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don't bother inserting integer relocations into the relocation table

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This commit is contained in:
Ralf Jung 2017-06-05 17:14:48 -07:00
parent 36505c7b40
commit 7bfda59fe2
1 changed files with 5 additions and 9 deletions
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14
src/memory.rs
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@ -620,7 +620,7 @@ impl<'a, 'tcx> Memory<'a, 'tcx> {
if size == 0 {
return Ok(&[]);
}
if self.has_non_int_relocations(ptr, size)? {
if self.relocations(ptr, size)?.count() != 0 {
return Err(EvalError::ReadPointerAsBytes);
}
self.check_defined(ptr, size)?;
@ -718,7 +718,7 @@ impl<'a, 'tcx> Memory<'a, 'tcx> {
let offset = ptr.offset as usize;
match alloc.bytes[offset..].iter().position(|&c| c == 0) {
Some(size) => {
if self.has_non_int_relocations(ptr, (size + 1) as u64)? {
if self.relocations(ptr, (size + 1) as u64)?.count() != 0 {
return Err(EvalError::ReadPointerAsBytes);
}
self.check_defined(ptr, (size + 1) as u64)?;
@ -761,7 +761,9 @@ impl<'a, 'tcx> Memory<'a, 'tcx> {
pub fn write_ptr(&mut self, dest: Pointer, ptr: Pointer) -> EvalResult<'tcx> {
self.write_usize(dest, ptr.offset as u64)?;
self.get_mut(dest.alloc_id)?.relocations.insert(dest.offset, ptr.alloc_id);
if ptr.alloc_id != NEVER_ALLOC_ID {
self.get_mut(dest.alloc_id)?.relocations.insert(dest.offset, ptr.alloc_id);
}
Ok(())
}
@ -902,12 +904,6 @@ impl<'a, 'tcx> Memory<'a, 'tcx> {
Ok(self.get(ptr.alloc_id)?.relocations.range(start..end))
}
fn has_non_int_relocations(&self, ptr: Pointer, size: u64)
-> EvalResult<'tcx, bool>
{
Ok(self.relocations(ptr, size)?.any(|(_, &alloc_id)| alloc_id != NEVER_ALLOC_ID))
}
fn clear_relocations(&mut self, ptr: Pointer, size: u64) -> EvalResult<'tcx> {
// Find all relocations overlapping the given range.
let keys: Vec<_> = self.relocations(ptr, size)?.map(|(&k, _)| k).collect();