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//===- MCSymbolWasm.h - ----------------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCSYMBOLWASM_H
#define LLVM_MC_MCSYMBOLWASM_H
#include "llvm/BinaryFormat/Wasm.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCSymbolTableEntry.h"
namespace llvm {
class MCSymbolWasm : public MCSymbol {
std::optional<wasm::WasmSymbolType> Type;
bool IsWeak = false;
bool IsHidden = false;
bool IsComdat = false;
bool OmitFromLinkingSection = false;
mutable bool IsUsedInInitArray = false;
mutable bool IsUsedInGOT = false;
std::optional<StringRef> ImportModule;
std::optional<StringRef> ImportName;
std::optional<StringRef> ExportName;
wasm::WasmSignature *Signature = nullptr;
std::optional<wasm::WasmGlobalType> GlobalType;
std::optional<wasm::WasmTableType> TableType;
/// An expression describing how to calculate the size of a symbol. If a
/// symbol has no size this field will be NULL.
const MCExpr *SymbolSize = nullptr;
public:
MCSymbolWasm(const MCSymbolTableEntry *Name, bool isTemporary)
: MCSymbol(SymbolKindWasm, Name, isTemporary) {}
static bool classof(const MCSymbol *S) { return S->isWasm(); }
const MCExpr *getSize() const { return SymbolSize; }
void setSize(const MCExpr *SS) { SymbolSize = SS; }
bool isFunction() const { return Type == wasm::WASM_SYMBOL_TYPE_FUNCTION; }
// Data is the default value if not set.
bool isData() const { return !Type || Type == wasm::WASM_SYMBOL_TYPE_DATA; }
bool isGlobal() const { return Type == wasm::WASM_SYMBOL_TYPE_GLOBAL; }
bool isTable() const { return Type == wasm::WASM_SYMBOL_TYPE_TABLE; }
bool isSection() const { return Type == wasm::WASM_SYMBOL_TYPE_SECTION; }
bool isTag() const { return Type == wasm::WASM_SYMBOL_TYPE_TAG; }
std::optional<wasm::WasmSymbolType> getType() const { return Type; }
void setType(wasm::WasmSymbolType type) { Type = type; }
bool isExported() const {
return getFlags() & wasm::WASM_SYMBOL_EXPORTED;
}
void setExported() const {
modifyFlags(wasm::WASM_SYMBOL_EXPORTED, wasm::WASM_SYMBOL_EXPORTED);
}
bool isNoStrip() const {
return getFlags() & wasm::WASM_SYMBOL_NO_STRIP;
}
void setNoStrip() const {
modifyFlags(wasm::WASM_SYMBOL_NO_STRIP, wasm::WASM_SYMBOL_NO_STRIP);
}
bool isTLS() const { return getFlags() & wasm::WASM_SYMBOL_TLS; }
void setTLS() const {
modifyFlags(wasm::WASM_SYMBOL_TLS, wasm::WASM_SYMBOL_TLS);
}
bool isWeak() const { return IsWeak; }
void setWeak(bool isWeak) { IsWeak = isWeak; }
bool isHidden() const { return IsHidden; }
void setHidden(bool isHidden) { IsHidden = isHidden; }
bool isComdat() const { return IsComdat; }
void setComdat(bool isComdat) { IsComdat = isComdat; }
// wasm-ld understands a finite set of symbol types. This flag allows the
// compiler to avoid emitting symbol table entries that would confuse the
// linker, unless the user specifically requests the feature.
bool omitFromLinkingSection() const { return OmitFromLinkingSection; }
void setOmitFromLinkingSection() { OmitFromLinkingSection = true; }
bool hasImportModule() const { return ImportModule.has_value(); }
StringRef getImportModule() const {
if (ImportModule)
return *ImportModule;
// Use a default module name of "env" for now, for compatibility with
// existing tools.
// TODO(sbc): Find a way to specify a default value in the object format
// without picking a hardcoded value like this.
return "env";
}
void setImportModule(StringRef Name) { ImportModule = Name; }
bool hasImportName() const { return ImportName.has_value(); }
StringRef getImportName() const {
if (ImportName)
return *ImportName;
return getName();
}
void setImportName(StringRef Name) { ImportName = Name; }
bool hasExportName() const { return ExportName.has_value(); }
StringRef getExportName() const { return *ExportName; }
void setExportName(StringRef Name) { ExportName = Name; }
bool isFunctionTable() const {
return isTable() && hasTableType() &&
getTableType().ElemType == wasm::ValType::FUNCREF;
}
void setFunctionTable(bool is64) {
setType(wasm::WASM_SYMBOL_TYPE_TABLE);
uint8_t flags =
is64 ? wasm::WASM_LIMITS_FLAG_IS_64 : wasm::WASM_LIMITS_FLAG_NONE;
setTableType(wasm::ValType::FUNCREF, flags);
}
void setUsedInGOT() const { IsUsedInGOT = true; }
bool isUsedInGOT() const { return IsUsedInGOT; }
void setUsedInInitArray() const { IsUsedInInitArray = true; }
bool isUsedInInitArray() const { return IsUsedInInitArray; }
const wasm::WasmSignature *getSignature() const { return Signature; }
void setSignature(wasm::WasmSignature *Sig) { Signature = Sig; }
const wasm::WasmGlobalType &getGlobalType() const {
assert(GlobalType);
return *GlobalType;
}
void setGlobalType(wasm::WasmGlobalType GT) { GlobalType = GT; }
bool hasTableType() const { return TableType.has_value(); }
const wasm::WasmTableType &getTableType() const {
assert(hasTableType());
return *TableType;
}
void setTableType(wasm::WasmTableType TT) { TableType = TT; }
void setTableType(wasm::ValType VT,
uint8_t flags = wasm::WASM_LIMITS_FLAG_NONE) {
// Declare a table with element type VT and no limits (min size 0, no max
// size).
wasm::WasmLimits Limits = {flags, 0, 0};
setTableType({VT, Limits});
}
};
} // end namespace llvm
#endif // LLVM_MC_MCSYMBOLWASM_H
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