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Merge pull request #3688 from nspcc-dev/vm-fix-popitem-refcounting

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vm: fix incorrect refcounting in POPITEM
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Anna Shaleva 2024-11-18 11:32:57 +03:00 committed by GitHub
commit 990634a43a
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2 changed files with 14 additions and 1 deletions
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14
pkg/vm/ref_counter_test.go
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@ -3,6 +3,7 @@ package vm
import (
"testing"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/stretchr/testify/require"
)
@ -46,6 +47,19 @@ func TestRefCounter_Add(t *testing.T) {
require.Equal(t, 2, int(*r))
}
func TestRefCounterPopItem(t *testing.T) {
prog := makeProgram(opcode.POPITEM)
v := load(prog)
v.estack.PushVal(stackitem.NewArray([]stackitem.Item{stackitem.Make(42)}))
require.Equal(t, 2, int(v.refs))
runVM(t, v)
require.Equal(t, 1, v.estack.Len())
require.Equal(t, 1, int(v.refs))
_ = v.estack.Pop()
require.Equal(t, 0, v.estack.Len())
require.Equal(t, 0, int(v.refs))
}
func BenchmarkRefCounter_Add(b *testing.B) {
a := stackitem.NewArray(nil)
rc := newRefCounter()

1
pkg/vm/vm.go
View file

@ -1459,7 +1459,6 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
case *stackitem.Struct:
item.Remove(index)
}
v.refs.Remove(elem)
case opcode.SIZE:
elem := v.estack.Pop()