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go-ethereum/core/vm/jump_table.go
Jeffrey Wilcke c12f4df910 params: core, core/vm, miner: 64bit gas instructions 
Reworked the EVM gas instructions to use 64bit integers rather than
arbitrary size big ints. All gas operations, be it additions,
multiplications or divisions, are checked and guarded against 64 bit
integer overflows.

In additon, most of the protocol paramaters in the params package have
been converted to uint64 and are now constants rather than variables.

* common/math: added overflow check ops
* core: vmenv, env renamed to evm
* eth, internal/ethapi, les: unmetered eth_call and cancel methods
* core/vm: implemented big.Int pool for evm instructions
* core/vm: unexported intPool methods & verification methods
* core/vm: added memoryGasCost overflow check and test
2017-02-13 21:44:25 +01:00

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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package vm
import (
"errors"
"math/big"
"github.com/ethereum/go-ethereum/params"
)
type (
executionFunc func(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error)
gasFunc func(params.GasTable, *EVM, *Contract, *Stack, *Memory, uint64) (uint64, error) // last parameter is the requested memory size as a uint64
stackValidationFunc func(*Stack) error
memorySizeFunc func(*Stack) *big.Int
)
var errGasUintOverflow = errors.New("gas uint64 overflow")
type operation struct {
// op is the operation function
execute executionFunc
// gasCost is the gas function and returns the gas required for execution
gasCost gasFunc
// validateStack validates the stack (size) for the operation
validateStack stackValidationFunc
// memorySize returns the memory size required for the operation
memorySize memorySizeFunc
// halts indicates whether the operation shoult halt further execution
// and return
halts bool
// jumps indicates whether operation made a jump. This prevents the program
// counter from further incrementing.
jumps bool
// valid is used to check whether the retrieved operation is valid and known
valid bool
}
var defaultJumpTable = NewJumpTable()
func NewJumpTable() [256]operation {
return [256]operation{
STOP: {
execute: opStop,
gasCost: constGasFunc(0),
validateStack: makeStackFunc(0, 0),
halts: true,
valid: true,
},
ADD: {
execute: opAdd,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
MUL: {
execute: opMul,
gasCost: constGasFunc(GasFastStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
SUB: {
execute: opSub,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
DIV: {
execute: opDiv,
gasCost: constGasFunc(GasFastStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
SDIV: {
execute: opSdiv,
gasCost: constGasFunc(GasFastStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
MOD: {
execute: opMod,
gasCost: constGasFunc(GasFastStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
SMOD: {
execute: opSmod,
gasCost: constGasFunc(GasFastStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
ADDMOD: {
execute: opAddmod,
gasCost: constGasFunc(GasMidStep),
validateStack: makeStackFunc(3, 1),
valid: true,
},
MULMOD: {
execute: opMulmod,
gasCost: constGasFunc(GasMidStep),
validateStack: makeStackFunc(3, 1),
valid: true,
},
EXP: {
execute: opExp,
gasCost: gasExp,
validateStack: makeStackFunc(2, 1),
valid: true,
},
SIGNEXTEND: {
execute: opSignExtend,
gasCost: constGasFunc(GasFastStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
LT: {
execute: opLt,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
GT: {
execute: opGt,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
SLT: {
execute: opSlt,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
SGT: {
execute: opSgt,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
EQ: {
execute: opEq,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
ISZERO: {
execute: opIszero,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(1, 1),
valid: true,
},
AND: {
execute: opAnd,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
XOR: {
execute: opXor,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
OR: {
execute: opOr,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
NOT: {
execute: opNot,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(1, 1),
valid: true,
},
BYTE: {
execute: opByte,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(2, 1),
valid: true,
},
SHA3: {
execute: opSha3,
gasCost: gasSha3,
validateStack: makeStackFunc(2, 1),
memorySize: memorySha3,
valid: true,
},
ADDRESS: {
execute: opAddress,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
BALANCE: {
execute: opBalance,
gasCost: gasBalance,
validateStack: makeStackFunc(1, 1),
valid: true,
},
ORIGIN: {
execute: opOrigin,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
CALLER: {
execute: opCaller,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
CALLVALUE: {
execute: opCallValue,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
CALLDATALOAD: {
execute: opCalldataLoad,
gasCost: constGasFunc(GasFastestStep),
validateStack: makeStackFunc(1, 1),
valid: true,
},
CALLDATASIZE: {
execute: opCalldataSize,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
CALLDATACOPY: {
execute: opCalldataCopy,
gasCost: gasCalldataCopy,
validateStack: makeStackFunc(3, 0),
memorySize: memoryCalldataCopy,
valid: true,
},
CODESIZE: {
execute: opCodeSize,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
CODECOPY: {
execute: opCodeCopy,
gasCost: gasCodeCopy,
validateStack: makeStackFunc(3, 0),
memorySize: memoryCodeCopy,
valid: true,
},
GASPRICE: {
execute: opGasprice,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
EXTCODESIZE: {
execute: opExtCodeSize,
gasCost: gasExtCodeSize,
validateStack: makeStackFunc(1, 1),
valid: true,
},
EXTCODECOPY: {
execute: opExtCodeCopy,
gasCost: gasExtCodeCopy,
validateStack: makeStackFunc(4, 0),
memorySize: memoryExtCodeCopy,
valid: true,
},
BLOCKHASH: {
execute: opBlockhash,
gasCost: constGasFunc(GasExtStep),
validateStack: makeStackFunc(1, 1),
valid: true,
},
COINBASE: {
execute: opCoinbase,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
TIMESTAMP: {
execute: opTimestamp,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
NUMBER: {
execute: opNumber,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
DIFFICULTY: {
execute: opDifficulty,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
GASLIMIT: {
execute: opGasLimit,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
POP: {
execute: opPop,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(1, 0),
valid: true,
},
MLOAD: {
execute: opMload,
gasCost: gasMLoad,
validateStack: makeStackFunc(1, 1),
memorySize: memoryMLoad,
valid: true,
},
MSTORE: {
execute: opMstore,
gasCost: gasMStore,
validateStack: makeStackFunc(2, 0),
memorySize: memoryMStore,
valid: true,
},
MSTORE8: {
execute: opMstore8,
gasCost: gasMStore8,
memorySize: memoryMStore8,
validateStack: makeStackFunc(2, 0),
valid: true,
},
SLOAD: {
execute: opSload,
gasCost: gasSLoad,
validateStack: makeStackFunc(1, 1),
valid: true,
},
SSTORE: {
execute: opSstore,
gasCost: gasSStore,
validateStack: makeStackFunc(2, 0),
valid: true,
},
JUMP: {
execute: opJump,
gasCost: constGasFunc(GasMidStep),
validateStack: makeStackFunc(1, 0),
jumps: true,
valid: true,
},
JUMPI: {
execute: opJumpi,
gasCost: constGasFunc(GasSlowStep),
validateStack: makeStackFunc(2, 0),
jumps: true,
valid: true,
},
PC: {
execute: opPc,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
MSIZE: {
execute: opMsize,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
GAS: {
execute: opGas,
gasCost: constGasFunc(GasQuickStep),
validateStack: makeStackFunc(0, 1),
valid: true,
},
JUMPDEST: {
execute: opJumpdest,
gasCost: constGasFunc(params.JumpdestGas),
validateStack: makeStackFunc(0, 0),
valid: true,
},
PUSH1: {
execute: makePush(1, big.NewInt(1)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH2: {
execute: makePush(2, big.NewInt(2)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH3: {
execute: makePush(3, big.NewInt(3)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH4: {
execute: makePush(4, big.NewInt(4)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH5: {
execute: makePush(5, big.NewInt(5)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH6: {
execute: makePush(6, big.NewInt(6)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH7: {
execute: makePush(7, big.NewInt(7)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH8: {
execute: makePush(8, big.NewInt(8)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH9: {
execute: makePush(9, big.NewInt(9)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH10: {
execute: makePush(10, big.NewInt(10)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH11: {
execute: makePush(11, big.NewInt(11)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH12: {
execute: makePush(12, big.NewInt(12)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH13: {
execute: makePush(13, big.NewInt(13)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH14: {
execute: makePush(14, big.NewInt(14)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH15: {
execute: makePush(15, big.NewInt(15)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH16: {
execute: makePush(16, big.NewInt(16)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH17: {
execute: makePush(17, big.NewInt(17)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH18: {
execute: makePush(18, big.NewInt(18)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH19: {
execute: makePush(19, big.NewInt(19)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH20: {
execute: makePush(20, big.NewInt(20)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH21: {
execute: makePush(21, big.NewInt(21)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH22: {
execute: makePush(22, big.NewInt(22)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH23: {
execute: makePush(23, big.NewInt(23)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH24: {
execute: makePush(24, big.NewInt(24)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH25: {
execute: makePush(25, big.NewInt(25)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH26: {
execute: makePush(26, big.NewInt(26)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH27: {
execute: makePush(27, big.NewInt(27)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH28: {
execute: makePush(28, big.NewInt(28)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH29: {
execute: makePush(29, big.NewInt(29)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH30: {
execute: makePush(30, big.NewInt(30)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH31: {
execute: makePush(31, big.NewInt(31)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
PUSH32: {
execute: makePush(32, big.NewInt(32)),
gasCost: gasPush,
validateStack: makeStackFunc(0, 1),
valid: true,
},
DUP1: {
execute: makeDup(1),
gasCost: gasDup,
validateStack: makeDupStackFunc(1),
valid: true,
},
DUP2: {
execute: makeDup(2),
gasCost: gasDup,
validateStack: makeDupStackFunc(2),
valid: true,
},
DUP3: {
execute: makeDup(3),
gasCost: gasDup,
validateStack: makeDupStackFunc(3),
valid: true,
},
DUP4: {
execute: makeDup(4),
gasCost: gasDup,
validateStack: makeDupStackFunc(4),
valid: true,
},
DUP5: {
execute: makeDup(5),
gasCost: gasDup,
validateStack: makeDupStackFunc(5),
valid: true,
},
DUP6: {
execute: makeDup(6),
gasCost: gasDup,
validateStack: makeDupStackFunc(6),
valid: true,
},
DUP7: {
execute: makeDup(7),
gasCost: gasDup,
validateStack: makeDupStackFunc(7),
valid: true,
},
DUP8: {
execute: makeDup(8),
gasCost: gasDup,
validateStack: makeDupStackFunc(8),
valid: true,
},
DUP9: {
execute: makeDup(9),
gasCost: gasDup,
validateStack: makeDupStackFunc(9),
valid: true,
},
DUP10: {
execute: makeDup(10),
gasCost: gasDup,
validateStack: makeDupStackFunc(10),
valid: true,
},
DUP11: {
execute: makeDup(11),
gasCost: gasDup,
validateStack: makeDupStackFunc(11),
valid: true,
},
DUP12: {
execute: makeDup(12),
gasCost: gasDup,
validateStack: makeDupStackFunc(12),
valid: true,
},
DUP13: {
execute: makeDup(13),
gasCost: gasDup,
validateStack: makeDupStackFunc(13),
valid: true,
},
DUP14: {
execute: makeDup(14),
gasCost: gasDup,
validateStack: makeDupStackFunc(14),
valid: true,
},
DUP15: {
execute: makeDup(15),
gasCost: gasDup,
validateStack: makeDupStackFunc(15),
valid: true,
},
DUP16: {
execute: makeDup(16),
gasCost: gasDup,
validateStack: makeDupStackFunc(16),
valid: true,
},
SWAP1: {
execute: makeSwap(1),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(2),
valid: true,
},
SWAP2: {
execute: makeSwap(2),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(3),
valid: true,
},
SWAP3: {
execute: makeSwap(3),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(4),
valid: true,
},
SWAP4: {
execute: makeSwap(4),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(5),
valid: true,
},
SWAP5: {
execute: makeSwap(5),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(6),
valid: true,
},
SWAP6: {
execute: makeSwap(6),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(7),
valid: true,
},
SWAP7: {
execute: makeSwap(7),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(8),
valid: true,
},
SWAP8: {
execute: makeSwap(8),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(9),
valid: true,
},
SWAP9: {
execute: makeSwap(9),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(10),
valid: true,
},
SWAP10: {
execute: makeSwap(10),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(11),
valid: true,
},
SWAP11: {
execute: makeSwap(11),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(12),
valid: true,
},
SWAP12: {
execute: makeSwap(12),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(13),
valid: true,
},
SWAP13: {
execute: makeSwap(13),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(14),
valid: true,
},
SWAP14: {
execute: makeSwap(14),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(15),
valid: true,
},
SWAP15: {
execute: makeSwap(15),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(16),
valid: true,
},
SWAP16: {
execute: makeSwap(16),
gasCost: gasSwap,
validateStack: makeSwapStackFunc(17),
valid: true,
},
LOG0: {
execute: makeLog(0),
gasCost: makeGasLog(0),
validateStack: makeStackFunc(2, 0),
memorySize: memoryLog,
valid: true,
},
LOG1: {
execute: makeLog(1),
gasCost: makeGasLog(1),
validateStack: makeStackFunc(3, 0),
memorySize: memoryLog,
valid: true,
},
LOG2: {
execute: makeLog(2),
gasCost: makeGasLog(2),
validateStack: makeStackFunc(4, 0),
memorySize: memoryLog,
valid: true,
},
LOG3: {
execute: makeLog(3),
gasCost: makeGasLog(3),
validateStack: makeStackFunc(5, 0),
memorySize: memoryLog,
valid: true,
},
LOG4: {
execute: makeLog(4),
gasCost: makeGasLog(4),
validateStack: makeStackFunc(6, 0),
memorySize: memoryLog,
valid: true,
},
CREATE: {
execute: opCreate,
gasCost: gasCreate,
validateStack: makeStackFunc(3, 1),
memorySize: memoryCreate,
valid: true,
},
CALL: {
execute: opCall,
gasCost: gasCall,
validateStack: makeStackFunc(7, 1),
memorySize: memoryCall,
valid: true,
},
CALLCODE: {
execute: opCallCode,
gasCost: gasCallCode,
validateStack: makeStackFunc(7, 1),
memorySize: memoryCall,
valid: true,
},
RETURN: {
execute: opReturn,
gasCost: gasReturn,
validateStack: makeStackFunc(2, 0),
memorySize: memoryReturn,
halts: true,
valid: true,
},
DELEGATECALL: {
execute: opDelegateCall,
gasCost: gasDelegateCall,
validateStack: makeStackFunc(6, 1),
memorySize: memoryDelegateCall,
valid: true,
},
SELFDESTRUCT: {
execute: opSuicide,
gasCost: gasSuicide,
validateStack: makeStackFunc(1, 0),
halts: true,
valid: true,
},
}
}
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