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Stack limit

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This commit is contained in:
obscuren
2015-03-26 17:45:09 +01:00
parent d36501a6e5
commit c32bca45ad
1 changed files with 6 additions and 0 deletions
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6
core/vm/stack.go
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@@ -5,6 +5,8 @@ import (
"math/big" "math/big"
) )
const maxStack = 1024
func newStack() *stack { func newStack() *stack {
return &stack{} return &stack{}
} }
@@ -15,6 +17,10 @@ type stack struct {
} }
func (st *stack) push(d *big.Int) { func (st *stack) push(d *big.Int) {
if len(st.data) == maxStack {
panic(fmt.Sprintf("stack limit reached (%d)", maxStack))
}
stackItem := new(big.Int).Set(d) stackItem := new(big.Int).Set(d)
if len(st.data) > st.ptr { if len(st.data) > st.ptr {
st.data[st.ptr] = stackItem st.data[st.ptr] = stackItem