1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! The Rust compiler.
15 //! This API is completely unstable and subject to change.
17 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
18 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
19 html_root_url = "https://doc.rust-lang.org/nightly/")]
21 #![feature(box_patterns)]
22 #![feature(box_syntax)]
23 #![feature(crate_visibility_modifier)]
24 #![feature(custom_attribute)]
25 #![feature(extern_types)]
26 #![feature(in_band_lifetimes)]
27 #![allow(unused_attributes)]
31 #![feature(range_contains)]
32 #![feature(rustc_diagnostic_macros)]
33 #![feature(slice_sort_by_cached_key)]
34 #![feature(optin_builtin_traits)]
35 #![feature(concat_idents)]
36 #![feature(link_args)]
37 #![feature(static_nobundle)]
39 use back::write::create_target_machine;
40 use rustc::dep_graph::WorkProduct;
41 use syntax_pos::symbol::Symbol;
43 #[macro_use] extern crate bitflags;
46 #[macro_use] extern crate rustc;
47 extern crate jobserver;
48 extern crate num_cpus;
49 extern crate rustc_mir;
50 extern crate rustc_allocator;
51 extern crate rustc_apfloat;
52 extern crate rustc_target;
53 #[macro_use] extern crate rustc_data_structures;
54 extern crate rustc_demangle;
55 extern crate rustc_incremental;
56 extern crate rustc_llvm;
57 extern crate rustc_platform_intrinsics as intrinsics;
58 extern crate rustc_codegen_utils;
59 extern crate rustc_fs_util;
61 #[macro_use] extern crate log;
62 #[macro_use] extern crate syntax;
63 extern crate syntax_pos;
64 extern crate rustc_errors as errors;
65 extern crate serialize;
66 extern crate cc; // Used to locate MSVC
67 extern crate tempfile;
70 use back::bytecode::RLIB_BYTECODE_EXTENSION;
72 use time_graph::TimeGraph;
73 use std::sync::mpsc::Receiver;
74 use back::write::{self, OngoingCodegen};
75 use context::CodegenCx;
76 use monomorphize::partitioning::CodegenUnit;
78 pub use llvm_util::target_features;
82 use rustc_data_structures::sync::Lrc;
84 use rustc::dep_graph::DepGraph;
85 use rustc::hir::def_id::CrateNum;
86 use rustc::middle::allocator::AllocatorKind;
87 use rustc::middle::cstore::{EncodedMetadata, MetadataLoader};
88 use rustc::middle::cstore::{NativeLibrary, CrateSource, LibSource};
89 use rustc::middle::lang_items::LangItem;
90 use rustc::session::{Session, CompileIncomplete};
91 use rustc::session::config::{OutputFilenames, OutputType, PrintRequest};
92 use rustc::ty::{self, TyCtxt};
93 use rustc::util::time_graph;
94 use rustc::util::nodemap::{FxHashSet, FxHashMap};
95 use rustc::util::profiling::ProfileCategory;
96 use rustc_mir::monomorphize;
97 use rustc_codegen_utils::{CompiledModule, ModuleKind};
98 use rustc_codegen_utils::codegen_backend::CodegenBackend;
99 use rustc_data_structures::svh::Svh;
130 // The following is a work around that replaces `pub mod llvm;` and that fixes issue 53912.
131 #[path = "llvm/mod.rs"] mod llvm_; pub mod llvm { pub use super::llvm_::*; }
142 pub struct LlvmCodegenBackend(());
144 impl BackendMethods for LlvmCodegenBackend {
145 type Module = ModuleLlvm;
146 type OngoingCodegen = OngoingCodegen;
148 fn new_metadata(&self, sess: &Session, mod_name: &str) -> ModuleLlvm {
149 ModuleLlvm::new(sess, mod_name)
151 fn write_metadata<'b, 'gcx>(
153 tcx: TyCtxt<'b, 'gcx, 'gcx>,
154 metadata: &ModuleLlvm
155 ) -> EncodedMetadata {
156 base::write_metadata(tcx, metadata)
158 fn start_async_codegen(
161 time_graph: Option<TimeGraph>,
162 metadata: EncodedMetadata,
163 coordinator_receive: Receiver<Box<dyn Any + Send>>,
165 ) -> OngoingCodegen {
166 write::start_async_codegen(tcx, time_graph, metadata, coordinator_receive, total_cgus)
168 fn submit_pre_codegened_module_to_llvm(
170 codegen: &OngoingCodegen,
172 module: ModuleCodegen<ModuleLlvm>
174 codegen.submit_pre_codegened_module_to_llvm(tcx, module)
176 fn codegen_aborted(codegen: OngoingCodegen) {
177 codegen.codegen_aborted();
179 fn codegen_finished(&self, codegen: &OngoingCodegen, tcx: TyCtxt) {
180 codegen.codegen_finished(tcx)
182 fn check_for_errors(&self, codegen: &OngoingCodegen, sess: &Session) {
183 codegen.check_for_errors(sess)
185 fn codegen_allocator(&self, tcx: TyCtxt, mods: &ModuleLlvm, kind: AllocatorKind) {
186 unsafe { allocator::codegen(tcx, mods, kind) }
188 fn wait_for_signal_to_codegen_item(&self, codegen: &OngoingCodegen) {
189 codegen.wait_for_signal_to_codegen_item()
193 impl<'a, 'tcx: 'a> BackendCodegenCxMethods<'a, 'tcx> for LlvmCodegenBackend {
194 type CodegenCx = CodegenCx<'a, 'tcx>;
196 fn new_codegen_context(
198 tcx: TyCtxt<'a, 'tcx, 'tcx>,
199 codegen_unit: Arc<CodegenUnit<'tcx>>,
200 llvm_module: &'a ModuleLlvm
201 ) -> CodegenCx<'a, 'tcx> {
202 CodegenCx::new(tcx, codegen_unit, llvm_module)
207 impl !Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
208 impl !Sync for LlvmCodegenBackend {}
210 impl LlvmCodegenBackend {
211 pub fn new() -> Box<dyn CodegenBackend> {
212 box LlvmCodegenBackend(())
216 impl CodegenBackend for LlvmCodegenBackend {
217 fn init(&self, sess: &Session) {
218 llvm_util::init(sess); // Make sure llvm is inited
221 fn print(&self, req: PrintRequest, sess: &Session) {
223 PrintRequest::RelocationModels => {
224 println!("Available relocation models:");
225 for &(name, _) in back::write::RELOC_MODEL_ARGS.iter() {
226 println!(" {}", name);
230 PrintRequest::CodeModels => {
231 println!("Available code models:");
232 for &(name, _) in back::write::CODE_GEN_MODEL_ARGS.iter(){
233 println!(" {}", name);
237 PrintRequest::TlsModels => {
238 println!("Available TLS models:");
239 for &(name, _) in back::write::TLS_MODEL_ARGS.iter(){
240 println!(" {}", name);
244 req => llvm_util::print(req, sess),
248 fn print_passes(&self) {
249 llvm_util::print_passes();
252 fn print_version(&self) {
253 llvm_util::print_version();
256 fn diagnostics(&self) -> &[(&'static str, &'static str)] {
260 fn target_features(&self, sess: &Session) -> Vec<Symbol> {
261 target_features(sess)
264 fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
265 box metadata::LlvmMetadataLoader
268 fn provide(&self, providers: &mut ty::query::Providers) {
269 rustc_codegen_utils::symbol_export::provide(providers);
270 rustc_codegen_utils::symbol_names::provide(providers);
271 base::provide_both(providers);
272 attributes::provide(providers);
275 fn provide_extern(&self, providers: &mut ty::query::Providers) {
276 rustc_codegen_utils::symbol_export::provide_extern(providers);
277 base::provide_both(providers);
278 attributes::provide_extern(providers);
281 fn codegen_crate<'a, 'tcx>(
283 tcx: TyCtxt<'a, 'tcx, 'tcx>,
284 rx: mpsc::Receiver<Box<dyn Any + Send>>
286 box base::codegen_crate(LlvmCodegenBackend(()), tcx, rx)
289 fn join_codegen_and_link(
291 ongoing_codegen: Box<dyn Any>,
293 dep_graph: &DepGraph,
294 outputs: &OutputFilenames,
295 ) -> Result<(), CompileIncomplete>{
296 use rustc::util::common::time;
297 let (ongoing_codegen, work_products) =
298 ongoing_codegen.downcast::<::back::write::OngoingCodegen>()
299 .expect("Expected LlvmCodegenBackend's OngoingCodegen, found Box<Any>")
301 if sess.opts.debugging_opts.incremental_info {
302 back::write::dump_incremental_data(&ongoing_codegen);
306 "serialize work products",
307 move || rustc_incremental::save_work_product_index(sess, &dep_graph, work_products));
309 sess.compile_status()?;
311 if !sess.opts.output_types.keys().any(|&i| i == OutputType::Exe ||
312 i == OutputType::Metadata) {
316 // Run the linker on any artifacts that resulted from the LLVM run.
317 // This should produce either a finished executable or library.
318 sess.profiler(|p| p.start_activity(ProfileCategory::Linking));
319 time(sess, "linking", || {
320 back::link::link_binary(sess, &ongoing_codegen,
321 outputs, &ongoing_codegen.crate_name.as_str());
323 sess.profiler(|p| p.end_activity(ProfileCategory::Linking));
325 // Now that we won't touch anything in the incremental compilation directory
326 // any more, we can finalize it (which involves renaming it)
327 rustc_incremental::finalize_session_directory(sess, ongoing_codegen.crate_hash);
333 /// This is the entrypoint for a hot plugged rustc_codegen_llvm
335 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
336 LlvmCodegenBackend::new()
339 pub struct ModuleCodegen<M> {
340 /// The name of the module. When the crate may be saved between
341 /// compilations, incremental compilation requires that name be
342 /// unique amongst **all** crates. Therefore, it should contain
343 /// something unique to this crate (e.g., a module path) as well
344 /// as the crate name and disambiguator.
345 /// We currently generate these names via CodegenUnit::build_cgu_name().
351 struct CachedModuleCodegen {
356 impl ModuleCodegen<ModuleLlvm> {
357 fn into_compiled_module(self,
360 emit_bc_compressed: bool,
361 outputs: &OutputFilenames) -> CompiledModule {
362 let object = if emit_obj {
363 Some(outputs.temp_path(OutputType::Object, Some(&self.name)))
367 let bytecode = if emit_bc {
368 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name)))
372 let bytecode_compressed = if emit_bc_compressed {
373 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name))
374 .with_extension(RLIB_BYTECODE_EXTENSION))
380 name: self.name.clone(),
389 pub struct ModuleLlvm {
390 llcx: &'static mut llvm::Context,
391 llmod_raw: *const llvm::Module,
392 tm: &'static mut llvm::TargetMachine,
395 unsafe impl Send for ModuleLlvm { }
396 unsafe impl Sync for ModuleLlvm { }
399 fn new(sess: &Session, mod_name: &str) -> Self {
401 let llcx = llvm::LLVMRustContextCreate(sess.fewer_names());
402 let llmod_raw = context::create_module(sess, llcx, mod_name) as *const _;
407 tm: create_target_machine(sess, false),
412 fn llmod(&self) -> &llvm::Module {
419 impl Drop for ModuleLlvm {
422 llvm::LLVMContextDispose(&mut *(self.llcx as *mut _));
423 llvm::LLVMRustDisposeTargetMachine(&mut *(self.tm as *mut _));
428 struct CodegenResults {
430 modules: Vec<CompiledModule>,
431 allocator_module: Option<CompiledModule>,
432 metadata_module: CompiledModule,
434 metadata: rustc::middle::cstore::EncodedMetadata,
435 windows_subsystem: Option<String>,
436 linker_info: rustc_codegen_utils::linker::LinkerInfo,
437 crate_info: CrateInfo,
440 /// Misc info we load from metadata to persist beyond the tcx
442 panic_runtime: Option<CrateNum>,
443 compiler_builtins: Option<CrateNum>,
444 profiler_runtime: Option<CrateNum>,
445 sanitizer_runtime: Option<CrateNum>,
446 is_no_builtins: FxHashSet<CrateNum>,
447 native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
448 crate_name: FxHashMap<CrateNum, String>,
449 used_libraries: Lrc<Vec<NativeLibrary>>,
450 link_args: Lrc<Vec<String>>,
451 used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
452 used_crates_static: Vec<(CrateNum, LibSource)>,
453 used_crates_dynamic: Vec<(CrateNum, LibSource)>,
454 wasm_imports: FxHashMap<String, String>,
455 lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
456 missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
459 __build_diagnostic_array! { librustc_codegen_llvm, DIAGNOSTICS }