Rebased PNaCl localmods in LLVM to 223109

lib/Support/Unix/Path.inc

Index: lib/Support/Unix/Path.inc
diff --git a/lib/Support/Unix/Path.inc b/lib/Support/Unix/Path.inc
index 634d4049d7decbeadefcb6ccabaaa208e8f189bc..d2f11b6f04f9f76168fc1508ab65246d64b65061 100644
--- a/lib/Support/Unix/Path.inc
+++ b/lib/Support/Unix/Path.inc
@@ -193,6 +193,10 @@ std::string getMainExecutable(const char *argv0, void *MainAddr) {
   char link_path[MAXPATHLEN];
   if (realpath(DLInfo.dli_fname, link_path))
     return link_path;
+  // @LOCALMOD-BEGIN
+#elif defined(__native_client__)
+  // Nothing.
+  // @LOCALMOD-END
 #else
 #error GetMainExecutable is not implemented on this host yet.
 #endif
@@ -211,7 +215,16 @@ UniqueID file_status::getUniqueID() const {
 
 std::error_code current_path(SmallVectorImpl<char> &result) {
   result.clear();
-
+  // @LOCALMOD-START NaCl doesn't have paths, and the translator returns an
+  //                 error for getcwd below. Return a dummy path instead.
+#if defined(__native_client__)
+  result.reserve(2);
+  result.set_size(2);
+  result[0] = '/';
+  result[1] = '\0';
+  return std::error_code();
+#else // !defined(__native_client__)
+  // @LOCALMOD-END
   const char *pwd = ::getenv("PWD");
   llvm::sys::fs::file_status PWDStatus, DotStatus;
   if (pwd && llvm::sys::path::is_absolute(pwd) &&
@@ -242,6 +255,9 @@ std::error_code current_path(SmallVectorImpl<char> &result) {
 
   result.set_size(strlen(result.data()));
   return std::error_code();
+  // @LOCALMOD-START
+#endif // defined(__native_client__)
+  // @LOCALMOD-END
 }
 
 std::error_code create_directory(const Twine &path, bool IgnoreExisting) {