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#![feature(rustc_private)]
#![deny(warnings)]
extern crate rustc_codegen_ssa;
extern crate rustc_data_structures;
extern crate rustc_driver;
extern crate rustc_errors;
extern crate rustc_hir;
extern crate rustc_metadata;
extern crate rustc_middle;
extern crate rustc_session;
extern crate rustc_span;
extern crate rustc_symbol_mangling;
extern crate rustc_target;
use rustc_codegen_ssa::traits::CodegenBackend;
use rustc_codegen_ssa::{CodegenResults, CrateInfo};
use rustc_data_structures::fx::FxHashMap;
use rustc_errors::ErrorGuaranteed;
use rustc_metadata::EncodedMetadata;
use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
use rustc_middle::ty::TyCtxt;
use rustc_session::config::OutputFilenames;
use rustc_session::Session;
use std::any::Any;
struct TheBackend;
impl CodegenBackend for TheBackend {
fn locale_resource(&self) -> &'static str { "" }
fn codegen_crate<'a, 'tcx>(
&self,
tcx: TyCtxt<'tcx>,
metadata: EncodedMetadata,
_need_metadata_module: bool,
) -> Box<dyn Any> {
Box::new(CodegenResults {
modules: vec![],
allocator_module: None,
metadata_module: None,
metadata,
crate_info: CrateInfo::new(tcx, "fake_target_cpu".to_string()),
})
}
fn join_codegen(
&self,
ongoing_codegen: Box<dyn Any>,
_sess: &Session,
_outputs: &OutputFilenames,
) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorGuaranteed> {
let codegen_results = ongoing_codegen
.downcast::<CodegenResults>()
.expect("in join_codegen: ongoing_codegen is not a CodegenResults");
Ok((*codegen_results, FxHashMap::default()))
}
fn link(
&self,
sess: &Session,
codegen_results: CodegenResults,
outputs: &OutputFilenames,
) -> Result<(), ErrorGuaranteed> {
use rustc_session::{config::CrateType, output::out_filename};
use std::io::Write;
let crate_name = codegen_results.crate_info.local_crate_name;
for &crate_type in sess.opts.crate_types.iter() {
if crate_type != CrateType::Rlib {
sess.fatal(&format!("Crate type is {:?}", crate_type));
}
let output_name = out_filename(sess, crate_type, &outputs, crate_name);
let mut out_file = ::std::fs::File::create(output_name).unwrap();
write!(out_file, "This has been \"compiled\" successfully.").unwrap();
}
Ok(())
}
}
/// This is the entrypoint for a hot plugged rustc_codegen_llvm
#[no_mangle]
pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
Box::new(TheBackend)
}
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