intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 127 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/lib/Object/SymbolicFile.cpp b/contrib/libs/llvm12/lib/Object/SymbolicFile.cpp
new file mode 100644
index 00000000000..34a2c5e1c12
--- /dev/null
+++ b/contrib/libs/llvm12/lib/Object/SymbolicFile.cpp
@@ -0,0 +1,127 @@
+//===- SymbolicFile.cpp - Interface that only provides symbols ------------===//
+//
+// 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 a file format independent SymbolicFile class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/SymbolicFile.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/BinaryFormat/Magic.h"
+#include "llvm/Object/COFFImportFile.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Object/IRObjectFile.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <algorithm>
+#include <memory>
+
+using namespace llvm;
+using namespace object;
+
+SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
+    : Binary(Type, Source) {}
+
+SymbolicFile::~SymbolicFile() = default;
+
+Expected<std::unique_ptr<SymbolicFile>>
+SymbolicFile::createSymbolicFile(MemoryBufferRef Object, file_magic Type,
+                                 LLVMContext *Context, bool InitContent) {
+  StringRef Data = Object.getBuffer();
+  if (Type == file_magic::unknown)
+    Type = identify_magic(Data);
+
+  if (!isSymbolicFile(Type, Context))
+    return errorCodeToError(object_error::invalid_file_type);
+
+  switch (Type) {
+  case file_magic::bitcode:
+    // Context is guaranteed to be non-null here, because bitcode magic only
+    // indicates a symbolic file when Context is non-null.
+    return IRObjectFile::create(Object, *Context);
+  case file_magic::elf:
+  case file_magic::elf_executable:
+  case file_magic::elf_shared_object:
+  case file_magic::elf_core:
+  case file_magic::macho_executable:
+  case file_magic::macho_fixed_virtual_memory_shared_lib:
+  case file_magic::macho_core:
+  case file_magic::macho_preload_executable:
+  case file_magic::macho_dynamically_linked_shared_lib:
+  case file_magic::macho_dynamic_linker:
+  case file_magic::macho_bundle:
+  case file_magic::macho_dynamically_linked_shared_lib_stub:
+  case file_magic::macho_dsym_companion:
+  case file_magic::macho_kext_bundle:
+  case file_magic::pecoff_executable:
+  case file_magic::xcoff_object_32:
+  case file_magic::xcoff_object_64:
+  case file_magic::wasm_object:
+    return ObjectFile::createObjectFile(Object, Type, InitContent);
+  case file_magic::coff_import_library:
+    return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
+  case file_magic::elf_relocatable:
+  case file_magic::macho_object:
+  case file_magic::coff_object: {
+    Expected<std::unique_ptr<ObjectFile>> Obj =
+        ObjectFile::createObjectFile(Object, Type, InitContent);
+    if (!Obj || !Context)
+      return std::move(Obj);
+
+    Expected<MemoryBufferRef> BCData =
+        IRObjectFile::findBitcodeInObject(*Obj->get());
+    if (!BCData) {
+      consumeError(BCData.takeError());
+      return std::move(Obj);
+    }
+
+    return IRObjectFile::create(
+        MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
+        *Context);
+  }
+  default:
+    llvm_unreachable("Unexpected Binary File Type");
+  }
+}
+
+bool SymbolicFile::isSymbolicFile(file_magic Type, const LLVMContext *Context) {
+  switch (Type) {
+  case file_magic::bitcode:
+    return Context != nullptr;
+  case file_magic::elf:
+  case file_magic::elf_executable:
+  case file_magic::elf_shared_object:
+  case file_magic::elf_core:
+  case file_magic::macho_executable:
+  case file_magic::macho_fixed_virtual_memory_shared_lib:
+  case file_magic::macho_core:
+  case file_magic::macho_preload_executable:
+  case file_magic::macho_dynamically_linked_shared_lib:
+  case file_magic::macho_dynamic_linker:
+  case file_magic::macho_bundle:
+  case file_magic::macho_dynamically_linked_shared_lib_stub:
+  case file_magic::macho_dsym_companion:
+  case file_magic::macho_kext_bundle:
+  case file_magic::pecoff_executable:
+  case file_magic::xcoff_object_32:
+  case file_magic::xcoff_object_64:
+  case file_magic::wasm_object:
+  case file_magic::coff_import_library:
+  case file_magic::elf_relocatable:
+  case file_magic::macho_object:
+  case file_magic::coff_object:
+    return true;
+  default:
+    return false;
+  }
+}