diff options
Diffstat (limited to 'sys_util')
| -rw-r--r-- | sys_util/src/guest_memory.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys_util/src/guest_memory.rs b/sys_util/src/guest_memory.rs index d40b5be..162960f 100644 --- a/sys_util/src/guest_memory.rs +++ b/sys_util/src/guest_memory.rs @@ -229,6 +229,14 @@ impl GuestMemory { .any(|region| region.guest_base <= addr && addr < region_end(region)) } + /// Returns true if the given range (start, end) is overlap with the memory range + /// available to the guest. + pub fn range_overlap(&self, start: GuestAddress, end: GuestAddress) -> bool { + self.regions + .iter() + .any(|region| region.guest_base < end && start < region_end(region)) + } + /// Returns the address plus the offset if it is in range. pub fn checked_offset(&self, addr: GuestAddress, offset: u64) -> Option<GuestAddress> { addr.checked_add(offset).and_then(|a| { @@ -614,6 +622,19 @@ mod tests { assert_eq!(gm.address_in_range(GuestAddress(0x3000)), false); assert_eq!(gm.address_in_range(GuestAddress(0x5000)), true); assert_eq!(gm.address_in_range(GuestAddress(0x6000)), false); + assert_eq!(gm.address_in_range(GuestAddress(0x6000)), false); + assert_eq!( + gm.range_overlap(GuestAddress(0x1000), GuestAddress(0x3000)), + true + ); + assert_eq!( + gm.range_overlap(GuestAddress(0x3000), GuestAddress(0x4000)), + false + ); + assert_eq!( + gm.range_overlap(GuestAddress(0x3000), GuestAddress(0x7000)), + true + ); assert!(gm.checked_offset(GuestAddress(0x1000), 0x1000).is_none()); assert!(gm.checked_offset(GuestAddress(0x5000), 0x800).is_some()); assert!(gm.checked_offset(GuestAddress(0x5000), 0x1000).is_none()); |