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core/vm: unexported stack again. No longer required

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This commit is contained in:
obscuren 2015-06-10 17:45:21 +02:00
parent 065aff9ffa
commit fc2a061d51
3 changed files with 16 additions and 16 deletions
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2
core/vm/gas.go
View File

@ -21,7 +21,7 @@ var (
GasContractByte = big.NewInt(200) GasContractByte = big.NewInt(200)
) )
func baseCheck(op OpCode, stack *Stack, gas *big.Int) error { func baseCheck(op OpCode, stack *stack, gas *big.Int) error {
// PUSH and DUP are a bit special. They all cost the same but we do want to have checking on stack push limit // PUSH and DUP are a bit special. They all cost the same but we do want to have checking on stack push limit
// PUSH is also allowed to calculate the same price for all PUSHes // PUSH is also allowed to calculate the same price for all PUSHes
// DUP requirements are handled elsewhere (except for the stack limit check) // DUP requirements are handled elsewhere (except for the stack limit check)

24
core/vm/stack.go
View File

@ -5,20 +5,20 @@ import (
"math/big" "math/big"
) )
func newStack() *Stack { func newstack() *stack {
return &Stack{} return &stack{}
} }
type Stack struct { type stack struct {
data []*big.Int data []*big.Int
ptr int ptr int
} }
func (st *Stack) Data() []*big.Int { func (st *stack) Data() []*big.Int {
return st.data return st.data
} }
func (st *Stack) push(d *big.Int) { func (st *stack) push(d *big.Int) {
// NOTE push limit (1024) is checked in baseCheck // NOTE push limit (1024) is checked in baseCheck
stackItem := new(big.Int).Set(d) stackItem := new(big.Int).Set(d)
if len(st.data) > st.ptr { if len(st.data) > st.ptr {
@ -29,36 +29,36 @@ func (st *Stack) push(d *big.Int) {
st.ptr++ st.ptr++
} }
func (st *Stack) pop() (ret *big.Int) { func (st *stack) pop() (ret *big.Int) {
st.ptr-- st.ptr--
ret = st.data[st.ptr] ret = st.data[st.ptr]
return return
} }
func (st *Stack) len() int { func (st *stack) len() int {
return st.ptr return st.ptr
} }
func (st *Stack) swap(n int) { func (st *stack) swap(n int) {
st.data[st.len()-n], st.data[st.len()-1] = st.data[st.len()-1], st.data[st.len()-n] st.data[st.len()-n], st.data[st.len()-1] = st.data[st.len()-1], st.data[st.len()-n]
} }
func (st *Stack) dup(n int) { func (st *stack) dup(n int) {
st.push(st.data[st.len()-n]) st.push(st.data[st.len()-n])
} }
func (st *Stack) peek() *big.Int { func (st *stack) peek() *big.Int {
return st.data[st.len()-1] return st.data[st.len()-1]
} }
func (st *Stack) require(n int) error { func (st *stack) require(n int) error {
if st.len() < n { if st.len() < n {
return fmt.Errorf("stack underflow (%d <=> %d)", len(st.data), n) return fmt.Errorf("stack underflow (%d <=> %d)", len(st.data), n)
} }
return nil return nil
} }
func (st *Stack) Print() { func (st *stack) Print() {
fmt.Println("### stack ###") fmt.Println("### stack ###")
if len(st.data) > 0 { if len(st.data) > 0 {
for i, val := range st.data { for i, val := range st.data {

6
core/vm/vm.go
View File

@ -75,7 +75,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
op OpCode // current opcode op OpCode // current opcode
codehash = crypto.Sha3Hash(code) // codehash is used when doing jump dest caching codehash = crypto.Sha3Hash(code) // codehash is used when doing jump dest caching
mem = NewMemory() // bound memory mem = NewMemory() // bound memory
stack = newStack() // local stack stack = newstack() // local stack
pc = uint64(0) // program counter pc = uint64(0) // program counter
statedb = self.env.State() // current state statedb = self.env.State() // current state
@ -632,7 +632,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
// calculateGasAndSize calculates the required given the opcode and stack items calculates the new memorysize for // calculateGasAndSize calculates the required given the opcode and stack items calculates the new memorysize for
// the operation. This does not reduce gas or resizes the memory. // the operation. This does not reduce gas or resizes the memory.
func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *Stack) (*big.Int, *big.Int, error) { func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *stack) (*big.Int, *big.Int, error) {
var ( var (
gas = new(big.Int) gas = new(big.Int)
newMemSize *big.Int = new(big.Int) newMemSize *big.Int = new(big.Int)
@ -789,7 +789,7 @@ func (self *Vm) RunPrecompiled(p *PrecompiledAccount, input []byte, context *Con
// log emits a log event to the environment for each opcode encountered. This is not to be confused with the // log emits a log event to the environment for each opcode encountered. This is not to be confused with the
// LOG* opcode. // LOG* opcode.
func (self *Vm) log(pc uint64, op OpCode, gas *big.Int, memory *Memory, stack *Stack, context *Context) { func (self *Vm) log(pc uint64, op OpCode, gas *big.Int, memory *Memory, stack *stack, context *Context) {
if Debug { if Debug {
mem := make([]byte, len(memory.Data())) mem := make([]byte, len(memory.Data()))
copy(mem, memory.Data()) copy(mem, memory.Data())