forked from TrueCloudLab/neoneo-go
vm: add unload
command
When execution fails it's the only way to change the prompt showing the last executed instruction. Example: ``` NEO-GO-VM > loadgo examples/engine/engine.go READY: loaded 117 instructions NEO-GO-VM 0 > run Error: at instruction 3 (SYSCALL): failed to invoke syscall 805851437: syscall not found NEO-GO-VM 8 > parse Error: missing argument NEO-GO-VM 8 > parse 123 Integer to Hex 7b Integer to Base64 ew== String to Hex 313233 String to Base64 MTIz NEO-GO-VM 8 > unload NEO-GO-VM > exit ```
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2 changed files with 32 additions and 0 deletions
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@ -136,6 +136,11 @@ both parameters are mandatory, example:
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> loadgo /path/to/file.go`,
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Action: handleLoadGo,
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},
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{
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Name: "reset",
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Usage: "Unload compiled script from the VM",
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Action: handleReset,
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},
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{
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Name: "parse",
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Usage: "Parse provided argument and convert it into other possible formats",
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@ -288,6 +293,11 @@ func getVMFromContext(app *cli.App) *vm.VM {
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return app.Metadata[vmKey].(*vm.VM)
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}
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func setVMInContext(app *cli.App, v *vm.VM) {
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old := getVMFromContext(app)
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*old = *v
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}
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func getManifestFromContext(app *cli.App) *manifest.Manifest {
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return app.Metadata[manifestKey].(*manifest.Manifest)
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}
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@ -466,6 +476,12 @@ func handleLoadGo(c *cli.Context) error {
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return nil
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}
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func handleReset(c *cli.Context) error {
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setVMInContext(c.App, vm.New())
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changePrompt(c.App)
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return nil
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}
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func getManifestFromFile(name string) (*manifest.Manifest, error) {
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bs, err := ioutil.ReadFile(name)
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if err != nil {
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@ -641,3 +641,19 @@ func TestExit(t *testing.T) {
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e.runProg(t, "exit")
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require.True(t, e.exit.Load())
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}
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func TestReset(t *testing.T) {
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script := []byte{byte(opcode.PUSH1)}
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e := newTestVMCLI(t)
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e.runProg(t,
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"loadhex "+hex.EncodeToString(script),
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"ops",
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"reset",
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"ops")
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e.checkNextLine(t, "READY: loaded 1 instructions")
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e.checkNextLine(t, "INDEX.*OPCODE.*PARAMETER")
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e.checkNextLine(t, "0.*PUSH1.*")
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e.checkNextLine(t, "")
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e.checkError(t, fmt.Errorf("VM is not ready: no program loaded"))
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}
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