "__sigaction14";
  28 #endif
  29   *func_addr = (uptr)dlsym(RTLD_NEXT, func_name);
  30   return real == wrapper;
  31 }
  32
  33 #if !defined(__ANDROID__)  // android does not have dlvsym
  34 void *GetFuncAddrVer(const char *func_name, const char *ver) {
  35   return dlvsym(RTLD_NEXT, func_name, ver);
  36 }
  37 #endif  // !defined(__ANDROID__)
  38
  39 }  // namespace __interception
  40
  41 #endif  // __linux__ || __FreeBSD__ || __NetBSD__