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Updated stack based vm

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poc8
obscuren 11 years ago
parent 6ab61f2c52
commit 2d3c3674fa
3 changed files with 221 additions and 225 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 67
      parsing.go
  2. 320
      vm.go
  3. 59
      vm_test.go

67
parsing.go
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@ -10,50 +10,29 @@ import (
// Op codes
var OpCodes = map[string]string{
"STOP": "0",
"PUSH": "48", // 0x30
"POP": "49", // 0x31
"LOAD": "54", // 0x36
/* OLD VM OPCODES
"ADD": "16", // 0x10
"SUB": "17", // 0x11
"MUL": "18", // 0x12
"DIV": "19", // 0x13
"SDIV": "20", // 0x14
"MOD": "21", // 0x15
"SMOD": "22", // 0x16
"EXP": "23", // 0x17
"NEG": "24", // 0x18
"LT": "32", // 0x20
"LE": "33", // 0x21
"GT": "34", // 0x22
"GE": "35", // 0x23
"EQ": "36", // 0x24
"NOT": "37", // 0x25
"SHA256": "48", // 0x30
"RIPEMD160": "49", // 0x31
"ECMUL": "50", // 0x32
"ECADD": "51", // 0x33
"SIGN": "52", // 0x34
"RECOVER": "53", // 0x35
"COPY": "64", // 0x40
"ST": "65", // 0x41
"LD": "66", // 0x42
"SET": "67", // 0x43
"JMP": "80", // 0x50
"JMPI": "81", // 0x51
"IND": "82", // 0x52
"EXTRO": "96", // 0x60
"BALANCE": "97", // 0x61
"MKTX": "112", // 0x70
"DATA": "128", // 0x80
"DATAN": "129", // 0x81
"MYADDRESS": "144", // 0x90
"BLKHASH": "145", // 0x91
"COINBASE": "146", // 0x92
"SUICIDE": "255", // 0xff
*/
"STOP": "0",
"ADD": "1",
"MUL": "2",
"SUB": "3",
"DIV": "4",
"SDIV": "5",
"MOD": "6",
"SMOD": "7",
"EXP": "8",
"NEG": "9",
"LT": "10",
"LE": "11",
"GT": "12",
"GE": "13",
"EQ": "14",
"NOT": "15",
"MYADDRESS": "16",
"TXSENDER": "17",
"PUSH": "48",
"POP": "49",
"LOAD": "54",
}

320
vm.go
Unescape View File

@ -12,46 +12,28 @@ import (
// Op codes
const (
oSTOP int = 0x00
oADD int = 0x01
oMUL int = 0x02
oSUB int = 0x03
oDIV int = 0x04
oSDIV int = 0x05
oMOD int = 0x06
oSMOD int = 0x07
oEXP int = 0x08
oNEG int = 0x09
oLT int = 0x0a
oLE int = 0x0b
oGT int = 0x0c
oGE int = 0x0d
oEQ int = 0x0e
oNOT int = 0x0f
oMYADDRESS int = 0x10
oTXSENDER int = 0x11
oPUSH int = 0x30
oPOP int = 0x31
oLOAD int = 0x36
/*
oADD int = 0x10
oSUB int = 0x11
oMUL int = 0x12
oDIV int = 0x13
oSDIV int = 0x14
oMOD int = 0x15
oSMOD int = 0x16
oEXP int = 0x17
oNEG int = 0x18
oLT int = 0x20
oLE int = 0x21
oGT int = 0x22
oGE int = 0x23
oEQ int = 0x24
oNOT int = 0x25
oSHA256 int = 0x30
oRIPEMD160 int = 0x31
oECMUL int = 0x32
oECADD int = 0x33
oSIGN int = 0x34
oRECOVER int = 0x35
oCOPY int = 0x40
oST int = 0x41
oLD int = 0x42
oSET int = 0x43
oJMP int = 0x50
oJMPI int = 0x51
oIND int = 0x52
oEXTRO int = 0x60
oBALANCE int = 0x61
oMKTX int = 0x70
oDATA int = 0x80
oDATAN int = 0x81
oMYADDRESS int = 0x90
oSUICIDE int = 0xff
*/
)
type OpType int
@ -79,9 +61,21 @@ func (st *Stack) Pop() string {
return str
}
func (st *Stack) Popn() (*big.Int, *big.Int) {
s := len(st.data)
strs := st.data[s-2:]
st.data = st.data[:s-2]
return Big(strs[0]), Big(strs[1])
}
func (st *Stack) Push(d string) {
st.data = append(st.data, d)
}
func (st *Stack) Print() {
fmt.Println(st.data)
}
type Vm struct {
// Stack
@ -96,7 +90,7 @@ func NewVm() *Vm {
func (vm *Vm) ProcContract(tx *Transaction, block *Block, cb TxCallback) {
// Instruction pointer
iptr := 0
pc := 0
contract := block.GetContract(tx.Hash())
if contract == nil {
@ -104,164 +98,144 @@ func (vm *Vm) ProcContract(tx *Transaction, block *Block, cb TxCallback) {
return
}
Pow256 := BigPow(2, 256)
fmt.Printf("# op arg\n")
out:
for {
// The base big int for all calculations. Use this for any results.
base := new(big.Int)
base.SetString("0",0) // so it doesn't whine about it
// XXX Should Instr return big int slice instead of string slice?
// Get the next instruction from the contract
op, args, _ := Instr(contract.state.Get(string(Encode(uint32(iptr)))))
//op, _, _ := Instr(contract.state.Get(string(Encode(uint32(pc)))))
op, _, _ := Instr(contract.state.Get(string(NumberToBytes(uint64(pc), 32))))
if !cb(0) { break }
if Debug {
fmt.Printf("%-3d %-4d %v\n", iptr, op, args)
fmt.Printf("%-3d %-4d\n", pc, op)
}
switch op {
case oADD:
x, y := vm.stack.Popn()
// (x + y) % 2 ** 256
base.Add(x, y)
base.Mod(base, Pow256)
// Pop result back on the stack
vm.stack.Push(base.String())
case oSUB:
x, y := vm.stack.Popn()
// (x - y) % 2 ** 256
base.Sub(x, y)
base.Mod(base, Pow256)
// Pop result back on the stack
vm.stack.Push(base.String())
case oMUL:
x, y := vm.stack.Popn()
// (x * y) % 2 ** 256
base.Mul(x, y)
base.Mod(base, Pow256)
// Pop result back on the stack
vm.stack.Push(base.String())
case oDIV:
x, y := vm.stack.Popn()
// floor(x / y)
base.Div(x, y)
// Pop result back on the stack
vm.stack.Push(base.String())
case oSDIV:
x, y := vm.stack.Popn()
// n > 2**255
if x.Cmp(Pow256) > 0 { x.Sub(Pow256, x) }
if y.Cmp(Pow256) > 0 { y.Sub(Pow256, y) }
z := new(big.Int)
z.Div(x, y)
if z.Cmp(Pow256) > 0 { z.Sub(Pow256, z) }
// Push result on to the stack
vm.stack.Push(z.String())
case oMOD:
x, y := vm.stack.Popn()
base.Mod(x, y)
vm.stack.Push(base.String())
case oSMOD:
x, y := vm.stack.Popn()
// n > 2**255
if x.Cmp(Pow256) > 0 { x.Sub(Pow256, x) }
if y.Cmp(Pow256) > 0 { y.Sub(Pow256, y) }
z := new(big.Int)
z.Mod(x, y)
if z.Cmp(Pow256) > 0 { z.Sub(Pow256, z) }
// Push result on to the stack
vm.stack.Push(z.String())
case oEXP:
x, y := vm.stack.Popn()
base.Exp(x, y, Pow256)
vm.stack.Push(base.String())
case oNEG:
base.Sub(Pow256, Big(vm.stack.Pop()))
vm.stack.Push(base.String())
case oLT:
x, y := vm.stack.Popn()
// x < y
if x.Cmp(y) < 0 {
vm.stack.Push("1")
} else {
vm.stack.Push("0")
}
case oLE:
x, y := vm.stack.Popn()
// x <= y
if x.Cmp(y) < 1 {
vm.stack.Push("1")
} else {
vm.stack.Push("0")
}
case oGT:
x, y := vm.stack.Popn()
// x > y
if x.Cmp(y) > 0 {
vm.stack.Push("1")
} else {
vm.stack.Push("0")
}
case oGE:
x, y := vm.stack.Popn()
// x >= y
if x.Cmp(y) > -1 {
vm.stack.Push("1")
} else {
vm.stack.Push("0")
}
case oNOT:
x, y := vm.stack.Popn()
// x != y
if x.Cmp(y) != 0 {
vm.stack.Push("1")
} else {
vm.stack.Push("0")
}
case oMYADDRESS:
vm.stack.Push(string(tx.Hash()))
case oTXSENDER:
vm.stack.Push(tx.sender)
case oPUSH:
// Get the next entry and pushes the value on the stack
iptr++
vm.stack.Push(contract.state.Get(string(Encode(uint32(iptr)))))
pc++
vm.stack.Push(contract.state.Get(string(NumberToBytes(uint64(pc), 32))))
case oPOP:
// Pop current value of the stack
vm.stack.Pop()
case oLOAD:
// Load instruction X on the stack
i, _ := strconv.Atoi(vm.stack.Pop())
vm.stack.Push(contract.state.Get(string(Encode(uint32(i)))))
vm.stack.Push(contract.state.Get(string(NumberToBytes(uint64(i), 32))))
case oSTOP:
break out
}
iptr++
pc++
}
}
/*
type Vm struct {
// Memory stack
stack map[string]string
memory map[string]map[string]string
}
func NewVm() *Vm {
//stackSize := uint(256)
return &Vm{
stack: make(map[string]string),
memory: make(map[string]map[string]string),
}
}
func (vm *Vm) RunTransaction(tx *Transaction, cb TxCallback) {
if Debug {
fmt.Printf(`
# processing Tx (%v)
# fee = %f, ops = %d, sender = %s, value = %d
`, tx.addr, float32(tx.fee) / 1e8, len(tx.data), tx.sender, tx.value)
}
vm.stack = make(map[string]string)
vm.stack["0"] = tx.sender
vm.stack["1"] = "100" //int(tx.value)
vm.stack["1"] = "1000" //int(tx.fee)
// Stack pointer
stPtr := 0
//vm.memory[tx.addr] = make([]int, 256)
vm.memory[tx.addr] = make(map[string]string)
// Define instruction 'accessors' for the instruction, which makes it more readable
// also called register values, shorthanded as Rx/y/z. Memory address are shorthanded as Mx/y/z.
// Instructions are shorthanded as Ix/y/z
x := 0; y := 1; z := 2; //a := 3; b := 4; c := 5
out:
for stPtr < len(tx.data) {
// The base big int for all calculations. Use this for any results.
base := new(big.Int)
// XXX Should Instr return big int slice instead of string slice?
op, args, _ := Instr(tx.data[stPtr])
if Debug {
fmt.Printf("%-3d %d %v\n", stPtr, op, args)
}
opType := OpType(tNorm)
// Determine the op type (used for calculating fees by the block manager)
switch op {
case oEXTRO, oBALANCE:
opType = tExtro
case oSHA256, oRIPEMD160, oECMUL, oECADD: // TODO add rest
opType = tCrypto
}
// If the callback yielded a negative result abort execution
if !cb(opType) { break out }
nptr := stPtr
switch op {
case oSTOP:
fmt.Println("exiting (oSTOP), idx =", nptr)
break out
case oADD:
// (Rx + Ry) % 2 ** 256
base.Add(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]]))
base.Mod(base, big.NewInt(int64(math.Pow(2, 256))))
// Set the result to Rz
vm.stack[args[ z ]] = base.String()
case oSUB:
// (Rx - Ry) % 2 ** 256
base.Sub(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]]))
base.Mod(base, big.NewInt(int64(math.Pow(2, 256))))
// Set the result to Rz
vm.stack[args[ z ]] = base.String()
case oMUL:
// (Rx * Ry) % 2 ** 256
base.Mul(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]]))
base.Mod(base, big.NewInt(int64(math.Pow(2, 256))))
// Set the result to Rz
vm.stack[args[ z ]] = base.String()
case oDIV:
// floor(Rx / Ry)
base.Div(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]]))
// Set the result to Rz
vm.stack[args[ z ]] = base.String()
case oSET:
// Set the (numeric) value at Iy to Rx
vm.stack[args[ x ]] = args[ y ]
case oLD:
// Load the value at Mx to Ry
vm.stack[args[ y ]] = vm.memory[tx.addr][vm.stack[args[ x ]]]
case oLT:
cmp := Big(vm.stack[args[ x ]]).Cmp( Big(vm.stack[args[ y ]]) )
// Set the result as "boolean" value to Rz
if cmp < 0 { // a < b
vm.stack[args[ z ]] = "1"
} else {
vm.stack[args[ z ]] = "0"
}
case oJMP:
// Set the instruction pointer to the value at Rx
ptr, _ := strconv.Atoi( vm.stack[args[ x ]] )
nptr = ptr
case oJMPI:
// Set the instruction pointer to the value at Ry if Rx yields true
if vm.stack[args[ x ]] != "0" {
ptr, _ := strconv.Atoi( vm.stack[args[ y ]] )
nptr = ptr
}
default:
fmt.Println("Error op", op)
break
}
if stPtr == nptr {
stPtr++
} else {
stPtr = nptr
if Debug { fmt.Println("... JMP", nptr, "...") }
}
}
vm.stack.Print()
}
*/

59
vm_test.go
Unescape View File

@ -7,23 +7,66 @@ import (
func TestVm(t *testing.T) {
InitFees()
db, _ := NewMemDatabase()
Db = db
ctrct := NewTransaction("", 20, []string{
"PUSH",
"1a2f2e",
"PUSH",
"hallo",
ctrct := NewTransaction("", 200000000, []string{
"PUSH", "1a2f2e",
"PUSH", "hallo",
"POP", // POP hallo
"PUSH",
"3",
"PUSH", "3",
"LOAD", // Load hallo back on the stack
"PUSH", "1",
"PUSH", "2",
"ADD",
"PUSH", "2",
"PUSH", "1",
"SUB",
"PUSH", "100000000000000000000000",
"PUSH", "10000000000000",
"SDIV",
"PUSH", "105",
"PUSH", "200",
"MOD",
"PUSH", "100000000000000000000000",
"PUSH", "10000000000000",
"SMOD",
"PUSH", "5",
"PUSH", "10",
"LT",
"PUSH", "5",
"PUSH", "5",
"LE",
"PUSH", "50",
"PUSH", "5",
"GT",
"PUSH", "5",
"PUSH", "5",
"GE",
"PUSH", "10",
"PUSH", "10",
"NOT",
"MYADDRESS",
"TXSENDER",
"STOP",
})
tx := NewTransaction("1e8a42ea8cce13", 100, []string{})
block := CreateBlock("", 0, "", "", 0, 0, "", []*Transaction{ctrct, tx})
block := CreateBlock("", 0, "", "c014ba53", 0, 0, "", []*Transaction{ctrct, tx})
db.Put(block.Hash(), block.MarshalRlp())
bm := NewBlockManager()

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