51 lines
919 B
Go
51 lines
919 B
Go
package main
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import (
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"context"
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"flag"
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"os"
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"github.com/Xe/ln"
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)
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func main() {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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flag.Parse()
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if flag.NArg() != 1 {
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ln.Fatal(ctx, ln.Info("please pass a webassembly file to run"))
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}
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fname := flag.Arg(0)
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fin, err := os.Open(fname)
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if err != nil {
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ln.FatalErr(ctx, err, ln.F{"msg": "can't open file", "fname": fname})
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}
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defer fin.Close()
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p, err := NewProcess(fin)
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if err != nil {
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ln.FatalErr(ctx, err, ln.F{"msg": "can't create process", "fname": fname})
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}
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foundMain := false
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mainID := uint32(0)
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for name, entry := range p.mod.Export.Entries {
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if name == "main" && entry.FieldStr == "main" {
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mainID = entry.Index
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foundMain = true
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break
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}
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}
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if !foundMain {
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ln.Fatal(ctx, ln.F{"msg": "no main function exported"})
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}
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_, err = p.vm.ExecCode(int64(mainID))
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if err != nil {
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ln.FatalErr(ctx, err)
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}
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}
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