Trait miri::shims::ffi_support::EvalContextExt

pub trait EvalContextExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
    fn scalar_to_carg(
        k: Scalar<Provenance>,
        arg_type: Ty<'tcx>,
        cx: &impl HasDataLayout
    ) -> InterpResult<'tcx, CArg> { ... }
    fn call_external_c_and_store_return<'a>(
        &mut self,
        link_name: Symbol,
        dest: &PlaceTy<'tcx, Provenance>,
        ptr: CodePtr,
        libffi_args: Vec<Arg<'a>>
    ) -> InterpResult<'tcx, ()> { ... }
    fn get_func_ptr_explicitly_from_lib(
        &mut self,
        link_name: Symbol
    ) -> Option<CodePtr> { ... }
    fn call_external_c_fct(
        &mut self,
        link_name: Symbol,
        dest: &PlaceTy<'tcx, Provenance>,
        args: &[OpTy<'tcx, Provenance>]
    ) -> InterpResult<'tcx, bool> { ... }
}

Provided Methods

fn scalar_to_carg(
    k: Scalar<Provenance>,
    arg_type: Ty<'tcx>,
    cx: &impl HasDataLayout
) -> InterpResult<'tcx, CArg>

Extract the scalar value from the result of reading a scalar from the machine, and convert it to a CArg.

fn call_external_c_and_store_return<'a>(
    &mut self,
    link_name: Symbol,
    dest: &PlaceTy<'tcx, Provenance>,
    ptr: CodePtr,
    libffi_args: Vec<Arg<'a>>
) -> InterpResult<'tcx, ()>

Call external C function and store output, depending on return type in the function signature.

fn get_func_ptr_explicitly_from_lib(
    &mut self,
    link_name: Symbol
) -> Option<CodePtr>

Get the pointer to the function of the specified name in the shared object file, if it exists. The function must be in the shared object file specified: we do not return pointers to functions in dependencies of the library.

fn call_external_c_fct(
    &mut self,
    link_name: Symbol,
    dest: &PlaceTy<'tcx, Provenance>,
    args: &[OpTy<'tcx, Provenance>]
) -> InterpResult<'tcx, bool>

Call specified external C function, with supplied arguments. Need to convert all the arguments from their hir representations to a form compatible with C (through libffi call). Then, convert return from the C call into a corresponding form that can be stored in Miri internal memory.

Implementors

impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for MiriInterpCx<'mir, 'tcx>