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//===- InputFiles.h ---------------------------------------------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_WASM_INPUT_FILES_H
#define LLD_WASM_INPUT_FILES_H
#include "lld/Common/LLVM.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/Wasm.h"
#include "llvm/Support/MemoryBuffer.h"
#include "WriterUtils.h"
#include <vector>
using llvm::object::Archive;
using llvm::object::WasmObjectFile;
using llvm::object::WasmSection;
using llvm::object::WasmSymbol;
using llvm::wasm::WasmImport;
namespace lld {
namespace wasm {
class Symbol;
class InputSegment;
class InputFile {
public:
enum Kind {
ObjectKind,
ArchiveKind,
};
virtual ~InputFile() {}
// Returns the filename.
StringRef getName() const { return MB.getBufferIdentifier(); }
// Reads a file (the constructor doesn't do that).
virtual void parse() = 0;
Kind kind() const { return FileKind; }
// An archive file name if this file is created from an archive.
StringRef ParentName;
protected:
InputFile(Kind K, MemoryBufferRef M) : MB(M), FileKind(K) {}
MemoryBufferRef MB;
private:
const Kind FileKind;
};
// .a file (ar archive)
class ArchiveFile : public InputFile {
public:
explicit ArchiveFile(MemoryBufferRef M) : InputFile(ArchiveKind, M) {}
static bool classof(const InputFile *F) { return F->kind() == ArchiveKind; }
void addMember(const Archive::Symbol *Sym);
void parse() override;
private:
std::unique_ptr<Archive> File;
llvm::DenseSet<uint64_t> Seen;
};
// .o file (wasm object file)
class ObjFile : public InputFile {
public:
explicit ObjFile(MemoryBufferRef M) : InputFile(ObjectKind, M) {}
static bool classof(const InputFile *F) { return F->kind() == ObjectKind; }
void parse() override;
// Returns the underlying wasm file.
const WasmObjectFile *getWasmObj() const { return WasmObj.get(); }
void dumpInfo() const;
uint32_t relocateTypeIndex(uint32_t Original) const;
uint32_t relocateFunctionIndex(uint32_t Original) const;
uint32_t relocateGlobalIndex(uint32_t Original) const;
uint32_t relocateTableIndex(uint32_t Original) const;
uint32_t getRelocatedAddress(uint32_t Index) const;
// Returns true if the given function index is an imported function,
// as opposed to the locally defined function.
bool isImportedFunction(uint32_t Index) const;
size_t NumFunctionImports() const { return FunctionImports; }
size_t NumGlobalImports() const { return GlobalImports; }
int32_t FunctionIndexOffset = 0;
const WasmSection *CodeSection = nullptr;
std::vector<OutputRelocation> CodeRelocations;
int32_t CodeOffset = 0;
const WasmSection *DataSection = nullptr;
std::vector<uint32_t> TypeMap;
std::vector<InputSegment *> Segments;
ArrayRef<Symbol *> getSymbols() { return Symbols; }
ArrayRef<Symbol *> getTableSymbols() { return TableSymbols; }
private:
Symbol *createDefined(const WasmSymbol &Sym,
const InputSegment *Segment = nullptr);
Symbol *createUndefined(const WasmSymbol &Sym);
void initializeSymbols();
InputSegment *getSegment(const WasmSymbol &WasmSym);
Symbol *getFunctionSymbol(uint32_t FunctionIndex) const;
Symbol *getTableSymbol(uint32_t TableIndex) const;
Symbol *getGlobalSymbol(uint32_t GlobalIndex) const;
// List of all symbols referenced or defined by this file.
std::vector<Symbol *> Symbols;
// List of all function symbols indexed by the function index space
std::vector<Symbol *> FunctionSymbols;
// List of all global symbols indexed by the global index space
std::vector<Symbol *> GlobalSymbols;
// List of all indirect symbols indexed by table index space.
std::vector<Symbol *> TableSymbols;
uint32_t GlobalImports = 0;
uint32_t FunctionImports = 0;
std::unique_ptr<WasmObjectFile> WasmObj;
};
// Opens a given file.
llvm::Optional<MemoryBufferRef> readFile(StringRef Path);
} // namespace wasm
std::string toString(const wasm::InputFile *File);
} // namespace lld
#endif
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