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//===- WriterUtils.cpp ----------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "WriterUtils.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/LEB128.h"
#define DEBUG_TYPE "lld"
using namespace llvm;
using namespace llvm::wasm;
using namespace lld::wasm;
static const char *valueTypeToString(uint8_t Type) {
switch (Type) {
case WASM_TYPE_I32:
return "i32";
case WASM_TYPE_I64:
return "i64";
case WASM_TYPE_F32:
return "f32";
case WASM_TYPE_F64:
return "f64";
default:
llvm_unreachable("invalid value type");
}
}
namespace lld {
void wasm::debugWrite(uint64_t Offset, const Twine &Msg) {
LLVM_DEBUG(dbgs() << format(" | %08lld: ", Offset) << Msg << "\n");
}
void wasm::writeUleb128(raw_ostream &OS, uint32_t Number, const Twine &Msg) {
debugWrite(OS.tell(), Msg + "[" + utohexstr(Number) + "]");
encodeULEB128(Number, OS);
}
void wasm::writeSleb128(raw_ostream &OS, int32_t Number, const Twine &Msg) {
debugWrite(OS.tell(), Msg + "[" + utohexstr(Number) + "]");
encodeSLEB128(Number, OS);
}
void wasm::writeBytes(raw_ostream &OS, const char *Bytes, size_t Count,
const Twine &Msg) {
debugWrite(OS.tell(), Msg + " [data[" + Twine(Count) + "]]");
OS.write(Bytes, Count);
}
void wasm::writeStr(raw_ostream &OS, StringRef String, const Twine &Msg) {
debugWrite(OS.tell(),
Msg + " [str[" + Twine(String.size()) + "]: " + String + "]");
encodeULEB128(String.size(), OS);
OS.write(String.data(), String.size());
}
void wasm::writeU8(raw_ostream &OS, uint8_t Byte, const Twine &Msg) {
debugWrite(OS.tell(), Msg + " [0x" + utohexstr(Byte) + "]");
OS << Byte;
}
void wasm::writeU32(raw_ostream &OS, uint32_t Number, const Twine &Msg) {
debugWrite(OS.tell(), Msg + "[0x" + utohexstr(Number) + "]");
support::endian::write(OS, Number, support::little);
}
void wasm::writeValueType(raw_ostream &OS, uint8_t Type, const Twine &Msg) {
writeU8(OS, Type, Msg + "[type: " + valueTypeToString(Type) + "]");
}
void wasm::writeSig(raw_ostream &OS, const WasmSignature &Sig) {
writeU8(OS, WASM_TYPE_FUNC, "signature type");
writeUleb128(OS, Sig.ParamTypes.size(), "param Count");
for (uint8_t ParamType : Sig.ParamTypes) {
writeValueType(OS, ParamType, "param type");
}
if (Sig.ReturnType == WASM_TYPE_NORESULT) {
writeUleb128(OS, 0, "result Count");
} else {
writeUleb128(OS, 1, "result Count");
writeValueType(OS, Sig.ReturnType, "result type");
}
}
void wasm::writeInitExpr(raw_ostream &OS, const WasmInitExpr &InitExpr) {
writeU8(OS, InitExpr.Opcode, "opcode");
switch (InitExpr.Opcode) {
case WASM_OPCODE_I32_CONST:
writeSleb128(OS, InitExpr.Value.Int32, "literal (i32)");
break;
case WASM_OPCODE_I64_CONST:
writeSleb128(OS, InitExpr.Value.Int64, "literal (i64)");
break;
case WASM_OPCODE_GET_GLOBAL:
writeUleb128(OS, InitExpr.Value.Global, "literal (global index)");
break;
default:
fatal("unknown opcode in init expr: " + Twine(InitExpr.Opcode));
}
writeU8(OS, WASM_OPCODE_END, "opcode:end");
}
void wasm::writeLimits(raw_ostream &OS, const WasmLimits &Limits) {
writeU8(OS, Limits.Flags, "limits flags");
writeUleb128(OS, Limits.Initial, "limits initial");
if (Limits.Flags & WASM_LIMITS_FLAG_HAS_MAX)
writeUleb128(OS, Limits.Maximum, "limits max");
}
void wasm::writeGlobalType(raw_ostream &OS, const WasmGlobalType &Type) {
writeValueType(OS, Type.Type, "global type");
writeU8(OS, Type.Mutable, "global mutable");
}
void wasm::writeGlobal(raw_ostream &OS, const WasmGlobal &Global) {
writeGlobalType(OS, Global.Type);
writeInitExpr(OS, Global.InitExpr);
}
void wasm::writeTableType(raw_ostream &OS, const llvm::wasm::WasmTable &Type) {
writeU8(OS, WASM_TYPE_ANYFUNC, "table type");
writeLimits(OS, Type.Limits);
}
void wasm::writeImport(raw_ostream &OS, const WasmImport &Import) {
writeStr(OS, Import.Module, "import module name");
writeStr(OS, Import.Field, "import field name");
writeU8(OS, Import.Kind, "import kind");
switch (Import.Kind) {
case WASM_EXTERNAL_FUNCTION:
writeUleb128(OS, Import.SigIndex, "import sig index");
break;
case WASM_EXTERNAL_GLOBAL:
writeGlobalType(OS, Import.Global);
break;
case WASM_EXTERNAL_MEMORY:
writeLimits(OS, Import.Memory);
break;
case WASM_EXTERNAL_TABLE:
writeTableType(OS, Import.Table);
break;
default:
fatal("unsupported import type: " + Twine(Import.Kind));
}
}
void wasm::writeExport(raw_ostream &OS, const WasmExport &Export) {
writeStr(OS, Export.Name, "export name");
writeU8(OS, Export.Kind, "export kind");
switch (Export.Kind) {
case WASM_EXTERNAL_FUNCTION:
writeUleb128(OS, Export.Index, "function index");
break;
case WASM_EXTERNAL_GLOBAL:
writeUleb128(OS, Export.Index, "global index");
break;
case WASM_EXTERNAL_MEMORY:
writeUleb128(OS, Export.Index, "memory index");
break;
case WASM_EXTERNAL_TABLE:
writeUleb128(OS, Export.Index, "table index");
break;
default:
fatal("unsupported export type: " + Twine(Export.Kind));
}
}
} // namespace lld
std::string lld::toString(ValType Type) {
switch (Type) {
case ValType::I32:
return "I32";
case ValType::I64:
return "I64";
case ValType::F32:
return "F32";
case ValType::F64:
return "F64";
case ValType::EXCEPT_REF:
return "except_ref";
}
llvm_unreachable("Invalid wasm::ValType");
}
std::string lld::toString(const WasmSignature &Sig) {
SmallString<128> S("(");
for (uint32_t Type : Sig.ParamTypes) {
if (S.size() != 1)
S += ", ";
S += toString(static_cast<ValType>(Type));
}
S += ") -> ";
if (Sig.ReturnType == WASM_TYPE_NORESULT)
S += "void";
else
S += toString(static_cast<ValType>(Sig.ReturnType));
return S.str();
}
std::string lld::toString(const WasmGlobalType &Sig) {
return (Sig.Mutable ? "var " : "const ") +
toString(static_cast<ValType>(Sig.Type));
}
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