core/vm, tests: implemented semi-jit vm

* changed stack and removed stack ptr. Let go decide on slice reuse.

1 files changed, 587 insertions, 0 deletions

diff --git a/core/vm/instructions.go b/core/vm/instructions.go
new file mode 100644
index 000000000..7793ff169
--- /dev/null
+++ b/core/vm/instructions.go
@@ -0,0 +1,587 @@
+// Copyright 2014 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 (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+type instrFn func(instr instruction, env Environment, context *Context, memory *Memory, stack *stack)
+type instrExFn func(instr instruction, ret *big.Int, env Environment, context *Context, memory *Memory, stack *stack)
+
+type instruction struct {
+	op     OpCode
+	pc     uint64
+	fn     instrFn
+	specFn instrExFn
+	data   *big.Int
+
+	gas   *big.Int
+	spop  int
+	spush int
+}
+
+func opStaticJump(instr instruction, ret *big.Int, env Environment, context *Context, memory *Memory, stack *stack) {
+	ret.Set(instr.data)
+}
+
+func opAdd(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	stack.push(U256(new(big.Int).Add(x, y)))
+}
+
+func opSub(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	stack.push(U256(new(big.Int).Sub(x, y)))
+}
+
+func opMul(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	stack.push(U256(new(big.Int).Mul(x, y)))
+}
+
+func opDiv(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x, y := stack.pop(), stack.pop()
+
+	if y.Cmp(common.Big0) != 0 {
+		base.Div(x, y)
+	}
+
+	// pop result back on the stack
+	stack.push(U256(base))
+}
+
+func opSdiv(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x, y := S256(stack.pop()), S256(stack.pop())
+
+	if y.Cmp(common.Big0) == 0 {
+		base.Set(common.Big0)
+	} else {
+		n := new(big.Int)
+		if new(big.Int).Mul(x, y).Cmp(common.Big0) < 0 {
+			n.SetInt64(-1)
+		} else {
+			n.SetInt64(1)
+		}
+
+		base.Div(x.Abs(x), y.Abs(y)).Mul(base, n)
+
+		U256(base)
+	}
+
+	stack.push(base)
+}
+
+func opMod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x, y := stack.pop(), stack.pop()
+
+	if y.Cmp(common.Big0) == 0 {
+		base.Set(common.Big0)
+	} else {
+		base.Mod(x, y)
+	}
+
+	U256(base)
+
+	stack.push(base)
+}
+
+func opSmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x, y := S256(stack.pop()), S256(stack.pop())
+
+	if y.Cmp(common.Big0) == 0 {
+		base.Set(common.Big0)
+	} else {
+		n := new(big.Int)
+		if x.Cmp(common.Big0) < 0 {
+			n.SetInt64(-1)
+		} else {
+			n.SetInt64(1)
+		}
+
+		base.Mod(x.Abs(x), y.Abs(y)).Mul(base, n)
+
+		U256(base)
+	}
+
+	stack.push(base)
+}
+
+func opExp(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x, y := stack.pop(), stack.pop()
+
+	base.Exp(x, y, Pow256)
+
+	U256(base)
+
+	stack.push(base)
+}
+
+func opSignExtend(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	back := stack.pop()
+	if back.Cmp(big.NewInt(31)) < 0 {
+		bit := uint(back.Uint64()*8 + 7)
+		num := stack.pop()
+		mask := new(big.Int).Lsh(common.Big1, bit)
+		mask.Sub(mask, common.Big1)
+		if common.BitTest(num, int(bit)) {
+			num.Or(num, mask.Not(mask))
+		} else {
+			num.And(num, mask)
+		}
+
+		num = U256(num)
+
+		stack.push(num)
+	}
+}
+
+func opNot(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(U256(new(big.Int).Not(stack.pop())))
+}
+
+func opLt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	// x < y
+	if x.Cmp(y) < 0 {
+		stack.push(common.BigTrue)
+	} else {
+		stack.push(common.BigFalse)
+	}
+}
+
+func opGt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	// x > y
+	if x.Cmp(y) > 0 {
+		stack.push(common.BigTrue)
+	} else {
+		stack.push(common.BigFalse)
+	}
+}
+
+func opSlt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := S256(stack.pop()), S256(stack.pop())
+
+	// x < y
+	if x.Cmp(S256(y)) < 0 {
+		stack.push(common.BigTrue)
+	} else {
+		stack.push(common.BigFalse)
+	}
+}
+
+func opSgt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := S256(stack.pop()), S256(stack.pop())
+
+	// x > y
+	if x.Cmp(y) > 0 {
+		stack.push(common.BigTrue)
+	} else {
+		stack.push(common.BigFalse)
+	}
+}
+
+func opEq(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	// x == y
+	if x.Cmp(y) == 0 {
+		stack.push(common.BigTrue)
+	} else {
+		stack.push(common.BigFalse)
+	}
+}
+
+func opIszero(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x := stack.pop()
+	if x.Cmp(common.BigFalse) > 0 {
+		stack.push(common.BigFalse)
+	} else {
+		stack.push(common.BigTrue)
+	}
+}
+
+func opAnd(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	stack.push(new(big.Int).And(x, y))
+}
+func opOr(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	stack.push(new(big.Int).Or(x, y))
+}
+func opXor(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	x, y := stack.pop(), stack.pop()
+
+	stack.push(new(big.Int).Xor(x, y))
+}
+func opByte(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	th, val := stack.pop(), stack.pop()
+
+	if th.Cmp(big.NewInt(32)) < 0 {
+		byt := big.NewInt(int64(common.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
+
+		base.Set(byt)
+	} else {
+		base.Set(common.BigFalse)
+	}
+
+	stack.push(base)
+}
+func opAddmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x := stack.pop()
+	y := stack.pop()
+	z := stack.pop()
+
+	if z.Cmp(Zero) > 0 {
+		add := new(big.Int).Add(x, y)
+		base.Mod(add, z)
+
+		base = U256(base)
+	}
+
+	stack.push(base)
+}
+func opMulmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	base := new(big.Int)
+	x := stack.pop()
+	y := stack.pop()
+	z := stack.pop()
+
+	if z.Cmp(Zero) > 0 {
+		mul := new(big.Int).Mul(x, y)
+		base.Mod(mul, z)
+
+		U256(base)
+	}
+
+	stack.push(base)
+}
+
+func opSha3(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	offset, size := stack.pop(), stack.pop()
+	hash := crypto.Sha3(memory.Get(offset.Int64(), size.Int64()))
+
+	stack.push(common.BigD(hash))
+}
+
+func opAddress(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(common.Bytes2Big(context.Address().Bytes()))
+}
+
+func opBalance(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	addr := common.BigToAddress(stack.pop())
+	balance := env.State().GetBalance(addr)
+
+	stack.push(new(big.Int).Set(balance))
+}
+
+func opOrigin(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(env.Origin().Big())
+}
+
+func opCaller(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(common.Bytes2Big(context.caller.Address().Bytes()))
+}
+
+func opCallValue(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).Set(context.value))
+}
+
+func opCalldataLoad(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(common.Bytes2Big(getData(context.Input, stack.pop(), common.Big32)))
+}
+
+func opCalldataSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(big.NewInt(int64(len(context.Input))))
+}
+
+func opCalldataCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	var (
+		mOff = stack.pop()
+		cOff = stack.pop()
+		l    = stack.pop()
+	)
+	memory.Set(mOff.Uint64(), l.Uint64(), getData(context.Input, cOff, l))
+}
+
+func opExtCodeSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	addr := common.BigToAddress(stack.pop())
+	l := big.NewInt(int64(len(env.State().GetCode(addr))))
+	stack.push(l)
+}
+
+func opCodeSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	l := big.NewInt(int64(len(context.Code)))
+	stack.push(l)
+}
+
+func opCodeCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	var (
+		mOff = stack.pop()
+		cOff = stack.pop()
+		l    = stack.pop()
+	)
+	codeCopy := getData(context.Code, cOff, l)
+
+	memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
+}
+
+func opExtCodeCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	var (
+		addr = common.BigToAddress(stack.pop())
+		mOff = stack.pop()
+		cOff = stack.pop()
+		l    = stack.pop()
+	)
+	codeCopy := getData(env.State().GetCode(addr), cOff, l)
+
+	memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
+}
+
+func opGasprice(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).Set(context.Price))
+}
+
+func opBlockhash(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	num := stack.pop()
+
+	n := new(big.Int).Sub(env.BlockNumber(), common.Big257)
+	if num.Cmp(n) > 0 && num.Cmp(env.BlockNumber()) < 0 {
+		stack.push(env.GetHash(num.Uint64()).Big())
+	} else {
+		stack.push(common.Big0)
+	}
+}
+
+func opCoinbase(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(env.Coinbase().Big())
+}
+
+func opTimestamp(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).SetUint64(env.Time()))
+}
+
+func opNumber(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(U256(env.BlockNumber()))
+}
+
+func opDifficulty(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).Set(env.Difficulty()))
+}
+
+func opGasLimit(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).Set(env.GasLimit()))
+}
+
+func opPop(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.pop()
+}
+
+func opPush(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).Set(instr.data))
+}
+
+func opDup(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.dup(int(instr.data.Int64()))
+}
+
+func opSwap(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.swap(int(instr.data.Int64()))
+}
+
+func opLog(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	n := int(instr.data.Int64())
+	topics := make([]common.Hash, n)
+	mStart, mSize := stack.pop(), stack.pop()
+	for i := 0; i < n; i++ {
+		topics[i] = common.BigToHash(stack.pop())
+	}
+
+	d := memory.Get(mStart.Int64(), mSize.Int64())
+	log := state.NewLog(context.Address(), topics, d, env.BlockNumber().Uint64())
+	env.AddLog(log)
+}
+
+func opMload(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	offset := stack.pop()
+	val := common.BigD(memory.Get(offset.Int64(), 32))
+	stack.push(val)
+}
+
+func opMstore(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	// pop value of the stack
+	mStart, val := stack.pop(), stack.pop()
+	memory.Set(mStart.Uint64(), 32, common.BigToBytes(val, 256))
+}
+
+func opMstore8(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	off, val := stack.pop().Int64(), stack.pop().Int64()
+	memory.store[off] = byte(val & 0xff)
+}
+
+func opSload(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	loc := common.BigToHash(stack.pop())
+	val := env.State().GetState(context.Address(), loc).Big()
+	stack.push(val)
+}
+
+func opSstore(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	loc := common.BigToHash(stack.pop())
+	val := stack.pop()
+
+	env.State().SetState(context.Address(), loc, common.BigToHash(val))
+}
+
+func opJump(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+}
+func opJumpi(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+}
+func opJumpdest(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+}
+
+func opPc(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(instr.data)
+}
+
+func opMsize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(big.NewInt(int64(memory.Len())))
+}
+
+func opGas(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	stack.push(new(big.Int).Set(context.Gas))
+}
+
+func opCreate(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
+	var (
+		value        = stack.pop()
+		offset, size = stack.pop(), stack.pop()
+		input        = memory.Get(offset.Int64(), size.Int64())
+		gas          = new(big.Int).Set(context.Gas)
+		addr         common.Address
+	)
+
+	context.UseGas(context.Gas)
+	ret, suberr, ref := env.Create(context, input, gas, context.Price, value)
+	if suberr != nil {
+		stack.push(common.BigFalse)
+
+	} else {
+		// gas < len(ret) * Createinstr.dataGas == NO_CODE
+		dataGas := big.NewInt(int64(len(ret)))
+		dataGas.Mul(dataGas, params.CreateDataGas)
+		if context.UseGas(dataGas) {
+			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())
+}