wavm

package
v0.6.0-alpha.4 Latest Latest
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 Go to latest Published: Apr 1, 2019 License: GPL-3.0 Imports: 32 Imported by: 0

Documentation

Overview

Package compile is used internally by wagon to convert standard structured WebAssembly bytecode into an unstructured form suitable for execution by it's VM. The conversion process consists of translating block instruction sequences and branch operators (br, br_if, br_table) to absolute jumps to PC values. For instance, an instruction sequence like: 

loop
  i32.const 1
  get_local 0
  i32.add
  set_local 0
  get_local 1
  i32.const 1
  i32.add
  tee_local 1
  get_local 2
  i32.eq
  br_if 0
end

Is "compiled" to: 

i32.const 1
i32.add
set_local 0
get_local 1
i32.const 1
i32.add
tee_local 1
get_local 2
i32.eq
jmpnz <addr> <preserve> <discard>

Where jmpnz is a jump-if-not-zero operator that takes certain arguments plus the jump address as immediates. This is in contrast with original WebAssembly bytecode, where the target of branch operators are relative block depths instead.

Index

Constants

View Source 
const (
	OpNameGetBalanceFromAddress = "GetBalanceFromAddress"
	OpNameGetBlockNumber        = "GetBlockNumber"
	OpNameGetGas                = "GetGas"
	OpNameGetBlockHash          = "GetBlockHash"
	OpNameGetBlockProduser      = "GetBlockProduser"
	OpNameGetTimestamp          = "GetTimestamp"
	OpNameGetOrigin             = "GetOrigin"
	OpNameGetSender             = "GetSender"
	OpNameGetGasLimit           = "GetGasLimit"
	OpNameGetValue              = "GetValue"
	OpNameSHA3                  = "SHA3"
	OpNameGetContractAddress    = "GetContractAddress"
	OpNameAssert                = "Assert"

	OpNameEvent = "Event"

	OpNamePrintAddress  = "PrintAddress"
	OpNamePrintStr      = "PrintStr"
	OpNamePrintQStr     = "PrintQStr"
	OpNamePrintUint64T  = "PrintUint64T"
	OpNamePrintUint32T  = "PrintUint32T"
	OpNamePrintInt64T   = "PrintInt64T"
	OpNamePrintInt32T   = "PrintInt32T"
	OpNamePrintUint256T = "PrintUint256T"

	OpNameFromI64 = "FromI64"
	OpNameFromU64 = "FromU64"
	OpNameToI64   = "ToI64"
	OpNameToU64   = "ToU64"
	OpNameConcat  = "Concat"
	OpNameEqual   = "Equal"

	OpNameSendFromContract     = "SendFromContract"
	OpNameTransferFromContract = "TransferFromContract"

	OpNameContractCall = "ContractCall"

	//将字符串转化为地址
	OpNameAddressFrom     = "AddressFrom"
	OpNameAddressToString = "AddressToString"
	OpNameU256From        = "U256From"
	OpNameU256ToString    = "U256ToString"

	OpNameAddKeyInfo          = "AddKeyInfo"
	OpNameWriteWithPointer    = "WriteWithPointer"
	OpNameReadWithPointer     = "ReadWithPointer"
	OpNameInitializeVariables = "InitializeVariables"

	//uint256
	OpNameU256FromU64 = "U256FromU64"
	OpNameU256FromI64 = "U256FromI64"
	OpNameU256Add     = "U256_Add"
	OpNameU256Sub     = "U256_Sub"
	OpNameU256Mul     = "U256_Mul"
	OpNameU256Div     = "U256_Div"
	OpNameU256Mod     = "U256_Mod"
	OpNameU256Pow     = "U256_Pow"
	OpNameU256Cmp     = "U256_Cmp"

	//math
	OpNamePow = "Pow"

	//add gas
	OpNameAddGas = "AddGas"

	OpNameRevert = "Revert"

	//qlang
	OpNameSender = "Sender"
	OpNameLoad   = "Load"
	OpNameStore  = "Store"
)
View Source 
const (
	ActionNameInit  = "init"
	ActionNameApply = "deploy"
	ActionNameQuery = "query"
)
View Source 
const AddressLength = 20
View Source 
const FallBackFunctionName = "Fallback"
View Source 
const FallBackPayableFunctionName = "$Fallback"

Variables

View Source 
var (
	// OpJmp unconditionally jumps to the provided address.
	OpJmp byte = 0x0c
	// OpJmpZ jumps to the given address if the value at the top of the stack is zero.
	OpJmpZ byte = 0x03
	// OpJmpNz jumps to the given address if the value at the top of the
	// stack is not zero. It also discards elements and optionally preserves
	// the topmost value on the stack
	OpJmpNz byte = 0x0d
	// OpDiscard discards a given number of elements from the execution stack.
	OpDiscard byte = 0x0b
	// OpDiscardPreserveTop discards a given number of elements from the
	// execution stack, while preserving the value on the top of the stack.
	OpDiscardPreserveTop byte = 0x05
)

Functions

func Compile 

func Compile(disassembly []disasm.Instr, module *wasm.Module, mutable Mutable) ([]byte, []*vnt.BranchTable)

Compile rewrites WebAssembly bytecode from its disassembly. TODO(vibhavp): Add options for optimizing code. Operators like i32.reinterpret/f32 are no-ops, and can be safely removed.

func CompileModule 

func CompileModule(module *wasm.Module, chainctx ChainContext, mutable Mutable) ([]vnt.Compiled, error)

func GetAbi 

func GetAbi(abibyte []byte) (abi.ABI, error)

Types

type ActionName 

type ActionName string

type ChainContext 

type ChainContext struct {
	// CanTransfer returns whether the account contains
	// sufficient ether to transfer the value
	CanTransfer func(inter.StateDB, common.Address, *big.Int) bool
	// Transfer transfers ether from one account to the other
	Transfer func(inter.StateDB, common.Address, common.Address, *big.Int)
	// GetHash returns the hash corresponding to n
	GetHash func(uint64) common.Hash
	// Message information
	Origin   common.Address // Provides information for ORIGIN
	GasPrice *big.Int       // Provides information for GASPRICE

	// Block information
	Coinbase       common.Address // Provides information for COINBASE
	GasLimit       uint64         // Provides information for GASLIMIT
	BlockNumber    *big.Int       // Provides information for NUMBER
	Time           *big.Int       // Provides information for TIME
	Difficulty     *big.Int       // Provides information for DIFFICULTY
	StateDB        *state.StateDB
	Contract       *contract.WASMContract
	Code           []byte  //Wasm contract code
	Abi            abi.ABI //Wasm contract abi
	Wavm           *WAVM
	IsCreated      bool
	StorageMapping map[uint64]storage.StorageMapping
	GasRule        gas.Gas
	GasCounter     gas.GasCounter
	GasTable       params.GasTable
}

type Code 

type Code struct {
	Body     disasm.Instr
	Children []*Code
}

func (Code) Recursive 

func (c Code) Recursive() []disasm.Instr

type CodeBlock 

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

type EnvFunctions 

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

func (*EnvFunctions) AddGas 

func (ef *EnvFunctions) AddGas(proc *exec.WavmProcess, cost uint64)

func (*EnvFunctions) AddKeyInfo 

func (ef *EnvFunctions) AddKeyInfo(proc *exec.WavmProcess, valAddr, valType, keyAddr, keyType, isArrayIndex uint64)

func (*EnvFunctions) AddressFrom 

func (ef *EnvFunctions) AddressFrom(proc *exec.WavmProcess, idx uint64) uint64

func (*EnvFunctions) AddressToString 

func (ef *EnvFunctions) AddressToString(proc *exec.WavmProcess, idx uint64) uint64

func (*EnvFunctions) Assert 

func (ef *EnvFunctions) Assert(proc *exec.WavmProcess, condition uint64, msgIdx uint64)

func (*EnvFunctions) Concat 

func (ef *EnvFunctions) Concat(proc *exec.WavmProcess, str1Idx uint64, str2Idx uint64) uint64

func (*EnvFunctions) Equal 

func (ef *EnvFunctions) Equal(proc *exec.WavmProcess, str1Idx uint64, str2Idx uint64) uint64

func (*EnvFunctions) GetBalanceFromAddress 

func (ef *EnvFunctions) GetBalanceFromAddress(proc *exec.WavmProcess, locIndex uint64) uint64

todo uint64 =>uint256

func (*EnvFunctions) GetBlockHash 

func (ef *EnvFunctions) GetBlockHash(proc *exec.WavmProcess, blockNum uint64) uint64

func (*EnvFunctions) GetBlockNumber 

func (ef *EnvFunctions) GetBlockNumber(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetBlockProduser 

func (ef *EnvFunctions) GetBlockProduser(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetContractAddress 

func (ef *EnvFunctions) GetContractAddress(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetFuncTable 

func (ef *EnvFunctions) GetFuncTable() map[string]wasm.Function

func (*EnvFunctions) GetGas 

func (ef *EnvFunctions) GetGas(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetGasLimit 

func (ef *EnvFunctions) GetGasLimit(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetOrigin 

func (ef *EnvFunctions) GetOrigin(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetPrintRemark 

func (ef *EnvFunctions) GetPrintRemark(proc *exec.WavmProcess, remarkIdx uint64) string

func (*EnvFunctions) GetSender 

func (ef *EnvFunctions) GetSender(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetTimestamp 

func (ef *EnvFunctions) GetTimestamp(proc *exec.WavmProcess) uint64

func (*EnvFunctions) GetValue 

func (ef *EnvFunctions) GetValue(proc *exec.WavmProcess) uint64

todo 不能转成uint64 必须是uint256

func (*EnvFunctions) InitFuncTable 

func (ef *EnvFunctions) InitFuncTable(context *ChainContext)

func (*EnvFunctions) InitializeVariables 

func (ef *EnvFunctions) InitializeVariables(proc *exec.WavmProcess)

func (*EnvFunctions) Load 

func (ef *EnvFunctions) Load(proc *exec.WavmProcess, keyptr uint64, dataptr uint64) uint64

func (*EnvFunctions) Pow 

func (ef *EnvFunctions) Pow(proc *exec.WavmProcess, base, exponent uint64) uint64

func (*EnvFunctions) PrintAddress 

func (ef *EnvFunctions) PrintAddress(proc *exec.WavmProcess, remarkIdx uint64, strIdx uint64)

Print an Address

func (*EnvFunctions) PrintInt32T 

func (ef *EnvFunctions) PrintInt32T(proc *exec.WavmProcess, remarkIdx uint64, intValue uint64)

Print a int32

func (*EnvFunctions) PrintInt64T 

func (ef *EnvFunctions) PrintInt64T(proc *exec.WavmProcess, remarkIdx uint64, intValue uint64)

Print a int64

func (*EnvFunctions) PrintQStr 

func (ef *EnvFunctions) PrintQStr(proc *exec.WavmProcess, remarkIdx uint64, strIdx uint64)

Print a string

func (*EnvFunctions) PrintStr 

func (ef *EnvFunctions) PrintStr(proc *exec.WavmProcess, remarkIdx uint64, strIdx uint64)

Print a string

func (*EnvFunctions) PrintUint256T 

func (ef *EnvFunctions) PrintUint256T(proc *exec.WavmProcess, remarkIdx uint64, idx uint64)

func (*EnvFunctions) PrintUint32T 

func (ef *EnvFunctions) PrintUint32T(proc *exec.WavmProcess, remarkIdx uint64, intValue uint64)

Print a uint32

func (*EnvFunctions) PrintUint64T 

func (ef *EnvFunctions) PrintUint64T(proc *exec.WavmProcess, remarkIdx uint64, intValue uint64)

Print a uint64

func (*EnvFunctions) ReadWithPointer 

func (ef *EnvFunctions) ReadWithPointer(proc *exec.WavmProcess, offsetAddr, baseAddr uint64)

func (*EnvFunctions) Revert 

func (ef *EnvFunctions) Revert(proc *exec.WavmProcess, msgIdx uint64)

todo 考虑revert的完整实现 contractcall里需要用到revert

func (*EnvFunctions) SHA3 

func (ef *EnvFunctions) SHA3(proc *exec.WavmProcess, dataIdx uint64) uint64

func (*EnvFunctions) SendFromContract 

func (ef *EnvFunctions) SendFromContract(proc *exec.WavmProcess, addrIdx uint64, amountIdx uint64)

func (*EnvFunctions) Sender 

func (ef *EnvFunctions) Sender(proc *exec.WavmProcess, ptr uint64)

func (*EnvFunctions) Store 

func (ef *EnvFunctions) Store(proc *exec.WavmProcess, keyptr uint64, dataptr uint64)

func (*EnvFunctions) TransferFromContract 

func (ef *EnvFunctions) TransferFromContract(proc *exec.WavmProcess, addrIdx uint64, amountIdx uint64) uint64

func (*EnvFunctions) U256Add 

func (ef *EnvFunctions) U256Add(proc *exec.WavmProcess, x, y uint64) uint64

func (*EnvFunctions) U256Cmp 

func (ef *EnvFunctions) U256Cmp(proc *exec.WavmProcess, x, y uint64) uint64

func (*EnvFunctions) U256Div 

func (ef *EnvFunctions) U256Div(proc *exec.WavmProcess, x, y uint64) uint64

func (*EnvFunctions) U256From 

func (ef *EnvFunctions) U256From(proc *exec.WavmProcess, idx uint64) uint64

func (*EnvFunctions) U256FromI64 

func (ef *EnvFunctions) U256FromI64(proc *exec.WavmProcess, x uint64) uint64

func (*EnvFunctions) U256FromU64 

func (ef *EnvFunctions) U256FromU64(proc *exec.WavmProcess, x uint64) uint64

func (*EnvFunctions) U256Mod 

func (ef *EnvFunctions) U256Mod(proc *exec.WavmProcess, x, y uint64) uint64

func (*EnvFunctions) U256Mul 

func (ef *EnvFunctions) U256Mul(proc *exec.WavmProcess, x, y uint64) uint64

func (*EnvFunctions) U256Pow 

func (ef *EnvFunctions) U256Pow(proc *exec.WavmProcess, base, exponent uint64) uint64

func (*EnvFunctions) U256Sub 

func (ef *EnvFunctions) U256Sub(proc *exec.WavmProcess, x, y uint64) uint64

func (*EnvFunctions) U256ToString 

func (ef *EnvFunctions) U256ToString(proc *exec.WavmProcess, idx uint64) uint64

func (*EnvFunctions) WriteWithPointer 

func (ef *EnvFunctions) WriteWithPointer(proc *exec.WavmProcess, offsetAddr, baseAddr uint64)

type EnvModule 

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

func (*EnvModule) GetEnvFunctions 

func (m *EnvModule) GetEnvFunctions() EnvFunctions

func (*EnvModule) GetModule 

func (m *EnvModule) GetModule() *wasm.Module

func (*EnvModule) InitModule 

func (m *EnvModule) InitModule(ctx *ChainContext)

type InvalidFunctionNameError 

type InvalidFunctionNameError string

func (InvalidFunctionNameError) Error 

func (e InvalidFunctionNameError) Error() string

type InvalidPayableFunctionError 

type InvalidPayableFunctionError string

func (InvalidPayableFunctionError) Error 

func (e InvalidPayableFunctionError) Error() string

type MismatchMutableFunctionError 

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

func (MismatchMutableFunctionError) Error 

func (e MismatchMutableFunctionError) Error() string

type Mutable 

type Mutable map[uint32]bool

func MutableFunction 

func MutableFunction(abi abi.ABI, module *wasm.Module) Mutable

type Stack 

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

func (Stack) Len 

func (s Stack) Len() int

func (*Stack) Pop 

func (s *Stack) Pop() *Code

func (*Stack) Push 

func (s *Stack) Push(b *Code)

func (*Stack) Top 

func (s *Stack) Top() *Code

type WAVM 

type WAVM struct {
	// Context provides auxiliary blockchain related information
	vm.Context
	// StateDB gives access to the underlying state
	StateDB inter.StateDB

	Wavm *Wavm
	// contains filtered or unexported fields
}

func NewWAVM 

func NewWAVM(ctx vm.Context, statedb inter.StateDB, chainConfig *params.ChainConfig, vmConfig vm.Config) *WAVM

func (*WAVM) Call 

func (wavm *WAVM) Call(caller vm.ContractRef, addr common.Address, input []byte, gas uint64, value *big.Int) (ret []byte, leftOverGas uint64, err error)

Call executes the contract associated with the addr with the given input as parameters. It also handles any necessary value transfer required and takes the necessary steps to create accounts and reverses the state in case of an execution error or failed value transfer.

func (*WAVM) CallCode 

func (wavm *WAVM) CallCode(caller vm.ContractRef, addr common.Address, input []byte, gas uint64, value *big.Int) (ret []byte, leftOverGas uint64, err error)

CallCode executes the contract associated with the addr with the given input as parameters. It also handles any necessary value transfer required and takes the necessary steps to create accounts and reverses the state in case of an execution error or failed value transfer.

CallCode differs from Call in the sense that it executes the given address' code with the caller as context.

func (*WAVM) Cancel 

func (wavm *WAVM) Cancel()

func (*WAVM) ChainConfig 

func (wavm *WAVM) ChainConfig() *params.ChainConfig

func (*WAVM) Create 

func (wavm *WAVM) Create(caller vm.ContractRef, code []byte, gas uint64, value *big.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error)

func (*WAVM) DelegateCall 

func (wavm *WAVM) DelegateCall(caller vm.ContractRef, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error)

func (*WAVM) GetCallGasTemp 

func (wavm *WAVM) GetCallGasTemp() uint64

func (*WAVM) GetChainConfig 

func (wavm *WAVM) GetChainConfig() *params.ChainConfig

func (*WAVM) GetContext 

func (wavm *WAVM) GetContext() vm.Context

func (*WAVM) GetOrigin 

func (wavm *WAVM) GetOrigin() common.Address

func (*WAVM) GetStateDb 

func (wavm *WAVM) GetStateDb() inter.StateDB

func (*WAVM) GetTime 

func (wavm *WAVM) GetTime() *big.Int

func (*WAVM) SetCallGasTemp 

func (wavm *WAVM) SetCallGasTemp(gas uint64)

func (*WAVM) StaticCall 

func (wavm *WAVM) StaticCall(caller vm.ContractRef, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error)

type Wavm 

type Wavm struct {
	VM           *exec.Interpreter
	Module       *wasm.Module
	ChainContext ChainContext
	GasRules     gas.Gas
	VmConfig     vm.Config
	IsCreated    bool

	MutableList Mutable
	// contains filtered or unexported fields
}

func NewWavm 

func NewWavm(chainctx ChainContext, vmconfig vm.Config, iscreated bool) *Wavm

func (*Wavm) Apply 

func (wavm *Wavm) Apply(input []byte, compiled []vnt.Compiled, mutable Mutable) (res []byte, err error)

func (*Wavm) ExecCodeWithFuncName 

func (wavm *Wavm) ExecCodeWithFuncName(input []byte) ([]byte, error)

func (*Wavm) GetFallBackFunction 

func (wavm *Wavm) GetFallBackFunction() (int64, string)

func (*Wavm) GetFuncName 

func (wavm *Wavm) GetFuncName() string

func (*Wavm) InstantiateModule 

func (wavm *Wavm) InstantiateModule(code []byte, memory []uint8) error

func (*Wavm) ResolveImports 

func (wavm *Wavm) ResolveImports(name string) (*wasm.Module, error)

func (*Wavm) SetFuncName 

func (wavm *Wavm) SetFuncName(name string)

Source Files

View all Source files

Directories

Path Synopsis
internal
stack
Package stack implements a growable uint64 stack
 Package stack implements a growable uint64 stack

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