diff options
Diffstat (limited to 'pkg/sentry/memmap/memmap.go')
| -rw-r--r-- | pkg/sentry/memmap/memmap.go | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/pkg/sentry/memmap/memmap.go b/pkg/sentry/memmap/memmap.go index 72986cbb9..cdc5f2b27 100644 --- a/pkg/sentry/memmap/memmap.go +++ b/pkg/sentry/memmap/memmap.go @@ -49,13 +49,14 @@ type Mappable interface { // CopyMapping notifies the Mappable of an attempt to copy a mapping in ms // from srcAR to dstAR. For most Mappables, this is equivalent to - // AddMapping. + // AddMapping. Note that it is possible that srcAR.Length() != dstAR.Length(), + // and also that srcAR.Length() == 0. // // CopyMapping is only called when a mapping is copied within a given // MappingSpace; it is analogous to Linux's vm_operations_struct::mremap. // - // Preconditions: offset+dstAR.Length() does not overflow. The mapping at - // srcAR must exist. + // Preconditions: offset+srcAR.Length() and offset+dstAR.Length() do not + // overflow. The mapping at srcAR must exist. CopyMapping(ctx context.Context, ms MappingSpace, srcAR, dstAR usermem.AddrRange, offset uint64) error // Translate returns the Mappable's current mappings for at least the range |