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diff --git a/lib/sanitizer_common/sanitizer_interface_internal.h b/lib/sanitizer_common/sanitizer_interface_internal.h
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+++ b/lib/sanitizer_common/sanitizer_interface_internal.h
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+//===-- 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