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 throw_unsup_format!("Unsupported dlsym: {}", name),
24 impl<'mir, 'tcx> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
25 pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
29 args: &[OpTy<'tcx, Tag>],
30 dest: Option<PlaceTy<'tcx, Tag>>,
31 ret: Option<mir::BasicBlock>,
32 ) -> InterpResult<'tcx> {
35 let this = self.eval_context_mut();
37 let dest = dest.expect("we don't support any diverging dlsym");
38 let ret = ret.expect("dest is `Some` but ret is `None`");
42 let ptr = this.read_scalar(args[0])?.not_undef()?;
43 let len = this.read_scalar(args[1])?.to_usize(this)?;
44 this.gen_random(ptr, len as usize)?;
45 this.write_null(dest)?;
49 this.goto_block(Some(ret))?;
50 this.dump_place(*dest);