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module.go
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module.go
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package compiler
import (
"bytes"
"encoding/binary"
//"fmt"
"github.com/go-interpreter/wagon/disasm"
"github.com/go-interpreter/wagon/wasm"
//"github.com/go-interpreter/wagon/validate"
"github.com/go-interpreter/wagon/wasm/leb128"
"github.com/fendouhyz/life/compiler/opcodes"
"github.com/fendouhyz/life/utils"
"strings"
)
type Module struct {
Base *wasm.Module
FunctionNames map[int]string
DisableFloatingPoint bool
}
type InterpreterCode struct {
NumRegs int
NumParams int
NumLocals int
NumReturns int
Bytes []byte
JITInfo interface{}
JITDone bool
}
func LoadModule(raw []byte) (*Module, error) {
reader := bytes.NewReader(raw)
m, err := wasm.ReadModule(reader, nil)
if err != nil {
return nil, err
}
/*err = validate.VerifyModule(m)
if err != nil {
return nil, err
}*/
functionNames := make(map[int]string)
for _, sec := range m.Customs {
if sec.Name == "name" {
r := bytes.NewReader(sec.RawSection.Bytes)
for {
ty, err := leb128.ReadVarUint32(r)
if err != nil || ty != 1 {
break
}
payloadLen, err := leb128.ReadVarUint32(r)
if err != nil {
panic(err)
}
data := make([]byte, int(payloadLen))
n, err := r.Read(data)
if err != nil {
panic(err)
}
if n != len(data) {
panic("len mismatch")
}
{
r := bytes.NewReader(data)
for {
count, err := leb128.ReadVarUint32(r)
if err != nil {
break
}
for i := 0; i < int(count); i++ {
index, err := leb128.ReadVarUint32(r)
if err != nil {
panic(err)
}
nameLen, err := leb128.ReadVarUint32(r)
if err != nil {
panic(err)
}
name := make([]byte, int(nameLen))
n, err := r.Read(name)
if err != nil {
panic(err)
}
if n != len(name) {
panic("len mismatch")
}
functionNames[int(index)] = string(name)
//fmt.Printf("%d -> %s\n", int(index), string(name))
}
}
}
}
//fmt.Printf("%d function names written\n", len(functionNames))
}
}
return &Module{
Base: m,
FunctionNames: functionNames,
}, nil
}
func (m *Module) CompileWithNGen(gp GasPolicy, numGlobals uint64) (out string, retErr error) {
defer utils.CatchPanic(&retErr)
importStubBuilder := &strings.Builder{}
importTypeIDs := make([]int, 0)
numFuncImports := 0
if m.Base.Import != nil {
for i := 0; i < len(m.Base.Import.Entries); i++ {
e := &m.Base.Import.Entries[i]
if e.Type.Kind() != wasm.ExternalFunction {
continue
}
tyID := e.Type.(wasm.FuncImport).Type
ty := &m.Base.Types.Entries[int(tyID)]
bSprintf(importStubBuilder, "uint64_t %s%d(struct VirtualMachine *vm", NGEN_FUNCTION_PREFIX, i)
for j := 0; j < len(ty.ParamTypes); j++ {
bSprintf(importStubBuilder, ",uint64_t %s%d", NGEN_LOCAL_PREFIX, j)
}
importStubBuilder.WriteString(") {\n")
importStubBuilder.WriteString("uint64_t params[] = {")
for j := 0; j < len(ty.ParamTypes); j++ {
bSprintf(importStubBuilder, "%s%d", NGEN_LOCAL_PREFIX, j)
if j != len(ty.ParamTypes)-1 {
importStubBuilder.WriteByte(',')
}
}
importStubBuilder.WriteString("};\n")
bSprintf(importStubBuilder, "return %sinvoke_import(vm, %d, %d, params);\n", NGEN_ENV_API_PREFIX, numFuncImports, len(ty.ParamTypes))
importStubBuilder.WriteString("}\n")
importTypeIDs = append(importTypeIDs, int(tyID))
numFuncImports++
}
}
out += importStubBuilder.String()
for i, f := range m.Base.FunctionIndexSpace {
//fmt.Printf("Compiling function %d (%+v) with %d locals\n", i, f.Sig, len(f.Body.Locals))
d, err := disasm.Disassemble(f, m.Base)
if err != nil {
panic(err)
}
compiler := NewSSAFunctionCompiler(m.Base, d)
compiler.CallIndexOffset = numFuncImports
compiler.Compile(importTypeIDs)
if m.DisableFloatingPoint {
compiler.FilterFloatingPoint()
}
if gp != nil {
compiler.InsertGasCounters(gp)
}
//fmt.Println(compiler.Code)
//fmt.Printf("%+v\n", compiler.NewCFGraph())
//numRegs := compiler.RegAlloc()
//fmt.Println(compiler.Code)
numLocals := 0
for _, v := range f.Body.Locals {
numLocals += int(v.Count)
}
out += compiler.NGen(uint64(numFuncImports+i), uint64(len(f.Sig.ParamTypes)), uint64(numLocals), numGlobals)
}
return
}
/*
注意这是在自定义的Module里面的成员函数
*/
func (m *Module) CompileForInterpreter(gp GasPolicy) (_retCode []InterpreterCode, retErr error) {
defer utils.CatchPanic(&retErr)
ret := make([]InterpreterCode, 0)
importTypeIDs := make([]int, 0) //字面意思,导入类型的ID列表
if m.Base.Import != nil {
for i := 0; i < len(m.Base.Import.Entries); i++ {
/*
Entries == []ImportEntry
type ImportEntry struct {
ModuleName string // module name string
FieldName string // field name string
// If Kind is Function, Type is a FuncImport containing the type index of the function signature
// If Kind is Table, Type is a TableImport containing the type of the imported table
// If Kind is Memory, Type is a MemoryImport containing the type of the imported memory
// If the Kind is Global, Type is a GlobalVarImport
Type Import
}
*/
e := &m.Base.Import.Entries[i]
if e.Type.Kind() != wasm.ExternalFunction {
continue
}
tyID := e.Type.(wasm.FuncImport).Type
ty := &m.Base.Types.Entries[int(tyID)]
buf := &bytes.Buffer{}
binary.Write(buf, binary.LittleEndian, uint32(1)) // value ID
binary.Write(buf, binary.LittleEndian, opcodes.InvokeImport)
binary.Write(buf, binary.LittleEndian, uint32(i))
binary.Write(buf, binary.LittleEndian, uint32(0))
if len(ty.ReturnTypes) != 0 {
binary.Write(buf, binary.LittleEndian, opcodes.ReturnValue)
binary.Write(buf, binary.LittleEndian, uint32(1))
} else {
binary.Write(buf, binary.LittleEndian, opcodes.ReturnVoid)
}
code := buf.Bytes()
ret = append(ret, InterpreterCode{
NumRegs: 2,
NumParams: len(ty.ParamTypes),
NumLocals: 0,
NumReturns: len(ty.ReturnTypes),
Bytes: code,
})
importTypeIDs = append(importTypeIDs, int(tyID))
}
}
numFuncImports := len(ret)
ret = append(ret, make([]InterpreterCode, len(m.Base.FunctionIndexSpace))...)
for i, f := range m.Base.FunctionIndexSpace {
//fmt.Printf("Compiling function %d (%+v) with %d locals\n", i, f.Sig, len(f.Body.Locals))
d, err := disasm.Disassemble(f, m.Base)
if err != nil {
panic(err)
}
compiler := NewSSAFunctionCompiler(m.Base, d)
compiler.CallIndexOffset = numFuncImports
compiler.Compile(importTypeIDs)
if m.DisableFloatingPoint {
compiler.FilterFloatingPoint()
}
if gp != nil {
compiler.InsertGasCounters(gp)
}
//fmt.Println(compiler.Code)
//fmt.Printf("%+v\n", compiler.NewCFGraph())
numRegs := compiler.RegAlloc()
//fmt.Println(compiler.Code)
numLocals := 0
for _, v := range f.Body.Locals {
numLocals += int(v.Count)
}
ret[numFuncImports+i] = InterpreterCode{
NumRegs: numRegs,
NumParams: len(f.Sig.ParamTypes),
NumLocals: numLocals,
NumReturns: len(f.Sig.ReturnTypes),
Bytes: compiler.Serialize(),
}
}
return ret, nil
}