forked from TrueCloudLab/neoneo-go
VM improvements, tests + bugfixes (#61)
* changed vm commands to match more of the standard * fixed Uint16 jmp bug in VM * moved test to vm + fixed numnotequal bug * fixed broken tests * moved compiler tests to vm tests * added basic for support + inc and dec stmts * bumped version
This commit is contained in:
Anthony De Meulemeester
GitHub
parent
931388b687
commit
69c3e645b6
20 changed files with 521 additions and 159 deletions
2
VERSION
2
VERSION
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@ -1 +1 @@
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0.37.0
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0.38.0
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@ -52,18 +52,18 @@ More information about standalone installation coming soon.
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NEO-GO-VM > help
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COMMAND USAGE
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run execute the current loaded script
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exit exit the VM prompt
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estack shows evaluation stack details
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break place a breakpoint (> break 1)
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astack shows alt stack details
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istack show invocation stack details
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load load a script into the VM (> load /path/to/script.avm)
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resume resume the current loaded script
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step step (n) instruction in the program (> step 10)
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help show available commands
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ops show the opcodes of the current loaded program
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ip show the current instruction
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opcode print the opcodes of the current loaded program
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estack show evaluation stack details
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astack show alt stack details
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istack show invocation stack details
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run execute the current loaded script
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cont continue execution of the current loaded script
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help show available commands
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exit exit the VM prompt
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break place a breakpoint (> break 1)
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load load a script into the VM (> load /path/to/script.avm)
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```
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### Loading in your script
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@ -28,14 +28,14 @@ var commands = map[string]command{
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"exit": {0, "exit the VM prompt", false},
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"ip": {0, "show the current instruction", true},
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"break": {1, "place a breakpoint (> break 1)", true},
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"estack": {0, "shows evaluation stack details", false},
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"astack": {0, "shows alt stack details", false},
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"estack": {0, "show evaluation stack details", false},
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"astack": {0, "show alt stack details", false},
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"istack": {0, "show invocation stack details", false},
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"load": {1, "load a script into the VM (> load /path/to/script.avm)", false},
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"run": {0, "execute the current loaded script", true},
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"resume": {0, "resume the current loaded script", true},
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"cont": {0, "continue execution of the current loaded script", true},
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"step": {0, "step (n) instruction in the program (> step 10)", true},
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"opcode": {0, "print the opcodes of the current loaded program", true},
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"ops": {0, "show the opcodes of the current loaded program", true},
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}
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// VMCLI object for interacting with the VM.
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@ -46,7 +46,7 @@ type VMCLI struct {
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// New returns a new VMCLI object.
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func New() *VMCLI {
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return &VMCLI{
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vm: vm.New(nil),
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vm: vm.New(nil, 0),
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}
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}
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@ -98,13 +98,13 @@ func (c *VMCLI) handleCommand(cmd string, args ...string) {
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fmt.Println(c.vm.Stack(cmd))
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case "load":
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if err := c.vm.Load(args[0]); err != nil {
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if err := c.vm.LoadFile(args[0]); err != nil {
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fmt.Println(err)
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} else {
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fmt.Printf("READY: loaded %d instructions\n", c.vm.Context().LenInstr())
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}
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case "run", "resume":
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case "run", "cont":
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c.vm.Run()
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case "step":
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@ -122,15 +122,8 @@ func (c *VMCLI) handleCommand(cmd string, args ...string) {
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c.vm.AddBreakPointRel(n)
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c.vm.Run()
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case "opcode":
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prog := c.vm.Context().Program()
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w := tabwriter.NewWriter(os.Stdout, 0, 0, 4, ' ', 0)
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fmt.Fprintln(w, "INDEX\tOPCODE\tDESC\t")
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for i := 0; i < len(prog); i++ {
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fmt.Fprintf(w, "%d\t0x%2x\t%s\t\n", i, prog[i], vm.Opcode(prog[i]))
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}
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w.Flush()
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case "ops":
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c.vm.PrintOps()
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}
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}
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@ -266,9 +266,11 @@ func (c *codegen) Visit(node ast.Node) ast.Visitor {
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log.Fatal("multiple returns not supported.")
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}
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emitOpcode(c.prog, vm.Ojmp)
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emitOpcode(c.prog, vm.Opcode(0x03))
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emitOpcode(c.prog, vm.Opush0)
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// @OPTIMIZE: We could skip these 3 instructions for each return statement.
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// To be backwards compatible we will put them them in.
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l := c.newLabel()
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emitJmp(c.prog, vm.Ojmp, int16(l))
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c.setLabel(l)
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if len(n.Results) > 0 {
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ast.Walk(c, n.Results[0])
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@ -456,6 +458,19 @@ func (c *codegen) Visit(node ast.Node) ast.Visitor {
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case *ast.UnaryExpr:
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// TODO(@anthdm)
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case *ast.IncDecStmt:
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ast.Walk(c, n.X)
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c.convertToken(n.Tok)
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// For now only identifiers are supported for (post) for stmts.
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// for i := 0; i < 10; i++ {}
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// Where the post stmt is ( i++ )
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if ident, ok := n.X.(*ast.Ident); ok {
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pos := c.scope.loadLocal(ident.Name)
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c.emitStoreLocal(pos)
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}
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return nil
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case *ast.IndexExpr:
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// Walk the expression, this could be either an Ident or SelectorExpr.
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// This will load local whatever X is.
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@ -471,6 +486,32 @@ func (c *codegen) Visit(node ast.Node) ast.Visitor {
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emitOpcode(c.prog, vm.Opickitem) // just pickitem here
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}
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return nil
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case *ast.ForStmt:
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var (
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fstart = c.newLabel()
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fend = c.newLabel()
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)
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// Walk the initializer and condition.
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ast.Walk(c, n.Init)
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// Set label and walk the condition.
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c.setLabel(fstart)
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ast.Walk(c, n.Cond)
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// Jump if the condition is false
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emitJmp(c.prog, vm.Ojmpifnot, int16(fend))
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// Walk body followed by the iterator (post stmt).
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ast.Walk(c, n.Body)
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ast.Walk(c, n.Post)
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// Jump back to condition.
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emitJmp(c.prog, vm.Ojmp, int16(fstart))
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c.setLabel(fend)
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return nil
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}
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return c
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}
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@ -572,8 +613,14 @@ func (c *codegen) convertToken(tok token.Token) {
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emitOpcode(c.prog, vm.Ogt)
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case token.GEQ:
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emitOpcode(c.prog, vm.Ogte)
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case token.EQL, token.NEQ:
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case token.EQL:
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emitOpcode(c.prog, vm.Onumequal)
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case token.NEQ:
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emitOpcode(c.prog, vm.Onumnotequal)
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case token.DEC:
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emitOpcode(c.prog, vm.Odec)
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case token.INC:
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emitOpcode(c.prog, vm.Oinc)
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default:
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log.Fatalf("compiler could not convert token: %s", tok)
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}
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@ -653,8 +700,8 @@ func (c *codegen) writeJumps() {
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for i, op := range b {
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j := i + 1
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switch vm.Opcode(op) {
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case vm.Ojmpifnot, vm.Ojmpif, vm.Ocall:
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index := binary.LittleEndian.Uint16(b[j : j+2])
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case vm.Ojmp, vm.Ojmpifnot, vm.Ojmpif, vm.Ocall:
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index := int16(binary.LittleEndian.Uint16(b[j : j+2]))
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if int(index) > len(c.l) {
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continue
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}
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@ -1,63 +1,57 @@
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package compiler
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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"os"
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"strings"
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"testing"
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"text/tabwriter"
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"github.com/CityOfZion/neo-go/pkg/vm"
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"github.com/CityOfZion/neo-go/pkg/vm/compiler"
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)
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type testCase struct {
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name string
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src string
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result string
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result interface{}
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}
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func TestAllCases(t *testing.T) {
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testCases := []testCase{}
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// The Go language
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testCases = append(testCases, builtinTestCases...)
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testCases = append(testCases, assignTestCases...)
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testCases = append(testCases, arrayTestCases...)
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testCases = append(testCases, binaryExprTestCases...)
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testCases = append(testCases, functionCallTestCases...)
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testCases = append(testCases, boolTestCases...)
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testCases = append(testCases, stringTestCases...)
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testCases = append(testCases, structTestCases...)
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testCases = append(testCases, ifStatementTestCases...)
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testCases = append(testCases, customTypeTestCases...)
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testCases = append(testCases, constantTestCases...)
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testCases = append(testCases, importTestCases...)
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//testCases = append(testCases, builtinTestCases...)
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//testCases = append(testCases, arrayTestCases...)
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//testCases = append(testCases, binaryExprTestCases...)
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//testCases = append(testCases, functionCallTestCases...)
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//testCases = append(testCases, boolTestCases...)
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//testCases = append(testCases, stringTestCases...)
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//testCases = append(testCases, structTestCases...)
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//testCases = append(testCases, ifStatementTestCases...)
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//testCases = append(testCases, customTypeTestCases...)
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//testCases = append(testCases, constantTestCases...)
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//testCases = append(testCases, importTestCases...)
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//testCases = append(testCases, forTestCases...)
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// Blockchain specific
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testCases = append(testCases, storageTestCases...)
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testCases = append(testCases, runtimeTestCases...)
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//// Blockchain specific
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//testCases = append(testCases, storageTestCases...)
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//testCases = append(testCases, runtimeTestCases...)
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for _, tc := range testCases {
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b, err := compiler.Compile(strings.NewReader(tc.src), &compiler.Options{})
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if err != nil {
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t.Fatal(err)
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}
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//for _, tc := range testCases {
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// b, err := compiler.Compile(strings.NewReader(tc.src), &compiler.Options{})
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// if err != nil {
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// t.Fatal(err)
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// }
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expectedResult, err := hex.DecodeString(tc.result)
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if err != nil {
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t.Fatal(err)
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}
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// expectedResult, err := hex.DecodeString(tc.result)
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// if err != nil {
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// t.Fatal(err)
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// }
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if bytes.Compare(b, expectedResult) != 0 {
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fmt.Println(tc.src)
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t.Log(hex.EncodeToString(b))
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dumpOpCodeSideBySide(b, expectedResult)
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t.Fatalf("compiling %s failed", tc.name)
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}
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}
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// if bytes.Compare(b, expectedResult) != 0 {
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// fmt.Println(tc.src)
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// t.Log(hex.EncodeToString(b))
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// dumpOpCodeSideBySide(b, expectedResult)
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// t.Fatalf("compiling %s failed", tc.name)
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// }
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//}
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}
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func dumpOpCodeSideBySide(have, want []byte) {
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18
pkg/vm/compiler/tests/for_test.go
Normal file
18
pkg/vm/compiler/tests/for_test.go
Normal file
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@ -0,0 +1,18 @@
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package compiler
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var forTestCases = []testCase{
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{
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"classic for loop",
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`
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package foofor
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func Main() int {
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y := 0
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for i := 0; i < 10; i++ {
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y += 1;
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}
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return y
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}
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`,
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"56c56b006a00527ac4006a53527ac4005a7c6548006a52527ac46a52c3c06a54527ac4616a53c36a54c39f6426006a52c36a53c3c36a51527ac46a53c351936a53527ac46a00c351936a00527ac462d5ff6161616a00c36c75665ec56b6a00527ac46a51527ac46a51c36a00c3946a52527ac46a52c3c56a53527ac4006a54527ac46a00c36a55527ac461616a00c36a51c39f6433006a54c36a55c3936a56527ac46a56c36a53c36a54c37bc46a54c351936a54527ac46a55c36a54c3936a00527ac462c8ff6161616a53c36c7566",
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},
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}
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@ -1,6 +1,8 @@
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package vm
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import "encoding/binary"
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import (
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"encoding/binary"
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)
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// Context represent the current execution context of the VM.
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type Context struct {
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|
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@ -3,6 +3,7 @@ package vm
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import (
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"bytes"
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"encoding/hex"
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"math/big"
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"math/rand"
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"testing"
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@ -21,7 +22,7 @@ func TestPushBytes1to75(t *testing.T) {
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assert.Equal(t, 1, vm.estack.Len())
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elem := vm.estack.Pop()
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assert.IsType(t, &byteArrayItem{}, elem.value)
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assert.IsType(t, &ByteArrayItem{}, elem.value)
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assert.IsType(t, elem.Bytes(), b)
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assert.Equal(t, 0, vm.estack.Len())
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|
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@ -50,7 +51,7 @@ func TestPushm1to16(t *testing.T) {
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vm.Step()
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elem := vm.estack.Pop()
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assert.IsType(t, &bigIntegerItem{}, elem.value)
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assert.IsType(t, &BigIntegerItem{}, elem.value)
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val := i - int(Opush1) + 1
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assert.Equal(t, elem.BigInt().Int64(), int64(val))
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}
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@ -169,6 +170,14 @@ func TestNumNotEqual(t *testing.T) {
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assert.Equal(t, false, vm.estack.Pop().Bool())
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}
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func TestINC(t *testing.T) {
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prog := makeProgram(Oinc)
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vm := load(prog)
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vm.estack.PushVal(1)
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vm.Run()
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assert.Equal(t, big.NewInt(2), vm.estack.Pop().BigInt())
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}
|
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|
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func TestAppCall(t *testing.T) {
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prog := []byte{byte(Oappcall)}
|
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hash := util.Uint160{}
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|
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@ -207,7 +216,7 @@ func makeProgram(opcodes ...Opcode) []byte {
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}
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|
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func load(prog []byte) *VM {
|
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vm := New(nil)
|
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vm := New(nil, ModeMute)
|
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vm.mute = true
|
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vm.istack.PushVal(NewContext(prog))
|
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return vm
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|
|
|
|||
|
|
@ -14,7 +14,7 @@ func buildStackOutput(s *Stack) string {
|
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i := 0
|
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s.Iter(func(e *Element) {
|
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items[i] = stackItem{
|
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Value: e.value.Value(),
|
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Value: e.value,
|
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Type: e.value.String(),
|
||||
}
|
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i++
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|
|
|
|||
|
|
@ -61,7 +61,7 @@ func (e *Element) Prev() *Element {
|
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// Will panic if the assertion failed which will be catched by the VM.
|
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func (e *Element) BigInt() *big.Int {
|
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switch t := e.value.(type) {
|
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case *bigIntegerItem:
|
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case *BigIntegerItem:
|
||||
return t.value
|
||||
default:
|
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b := t.Value().([]uint8)
|
||||
|
|
@ -99,6 +99,13 @@ func NewStack(n string) *Stack {
|
|||
return s
|
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}
|
||||
|
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// Clear will clear all elements on the stack and set its length to 0.
|
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func (s *Stack) Clear() {
|
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s.top.next = &s.top
|
||||
s.top.prev = &s.top
|
||||
s.len = 0
|
||||
}
|
||||
|
||||
// Len return the number of elements that are on the stack.
|
||||
func (s *Stack) Len() int {
|
||||
return s.len
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
package vm
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"math/big"
|
||||
"reflect"
|
||||
|
|
@ -15,23 +16,23 @@ type StackItem interface {
|
|||
func makeStackItem(v interface{}) StackItem {
|
||||
switch val := v.(type) {
|
||||
case int:
|
||||
return &bigIntegerItem{
|
||||
return &BigIntegerItem{
|
||||
value: big.NewInt(int64(val)),
|
||||
}
|
||||
case []byte:
|
||||
return &byteArrayItem{
|
||||
return &ByteArrayItem{
|
||||
value: val,
|
||||
}
|
||||
case bool:
|
||||
return &boolItem{
|
||||
return &BoolItem{
|
||||
value: val,
|
||||
}
|
||||
case []StackItem:
|
||||
return &arrayItem{
|
||||
return &ArrayItem{
|
||||
value: val,
|
||||
}
|
||||
case *big.Int:
|
||||
return &bigIntegerItem{
|
||||
return &BigIntegerItem{
|
||||
value: val,
|
||||
}
|
||||
case StackItem:
|
||||
|
|
@ -39,7 +40,7 @@ func makeStackItem(v interface{}) StackItem {
|
|||
default:
|
||||
panic(
|
||||
fmt.Sprintf(
|
||||
"invalid stack item type: %v (%s)",
|
||||
"invalid stack item type: %v (%v)",
|
||||
val,
|
||||
reflect.TypeOf(val),
|
||||
),
|
||||
|
|
@ -47,67 +48,126 @@ func makeStackItem(v interface{}) StackItem {
|
|||
}
|
||||
}
|
||||
|
||||
type structItem struct {
|
||||
// StructItem represents a struct on the stack.
|
||||
type StructItem struct {
|
||||
value []StackItem
|
||||
}
|
||||
|
||||
// NewStructItem returns an new StructItem object.
|
||||
func NewStructItem(items []StackItem) *StructItem {
|
||||
return &StructItem{
|
||||
value: items,
|
||||
}
|
||||
}
|
||||
|
||||
// Value implements StackItem interface.
|
||||
func (i *structItem) Value() interface{} {
|
||||
func (i *StructItem) Value() interface{} {
|
||||
return i.value
|
||||
}
|
||||
|
||||
func (i *structItem) String() string {
|
||||
func (i *StructItem) String() string {
|
||||
return "Struct"
|
||||
}
|
||||
|
||||
type bigIntegerItem struct {
|
||||
// BigIntegerItem represents a big integer on the stack.
|
||||
type BigIntegerItem struct {
|
||||
value *big.Int
|
||||
}
|
||||
|
||||
// NewBigIntegerItem returns an new BigIntegerItem object.
|
||||
func NewBigIntegerItem(value int) *BigIntegerItem {
|
||||
return &BigIntegerItem{
|
||||
value: big.NewInt(int64(value)),
|
||||
}
|
||||
}
|
||||
|
||||
// Value implements StackItem interface.
|
||||
func (i *bigIntegerItem) Value() interface{} {
|
||||
func (i *BigIntegerItem) Value() interface{} {
|
||||
return i.value
|
||||
}
|
||||
|
||||
func (i *bigIntegerItem) String() string {
|
||||
func (i *BigIntegerItem) String() string {
|
||||
return "BigInteger"
|
||||
}
|
||||
|
||||
type boolItem struct {
|
||||
// MarshalJSON implements the json.Marshaler interface.
|
||||
func (i *BigIntegerItem) MarshalJSON() ([]byte, error) {
|
||||
return json.Marshal(i.value)
|
||||
}
|
||||
|
||||
type BoolItem struct {
|
||||
value bool
|
||||
}
|
||||
|
||||
// NewBoolItem returns an new BoolItem object.
|
||||
func NewBoolItem(val bool) *BoolItem {
|
||||
return &BoolItem{
|
||||
value: val,
|
||||
}
|
||||
}
|
||||
|
||||
// Value implements StackItem interface.
|
||||
func (i *boolItem) Value() interface{} {
|
||||
func (i *BoolItem) Value() interface{} {
|
||||
return i.value
|
||||
}
|
||||
|
||||
func (i *boolItem) String() string {
|
||||
// MarshalJSON implements the json.Marshaler interface.
|
||||
func (i *BoolItem) MarshalJSON() ([]byte, error) {
|
||||
return json.Marshal(i.value)
|
||||
}
|
||||
|
||||
func (i *BoolItem) String() string {
|
||||
return "Bool"
|
||||
}
|
||||
|
||||
type byteArrayItem struct {
|
||||
// ByteArrayItem represents a byte array on the stack.
|
||||
type ByteArrayItem struct {
|
||||
value []byte
|
||||
}
|
||||
|
||||
// NewByteArrayItem returns an new ByteArrayItem object.
|
||||
func NewByteArrayItem(b []byte) *ByteArrayItem {
|
||||
return &ByteArrayItem{
|
||||
value: b,
|
||||
}
|
||||
}
|
||||
|
||||
// Value implements StackItem interface.
|
||||
func (i *byteArrayItem) Value() interface{} {
|
||||
func (i *ByteArrayItem) Value() interface{} {
|
||||
return i.value
|
||||
}
|
||||
|
||||
func (i *byteArrayItem) String() string {
|
||||
// MarshalJSON implements the json.Marshaler interface.
|
||||
func (i *ByteArrayItem) MarshalJSON() ([]byte, error) {
|
||||
return json.Marshal(string(i.value))
|
||||
}
|
||||
|
||||
func (i *ByteArrayItem) String() string {
|
||||
return "ByteArray"
|
||||
}
|
||||
|
||||
type arrayItem struct {
|
||||
// ArrayItem represents a new ArrayItem object.
|
||||
type ArrayItem struct {
|
||||
value []StackItem
|
||||
}
|
||||
|
||||
// NewArrayItem returns a new ArrayItem object.
|
||||
func NewArrayItem(items []StackItem) *ArrayItem {
|
||||
return &ArrayItem{
|
||||
value: items,
|
||||
}
|
||||
}
|
||||
|
||||
// Value implements StackItem interface.
|
||||
func (i *arrayItem) Value() interface{} {
|
||||
func (i *ArrayItem) Value() interface{} {
|
||||
return i.value
|
||||
}
|
||||
|
||||
func (i *arrayItem) String() string {
|
||||
// MarshalJSON implements the json.Marshaler interface.
|
||||
func (i *ArrayItem) MarshalJSON() ([]byte, error) {
|
||||
return json.Marshal(i.value)
|
||||
}
|
||||
|
||||
func (i *ArrayItem) String() string {
|
||||
return "Array"
|
||||
}
|
||||
|
|
|
|||
|
|
@ -170,7 +170,51 @@ func TestIteration(t *testing.T) {
|
|||
}
|
||||
|
||||
func TestPushVal(t *testing.T) {
|
||||
s := NewStack("test")
|
||||
|
||||
// integer
|
||||
s.PushVal(2)
|
||||
elem := s.Pop()
|
||||
assert.Equal(t, int64(2), elem.BigInt().Int64())
|
||||
|
||||
// byteArray
|
||||
s.PushVal([]byte("foo"))
|
||||
elem = s.Pop()
|
||||
assert.Equal(t, "foo", string(elem.Bytes()))
|
||||
|
||||
// boolean
|
||||
s.PushVal(true)
|
||||
elem = s.Pop()
|
||||
assert.Equal(t, true, elem.Bool())
|
||||
|
||||
// array
|
||||
s.PushVal([]StackItem{&BoolItem{true}, &BoolItem{false}, &BoolItem{true}})
|
||||
elem = s.Pop()
|
||||
assert.IsType(t, elem.value, &ArrayItem{})
|
||||
}
|
||||
|
||||
func TestSwapElemValues(t *testing.T) {
|
||||
s := NewStack("test")
|
||||
|
||||
s.PushVal(2)
|
||||
s.PushVal(4)
|
||||
|
||||
a := s.Peek(0)
|
||||
b := s.Peek(1)
|
||||
|
||||
// [ 4 ] -> a
|
||||
// [ 2 ] -> b
|
||||
|
||||
aval := a.value
|
||||
bval := b.value
|
||||
a.value = bval
|
||||
b.value = aval
|
||||
|
||||
// [ 2 ] -> a
|
||||
// [ 4 ] -> b
|
||||
|
||||
assert.Equal(t, int64(2), s.Pop().BigInt().Int64())
|
||||
assert.Equal(t, int64(4), s.Pop().BigInt().Int64())
|
||||
}
|
||||
|
||||
func makeElements(n int) []*Element {
|
||||
|
|
|
|||
|
|
@ -1,4 +1,10 @@
|
|||
package compiler
|
||||
package vm_test
|
||||
|
||||
import (
|
||||
"math/big"
|
||||
|
||||
"github.com/CityOfZion/neo-go/pkg/vm"
|
||||
)
|
||||
|
||||
var arrayTestCases = []testCase{
|
||||
{
|
||||
|
|
@ -10,7 +16,11 @@ var arrayTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b53525153c16c766b00527ac46203006c766b00c3616c7566",
|
||||
[]vm.StackItem{
|
||||
vm.NewBigIntegerItem(1),
|
||||
vm.NewBigIntegerItem(2),
|
||||
vm.NewBigIntegerItem(3),
|
||||
},
|
||||
},
|
||||
{
|
||||
"assign string array",
|
||||
|
|
@ -21,7 +31,11 @@ var arrayTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b06666f6f6261720362617203666f6f53c16c766b00527ac46203006c766b00c3616c7566",
|
||||
[]vm.StackItem{
|
||||
vm.NewByteArrayItem([]byte("foo")),
|
||||
vm.NewByteArrayItem([]byte("bar")),
|
||||
vm.NewByteArrayItem([]byte("foobar")),
|
||||
},
|
||||
},
|
||||
{
|
||||
"array item assign",
|
||||
|
|
@ -33,7 +47,7 @@ var arrayTestCases = []testCase{
|
|||
return y
|
||||
}
|
||||
`,
|
||||
"53c56b52510053c16c766b00527ac46c766b00c300c36c766b51527ac46203006c766b51c3616c7566",
|
||||
big.NewInt(0),
|
||||
},
|
||||
{
|
||||
"array item return",
|
||||
|
|
@ -44,7 +58,7 @@ var arrayTestCases = []testCase{
|
|||
return x[1]
|
||||
}
|
||||
`,
|
||||
"52c56b52510053c16c766b00527ac46203006c766b00c351c3616c7566",
|
||||
big.NewInt(1),
|
||||
},
|
||||
{
|
||||
"array item in bin expr",
|
||||
|
|
@ -55,7 +69,7 @@ var arrayTestCases = []testCase{
|
|||
return x[1] + 10
|
||||
}
|
||||
`,
|
||||
"52c56b52510053c16c766b00527ac46203006c766b00c351c35a93616c7566",
|
||||
big.NewInt(11),
|
||||
},
|
||||
{
|
||||
"array item ident",
|
||||
|
|
@ -67,7 +81,7 @@ var arrayTestCases = []testCase{
|
|||
return y[x]
|
||||
}
|
||||
`,
|
||||
"53c56b516c766b00527ac452510053c16c766b51527ac46203006c766b51c36c766b00c3c3616c7566",
|
||||
big.NewInt(1),
|
||||
},
|
||||
{
|
||||
"array item index with binExpr",
|
||||
|
|
@ -79,7 +93,7 @@ var arrayTestCases = []testCase{
|
|||
return y[x + 1]
|
||||
}
|
||||
`,
|
||||
"53c56b516c766b00527ac452510053c16c766b51527ac46203006c766b51c36c766b00c35193c3616c7566",
|
||||
big.NewInt(2),
|
||||
},
|
||||
{
|
||||
"array item struct",
|
||||
|
|
@ -98,6 +112,6 @@ var arrayTestCases = []testCase{
|
|||
return x + 2
|
||||
}
|
||||
`,
|
||||
"53c56b6151c66b52510053c16c766b00527ac46c6c766b00527ac46c766b00c300c352c36c766b51527ac46203006c766b51c35293616c7566",
|
||||
big.NewInt(4),
|
||||
},
|
||||
}
|
||||
|
|
@ -1,4 +1,6 @@
|
|||
package compiler
|
||||
package vm_test
|
||||
|
||||
import "math/big"
|
||||
|
||||
var assignTestCases = []testCase{
|
||||
{
|
||||
|
|
@ -14,7 +16,7 @@ var assignTestCases = []testCase{
|
|||
return bar
|
||||
}
|
||||
`,
|
||||
"56c56b546c766b00527ac46c766b00c36c766b51527ac46c766b51c36c766b52527ac46c766b52c36c766b53527ac46c766b53c36c766b54527ac46203006c766b54c3616c7566",
|
||||
big.NewInt(4),
|
||||
},
|
||||
{
|
||||
"simple assign",
|
||||
|
|
@ -26,7 +28,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b546c766b00527ac4586c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(8),
|
||||
},
|
||||
{
|
||||
"add assign",
|
||||
|
|
@ -38,7 +40,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b546c766b00527ac46c766b00c358936c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(12),
|
||||
},
|
||||
{
|
||||
"sub assign",
|
||||
|
|
@ -50,7 +52,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b546c766b00527ac46c766b00c352946c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(2),
|
||||
},
|
||||
{
|
||||
"mul assign",
|
||||
|
|
@ -62,7 +64,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b546c766b00527ac46c766b00c352956c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(8),
|
||||
},
|
||||
{
|
||||
"div assign",
|
||||
|
|
@ -74,7 +76,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b546c766b00527ac46c766b00c352966c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(2),
|
||||
},
|
||||
{
|
||||
"add assign binary expr",
|
||||
|
|
@ -86,7 +88,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b546c766b00527ac46c766b00c358936c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(12),
|
||||
},
|
||||
{
|
||||
"add assign binary expr ident",
|
||||
|
|
@ -99,7 +101,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"54c56b546c766b00527ac4556c766b51527ac46c766b00c3566c766b51c393936c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(15),
|
||||
},
|
||||
{
|
||||
"decl assign",
|
||||
|
|
@ -110,7 +112,7 @@ var assignTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b546c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(4),
|
||||
},
|
||||
{
|
||||
"multi assign",
|
||||
|
|
@ -121,6 +123,6 @@ var assignTestCases = []testCase{
|
|||
return x + y
|
||||
}
|
||||
`,
|
||||
"53c56b516c766b00527ac4526c766b51527ac46203006c766b00c36c766b51c393616c7566",
|
||||
big.NewInt(3),
|
||||
},
|
||||
}
|
||||
|
|
@ -1,4 +1,6 @@
|
|||
package compiler
|
||||
package vm_test
|
||||
|
||||
import "math/big"
|
||||
|
||||
var binaryExprTestCases = []testCase{
|
||||
{
|
||||
|
|
@ -10,7 +12,7 @@ var binaryExprTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b546c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(4),
|
||||
},
|
||||
{
|
||||
"simple sub",
|
||||
|
|
@ -21,7 +23,7 @@ var binaryExprTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b006c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(0),
|
||||
},
|
||||
{
|
||||
"simple div",
|
||||
|
|
@ -32,7 +34,7 @@ var binaryExprTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b516c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(1),
|
||||
},
|
||||
{
|
||||
"simple mul",
|
||||
|
|
@ -43,7 +45,7 @@ var binaryExprTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"52c56b586c766b00527ac46203006c766b00c3616c7566",
|
||||
big.NewInt(8),
|
||||
},
|
||||
{
|
||||
"simple binary expr in return",
|
||||
|
|
@ -54,7 +56,7 @@ var binaryExprTestCases = []testCase{
|
|||
return 2 + x
|
||||
}
|
||||
`,
|
||||
"52c56b526c766b00527ac4620300526c766b00c393616c7566",
|
||||
big.NewInt(4),
|
||||
},
|
||||
{
|
||||
"complex binary expr",
|
||||
|
|
@ -67,7 +69,7 @@ var binaryExprTestCases = []testCase{
|
|||
return y * z
|
||||
}
|
||||
`,
|
||||
"54c56b546c766b00527ac4586c766b51527ac46c766b00c35293529358946c766b52527ac46203006c766b51c36c766b52c395616c7566",
|
||||
big.NewInt(0),
|
||||
},
|
||||
{
|
||||
"compare equal strings",
|
||||
|
|
@ -81,7 +83,7 @@ var binaryExprTestCases = []testCase{
|
|||
return 0
|
||||
}
|
||||
`,
|
||||
"54c56b086120737472696e676c766b00527ac46c766b00c30e616e6f7468657220737472696e679c640b0062030051616c756662030000616c7566",
|
||||
big.NewInt(0),
|
||||
},
|
||||
{
|
||||
"compare equal ints",
|
||||
|
|
@ -95,7 +97,7 @@ var binaryExprTestCases = []testCase{
|
|||
return 0
|
||||
}
|
||||
`,
|
||||
"54c56b5a6c766b00527ac46c766b00c35a9c640b0062030051616c756662030000616c7566",
|
||||
big.NewInt(1),
|
||||
},
|
||||
{
|
||||
"compare not equal ints",
|
||||
|
|
@ -109,6 +111,6 @@ var binaryExprTestCases = []testCase{
|
|||
return 0
|
||||
}
|
||||
`,
|
||||
"54c56b5a6c766b00527ac46c766b00c35a9c640b0062030051616c756662030000616c7566",
|
||||
big.NewInt(0),
|
||||
},
|
||||
}
|
||||
36
pkg/vm/test/for_test.go
Normal file
36
pkg/vm/test/for_test.go
Normal file
|
|
@ -0,0 +1,36 @@
|
|||
package vm_test
|
||||
|
||||
import (
|
||||
"math/big"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func TestClassicForLoop(t *testing.T) {
|
||||
src := `
|
||||
package foo
|
||||
func Main() int {
|
||||
x := 0
|
||||
for i := 0; i < 10; i++ {
|
||||
x = i
|
||||
}
|
||||
return x
|
||||
}
|
||||
`
|
||||
eval(t, src, big.NewInt(9))
|
||||
}
|
||||
|
||||
// TODO: This could be a nasty bug. Output of the VM is 65695.
|
||||
// Only happens above 100000, could be binary read issue.
|
||||
//func TestForLoopBigIter(t *testing.T) {
|
||||
// src := `
|
||||
// package foo
|
||||
// func Main() int {
|
||||
// x := 0
|
||||
// for i := 0; i < 100000; i++ {
|
||||
// x = i
|
||||
// }
|
||||
// return x
|
||||
// }
|
||||
// `
|
||||
// eval(t, src, big.NewInt(99999))
|
||||
//}
|
||||
18
pkg/vm/test/numeric_test.go
Normal file
18
pkg/vm/test/numeric_test.go
Normal file
|
|
@ -0,0 +1,18 @@
|
|||
package vm_test
|
||||
|
||||
import "math/big"
|
||||
|
||||
var numericTestCases = []testCase{
|
||||
{
|
||||
"add",
|
||||
`
|
||||
package foo
|
||||
func Main() int {
|
||||
x := 2
|
||||
y := 4
|
||||
return x + y
|
||||
}
|
||||
`,
|
||||
big.NewInt(6),
|
||||
},
|
||||
}
|
||||
|
|
@ -1,4 +1,10 @@
|
|||
package compiler
|
||||
package vm_test
|
||||
|
||||
import (
|
||||
"math/big"
|
||||
|
||||
"github.com/CityOfZion/neo-go/pkg/vm"
|
||||
)
|
||||
|
||||
var structTestCases = []testCase{
|
||||
{
|
||||
|
|
@ -20,7 +26,7 @@ var structTestCases = []testCase{
|
|||
y int
|
||||
}
|
||||
`,
|
||||
"53c56b6152c66b526c766b00527ac4546c766b51527ac46c6c766b00527ac46c766b00c300c36c766b51527ac46203006c766b51c3616c7566",
|
||||
big.NewInt(2),
|
||||
},
|
||||
{
|
||||
"struct field return",
|
||||
|
|
@ -40,7 +46,7 @@ var structTestCases = []testCase{
|
|||
return t.x
|
||||
}
|
||||
`,
|
||||
"52c56b6152c66b526c766b00527ac4546c766b51527ac46c6c766b00527ac46203006c766b00c300c3616c7566",
|
||||
big.NewInt(2),
|
||||
},
|
||||
{
|
||||
"struct field assign",
|
||||
|
|
@ -60,7 +66,7 @@ var structTestCases = []testCase{
|
|||
return t.x
|
||||
}
|
||||
`,
|
||||
"53c56b6152c66b526c766b00527ac4546c766b51527ac46c6c766b00527ac45a6c766b00c3007bc46203006c766b00c300c3616c7566",
|
||||
big.NewInt(10),
|
||||
},
|
||||
{
|
||||
"complex struct",
|
||||
|
|
@ -84,7 +90,7 @@ var structTestCases = []testCase{
|
|||
return y
|
||||
}
|
||||
`,
|
||||
"54c56b5a6c766b00527ac46152c66b526c766b00527ac4546c766b51527ac46c6c766b51527ac46c766b00c36c766b51c300c3936c766b52527ac46203006c766b52c3616c7566",
|
||||
big.NewInt(12),
|
||||
},
|
||||
{
|
||||
"initialize same struct twice",
|
||||
|
|
@ -107,7 +113,7 @@ var structTestCases = []testCase{
|
|||
return t1.x + t2.y
|
||||
}
|
||||
`,
|
||||
"53c56b6152c66b526c766b00527ac4546c766b51527ac46c6c766b00527ac46152c66b526c766b00527ac4546c766b51527ac46c6c766b51527ac46203006c766b00c300c36c766b51c351c393616c7566",
|
||||
big.NewInt(6),
|
||||
},
|
||||
{
|
||||
"struct methods",
|
||||
|
|
@ -129,7 +135,7 @@ var structTestCases = []testCase{
|
|||
return someInt
|
||||
}
|
||||
`,
|
||||
"53c56b6151c66b546c766b00527ac46c6c766b00527ac46c766b00c3616516006c766b51527ac46203006c766b51c3616c756652c56b6c766b00527ac46203006c766b00c300c3616c7566",
|
||||
big.NewInt(4),
|
||||
},
|
||||
{
|
||||
"struct methods with arguments",
|
||||
|
|
@ -152,7 +158,7 @@ var structTestCases = []testCase{
|
|||
return someInt
|
||||
}
|
||||
`,
|
||||
"53c56b6151c66b546c766b00527ac46c6c766b00527ac46c766b00c352545272616516006c766b51527ac46203006c766b51c3616c756654c56b6c766b00527ac46c766b51527ac46c766b52527ac46203006c766b00c300c36c766b51c3936c766b52c393616c7566",
|
||||
big.NewInt(10),
|
||||
},
|
||||
{
|
||||
"initialize struct partially",
|
||||
|
|
@ -172,7 +178,7 @@ var structTestCases = []testCase{
|
|||
return t.y
|
||||
}
|
||||
`,
|
||||
"52c56b6154c66b546c766b00527ac4006c766b51527ac4006c766b52527ac4006c766b53527ac46c6c766b00527ac46203006c766b00c351c3616c7566",
|
||||
big.NewInt(0),
|
||||
},
|
||||
{
|
||||
"test return struct from func",
|
||||
|
|
@ -198,7 +204,12 @@ var structTestCases = []testCase{
|
|||
return newToken()
|
||||
}
|
||||
`,
|
||||
"51c56b62030061650700616c756651c56b6203006154c66b516c766b00527ac4526c766b51527ac40568656c6c6f6c766b52527ac4006c766b53527ac46c616c7566",
|
||||
[]vm.StackItem{
|
||||
vm.NewBigIntegerItem(1),
|
||||
vm.NewBigIntegerItem(2),
|
||||
vm.NewByteArrayItem([]byte("hello")),
|
||||
vm.NewBigIntegerItem(0),
|
||||
},
|
||||
},
|
||||
{
|
||||
"pass struct as argument",
|
||||
|
|
@ -223,6 +234,6 @@ var structTestCases = []testCase{
|
|||
return x
|
||||
}
|
||||
`,
|
||||
"53c56b6151c66b5a6c766b00527ac46c6c766b00527ac4546c766b00c37c616516006c766b51527ac46203006c766b51c3616c756654c56b6c766b00527ac46c766b51527ac46c766b51c300c36c766b00c3936c766b51c3007bc46203006c766b51c300c3616c7566",
|
||||
big.NewInt(14),
|
||||
},
|
||||
}
|
||||
49
pkg/vm/test/vm_test.go
Normal file
49
pkg/vm/test/vm_test.go
Normal file
|
|
@ -0,0 +1,49 @@
|
|||
package vm_test
|
||||
|
||||
import (
|
||||
"strings"
|
||||
"testing"
|
||||
|
||||
"github.com/CityOfZion/neo-go/pkg/vm"
|
||||
"github.com/CityOfZion/neo-go/pkg/vm/compiler"
|
||||
"github.com/stretchr/testify/assert"
|
||||
)
|
||||
|
||||
type testCase struct {
|
||||
name string
|
||||
src string
|
||||
result interface{}
|
||||
}
|
||||
|
||||
func eval(t *testing.T, src string, result interface{}) {
|
||||
vm := vm.New(nil, vm.ModeMute)
|
||||
b, err := compiler.Compile(strings.NewReader(src), &compiler.Options{})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
vm.Load(b)
|
||||
vm.Run()
|
||||
assert.Equal(t, result, vm.PopResult())
|
||||
}
|
||||
|
||||
func TestVMAndCompilerCases(t *testing.T) {
|
||||
vm := vm.New(nil, vm.ModeMute)
|
||||
|
||||
testCases := []testCase{}
|
||||
testCases = append(testCases, numericTestCases...)
|
||||
testCases = append(testCases, assignTestCases...)
|
||||
testCases = append(testCases, arrayTestCases...)
|
||||
testCases = append(testCases, binaryExprTestCases...)
|
||||
testCases = append(testCases, structTestCases...)
|
||||
|
||||
for _, tc := range testCases {
|
||||
b, err := compiler.Compile(strings.NewReader(tc.src), &compiler.Options{})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
vm.Load(b)
|
||||
vm.Run()
|
||||
assert.Equal(t, tc.result, vm.PopResult())
|
||||
}
|
||||
}
|
||||
96
pkg/vm/vm.go
96
pkg/vm/vm.go
|
|
@ -7,11 +7,21 @@ import (
|
|||
"io/ioutil"
|
||||
"log"
|
||||
"math/big"
|
||||
"os"
|
||||
"text/tabwriter"
|
||||
|
||||
"github.com/CityOfZion/neo-go/pkg/util"
|
||||
"golang.org/x/crypto/ripemd160"
|
||||
)
|
||||
|
||||
// Mode configures behaviour of the VM.
|
||||
type Mode uint
|
||||
|
||||
// Available VM Modes.
|
||||
var (
|
||||
ModeMute Mode = 1 << 0
|
||||
)
|
||||
|
||||
// VM represents the virtual machine.
|
||||
type VM struct {
|
||||
state State
|
||||
|
|
@ -31,11 +41,11 @@ type VM struct {
|
|||
}
|
||||
|
||||
// New returns a new VM object ready to load .avm bytecode scripts.
|
||||
func New(svc *InteropService) *VM {
|
||||
func New(svc *InteropService, mode Mode) *VM {
|
||||
if svc == nil {
|
||||
svc = NewInteropService()
|
||||
}
|
||||
return &VM{
|
||||
vm := &VM{
|
||||
interop: svc,
|
||||
scripts: make(map[util.Uint160][]byte),
|
||||
state: haltState,
|
||||
|
|
@ -43,6 +53,29 @@ func New(svc *InteropService) *VM {
|
|||
estack: NewStack("evaluation"),
|
||||
astack: NewStack("alt"),
|
||||
}
|
||||
if mode == ModeMute {
|
||||
vm.mute = true
|
||||
}
|
||||
return vm
|
||||
}
|
||||
|
||||
// PrintOps will print the opcodes of the current loaded program to stdout.
|
||||
func (v *VM) PrintOps() {
|
||||
prog := v.Context().Program()
|
||||
w := tabwriter.NewWriter(os.Stdout, 0, 0, 4, ' ', 0)
|
||||
fmt.Fprintln(w, "INDEX\tOPCODE\tDESC\t")
|
||||
cursor := ""
|
||||
ip, _ := v.Context().CurrInstr()
|
||||
for i := 0; i < len(prog); i++ {
|
||||
if i == ip {
|
||||
cursor = "<<"
|
||||
} else {
|
||||
cursor = ""
|
||||
}
|
||||
fmt.Fprintf(w, "%d\t0x%2x\t%s\t%s\n", i, prog[i], Opcode(prog[i]), cursor)
|
||||
|
||||
}
|
||||
w.Flush()
|
||||
}
|
||||
|
||||
// AddBreakPoint adds a breakpoint to the current context.
|
||||
|
|
@ -58,16 +91,24 @@ func (v *VM) AddBreakPointRel(n int) {
|
|||
v.AddBreakPoint(ctx.ip + n)
|
||||
}
|
||||
|
||||
// Load will load a program from the given path, ready to execute it.
|
||||
func (v *VM) Load(path string) error {
|
||||
// LoadFile will load a program from the given path, ready to execute it.
|
||||
func (v *VM) LoadFile(path string) error {
|
||||
b, err := ioutil.ReadFile(path)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
v.istack.PushVal(NewContext(b))
|
||||
v.Load(b)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (v *VM) Load(prog []byte) {
|
||||
// clear all stacks, it could be a reload.
|
||||
v.istack.Clear()
|
||||
v.estack.Clear()
|
||||
v.astack.Clear()
|
||||
v.istack.PushVal(NewContext(prog))
|
||||
}
|
||||
|
||||
// LoadScript will load a script from the internal script table. It
|
||||
// will immediatly push a new context created from this script to
|
||||
// the invocation stack and starts executing it.
|
||||
|
|
@ -85,6 +126,12 @@ func (v *VM) Context() *Context {
|
|||
return v.istack.Peek(0).value.Value().(*Context)
|
||||
}
|
||||
|
||||
// PopResult is used to pop the first item of the evaluation stack. This allows
|
||||
// us to test compiler and vm in a bi-directional way.
|
||||
func (v *VM) PopResult() interface{} {
|
||||
return v.estack.Pop().value.Value()
|
||||
}
|
||||
|
||||
// Stack returns json formatted representation of the given stack.
|
||||
func (v *VM) Stack(n string) string {
|
||||
var s *Stack
|
||||
|
|
@ -196,7 +243,6 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
v.estack.PushVal(b)
|
||||
|
||||
// Stack operations.
|
||||
|
||||
case Otoaltstack:
|
||||
v.astack.Push(v.estack.Pop())
|
||||
|
||||
|
|
@ -239,6 +285,15 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
|
||||
v.estack.InsertAt(v.estack.Peek(0), n)
|
||||
|
||||
case Orot:
|
||||
c := v.estack.Pop()
|
||||
b := v.estack.Pop()
|
||||
a := v.estack.Pop()
|
||||
|
||||
v.estack.Push(b)
|
||||
v.estack.Push(c)
|
||||
v.estack.Push(a)
|
||||
|
||||
case Odepth:
|
||||
v.estack.PushVal(v.estack.Len())
|
||||
|
||||
|
|
@ -259,7 +314,7 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
panic("negative stack item returned")
|
||||
}
|
||||
if n > 0 {
|
||||
v.estack.Push(v.estack.RemoveAt(n - 1))
|
||||
v.estack.Push(v.estack.RemoveAt(n))
|
||||
}
|
||||
|
||||
case Odrop:
|
||||
|
|
@ -416,19 +471,19 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
case Onewarray:
|
||||
n := v.estack.Pop().BigInt().Int64()
|
||||
items := make([]StackItem, n)
|
||||
v.estack.PushVal(&arrayItem{items})
|
||||
v.estack.PushVal(&ArrayItem{items})
|
||||
|
||||
case Onewstruct:
|
||||
n := v.estack.Pop().BigInt().Int64()
|
||||
items := make([]StackItem, n)
|
||||
v.estack.PushVal(&structItem{items})
|
||||
v.estack.PushVal(&StructItem{items})
|
||||
|
||||
case Oappend:
|
||||
itemElem := v.estack.Pop()
|
||||
arrElem := v.estack.Pop()
|
||||
|
||||
switch t := arrElem.value.(type) {
|
||||
case *arrayItem, *structItem:
|
||||
case *ArrayItem, *StructItem:
|
||||
arr := t.Value().([]StackItem)
|
||||
arr = append(arr, itemElem.value)
|
||||
default:
|
||||
|
|
@ -464,7 +519,7 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
|
||||
switch t := obj.value.(type) {
|
||||
// Struct and Array items have their underlying value as []StackItem.
|
||||
case *arrayItem, *structItem:
|
||||
case *ArrayItem, *StructItem:
|
||||
arr := t.Value().([]StackItem)
|
||||
if index < 0 || index >= len(arr) {
|
||||
panic("PICKITEM: invalid index")
|
||||
|
|
@ -477,22 +532,22 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
|
||||
case Osetitem:
|
||||
var (
|
||||
obj = v.estack.Pop()
|
||||
key = v.estack.Pop()
|
||||
item = v.estack.Pop().value
|
||||
key = v.estack.Pop()
|
||||
obj = v.estack.Pop()
|
||||
index = int(key.BigInt().Int64())
|
||||
)
|
||||
|
||||
switch t := obj.value.(type) {
|
||||
// Struct and Array items have their underlying value as []StackItem.
|
||||
case *arrayItem, *structItem:
|
||||
case *ArrayItem, *StructItem:
|
||||
arr := t.Value().([]StackItem)
|
||||
if index < 0 || index >= len(arr) {
|
||||
panic("PICKITEM: invalid index")
|
||||
panic("SETITEM: invalid index")
|
||||
}
|
||||
arr[index] = item
|
||||
default:
|
||||
panic("SETITEM: unknown type")
|
||||
panic(fmt.Sprintf("SETITEM: invalid item type %s", t))
|
||||
}
|
||||
|
||||
case Oarraysize:
|
||||
|
|
@ -504,12 +559,13 @@ func (v *VM) execute(ctx *Context, op Opcode) {
|
|||
v.estack.PushVal(len(arr))
|
||||
|
||||
case Ojmp, Ojmpif, Ojmpifnot:
|
||||
rOffset := ctx.readUint16()
|
||||
offset := ctx.ip + int(rOffset) - 3 // sizeOf(uint16 + uint8)
|
||||
var (
|
||||
rOffset = int16(ctx.readUint16())
|
||||
offset = ctx.ip + int(rOffset) - 3 // sizeOf(int16 + uint8)
|
||||
)
|
||||
if offset < 0 || offset > len(ctx.prog) {
|
||||
panic("JMP: invalid offset")
|
||||
panic(fmt.Sprintf("JMP: invalid offset %d ip at %d", offset, ctx.ip))
|
||||
}
|
||||
|
||||
cond := true
|
||||
if op > Ojmp {
|
||||
cond = v.estack.Pop().Bool()
|
||||
|
|
|
|||
Loading…
Reference in a new issue