bjoernager/rust
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malloc should return null for zst allocs

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Oliver Schneider 2017-06-22 08:52:53 +02:00 • committed by GitHub
parent a630677b01
commit a805606d45
1 changed files with 11 additions and 5 deletions
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16
src/terminator/mod.rs
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@ -561,14 +561,20 @@ impl<'a, 'tcx> EvalContext<'a, 'tcx> {
match &link_name[..] {
"malloc" => {
let size = self.value_to_primval(args[0], usize)?.to_u64()?;
let align = self.memory.pointer_size();
let ptr = self.memory.allocate(size, align)?;
self.write_primval(dest, PrimVal::Ptr(ptr), dest_ty)?;
if size == 0 {
self.write_primval(dest, PrimVal::Bytes(0), dest_ty)?;
} else {
let align = self.memory.pointer_size();
let ptr = self.memory.allocate(size, align)?;
self.write_primval(dest, PrimVal::Ptr(ptr), dest_ty)?;
}
}
"free" => {
let ptr = args[0].read_ptr(&self.memory)?.to_ptr()?;
self.memory.deallocate(ptr)?;
let ptr = args[0].read_ptr(&self.memory)?;
if !ptr.is_null() {
self.memory.deallocate(ptr.to_ptr()?)?;
}
}
"syscall" => {