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