+pub mod dlsym;
+pub mod env;
pub mod foreign_items;
pub mod intrinsics;
pub mod tls;
-pub mod dlsym;
-pub mod env;
-use rustc::{ty, mir};
+use rustc::{mir, ty};
use crate::*;
ret: Option<mir::BasicBlock>,
) -> InterpResult<'tcx, Option<&'mir mir::Body<'tcx>>> {
let this = self.eval_context_mut();
- trace!("eval_fn_call: {:#?}, {:?}", instance, dest.map(|place| *place));
+ trace!(
+ "eval_fn_call: {:#?}, {:?}",
+ instance,
+ dest.map(|place| *place)
+ );
// First, run the common hooks also supported by CTFE.
if this.hook_fn(instance, args, dest)? {
// There are some more lang items we want to hook that CTFE does not hook (yet).
if this.tcx.lang_items().align_offset_fn() == Some(instance.def.def_id()) {
let dest = dest.unwrap();
- let n = this.align_offset(args[0], args[1], dest.layout)?;
+ let n = this
+ .align_offset(args[0], args[1])?
+ .unwrap_or_else(|| this.truncate(u128::max_value(), dest.layout));
this.write_scalar(Scalar::from_uint(n, dest.layout.size), dest)?;
this.goto_block(ret)?;
return Ok(None);
&mut self,
ptr_op: OpTy<'tcx, Tag>,
align_op: OpTy<'tcx, Tag>,
- layout: ty::layout::TyLayout<'tcx>,
- ) -> InterpResult<'tcx, u128> {
+ ) -> InterpResult<'tcx, Option<u128>> {
let this = self.eval_context_mut();
let req_align = this.force_bits(
this.read_scalar(align_op)?.not_undef()?,
- this.pointer_size()
+ this.pointer_size(),
)? as usize;
// FIXME: This should actually panic in the interpreted program
let ptr_scalar = this.read_scalar(ptr_op)?.not_undef()?;
- if let Scalar::Ptr(ptr) = ptr_scalar {
+ if let Ok(ptr) = this.force_ptr(ptr_scalar) {
let cur_align = this.memory().get(ptr.alloc_id)?.align.bytes() as usize;
- if cur_align < req_align {
- return Ok(this.truncate(u128::max_value(), layout));
+ if cur_align >= req_align {
+ // if the allocation alignment is at least the required alignment we use the
+ // libcore implementation
+ return Ok(Some(
+ (this.force_bits(ptr_scalar, this.pointer_size())? as *const i8)
+ .align_offset(req_align) as u128,
+ ));
}
}
-
- // if the allocation alignment is at least the required alignment or if the pointer is an
- // integer, we use the libcore implementation
- Ok(
- (this.force_bits(ptr_scalar, this.pointer_size())? as *const i8)
- .align_offset(req_align) as u128
- )
+ // If the allocation alignment is smaller than then required alignment or the pointer was
+ // actually an integer, we return `None`
+ Ok(None)
}
}