commit 16937d08ad8cc9225fd54b0caa282c84bc523947
author Andrew Walbran <qwandor@google.com> Tue Oct 22 13:54:20 2019 +0100
committer Andrew Walbran <qwandor@google.com> Tue Oct 22 14:05:33 2019 +0100
tree 4a23cf37bbaf0ebfc1e57f19e64ebcc423b49a30
parent 52c2969f621c443130e93da7ae16eea8d8fe620b

Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be

linux-x64/clang/include/llvm/Support/FileSystem.h

diff --git a/linux-x64/clang/include/llvm/Support/FileSystem.h b/linux-x64/clang/include/llvm/Support/FileSystem.h
index a76eab6..156250f 100644
--- a/linux-x64/clang/include/llvm/Support/FileSystem.h
+++ b/linux-x64/clang/include/llvm/Support/FileSystem.h
@@ -1,9 +1,8 @@
 //===- llvm/Support/FileSystem.h - File System OS Concept -------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -160,6 +159,8 @@
   #if defined(LLVM_ON_UNIX)
   time_t fs_st_atime = 0;
   time_t fs_st_mtime = 0;
+  uint32_t fs_st_atime_nsec = 0;
+  uint32_t fs_st_mtime_nsec = 0;
   uid_t fs_st_uid = 0;
   gid_t fs_st_gid = 0;
   off_t fs_st_size = 0;
@@ -180,9 +181,12 @@
   explicit basic_file_status(file_type Type) : Type(Type) {}
 
   #if defined(LLVM_ON_UNIX)
-  basic_file_status(file_type Type, perms Perms, time_t ATime, time_t MTime,
+  basic_file_status(file_type Type, perms Perms, time_t ATime,
+                    uint32_t ATimeNSec, time_t MTime, uint32_t MTimeNSec,
                     uid_t UID, gid_t GID, off_t Size)
-      : fs_st_atime(ATime), fs_st_mtime(MTime), fs_st_uid(UID), fs_st_gid(GID),
+      : fs_st_atime(ATime), fs_st_mtime(MTime),
+        fs_st_atime_nsec(ATimeNSec), fs_st_mtime_nsec(MTimeNSec),
+        fs_st_uid(UID), fs_st_gid(GID),
         fs_st_size(Size), Type(Type), Perms(Perms) {}
 #elif defined(_WIN32)
   basic_file_status(file_type Type, perms Perms, uint32_t LastAccessTimeHigh,
@@ -199,7 +203,20 @@
   // getters
   file_type type() const { return Type; }
   perms permissions() const { return Perms; }
+
+  /// The file access time as reported from the underlying file system.
+  ///
+  /// Also see comments on \c getLastModificationTime() related to the precision
+  /// of the returned value.
   TimePoint<> getLastAccessedTime() const;
+
+  /// The file modification time as reported from the underlying file system.
+  ///
+  /// The returned value allows for nanosecond precision but the actual
+  /// resolution is an implementation detail of the underlying file system.
+  /// There is no guarantee for what kind of resolution you can expect, the
+  /// resolution can differ across platforms and even across mountpoints on the
+  /// same machine.
   TimePoint<> getLastModificationTime() const;
 
   #if defined(LLVM_ON_UNIX)
@@ -247,8 +264,11 @@
 
   #if defined(LLVM_ON_UNIX)
   file_status(file_type Type, perms Perms, dev_t Dev, nlink_t Links, ino_t Ino,
-              time_t ATime, time_t MTime, uid_t UID, gid_t GID, off_t Size)
-      : basic_file_status(Type, Perms, ATime, MTime, UID, GID, Size),
+              time_t ATime, uint32_t ATimeNSec,
+              time_t MTime, uint32_t MTimeNSec,
+              uid_t UID, gid_t GID, off_t Size)
+      : basic_file_status(Type, Perms, ATime, ATimeNSec, MTime, MTimeNSec,
+                          UID, GID, Size),
         fs_st_dev(Dev), fs_st_nlinks(Links), fs_st_ino(Ino) {}
   #elif defined(_WIN32)
   file_status(file_type Type, perms Perms, uint32_t LinkCount,
@@ -281,10 +301,7 @@
 /// relative/../path => <current-directory>/relative/../path
 ///
 /// @param path A path that is modified to be an absolute path.
-/// @returns errc::success if \a path has been made absolute, otherwise a
-///          platform-specific error_code.
-std::error_code make_absolute(const Twine &current_directory,
-                              SmallVectorImpl<char> &path);
+void make_absolute(const Twine &current_directory, SmallVectorImpl<char> &path);
 
 /// Make \a path an absolute path.
 ///
@@ -349,6 +366,12 @@
 std::error_code real_path(const Twine &path, SmallVectorImpl<char> &output,
                           bool expand_tilde = false);
 
+/// Expands ~ expressions to the user's home directory. On Unix ~user
+/// directories are resolved as well.
+///
+/// @param path The path to resolve.
+void expand_tilde(const Twine &path, SmallVectorImpl<char> &output);
+
 /// Get the current path.
 ///
 /// @param result Holds the current path on return.