4 impl<'mir, 'tcx> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
5 pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
6 fn emulate_foreign_item_by_name(
9 args: &[OpTy<'tcx, Tag>],
10 dest: PlaceTy<'tcx, Tag>,
11 _ret: mir::BasicBlock,
12 ) -> InterpResult<'tcx, bool> {
13 let this = self.eval_context_mut();
16 "__errno_location" => {
17 let errno_place = this.machine.last_error.unwrap();
18 this.write_scalar(errno_place.to_ref().to_scalar()?, dest)?;
23 let result = this.open(args[0], args[1])?;
24 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
28 let result = this.close(args[0])?;
29 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
33 let result = this.lseek64(args[0], args[1], args[2])?;
34 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
39 let result = this.clock_gettime(args[0], args[1])?;
40 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
44 "pthread_getattr_np" => {
45 this.write_null(dest)?;
49 let sys_getrandom = this
50 .eval_path_scalar(&["libc", "SYS_getrandom"])?
51 .expect("Failed to get libc::SYS_getrandom")
52 .to_machine_usize(this)?;
55 .eval_path_scalar(&["libc", "SYS_statx"])?
56 .expect("Failed to get libc::SYS_statx")
57 .to_machine_usize(this)?;
59 match this.read_scalar(args[0])?.to_machine_usize(this)? {
60 // `libc::syscall(NR_GETRANDOM, buf.as_mut_ptr(), buf.len(), GRND_NONBLOCK)`
61 // is called if a `HashMap` is created the regular way (e.g. HashMap<K, V>).
62 id if id == sys_getrandom => {
63 // The first argument is the syscall id,
65 super::getrandom(this, &args[1..], dest)?;
67 id if id == sys_statx => {
68 // The first argument is the syscall id,
70 let result = this.statx(args[1], args[2], args[3], args[4], args[5])?;
71 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
73 id => throw_unsup_format!("miri does not support syscall ID {}", id),
78 super::getrandom(this, args, dest)?;
81 "sched_getaffinity" => {
82 // Return an error; `num_cpus` then falls back to `sysconf`.
83 this.write_scalar(Scalar::from_int(-1, dest.layout.size), dest)?;
86 _ => throw_unsup_format!("can't call foreign function: {}", link_name),