184e9ae9a8
Reduced the amount of state copied that are required by N calls by doing a balance check prior to any state modifications.
589 lines
16 KiB
Go
589 lines
16 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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type instrFn func(instr instruction, env Environment, context *Context, memory *Memory, stack *stack)
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type instrExFn func(instr instruction, ret *big.Int, env Environment, context *Context, memory *Memory, stack *stack)
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type instruction struct {
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op OpCode
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pc uint64
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fn instrFn
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specFn instrExFn
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data *big.Int
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gas *big.Int
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spop int
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spush int
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}
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func opStaticJump(instr instruction, ret *big.Int, env Environment, context *Context, memory *Memory, stack *stack) {
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ret.Set(instr.data)
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}
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func opAdd(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(U256(new(big.Int).Add(x, y)))
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}
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func opSub(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(U256(new(big.Int).Sub(x, y)))
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}
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func opMul(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(U256(new(big.Int).Mul(x, y)))
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}
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func opDiv(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x, y := stack.pop(), stack.pop()
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if y.Cmp(common.Big0) != 0 {
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base.Div(x, y)
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}
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// pop result back on the stack
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stack.push(U256(base))
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}
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func opSdiv(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x, y := S256(stack.pop()), S256(stack.pop())
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if y.Cmp(common.Big0) == 0 {
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base.Set(common.Big0)
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} else {
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n := new(big.Int)
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if new(big.Int).Mul(x, y).Cmp(common.Big0) < 0 {
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n.SetInt64(-1)
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} else {
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n.SetInt64(1)
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}
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base.Div(x.Abs(x), y.Abs(y)).Mul(base, n)
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U256(base)
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}
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stack.push(base)
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}
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func opMod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x, y := stack.pop(), stack.pop()
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if y.Cmp(common.Big0) == 0 {
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base.Set(common.Big0)
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} else {
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base.Mod(x, y)
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}
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U256(base)
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stack.push(base)
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}
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func opSmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x, y := S256(stack.pop()), S256(stack.pop())
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if y.Cmp(common.Big0) == 0 {
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base.Set(common.Big0)
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} else {
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n := new(big.Int)
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if x.Cmp(common.Big0) < 0 {
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n.SetInt64(-1)
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} else {
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n.SetInt64(1)
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}
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base.Mod(x.Abs(x), y.Abs(y)).Mul(base, n)
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U256(base)
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}
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stack.push(base)
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}
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func opExp(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x, y := stack.pop(), stack.pop()
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base.Exp(x, y, Pow256)
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U256(base)
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stack.push(base)
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}
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func opSignExtend(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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back := stack.pop()
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if back.Cmp(big.NewInt(31)) < 0 {
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bit := uint(back.Uint64()*8 + 7)
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num := stack.pop()
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mask := new(big.Int).Lsh(common.Big1, bit)
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mask.Sub(mask, common.Big1)
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if common.BitTest(num, int(bit)) {
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num.Or(num, mask.Not(mask))
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} else {
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num.And(num, mask)
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}
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num = U256(num)
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stack.push(num)
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}
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}
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func opNot(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(U256(new(big.Int).Not(stack.pop())))
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}
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func opLt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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// x < y
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if x.Cmp(y) < 0 {
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stack.push(common.BigTrue)
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} else {
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stack.push(common.BigFalse)
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}
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}
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func opGt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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// x > y
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if x.Cmp(y) > 0 {
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stack.push(common.BigTrue)
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} else {
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stack.push(common.BigFalse)
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}
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}
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func opSlt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := S256(stack.pop()), S256(stack.pop())
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// x < y
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if x.Cmp(S256(y)) < 0 {
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stack.push(common.BigTrue)
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} else {
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stack.push(common.BigFalse)
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}
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}
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func opSgt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := S256(stack.pop()), S256(stack.pop())
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// x > y
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if x.Cmp(y) > 0 {
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stack.push(common.BigTrue)
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} else {
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stack.push(common.BigFalse)
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}
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}
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func opEq(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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// x == y
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if x.Cmp(y) == 0 {
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stack.push(common.BigTrue)
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} else {
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stack.push(common.BigFalse)
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}
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}
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func opIszero(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x := stack.pop()
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if x.Cmp(common.BigFalse) > 0 {
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stack.push(common.BigFalse)
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} else {
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stack.push(common.BigTrue)
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}
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}
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func opAnd(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(new(big.Int).And(x, y))
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}
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func opOr(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(new(big.Int).Or(x, y))
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}
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func opXor(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(new(big.Int).Xor(x, y))
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}
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func opByte(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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th, val := stack.pop(), stack.pop()
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if th.Cmp(big.NewInt(32)) < 0 {
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byt := big.NewInt(int64(common.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
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base.Set(byt)
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} else {
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base.Set(common.BigFalse)
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}
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stack.push(base)
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}
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func opAddmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x := stack.pop()
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y := stack.pop()
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z := stack.pop()
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if z.Cmp(Zero) > 0 {
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add := new(big.Int).Add(x, y)
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base.Mod(add, z)
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base = U256(base)
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}
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stack.push(base)
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}
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func opMulmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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base := new(big.Int)
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x := stack.pop()
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y := stack.pop()
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z := stack.pop()
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if z.Cmp(Zero) > 0 {
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mul := new(big.Int).Mul(x, y)
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base.Mod(mul, z)
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U256(base)
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}
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stack.push(base)
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}
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func opSha3(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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offset, size := stack.pop(), stack.pop()
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hash := crypto.Sha3(memory.Get(offset.Int64(), size.Int64()))
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stack.push(common.BigD(hash))
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}
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func opAddress(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(common.Bytes2Big(context.Address().Bytes()))
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}
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func opBalance(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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addr := common.BigToAddress(stack.pop())
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balance := env.State().GetBalance(addr)
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stack.push(new(big.Int).Set(balance))
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}
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func opOrigin(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(env.Origin().Big())
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}
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func opCaller(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(common.Bytes2Big(context.caller.Address().Bytes()))
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}
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func opCallValue(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).Set(context.value))
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}
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func opCalldataLoad(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(common.Bytes2Big(getData(context.Input, stack.pop(), common.Big32)))
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}
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func opCalldataSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(big.NewInt(int64(len(context.Input))))
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}
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func opCalldataCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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var (
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mOff = stack.pop()
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cOff = stack.pop()
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l = stack.pop()
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)
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memory.Set(mOff.Uint64(), l.Uint64(), getData(context.Input, cOff, l))
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}
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func opExtCodeSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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addr := common.BigToAddress(stack.pop())
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l := big.NewInt(int64(len(env.State().GetCode(addr))))
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stack.push(l)
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}
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func opCodeSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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l := big.NewInt(int64(len(context.Code)))
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stack.push(l)
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}
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func opCodeCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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var (
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mOff = stack.pop()
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cOff = stack.pop()
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l = stack.pop()
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)
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codeCopy := getData(context.Code, cOff, l)
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memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
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}
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func opExtCodeCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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var (
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addr = common.BigToAddress(stack.pop())
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mOff = stack.pop()
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cOff = stack.pop()
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l = stack.pop()
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)
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codeCopy := getData(env.State().GetCode(addr), cOff, l)
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memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
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}
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func opGasprice(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).Set(context.Price))
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}
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func opBlockhash(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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num := stack.pop()
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n := new(big.Int).Sub(env.BlockNumber(), common.Big257)
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if num.Cmp(n) > 0 && num.Cmp(env.BlockNumber()) < 0 {
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stack.push(env.GetHash(num.Uint64()).Big())
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} else {
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stack.push(common.Big0)
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}
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}
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func opCoinbase(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(env.Coinbase().Big())
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}
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func opTimestamp(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).SetUint64(env.Time()))
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}
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func opNumber(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(U256(env.BlockNumber()))
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}
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func opDifficulty(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).Set(env.Difficulty()))
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}
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func opGasLimit(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).Set(env.GasLimit()))
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}
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func opPop(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.pop()
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}
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func opPush(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).Set(instr.data))
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}
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func opDup(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.dup(int(instr.data.Int64()))
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}
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func opSwap(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.swap(int(instr.data.Int64()))
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}
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func opLog(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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n := int(instr.data.Int64())
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topics := make([]common.Hash, n)
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mStart, mSize := stack.pop(), stack.pop()
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for i := 0; i < n; i++ {
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topics[i] = common.BigToHash(stack.pop())
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}
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d := memory.Get(mStart.Int64(), mSize.Int64())
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log := state.NewLog(context.Address(), topics, d, env.BlockNumber().Uint64())
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env.AddLog(log)
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}
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func opMload(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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offset := stack.pop()
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val := common.BigD(memory.Get(offset.Int64(), 32))
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stack.push(val)
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}
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func opMstore(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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// pop value of the stack
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mStart, val := stack.pop(), stack.pop()
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memory.Set(mStart.Uint64(), 32, common.BigToBytes(val, 256))
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}
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func opMstore8(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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off, val := stack.pop().Int64(), stack.pop().Int64()
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memory.store[off] = byte(val & 0xff)
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}
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func opSload(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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loc := common.BigToHash(stack.pop())
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val := env.State().GetState(context.Address(), loc).Big()
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stack.push(val)
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}
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func opSstore(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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loc := common.BigToHash(stack.pop())
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val := stack.pop()
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env.State().SetState(context.Address(), loc, common.BigToHash(val))
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}
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func opJump(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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}
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func opJumpi(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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}
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func opJumpdest(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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}
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func opPc(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(instr.data)
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}
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func opMsize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(big.NewInt(int64(memory.Len())))
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}
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func opGas(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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stack.push(new(big.Int).Set(context.Gas))
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}
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func opCreate(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
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var (
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value = stack.pop()
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offset, size = stack.pop(), stack.pop()
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input = memory.Get(offset.Int64(), size.Int64())
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gas = new(big.Int).Set(context.Gas)
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addr common.Address
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)
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context.UseGas(context.Gas)
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ret, suberr, ref := env.Create(context, input, gas, context.Price, value)
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if suberr != nil {
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stack.push(common.BigFalse)
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} else {
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// gas < len(ret) * Createinstr.dataGas == NO_CODE
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dataGas := big.NewInt(int64(len(ret)))
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dataGas.Mul(dataGas, params.CreateDataGas)
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if context.UseGas(dataGas) {
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ref.SetCode(ret)
|
|
}
|
|
addr = ref.Address()
|
|
|
|
stack.push(addr.Big())
|
|
|
|
}
|
|
}
|
|
|
|
func opCall(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
|
|
gas := stack.pop()
|
|
// pop gas and value of the stack.
|
|
addr, value := stack.pop(), stack.pop()
|
|
value = U256(value)
|
|
// pop input size and offset
|
|
inOffset, inSize := stack.pop(), stack.pop()
|
|
// pop return size and offset
|
|
retOffset, retSize := stack.pop(), stack.pop()
|
|
|
|
address := common.BigToAddress(addr)
|
|
|
|
// Get the arguments from the memory
|
|
args := memory.Get(inOffset.Int64(), inSize.Int64())
|
|
|
|
if len(value.Bytes()) > 0 {
|
|
gas.Add(gas, params.CallStipend)
|
|
}
|
|
|
|
ret, err := env.Call(context, address, args, gas, context.Price, value)
|
|
|
|
if err != nil {
|
|
stack.push(common.BigFalse)
|
|
|
|
} else {
|
|
stack.push(common.BigTrue)
|
|
|
|
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
|
|
}
|
|
}
|
|
|
|
func opCallCode(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
|
|
gas := stack.pop()
|
|
// pop gas and value of the stack.
|
|
addr, value := stack.pop(), stack.pop()
|
|
value = U256(value)
|
|
// pop input size and offset
|
|
inOffset, inSize := stack.pop(), stack.pop()
|
|
// pop return size and offset
|
|
retOffset, retSize := stack.pop(), stack.pop()
|
|
|
|
address := common.BigToAddress(addr)
|
|
|
|
// Get the arguments from the memory
|
|
args := memory.Get(inOffset.Int64(), inSize.Int64())
|
|
|
|
if len(value.Bytes()) > 0 {
|
|
gas.Add(gas, params.CallStipend)
|
|
}
|
|
|
|
ret, err := env.CallCode(context, address, args, gas, context.Price, value)
|
|
|
|
if err != nil {
|
|
stack.push(common.BigFalse)
|
|
|
|
} else {
|
|
stack.push(common.BigTrue)
|
|
|
|
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
|
|
}
|
|
}
|
|
|
|
func opReturn(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {}
|
|
func opStop(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {}
|
|
|
|
func opSuicide(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
|
|
receiver := env.State().GetOrNewStateObject(common.BigToAddress(stack.pop()))
|
|
balance := env.State().GetBalance(context.Address())
|
|
|
|
receiver.AddBalance(balance)
|
|
|
|
env.State().Delete(context.Address())
|
|
}
|