5 #[derive(Debug, Copy, Clone)]
11 // Returns an error for unsupported symbols, and None if this symbol
12 // should become a NULL pointer (pretend it does not exist).
13 pub fn from_str(name: &str) -> InterpResult<'static, Option<Dlsym>> {
16 "getentropy" => Some(GetEntropy),
17 "__pthread_get_minstack" => None,
19 return err!(Unimplemented(format!(
20 "Unsupported dlsym: {}", name
26 impl<'mir, 'tcx> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
27 pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
31 args: &[OpTy<'tcx, Tag>],
32 dest: Option<PlaceTy<'tcx, Tag>>,
33 ret: Option<mir::BasicBlock>,
34 ) -> InterpResult<'tcx> {
37 let this = self.eval_context_mut();
39 let dest = dest.expect("we don't support any diverging dlsym");
40 let ret = ret.expect("dest is `Some` but ret is `None`");
44 let ptr = this.read_scalar(args[0])?.not_undef()?;
45 let len = this.read_scalar(args[1])?.to_usize(this)?;
46 this.gen_random(len as usize, ptr)?;
47 this.write_null(dest)?;
51 this.goto_block(Some(ret))?;
52 this.dump_place(*dest);