user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

avoid some Vector allocations

Browse source
This commit is contained in:
Ralf Jung 2025-10-15 14:17:22 +02:00
parent 7c419e8623
commit 51cab7c0df
1 changed files with 2 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/tools/miri/src/shims/native_lib/ffi.rs
View file

@ -9,13 +9,8 @@ use libffi::middle::{Arg as ArgPtr, Cif, Type as FfiType};
///
/// The safety invariants of the foreign function being called must be upheld (if any).
pub unsafe fn call<R: libffi::high::CType>(fun: CodePtr, args: &mut [OwnedArg]) -> R {
let mut cif_args = vec![];
let mut arg_ptrs = vec![];
for a in args {
cif_args.push(a.ty.take().unwrap());
arg_ptrs.push(ArgPtr::new(&*a.bytes));
}
let cif = Cif::new(cif_args, R::reify().into_middle());
let cif = Cif::new(args.iter_mut().map(|arg| arg.ty.take().unwrap()), R::reify().into_middle());
let arg_ptrs: Vec<_> = args.iter().map(|arg| ArgPtr::new(&*arg.bytes)).collect();
// SAFETY: Caller upholds that the function is safe to call.
unsafe { cif.call(fun, &arg_ptrs) }
}