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// Copyright 2015 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package prog
import (
"math/rand"
)
// Generate generates a random program with ncalls calls.
// ct contains a set of allowed syscalls, if nil all syscalls are used.
func (target *Target) Generate(rs rand.Source, ncalls int, ct *ChoiceTable) *Prog {
p := &Prog{
Target: target,
}
r := newRand(target, rs)
s := newState(target, ct, nil)
for len(p.Calls) < ncalls {
calls := r.generateCall(s, p, len(p.Calls))
for _, c := range calls {
s.analyze(c)
p.Calls = append(p.Calls, c)
}
}
// For the last generated call we could get additional calls that create
// resources and overflow ncalls. Remove some of these calls.
// The resources in the last call will be replaced with the default values,
// which is exactly what we want.
for len(p.Calls) > ncalls {
p.RemoveCall(ncalls - 1)
}
p.sanitizeFix()
p.debugValidate()
return p
}
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