1 files changed, 5 insertions, 2 deletions
diff --git a/compiler-rt/lib/profile/InstrProfilingExtras.h b/compiler-rt/lib/profile/InstrProfilingExtras.h
index a564a15361e..1ab90cc873f 100644
--- a/compiler-rt/lib/profile/InstrProfilingExtras.h
+++ b/compiler-rt/lib/profile/InstrProfilingExtras.h
@@ -14,15 +14,18 @@
  * or if it hasn't been called, the \c LLVM_PROFILE_FILE environment variable,
  * or if that's not set, \c "default.profdata".
  */
-void __llvm_profile_write_file(void);
+int __llvm_profile_write_file(void);
 
 /*!
  * \brief Set the filename for writing instrumentation data.
  *
  * Sets the filename to be used for subsequent calls to
  * \a __llvm_profile_write_file().
+ *
+ * \c Name is not copied, so it must remain valid.  Passing NULL resets the
+ * filename logic to the default behaviour.
  */
 void __llvm_profile_set_filename(const char *Name);
 
 /*! \brief Register to write instrumentation data to file at exit. */
-void __llvm_profile_register_write_file_atexit(void);
+int __llvm_profile_register_write_file_atexit(void);