forked from OSchip/llvm-project
56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
//===-- interception_linux.cc -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// Linux-specific interception methods.
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//===----------------------------------------------------------------------===//
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#include "interception.h"
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#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
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SANITIZER_SOLARIS
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#include <dlfcn.h> // for dlsym() and dlvsym()
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#if SANITIZER_NETBSD
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#include "sanitizer_common/sanitizer_libc.h"
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#endif
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namespace __interception {
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bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
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uptr real, uptr wrapper) {
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#if SANITIZER_NETBSD
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// XXX: Find a better way to handle renames
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if (internal_strcmp(func_name, "sigaction") == 0) func_name = "__sigaction14";
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#endif
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*func_addr = (uptr)dlsym(RTLD_NEXT, func_name);
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if (!*func_addr) {
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// If the lookup using RTLD_NEXT failed, the sanitizer runtime library is
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// later in the library search order than the DSO that we are trying to
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// intercept, which means that we cannot intercept this function. We still
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// want the address of the real definition, though, so look it up using
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// RTLD_DEFAULT.
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*func_addr = (uptr)dlsym(RTLD_DEFAULT, func_name);
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}
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return real == wrapper;
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}
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// Android and Solaris do not have dlvsym
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#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS
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void *GetFuncAddrVer(const char *func_name, const char *ver) {
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return dlvsym(RTLD_NEXT, func_name, ver);
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}
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#endif // !SANITIZER_ANDROID
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} // namespace __interception
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#endif // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
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// SANITIZER_SOLARIS
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