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Removed defer/panic. #503

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This commit is contained in:
obscuren
2015-03-27 16:09:57 +01:00
parent 00f8319faf
commit 8a22cd5e6c
4 changed files with 181 additions and 121 deletions
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88
core/vm/vm.go
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@ -45,20 +45,32 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
self.Printf("(%d) (%x) %x (code=%d) gas: %v (d) %x", self.env.Depth(), caller.Address().Bytes()[:4], context.Address(), len(code), context.Gas, callData).Endl()
if self.Recoverable {
// Recover from any require exception
defer func() {
if r := recover(); r != nil {
self.Printf(" %v", r).Endl()
/*
if self.Recoverable {
// Recover from any require exception
defer func() {
if r := recover(); r != nil {
self.Printf(" %v", r).Endl()
context.UseGas(context.Gas)
context.UseGas(context.Gas)
ret = context.Return(nil)
ret = context.Return(nil)
err = fmt.Errorf("%v", r)
}
}()
}
err = fmt.Errorf("%v", r)
}
}()
}
*/
defer func() {
if err != nil {
self.Printf(" %v", err).Endl()
// In case of a VM exception (known exceptions) all gas consumed (panics NOT included).
context.UseGas(context.Gas)
ret = context.Return(nil)
}
}()
if context.CodeAddr != nil {
if p := Precompiled[context.CodeAddr.Str()]; p != nil {
@ -76,18 +88,20 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
step = 0
statedb = self.env.State()
jump = func(from uint64, to *big.Int) {
jump = func(from uint64, to *big.Int) error {
p := to.Uint64()
nop := context.GetOp(p)
if !destinations.Has(p) {
panic(fmt.Sprintf("invalid jump destination (%v) %v", nop, p))
return fmt.Errorf("invalid jump destination (%v) %v", nop, p)
}
self.Printf(" ~> %v", to)
pc = to.Uint64()
self.Endl()
return nil
}
)
@ -105,7 +119,10 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
op = context.GetOp(pc)
self.Printf("(pc) %-3d -o- %-14s (m) %-4d (s) %-4d ", pc, op.String(), mem.Len(), stack.len())
newMemSize, gas := self.calculateGasAndSize(context, caller, op, statedb, mem, stack)
newMemSize, gas, err := self.calculateGasAndSize(context, caller, op, statedb, mem, stack)
if err != nil {
return nil, err
}
self.Printf("(g) %-3v (%v)", gas, context.Gas)
@ -600,14 +617,18 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
self.Printf(" {0x%x : 0x%x}", loc, val.Bytes())
case JUMP:
jump(pc, stack.pop())
if err := jump(pc, stack.pop()); err != nil {
return nil, err
}
continue
case JUMPI:
pos, cond := stack.pop(), stack.pop()
if cond.Cmp(common.BigTrue) >= 0 {
jump(pc, pos)
if err := jump(pc, pos); err != nil {
return nil, err
}
continue
}
@ -720,7 +741,7 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
default:
self.Printf("(pc) %-3v Invalid opcode %x\n", pc, op).Endl()
panic(fmt.Errorf("Invalid opcode %x", op))
return nil, fmt.Errorf("Invalid opcode %x", op)
}
pc++
@ -729,28 +750,38 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
}
}
func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *stack) (*big.Int, *big.Int) {
func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *stack) (*big.Int, *big.Int, error) {
var (
gas = new(big.Int)
newMemSize *big.Int = new(big.Int)
)
baseCheck(op, stack, gas)
err := baseCheck(op, stack, gas)
if err != nil {
return nil, nil, err
}
// stack Check, memory resize & gas phase
switch op {
case PUSH1, 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:
gas.Set(GasFastestStep)
case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
n := int(op - SWAP1 + 2)
stack.require(n)
err := stack.require(n)
if err != nil {
return nil, nil, err
}
gas.Set(GasFastestStep)
case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
n := int(op - DUP1 + 1)
stack.require(n)
err := stack.require(n)
if err != nil {
return nil, nil, err
}
gas.Set(GasFastestStep)
case LOG0, LOG1, LOG2, LOG3, LOG4:
n := int(op - LOG0)
stack.require(n + 2)
err := stack.require(n + 2)
if err != nil {
return nil, nil, err
}
mSize, mStart := stack.data[stack.len()-2], stack.data[stack.len()-1]
@ -762,7 +793,10 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
case EXP:
gas.Add(gas, new(big.Int).Mul(big.NewInt(int64(len(stack.data[stack.len()-2].Bytes()))), GasExpByte))
case SSTORE:
stack.require(2)
err := stack.require(2)
if err != nil {
return nil, nil, err
}
var g *big.Int
y, x := stack.data[stack.len()-2], stack.data[stack.len()-1]
@ -853,7 +887,7 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
}
}
return newMemSize, gas
return newMemSize, gas, nil
}
func (self *Vm) RunPrecompiled(p *PrecompiledAccount, callData []byte, context *Context) (ret []byte, err error) {
@ -869,7 +903,7 @@ func (self *Vm) RunPrecompiled(p *PrecompiledAccount, callData []byte, context *
tmp := new(big.Int).Set(context.Gas)
panic(OOG(gas, tmp).Error())
return nil, OOG(gas, tmp)
}
}