1 files changed, 47 insertions, 0 deletions
diff --git a/libsanitizer/interception/interception_mac.h b/libsanitizer/interception/interception_mac.h
new file mode 100644
index 00000000000..244b457d738
--- /dev/null
+++ b/libsanitizer/interception/interception_mac.h
@@ -0,0 +1,47 @@
+//===-- interception_mac.h --------------------------------------*- C++ -*-===//
+//
+// 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(uptr old_func, uptr new_func, uptr *orig_old_func);
+}  // namespace __interception
+
+# define OVERRIDE_FUNCTION_MAC(old_func, new_func) \
+    ::__interception::OverrideFunction( \
+          (::__interception::uptr)old_func, \
+          (::__interception::uptr)new_func, \
+          (::__interception::uptr*)((::__interception::uptr)&REAL(old_func)))
+# define INTERCEPT_FUNCTION_MAC(func) OVERRIDE_FUNCTION_MAC(func, WRAP(func))
+
+#endif  // INTERCEPTION_MAC_H
+#endif  // __APPLE__