forked from cerc-io/plugeth
Implemented closure arguments
This commit is contained in:
obscuren
parent
9cf8ce9ef8
commit
fa1db8d2dc
@ -68,12 +68,16 @@ const (
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oJUMP = 0x59
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oJUMPI = 0x5a
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oPC = 0x5b
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oMEMSIZE = 0x5c
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oMSIZE = 0x5c
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// 0x60 range - closures
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oCREATE = 0x60
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oCALL = 0x61
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oRETURN = 0x62
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// 0x70 range - other
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oLOG = 0x70 // XXX Unofficial
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oSUICIDE = 0x7f
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)
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// Since the opcodes aren't all in order we can't use a regular slice
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@ -136,12 +140,16 @@ var opCodeToString = map[OpCode]string{
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oJUMP: "JUMP",
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oJUMPI: "JUMPI",
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oPC: "PC",
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oMEMSIZE: "MEMSIZE",
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oMSIZE: "MSIZE",
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// 0x60 range - closures
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oCREATE: "CREATE",
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oCALL: "CALL",
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oRETURN: "RETURN",
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// 0x70 range - other
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oLOG: "LOG",
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oSUICIDE: "SUICIDE",
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}
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func (o OpCode) String() string {
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@ -215,20 +223,30 @@ type Memory struct {
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func (m *Memory) Set(offset, size int64, value []byte) {
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totSize := offset + size
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lenSize := int64(len(m.store))
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lenSize := int64(len(m.store) - 1)
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if totSize > lenSize {
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// Calculate the diff between the sizes
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diff := totSize - lenSize
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if diff > 0 {
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// Create a new empty slice and append it
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newSlice := make([]byte, diff+1)
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newSlice := make([]byte, diff-1)
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// Resize slice
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m.store = append(m.store, newSlice...)
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}
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}
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copy(m.store[offset:offset+size+1], value)
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copy(m.store[offset:offset+size], value)
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}
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func (m *Memory) Get(offset, size int64) []byte {
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return m.store[offset : offset+size]
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}
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func (m *Memory) Print() {
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fmt.Println("### MEM ###")
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if len(m.store) > 0 {
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fmt.Println(m.store)
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} else {
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fmt.Println("-- empty --")
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}
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fmt.Println("###########")
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}
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184
ethchain/vm.go
184
ethchain/vm.go
@ -2,7 +2,7 @@ package ethchain
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import (
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_ "bytes"
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"fmt"
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_ "fmt"
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"github.com/ethereum/eth-go/ethutil"
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_ "github.com/obscuren/secp256k1-go"
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"log"
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@ -36,6 +36,8 @@ func NewVm(state *State, vars RuntimeVars) *Vm {
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return &Vm{vars: vars, state: state}
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}
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var Pow256 = ethutil.BigPow(2, 256)
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func (vm *Vm) RunClosure(closure *Closure) []byte {
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// If the amount of gas supplied is less equal to 0
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if closure.GetGas().Cmp(big.NewInt(0)) <= 0 {
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@ -48,9 +50,10 @@ func (vm *Vm) RunClosure(closure *Closure) []byte {
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stack := NewStack()
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// Instruction pointer
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pc := int64(0)
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// Current address
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//addr := vars.address
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// Current step count
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step := 0
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// The base for all big integer arithmetic
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base := new(big.Int)
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if ethutil.Config.Debug {
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ethutil.Config.Log.Debugf("# op\n")
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@ -75,27 +78,171 @@ func (vm *Vm) RunClosure(closure *Closure) []byte {
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}
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switch op {
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case oLOG:
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stack.Print()
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mem.Print()
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case oSTOP: // Stop the closure
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return closure.Return(nil)
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// 0x20 range
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case oADD:
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x, y := stack.Popn()
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// (x + y) % 2 ** 256
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base.Add(x, y)
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base.Mod(base, Pow256)
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// Pop result back on the stack
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stack.Push(base)
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case oSUB:
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x, y := stack.Popn()
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// (x - y) % 2 ** 256
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base.Sub(x, y)
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base.Mod(base, Pow256)
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// Pop result back on the stack
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stack.Push(base)
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case oMUL:
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x, y := stack.Popn()
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// (x * y) % 2 ** 256
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base.Mul(x, y)
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base.Mod(base, Pow256)
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// Pop result back on the stack
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stack.Push(base)
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case oDIV:
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x, y := stack.Popn()
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// floor(x / y)
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base.Div(x, y)
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// Pop result back on the stack
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stack.Push(base)
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case oSDIV:
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x, y := stack.Popn()
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// n > 2**255
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if x.Cmp(Pow256) > 0 {
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x.Sub(Pow256, x)
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}
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if y.Cmp(Pow256) > 0 {
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y.Sub(Pow256, y)
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}
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z := new(big.Int)
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z.Div(x, y)
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if z.Cmp(Pow256) > 0 {
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z.Sub(Pow256, z)
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}
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// Push result on to the stack
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stack.Push(z)
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case oMOD:
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x, y := stack.Popn()
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base.Mod(x, y)
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stack.Push(base)
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case oSMOD:
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x, y := stack.Popn()
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// n > 2**255
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if x.Cmp(Pow256) > 0 {
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x.Sub(Pow256, x)
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}
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if y.Cmp(Pow256) > 0 {
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y.Sub(Pow256, y)
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}
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z := new(big.Int)
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z.Mod(x, y)
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if z.Cmp(Pow256) > 0 {
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z.Sub(Pow256, z)
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}
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// Push result on to the stack
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stack.Push(z)
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case oEXP:
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x, y := stack.Popn()
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base.Exp(x, y, Pow256)
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stack.Push(base)
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case oNEG:
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base.Sub(Pow256, stack.Pop())
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stack.Push(base)
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case oLT:
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x, y := stack.Popn()
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// x < y
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if x.Cmp(y) < 0 {
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stack.Push(ethutil.BigTrue)
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} else {
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stack.Push(ethutil.BigFalse)
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}
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case oGT:
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x, y := stack.Popn()
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// x > y
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if x.Cmp(y) > 0 {
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stack.Push(ethutil.BigTrue)
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} else {
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stack.Push(ethutil.BigFalse)
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}
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case oNOT:
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x, y := stack.Popn()
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// x != y
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if x.Cmp(y) != 0 {
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stack.Push(ethutil.BigTrue)
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} else {
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stack.Push(ethutil.BigFalse)
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}
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// 0x10 range
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case oAND:
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case oOR:
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case oXOR:
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case oBYTE:
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// 0x20 range
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case oSHA3:
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// 0x30 range
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case oADDRESS:
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case oBALANCE:
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case oORIGIN:
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case oCALLER:
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case oCALLVALUE:
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case oCALLDATA:
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offset := stack.Pop()
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mem.Set(offset.Int64(), int64(len(closure.Args)), closure.Args)
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case oCALLDATASIZE:
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case oRETURNDATASIZE:
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case oTXGASPRICE:
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// 0x40 range
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case oPREVHASH:
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case oPREVNONCE:
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case oCOINBASE:
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case oTIMESTAMP:
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case oNUMBER:
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case oDIFFICULTY:
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case oGASLIMIT:
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// 0x50 range
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case oPUSH: // Push PC+1 on to the stack
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pc++
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val := closure.GetMem(pc).BigInt()
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stack.Push(val)
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case oPOP:
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case oDUP:
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case oSWAP:
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case oMLOAD:
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offset := stack.Pop()
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stack.Push(ethutil.BigD(mem.Get(offset.Int64(), 32)))
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case oMSTORE: // Store the value at stack top-1 in to memory at location stack top
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// Pop value of the stack
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val, mStart := stack.Popn()
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mem.Set(mStart.Int64(), 32, ethutil.BigToBytes(val, 256))
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case oMSTORE8:
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case oSLOAD:
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case oSSTORE:
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case oJUMP:
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case oJUMPI:
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case oPC:
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case oMSIZE:
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case oCALLDATA:
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offset := stack.Pop()
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mem.Set(offset.Int64(), int64(len(closure.Args)), closure.Args)
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// 0x60 range
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case oCALL:
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// Pop return size and offset
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retSize, retOffset := stack.Popn()
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// Pop input size and offset
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inSize, inOffset := stack.Popn()
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// TODO remove me.
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fmt.Sprintln(inSize, inOffset)
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// Get the arguments from the memory
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args := mem.Get(inOffset.Int64(), inSize.Int64())
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// Pop gas and value of the stack.
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gas, value := stack.Popn()
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// Closure addr
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@ -105,7 +252,7 @@ func (vm *Vm) RunClosure(closure *Closure) []byte {
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// Create a new callable closure
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closure := NewClosure(closure, contract, vm.state, gas, value)
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// Executer the closure and get the return value (if any)
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ret := closure.Call(vm, nil)
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ret := closure.Call(vm, args)
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mem.Set(retOffset.Int64(), retSize.Int64(), ret)
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case oRETURN:
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@ -113,6 +260,25 @@ func (vm *Vm) RunClosure(closure *Closure) []byte {
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ret := mem.Get(offset.Int64(), size.Int64())
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return closure.Return(ret)
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case oSUICIDE:
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/*
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recAddr := stack.Pop().Bytes()
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// Purge all memory
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deletedMemory := contract.state.Purge()
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// Add refunds to the pop'ed address
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refund := new(big.Int).Mul(StoreFee, big.NewInt(int64(deletedMemory)))
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account := state.GetAccount(recAddr)
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account.Amount.Add(account.Amount, refund)
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// Update the refunding address
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state.UpdateAccount(recAddr, account)
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// Delete the contract
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state.trie.Update(string(addr), "")
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ethutil.Config.Log.Debugf("(%d) => %x\n", deletedMemory, recAddr)
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break out
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*/
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default:
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ethutil.Config.Log.Debugln("Invalid opcode", op)
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}
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pc++
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@ -1,6 +1,7 @@
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package ethchain
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import (
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"bytes"
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"fmt"
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"github.com/ethereum/eth-go/ethdb"
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"github.com/ethereum/eth-go/ethutil"
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@ -119,11 +120,13 @@ func TestRun3(t *testing.T) {
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"PUSH", "300",
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"PUSH", "0",
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"MSTORE",
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"PUSH", "300",
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"PUSH", "31",
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"MSTORE",
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"PUSH", "62",
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"PUSH", "32",
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"CALLDATA",
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"PUSH", "64",
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"PUSH", "0",
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"LOG",
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"RETURN",
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})
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tx := NewTransaction(ContractAddr, ethutil.Big("100000000000000000000000000000000000000000000000000"), script)
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@ -133,14 +136,21 @@ func TestRun3(t *testing.T) {
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state.UpdateContract(contract)
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callerScript := Compile([]string{
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"PUSH", "62", // ret size
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"PUSH", "1337", // Argument
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"PUSH", "65", // argument mem offset
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"MSTORE",
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"PUSH", "64", // ret size
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"PUSH", "0", // ret offset
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"PUSH", "32", // arg size
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"PUSH", "63", // arg offset
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"PUSH", "65", // arg offset
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"PUSH", "1000", /// Gas
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"PUSH", "0", /// value
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"PUSH", string(addr), // Sender
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"CALL",
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"PUSH", "64",
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"PUSH", "0",
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"RETURN",
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})
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callerTx := NewTransaction(ContractAddr, ethutil.Big("100000000000000000000000000000000000000000000000000"), callerScript)
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@ -158,5 +168,10 @@ func TestRun3(t *testing.T) {
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// XXX Tx data? Could be just an argument to the closure instead
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txData: nil,
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})
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callerClosure.Call(vm, nil)
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ret := callerClosure.Call(vm, nil)
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exp := []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 44, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 57}
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if bytes.Compare(ret, exp) != 0 {
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t.Errorf("expected return value to be %v, got %v", exp, ret)
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}
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}
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@ -65,12 +65,16 @@ var OpCodes = map[string]byte{
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"JUMP": 0x59,
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"JUMPI": 0x5a,
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"PC": 0x5b,
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"MEMSIZE": 0x5c,
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"MSIZE": 0x5c,
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// 0x60 range - closures
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"CREATE": 0x60,
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"CALL": 0x61,
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"RETURN": 0x62,
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// 0x70 range - other
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"LOG": 0x70,
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"SUICIDE": 0x7f,
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}
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func IsOpCode(s string) bool {
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