am 876d6995: Merge "Update aosp/master LLVM for rebase to r222494."

* commit '876d6995443e99d13696f3941c3a789a4daa7c7a':
  Update aosp/master LLVM for rebase to r222494.

1 files changed, 15 insertions, 0 deletions

diff --git a/include/llvm/Support/Process.h b/include/llvm/Support/Process.h
index 30973de..8616679 100644
--- a/include/llvm/Support/Process.h
+++ b/include/llvm/Support/Process.h
@@ -186,6 +186,21 @@ public:
                     ArrayRef<const char *> ArgsFromMain,
                     SpecificBumpPtrAllocator<char> &ArgAllocator);
 
+  // This functions ensures that the standard file descriptors (input, output,
+  // and error) are properly mapped to a file descriptor before we use any of
+  // them.  This should only be called by standalone programs, library
+  // components should not call this.
+  static std::error_code FixupStandardFileDescriptors();
+
+  // This function safely closes a file descriptor.  It is not safe to retry
+  // close(2) when it returns with errno equivalent to EINTR; this is because
+  // *nixen cannot agree if the file descriptor is, in fact, closed when this
+  // occurs.
+  //
+  // N.B. Some operating systems, due to thread cancellation, cannot properly
+  // guarantee that it will or will not be closed one way or the other!
+  static std::error_code SafelyCloseFileDescriptor(int FD);
+
   /// This function determines if the standard input is connected directly
   /// to a user's input (keyboard probably), rather than coming from a file
   /// or pipe.