74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
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package main
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import (
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"errors"
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"time"
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"github.com/perlin-network/life/compiler"
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"github.com/perlin-network/life/exec"
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)
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type Process struct {
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Output []byte
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}
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// ResolveGlobal does nothing, currently.
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func (p *Process) ResolveGlobal(module, field string) int64 { return 0 }
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// ResolveFunc resolves h's ABI and importable function.
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func (p *Process) ResolveFunc(module, field string) exec.FunctionImport {
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switch module {
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case "h":
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switch field {
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case "h":
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return func(vm *exec.VirtualMachine) int64 {
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frame := vm.GetCurrentFrame()
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data := frame.Locals[0]
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p.Output = append(p.Output, byte(data))
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return 0
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}
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default:
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panic("impossible state")
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}
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default:
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panic("impossible state")
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}
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}
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type ExecResult struct {
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Output string `json:"out"`
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GasUsed uint64 `json:"gas"`
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ExecTime time.Duration `json:"exec_duration"`
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}
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func run(bin []byte) (*ExecResult, error) {
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p := &Process{}
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var cfg exec.VMConfig
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gp := &compiler.SimpleGasPolicy{GasPerInstruction: 1}
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vm, err := exec.NewVirtualMachine(bin, cfg, p, gp)
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if err != nil {
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return nil, err
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}
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mainFunc, ok := vm.GetFunctionExport("h")
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if !ok {
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return nil, errors.New("impossible state: no h function exposed")
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}
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t0 := time.Now()
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_, err = vm.Run(mainFunc)
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if err != nil {
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return nil, err
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}
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return &ExecResult{
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Output: string(p.Output),
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GasUsed: vm.Gas,
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ExecTime: time.Since(t0),
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}, nil
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}
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