func (p *memImage) traceMem(u models.Usercorn, addr uint64, data []byte) {
if len(data) > p.blockSize {
firstLen := (addr+uint64(p.blockSize)-1) & ^uint64(p.blockSize-1) - addr
if firstLen > 0 {
p.traceMem(u, addr, data[:firstLen])
}
for i := firstLen; i < uint64(len(data)); i += uint64(p.blockSize) {
p.traceMem(u, addr+uint64(i), data[i:i+uint64(p.blockSize)])
}
return
}
i, m, had := p.find(addr)
if !had {
aligned := addr & ^uint64(p.blockSize-1)
r := ®ion{
Addr: aligned,
Size: uint64(p.blockSize),
Data: make([]byte, p.blockSize),
}
for _, v := range u.Mappings() {
if v.Contains(addr) {
r.Desc = v.Desc
r.Prot = v.Prot
if v.File != nil {
r.Filename = v.File.Name
}
break
}
}
p.maps = append(p.maps, r)
sort.Sort(RegionAddrSort(p.maps))
i, m, _ = p.find(addr)
p.resize()
}
off := (addr - m.Addr)
dst := m.Data[off:]
for i, v := range data {
if (dst[i] == 0) != (v == 0) {
if v != 0 {
m.ByteCount++
} else {
m.ByteCount--
}
}
dst[i] = v
}
if m.ByteCount == 0 {
p.maps = append(p.maps[:i], p.maps[i+1:]...)
p.resize()
}
}