1//===-- interception_linux.h ------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of AddressSanitizer, an address sanity checker.
10//
11// Linux-specific interception methods.
12//===----------------------------------------------------------------------===//
13
14#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
15 SANITIZER_SOLARIS || SANITIZER_HAIKU
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
24namespace __interception {
25bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func,
26 uptr trampoline);
27bool InterceptFunction(const char *name, const char *ver, uptr *ptr_to_real,
28 uptr func, uptr trampoline);
29} // namespace __interception
30
31// Cast func to type of REAL(func) before casting to uptr in case it is an
32// overloaded function, which is the case for some glibc functions when
33// _FORTIFY_SOURCE is used. This disambiguates which overload to use.
34#define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) \
35 ::__interception::InterceptFunction( \
36 #func, (::__interception::uptr *)&REAL(func), \
37 (::__interception::uptr)(decltype(REAL(func)))&(func), \
38 (::__interception::uptr) &TRAMPOLINE(func))
39
40// dlvsym is a GNU extension supported by some other platforms.
41#if SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD
42#define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
43 ::__interception::InterceptFunction( \
44 #func, symver, \
45 (::__interception::uptr *)&REAL(func), \
46 (::__interception::uptr)(decltype(REAL(func)))&(func), \
47 (::__interception::uptr)&TRAMPOLINE(func))
48#else
49#define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
50 INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
51#endif // SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD
52
53#endif // INTERCEPTION_LINUX_H
54#endif // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
55 // SANITIZER_SOLARIS || SANITIZER_HAIKU
56