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581d79a440
Summary: This patch adds basic support for reading minidump files. It contains the definitions of various important minidump data structures (header, stream directory), and of one minidump stream (SystemInfo). The ability to read other streams will be added in follow-up patches. However, all streams can be read even now as raw data, which means lldb's minidump support (where this code is taken from) can be immediately rebased on top of this patch as soon as it lands. As we don't have any support for generating minidump files (yet), this tests the code via unit tests with some small handcrafted binaries in the form of c char arrays. Reviewers: Bigcheese, jhenderson, zturner Subscribers: srhines, dschuff, mgorny, fedor.sergeev, lemo, clayborg, JDevlieghere, aprantl, lldb-commits, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59291 llvm-svn: 356652
107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
//===- Binary.cpp - A generic binary file ---------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the Binary class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/Binary.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/Magic.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/Error.h"
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#include "llvm/Object/MachOUniversal.h"
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#include "llvm/Object/Minidump.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Object/WindowsResource.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <algorithm>
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#include <memory>
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#include <system_error>
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using namespace llvm;
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using namespace object;
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Binary::~Binary() = default;
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Binary::Binary(unsigned int Type, MemoryBufferRef Source)
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: TypeID(Type), Data(Source) {}
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StringRef Binary::getData() const { return Data.getBuffer(); }
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StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
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MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
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Expected<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
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LLVMContext *Context) {
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file_magic Type = identify_magic(Buffer.getBuffer());
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switch (Type) {
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case file_magic::archive:
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return Archive::create(Buffer);
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case file_magic::elf:
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case file_magic::elf_relocatable:
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case file_magic::elf_executable:
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case file_magic::elf_shared_object:
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case file_magic::elf_core:
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case file_magic::macho_object:
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case file_magic::macho_executable:
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case file_magic::macho_fixed_virtual_memory_shared_lib:
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case file_magic::macho_core:
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case file_magic::macho_preload_executable:
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case file_magic::macho_dynamically_linked_shared_lib:
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case file_magic::macho_dynamic_linker:
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case file_magic::macho_bundle:
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case file_magic::macho_dynamically_linked_shared_lib_stub:
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case file_magic::macho_dsym_companion:
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case file_magic::macho_kext_bundle:
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case file_magic::coff_object:
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case file_magic::coff_import_library:
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case file_magic::pecoff_executable:
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case file_magic::bitcode:
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case file_magic::wasm_object:
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return ObjectFile::createSymbolicFile(Buffer, Type, Context);
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case file_magic::macho_universal_binary:
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return MachOUniversalBinary::create(Buffer);
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case file_magic::windows_resource:
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return WindowsResource::createWindowsResource(Buffer);
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case file_magic::pdb:
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// PDB does not support the Binary interface.
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return errorCodeToError(object_error::invalid_file_type);
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case file_magic::unknown:
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case file_magic::coff_cl_gl_object:
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// Unrecognized object file format.
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return errorCodeToError(object_error::invalid_file_type);
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case file_magic::minidump:
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return MinidumpFile::create(Buffer);
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}
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llvm_unreachable("Unexpected Binary File Type");
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}
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Expected<OwningBinary<Binary>> object::createBinary(StringRef Path) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
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/*RequiresNullTerminator=*/false);
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if (std::error_code EC = FileOrErr.getError())
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return errorCodeToError(EC);
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std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
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Expected<std::unique_ptr<Binary>> BinOrErr =
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createBinary(Buffer->getMemBufferRef());
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if (!BinOrErr)
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return BinOrErr.takeError();
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std::unique_ptr<Binary> &Bin = BinOrErr.get();
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return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
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}
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