274 lines
9.4 KiB
Rust
274 lines
9.4 KiB
Rust
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use std::any::Any;
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use std::ffi::CString;
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use std::fs::File;
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use std::os::raw::{c_char, c_int};
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use rustc::middle::cstore::EncodedMetadata;
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use rustc::mir::mono::{Linkage as RLinkage, Visibility};
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use rustc::session::config::{DebugInfo, OutputType};
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use rustc_codegen_ssa::back::linker::LinkerInfo;
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use rustc_codegen_ssa::CrateInfo;
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use rustc_mir::monomorphize::partitioning::CodegenUnitExt;
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use cranelift_faerie::*;
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use crate::prelude::*;
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pub fn codegen_crate<'a, 'tcx>(
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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metadata: EncodedMetadata,
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_need_metadata_module: bool,
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) -> Box<dyn Any> {
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env_logger::init();
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if !tcx.sess.crate_types.get().contains(&CrateType::Executable)
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&& std::env::var("SHOULD_RUN").is_ok()
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{
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tcx.sess
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.err("Can't JIT run non executable (SHOULD_RUN env var is set)");
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}
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tcx.sess.abort_if_errors();
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let mut log = if cfg!(debug_assertions) {
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Some(File::create(concat!(env!("CARGO_MANIFEST_DIR"), "/target/out/log.txt")).unwrap())
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} else {
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None
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};
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if std::env::var("SHOULD_RUN").is_ok() {
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let mut jit_module: Module<SimpleJITBackend> =
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Module::new(SimpleJITBuilder::new(cranelift_module::default_libcall_names()));
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assert_eq!(pointer_ty(tcx), jit_module.target_config().pointer_type());
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let sig = Signature {
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params: vec![
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AbiParam::new(jit_module.target_config().pointer_type()),
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AbiParam::new(jit_module.target_config().pointer_type()),
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],
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returns: vec![AbiParam::new(
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jit_module.target_config().pointer_type(), /*isize*/
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)],
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call_conv: CallConv::SystemV,
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};
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let main_func_id = jit_module
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.declare_function("main", Linkage::Import, &sig)
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.unwrap();
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codegen_cgus(tcx, &mut jit_module, &mut None, &mut log);
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crate::allocator::codegen(tcx.sess, &mut jit_module);
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jit_module.finalize_definitions();
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tcx.sess.abort_if_errors();
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let finalized_main: *const u8 = jit_module.get_finalized_function(main_func_id);
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println!("Rustc codegen cranelift will JIT run the executable, because the SHOULD_RUN env var is set");
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let f: extern "C" fn(c_int, *const *const c_char) -> c_int =
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unsafe { ::std::mem::transmute(finalized_main) };
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let args = ::std::env::var("JIT_ARGS").unwrap_or_else(|_| String::new());
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let args = args
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.split(" ")
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.chain(Some(&*tcx.crate_name(LOCAL_CRATE).as_str().to_string()))
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.map(|arg| CString::new(arg).unwrap())
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.collect::<Vec<_>>();
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let argv = args.iter().map(|arg| arg.as_ptr()).collect::<Vec<_>>();
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// TODO: Rust doesn't care, but POSIX argv has a NULL sentinel at the end
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let ret = f(args.len() as c_int, argv.as_ptr());
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jit_module.finish();
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std::process::exit(ret);
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} else {
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let new_module = |name: String| {
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let module: Module<FaerieBackend> = Module::new(
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FaerieBuilder::new(
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crate::build_isa(tcx.sess),
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name + ".o",
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FaerieTrapCollection::Disabled,
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cranelift_module::default_libcall_names(),
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)
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.unwrap(),
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);
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assert_eq!(pointer_ty(tcx), module.target_config().pointer_type());
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module
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};
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let emit_module = |name: &str,
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kind: ModuleKind,
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mut module: Module<FaerieBackend>,
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debug: Option<DebugContext>| {
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module.finalize_definitions();
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let mut artifact = module.finish().artifact;
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if let Some(mut debug) = debug {
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debug.emit(&mut artifact);
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}
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let tmp_file = tcx
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.output_filenames(LOCAL_CRATE)
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.temp_path(OutputType::Object, Some(name));
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let obj = artifact.emit().unwrap();
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std::fs::write(&tmp_file, obj).unwrap();
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CompiledModule {
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name: name.to_string(),
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kind,
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object: Some(tmp_file),
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bytecode: None,
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bytecode_compressed: None,
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}
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};
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let mut faerie_module = new_module("some_file".to_string());
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let mut debug = if tcx.sess.opts.debuginfo != DebugInfo::None
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// macOS debuginfo doesn't work yet (see #303)
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&& !tcx.sess.target.target.options.is_like_osx
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{
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let debug = DebugContext::new(
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tcx,
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faerie_module.target_config().pointer_type().bytes() as u8,
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);
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Some(debug)
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} else {
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None
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};
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codegen_cgus(tcx, &mut faerie_module, &mut debug, &mut log);
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tcx.sess.abort_if_errors();
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let mut allocator_module = new_module("allocator_shim.o".to_string());
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let created_alloc_shim = crate::allocator::codegen(tcx.sess, &mut allocator_module);
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rustc_incremental::assert_dep_graph(tcx);
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rustc_incremental::save_dep_graph(tcx);
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rustc_incremental::finalize_session_directory(tcx.sess, tcx.crate_hash(LOCAL_CRATE));
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Box::new(CodegenResults {
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crate_name: tcx.crate_name(LOCAL_CRATE),
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modules: vec![emit_module(
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"dummy_name",
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ModuleKind::Regular,
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faerie_module,
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debug,
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)],
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allocator_module: if created_alloc_shim {
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Some(emit_module(
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"allocator_shim",
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ModuleKind::Allocator,
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allocator_module,
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None,
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))
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} else {
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None
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},
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metadata_module: Some(CompiledModule {
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name: "dummy_metadata".to_string(),
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kind: ModuleKind::Metadata,
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object: None,
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bytecode: None,
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bytecode_compressed: None,
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}),
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crate_hash: tcx.crate_hash(LOCAL_CRATE),
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metadata,
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windows_subsystem: None, // Windows is not yet supported
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linker_info: LinkerInfo::new(tcx),
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crate_info: CrateInfo::new(tcx),
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})
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}
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}
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fn codegen_cgus<'a, 'tcx: 'a>(
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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module: &mut Module<impl Backend + 'static>,
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debug: &mut Option<DebugContext<'tcx>>,
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log: &mut Option<File>,
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) {
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let (_, cgus) = tcx.collect_and_partition_mono_items(LOCAL_CRATE);
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let mono_items = cgus
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.iter()
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.map(|cgu| cgu.items_in_deterministic_order(tcx).into_iter())
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.flatten()
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.collect::<FxHashMap<_, (_, _)>>();
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codegen_mono_items(tcx, module, debug.as_mut(), log, mono_items);
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crate::main_shim::maybe_create_entry_wrapper(tcx, module);
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}
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fn codegen_mono_items<'a, 'tcx: 'a>(
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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module: &mut Module<impl Backend + 'static>,
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debug_context: Option<&mut DebugContext<'tcx>>,
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log: &mut Option<File>,
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mono_items: FxHashMap<MonoItem<'tcx>, (RLinkage, Visibility)>,
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) {
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let mut cx = CodegenCx::new(tcx, module, debug_context);
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time("codegen mono items", move || {
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for (mono_item, (linkage, visibility)) in mono_items {
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crate::unimpl::try_unimpl(tcx, log, || {
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let linkage = crate::linkage::get_clif_linkage(mono_item, linkage, visibility);
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trans_mono_item(&mut cx, mono_item, linkage);
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});
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}
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cx.finalize();
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});
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}
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fn trans_mono_item<'a, 'clif, 'tcx: 'a, B: Backend + 'static>(
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cx: &mut crate::CodegenCx<'a, 'clif, 'tcx, B>,
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mono_item: MonoItem<'tcx>,
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linkage: Linkage,
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) {
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let tcx = cx.tcx;
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match mono_item {
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MonoItem::Fn(inst) => {
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let _inst_guard =
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PrintOnPanic(|| format!("{:?} {}", inst, tcx.symbol_name(inst).as_str()));
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debug_assert!(!inst.substs.needs_infer());
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let _mir_guard = PrintOnPanic(|| {
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match inst.def {
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InstanceDef::Item(_)
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| InstanceDef::DropGlue(_, _)
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| InstanceDef::Virtual(_, _)
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if inst.def_id().krate == LOCAL_CRATE =>
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{
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let mut mir = ::std::io::Cursor::new(Vec::new());
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crate::rustc_mir::util::write_mir_pretty(
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tcx,
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Some(inst.def_id()),
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&mut mir,
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)
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.unwrap();
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String::from_utf8(mir.into_inner()).unwrap()
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}
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_ => {
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// FIXME fix write_mir_pretty for these instances
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format!("{:#?}", tcx.instance_mir(inst.def))
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}
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}
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});
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crate::base::trans_fn(cx, inst, linkage);
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}
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MonoItem::Static(def_id) => {
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crate::constant::codegen_static(&mut cx.ccx, def_id);
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}
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MonoItem::GlobalAsm(node_id) => tcx
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.sess
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.fatal(&format!("Unimplemented global asm mono item {:?}", node_id)),
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}
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}
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fn time<R>(name: &str, f: impl FnOnce() -> R) -> R {
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println!("[{}] start", name);
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let before = std::time::Instant::now();
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let res = f();
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let after = std::time::Instant::now();
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println!("[{}] end time: {:?}", name, after - before);
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res
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}
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