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cover.go
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cover.go
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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 main
import (
"sync"
"github.com/google/syzkaller/pkg/cover"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/mgrconfig"
)
var (
cachedRepGenMu sync.Mutex
cachedRepGen *cover.ReportGenerator
)
func getReportGenerator(cfg *mgrconfig.Config, modules []cover.KernelModule) (*cover.ReportGenerator, error) {
cachedRepGenMu.Lock()
defer cachedRepGenMu.Unlock()
if cachedRepGen == nil {
log.Logf(0, "initializing coverage information...")
rg, err := cover.MakeReportGenerator(cfg, cfg.KernelSubsystem, modules, cfg.RawCover)
if err != nil {
return nil, err
}
cachedRepGen = rg
}
return cachedRepGen, nil
}
func resetReportGenerator() {
cachedRepGenMu.Lock()
defer cachedRepGenMu.Unlock()
cachedRepGen = nil
}
func coverToPCs(rg *cover.ReportGenerator, cov []uint32) []uint64 {
pcs := make([]uint64, 0, len(cov))
for _, pc := range cov {
pcs = append(pcs, rg.RestorePC(pc))
}
return pcs
}