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// Copyright 2024 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 (
"context"
"fmt"
"cloud.google.com/go/civil"
"cloud.google.com/go/spanner"
"github.com/google/syzkaller/pkg/coveragedb"
"github.com/google/syzkaller/pkg/coveragedb/spannerclient"
"google.golang.org/api/iterator"
)
// This file contains definitions of entities stored in spanner.
type CoverageHistory struct {
instrumented map[string]int64
covered map[string]int64
periods map[coveragedb.TimePeriod]struct{}
}
// MergedCoverage uses dates, not time.
func MergedCoverage(ctx context.Context, client spannerclient.SpannerClient, ns, periodType string,
) (*CoverageHistory, error) {
minDays, maxDays, err := coveragedb.MinMaxDays(periodType)
if err != nil {
return nil, fmt.Errorf("coveragedb.MinMaxDays: %w", err)
}
pOps, err := coveragedb.PeriodOps(periodType)
if err != nil {
return nil, fmt.Errorf("coveragedb.PeriodOps: %w", err)
}
stmt := spanner.Statement{
SQL: `
select
dateto as targetdate,
duration as days,
cast(sum(instrumented) as INTEGER) as instrumented,
cast(sum(covered) as INTEGER) as covered
from merge_history join files
on merge_history.session = files.session
where namespace=$1 and duration>=$2 and duration<=$3
group by dateto, duration`,
Params: map[string]interface{}{
"p1": ns,
"p2": minDays,
"p3": maxDays,
},
}
iter := client.Single().Query(ctx, stmt)
defer iter.Stop()
res := &CoverageHistory{
instrumented: map[string]int64{},
covered: map[string]int64{},
periods: map[coveragedb.TimePeriod]struct{}{},
}
for {
row, err := iter.Next()
if err == iterator.Done {
break
}
if err != nil {
return nil, fmt.Errorf("failed to iter.Next() spanner DB: %w", err)
}
var r struct {
Targetdate civil.Date
Days int64
Instrumented int64
Covered int64
}
if err = row.ToStruct(&r); err != nil {
return nil, fmt.Errorf("failed to row.ToStruct() spanner DB: %w", err)
}
period := coveragedb.TimePeriod{DateTo: r.Targetdate, Days: int(r.Days)}
if !pOps.IsValidPeriod(period) {
continue
}
res.instrumented[r.Targetdate.String()] = r.Instrumented
res.covered[r.Targetdate.String()] = r.Covered
if _, found := res.periods[period]; found {
return nil, fmt.Errorf("db error: only one period expected for date %s, days %d",
period.DateTo.String(), period.Days)
}
res.periods[period] = struct{}{}
}
return res, nil
}
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