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neo-go/pkg/vm/vm_test.go
Anna Shaleva 11151938b9
Merge pull request #3599 from Slava0135/fix-modmul 
vm: fix modmul operation
2024-10-07 12:43:45 +03:00

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package vm
import (
"bytes"
"encoding/binary"
"encoding/hex"
"errors"
"fmt"
"math"
"math/big"
"math/rand/v2"
"strings"
"testing"
"github.com/nspcc-dev/neo-go/internal/random"
"github.com/nspcc-dev/neo-go/pkg/core/interop/interopnames"
"github.com/nspcc-dev/neo-go/pkg/encoding/bigint"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func fooInteropHandler(v *VM, id uint32) error {
if id == interopnames.ToID([]byte("foo")) {
if !v.AddGas(1) {
return errors.New("invalid gas amount")
}
v.Estack().PushVal(1)
return nil
}
return errors.New("syscall not found")
}
func TestInteropHook(t *testing.T) {
v := newTestVM()
v.SyscallHandler = fooInteropHandler
buf := io.NewBufBinWriter()
emit.Syscall(buf.BinWriter, "foo")
emit.Opcodes(buf.BinWriter, opcode.RET)
v.Load(buf.Bytes())
runVM(t, v)
assert.Equal(t, 1, v.estack.Len())
assert.Equal(t, big.NewInt(1), v.estack.Pop().value.Value())
}
func TestVM_SetPriceGetter(t *testing.T) {
v := newTestVM()
prog := []byte{
byte(opcode.PUSH4), byte(opcode.PUSH2),
byte(opcode.PUSHDATA1), 0x01, 0x01,
byte(opcode.PUSHDATA1), 0x02, 0xCA, 0xFE,
byte(opcode.PUSH4), byte(opcode.RET),
}
t.Run("no price getter", func(t *testing.T) {
v.Load(prog)
runVM(t, v)
require.EqualValues(t, 0, v.GasConsumed())
})
v.SetPriceGetter(func(op opcode.Opcode, p []byte) int64 {
if op == opcode.PUSH4 {
return 1
} else if op == opcode.PUSHDATA1 && bytes.Equal(p, []byte{0xCA, 0xFE}) {
return 7
}
return 0
})
t.Run("with price getter", func(t *testing.T) {
v.Load(prog)
runVM(t, v)
require.EqualValues(t, 9, v.GasConsumed())
})
t.Run("with sufficient gas limit", func(t *testing.T) {
v.Load(prog)
v.GasLimit = 9
runVM(t, v)
require.EqualValues(t, 9, v.GasConsumed())
})
t.Run("with small gas limit", func(t *testing.T) {
v.Load(prog)
v.GasLimit = 8
checkVMFailed(t, v)
})
}
func TestAddGas(t *testing.T) {
v := newTestVM()
v.GasLimit = 10
require.True(t, v.AddGas(5))
require.True(t, v.AddGas(5))
require.False(t, v.AddGas(5))
}
func TestPushBytes1to75(t *testing.T) {
buf := io.NewBufBinWriter()
for i := 1; i <= 75; i++ {
b := randomBytes(i)
emit.Bytes(buf.BinWriter, b)
vm := load(buf.Bytes())
err := vm.Step()
require.NoError(t, err)
assert.Equal(t, 1, vm.estack.Len())
elem := vm.estack.Pop()
assert.IsType(t, &stackitem.ByteArray{}, elem.value)
assert.IsType(t, elem.Bytes(), b)
assert.Equal(t, 0, vm.estack.Len())
errExec := vm.execute(nil, opcode.RET, nil)
require.NoError(t, errExec)
assert.Nil(t, vm.Context())
buf.Reset()
}
}
func runVM(t *testing.T, vm *VM) {
err := vm.Run()
require.NoError(t, err)
assert.Equal(t, false, vm.HasFailed())
}
func checkVMFailed(t *testing.T, vm *VM) {
err := vm.Run()
require.Error(t, err)
assert.Equal(t, true, vm.HasFailed())
}
func TestStackLimitPUSH1Good(t *testing.T) {
prog := make([]byte, MaxStackSize*2)
for i := range MaxStackSize {
prog[i] = byte(opcode.PUSH1)
}
for i := MaxStackSize; i < MaxStackSize*2; i++ {
prog[i] = byte(opcode.DROP)
}
v := load(prog)
runVM(t, v)
}
func TestStackLimitPUSH1Bad(t *testing.T) {
prog := make([]byte, MaxStackSize+1)
for i := range prog {
prog[i] = byte(opcode.PUSH1)
}
v := load(prog)
checkVMFailed(t, v)
}
func TestPUSHINT(t *testing.T) {
for i := range byte(5) {
op := opcode.PUSHINT8 + opcode.Opcode(i)
t.Run(op.String(), func(t *testing.T) {
buf := random.Bytes((8 << i) / 8)
prog := append([]byte{byte(op)}, buf...)
runWithArgs(t, prog, bigint.FromBytes(buf))
})
}
}
func TestPUSHNULL(t *testing.T) {
prog := makeProgram(opcode.PUSHNULL, opcode.PUSHNULL, opcode.EQUAL)
v := load(prog)
require.NoError(t, v.Step())
require.Equal(t, 1, v.estack.Len())
runVM(t, v)
require.True(t, v.estack.Pop().Bool())
}
func TestISNULL(t *testing.T) {
prog := makeProgram(opcode.ISNULL)
t.Run("Integer", getTestFuncForVM(prog, false, 1))
t.Run("Null", getTestFuncForVM(prog, true, stackitem.Null{}))
}
func testISTYPE(t *testing.T, result bool, typ stackitem.Type, item stackitem.Item) {
prog := []byte{byte(opcode.ISTYPE), byte(typ)}
runWithArgs(t, prog, result, item)
}
func TestISTYPE(t *testing.T) {
t.Run("Integer", func(t *testing.T) {
testISTYPE(t, true, stackitem.IntegerT, stackitem.NewBigInteger(big.NewInt(42)))
testISTYPE(t, false, stackitem.IntegerT, stackitem.NewByteArray([]byte{}))
})
t.Run("Boolean", func(t *testing.T) {
testISTYPE(t, true, stackitem.BooleanT, stackitem.NewBool(true))
testISTYPE(t, false, stackitem.BooleanT, stackitem.NewByteArray([]byte{}))
})
t.Run("ByteArray", func(t *testing.T) {
testISTYPE(t, true, stackitem.ByteArrayT, stackitem.NewByteArray([]byte{}))
testISTYPE(t, false, stackitem.ByteArrayT, stackitem.NewBigInteger(big.NewInt(42)))
})
t.Run("Array", func(t *testing.T) {
testISTYPE(t, true, stackitem.ArrayT, stackitem.NewArray([]stackitem.Item{}))
testISTYPE(t, false, stackitem.ArrayT, stackitem.NewByteArray([]byte{}))
})
t.Run("Struct", func(t *testing.T) {
testISTYPE(t, true, stackitem.StructT, stackitem.NewStruct([]stackitem.Item{}))
testISTYPE(t, false, stackitem.StructT, stackitem.NewByteArray([]byte{}))
})
t.Run("Map", func(t *testing.T) {
testISTYPE(t, true, stackitem.MapT, stackitem.NewMap())
testISTYPE(t, false, stackitem.MapT, stackitem.NewByteArray([]byte{}))
})
t.Run("Interop", func(t *testing.T) {
testISTYPE(t, true, stackitem.InteropT, stackitem.NewInterop(42))
testISTYPE(t, false, stackitem.InteropT, stackitem.NewByteArray([]byte{}))
})
}
func testCONVERT(to stackitem.Type, item, res stackitem.Item) func(t *testing.T) {
return func(t *testing.T) {
prog := []byte{byte(opcode.CONVERT), byte(to)}
runWithArgs(t, prog, res, item)
}
}
func TestCONVERT(t *testing.T) {
type convertTC struct {
item, res stackitem.Item
}
arr := []stackitem.Item{
stackitem.NewBigInteger(big.NewInt(7)),
stackitem.NewByteArray([]byte{4, 8, 15}),
}
m := stackitem.NewMap()
m.Add(stackitem.NewByteArray([]byte{1}), stackitem.NewByteArray([]byte{2}))
getName := func(item stackitem.Item, typ stackitem.Type) string {
return fmt.Sprintf("%s->%s", item, typ)
}
t.Run("->Bool", func(t *testing.T) {
testBool := func(a, b stackitem.Item) func(t *testing.T) {
return testCONVERT(stackitem.BooleanT, a, b)
}
trueCases := []stackitem.Item{
stackitem.NewBool(true), stackitem.NewBigInteger(big.NewInt(11)), stackitem.NewByteArray([]byte{1, 2, 3}),
stackitem.NewArray(arr), stackitem.NewArray(nil),
stackitem.NewStruct(arr), stackitem.NewStruct(nil),
stackitem.NewMap(), m, stackitem.NewInterop(struct{}{}),
stackitem.NewPointer(0, []byte{}),
}
for i := range trueCases {
t.Run(getName(trueCases[i], stackitem.BooleanT), testBool(trueCases[i], stackitem.NewBool(true)))
}
falseCases := []stackitem.Item{
stackitem.NewBigInteger(big.NewInt(0)), stackitem.NewByteArray([]byte{0, 0}), stackitem.NewBool(false),
}
for i := range falseCases {
testBool(falseCases[i], stackitem.NewBool(false))
}
})
t.Run("compound/interop -> basic", func(t *testing.T) {
types := []stackitem.Type{stackitem.IntegerT, stackitem.ByteArrayT}
items := []stackitem.Item{stackitem.NewArray(nil), stackitem.NewStruct(nil), stackitem.NewMap(), stackitem.NewInterop(struct{}{})}
for _, typ := range types {
for j := range items {
t.Run(getName(items[j], typ), testCONVERT(typ, items[j], nil))
}
}
})
t.Run("primitive -> Integer/ByteArray", func(t *testing.T) {
n := big.NewInt(42)
b := bigint.ToBytes(n)
itemInt := stackitem.NewBigInteger(n)
itemBytes := stackitem.NewByteArray(b)
trueCases := map[stackitem.Type][]convertTC{
stackitem.IntegerT: {
{itemInt, itemInt},
{itemBytes, itemInt},
{stackitem.NewBool(true), stackitem.NewBigInteger(big.NewInt(1))},
{stackitem.NewBool(false), stackitem.NewBigInteger(big.NewInt(0))},
},
stackitem.ByteArrayT: {
{itemInt, itemBytes},
{itemBytes, itemBytes},
{stackitem.NewBool(true), stackitem.NewByteArray([]byte{1})},
{stackitem.NewBool(false), stackitem.NewByteArray([]byte{0})},
},
}
for typ := range trueCases {
for _, tc := range trueCases[typ] {
t.Run(getName(tc.item, typ), testCONVERT(typ, tc.item, tc.res))
}
}
})
t.Run("Struct<->Array", func(t *testing.T) {
arrayItem := stackitem.NewArray(arr)
structItem := stackitem.NewStruct(arr)
t.Run("Array->Array", testCONVERT(stackitem.ArrayT, arrayItem, arrayItem))
t.Run("Array->Struct", testCONVERT(stackitem.StructT, arrayItem, structItem))
t.Run("Struct->Array", testCONVERT(stackitem.ArrayT, structItem, arrayItem))
t.Run("Struct->Struct", testCONVERT(stackitem.StructT, structItem, structItem))
})
t.Run("Map->Map", testCONVERT(stackitem.MapT, m, m))
ptr := stackitem.NewPointer(1, []byte{1})
t.Run("Pointer->Pointer", testCONVERT(stackitem.PointerT, ptr, ptr))
t.Run("Null->", func(t *testing.T) {
types := []stackitem.Type{
stackitem.BooleanT, stackitem.ByteArrayT, stackitem.IntegerT, stackitem.ArrayT, stackitem.StructT, stackitem.MapT, stackitem.InteropT, stackitem.PointerT,
}
for i := range types {
t.Run(types[i].String(), testCONVERT(types[i], stackitem.Null{}, stackitem.Null{}))
}
})
t.Run("->Any", func(t *testing.T) {
items := []stackitem.Item{
stackitem.NewBigInteger(big.NewInt(1)), stackitem.NewByteArray([]byte{1}), stackitem.NewBool(true),
stackitem.NewArray(arr), stackitem.NewStruct(arr), m, stackitem.NewInterop(struct{}{}),
}
for i := range items {
t.Run(items[i].String(), testCONVERT(stackitem.AnyT, items[i], nil))
}
})
}
// appendBigStruct returns a program which:
// 1. pushes size Structs on stack
// 2. packs them into a new struct
// 3. appends them to a zero-length array
// Resulting stack size consists of:
// - struct (size+1)
// - array (1) of struct (size+1)
// which equals to size*2+3 elements in total.
func appendBigStruct(size uint16) []opcode.Opcode {
prog := make([]opcode.Opcode, size*2)
for i := range size {
prog[i*2] = opcode.PUSH0
prog[i*2+1] = opcode.NEWSTRUCT
}
return append(prog,
opcode.INITSSLOT, 1,
opcode.PUSHINT16, opcode.Opcode(size), opcode.Opcode(size>>8), // LE
opcode.PACK, opcode.CONVERT, opcode.Opcode(stackitem.StructT),
opcode.STSFLD0, opcode.LDSFLD0,
opcode.DUP,
opcode.PUSH0, opcode.NEWARRAY,
opcode.SWAP,
opcode.APPEND, opcode.RET)
}
func TestStackLimitAPPENDStructGood(t *testing.T) {
prog := makeProgram(appendBigStruct(MaxStackSize/2 - 2)...)
v := load(prog)
runVM(t, v) // size = 2047 = (Max/2-2)*2+3 = Max-1
}
func TestStackLimitAPPENDStructBad(t *testing.T) {
prog := makeProgram(appendBigStruct(MaxStackSize/2 - 1)...)
v := load(prog)
checkVMFailed(t, v) // size = 2049 = (Max/2-1)*2+3 = Max+1
}
func TestStackLimit(t *testing.T) {
expected := []struct {
inst opcode.Opcode
size int
}{
{opcode.PUSH2, 2}, // 1 from INITSSLOT and 1 for integer 2
{opcode.NEWARRAY, 4}, // array + 2 items
{opcode.STSFLD0, 3},
{opcode.LDSFLD0, 4},
{opcode.NEWMAP, 5},
{opcode.DUP, 6},
{opcode.PUSH2, 7},
{opcode.LDSFLD0, 8},
{opcode.SETITEM, 7}, // -3 items and 1 new kv pair in map
{opcode.DUP, 8},
{opcode.PUSH2, 9},
{opcode.LDSFLD0, 10},
{opcode.SETITEM, 7}, // -3 items and no new elements in map
{opcode.DUP, 8},
{opcode.PUSH2, 9},
{opcode.REMOVE, 5}, // as we have right after NEWMAP
{opcode.DROP, 4}, // DROP map with no elements
}
prog := make([]opcode.Opcode, len(expected)+2)
prog[0] = opcode.INITSSLOT
prog[1] = 1
for i := range expected {
prog[i+2] = expected[i].inst
}
vm := load(makeProgram(prog...))
require.NoError(t, vm.Step(), "failed to initialize static slot")
for i := range expected {
require.NoError(t, vm.Step())
require.Equal(t, expected[i].size, int(vm.refs), "i: %d", i)
}
}
func TestPushm1to16(t *testing.T) {
var prog []byte
for i := int(opcode.PUSHM1); i <= int(opcode.PUSH16); i++ {
if i == 80 {
continue // opcode layout we got here.
}
prog = append(prog, byte(i))
}
vm := load(prog)
for i := int(opcode.PUSHM1); i <= int(opcode.PUSH16); i++ {
err := vm.Step()
require.NoError(t, err)
elem := vm.estack.Pop()
val := i - int(opcode.PUSH1) + 1
assert.Equal(t, elem.BigInt().Int64(), int64(val))
}
}
func TestPUSHDATA1(t *testing.T) {
t.Run("Good", getTestFuncForVM([]byte{byte(opcode.PUSHDATA1), 3, 1, 2, 3}, []byte{1, 2, 3}))
t.Run("NoN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA1)}, nil))
t.Run("BadN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA1), 1}, nil))
}
func TestPUSHDATA2(t *testing.T) {
t.Run("Good", getTestFuncForVM([]byte{byte(opcode.PUSHDATA2), 3, 0, 1, 2, 3}, []byte{1, 2, 3}))
t.Run("NoN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA2)}, nil))
t.Run("ShortN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA2), 0}, nil))
t.Run("BadN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA2), 1, 0}, nil))
}
func TestPUSHDATA4(t *testing.T) {
t.Run("Good", getTestFuncForVM([]byte{byte(opcode.PUSHDATA4), 3, 0, 0, 0, 1, 2, 3}, []byte{1, 2, 3}))
t.Run("NoN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA4)}, nil))
t.Run("BadN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA4), 1, 0, 0, 0}, nil))
t.Run("ShortN", getTestFuncForVM([]byte{byte(opcode.PUSHDATA4), 0, 0, 0}, nil))
}
func TestPushData4BigN(t *testing.T) {
prog := make([]byte, 1+4+stackitem.MaxSize+1)
prog[0] = byte(opcode.PUSHDATA4)
binary.LittleEndian.PutUint32(prog[1:], stackitem.MaxSize+1)
vm := load(prog)
checkVMFailed(t, vm)
}
func getTestCallFlagsFunc(syscall []byte, flags callflag.CallFlag, result any) func(t *testing.T) {
return func(t *testing.T) {
script := append([]byte{byte(opcode.SYSCALL)}, syscall...)
v := newTestVM()
v.SyscallHandler = testSyscallHandler
v.LoadScriptWithFlags(script, flags)
if result == nil {
checkVMFailed(t, v)
return
}
runVM(t, v)
require.Equal(t, result, v.PopResult())
}
}
func TestCallFlags(t *testing.T) {
noFlags := []byte{0x77, 0x77, 0x77, 0x77}
readOnly := []byte{0x66, 0x66, 0x66, 0x66}
t.Run("NoFlagsNoRequired", getTestCallFlagsFunc(noFlags, callflag.NoneFlag, new(int)))
t.Run("ProvideFlagsNoRequired", getTestCallFlagsFunc(noFlags, callflag.AllowCall, new(int)))
t.Run("NoFlagsSomeRequired", getTestCallFlagsFunc(readOnly, callflag.NoneFlag, nil))
t.Run("OnlyOneProvided", getTestCallFlagsFunc(readOnly, callflag.AllowCall, nil))
t.Run("AllFlagsProvided", getTestCallFlagsFunc(readOnly, callflag.ReadOnly, new(int)))
}
func callNTimes(n uint16) []byte {
return makeProgram(
opcode.PUSHINT16, opcode.Opcode(n), opcode.Opcode(n>>8), // little-endian
opcode.INITSSLOT, 1,
opcode.STSFLD0, opcode.LDSFLD0,
opcode.JMPIF, 0x3, opcode.RET,
opcode.LDSFLD0, opcode.DEC,
opcode.CALL, 0xF9) // -7 -> JMP to TOALTSTACK)
}
func TestInvocationLimitGood(t *testing.T) {
prog := callNTimes(MaxInvocationStackSize - 1)
v := load(prog)
runVM(t, v)
}
func TestInvocationLimitBad(t *testing.T) {
prog := callNTimes(MaxInvocationStackSize)
v := load(prog)
checkVMFailed(t, v)
}
func isLongJMP(op opcode.Opcode) bool {
return op == opcode.JMPL || op == opcode.JMPIFL || op == opcode.JMPIFNOTL ||
op == opcode.JMPEQL || op == opcode.JMPNEL ||
op == opcode.JMPGEL || op == opcode.JMPGTL ||
op == opcode.JMPLEL || op == opcode.JMPLTL
}
func getJMPProgram(op opcode.Opcode) []byte {
prog := []byte{byte(op)}
if isLongJMP(op) {
prog = append(prog, 0x07, 0x00, 0x00, 0x00)
} else {
prog = append(prog, 0x04)
}
return append(prog, byte(opcode.PUSH1), byte(opcode.RET), byte(opcode.PUSH2), byte(opcode.RET))
}
func testJMP(t *testing.T, op opcode.Opcode, res any, items ...any) {
prog := getJMPProgram(op)
v := load(prog)
for i := range items {
v.estack.PushVal(items[i])
}
if res == nil {
checkVMFailed(t, v)
return
}
runVM(t, v)
require.EqualValues(t, res, v.estack.Pop().BigInt().Int64())
}
func TestJMPs(t *testing.T) {
testCases := []struct {
name string
items []any
}{
{
name: "no condition",
},
{
name: "single item (true)",
items: []any{true},
},
{
name: "single item (false)",
items: []any{false},
},
{
name: "24 and 42",
items: []any{24, 42},
},
{
name: "42 and 24",
items: []any{42, 24},
},
{
name: "42 and 42",
items: []any{42, 42},
},
}
// 2 is true, 1 is false
results := map[opcode.Opcode][]any{
opcode.JMP: {2, 2, 2, 2, 2, 2},
opcode.JMPIF: {nil, 2, 1, 2, 2, 2},
opcode.JMPIFNOT: {nil, 1, 2, 1, 1, 1},
opcode.JMPEQ: {nil, nil, nil, 1, 1, 2},
opcode.JMPNE: {nil, nil, nil, 2, 2, 1},
opcode.JMPGE: {nil, nil, nil, 1, 2, 2},
opcode.JMPGT: {nil, nil, nil, 1, 2, 1},
opcode.JMPLE: {nil, nil, nil, 2, 1, 2},
opcode.JMPLT: {nil, nil, nil, 2, 1, 1},
}
for i, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
for op := opcode.JMP; op < opcode.JMPLEL; op++ {
resOp := op
if isLongJMP(op) {
resOp--
}
t.Run(op.String(), func(t *testing.T) {
testJMP(t, op, results[resOp][i], tc.items...)
})
}
})
}
}
func TestPUSHA(t *testing.T) {
t.Run("Negative", getTestFuncForVM(makeProgram(opcode.PUSHA, 0xFF, 0xFF, 0xFF, 0xFF), nil))
t.Run("TooBig", getTestFuncForVM(makeProgram(opcode.PUSHA, 10, 0, 0, 0), nil))
t.Run("Good", func(t *testing.T) {
prog := makeProgram(opcode.NOP, opcode.PUSHA, 2, 0, 0, 0)
runWithArgs(t, prog, stackitem.NewPointer(3, prog))
})
}
func TestCALLA(t *testing.T) {
prog := makeProgram(opcode.CALLA, opcode.PUSH2, opcode.ADD, opcode.RET, opcode.PUSH3, opcode.RET)
t.Run("InvalidScript", getTestFuncForVM(prog, nil, stackitem.NewPointer(4, []byte{1})))
t.Run("Good", getTestFuncForVM(prog, 5, stackitem.NewPointer(4, prog)))
}
func TestCALL(t *testing.T) {
prog := makeProgram(
opcode.CALL, 4, opcode.ADD, opcode.RET,
opcode.CALL, 3, opcode.RET,
opcode.PUSH1, opcode.PUSH2, opcode.RET)
runWithArgs(t, prog, 3)
}
func TestNOT(t *testing.T) {
prog := makeProgram(opcode.NOT)
t.Run("Bool", getTestFuncForVM(prog, true, false))
t.Run("NonZeroInt", getTestFuncForVM(prog, false, 3))
t.Run("Array", getTestFuncForVM(prog, false, []stackitem.Item{}))
t.Run("Struct", getTestFuncForVM(prog, false, stackitem.NewStruct([]stackitem.Item{})))
t.Run("ByteArray0", getTestFuncForVM(prog, true, []byte{0, 0}))
t.Run("ByteArray1", getTestFuncForVM(prog, false, []byte{0, 1}))
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("Buffer0", getTestFuncForVM(prog, false, stackitem.NewBuffer([]byte{})))
t.Run("Buffer1", getTestFuncForVM(prog, false, stackitem.NewBuffer([]byte{1})))
}
// getBigInt returns 2^a+b.
func getBigInt(a, b int64) *big.Int {
p := new(big.Int).Exp(big.NewInt(2), big.NewInt(a), nil)
p.Add(p, big.NewInt(b))
return p
}
func TestArith(t *testing.T) {
// results for 5 and 2
testCases := map[opcode.Opcode]int{
opcode.ADD: 7,
opcode.MUL: 10,
opcode.DIV: 2,
opcode.MOD: 1,
opcode.SUB: 3,
}
for op, res := range testCases {
t.Run(op.String(), getTestFuncForVM(makeProgram(op), res, 5, 2))
}
}
func TestADDBigResult(t *testing.T) {
prog := makeProgram(opcode.ADD)
runWithArgs(t, prog, nil, getBigInt(stackitem.MaxBigIntegerSizeBits-1, -1), 1) // 0x7FFF...
}
func TestMULBigResult(t *testing.T) {
prog := makeProgram(opcode.MUL)
bi := getBigInt(stackitem.MaxBigIntegerSizeBits/2+1, 0)
runWithArgs(t, prog, nil, bi, bi)
}
func TestArithNegativeArguments(t *testing.T) {
runCase := func(op opcode.Opcode, p, q, result int64) func(t *testing.T) {
return getTestFuncForVM(makeProgram(op), result, p, q)
}
t.Run("DIV", func(t *testing.T) {
t.Run("positive/positive", runCase(opcode.DIV, 5, 2, 2))
t.Run("positive/negative", runCase(opcode.DIV, 5, -2, -2))
t.Run("negative/positive", runCase(opcode.DIV, -5, 2, -2))
t.Run("negative/negative", runCase(opcode.DIV, -5, -2, 2))
})
t.Run("MOD", func(t *testing.T) {
t.Run("positive/positive", runCase(opcode.MOD, 5, 2, 1))
t.Run("positive/negative", runCase(opcode.MOD, 5, -2, 1))
t.Run("negative/positive", runCase(opcode.MOD, -5, 2, -1))
t.Run("negative/negative", runCase(opcode.MOD, -5, -2, -1))
})
t.Run("SHR", func(t *testing.T) {
t.Run("positive/positive", runCase(opcode.SHR, 5, 2, 1))
t.Run("negative/positive", runCase(opcode.SHR, -5, 2, -2))
})
t.Run("SHL", func(t *testing.T) {
t.Run("positive/positive", runCase(opcode.SHL, 5, 2, 20))
t.Run("negative/positive", runCase(opcode.SHL, -5, 2, -20))
})
}
func TestSUBBigResult(t *testing.T) {
prog := makeProgram(opcode.SUB)
bi := getBigInt(stackitem.MaxBigIntegerSizeBits-1, -1)
runWithArgs(t, prog, new(big.Int).Sub(big.NewInt(-1), bi), -1, bi)
runWithArgs(t, prog, nil, -2, bi)
}
func TestPOW(t *testing.T) {
prog := makeProgram(opcode.POW)
t.Run("good, positive", getTestFuncForVM(prog, 9, 3, 2))
t.Run("good, negative, even", getTestFuncForVM(prog, 4, -2, 2))
t.Run("good, negative, odd", getTestFuncForVM(prog, -8, -2, 3))
t.Run("zero", getTestFuncForVM(prog, 1, 3, 0))
t.Run("negative exponent", getTestFuncForVM(prog, nil, 3, -1))
t.Run("too big exponent", getTestFuncForVM(prog, nil, 1, maxSHLArg+1))
}
func TestSQRT(t *testing.T) {
prog := makeProgram(opcode.SQRT)
t.Run("good, positive", getTestFuncForVM(prog, 3, 9))
t.Run("good, round down", getTestFuncForVM(prog, 2, 8))
t.Run("one", getTestFuncForVM(prog, 1, 1))
t.Run("zero", getTestFuncForVM(prog, 0, 0))
t.Run("negative value", getTestFuncForVM(prog, nil, -1))
}
func TestMODMUL(t *testing.T) {
prog := makeProgram(opcode.MODMUL)
t.Run("bad, zero mod", getTestFuncForVM(prog, nil, 1, 2, 0))
t.Run("good, positive base", getTestFuncForVM(prog, 2, 3, 4, 5))
t.Run("good, zero base", getTestFuncForVM(prog, 0, 0, 4, 5))
t.Run("good, negative base", getTestFuncForVM(prog, -2, -3, 4, 5))
t.Run("good, positive base, negative mod", getTestFuncForVM(prog, 2, 3, 4, -5))
t.Run("good, negative base, negative mod", getTestFuncForVM(prog, -2, -3, 4, -5))
t.Run("good, positive base, negative multiplier, negative mod", getTestFuncForVM(prog, -9, 100, -1, -91))
}
func TestMODPOW(t *testing.T) {
prog := makeProgram(opcode.MODPOW)
t.Run("good, positive base", getTestFuncForVM(prog, 1, 3, 4, 5))
t.Run("good, negative base", getTestFuncForVM(prog, 2, -3, 5, 5))
t.Run("good, positive base, negative mod", getTestFuncForVM(prog, 1, 3, 4, -5))
t.Run("good, negative base, negative mod", getTestFuncForVM(prog, 2, -3, 5, -5))
t.Run("bad, big negative exponent", getTestFuncForVM(prog, nil, 3, -2, 5))
t.Run("bad, zero modulus", getTestFuncForVM(prog, nil, 3, 4, 0))
t.Run("inverse compatibility", func(t *testing.T) { // Tests are taken from C# node.
t.Run("bad mod", getTestFuncForVM(prog, nil, 1, -1, 0))
t.Run("bad mod", getTestFuncForVM(prog, nil, 1, -1, 1))
t.Run("bad base", getTestFuncForVM(prog, nil, 0, -1, 0))
t.Run("bad base", getTestFuncForVM(prog, nil, 0, -1, 1))
t.Run("no inverse exists", getTestFuncForVM(prog, nil, math.MaxUint16, -1, math.MaxUint8))
t.Run("good", getTestFuncForVM(prog, 52, 19, -1, 141))
})
}
func TestSHR(t *testing.T) {
prog := makeProgram(opcode.SHR)
t.Run("Good", getTestFuncForVM(prog, 1, 4, 2))
t.Run("Zero", getTestFuncForVM(prog, []byte{0, 1}, []byte{0, 1}, 0))
t.Run("Negative", getTestFuncForVM(prog, nil, 5, -1))
t.Run("very big", getTestFuncForVM(prog, nil, 5, maxu64Plus(1)))
}
func TestSHL(t *testing.T) {
prog := makeProgram(opcode.SHL)
t.Run("Good", getTestFuncForVM(prog, 16, 4, 2))
t.Run("Zero", getTestFuncForVM(prog, []byte{0, 1}, []byte{0, 1}, 0))
t.Run("BigShift", getTestFuncForVM(prog, nil, 5, maxSHLArg+1))
t.Run("BigResult", getTestFuncForVM(prog, nil, getBigInt(stackitem.MaxBigIntegerSizeBits/2, 0), stackitem.MaxBigIntegerSizeBits/2))
t.Run("very big shift", getTestFuncForVM(prog, nil, 5, maxu64Plus(1)))
}
func TestArithNullArg(t *testing.T) {
for _, op := range []opcode.Opcode{opcode.LT, opcode.LE, opcode.GT, opcode.GE} {
prog := makeProgram(op)
t.Run(op.String(), func(t *testing.T) {
runWithArgs(t, prog, false, stackitem.Null{}, 0)
runWithArgs(t, prog, false, 0, stackitem.Null{})
runWithArgs(t, prog, nil, stackitem.NewInterop(nil), 1) // also has `.Value() == nil`
})
}
}
func TestLT(t *testing.T) {
prog := makeProgram(opcode.LT)
runWithArgs(t, prog, false, 4, 3)
}
func TestLE(t *testing.T) {
prog := makeProgram(opcode.LE)
runWithArgs(t, prog, true, 2, 3)
}
func TestGT(t *testing.T) {
prog := makeProgram(opcode.GT)
runWithArgs(t, prog, true, 9, 3)
}
func TestGE(t *testing.T) {
prog := makeProgram(opcode.GE)
runWithArgs(t, prog, true, 3, 3)
}
func TestDepth(t *testing.T) {
prog := makeProgram(opcode.DEPTH)
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushVal(2)
vm.estack.PushVal(3)
runVM(t, vm)
assert.Equal(t, int64(3), vm.estack.Pop().BigInt().Int64())
}
type simpleEquatable struct {
ok bool
}
var _ = stackitem.Equatable(simpleEquatable{})
func (e simpleEquatable) Equals(other stackitem.Equatable) bool {
_, ok := other.(simpleEquatable)
return ok && e.ok
}
func TestEQUALTrue(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.EQUAL)
t.Run("Array", getTestFuncForVM(prog, true, []stackitem.Item{}))
t.Run("Map", getTestFuncForVM(prog, true, stackitem.NewMap()))
t.Run("Buffer", getTestFuncForVM(prog, true, stackitem.NewBuffer([]byte{1, 2})))
t.Run("Equatable", getTestFuncForVM(prog, true, stackitem.NewInterop(simpleEquatable{ok: true})))
}
func TestEQUAL(t *testing.T) {
prog := makeProgram(opcode.EQUAL)
t.Run("NoArgs", getTestFuncForVM(prog, nil))
t.Run("OneArgument", getTestFuncForVM(prog, nil, 1))
t.Run("Integer", getTestFuncForVM(prog, true, 5, 5))
t.Run("IntegerByteArray", getTestFuncForVM(prog, false, []byte{16}, 16))
t.Run("BooleanInteger", getTestFuncForVM(prog, false, true, 1))
t.Run("Map", getTestFuncForVM(prog, false, stackitem.NewMap(), stackitem.NewMap()))
t.Run("Array", getTestFuncForVM(prog, false, []stackitem.Item{}, []stackitem.Item{}))
t.Run("Buffer", getTestFuncForVM(prog, false, stackitem.NewBuffer([]byte{42}), stackitem.NewBuffer([]byte{42})))
t.Run("EquatableFalse", getTestFuncForVM(prog, false, stackitem.NewInterop(simpleEquatable{false}), stackitem.NewInterop(simpleEquatable{})))
t.Run("EquatableTrue", getTestFuncForVM(prog, true, stackitem.NewInterop(simpleEquatable{true}), stackitem.NewInterop(simpleEquatable{})))
}
func TestEQUALByteArrayWithLimit(t *testing.T) {
prog := makeProgram(opcode.EQUAL)
t.Run("fits limit, equal", func(t *testing.T) {
args := make([]stackitem.Item, 2)
for i := range args {
args[i] = stackitem.NewStruct([]stackitem.Item{
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize/2)),
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize/2)),
})
}
getTestFuncForVM(prog, true, args[0], args[1])(t)
})
t.Run("exceeds limit", func(t *testing.T) {
args := make([]stackitem.Item, 2)
for i := range args {
args[i] = stackitem.NewStruct([]stackitem.Item{
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize/2+1)),
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize/2)),
})
}
getTestFuncForVM(prog, nil, args[0], args[1])(t) // should FAULT due to comparable limit exceeding
})
t.Run("fits limit, second elements are not equal", func(t *testing.T) {
args := make([]stackitem.Item, 2)
for i := range args {
args[i] = stackitem.NewStruct([]stackitem.Item{
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize-1)),
stackitem.NewBuffer(make([]byte, 1)),
})
}
getTestFuncForVM(prog, false, args[0], args[1])(t) // no limit is exceeded, but the second struct item is a Buffer.
})
t.Run("fits limit, equal", func(t *testing.T) {
args := make([]stackitem.Item, 2)
buf := stackitem.NewBuffer(make([]byte, 100500)) // takes only 1 comparable unit despite its length
for i := range args {
args[i] = stackitem.NewStruct([]stackitem.Item{
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize-1)),
buf,
})
}
getTestFuncForVM(prog, true, args[0], args[1])(t) // should HALT, because no limit exceeded
})
t.Run("exceeds limit, equal", func(t *testing.T) {
args := make([]stackitem.Item, 2)
buf := stackitem.NewBuffer(make([]byte, 100500)) // takes only 1 comparable unit despite its length
for i := range args {
args[i] = stackitem.NewStruct([]stackitem.Item{
stackitem.NewByteArray(make([]byte, stackitem.MaxByteArrayComparableSize-1)), // MaxByteArrayComparableSize-1 comparable units
buf, // 1 comparable unit
buf, // 1 comparable unit
})
}
getTestFuncForVM(prog, nil, args[0], args[1])(t) // should FAULT, because limit is exceeded:
})
}
func runWithArgs(t *testing.T, prog []byte, result any, args ...any) {
getTestFuncForVM(prog, result, args...)(t)
}
func getCustomTestFuncForVM(prog []byte, check func(t *testing.T, v *VM), args ...any) func(t *testing.T) {
return func(t *testing.T) {
v := load(prog)
for i := range args {
v.estack.PushVal(args[i])
}
if check == nil {
checkVMFailed(t, v)
return
}
runVM(t, v)
check(t, v)
}
}
func getTestFuncForVM(prog []byte, result any, args ...any) func(t *testing.T) {
var f func(t *testing.T, v *VM)
if result != nil {
f = func(t *testing.T, v *VM) {
require.Equal(t, 1, v.estack.Len())
require.Equal(t, stackitem.Make(result).Value(), v.estack.Pop().Value())
}
}
return getCustomTestFuncForVM(prog, f, args...)
}
func makeRETProgram(t *testing.T, argCount, localCount int) []byte {
require.True(t, argCount+localCount <= 255)
fProg := []opcode.Opcode{opcode.INITSLOT, opcode.Opcode(localCount), opcode.Opcode(argCount)}
for i := range localCount {
fProg = append(fProg, opcode.PUSH8, opcode.STLOC, opcode.Opcode(i))
}
fProg = append(fProg, opcode.RET)
offset := uint32(len(fProg) + 5)
param := make([]byte, 4)
binary.LittleEndian.PutUint32(param, offset)
ops := []opcode.Opcode{
opcode.INITSSLOT, 0x01,
opcode.PUSHA, 11, 0, 0, 0,
opcode.STSFLD0,
opcode.JMPL, opcode.Opcode(param[0]), opcode.Opcode(param[1]), opcode.Opcode(param[2]), opcode.Opcode(param[3]),
}
ops = append(ops, fProg...)
// execute func multiple times to ensure total reference count is less than max
callCount := MaxStackSize/(argCount+localCount) + 1
args := make([]opcode.Opcode, argCount)
for i := range args {
args[i] = opcode.PUSH7
}
for range callCount {
ops = append(ops, args...)
ops = append(ops, opcode.LDSFLD0, opcode.CALLA)
}
return makeProgram(ops...)
}
func TestRETReferenceClear(t *testing.T) {
// 42 is a canary
t.Run("Argument", getTestFuncForVM(makeRETProgram(t, 100, 0), 42, 42))
t.Run("Local", getTestFuncForVM(makeRETProgram(t, 0, 100), 42, 42))
}
func TestNOTEQUALByteArray(t *testing.T) {
prog := makeProgram(opcode.NOTEQUAL)
t.Run("True", getTestFuncForVM(prog, true, []byte{1, 2}, []byte{0, 1, 2}))
t.Run("False", getTestFuncForVM(prog, false, []byte{1, 2}, []byte{1, 2}))
}
func TestNUMEQUAL(t *testing.T) {
prog := makeProgram(opcode.NUMEQUAL)
t.Run("True", getTestFuncForVM(prog, true, 2, 2))
t.Run("False", getTestFuncForVM(prog, false, 1, 2))
}
func TestNUMNOTEQUAL(t *testing.T) {
prog := makeProgram(opcode.NUMNOTEQUAL)
t.Run("True", getTestFuncForVM(prog, true, 1, 2))
t.Run("False", getTestFuncForVM(prog, false, 2, 2))
}
func TestINC(t *testing.T) {
prog := makeProgram(opcode.INC)
runWithArgs(t, prog, 2, 1)
}
func TestINCBigResult(t *testing.T) {
prog := makeProgram(opcode.INC, opcode.INC)
vm := load(prog)
x := getBigInt(stackitem.MaxBigIntegerSizeBits-1, -2)
vm.estack.PushVal(x)
require.NoError(t, vm.Step())
require.False(t, vm.HasFailed())
require.Equal(t, 1, vm.estack.Len())
require.Equal(t, new(big.Int).Add(x, big.NewInt(1)), vm.estack.Top().BigInt())
checkVMFailed(t, vm)
}
func TestDECBigResult(t *testing.T) {
prog := makeProgram(opcode.DEC, opcode.DEC)
vm := load(prog)
x := getBigInt(stackitem.MaxBigIntegerSizeBits-1, -1)
x.Neg(x)
vm.estack.PushVal(x)
require.NoError(t, vm.Step())
require.False(t, vm.HasFailed())
require.Equal(t, 1, vm.estack.Len())
require.Equal(t, new(big.Int).Sub(x, big.NewInt(1)), vm.estack.Top().BigInt())
checkVMFailed(t, vm)
}
func TestNEWBUFFER(t *testing.T) {
prog := makeProgram(opcode.NEWBUFFER)
t.Run("Good", getTestFuncForVM(prog, stackitem.NewBuffer([]byte{0, 0, 0}), 3))
t.Run("Negative", getTestFuncForVM(prog, nil, -1))
t.Run("TooBig", getTestFuncForVM(prog, nil, stackitem.MaxSize+1))
}
func getTRYProgram(tryBlock, catchBlock, finallyBlock []byte) []byte {
hasCatch := catchBlock != nil
hasFinally := finallyBlock != nil
tryOffset := len(tryBlock) + 3 + 2 // try args + endtry args
var (
catchLen, finallyLen int
catchOffset, finallyOffset int
)
if hasCatch {
catchLen = len(catchBlock) + 2 // endtry args
catchOffset = tryOffset
}
if hasFinally {
finallyLen = len(finallyBlock) + 1 // endfinally
finallyOffset = tryOffset + catchLen
}
prog := []byte{byte(opcode.TRY), byte(catchOffset), byte(finallyOffset)}
prog = append(prog, tryBlock...)
prog = append(prog, byte(opcode.ENDTRY), byte(catchLen+finallyLen+2))
if hasCatch {
prog = append(prog, catchBlock...)
prog = append(prog, byte(opcode.ENDTRY), byte(finallyLen+2))
}
if hasFinally {
prog = append(prog, finallyBlock...)
prog = append(prog, byte(opcode.ENDFINALLY))
}
prog = append(prog, byte(opcode.RET))
return prog
}
func getTRYTestFunc(result any, tryBlock, catchBlock, finallyBlock []byte) func(t *testing.T) {
return func(t *testing.T) {
prog := getTRYProgram(tryBlock, catchBlock, finallyBlock)
runWithArgs(t, prog, result)
}
}
func TestTRY(t *testing.T) {
throw := []byte{byte(opcode.PUSH13), byte(opcode.THROW)}
push1 := []byte{byte(opcode.PUSH1)}
add5 := []byte{byte(opcode.PUSH5), byte(opcode.ADD)}
add9 := []byte{byte(opcode.PUSH9), byte(opcode.ADD)}
t.Run("NoCatch", func(t *testing.T) {
t.Run("NoFinally", func(t *testing.T) {
prog := getTRYProgram(push1, nil, nil)
vm := load(prog)
checkVMFailed(t, vm)
})
t.Run("WithFinally", getTRYTestFunc(10, push1, nil, add9))
t.Run("Throw", getTRYTestFunc(nil, throw, nil, add9))
})
t.Run("WithCatch", func(t *testing.T) {
t.Run("NoFinally", func(t *testing.T) {
t.Run("Simple", getTRYTestFunc(1, push1, add5, nil))
t.Run("Throw", getTRYTestFunc(18, throw, add5, nil))
t.Run("Abort", getTRYTestFunc(nil, []byte{byte(opcode.ABORT)}, push1, nil))
t.Run("AbortMSG", getTRYTestFunc(nil, []byte{byte(opcode.PUSH1), byte(opcode.ABORTMSG)}, push1, nil))
t.Run("ThrowInCatch", getTRYTestFunc(nil, throw, throw, nil))
})
t.Run("WithFinally", func(t *testing.T) {
t.Run("Simple", getTRYTestFunc(10, push1, add5, add9))
t.Run("Throw", getTRYTestFunc(27, throw, add5, add9))
})
})
t.Run("Nested", func(t *testing.T) {
t.Run("ReThrowInTry", func(t *testing.T) {
inner := getTRYProgram(throw, []byte{byte(opcode.THROW)}, nil)
getTRYTestFunc(27, inner, add5, add9)(t)
})
t.Run("ThrowInFinally", func(t *testing.T) {
inner := getTRYProgram(throw, add5, []byte{byte(opcode.THROW)})
getTRYTestFunc(32, inner, add5, add9)(t)
})
t.Run("TryMaxDepth", func(t *testing.T) {
loopTries := []byte{byte(opcode.INITSLOT), 0x01, 0x00,
byte(opcode.PUSH16), byte(opcode.INC), byte(opcode.STLOC0),
byte(opcode.TRY), 1, 1, // jump target
byte(opcode.LDLOC0), byte(opcode.DEC), byte(opcode.DUP),
byte(opcode.STLOC0), byte(opcode.PUSH0),
byte(opcode.JMPGT), 0xf8, byte(opcode.LDLOC0)}
vm := load(loopTries)
checkVMFailed(t, vm)
})
})
t.Run("ThrowInCall", func(t *testing.T) {
catchP := []byte{byte(opcode.CALL), 2, byte(opcode.PUSH1), byte(opcode.ADD), byte(opcode.THROW), byte(opcode.RET)}
inner := getTRYProgram(throw, catchP, []byte{byte(opcode.PUSH2)})
// add 5 to the exception, mul to the result of inner finally (2)
getTRYTestFunc(47, inner, append(add5, byte(opcode.MUL)), add9)(t)
})
t.Run("nested, in throw and catch in call", func(t *testing.T) {
catchP := []byte{byte(opcode.PUSH10), byte(opcode.ADD)}
inner := getTRYProgram(throw, catchP, []byte{byte(opcode.PUSH2)})
outer := getTRYProgram([]byte{byte(opcode.CALL), 0}, []byte{byte(opcode.PUSH3)}, []byte{byte(opcode.PUSH4)})
outer = append(outer, byte(opcode.RET))
outer[4] = byte(len(outer) - 3) // CALL argument at 3 (TRY) + 1 (CALL opcode)
outer = append(outer, inner...)
outer = append(outer, byte(opcode.RET))
v := load(outer)
runVM(t, v)
require.Equal(t, 3, v.Estack().Len())
require.Equal(t, big.NewInt(4), v.Estack().Pop().Value()) // outer FINALLY
require.Equal(t, big.NewInt(2), v.Estack().Pop().Value()) // inner FINALLY
require.Equal(t, big.NewInt(23), v.Estack().Pop().Value()) // inner THROW + CATCH
})
}
func TestMEMCPY(t *testing.T) {
prog := makeProgram(opcode.MEMCPY)
t.Run("Good", func(t *testing.T) {
buf := stackitem.NewBuffer([]byte{0, 1, 2, 3})
runWithArgs(t, prog, stackitem.NewBuffer([]byte{0, 6, 7, 3}), buf, buf, 1, []byte{4, 5, 6, 7}, 2, 2)
})
t.Run("NonZeroDstIndex", func(t *testing.T) {
buf := stackitem.NewBuffer([]byte{0, 1, 2})
runWithArgs(t, prog, stackitem.NewBuffer([]byte{0, 6, 7}), buf, buf, 1, []byte{4, 5, 6, 7}, 2, 2)
})
t.Run("NegativeSize", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{0, 1}), 0, []byte{2}, 0, -1))
t.Run("NegativeSrcIndex", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{0, 1}), 0, []byte{2}, -1, 1))
t.Run("NegativeDstIndex", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{0, 1}), -1, []byte{2}, 0, 1))
t.Run("BigSizeSrc", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{0, 1}), 0, []byte{2}, 0, 2))
t.Run("BigSizeDst", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{0, 1}), 0, []byte{2, 3, 4}, 0, 3))
}
func TestNEWARRAY0(t *testing.T) {
prog := makeProgram(opcode.NEWARRAY0)
runWithArgs(t, prog, []stackitem.Item{})
}
func TestNEWSTRUCT0(t *testing.T) {
prog := makeProgram(opcode.NEWSTRUCT0)
runWithArgs(t, prog, stackitem.NewStruct([]stackitem.Item{}))
}
func TestNEWARRAYArray(t *testing.T) {
prog := makeProgram(opcode.NEWARRAY)
t.Run("ByteArray", getTestFuncForVM(prog, stackitem.NewArray([]stackitem.Item{}), []byte{}))
t.Run("BadSize", getTestFuncForVM(prog, nil, MaxStackSize+1))
t.Run("Integer", getTestFuncForVM(prog, []stackitem.Item{stackitem.Null{}}, 1))
}
func testNEWARRAYIssue437(t *testing.T, i1 opcode.Opcode, t2 stackitem.Type, appended bool) {
prog := makeProgram(
opcode.PUSH2, i1,
opcode.DUP, opcode.PUSH3, opcode.APPEND,
opcode.INITSSLOT, 1,
opcode.STSFLD0, opcode.LDSFLD0, opcode.CONVERT, opcode.Opcode(t2),
opcode.DUP, opcode.PUSH4, opcode.APPEND,
opcode.LDSFLD0, opcode.PUSH5, opcode.APPEND)
arr := makeArrayOfType(4, stackitem.AnyT)
arr[2] = stackitem.Make(3)
arr[3] = stackitem.Make(4)
if appended {
arr = append(arr, stackitem.Make(5))
}
if t2 == stackitem.ArrayT {
runWithArgs(t, prog, stackitem.NewArray(arr))
} else {
runWithArgs(t, prog, stackitem.NewStruct(arr))
}
}
func TestNEWARRAYIssue437(t *testing.T) {
t.Run("Array+Array", func(t *testing.T) { testNEWARRAYIssue437(t, opcode.NEWARRAY, stackitem.ArrayT, true) })
t.Run("Struct+Struct", func(t *testing.T) { testNEWARRAYIssue437(t, opcode.NEWSTRUCT, stackitem.StructT, true) })
t.Run("Array+Struct", func(t *testing.T) { testNEWARRAYIssue437(t, opcode.NEWARRAY, stackitem.StructT, false) })
t.Run("Struct+Array", func(t *testing.T) { testNEWARRAYIssue437(t, opcode.NEWSTRUCT, stackitem.ArrayT, false) })
}
func TestNEWARRAYT(t *testing.T) {
testCases := map[stackitem.Type]stackitem.Item{
stackitem.BooleanT: stackitem.NewBool(false),
stackitem.IntegerT: stackitem.NewBigInteger(big.NewInt(0)),
stackitem.ByteArrayT: stackitem.NewByteArray([]byte{}),
stackitem.ArrayT: stackitem.Null{},
0xFF: nil,
}
for typ, item := range testCases {
prog := makeProgram(opcode.NEWARRAYT, opcode.Opcode(typ), opcode.PUSH0, opcode.PICKITEM)
t.Run(typ.String(), getTestFuncForVM(prog, item, 1))
}
}
func TestNEWSTRUCT(t *testing.T) {
prog := makeProgram(opcode.NEWSTRUCT)
t.Run("ByteArray", getTestFuncForVM(prog, stackitem.NewStruct([]stackitem.Item{}), []byte{}))
t.Run("BadSize", getTestFuncForVM(prog, nil, MaxStackSize+1))
t.Run("Integer", getTestFuncForVM(prog, stackitem.NewStruct([]stackitem.Item{stackitem.Null{}}), 1))
}
func TestAPPEND(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.PUSH5, opcode.APPEND)
arr := []stackitem.Item{stackitem.Make(5)}
t.Run("Array", getTestFuncForVM(prog, stackitem.NewArray(arr), stackitem.NewArray(nil)))
t.Run("Struct", getTestFuncForVM(prog, stackitem.NewStruct(arr), stackitem.NewStruct(nil)))
}
func TestAPPENDCloneStruct(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.PUSH0, opcode.NEWSTRUCT, opcode.INITSSLOT, 1, opcode.STSFLD0,
opcode.LDSFLD0, opcode.APPEND, opcode.LDSFLD0, opcode.PUSH1, opcode.APPEND)
arr := []stackitem.Item{stackitem.NewStruct([]stackitem.Item{})}
runWithArgs(t, prog, stackitem.NewArray(arr), stackitem.NewArray(nil))
}
func TestAPPENDBad(t *testing.T) {
prog := makeProgram(opcode.APPEND)
t.Run("no arguments", getTestFuncForVM(prog, nil))
t.Run("one argument", getTestFuncForVM(prog, nil, 1))
t.Run("wrong type", getTestFuncForVM(prog, nil, []byte{}, 1))
}
func TestAPPENDGoodSizeLimit(t *testing.T) {
prog := makeProgram(opcode.NEWARRAY, opcode.DUP, opcode.PUSH0, opcode.APPEND)
vm := load(prog)
vm.estack.PushVal(MaxStackSize - 3) // 1 for array, 1 for copy, 1 for pushed 0.
runVM(t, vm)
assert.Equal(t, 1, vm.estack.Len())
assert.Equal(t, MaxStackSize-2, len(vm.estack.Pop().Array()))
}
func TestAPPENDBadSizeLimit(t *testing.T) {
prog := makeProgram(opcode.NEWARRAY, opcode.DUP, opcode.PUSH0, opcode.APPEND)
runWithArgs(t, prog, nil, MaxStackSize)
}
func TestAPPENDRefSizeLimit(t *testing.T) {
prog := makeProgram(opcode.NEWARRAY0, opcode.DUP, opcode.DUP, opcode.APPEND, opcode.JMP, 0xfd)
runWithArgs(t, prog, nil)
}
func TestPICKITEM(t *testing.T) {
prog := makeProgram(opcode.PICKITEM)
t.Run("bad index", getTestFuncForVM(prog, nil, []stackitem.Item{}, 0))
t.Run("Array", getTestFuncForVM(prog, 2, []stackitem.Item{stackitem.Make(1), stackitem.Make(2)}, 1))
t.Run("ByteArray", getTestFuncForVM(prog, 2, []byte{1, 2}, 1))
t.Run("Buffer", getTestFuncForVM(prog, 2, stackitem.NewBuffer([]byte{1, 2}), 1))
t.Run("Exceptions", func(t *testing.T) {
tryProg := getTRYProgram(
[]byte{byte(opcode.PICKITEM), byte(opcode.RET)},
[]byte{byte(opcode.RET)}, nil)
items := []stackitem.Item{
stackitem.NewArray([]stackitem.Item{}),
stackitem.NewBuffer([]byte{}),
stackitem.NewByteArray([]byte{}),
}
for _, item := range items {
t.Run(item.String()+", negative", getTestFuncForVM(tryProg,
fmt.Sprintf("The value %d is out of range.", math.MinInt32),
item, math.MinInt32))
t.Run(item.String()+", very big index",
getTestFuncForVM(tryProg, nil, item, int64(math.MaxInt32)+1))
}
m := stackitem.NewMap()
t.Run("Map, missing key", getTestFuncForVM(tryProg, "Key not found in Map", m, 1))
})
}
func TestVMPrintOps(t *testing.T) {
w := io.NewBufBinWriter()
emit.Bytes(w.BinWriter, make([]byte, 1000))
emit.Opcodes(w.BinWriter, opcode.PUSH0)
emit.Bytes(w.BinWriter, make([]byte, 8))
buf := bytes.NewBuffer(nil)
v := New()
v.Load(w.Bytes())
v.PrintOps(buf)
ss := strings.Split(buf.String(), "\n")
require.Equal(t, 5, len(ss)) // header + 3 opcodes + trailing newline
require.True(t, len(ss[0]) < 1000)
require.True(t, len(ss[1]) > 1000)
require.True(t, len(ss[2]) < 1000)
require.True(t, len(ss[3]) < 1000)
}
func TestPICKITEMDupArray(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.PUSH0, opcode.PICKITEM, opcode.ABS)
vm := load(prog)
vm.estack.PushVal([]stackitem.Item{stackitem.Make(-1)})
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, int64(1), vm.estack.Pop().BigInt().Int64())
items := vm.estack.Pop().Value().([]stackitem.Item)
assert.Equal(t, big.NewInt(-1), items[0].Value())
}
func TestPICKITEMDupMap(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.PUSHINT8, 42, opcode.PICKITEM, opcode.ABS)
vm := load(prog)
m := stackitem.NewMap()
m.Add(stackitem.Make(42), stackitem.Make(-1))
vm.estack.Push(Element{value: m})
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, int64(1), vm.estack.Pop().BigInt().Int64())
items := vm.estack.Pop().Value().([]stackitem.MapElement)
assert.Equal(t, 1, len(items))
assert.Equal(t, big.NewInt(42), items[0].Key.Value())
assert.Equal(t, big.NewInt(-1), items[0].Value.Value())
}
func TestPICKITEMMap(t *testing.T) {
prog := makeProgram(opcode.PICKITEM)
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make(3))
runWithArgs(t, prog, 3, m, 5)
}
func TestSETITEMBuffer(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.REVERSE4, opcode.SETITEM)
t.Run("Good", getTestFuncForVM(prog, stackitem.NewBuffer([]byte{0, 42, 2}), 42, 1, stackitem.NewBuffer([]byte{0, 1, 2})))
t.Run("BadValue", getTestFuncForVM(prog, nil, 256, 1, stackitem.NewBuffer([]byte{0, 1, 2})))
t.Run("Exceptions", func(t *testing.T) {
tryProg := getTRYProgram(
[]byte{byte(opcode.SETITEM), byte(opcode.PUSH12), byte(opcode.RET)},
[]byte{byte(opcode.RET)}, nil)
t.Run("negative index", getTestFuncForVM(tryProg,
fmt.Sprintf("The value %d is out of range.", math.MinInt32),
stackitem.NewBuffer([]byte{0, 1, 2}), math.MinInt32, 0))
t.Run("very big index", getTestFuncForVM(tryProg,
nil, stackitem.NewBuffer([]byte{0, 1, 2}), int64(math.MaxInt32)+1, 0))
})
}
func TestSETITEMArray(t *testing.T) {
tryProg := getTRYProgram(
[]byte{byte(opcode.SETITEM), byte(opcode.RET)},
[]byte{byte(opcode.RET)}, nil)
t.Run("Good", func(t *testing.T) {
arr := stackitem.NewArray([]stackitem.Item{stackitem.Make(12), stackitem.Make(2)})
expected := stackitem.NewArray([]stackitem.Item{stackitem.Make(12), stackitem.Make(42)})
runWithArgs(t, tryProg, expected, arr, arr, 1, 42)
})
t.Run("negative index", getTestFuncForVM(tryProg,
fmt.Sprintf("The value %d is out of range.", math.MinInt32),
[]stackitem.Item{}, math.MinInt32, 42))
t.Run("very big index", getTestFuncForVM(tryProg,
nil, []stackitem.Item{}, int64(math.MaxInt32)+1, 0))
}
func TestSETITEMMap(t *testing.T) {
prog := makeProgram(opcode.SETITEM, opcode.PICKITEM)
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make(3))
runWithArgs(t, prog, []byte{0, 1}, m, 5, m, 5, []byte{0, 1})
t.Run("big key", func(t *testing.T) {
m := stackitem.NewMap()
key := make([]byte, stackitem.MaxKeySize)
for i := range key {
key[i] = 0x0F
}
m.Add(stackitem.NewByteArray(key), stackitem.Make(3))
runWithArgs(t, prog, "value", m, key, m, key, "value")
})
}
func TestSETITEMBigMapBad(t *testing.T) {
prog := makeProgram(opcode.SETITEM)
m := stackitem.NewMap()
for i := range MaxStackSize {
m.Add(stackitem.Make(i), stackitem.Make(i))
}
runWithArgs(t, prog, nil, m, m, MaxStackSize, 0)
}
// This test checks is SETITEM properly updates reference counter.
// 1. Create 2 arrays of size MaxStackSize/2 - 3.
// 2. SETITEM each of them to a map.
// 3. Replace each of them with a scalar value.
func TestSETITEMMapStackLimit(t *testing.T) {
size := MaxStackSize/2 - 4
m := stackitem.NewMap()
m.Add(stackitem.NewBigInteger(big.NewInt(1)), stackitem.NewArray(makeArrayOfType(size, stackitem.BooleanT)))
m.Add(stackitem.NewBigInteger(big.NewInt(2)), stackitem.NewArray(makeArrayOfType(size, stackitem.BooleanT)))
prog := makeProgram(
opcode.DUP, opcode.PUSH1, opcode.PUSH1, opcode.SETITEM,
opcode.DUP, opcode.PUSH2, opcode.PUSH2, opcode.SETITEM,
opcode.DUP, opcode.PUSH3, opcode.PUSH3, opcode.SETITEM,
opcode.DUP, opcode.PUSH4, opcode.PUSH4, opcode.SETITEM)
v := load(prog)
v.estack.PushVal(m)
runVM(t, v)
}
func TestSETITEMBigMapGood(t *testing.T) {
prog := makeProgram(opcode.SETITEM)
vm := load(prog)
m := stackitem.NewMap()
for i := range MaxStackSize - 3 {
m.Add(stackitem.Make(i), stackitem.Make(i))
}
vm.estack.Push(Element{value: m})
vm.estack.PushVal(0)
vm.estack.PushVal(0)
runVM(t, vm)
}
func TestSIZE(t *testing.T) {
prog := makeProgram(opcode.SIZE)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("ByteArray", getTestFuncForVM(prog, 2, []byte{0, 1}))
t.Run("Buffer", getTestFuncForVM(prog, 2, stackitem.NewBuffer([]byte{0, 1})))
t.Run("Bool", getTestFuncForVM(prog, 1, false))
t.Run("Array", getTestFuncForVM(prog, 2, []stackitem.Item{stackitem.Make(1), stackitem.Make([]byte{})}))
t.Run("Map", func(t *testing.T) {
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make(6))
m.Add(stackitem.Make([]byte{0, 1}), stackitem.Make(6))
runWithArgs(t, prog, 2, m)
})
}
func TestKEYSMap(t *testing.T) {
prog := makeProgram(opcode.KEYS)
vm := load(prog)
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make(6))
m.Add(stackitem.Make([]byte{0, 1}), stackitem.Make(6))
vm.estack.Push(Element{value: m})
runVM(t, vm)
assert.Equal(t, 1, vm.estack.Len())
top := vm.estack.Pop().value.(*stackitem.Array)
assert.Equal(t, 2, len(top.Value().([]stackitem.Item)))
assert.Contains(t, top.Value().([]stackitem.Item), stackitem.Make(5))
assert.Contains(t, top.Value().([]stackitem.Item), stackitem.Make([]byte{0, 1}))
}
func TestKEYS(t *testing.T) {
prog := makeProgram(opcode.KEYS)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("WrongType", getTestFuncForVM(prog, nil, []stackitem.Item{}))
}
func TestTry_ENDFINALLY_before_ENDTRY(t *testing.T) {
prog := makeProgram(opcode.TRY, 0, 3, opcode.ENDFINALLY)
require.NoError(t, IsScriptCorrect(prog, nil))
v := load(prog)
var err error
require.NotPanics(t, func() { err = v.Run() })
require.Error(t, err)
}
func TestVALUESMap(t *testing.T) {
prog := makeProgram(opcode.VALUES)
vm := load(prog)
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make([]byte{2, 3}))
m.Add(stackitem.Make([]byte{0, 1}), stackitem.Make([]stackitem.Item{}))
vm.estack.Push(Element{value: m})
runVM(t, vm)
assert.Equal(t, 1, vm.estack.Len())
top := vm.estack.Pop().value.(*stackitem.Array)
assert.Equal(t, 2, len(top.Value().([]stackitem.Item)))
assert.Contains(t, top.Value().([]stackitem.Item), stackitem.Make([]byte{2, 3}))
assert.Contains(t, top.Value().([]stackitem.Item), stackitem.Make([]stackitem.Item{}))
}
func TestVALUES(t *testing.T) {
prog := makeProgram(opcode.VALUES)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("WrongType", getTestFuncForVM(prog, nil, 5))
t.Run("Array", getTestFuncForVM(prog, []int{4}, []int{4}))
}
func TestHASKEY(t *testing.T) {
prog := makeProgram(opcode.HASKEY)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("OneArgument", getTestFuncForVM(prog, nil, 1))
t.Run("WrongKeyType", getTestFuncForVM(prog, nil, []stackitem.Item{}, []stackitem.Item{}))
t.Run("WrongCollectionType", getTestFuncForVM(prog, nil, 1, 2))
arr := makeArrayOfType(5, stackitem.BooleanT)
t.Run("Array", func(t *testing.T) {
t.Run("True", getTestFuncForVM(prog, true, stackitem.NewArray(arr), 4))
t.Run("too big", getTestFuncForVM(prog, nil, stackitem.NewArray(arr), maxu64Plus(4)))
t.Run("False", getTestFuncForVM(prog, false, stackitem.NewArray(arr), 5))
})
t.Run("Struct", func(t *testing.T) {
t.Run("True", getTestFuncForVM(prog, true, stackitem.NewStruct(arr), 4))
t.Run("too big", getTestFuncForVM(prog, nil, stackitem.NewStruct(arr), maxu64Plus(4)))
t.Run("False", getTestFuncForVM(prog, false, stackitem.NewStruct(arr), 5))
})
t.Run("Buffer", func(t *testing.T) {
t.Run("True", getTestFuncForVM(prog, true, stackitem.NewBuffer([]byte{5, 5, 5}), 2))
t.Run("too big", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{5, 5, 5}), maxu64Plus(2)))
t.Run("False", getTestFuncForVM(prog, false, stackitem.NewBuffer([]byte{5, 5, 5}), 3))
t.Run("Negative", getTestFuncForVM(prog, nil, stackitem.NewBuffer([]byte{5, 5, 5}), -1))
})
t.Run("ByteArray", func(t *testing.T) {
t.Run("True", getTestFuncForVM(prog, true, stackitem.NewByteArray([]byte{5, 5, 5}), 2))
t.Run("too big", getTestFuncForVM(prog, nil, stackitem.NewByteArray([]byte{5, 5, 5}), maxu64Plus(2)))
t.Run("False", getTestFuncForVM(prog, false, stackitem.NewByteArray([]byte{5, 5, 5}), 3))
t.Run("Negative", getTestFuncForVM(prog, nil, stackitem.NewByteArray([]byte{5, 5, 5}), -1))
})
}
func TestHASKEYMap(t *testing.T) {
prog := makeProgram(opcode.HASKEY)
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make(6))
t.Run("True", getTestFuncForVM(prog, true, m, 5))
t.Run("False", getTestFuncForVM(prog, false, m, 6))
}
func TestHASKEYBigKey(t *testing.T) {
v := newTestVM()
buf := io.NewBufBinWriter()
emit.Int(buf.BinWriter, 1024*1024)
emit.Opcodes(buf.BinWriter, opcode.NEWBUFFER, opcode.NEWMAP)
emit.Int(buf.BinWriter, 64)
emit.Opcodes(buf.BinWriter, opcode.NEWBUFFER)
emit.Opcodes(buf.BinWriter, opcode.INITSLOT, opcode.Opcode(0), opcode.Opcode(3))
emit.Opcodes(buf.BinWriter, opcode.LDARG1, opcode.LDARG0, opcode.CONVERT, opcode.Opcode(stackitem.ByteArrayT))
emit.Opcodes(buf.BinWriter, opcode.LDARG0, opcode.SETITEM, opcode.LDARG1, opcode.LDARG2)
emit.Opcodes(buf.BinWriter, opcode.CONVERT, opcode.Opcode(stackitem.ByteArrayT))
emit.Opcodes(buf.BinWriter, opcode.HASKEY)
emit.Opcodes(buf.BinWriter, opcode.JMP, opcode.Opcode(0xFB)) // -5
v.Load(buf.Bytes())
checkVMFailed(t, v)
}
func TestSIGN(t *testing.T) {
prog := makeProgram(opcode.SIGN)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("WrongType", getTestFuncForVM(prog, nil, []stackitem.Item{}))
t.Run("Bool", getTestFuncForVM(prog, 0, false))
t.Run("PositiveInt", getTestFuncForVM(prog, 1, 2))
t.Run("NegativeInt", getTestFuncForVM(prog, -1, -1))
t.Run("Zero", getTestFuncForVM(prog, 0, 0))
t.Run("ByteArray", getTestFuncForVM(prog, 1, []byte{0, 1}))
}
func TestSimpleCall(t *testing.T) {
buf := io.NewBufBinWriter()
w := buf.BinWriter
emit.Opcodes(w, opcode.PUSH2)
emit.Instruction(w, opcode.CALL, []byte{03})
emit.Opcodes(w, opcode.RET)
emit.Opcodes(w, opcode.PUSH10)
emit.Opcodes(w, opcode.ADD)
emit.Opcodes(w, opcode.RET)
result := 12
vm := load(buf.Bytes())
runVM(t, vm)
assert.Equal(t, result, int(vm.estack.Pop().BigInt().Int64()))
}
func TestNZ(t *testing.T) {
prog := makeProgram(opcode.NZ)
t.Run("True", getTestFuncForVM(prog, true, 1))
t.Run("False", getTestFuncForVM(prog, false, 0))
}
func TestPICK(t *testing.T) {
prog := makeProgram(opcode.PICK)
t.Run("NoItem", getTestFuncForVM(prog, nil, 1))
t.Run("Negative", getTestFuncForVM(prog, nil, -1))
t.Run("very big", getTestFuncForVM(prog, nil, 1, 2, 3, maxu64Plus(1)))
}
func TestPICKgood(t *testing.T) {
prog := makeProgram(opcode.PICK)
result := 2
vm := load(prog)
vm.estack.PushVal(0)
vm.estack.PushVal(1)
vm.estack.PushVal(result)
vm.estack.PushVal(3)
vm.estack.PushVal(4)
vm.estack.PushVal(5)
vm.estack.PushVal(3)
runVM(t, vm)
assert.Equal(t, int64(result), vm.estack.Pop().BigInt().Int64())
}
func TestPICKDup(t *testing.T) {
prog := makeProgram(opcode.PUSHM1, opcode.PUSH0,
opcode.PUSH1,
opcode.PUSH2,
opcode.PICK,
opcode.ABS)
vm := load(prog)
runVM(t, vm)
assert.Equal(t, 4, vm.estack.Len())
assert.Equal(t, int64(1), vm.estack.Pop().BigInt().Int64())
assert.Equal(t, int64(1), vm.estack.Pop().BigInt().Int64())
assert.Equal(t, int64(0), vm.estack.Pop().BigInt().Int64())
assert.Equal(t, int64(-1), vm.estack.Pop().BigInt().Int64())
}
func TestROTBad(t *testing.T) {
prog := makeProgram(opcode.ROT)
runWithArgs(t, prog, nil, 1, 2)
}
func TestROTGood(t *testing.T) {
prog := makeProgram(opcode.ROT)
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushVal(2)
vm.estack.PushVal(3)
runVM(t, vm)
assert.Equal(t, 3, vm.estack.Len())
assert.Equal(t, stackitem.Make(1), vm.estack.Pop().value)
assert.Equal(t, stackitem.Make(3), vm.estack.Pop().value)
assert.Equal(t, stackitem.Make(2), vm.estack.Pop().value)
}
func TestROLLBad1(t *testing.T) {
prog := makeProgram(opcode.ROLL)
runWithArgs(t, prog, nil, 1, -1)
}
func TestROLLBad2(t *testing.T) {
prog := makeProgram(opcode.ROLL)
runWithArgs(t, prog, nil, 1, 2, 3, 3)
}
func maxu64Plus(x int64) *big.Int {
bi := new(big.Int).SetUint64(math.MaxUint64)
bi.Add(bi, big.NewInt(2))
return bi
}
func TestROLLBad3(t *testing.T) {
prog := makeProgram(opcode.ROLL)
runWithArgs(t, prog, nil, 1, 2, 3, maxu64Plus(2))
}
func TestROLLGood(t *testing.T) {
prog := makeProgram(opcode.ROLL)
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushVal(2)
vm.estack.PushVal(3)
vm.estack.PushVal(4)
vm.estack.PushVal(1)
runVM(t, vm)
assert.Equal(t, 4, vm.estack.Len())
assert.Equal(t, stackitem.Make(3), vm.estack.Pop().value)
assert.Equal(t, stackitem.Make(4), vm.estack.Pop().value)
assert.Equal(t, stackitem.Make(2), vm.estack.Pop().value)
assert.Equal(t, stackitem.Make(1), vm.estack.Pop().value)
}
func getCheckEStackFunc(items ...any) func(t *testing.T, v *VM) {
return func(t *testing.T, v *VM) {
require.Equal(t, len(items), v.estack.Len())
for i := range items {
assert.Equal(t, stackitem.Make(items[i]), v.estack.Peek(i).Item())
}
}
}
func TestREVERSE3(t *testing.T) {
prog := makeProgram(opcode.REVERSE3)
t.Run("SmallStack", getTestFuncForVM(prog, nil, 1, 2))
t.Run("Good", getCustomTestFuncForVM(prog, getCheckEStackFunc(1, 2, 3), 1, 2, 3))
}
func TestREVERSE4(t *testing.T) {
prog := makeProgram(opcode.REVERSE4)
t.Run("SmallStack", getTestFuncForVM(prog, nil, 1, 2, 3))
t.Run("Good", getCustomTestFuncForVM(prog, getCheckEStackFunc(1, 2, 3, 4), 1, 2, 3, 4))
}
func TestREVERSEN(t *testing.T) {
prog := makeProgram(opcode.REVERSEN)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("SmallStack", getTestFuncForVM(prog, nil, 1, 2, 3))
t.Run("NegativeArgument", getTestFuncForVM(prog, nil, 1, 2, -1))
t.Run("Zero", getCustomTestFuncForVM(prog, getCheckEStackFunc(3, 2, 1), 1, 2, 3, 0))
t.Run("OneItem", getCustomTestFuncForVM(prog, getCheckEStackFunc(42), 42, 1))
t.Run("Good", getCustomTestFuncForVM(prog, getCheckEStackFunc(1, 2, 3, 4, 5), 1, 2, 3, 4, 5, 5))
t.Run("VeryBigNumber", getCustomTestFuncForVM(prog, nil, 1, 2, maxu64Plus(2)))
}
func TestTUCKbadNoitems(t *testing.T) {
prog := makeProgram(opcode.TUCK)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("NoItem", getTestFuncForVM(prog, nil, 1))
}
func TestTUCKgood(t *testing.T) {
prog := makeProgram(opcode.TUCK)
vm := load(prog)
vm.estack.PushVal(42)
vm.estack.PushVal(34)
runVM(t, vm)
assert.Equal(t, int64(34), vm.estack.Peek(0).BigInt().Int64())
assert.Equal(t, int64(42), vm.estack.Peek(1).BigInt().Int64())
assert.Equal(t, int64(34), vm.estack.Peek(2).BigInt().Int64())
}
func TestTUCKgood2(t *testing.T) {
prog := makeProgram(opcode.TUCK)
vm := load(prog)
vm.estack.PushVal(11)
vm.estack.PushVal(42)
vm.estack.PushVal(34)
runVM(t, vm)
assert.Equal(t, int64(34), vm.estack.Peek(0).BigInt().Int64())
assert.Equal(t, int64(42), vm.estack.Peek(1).BigInt().Int64())
assert.Equal(t, int64(34), vm.estack.Peek(2).BigInt().Int64())
assert.Equal(t, int64(11), vm.estack.Peek(3).BigInt().Int64())
}
func TestOVER(t *testing.T) {
prog := makeProgram(opcode.OVER)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("NoItem", getTestFuncForVM(prog, nil, 1))
}
func TestOVERgood(t *testing.T) {
prog := makeProgram(opcode.OVER)
vm := load(prog)
vm.estack.PushVal(42)
vm.estack.PushVal(34)
runVM(t, vm)
assert.Equal(t, int64(42), vm.estack.Peek(0).BigInt().Int64())
assert.Equal(t, int64(34), vm.estack.Peek(1).BigInt().Int64())
assert.Equal(t, int64(42), vm.estack.Peek(2).BigInt().Int64())
assert.Equal(t, 3, vm.estack.Len())
}
func TestOVERDup(t *testing.T) {
prog := makeProgram(opcode.PUSHDATA1, 2, 1, 0,
opcode.PUSH1,
opcode.OVER,
opcode.PUSH1,
opcode.LEFT,
opcode.PUSHDATA1, 1, 2,
opcode.CAT)
vm := load(prog)
runVM(t, vm)
assert.Equal(t, 3, vm.estack.Len())
assert.Equal(t, []byte{0x01, 0x02}, vm.estack.Pop().Bytes())
assert.Equal(t, int64(1), vm.estack.Pop().BigInt().Int64())
assert.Equal(t, []byte{0x01, 0x00}, vm.estack.Pop().Bytes())
}
func TestNIPBadNoItem(t *testing.T) {
prog := makeProgram(opcode.NIP)
runWithArgs(t, prog, nil, 1)
}
func TestNIPGood(t *testing.T) {
prog := makeProgram(opcode.NIP)
runWithArgs(t, prog, 2, 1, 2)
}
func TestDROPBadNoItem(t *testing.T) {
prog := makeProgram(opcode.DROP)
runWithArgs(t, prog, nil)
}
func TestDROPGood(t *testing.T) {
prog := makeProgram(opcode.DROP)
vm := load(prog)
vm.estack.PushVal(1)
runVM(t, vm)
assert.Equal(t, 0, vm.estack.Len())
}
func TestXDROP(t *testing.T) {
prog := makeProgram(opcode.XDROP)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("NoN", getTestFuncForVM(prog, nil, 1, 2))
t.Run("very big argument", getTestFuncForVM(prog, nil, 1, 2, maxu64Plus(1)))
t.Run("Negative", getTestFuncForVM(prog, nil, 1, -1))
}
func TestXDROPgood(t *testing.T) {
prog := makeProgram(opcode.XDROP)
vm := load(prog)
vm.estack.PushVal(0)
vm.estack.PushVal(1)
vm.estack.PushVal(2)
vm.estack.PushVal(2)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, int64(2), vm.estack.Peek(0).BigInt().Int64())
assert.Equal(t, int64(1), vm.estack.Peek(1).BigInt().Int64())
}
func TestCLEAR(t *testing.T) {
prog := makeProgram(opcode.CLEAR)
v := load(prog)
v.estack.PushVal(123)
require.Equal(t, 1, v.estack.Len())
require.NoError(t, v.Run())
require.Equal(t, 0, v.estack.Len())
}
func TestINVERTbadNoitem(t *testing.T) {
prog := makeProgram(opcode.INVERT)
runWithArgs(t, prog, nil)
}
func TestINVERTgood1(t *testing.T) {
prog := makeProgram(opcode.INVERT)
runWithArgs(t, prog, -1, 0)
}
func TestINVERTgood2(t *testing.T) {
prog := makeProgram(opcode.INVERT)
vm := load(prog)
vm.estack.PushVal(-1)
runVM(t, vm)
assert.Equal(t, int64(0), vm.estack.Peek(0).BigInt().Int64())
}
func TestINVERTgood3(t *testing.T) {
prog := makeProgram(opcode.INVERT)
vm := load(prog)
vm.estack.PushVal(0x69)
runVM(t, vm)
assert.Equal(t, int64(-0x6A), vm.estack.Peek(0).BigInt().Int64())
}
func TestINVERTWithConversion1(t *testing.T) {
prog := makeProgram(opcode.PUSHDATA2, 0, 0, opcode.INVERT)
vm := load(prog)
runVM(t, vm)
assert.Equal(t, int64(-1), vm.estack.Peek(0).BigInt().Int64())
}
func TestINVERTWithConversion2(t *testing.T) {
prog := makeProgram(opcode.PUSH0, opcode.PUSH1, opcode.NUMEQUAL, opcode.INVERT)
vm := load(prog)
runVM(t, vm)
assert.Equal(t, int64(-1), vm.estack.Peek(0).BigInt().Int64())
}
func TestCAT(t *testing.T) {
prog := makeProgram(opcode.CAT)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("OneArgument", getTestFuncForVM(prog, nil, []byte("abc")))
t.Run("BigItem", func(t *testing.T) {
arg := make([]byte, stackitem.MaxSize/2+1)
runWithArgs(t, prog, nil, arg, arg)
})
t.Run("Good", getTestFuncForVM(prog, stackitem.NewBuffer([]byte("abcdef")), []byte("abc"), []byte("def")))
t.Run("Int0ByteArray", getTestFuncForVM(prog, stackitem.NewBuffer([]byte{}), 0, []byte{}))
t.Run("ByteArrayInt1", getTestFuncForVM(prog, stackitem.NewBuffer([]byte{1}), []byte{}, 1))
}
func TestSUBSTR(t *testing.T) {
prog := makeProgram(opcode.SUBSTR)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("OneArgument", getTestFuncForVM(prog, nil, 1))
t.Run("TwoArguments", getTestFuncForVM(prog, nil, 0, 2))
t.Run("Good", getTestFuncForVM(prog, stackitem.NewBuffer([]byte("bc")), []byte("abcdef"), 1, 2))
t.Run("BadOffset", getTestFuncForVM(prog, nil, []byte("abcdef"), 7, 1))
t.Run("very big offset", getTestFuncForVM(prog, nil, []byte("abcdef"), maxu64Plus(1), 1))
t.Run("BigLen", getTestFuncForVM(prog, nil, []byte("abcdef"), 1, 6))
t.Run("very big len", getTestFuncForVM(prog, nil, []byte("abcdef"), 1, maxu64Plus(1)))
t.Run("NegativeOffset", getTestFuncForVM(prog, nil, []byte("abcdef"), -1, 3))
t.Run("NegativeLen", getTestFuncForVM(prog, nil, []byte("abcdef"), 3, -1))
}
func TestSUBSTRBad387(t *testing.T) {
prog := makeProgram(opcode.SUBSTR)
vm := load(prog)
b := make([]byte, 6, 20)
copy(b, "abcdef")
vm.estack.PushVal(b)
vm.estack.PushVal(1)
vm.estack.PushVal(6)
checkVMFailed(t, vm)
}
func TestLEFT(t *testing.T) {
prog := makeProgram(opcode.LEFT)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("NoString", getTestFuncForVM(prog, nil, 2))
t.Run("NegativeLen", getTestFuncForVM(prog, nil, "abcdef", -1))
t.Run("Good", getTestFuncForVM(prog, stackitem.NewBuffer([]byte("ab")), "abcdef", 2))
t.Run("BadBigLen", getTestFuncForVM(prog, nil, "abcdef", 8))
t.Run("bad, very big len", getTestFuncForVM(prog, nil, "abcdef", maxu64Plus(2)))
}
func TestRIGHT(t *testing.T) {
prog := makeProgram(opcode.RIGHT)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("NoString", getTestFuncForVM(prog, nil, 2))
t.Run("NegativeLen", getTestFuncForVM(prog, nil, "abcdef", -1))
t.Run("Good", getTestFuncForVM(prog, stackitem.NewBuffer([]byte("ef")), "abcdef", 2))
t.Run("BadLen", getTestFuncForVM(prog, nil, "abcdef", 8))
t.Run("bad, very big len", getTestFuncForVM(prog, nil, "abcdef", maxu64Plus(2)))
}
func TestPACK(t *testing.T) {
for _, op := range []opcode.Opcode{opcode.PACK, opcode.PACKSTRUCT} {
t.Run(op.String(), func(t *testing.T) {
prog := makeProgram(op)
t.Run("BadLen", getTestFuncForVM(prog, nil, 1))
t.Run("BigLen", getTestFuncForVM(prog, nil, 100500))
t.Run("Good0Len", getTestFuncForVM(prog, []stackitem.Item{}, 0))
})
}
}
func TestPACKGood(t *testing.T) {
for _, op := range []opcode.Opcode{opcode.PACK, opcode.PACKSTRUCT} {
t.Run(op.String(), func(t *testing.T) {
prog := makeProgram(op)
elements := []int{55, 34, 42}
vm := load(prog)
// canary
vm.estack.PushVal(1)
for i := len(elements) - 1; i >= 0; i-- {
vm.estack.PushVal(elements[i])
}
vm.estack.PushVal(len(elements))
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
a := vm.estack.Peek(0).Array()
assert.Equal(t, len(elements), len(a))
for i := range elements {
e := a[i].Value().(*big.Int)
assert.Equal(t, int64(elements[i]), e.Int64())
}
assert.Equal(t, int64(1), vm.estack.Peek(1).BigInt().Int64())
})
}
}
func TestPACK_UNPACK_MaxSize(t *testing.T) {
prog := makeProgram(opcode.PACK, opcode.UNPACK)
elements := make([]int, MaxStackSize-2)
vm := load(prog)
// canary
vm.estack.PushVal(1)
for i := len(elements) - 1; i >= 0; i-- {
vm.estack.PushVal(elements[i])
}
vm.estack.PushVal(len(elements))
runVM(t, vm)
// check reference counter = 1+1+1024
assert.Equal(t, 1+1+len(elements), int(vm.refs))
assert.Equal(t, 1+1+len(elements), vm.estack.Len()) // canary + length + elements
assert.Equal(t, int64(len(elements)), vm.estack.Peek(0).Value().(*big.Int).Int64())
for i := range elements {
e, ok := vm.estack.Peek(i + 1).Value().(*big.Int)
assert.True(t, ok)
assert.Equal(t, int64(elements[i]), e.Int64())
}
assert.Equal(t, int64(1), vm.estack.Peek(1+len(elements)).BigInt().Int64())
}
func TestPACK_UNPACK_PACK_MaxSize(t *testing.T) {
prog := makeProgram(opcode.PACK, opcode.UNPACK, opcode.PACK)
elements := make([]int, MaxStackSize-2)
vm := load(prog)
// canary
vm.estack.PushVal(1)
for i := len(elements) - 1; i >= 0; i-- {
vm.estack.PushVal(elements[i])
}
vm.estack.PushVal(len(elements))
runVM(t, vm)
// check reference counter = 1+1+1024
assert.Equal(t, 1+1+len(elements), int(vm.refs))
assert.Equal(t, 2, vm.estack.Len())
a := vm.estack.Peek(0).Array()
assert.Equal(t, len(elements), len(a))
for i := range elements {
e := a[i].Value().(*big.Int)
assert.Equal(t, int64(elements[i]), e.Int64())
}
assert.Equal(t, int64(1), vm.estack.Peek(1).BigInt().Int64())
}
func TestPACKMAP_UNPACK_PACKMAP_MaxSize(t *testing.T) {
prog := makeProgram(opcode.PACKMAP, opcode.UNPACK, opcode.PACKMAP)
elements := make([]int, (MaxStackSize-2)/2)
vm := load(prog)
// canary
vm.estack.PushVal(-1)
for i := len(elements) - 1; i >= 0; i-- {
elements[i] = i
vm.estack.PushVal(i * 2)
vm.estack.PushVal(i)
}
vm.estack.PushVal(len(elements))
runVM(t, vm)
// check reference counter = 1+1+1024*2
assert.Equal(t, 1+1+len(elements)*2, int(vm.refs))
assert.Equal(t, 2, vm.estack.Len())
m := vm.estack.Peek(0).value.(*stackitem.Map).Value().([]stackitem.MapElement)
assert.Equal(t, len(elements), len(m))
for i := range elements {
k := m[i].Key.Value().(*big.Int)
v := m[i].Value.Value().(*big.Int)
assert.Equal(t, int64(elements[i]), k.Int64())
assert.Equal(t, int64(elements[i])*2, v.Int64())
}
assert.Equal(t, int64(-1), vm.estack.Peek(1).BigInt().Int64())
}
func TestPACKMAPBadKey(t *testing.T) {
prog := makeProgram(opcode.PACKMAP)
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushItem(stackitem.NewBuffer([]byte{1}))
vm.estack.PushVal(1)
checkVMFailed(t, vm)
}
func TestUNPACKBadNotArray(t *testing.T) {
prog := makeProgram(opcode.UNPACK)
runWithArgs(t, prog, nil, 1)
}
func TestUNPACKGood(t *testing.T) {
prog := makeProgram(opcode.UNPACK)
elements := []int{55, 34, 42}
vm := load(prog)
// canary
vm.estack.PushVal(1)
vm.estack.PushVal(elements)
runVM(t, vm)
assert.Equal(t, 5, vm.estack.Len())
assert.Equal(t, int64(len(elements)), vm.estack.Peek(0).BigInt().Int64())
for k, v := range elements {
assert.Equal(t, int64(v), vm.estack.Peek(k+1).BigInt().Int64())
}
assert.Equal(t, int64(1), vm.estack.Peek(len(elements)+1).BigInt().Int64())
}
func TestREVERSEITEMS(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.REVERSEITEMS)
t.Run("InvalidItem", getTestFuncForVM(prog, nil, 1))
t.Run("Buffer", getTestFuncForVM(prog, stackitem.NewBuffer([]byte{3, 2, 1}), stackitem.NewBuffer([]byte{1, 2, 3})))
}
func testREVERSEITEMSIssue437(t *testing.T, i1 opcode.Opcode, t2 stackitem.Type, reversed bool) {
prog := makeProgram(
opcode.PUSH0, i1,
opcode.DUP, opcode.PUSH1, opcode.APPEND,
opcode.DUP, opcode.PUSH2, opcode.APPEND,
opcode.DUP, opcode.CONVERT, opcode.Opcode(t2), opcode.REVERSEITEMS)
arr := make([]stackitem.Item, 2)
if reversed {
arr[0] = stackitem.Make(2)
arr[1] = stackitem.Make(1)
} else {
arr[0] = stackitem.Make(1)
arr[1] = stackitem.Make(2)
}
if i1 == opcode.NEWARRAY {
runWithArgs(t, prog, stackitem.NewArray(arr))
} else {
runWithArgs(t, prog, stackitem.NewStruct(arr))
}
}
func TestREVERSEITEMSIssue437(t *testing.T) {
t.Run("Array+Array", func(t *testing.T) { testREVERSEITEMSIssue437(t, opcode.NEWARRAY, stackitem.ArrayT, true) })
t.Run("Struct+Struct", func(t *testing.T) { testREVERSEITEMSIssue437(t, opcode.NEWSTRUCT, stackitem.StructT, true) })
t.Run("Array+Struct", func(t *testing.T) { testREVERSEITEMSIssue437(t, opcode.NEWARRAY, stackitem.StructT, false) })
t.Run("Struct+Array", func(t *testing.T) { testREVERSEITEMSIssue437(t, opcode.NEWSTRUCT, stackitem.ArrayT, false) })
}
func TestREVERSEITEMSGoodOneElem(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.REVERSEITEMS)
elements := []int{22}
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushVal(elements)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
a := vm.estack.Peek(0).Array()
assert.Equal(t, len(elements), len(a))
e := a[0].Value().(*big.Int)
assert.Equal(t, int64(elements[0]), e.Int64())
}
func TestREVERSEITEMSGoodStruct(t *testing.T) {
eodd := []int{22, 34, 42, 55, 81}
even := []int{22, 34, 42, 55, 81, 99}
eall := [][]int{eodd, even}
for _, elements := range eall {
prog := makeProgram(opcode.DUP, opcode.REVERSEITEMS)
vm := load(prog)
vm.estack.PushVal(1)
arr := make([]stackitem.Item, len(elements))
for i := range elements {
arr[i] = stackitem.Make(elements[i])
}
vm.estack.Push(Element{value: stackitem.NewStruct(arr)})
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
a := vm.estack.Peek(0).Array()
assert.Equal(t, len(elements), len(a))
for k, v := range elements {
e := a[len(a)-1-k].Value().(*big.Int)
assert.Equal(t, int64(v), e.Int64())
}
assert.Equal(t, int64(1), vm.estack.Peek(1).BigInt().Int64())
}
}
func TestREVERSEITEMSGood(t *testing.T) {
eodd := []int{22, 34, 42, 55, 81}
even := []int{22, 34, 42, 55, 81, 99}
eall := [][]int{eodd, even}
for _, elements := range eall {
prog := makeProgram(opcode.DUP, opcode.REVERSEITEMS)
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushVal(elements)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
a := vm.estack.Peek(0).Array()
assert.Equal(t, len(elements), len(a))
for k, v := range elements {
e := a[len(a)-1-k].Value().(*big.Int)
assert.Equal(t, int64(v), e.Int64())
}
assert.Equal(t, int64(1), vm.estack.Peek(1).BigInt().Int64())
}
}
func TestREMOVE(t *testing.T) {
prog := makeProgram(opcode.REMOVE)
t.Run("NoArgument", getTestFuncForVM(prog, nil))
t.Run("OneArgument", getTestFuncForVM(prog, nil, 1))
t.Run("NotArray", getTestFuncForVM(prog, nil, 1, 1))
t.Run("BadIndex", getTestFuncForVM(prog, nil, []int{22, 34, 42, 55, 81}, 10))
t.Run("very big index", getTestFuncForVM(prog, nil, []int{22, 34, 42, 55, 81}, maxu64Plus(1)))
}
func TestREMOVEGood(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.PUSH2, opcode.REMOVE)
elements := []int{22, 34, 42, 55, 81}
reselements := []int{22, 34, 55, 81}
vm := load(prog)
vm.estack.PushVal(1)
vm.estack.PushVal(elements)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, stackitem.Make(reselements), vm.estack.Pop().value)
assert.Equal(t, stackitem.Make(1), vm.estack.Pop().value)
}
func TestREMOVEMap(t *testing.T) {
prog := makeProgram(opcode.REMOVE, opcode.PUSH5, opcode.HASKEY)
vm := load(prog)
m := stackitem.NewMap()
m.Add(stackitem.Make(5), stackitem.Make(3))
m.Add(stackitem.Make([]byte{0, 1}), stackitem.Make([]byte{2, 3}))
vm.estack.Push(Element{value: m})
vm.estack.Push(Element{value: m})
vm.estack.PushVal(stackitem.Make(5))
runVM(t, vm)
assert.Equal(t, 1, vm.estack.Len())
assert.Equal(t, stackitem.Make(false), vm.estack.Pop().value)
}
func testCLEARITEMS(t *testing.T, item stackitem.Item) {
prog := makeProgram(opcode.DUP, opcode.DUP, opcode.CLEARITEMS, opcode.SIZE)
v := load(prog)
v.estack.PushVal(item)
runVM(t, v)
require.Equal(t, 2, v.estack.Len())
require.EqualValues(t, 2, int(v.refs)) // empty collection + it's size
require.EqualValues(t, 0, v.estack.Pop().BigInt().Int64())
}
func TestCLEARITEMS(t *testing.T) {
arr := []stackitem.Item{stackitem.NewBigInteger(big.NewInt(1)), stackitem.NewByteArray([]byte{1})}
m := stackitem.NewMap()
m.Add(stackitem.NewBigInteger(big.NewInt(1)), stackitem.NewByteArray([]byte{}))
m.Add(stackitem.NewByteArray([]byte{42}), stackitem.NewBigInteger(big.NewInt(2)))
testCases := map[string]stackitem.Item{
"empty Array": stackitem.NewArray([]stackitem.Item{}),
"filled Array": stackitem.NewArray(arr),
"empty Struct": stackitem.NewStruct([]stackitem.Item{}),
"filled Struct": stackitem.NewStruct(arr),
"empty Map": stackitem.NewMap(),
"filled Map": m,
}
for name, item := range testCases {
t.Run(name, func(t *testing.T) { testCLEARITEMS(t, item) })
}
t.Run("Integer", func(t *testing.T) {
prog := makeProgram(opcode.CLEARITEMS)
runWithArgs(t, prog, nil, 1)
})
}
func TestPOPITEM(t *testing.T) {
testPOPITEM := func(t *testing.T, item, elem, arr any) {
prog := makeProgram(opcode.DUP, opcode.POPITEM)
v := load(prog)
v.estack.PushVal(item)
runVM(t, v)
require.EqualValues(t, stackitem.Make(elem), v.estack.Pop().Item())
require.EqualValues(t, stackitem.Make(arr), v.estack.Pop().Item())
}
elems := []stackitem.Item{stackitem.Make(11), stackitem.Make(31)}
t.Run("Array", func(t *testing.T) {
testPOPITEM(t, stackitem.NewArray(elems), 31, elems[:1])
})
t.Run("Struct", func(t *testing.T) {
testPOPITEM(t, stackitem.NewStruct(elems), 31, elems[:1])
})
t.Run("0-length array", func(t *testing.T) {
prog := makeProgram(opcode.NEWARRAY0, opcode.POPITEM)
v := load(prog)
checkVMFailed(t, v)
})
t.Run("primitive type", func(t *testing.T) {
prog := makeProgram(opcode.PUSH4, opcode.POPITEM)
v := load(prog)
checkVMFailed(t, v)
})
}
func TestSWAPGood(t *testing.T) {
prog := makeProgram(opcode.SWAP)
vm := load(prog)
vm.estack.PushVal(2)
vm.estack.PushVal(4)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, int64(2), vm.estack.Pop().BigInt().Int64())
assert.Equal(t, int64(4), vm.estack.Pop().BigInt().Int64())
}
func TestSWAP(t *testing.T) {
prog := makeProgram(opcode.SWAP)
t.Run("EmptyStack", getTestFuncForVM(prog, nil))
t.Run("SmallStack", getTestFuncForVM(prog, nil, 4))
}
func TestDupInt(t *testing.T) {
prog := makeProgram(opcode.DUP, opcode.ABS)
vm := load(prog)
vm.estack.PushVal(-1)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, int64(1), vm.estack.Pop().BigInt().Int64())
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,
opcode.PUSH1,
opcode.LEFT,
opcode.PUSHDATA1, 1, 2,
opcode.CAT)
vm := load(prog)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, []byte{0x01, 0x02}, vm.estack.Pop().Bytes())
assert.Equal(t, []byte{0x01, 0x00}, vm.estack.Pop().Bytes())
}
func TestDupBool(t *testing.T) {
prog := makeProgram(opcode.PUSH0, opcode.NOT,
opcode.DUP,
opcode.PUSH1, opcode.NOT,
opcode.BOOLAND)
vm := load(prog)
runVM(t, vm)
assert.Equal(t, 2, vm.estack.Len())
assert.Equal(t, false, vm.estack.Pop().Bool())
assert.Equal(t, true, vm.estack.Pop().Bool())
}
var opcodesTestCases = map[opcode.Opcode][]struct {
name string
args []any
expected any
actual func(vm *VM) any
}{
opcode.AND: {
{
name: "1_1",
args: []any{1, 1},
expected: int64(1),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "1_0",
args: []any{1, 0},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0_1",
args: []any{0, 1},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0_0",
args: []any{0, 0},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "random_values",
args: []any{
[]byte{1, 0, 1, 0, 1, 0, 1, 1},
[]byte{1, 1, 0, 0, 0, 0, 0, 1},
},
expected: []byte{1, 0, 0, 0, 0, 0, 0, 1},
actual: func(vm *VM) any {
return vm.estack.Pop().Bytes()
},
},
},
opcode.OR: {
{
name: "1_1",
args: []any{1, 1},
expected: int64(1),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0_0",
args: []any{0, 0},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0_1",
args: []any{0, 1},
expected: int64(1),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "1_0",
args: []any{1, 0},
expected: int64(1),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "random_values",
args: []any{
[]byte{1, 0, 1, 0, 1, 0, 1, 1},
[]byte{1, 1, 0, 0, 0, 0, 0, 1},
},
expected: []byte{1, 1, 1, 0, 1, 0, 1, 1},
actual: func(vm *VM) any {
return vm.estack.Pop().Bytes()
},
},
},
opcode.XOR: {
{
name: "1_1",
args: []any{1, 1},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0_0",
args: []any{0, 0},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0_1",
args: []any{0, 1},
expected: int64(1),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "1_0",
args: []any{1, 0},
expected: int64(1),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "random_values",
args: []any{
[]byte{1, 0, 1, 0, 1, 0, 1, 1},
[]byte{1, 1, 0, 0, 0, 0, 0, 1},
},
expected: []byte{0, 1, 1, 0, 1, 0, 1},
actual: func(vm *VM) any {
return vm.estack.Pop().Bytes()
},
},
},
opcode.BOOLOR: {
{
name: "1_1",
args: []any{true, true},
expected: true,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
{
name: "0_0",
args: []any{false, false},
expected: false,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
{
name: "0_1",
args: []any{false, true},
expected: true,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
{
name: "1_0",
args: []any{true, false},
expected: true,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
},
opcode.MIN: {
{
name: "3_5",
args: []any{3, 5},
expected: int64(3),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "5_3",
args: []any{5, 3},
expected: int64(3),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "3_3",
args: []any{3, 3},
expected: int64(3),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
},
opcode.MAX: {
{
name: "3_5",
args: []any{3, 5},
expected: int64(5),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "5_3",
args: []any{5, 3},
expected: int64(5),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "3_3",
args: []any{3, 3},
expected: int64(3),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
},
opcode.WITHIN: {
{
name: "within",
args: []any{4, 3, 5},
expected: true,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
{
name: "less",
args: []any{2, 3, 5},
expected: false,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
{
name: "more",
args: []any{6, 3, 5},
expected: false,
actual: func(vm *VM) any {
return vm.estack.Pop().Bool()
},
},
},
opcode.NEGATE: {
{
name: "3",
args: []any{3},
expected: int64(-3),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "-3",
args: []any{-3},
expected: int64(3),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
{
name: "0",
args: []any{0},
expected: int64(0),
actual: func(vm *VM) any {
return vm.estack.Pop().BigInt().Int64()
},
},
},
}
func TestBitAndNumericOpcodes(t *testing.T) {
for code, opcodeTestCases := range opcodesTestCases {
t.Run(code.String(), func(t *testing.T) {
for _, testCase := range opcodeTestCases {
prog := makeProgram(code)
vm := load(prog)
t.Run(testCase.name, func(t *testing.T) {
for _, arg := range testCase.args {
vm.estack.PushVal(arg)
}
runVM(t, vm)
assert.Equal(t, testCase.expected, testCase.actual(vm))
})
}
})
}
}
func TestSLOTOpcodes(t *testing.T) {
t.Run("Fail", func(t *testing.T) {
t.Run("EmptyStatic", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 0), nil))
t.Run("EmptyLocal", getTestFuncForVM(makeProgram(opcode.INITSLOT, 0, 0), nil))
t.Run("NotEnoughArguments", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 0, 2), nil, 1))
t.Run("DoubleStatic", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 1, opcode.INITSSLOT, 1), nil))
t.Run("DoubleLocal", getTestFuncForVM(makeProgram(opcode.INITSLOT, 1, 0, opcode.INITSLOT, 1, 0), nil))
t.Run("DoubleArgument", getTestFuncForVM(makeProgram(opcode.INITSLOT, 0, 1, opcode.INITSLOT, 0, 1), nil, 1, 2))
t.Run("LoadBigStatic", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 2, opcode.LDSFLD2), nil))
t.Run("LoadBigLocal", getTestFuncForVM(makeProgram(opcode.INITSLOT, 2, 2, opcode.LDLOC2), nil, 1, 2))
t.Run("LoadBigArgument", getTestFuncForVM(makeProgram(opcode.INITSLOT, 2, 2, opcode.LDARG2), nil, 1, 2))
t.Run("StoreBigStatic", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 2, opcode.STSFLD2), nil, 0))
t.Run("StoreBigLocal", getTestFuncForVM(makeProgram(opcode.INITSLOT, 2, 2, opcode.STLOC2), nil, 0, 1, 2))
t.Run("StoreBigArgument", getTestFuncForVM(makeProgram(opcode.INITSLOT, 2, 2, opcode.STARG2), nil, 0, 1, 2))
})
t.Run("Default", func(t *testing.T) {
t.Run("DefaultStatic", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 2, opcode.LDSFLD1), stackitem.Null{}))
t.Run("DefaultLocal", getTestFuncForVM(makeProgram(opcode.INITSLOT, 2, 0, opcode.LDLOC1), stackitem.Null{}))
t.Run("DefaultArgument", getTestFuncForVM(makeProgram(opcode.INITSLOT, 0, 2, opcode.LDARG1), 2, 2, 1))
})
t.Run("Set/Get", func(t *testing.T) {
t.Run("FailCrossLoads", func(t *testing.T) {
t.Run("Static/Local", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 2, opcode.LDLOC1), nil))
t.Run("Static/Argument", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 2, opcode.LDARG1), nil))
t.Run("Local/Argument", getTestFuncForVM(makeProgram(opcode.INITSLOT, 0, 2, opcode.LDLOC1), nil))
t.Run("Argument/Local", getTestFuncForVM(makeProgram(opcode.INITSLOT, 2, 0, opcode.LDARG1), nil))
})
t.Run("Static", getTestFuncForVM(makeProgram(opcode.INITSSLOT, 8, opcode.STSFLD, 7, opcode.LDSFLD, 7), 42, 42))
t.Run("Local", getTestFuncForVM(makeProgram(opcode.INITSLOT, 8, 0, opcode.STLOC, 7, opcode.LDLOC, 7), 42, 42))
t.Run("Argument", getTestFuncForVM(makeProgram(opcode.INITSLOT, 0, 2, opcode.STARG, 1, opcode.LDARG, 1), 42, 42, 1, 2))
})
t.Run("InitStaticSlotInMethod", func(t *testing.T) {
prog := makeProgram(
opcode.CALL, 4, opcode.LDSFLD0, opcode.RET,
opcode.INITSSLOT, 1, opcode.PUSH12, opcode.STSFLD0, opcode.RET,
)
runWithArgs(t, prog, 12)
})
}
func TestNestedStructClone(t *testing.T) {
progs := []string{
// VALUES for deeply nested structs, see neo-project/neo#2534.
"5601c501fe0360589d604a12c0db415824f7cd45",
// APPEND of deeply nested struct to empty array.
"5601c2c501fe0360589d604a12c0db415824f7cf45",
// VALUES for map with deeply nested struct.
"5601c84a11c501fe0060589d604a12c0db415824f7d0cd45",
// VALUES for a lot of not-so-deep nested structs.
"5601c5000a60589d604a12c0db415824f701fe03504a519d4a102afa01ff03c0cd45",
}
for _, h := range progs {
prog, err := hex.DecodeString(h)
require.NoError(t, err)
vm := load(prog)
checkVMFailed(t, vm)
}
}
func TestNestedStructEquals(t *testing.T) {
h := "560112c501fe0160589d604a12c0db415824f7509d4a102aec4597" // See neo-project/neo-vm#426.
prog, err := hex.DecodeString(h)
require.NoError(t, err)
vm := load(prog)
checkVMFailed(t, vm)
}
func TestRemoveReferrer(t *testing.T) {
h := "560110c34a10c36058cf4540" // #2501
prog, err := hex.DecodeString(h)
require.NoError(t, err)
vm := load(prog)
require.NoError(t, vm.StepInto()) // INITSSLOT
assert.Equal(t, 1, int(vm.refs))
require.NoError(t, vm.StepInto()) // PUSH0
assert.Equal(t, 2, int(vm.refs))
require.NoError(t, vm.StepInto()) // NEWARRAY
assert.Equal(t, 2, int(vm.refs))
require.NoError(t, vm.StepInto()) // DUP
assert.Equal(t, 3, int(vm.refs))
require.NoError(t, vm.StepInto()) // PUSH0
assert.Equal(t, 4, int(vm.refs))
require.NoError(t, vm.StepInto()) // NEWARRAY
assert.Equal(t, 4, int(vm.refs))
require.NoError(t, vm.StepInto()) // STSFLD0
assert.Equal(t, 3, int(vm.refs))
require.NoError(t, vm.StepInto()) // LDSFLD0
assert.Equal(t, 4, int(vm.refs))
require.NoError(t, vm.StepInto()) // APPEND
assert.Equal(t, 3, int(vm.refs))
require.NoError(t, vm.StepInto()) // DROP
assert.Equal(t, 1, int(vm.refs))
require.NoError(t, vm.StepInto()) // RET
assert.Equal(t, 0, int(vm.refs))
}
func TestUninitializedSyscallHandler(t *testing.T) {
v := newTestVM()
v.Reset(trigger.Application) // Reset SyscallHandler.
id := make([]byte, 4)
binary.LittleEndian.PutUint32(id, interopnames.ToID([]byte(interopnames.SystemRuntimeGasLeft)))
script := append([]byte{byte(opcode.SYSCALL)}, id...)
v.LoadScript(script)
err := v.Run()
require.Error(t, err)
require.True(t, strings.Contains(err.Error(), "SyscallHandler is not initialized"), err.Error())
assert.Equal(t, true, v.HasFailed())
}
func TestCannotSetOnExecHookOfStartedVm(t *testing.T) {
prog := makeProgram(opcode.NOP)
v := load(prog)
runVM(t, v)
require.Panics(t, func() {
v.SetOnExecHook(func(scriptHash util.Uint160, offset int, opcode opcode.Opcode) {})
})
}
func TestOnExecHookGivesValidTrace(t *testing.T) {
prog := makeProgram(opcode.NOP, opcode.NOP, opcode.NOP)
expectedOffsets := []int{0, 1, 2, 3}
expectedOpcodes := []opcode.Opcode{opcode.NOP, opcode.NOP, opcode.NOP, opcode.RET}
actualScriptHashes, actualOffsets, actualOpcodes := runWithTrace(t, prog)
require.Equal(t, expectedOffsets, actualOffsets, "Invalid offsets")
require.Equal(t, expectedOpcodes, actualOpcodes, "Invalid opcodes")
t.Run("Validate collected script hashes", func(t *testing.T) {
scriptHash := actualScriptHashes[0]
expectedScriptHashes := []util.Uint160{scriptHash, scriptHash, scriptHash, scriptHash}
require.Equal(t, expectedScriptHashes, actualScriptHashes)
})
}
func runWithTrace(t *testing.T, prog []byte) ([]util.Uint160, []int, []opcode.Opcode) {
v := load(prog)
scriptHashes := make([]util.Uint160, 0)
offsets := make([]int, 0)
opcodes := make([]opcode.Opcode, 0)
onExec := func(scriptHash util.Uint160, offset int, opcode opcode.Opcode) {
scriptHashes = append(scriptHashes, scriptHash)
offsets = append(offsets, offset)
opcodes = append(opcodes, opcode)
}
v.SetOnExecHook(onExec)
runVM(t, v)
return scriptHashes, offsets, opcodes
}
func makeProgram(opcodes ...opcode.Opcode) []byte {
prog := make([]byte, len(opcodes)+1) // RET
for i := range opcodes {
prog[i] = byte(opcodes[i])
}
prog[len(prog)-1] = byte(opcode.RET)
return prog
}
func load(prog []byte) *VM {
vm := newTestVM()
if len(prog) != 0 {
vm.LoadScript(prog)
}
return vm
}
func randomBytes(n int) []byte {
const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
b := make([]byte, n)
for i := range b {
b[i] = charset[rand.IntN(len(charset))]
}
return b
}
func newTestVM() *VM {
v := New()
v.GasLimit = -1
return v
}
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