[asan] move lib/asan/interception to lib/interception so that other tools (e.g. tsan) can use it

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@156816 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/interception/interception_mac.h b/lib/interception/interception_mac.h
new file mode 100644
index 00000000..224d961e
--- /dev/null
+++ b/lib/interception/interception_mac.h
@@ -0,0 +1,47 @@
+//===-- interception_mac.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.
+//
+// Mac-specific interception methods.
+//===----------------------------------------------------------------------===//
+
+#ifdef __APPLE__
+
+#if !defined(INCLUDED_FROM_INTERCEPTION_LIB)
+# error "interception_mac.h should be included from interception.h only"
+#endif
+
+#ifndef INTERCEPTION_MAC_H
+#define INTERCEPTION_MAC_H
+
+#include <mach/mach_error.h>
+#include <stddef.h>
+
+// Allocate memory for the escape island. This cannot be moved to
+// mach_override, because each user of interceptors may specify its
+// own memory range for escape islands.
+extern "C" {
+mach_error_t __interception_allocate_island(void **ptr, size_t unused_size,
+                                            void *unused_hint);
+mach_error_t __interception_deallocate_island(void *ptr);
+}  // extern "C"
+
+namespace __interception {
+// returns true if the old function existed.
+bool OverrideFunction(void *old_func, void *new_func, void **orig_old_func);
+}  // namespace __interception
+
+# define OVERRIDE_FUNCTION_MAC(old_func, new_func) \
+    ::__interception::OverrideFunction((void*)old_func, (void*)new_func, \
+                                       (void**)&REAL(old_func))
+# define INTERCEPT_FUNCTION_MAC(func) OVERRIDE_FUNCTION_MAC(func, WRAP(func))
+
+#endif  // INTERCEPTION_MAC_H
+#endif  // __APPLE__