Index: lib/asan/asan_interface_internal.h
===================================================================
--- lib/asan/asan_interface_internal.h
+++ lib/asan/asan_interface_internal.h
@@ -9,8 +9,11 @@
 //
 // This file is a part of AddressSanitizer, an address sanity checker.
 //
-// This header can be included by the instrumented program to fetch
-// data (mostly allocator statistics) from ASan runtime library.
+// This header declares the AddressSanitizer runtime interface functions.
+// The runtime library has to define these functions so the instrumented program
+// could call them.
+//
+// See also include/sanitizer/asan_interface.h
 //===----------------------------------------------------------------------===//
 #ifndef ASAN_INTERFACE_INTERNAL_H
 #define ASAN_INTERFACE_INTERNAL_H
Index: lib/sanitizer_common/CMakeLists.txt
===================================================================
--- lib/sanitizer_common/CMakeLists.txt
+++ lib/sanitizer_common/CMakeLists.txt
@@ -67,6 +67,7 @@
   sanitizer_flag_parser.h
   sanitizer_flags.h
   sanitizer_flags.inc
+  sanitizer_interface_internal.h
   sanitizer_internal_defs.h
   sanitizer_lfstack.h
   sanitizer_libc.h
Index: lib/sanitizer_common/sanitizer_common.h
===================================================================
--- lib/sanitizer_common/sanitizer_common.h
+++ lib/sanitizer_common/sanitizer_common.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file is shared between AddressSanitizer and ThreadSanitizer
-// run-time libraries.
+// This file is shared between run-time libraries of sanitizers.
+//
 // It declares common functions and classes that are used in both runtimes.
 // Implementation of some functions are provided in sanitizer_common, while
 // others must be defined by run-time library itself.
@@ -17,6 +17,7 @@
 #define SANITIZER_COMMON_H
 
 #include "sanitizer_flags.h"
+#include "sanitizer_interface_internal.h"
 #include "sanitizer_internal_defs.h"
 #include "sanitizer_libc.h"
 #include "sanitizer_list.h"
Index: lib/sanitizer_common/sanitizer_interface_internal.h
===================================================================
--- lib/sanitizer_common/sanitizer_interface_internal.h
+++ lib/sanitizer_common/sanitizer_interface_internal.h
@@ -0,0 +1,58 @@
+//===-- sanitizer_interface_internal.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 shared between run-time libraries of sanitizers.
+//
+// This header declares the sanitizer runtime interface functions.
+// The runtime library has to define these functions so the instrumented program
+// could call them.
+//
+// See also include/sanitizer/common_interface_defs.h
+//===----------------------------------------------------------------------===//
+#ifndef SANITIZER_INTERFACE_INTERNAL_H
+#define SANITIZER_INTERFACE_INTERNAL_H
+
+#include "sanitizer_internal_defs.h"
+
+extern "C" {
+  // Tell the tools to write their reports to "path.<pid>" instead of stderr.
+  // The special values are "stdout" and "stderr".
+  SANITIZER_INTERFACE_ATTRIBUTE
+  void __sanitizer_set_report_path(const char *path);
+
+  typedef struct {
+      int coverage_sandboxed;
+      __sanitizer::sptr coverage_fd;
+      unsigned int coverage_max_block_size;
+  } __sanitizer_sandbox_arguments;
+
+  // Notify the tools that the sandbox is going to be turned on.
+  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void
+      __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args);
+
+  // This function is called by the tool when it has just finished reporting
+  // an error. 'error_summary' is a one-line string that summarizes
+  // the error message. This function can be overridden by the client.
+  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+  void __sanitizer_report_error_summary(const char *error_summary);
+
+  SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_dump();
+  SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_init();
+  SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov(__sanitizer::u32 *guard);
+  SANITIZER_INTERFACE_ATTRIBUTE
+  void __sanitizer_annotate_contiguous_container(const void *beg,
+                                                 const void *end,
+                                                 const void *old_mid,
+                                                 const void *new_mid);
+  SANITIZER_INTERFACE_ATTRIBUTE
+  int __sanitizer_verify_contiguous_container(const void *beg, const void *mid,
+                                              const void *end);
+}  // extern "C"
+
+#endif  // SANITIZER_INTERFACE_INTERNAL_H
Index: lib/sanitizer_common/sanitizer_internal_defs.h
===================================================================
--- lib/sanitizer_common/sanitizer_internal_defs.h
+++ lib/sanitizer_common/sanitizer_internal_defs.h
@@ -101,41 +101,6 @@
 #endif
 }  // namespace __sanitizer
 
-extern "C" {
-  // Tell the tools to write their reports to "path.<pid>" instead of stderr.
-  // The special values are "stdout" and "stderr".
-  SANITIZER_INTERFACE_ATTRIBUTE
-  void __sanitizer_set_report_path(const char *path);
-
-  typedef struct {
-      int coverage_sandboxed;
-      __sanitizer::sptr coverage_fd;
-      unsigned int coverage_max_block_size;
-  } __sanitizer_sandbox_arguments;
-
-  // Notify the tools that the sandbox is going to be turned on.
-  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void
-      __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args);
-
-  // This function is called by the tool when it has just finished reporting
-  // an error. 'error_summary' is a one-line string that summarizes
-  // the error message. This function can be overridden by the client.
-  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
-  void __sanitizer_report_error_summary(const char *error_summary);
-
-  SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_dump();
-  SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_init();
-  SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov(__sanitizer::u32 *guard);
-  SANITIZER_INTERFACE_ATTRIBUTE
-  void __sanitizer_annotate_contiguous_container(const void *beg,
-                                                 const void *end,
-                                                 const void *old_mid,
-                                                 const void *new_mid);
-  SANITIZER_INTERFACE_ATTRIBUTE
-  int __sanitizer_verify_contiguous_container(const void *beg, const void *mid,
-                                              const void *end);
-}  // extern "C"
-
 
 using namespace __sanitizer;  // NOLINT
 // ----------- ATTENTION -------------