Fix temp port file path generation in lldb-platform.

[ovyalov]

Summary

Fix temp port file path generation in lldb-platform - use createUniqueFile in order to create a temp file in a specific directory.

[ovyalov]

Files:

/lldb/trunk/tools/lldb-server/lldb-platform.cpp

Users:

ovyalov (Author)

http://reviews.llvm.org/rL242182

tools/lldb-server/lldb-platform.cpp

 {
     fprintf(stderr, "Usage:\n  %s %s [--log-file log-file-name] [--log-channels log-channel-list] [--port-file port-file-path] --server --listen port\n", progname, subcommand);
     exit(0);
 }
 
 static Error
 save_port_to_file(const uint16_t port, const FileSpec &port_file_spec)
 {
-    const ConstString& port_file_dir = port_file_spec.GetDirectory();
-    auto error = FileSystem::MakeDirectory(
-        FileSpec(port_file_dir.AsCString(), false), eFilePermissionsDirectoryDefault);
+    FileSpec temp_file_spec(port_file_spec.GetDirectory().AsCString(), false);
+    auto error = FileSystem::MakeDirectory(temp_file_spec, eFilePermissionsDirectoryDefault);
     if (error.Fail())
-       return Error("Failed to create directory %s: %s", port_file_dir.AsCString(), error.AsCString());
+       return Error("Failed to create directory %s: %s", temp_file_spec.GetCString(), error.AsCString());
 
     llvm::SmallString<PATH_MAX> temp_file_path;
-    auto err_code = llvm::sys::fs::createTemporaryFile(
-        port_file_spec.GetPath().c_str(), "", temp_file_path);
+    temp_file_spec.AppendPathComponent("port-file.%%%%%%");
+    auto err_code = llvm::sys::fs::createUniqueFile(temp_file_spec.GetCString(), temp_file_path);
     if (err_code)
         return Error("Failed to create temp file: %s", err_code.message().c_str());
 
     llvm::FileRemover tmp_file_remover(temp_file_path.c_str());
 
     {
         std::ofstream temp_file(temp_file_path.c_str(), std::ios::out);
         if (!temp_file.is_open())