Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/lib/interception/interception_linux.h

@@ -0,0 +1,50 @@
+//===-- interception_linux.h ------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// Linux-specific interception methods.
+//===----------------------------------------------------------------------===//
+
+#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
+    SANITIZER_SOLARIS
+
+#if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
+# error "interception_linux.h should be included from interception library only"
+#endif
+
+#ifndef INTERCEPTION_LINUX_H
+#define INTERCEPTION_LINUX_H
+
+namespace __interception {
+// returns true if a function with the given name was found.
+bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
+    uptr real, uptr wrapper);
+void *GetFuncAddrVer(const char *func_name, const char *ver);
+}  // namespace __interception
+
+#define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)                          \
+  ::__interception::GetRealFunctionAddress(                                \
+      #func, (::__interception::uptr *)&__interception::PTR_TO_REAL(func), \
+      (::__interception::uptr) & (func),                                   \
+      (::__interception::uptr) & WRAP(func))
+
+// Android and Solaris do not have dlvsym
+#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS
+#define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
+  (::__interception::real_##func = (func##_f)(                \
+       unsigned long)::__interception::GetFuncAddrVer(#func, symver))
+#else
+#define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
+  INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
+#endif  // !SANITIZER_ANDROID && !SANITIZER_SOLARIS
+
+#endif  // INTERCEPTION_LINUX_H
+#endif  // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
+        // SANITIZER_SOLARIS