1 #![feature(rustc_private)]
3 extern crate rustc_codegen_ssa;
4 extern crate rustc_errors;
5 extern crate rustc_middle;
7 extern crate rustc_data_structures;
8 extern crate rustc_driver;
9 extern crate rustc_hir;
10 extern crate rustc_session;
11 extern crate rustc_span;
12 extern crate rustc_symbol_mangling;
13 extern crate rustc_target;
15 use rustc_codegen_ssa::traits::CodegenBackend;
16 use rustc_data_structures::owning_ref::OwningRef;
17 use rustc_data_structures::sync::MetadataRef;
18 use rustc_errors::ErrorReported;
19 use rustc_middle::dep_graph::DepGraph;
20 use rustc_middle::middle::cstore::{EncodedMetadata, MetadataLoader, MetadataLoaderDyn};
21 use rustc_middle::ty::query::Providers;
22 use rustc_middle::ty::TyCtxt;
23 use rustc_session::config::OutputFilenames;
24 use rustc_session::Session;
25 use rustc_span::symbol::Symbol;
26 use rustc_target::spec::Target;
30 pub struct NoLlvmMetadataLoader;
32 impl MetadataLoader for NoLlvmMetadataLoader {
33 fn get_rlib_metadata(&self, _: &Target, filename: &Path) -> Result<MetadataRef, String> {
35 std::fs::read(filename).map_err(|e| format!("metadata file open err: {:?}", e))?;
36 let buf: OwningRef<Vec<u8>, [u8]> = OwningRef::new(buf);
37 Ok(rustc_erase_owner!(buf.map_owner_box()))
40 fn get_dylib_metadata(&self, target: &Target, filename: &Path) -> Result<MetadataRef, String> {
41 self.get_rlib_metadata(target, filename)
47 impl CodegenBackend for TheBackend {
48 fn metadata_loader(&self) -> Box<MetadataLoaderDyn> {
49 Box::new(NoLlvmMetadataLoader)
52 fn provide(&self, providers: &mut Providers) {
53 rustc_symbol_mangling::provide(providers);
55 providers.target_features_whitelist = |tcx, _cnum| {
56 Default::default() // Just a dummy
58 providers.is_reachable_non_generic = |_tcx, _defid| true;
59 providers.exported_symbols = |_tcx, _crate| &[];
62 fn provide_extern(&self, providers: &mut Providers) {
63 providers.is_reachable_non_generic = |_tcx, _defid| true;
66 fn codegen_crate<'a, 'tcx>(
69 _metadata: EncodedMetadata,
70 _need_metadata_module: bool,
72 use rustc_hir::def_id::LOCAL_CRATE;
74 Box::new(tcx.crate_name(LOCAL_CRATE) as Symbol)
79 ongoing_codegen: Box<dyn Any>,
81 _dep_graph: &DepGraph,
82 ) -> Result<Box<dyn Any>, ErrorReported> {
83 let crate_name = ongoing_codegen
85 .expect("in join_codegen: ongoing_codegen is not a Symbol");
92 codegen_results: Box<dyn Any>,
93 outputs: &OutputFilenames,
94 ) -> Result<(), ErrorReported> {
95 use rustc_session::{config::CrateType, output::out_filename};
98 codegen_results.downcast::<Symbol>().expect("in link: codegen_results is not a Symbol");
99 for &crate_type in sess.opts.crate_types.iter() {
100 if crate_type != CrateType::Rlib {
101 sess.fatal(&format!("Crate type is {:?}", crate_type));
103 let output_name = out_filename(sess, crate_type, &outputs, &*crate_name.as_str());
104 let mut out_file = ::std::fs::File::create(output_name).unwrap();
105 write!(out_file, "This has been \"compiled\" successfully.").unwrap();
111 /// This is the entrypoint for a hot plugged rustc_codegen_llvm
113 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {