1 #![feature(rustc_private)]
4 extern crate rustc_codegen_utils;
6 extern crate rustc_data_structures;
7 extern crate rustc_hir;
8 extern crate rustc_target;
9 extern crate rustc_driver;
10 extern crate rustc_span;
15 use rustc_span::symbol::Symbol;
16 use rustc::session::Session;
17 use rustc::session::config::OutputFilenames;
18 use rustc::ty::TyCtxt;
19 use rustc::ty::query::Providers;
20 use rustc::middle::cstore::{EncodedMetadata, MetadataLoader, MetadataLoaderDyn};
21 use rustc::dep_graph::DepGraph;
22 use rustc::util::common::ErrorReported;
23 use rustc_codegen_utils::codegen_backend::CodegenBackend;
24 use rustc_data_structures::sync::MetadataRef;
25 use rustc_data_structures::owning_ref::OwningRef;
26 use rustc_target::spec::Target;
28 pub struct NoLlvmMetadataLoader;
30 impl MetadataLoader for NoLlvmMetadataLoader {
31 fn get_rlib_metadata(&self, _: &Target, filename: &Path) -> Result<MetadataRef, String> {
32 let buf = std::fs::read(filename).map_err(|e| format!("metadata file open err: {:?}", e))?;
33 let buf: OwningRef<Vec<u8>, [u8]> = OwningRef::new(buf);
34 Ok(rustc_erase_owner!(buf.map_owner_box()))
37 fn get_dylib_metadata(&self, target: &Target, filename: &Path) -> Result<MetadataRef, String> {
38 self.get_rlib_metadata(target, filename)
44 impl CodegenBackend for TheBackend {
45 fn metadata_loader(&self) -> Box<MetadataLoaderDyn> {
46 Box::new(NoLlvmMetadataLoader)
49 fn provide(&self, providers: &mut Providers) {
50 rustc_codegen_utils::symbol_names::provide(providers);
52 providers.target_features_whitelist = |tcx, _cnum| {
53 tcx.arena.alloc(Default::default()) // Just a dummy
55 providers.is_reachable_non_generic = |_tcx, _defid| true;
56 providers.exported_symbols = |_tcx, _crate| Arc::new(Vec::new());
59 fn provide_extern(&self, providers: &mut Providers) {
60 providers.is_reachable_non_generic = |_tcx, _defid| true;
63 fn codegen_crate<'a, 'tcx>(
66 _metadata: EncodedMetadata,
67 _need_metadata_module: bool,
69 use rustc_hir::def_id::LOCAL_CRATE;
71 Box::new(tcx.crate_name(LOCAL_CRATE) as Symbol)
76 ongoing_codegen: Box<dyn Any>,
78 _dep_graph: &DepGraph,
79 ) -> Result<Box<dyn Any>, ErrorReported> {
80 let crate_name = ongoing_codegen.downcast::<Symbol>()
81 .expect("in join_codegen: ongoing_codegen is not a Symbol");
88 codegen_results: Box<dyn Any>,
89 outputs: &OutputFilenames,
90 ) -> Result<(), ErrorReported> {
92 use rustc::session::config::CrateType;
93 use rustc_codegen_utils::link::out_filename;
94 let crate_name = codegen_results.downcast::<Symbol>()
95 .expect("in link: codegen_results is not a Symbol");
96 for &crate_type in sess.opts.crate_types.iter() {
97 if crate_type != CrateType::Rlib {
98 sess.fatal(&format!("Crate type is {:?}", crate_type));
101 out_filename(sess, crate_type, &outputs, &*crate_name.as_str());
102 let mut out_file = ::std::fs::File::create(output_name).unwrap();
103 write!(out_file, "This has been \"compiled\" successfully.").unwrap();
109 /// This is the entrypoint for a hot plugged rustc_codegen_llvm
111 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {