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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 cover provides types for working with coverage information (arrays of covered PCs).
package cover
type Cover map[uint64]struct{}
func FromRaw(raw []uint64) Cover {
var c Cover
c.Merge(raw)
return c
}
func (cov *Cover) Merge(raw []uint64) {
c := *cov
if c == nil {
c = make(Cover)
*cov = c
}
for _, pc := range raw {
c[pc] = struct{}{}
}
}
// Merge merges raw into coverage and returns newly added PCs. Overwrites/mutates raw.
func (cov *Cover) MergeDiff(raw []uint64) []uint64 {
c := *cov
if c == nil {
c = make(Cover)
*cov = c
}
n := 0
for _, pc := range raw {
if _, ok := c[pc]; ok {
continue
}
c[pc] = struct{}{}
raw[n] = pc
n++
}
return raw[:n]
}
func (cov *Cover) Serialize() []uint64 {
res := make([]uint64, 0, len(*cov))
for pc := range *cov {
res = append(res, pc)
}
return res
}
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