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"
"github.com/go-qml/qml"
)
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 := ethutil.StringToByteFunc(dataStr, func(s string) (ret []byte) {
slice := strings.Split(dataStr, "\n")
for _, dataItem := range slice {
d := ethutil.FormatData(dataItem)
ret = append(ret, d...)
}
return
})
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(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())})
})
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
}
}