2017-11-18 02:14:09 +08:00
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//===- Symbols.h ------------------------------------------------*- C++ -*-===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_WASM_SYMBOLS_H
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#define LLD_WASM_SYMBOLS_H
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#include "lld/Common/LLVM.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/Wasm.h"
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using llvm::object::Archive;
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2017-12-01 10:11:29 +08:00
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using llvm::wasm::WasmSignature;
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2017-11-18 02:14:09 +08:00
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namespace lld {
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namespace wasm {
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class InputFile;
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class InputSegment;
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2018-01-10 07:56:44 +08:00
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class InputFunction;
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2017-11-18 02:14:09 +08:00
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class Symbol {
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public:
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enum Kind {
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DefinedFunctionKind,
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DefinedGlobalKind,
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LazyKind,
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UndefinedFunctionKind,
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UndefinedGlobalKind,
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LastDefinedKind = DefinedGlobalKind,
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InvalidKind,
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};
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2018-01-18 04:19:04 +08:00
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Symbol(StringRef Name, uint32_t Flags) : Flags(Flags), Name(Name) {}
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2017-11-18 02:14:09 +08:00
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Kind getKind() const { return SymbolKind; }
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bool isLazy() const { return SymbolKind == LazyKind; }
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bool isDefined() const { return SymbolKind <= LastDefinedKind; }
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bool isUndefined() const {
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return SymbolKind == UndefinedGlobalKind ||
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SymbolKind == UndefinedFunctionKind;
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}
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bool isFunction() const {
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return SymbolKind == DefinedFunctionKind ||
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SymbolKind == UndefinedFunctionKind;
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}
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bool isGlobal() const { return !isFunction(); }
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bool isLocal() const;
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bool isWeak() const;
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2017-12-03 10:38:04 +08:00
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bool isHidden() const;
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2017-11-18 02:14:09 +08:00
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// Returns the symbol name.
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StringRef getName() const { return Name; }
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// Returns the file from which this symbol was created.
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InputFile *getFile() const { return File; }
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2017-12-07 11:19:53 +08:00
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bool hasFunctionType() const { return FunctionType != nullptr; }
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const WasmSignature &getFunctionType() const;
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void setFunctionType(const WasmSignature *Type);
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void setHidden(bool IsHidden);
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2018-01-10 07:56:44 +08:00
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uint32_t getOutputIndex() const;
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// Returns true if an output index has been set for this symbol
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bool hasOutputIndex() const;
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// Set the output index of the symbol (in the function or global index
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// space of the output object.
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void setOutputIndex(uint32_t Index);
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2018-01-25 05:45:25 +08:00
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uint32_t getTableIndex() const;
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// Returns true if a table index has been set for this symbol
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bool hasTableIndex() const;
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// Set the table index of the symbol
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void setTableIndex(uint32_t Index);
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2018-01-09 07:39:11 +08:00
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// Returns the virtual address of a defined global.
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// Only works for globals, not functions.
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uint32_t getVirtualAddress() const;
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2017-12-06 03:05:45 +08:00
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void setVirtualAddress(uint32_t VA);
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2018-01-10 08:52:20 +08:00
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void update(Kind K, InputFile *F = nullptr, uint32_t Flags = 0,
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const InputSegment *Segment = nullptr,
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InputFunction *Function = nullptr, uint32_t Address = UINT32_MAX);
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void setArchiveSymbol(const Archive::Symbol &Sym) { ArchiveSymbol = Sym; }
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const Archive::Symbol &getArchiveSymbol() { return ArchiveSymbol; }
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InputFunction *getFunction() { return Function; }
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protected:
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uint32_t Flags;
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uint32_t VirtualAddress = 0;
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StringRef Name;
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Archive::Symbol ArchiveSymbol = {nullptr, 0, 0};
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Kind SymbolKind = InvalidKind;
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InputFile *File = nullptr;
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const InputSegment *Segment = nullptr;
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InputFunction *Function = nullptr;
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llvm::Optional<uint32_t> OutputIndex;
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llvm::Optional<uint32_t> TableIndex;
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const WasmSignature *FunctionType = nullptr;
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};
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} // namespace wasm
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// Returns a symbol name for an error message.
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2017-12-06 00:50:46 +08:00
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std::string toString(const wasm::Symbol &Sym);
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std::string toString(wasm::Symbol::Kind Kind);
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2017-11-18 02:14:09 +08:00
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} // namespace lld
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#endif
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