[Object] Add tapi files to object

Summary:
The intention for this is to allow reading and printing symbols out from
llvm-nm. Tapi file, and Tapi universal follow a similiar format to
their respective MachO Object format.

The tests are dependent on llvm-nm processing tbd files which is why its in D66160

Reviewers: ributzka, steven_wu, lhames

Reviewed By: ributzka, lhames

Subscribers: mgorny, hiraditya, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66159

llvm-svn: 369600

1 files changed, 54 insertions, 0 deletions

diff --git a/llvm/lib/Object/TapiUniversal.cpp b/llvm/lib/Object/TapiUniversal.cpp
new file mode 100644
index 00000000000..b3273e345a6
--- /dev/null
+++ b/llvm/lib/Object/TapiUniversal.cpp
@@ -0,0 +1,54 @@
+//===- TapiUniversal.cpp --------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the Text-based Dynamic Library Stub format.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/TapiUniversal.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/TextAPI/MachO/TextAPIReader.h"
+
+using namespace llvm;
+using namespace MachO;
+using namespace object;
+
+TapiUniversal::TapiUniversal(MemoryBufferRef Source, Error &Err)
+    : Binary(ID_TapiUniversal, Source) {
+  auto Result = TextAPIReader::get(Source);
+  ErrorAsOutParameter ErrAsOuParam(&Err);
+  if (!Result) {
+    Err = Result.takeError();
+    return;
+  }
+  ParsedFile = std::move(Result.get());
+
+  auto Archs = ParsedFile->getArchitectures();
+  for (auto Arch : Archs)
+    Architectures.emplace_back(Arch);
+}
+
+TapiUniversal::~TapiUniversal() = default;
+
+Expected<std::unique_ptr<TapiFile>>
+TapiUniversal::ObjectForArch::getAsObjectFile() const {
+  return std::unique_ptr<TapiFile>(new TapiFile(Parent->getMemoryBufferRef(),
+                                                *Parent->ParsedFile.get(),
+                                                Parent->Architectures[Index]));
+}
+
+Expected<std::unique_ptr<TapiUniversal>>
+TapiUniversal::create(MemoryBufferRef Source) {
+  Error Err = Error::success();
+  std::unique_ptr<TapiUniversal> Ret(new TapiUniversal(Source, Err));
+  if (Err)
+    return std::move(Err);
+  return std::move(Ret);
+}