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core, core/vm, crypto: fixes for homestead

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* Removed some strange code that didn't apply state reverting properly
* Refactored code setting from vm & state transition to the executioner
* Updated tests
This commit is contained in:
Jeffrey Wilcke
2016-01-19 23:50:00 +01:00
parent 4f4d2b6474
commit b6d88a0e9f
24 changed files with 226 additions and 195 deletions
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44
core/vm/contract.go
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@ -26,7 +26,6 @@ import (
type ContractRef interface {
ReturnGas(*big.Int, *big.Int)
Address() common.Address
SetAddress(common.Address)
Value() *big.Int
SetCode([]byte)
EachStorage(cb func(key, value []byte))
@ -35,8 +34,12 @@ type ContractRef interface {
// Contract represents an ethereum contract in the state database. It contains
// the the contract code, calling arguments. Contract implements ContractRef
type Contract struct {
caller ContractRef
self ContractRef
// CallerAddress is the result of the caller which initialised this
// contract. However when the "call method" is delegated this value
// needs to be initialised to that of the caller's caller.
CallerAddress common.Address
caller ContractRef
self ContractRef
jumpdests destinations // result of JUMPDEST analysis.
@ -51,9 +54,9 @@ type Contract struct {
DelegateCall bool
}
// Create a new context for the given data items.
// NewContract returns a new contract environment for the execution of EVM.
func NewContract(caller ContractRef, object ContractRef, value, gas, price *big.Int) *Contract {
c := &Contract{caller: caller, self: object, Args: nil}
c := &Contract{CallerAddress: caller.Address(), caller: caller, self: object, Args: nil}
if parent, ok := caller.(*Contract); ok {
// Reuse JUMPDEST analysis from parent context if available.
@ -74,6 +77,16 @@ func NewContract(caller ContractRef, object ContractRef, value, gas, price *big.
return c
}
// AsDelegate sets the contract to be a delegate call and returns the current
// contract (for chaining calls)
func (c *Contract) AsDelegate() *Contract {
c.DelegateCall = true
// NOTE: caller must, at all times be a contract. It should never happen
// that caller is something other than a Contract.
c.CallerAddress = c.caller.(*Contract).CallerAddress
return c
}
// GetOp returns the n'th element in the contract's byte array
func (c *Contract) GetOp(n uint64) OpCode {
return OpCode(c.GetByte(n))
@ -88,13 +101,19 @@ func (c *Contract) GetByte(n uint64) byte {
return 0
}
// Return returns the given ret argument and returns any remaining gas to the
// caller
func (c *Contract) Return(ret []byte) []byte {
// Caller returns the caller of the contract.
//
// Caller will recursively call caller when the contract is a delegate
// call, including that of caller's caller.
func (c *Contract) Caller() common.Address {
return c.CallerAddress
}
// Finalise finalises the contract and returning any remaining gas to the original
// caller.
func (c *Contract) Finalise() {
// Return the remaining gas to the caller
c.caller.ReturnGas(c.Gas, c.Price)
return ret
}
// UseGas attempts the use gas and subtracts it and returns true on success
@ -118,11 +137,6 @@ func (c *Contract) Address() common.Address {
return c.self.Address()
}
// SetAddress sets the contracts address
func (c *Contract) SetAddress(addr common.Address) {
c.self.SetAddress(addr)
}
// Value returns the contracts value (sent to it from it's caller)
func (c *Contract) Value() *big.Int {
return c.value