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Merge pull request #2052 from nspcc-dev/fix-state-276

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vm: copy integers for unary operations, fix #2051
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Roman Khimov 2021-07-08 17:30:02 +03:00 committed by GitHub
commit fc83b34d02
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2 changed files with 15 additions and 3 deletions
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6
pkg/vm/vm.go
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@ -831,7 +831,7 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
// inplace
e := v.estack.Peek(0)
i := e.BigInt()
e.value = stackitem.Make(i.Not(i))
e.value = stackitem.Make(new(big.Int).Not(i))
case opcode.AND:
b := v.estack.Pop().BigInt()
@ -866,11 +866,11 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
case opcode.ABS:
x := v.estack.Pop().BigInt()
v.estack.PushVal(x.Abs(x))
v.estack.PushVal(new(big.Int).Abs(x))
case opcode.NEGATE:
x := v.estack.Pop().BigInt()
v.estack.PushVal(x.Neg(x))
v.estack.PushVal(new(big.Int).Neg(x))
case opcode.INC:
x := v.estack.Pop().BigInt()

12
pkg/vm/vm_test.go
View file

@ -2050,6 +2050,18 @@ func TestDupInt(t *testing.T) {
assert.Equal(t, int64(-1), vm.estack.Pop().BigInt().Int64())
}
func TestNegateCopy(t *testing.T) {
prog := makeProgram(opcode.NEGATE)
v := load(prog)
bi := stackitem.Make(-1)
v.estack.PushVal(bi)
v.estack.PushVal(bi)
runVM(t, v)
assert.Equal(t, 2, v.estack.Len())
assert.Equal(t, int64(1), v.estack.Pop().BigInt().Int64())
assert.Equal(t, int64(-1), v.estack.Pop().BigInt().Int64())
}
func TestDupByteArray(t *testing.T) {
prog := makeProgram(opcode.PUSHDATA1, 2, 1, 0,
opcode.DUP,