vm

package
v0.7.11 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Dec 24, 2014 License: LGPL-2.1-or-later Imports: 8 Imported by: 0

Documentation

Index

Constants

View Source 
const MaxCallDepth = 1024

Variables

View Source 
var (
	GasStep         = big.NewInt(1)
	GasSha          = big.NewInt(10)
	GasSLoad        = big.NewInt(20)
	GasSStore       = big.NewInt(100)
	GasSStoreRefund = big.NewInt(100)
	GasBalance      = big.NewInt(20)
	GasCreate       = big.NewInt(100)
	GasCall         = big.NewInt(20)
	GasCreateByte   = big.NewInt(5)
	GasSha3Byte     = big.NewInt(10)
	GasSha256Byte   = big.NewInt(50)
	GasRipemdByte   = big.NewInt(50)
	GasMemory       = big.NewInt(1)
	GasData         = big.NewInt(5)
	GasTx           = big.NewInt(500)
	GasLog          = big.NewInt(32)
	GasSha256       = big.NewInt(50)
	GasRipemd       = big.NewInt(50)
	GasEcrecover    = big.NewInt(500)

	Pow256 = ethutil.BigPow(2, 256)

	LogTyPretty byte = 0x1
	LogTyDiff   byte = 0x2

	U256 = ethutil.U256
	S256 = ethutil.S256
)
View Source 
var Precompiled = map[string]*PrecompiledAccount{
	string(ethutil.LeftPadBytes([]byte{1}, 20)): &PrecompiledAccount{func(l int) *big.Int {
		return GasEcrecover
	}, ecrecoverFunc},
	string(ethutil.LeftPadBytes([]byte{2}, 20)): &PrecompiledAccount{func(l int) *big.Int {
		n := big.NewInt(int64(l+31)/32 + 1)
		n.Mul(n, GasSha256)
		return n
	}, sha256Func},
	string(ethutil.LeftPadBytes([]byte{3}, 20)): &PrecompiledAccount{func(l int) *big.Int {
		n := big.NewInt(int64(l+31)/32 + 1)
		n.Mul(n, GasRipemd)
		return n
	}, ripemd160Func},
}

Functions

func Disassemble 

func Disassemble(script []byte) (asm []string)

func IsDepthErr 

func IsDepthErr(err error) bool

func IsOOGErr 

func IsOOGErr(err error) bool

func IsStack 

func IsStack(err error) bool

func Transfer 

func Transfer(from, to Account, amount *big.Int) error

generic transfer method

Types

type Account 

type Account interface {
	SubBalance(amount *big.Int)
	AddBalance(amount *big.Int)
	Balance() *big.Int
}

type Address 

type Address interface {
	Call(in []byte) []byte
}

type Closure 

type Closure struct {
	Code []byte

	Gas, UsedGas, Price *big.Int

	Args []byte
	// contains filtered or unexported fields
}

func NewClosure 

func NewClosure(msg *state.Message, caller ClosureRef, object ClosureRef, code []byte, gas, price *big.Int) *Closure

Create a new closure for the given data items

func (*Closure) Address 

func (c *Closure) Address() []byte

* Set / Get

func (*Closure) GetByte 

func (c *Closure) GetByte(x uint64) byte

func (*Closure) GetBytes 

func (c *Closure) GetBytes(x, y int) []byte

func (*Closure) GetOp 

func (c *Closure) GetOp(x uint64) OpCode

func (*Closure) GetRangeValue 

func (c *Closure) GetRangeValue(x, y uint64) []byte

func (*Closure) Return 

func (c *Closure) Return(ret []byte) []byte

func (*Closure) ReturnGas 

func (c *Closure) ReturnGas(gas, price *big.Int)

Implement the caller interface

func (*Closure) SetCode 

func (self *Closure) SetCode(code []byte)

func (*Closure) UseGas 

func (c *Closure) UseGas(gas *big.Int) bool

* Gas functions

type ClosureRef 

type ClosureRef interface {
	ReturnGas(*big.Int, *big.Int)
	Address() []byte
	SetCode([]byte)
}

type DebugVm 

type DebugVm struct {

	// Debugging
	Dbg Debugger

	BreakPoints []int64
	Stepping    bool
	Fn          string

	Recoverable bool
	// contains filtered or unexported fields
}

func NewDebugVm 

func NewDebugVm(env Environment) *DebugVm

func (*DebugVm) Endl 

func (self *DebugVm) Endl() VirtualMachine

func (*DebugVm) Env 

func (self *DebugVm) Env() Environment

func (*DebugVm) Printf 

func (self *DebugVm) Printf(format string, v ...interface{}) VirtualMachine

func (*DebugVm) Run 

func (self *DebugVm) Run(me, caller ClosureRef, code []byte, value, gas, price *big.Int, callData []byte) (ret []byte, err error)

func (*DebugVm) RunPrecompiled 

func (self *DebugVm) RunPrecompiled(p *PrecompiledAccount, callData []byte, closure *Closure) (ret []byte, err error)

type Debugger 

type Debugger interface {
	BreakHook(step int, op OpCode, mem *Memory, stack *Stack, object *state.StateObject) bool
	StepHook(step int, op OpCode, mem *Memory, stack *Stack, object *state.StateObject) bool
	BreakPoints() []int64
	SetCode(byteCode []byte)
}

type DepthError 

type DepthError struct{}

func (DepthError) Error 

func (self DepthError) Error() string

type Environment 

type Environment interface {
	State() *state.StateDB

	Origin() []byte
	BlockNumber() *big.Int
	PrevHash() []byte
	Coinbase() []byte
	Time() int64
	Difficulty() *big.Int
	BlockHash() []byte
	GasLimit() *big.Int
	Transfer(from, to Account, amount *big.Int) error
	AddLog(state.Log)

	Depth() int
	SetDepth(i int)

	Call(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
	CallCode(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
	Create(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, ClosureRef)
}

type Log 

type Log struct {
	// contains filtered or unexported fields
}

func (*Log) Address 

func (self *Log) Address() []byte

func (*Log) Data 

func (self *Log) Data() []byte

func (*Log) RlpData 

func (self *Log) RlpData() interface{}

func (*Log) String 

func (self *Log) String() string

func (*Log) Topics 

func (self *Log) Topics() [][]byte

type Memory 

type Memory struct {
	// contains filtered or unexported fields
}

func NewMemory 

func NewMemory() *Memory

func (*Memory) Data 

func (m *Memory) Data() []byte

func (*Memory) Get 

func (m *Memory) Get(offset, size int64) []byte

func (*Memory) Geti 

func (self *Memory) Geti(offset, size int64) (cpy []byte)

func (*Memory) Len 

func (m *Memory) Len() int

func (*Memory) Print 

func (m *Memory) Print()

func (*Memory) Resize 

func (m *Memory) Resize(size uint64)

func (*Memory) Set 

func (m *Memory) Set(offset, size uint64, value []byte)

type Object 

type Object interface {
	GetStorage(key *big.Int) *ethutil.Value
	SetStorage(key *big.Int, value *ethutil.Value)
}

type OpCode 

type OpCode byte
const (
	// 0x0 range - arithmetic ops
	STOP OpCode = iota
	ADD
	MUL
	SUB
	DIV
	SDIV
	MOD
	SMOD
	ADDMOD
	MULMOD
	EXP
	SIGNEXTEND
)

Op codes 

const (
	LT OpCode = iota + 0x10
	GT
	SLT
	SGT
	EQ
	ISZERO
	AND
	OR
	XOR
	NOT
	BYTE

	SHA3 = 0x20
)
const (
	// 0x30 range - closure state
	ADDRESS OpCode = 0x30 + iota
	BALANCE
	ORIGIN
	CALLER
	CALLVALUE
	CALLDATALOAD
	CALLDATASIZE
	CALLDATACOPY
	CODESIZE
	CODECOPY
	GASPRICE
	EXTCODESIZE
	EXTCODECOPY
)
const (

	// 0x40 range - block operations
	PREVHASH OpCode = 0x40 + iota
	COINBASE
	TIMESTAMP
	NUMBER
	DIFFICULTY
	GASLIMIT
)
const (
	// 0x50 range - 'storage' and execution
	POP OpCode = 0x50 + iota
	MLOAD
	MSTORE
	MSTORE8
	SLOAD
	SSTORE
	JUMP
	JUMPI
	PC
	MSIZE
	GAS
	JUMPDEST
)
const (
	// 0x60 range
	PUSH1 OpCode = 0x60 + iota
	PUSH2
	PUSH3
	PUSH4
	PUSH5
	PUSH6
	PUSH7
	PUSH8
	PUSH9
	PUSH10
	PUSH11
	PUSH12
	PUSH13
	PUSH14
	PUSH15
	PUSH16
	PUSH17
	PUSH18
	PUSH19
	PUSH20
	PUSH21
	PUSH22
	PUSH23
	PUSH24
	PUSH25
	PUSH26
	PUSH27
	PUSH28
	PUSH29
	PUSH30
	PUSH31
	PUSH32
	DUP1
	DUP2
	DUP3
	DUP4
	DUP5
	DUP6
	DUP7
	DUP8
	DUP9
	DUP10
	DUP11
	DUP12
	DUP13
	DUP14
	DUP15
	DUP16
	SWAP1
	SWAP2
	SWAP3
	SWAP4
	SWAP5
	SWAP6
	SWAP7
	SWAP8
	SWAP9
	SWAP10
	SWAP11
	SWAP12
	SWAP13
	SWAP14
	SWAP15
	SWAP16
)
const (
	LOG0 OpCode = 0xa0 + iota
	LOG1
	LOG2
	LOG3
	LOG4
)
const (
	// 0xf0 range - closures
	CREATE OpCode = 0xf0 + iota
	CALL
	CALLCODE
	RETURN

	// 0x70 range - other
	SUICIDE = 0xff
)

func (OpCode) String 

func (o OpCode) String() string

type OpType 

type OpType int

type OutOfGasError 

type OutOfGasError struct {
	// contains filtered or unexported fields
}

func OOG 

func OOG(req, has *big.Int) OutOfGasError

func (OutOfGasError) Error 

func (self OutOfGasError) Error() string

type PrecompiledAccount 

type PrecompiledAccount struct {
	Gas func(l int) *big.Int
	// contains filtered or unexported fields
}

func (PrecompiledAccount) Call 

func (self PrecompiledAccount) Call(in []byte) []byte

type Stack 

type Stack struct {
	// contains filtered or unexported fields
}

Simple push/pop stack mechanism

func NewStack 

func NewStack() *Stack

func (*Stack) Data 

func (st *Stack) Data() []*big.Int

func (*Stack) Dupn 

func (st *Stack) Dupn(n int) *big.Int

func (*Stack) Get 

func (st *Stack) Get(amount *big.Int) []*big.Int

func (*Stack) Len 

func (st *Stack) Len() int

func (*Stack) Peek 

func (st *Stack) Peek() *big.Int

func (*Stack) Peekn 

func (st *Stack) Peekn() (*big.Int, *big.Int)

func (*Stack) Pop 

func (st *Stack) Pop() *big.Int

func (*Stack) Popn 

func (st *Stack) Popn() (*big.Int, *big.Int)

func (*Stack) Print 

func (st *Stack) Print()

func (*Stack) Push 

func (st *Stack) Push(d *big.Int)

func (*Stack) Swapn 

func (st *Stack) Swapn(n int) (*big.Int, *big.Int)

type StackError 

type StackError struct {
	// contains filtered or unexported fields
}

func StackErr 

func StackErr(req, has int) StackError

func (StackError) Error 

func (self StackError) Error() string

type TxCallback 

type TxCallback func(opType OpType) bool

type Type 

type Type int
const (
	StandardVmTy Type = iota
	DebugVmTy

	MaxVmTy
)

type VirtualMachine 

type VirtualMachine interface {
	Env() Environment
	Run(me, caller ClosureRef, code []byte, value, gas, price *big.Int, data []byte) ([]byte, error)
	Printf(string, ...interface{}) VirtualMachine
	Endl() VirtualMachine
}

func New 

func New(env Environment, typ Type) VirtualMachine

type Vm 

type Vm struct {
	// contains filtered or unexported fields
}

func (*Vm) Depth 

func (self *Vm) Depth() int

func (*Vm) Endl 

func (self *Vm) Endl() VirtualMachine

func (*Vm) Env 

func (self *Vm) Env() Environment

func (*Vm) Printf 

func (self *Vm) Printf(format string, v ...interface{}) VirtualMachine

func (*Vm) Run 

func (self *Vm) Run(me, caller ClosureRef, code []byte, value, gas, price *big.Int, data []byte) (ret []byte, err error)

Source Files

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