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solver: fix exporters unsafely sharing records 

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
master
Tonis Tiigi 2021-10-08 19:51:11 -07:00
parent ba673bbdab
commit 4cec7a064c
1 changed files with 14 additions and 6 deletions
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20
solver/exporter.go
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@ -11,7 +11,6 @@ type exporter struct {
records []*CacheRecord
record *CacheRecord
res []CacheExporterRecord
edge *edge // for secondaryExporters
override *bool
}
@ -52,9 +51,10 @@ func addBacklinks(t CacheExporterTarget, rec CacheExporterRecord, cm *cacheManag
return rec, nil
}
type backlinkT struct{}
type contextT string
var backlinkKey = backlinkT{}
var backlinkKey = contextT("solver/exporter/backlinks")
var resKey = contextT("solver/exporter/res")
func (e *exporter) ExportTo(ctx context.Context, t CacheExporterTarget, opt CacheExportOpt) ([]CacheExporterRecord, error) {
var bkm map[string]CacheExporterRecord
@ -66,8 +66,16 @@ func (e *exporter) ExportTo(ctx context.Context, t CacheExporterTarget, opt Cach
bkm = bk.(map[string]CacheExporterRecord)
}
var res map[*exporter][]CacheExporterRecord
if r := ctx.Value(resKey); r == nil {
res = map[*exporter][]CacheExporterRecord{}
ctx = context.WithValue(ctx, resKey, res)
} else {
res = r.(map[*exporter][]CacheExporterRecord)
}
if t.Visited(e) {
return e.res, nil
return res[e], nil
}
t.Visit(e)
@ -180,9 +188,9 @@ func (e *exporter) ExportTo(ctx context.Context, t CacheExporterTarget, opt Cach
}
}
e.res = allRec
res[e] = allRec
return e.res, nil
return allRec, nil
}
func getBestResult(records []*CacheRecord) *CacheRecord {