package main import ( "fmt" "math/big" "strconv" "strings" "github.com/ethereum/eth-go/ethchain" "github.com/ethereum/eth-go/ethstate" "github.com/ethereum/eth-go/ethutil" "github.com/ethereum/eth-go/ethvm" "github.com/ethereum/go-ethereum/utils" "gopkg.in/qml.v1" ) type DebuggerWindow struct { win *qml.Window engine *qml.Engine lib *UiLib vm *ethvm.Vm Db *Debugger state *ethstate.State } func NewDebuggerWindow(lib *UiLib) *DebuggerWindow { engine := qml.NewEngine() component, err := engine.LoadFile(lib.AssetPath("debugger/debugger.qml")) if err != nil { fmt.Println(err) return nil } win := component.CreateWindow(nil) w := &DebuggerWindow{engine: engine, win: win, lib: lib, vm: ðvm.Vm{}} w.Db = NewDebugger(w) return w } func (self *DebuggerWindow) Show() { context := self.engine.Context() context.SetVar("dbg", self) go func() { self.win.Show() self.win.Wait() }() } func (self *DebuggerWindow) SetCode(code string) { self.win.Set("codeText", code) } func (self *DebuggerWindow) SetData(data string) { self.win.Set("dataText", data) } func (self *DebuggerWindow) SetAsm(data []byte) { self.win.Root().Call("clearAsm") dis := ethchain.Disassemble(data) for _, str := range dis { self.win.Root().Call("setAsm", str) } } func (self *DebuggerWindow) Compile(code string) { var err error script := ethutil.StringToByteFunc(code, func(s string) (ret []byte) { ret, err = ethutil.Compile(s, true) return }) if err == nil { self.SetAsm(script) } } // Used by QML func (self *DebuggerWindow) AutoComp(code string) { if self.Db.done { self.Compile(code) } } func (self *DebuggerWindow) ClearLog() { self.win.Root().Call("clearLog") } func (self *DebuggerWindow) Debug(valueStr, gasStr, gasPriceStr, scriptStr, dataStr string) { if !self.Db.done { self.Db.Q <- true } defer func() { if r := recover(); r != nil { self.Logf("compile FAULT: %v", r) } }() data := utils.FormatTransactionData(dataStr) var err error script := ethutil.StringToByteFunc(scriptStr, func(s string) (ret []byte) { ret, err = ethutil.Compile(s, false) return }) if err != nil { self.Logln(err) return } var ( gas = ethutil.Big(gasStr) gasPrice = ethutil.Big(gasPriceStr) value = ethutil.Big(valueStr) // Contract addr as test address keyPair = self.lib.eth.KeyManager().KeyPair() ) state := self.lib.eth.StateManager().TransState() account := self.lib.eth.StateManager().TransState().GetAccount(keyPair.Address()) contract := ethstate.NewStateObject([]byte{0}) contract.Balance = value self.SetAsm(script) block := self.lib.eth.BlockChain().CurrentBlock callerClosure := ethvm.NewClosure(ðstate.Message{}, account, contract, script, gas, gasPrice) env := utils.NewEnv(state, block, account.Address(), value) vm := ethvm.New(env) vm.Verbose = true vm.Dbg = self.Db self.vm = vm self.Db.done = false self.Logf("callsize %d", len(script)) go func() { ret, g, err := callerClosure.Call(vm, data) tot := new(big.Int).Mul(g, gasPrice) self.Logf("gas usage %v total price = %v (%v)", g, tot, ethutil.CurrencyToString(tot)) if err != nil { self.Logln("exited with errors:", err) } else { if len(ret) > 0 { self.Logf("exited: % x", ret) } else { self.Logf("exited: nil") } } state.Reset() if !self.Db.interrupt { self.Db.done = true } else { self.Db.interrupt = false } }() } func (self *DebuggerWindow) Logf(format string, v ...interface{}) { self.win.Root().Call("setLog", fmt.Sprintf(format, v...)) } func (self *DebuggerWindow) Logln(v ...interface{}) { str := fmt.Sprintln(v...) self.Logf("%s", str[:len(str)-1]) } func (self *DebuggerWindow) Next() { self.Db.Next() } func (self *DebuggerWindow) Continue() { self.vm.Stepping = false self.Next() } func (self *DebuggerWindow) ExecCommand(command string) { if len(command) > 0 { cmd := strings.Split(command, " ") switch cmd[0] { case "help": self.Logln("Debugger commands:") self.Logln("break, bp Set breakpoint on instruction") self.Logln("clear [log, break, bp] Clears previous set sub-command(s)") case "break", "bp": if len(cmd) > 1 { lineNo, err := strconv.Atoi(cmd[1]) if err != nil { self.Logln(err) break } self.Db.breakPoints = append(self.Db.breakPoints, int64(lineNo)) self.Logf("break point set on instruction %d", lineNo) } else { self.Logf("'%s' requires line number", cmd[0]) } case "clear": if len(cmd) > 1 { switch cmd[1] { case "break", "bp": self.Db.breakPoints = nil self.Logln("Breakpoints cleared") case "log": self.ClearLog() default: self.Logf("clear '%s' is not valid", cmd[1]) } } else { self.Logln("'clear' requires sub command") } default: self.Logf("Unknown command %s", cmd[0]) } } } type Debugger struct { N chan bool Q chan bool done, interrupt bool breakPoints []int64 main *DebuggerWindow win *qml.Window } func NewDebugger(main *DebuggerWindow) *Debugger { db := &Debugger{make(chan bool), make(chan bool), true, false, nil, main, main.win} return db } type storeVal struct { Key, Value string } func (self *Debugger) BreakHook(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool { self.main.Logln("break on instr:", pc) return self.halting(pc, op, mem, stack, stateObject) } func (self *Debugger) StepHook(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool { return self.halting(pc, op, mem, stack, stateObject) } func (self *Debugger) SetCode(byteCode []byte) { self.main.SetAsm(byteCode) } func (self *Debugger) BreakPoints() []int64 { return self.breakPoints } func (d *Debugger) halting(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool { d.win.Root().Call("setInstruction", pc) d.win.Root().Call("clearMem") d.win.Root().Call("clearStack") d.win.Root().Call("clearStorage") addr := 0 for i := 0; i+32 <= mem.Len(); i += 32 { d.win.Root().Call("setMem", memAddr{fmt.Sprintf("%03d", addr), fmt.Sprintf("% x", mem.Data()[i:i+32])}) addr++ } for _, val := range stack.Data() { d.win.Root().Call("setStack", val.String()) } stateObject.EachStorage(func(key string, node *ethutil.Value) { d.win.Root().Call("setStorage", storeVal{fmt.Sprintf("% x", key), fmt.Sprintf("% x", node.Str())}) }) d.win.Root().ObjectByName("info").Set("text", fmt.Sprintf(`stack frame %v`, new(big.Int).SetBytes(mem.Get(0, 32)))) out: for { select { case <-d.N: break out case <-d.Q: d.interrupt = true d.clearBuffers() return false } } return true } func (d *Debugger) clearBuffers() { out: // drain for { select { case <-d.N: case <-d.Q: default: break out } } } func (d *Debugger) Next() { if !d.done { d.N <- true } }