go-ethereum/ethereal/debugger.go

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package main
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import (
"fmt"
"github.com/ethereum/eth-go/ethchain"
"github.com/ethereum/eth-go/ethutil"
"github.com/go-qml/qml"
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"math/big"
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"strconv"
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"strings"
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)
type DebuggerWindow struct {
win *qml.Window
engine *qml.Engine
lib *UiLib
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vm *ethchain.Vm
Db *Debugger
breakPoints []int64
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}
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)
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db := &Debugger{win, make(chan bool), make(chan bool), true, false}
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return &DebuggerWindow{engine: engine, win: win, lib: lib, Db: db, vm: &ethchain.Vm{}}
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}
func (self *DebuggerWindow) Show() {
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context := self.engine.Context()
context.SetVar("dbg", self)
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go func() {
self.win.Show()
self.win.Wait()
}()
}
func (self *DebuggerWindow) SetCode(code string) {
self.win.Set("codeText", code)
}
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func (self *DebuggerWindow) SetData(data string) {
self.win.Set("dataText", data)
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}
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)
}
}
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func (self *DebuggerWindow) Compile(code string) {
var err error
script := ethutil.StringToByteFunc(code, func(s string) (ret []byte) {
ret, err = ethutil.Compile(s)
return
})
if err == nil {
self.SetAsm(script)
}
}
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func (self *DebuggerWindow) Debug(valueStr, gasStr, gasPriceStr, scriptStr, dataStr string) {
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if !self.Db.done {
self.Db.Q <- true
}
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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 {
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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)
return
})
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if err != nil {
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self.Logln(err)
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return
}
self.SetAsm(script)
var (
gas = ethutil.Big(gasStr)
gasPrice = ethutil.Big(gasPriceStr)
value = ethutil.Big(valueStr)
// Contract addr as test address
keyPair = self.lib.eth.KeyManager().KeyPair()
)
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state := self.lib.eth.StateManager().TransState()
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account := self.lib.eth.StateManager().TransState().GetAccount(keyPair.Address())
contract := ethchain.NewStateObject([]byte{0})
contract.Amount = value
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callerClosure := ethchain.NewClosure(account, contract, script, state, gas, gasPrice)
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block := self.lib.eth.BlockChain().CurrentBlock
vm := ethchain.NewVm(state, self.lib.eth.StateManager(), ethchain.RuntimeVars{
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Block: block,
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Origin: account.Address(),
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BlockNumber: block.Number,
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PrevHash: block.PrevHash,
Coinbase: block.Coinbase,
Time: block.Time,
Diff: block.Difficulty,
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Value: ethutil.Big(valueStr),
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})
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vm.Verbose = true
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vm.Hook = self.Db.halting
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vm.BreakPoints = self.breakPoints
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self.vm = vm
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self.Db.done = false
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self.Logf("callsize %d", len(script))
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go func() {
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ret, g, err := callerClosure.Call(vm, data)
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tot := new(big.Int).Mul(g, gasPrice)
self.Logf("gas usage %v total price = %v (%v)", g, tot, ethutil.CurrencyToString(tot))
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if err != nil {
self.Logln("exited with errors:", err)
} else {
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if len(ret) > 0 {
self.Logf("exited: % x", ret)
} else {
self.Logf("exited: nil")
}
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}
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state.Reset()
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if !self.Db.interrupt {
self.Db.done = true
} else {
self.Db.interrupt = false
}
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}()
}
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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])
}
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func (self *DebuggerWindow) Next() {
self.Db.Next()
}
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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 [break, bp] Clears previous set sub-command(s)")
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case "break", "bp":
if len(cmd) > 1 {
lineNo, err := strconv.Atoi(cmd[1])
if err != nil {
self.Logln(err)
break
}
self.breakPoints = append(self.breakPoints, int64(lineNo))
self.vm.BreakPoints = self.breakPoints
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.breakPoints = nil
self.vm.BreakPoints = nil
self.Logln("Breakpoints cleared")
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])
}
}
}
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type Debugger struct {
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win *qml.Window
N chan bool
Q chan bool
done, interrupt bool
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}
type storeVal struct {
Key, Value string
}
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func (d *Debugger) halting(pc int, op ethchain.OpCode, mem *ethchain.Memory, stack *ethchain.Stack, stateObject *ethchain.StateObject) bool {
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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.State().EachStorage(func(key string, node *ethutil.Value) {
d.win.Root().Call("setStorage", storeVal{fmt.Sprintf("% x", key), fmt.Sprintf("% x", node.Str())})
})
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out:
for {
select {
case <-d.N:
break out
case <-d.Q:
d.interrupt = true
d.clearBuffers()
return false
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}
}
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return true
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}
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func (d *Debugger) clearBuffers() {
out:
// drain
for {
select {
case <-d.N:
case <-d.Q:
default:
break out
}
}
}
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func (d *Debugger) Next() {
if !d.done {
d.N <- true
}
}