mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-31 04:57:19 +00:00
1011 lines
37 KiB
Rust
1011 lines
37 KiB
Rust
use crate::errors;
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use crate::interface::{Compiler, Result};
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use crate::proc_macro_decls;
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use crate::util;
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use rustc_ast::{self as ast, visit};
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use rustc_borrowck as mir_borrowck;
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use rustc_codegen_ssa::traits::CodegenBackend;
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use rustc_data_structures::parallel;
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use rustc_data_structures::steal::Steal;
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use rustc_data_structures::sync::{Lrc, OnceCell, WorkerLocal};
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use rustc_errors::PResult;
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use rustc_expand::base::{ExtCtxt, LintStoreExpand};
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use rustc_feature::Features;
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use rustc_fs_util::try_canonicalize;
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use rustc_hir::def_id::{StableCrateId, LOCAL_CRATE};
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use rustc_lint::{unerased_lint_store, BufferedEarlyLint, EarlyCheckNode, LintStore};
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use rustc_metadata::creader::CStore;
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use rustc_middle::arena::Arena;
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use rustc_middle::dep_graph::DepGraph;
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use rustc_middle::query::{ExternProviders, Providers};
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use rustc_middle::ty::{self, GlobalCtxt, RegisteredTools, TyCtxt};
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use rustc_mir_build as mir_build;
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use rustc_parse::{parse_crate_from_file, parse_crate_from_source_str, validate_attr};
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use rustc_passes::{self, abi_test, hir_stats, layout_test};
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use rustc_plugin_impl as plugin;
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use rustc_resolve::Resolver;
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use rustc_session::code_stats::VTableSizeInfo;
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use rustc_session::config::{CrateType, Input, OutFileName, OutputFilenames, OutputType};
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use rustc_session::cstore::{MetadataLoader, Untracked};
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use rustc_session::output::filename_for_input;
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use rustc_session::search_paths::PathKind;
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use rustc_session::{Limit, Session};
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use rustc_span::symbol::{sym, Symbol};
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use rustc_span::FileName;
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use rustc_target::spec::PanicStrategy;
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use rustc_trait_selection::traits;
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use std::any::Any;
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use std::ffi::OsString;
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use std::io::{self, BufWriter, Write};
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use std::path::{Path, PathBuf};
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use std::sync::{Arc, LazyLock};
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use std::{env, fs, iter};
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pub fn parse<'a>(sess: &'a Session) -> PResult<'a, ast::Crate> {
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let krate = sess.time("parse_crate", || match &sess.io.input {
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Input::File(file) => parse_crate_from_file(file, &sess.parse_sess),
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Input::Str { input, name } => {
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parse_crate_from_source_str(name.clone(), input.clone(), &sess.parse_sess)
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}
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})?;
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if sess.opts.unstable_opts.input_stats {
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eprintln!("Lines of code: {}", sess.source_map().count_lines());
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eprintln!("Pre-expansion node count: {}", count_nodes(&krate));
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}
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if let Some(ref s) = sess.opts.unstable_opts.show_span {
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rustc_ast_passes::show_span::run(sess.diagnostic(), s, &krate);
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}
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if sess.opts.unstable_opts.hir_stats {
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hir_stats::print_ast_stats(&krate, "PRE EXPANSION AST STATS", "ast-stats-1");
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}
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Ok(krate)
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}
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fn count_nodes(krate: &ast::Crate) -> usize {
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let mut counter = rustc_ast_passes::node_count::NodeCounter::new();
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visit::walk_crate(&mut counter, krate);
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counter.count
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}
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pub(crate) fn create_lint_store(
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sess: &Session,
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metadata_loader: &dyn MetadataLoader,
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register_lints: Option<impl Fn(&Session, &mut LintStore)>,
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pre_configured_attrs: &[ast::Attribute],
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) -> LintStore {
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let mut lint_store = rustc_lint::new_lint_store(sess.enable_internal_lints());
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if let Some(register_lints) = register_lints {
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register_lints(sess, &mut lint_store);
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}
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let registrars = sess.time("plugin_loading", || {
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plugin::load::load_plugins(sess, metadata_loader, pre_configured_attrs)
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});
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sess.time("plugin_registration", || {
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let mut registry = plugin::Registry { lint_store: &mut lint_store };
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for registrar in registrars {
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registrar(&mut registry);
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}
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});
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lint_store
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}
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fn pre_expansion_lint<'a>(
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sess: &Session,
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features: &Features,
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lint_store: &LintStore,
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registered_tools: &RegisteredTools,
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check_node: impl EarlyCheckNode<'a>,
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node_name: Symbol,
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) {
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sess.prof.generic_activity_with_arg("pre_AST_expansion_lint_checks", node_name.as_str()).run(
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|| {
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rustc_lint::check_ast_node(
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sess,
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features,
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true,
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lint_store,
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registered_tools,
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None,
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rustc_lint::BuiltinCombinedPreExpansionLintPass::new(),
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check_node,
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);
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},
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);
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}
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// Cannot implement directly for `LintStore` due to trait coherence.
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struct LintStoreExpandImpl<'a>(&'a LintStore);
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impl LintStoreExpand for LintStoreExpandImpl<'_> {
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fn pre_expansion_lint(
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&self,
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sess: &Session,
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features: &Features,
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registered_tools: &RegisteredTools,
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node_id: ast::NodeId,
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attrs: &[ast::Attribute],
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items: &[rustc_ast::ptr::P<ast::Item>],
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name: Symbol,
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) {
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pre_expansion_lint(sess, features, self.0, registered_tools, (node_id, attrs, items), name);
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}
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}
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/// Runs the "early phases" of the compiler: initial `cfg` processing, loading compiler plugins,
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/// syntax expansion, secondary `cfg` expansion, synthesis of a test
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/// harness if one is to be provided, injection of a dependency on the
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/// standard library and prelude, and name resolution.
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#[instrument(level = "trace", skip(krate, resolver))]
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fn configure_and_expand(
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mut krate: ast::Crate,
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pre_configured_attrs: &[ast::Attribute],
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resolver: &mut Resolver<'_, '_>,
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) -> ast::Crate {
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let tcx = resolver.tcx();
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let sess = tcx.sess;
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let features = tcx.features();
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let lint_store = unerased_lint_store(tcx);
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let crate_name = tcx.crate_name(LOCAL_CRATE);
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let lint_check_node = (&krate, pre_configured_attrs);
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pre_expansion_lint(
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sess,
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features,
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lint_store,
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tcx.registered_tools(()),
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lint_check_node,
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crate_name,
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);
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rustc_builtin_macros::register_builtin_macros(resolver);
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let num_standard_library_imports = sess.time("crate_injection", || {
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rustc_builtin_macros::standard_library_imports::inject(
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&mut krate,
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pre_configured_attrs,
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resolver,
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sess,
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features,
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)
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});
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util::check_attr_crate_type(sess, pre_configured_attrs, &mut resolver.lint_buffer());
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// Expand all macros
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krate = sess.time("macro_expand_crate", || {
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// Windows dlls do not have rpaths, so they don't know how to find their
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// dependencies. It's up to us to tell the system where to find all the
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// dependent dlls. Note that this uses cfg!(windows) as opposed to
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// targ_cfg because syntax extensions are always loaded for the host
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// compiler, not for the target.
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//
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// This is somewhat of an inherently racy operation, however, as
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// multiple threads calling this function could possibly continue
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// extending PATH far beyond what it should. To solve this for now we
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// just don't add any new elements to PATH which are already there
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// within PATH. This is basically a targeted fix at #17360 for rustdoc
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// which runs rustc in parallel but has been seen (#33844) to cause
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// problems with PATH becoming too long.
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let mut old_path = OsString::new();
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if cfg!(windows) {
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old_path = env::var_os("PATH").unwrap_or(old_path);
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let mut new_path = sess.host_filesearch(PathKind::All).search_path_dirs();
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for path in env::split_paths(&old_path) {
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if !new_path.contains(&path) {
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new_path.push(path);
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}
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}
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env::set_var(
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"PATH",
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&env::join_paths(
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new_path.iter().filter(|p| env::join_paths(iter::once(p)).is_ok()),
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)
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.unwrap(),
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);
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}
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// Create the config for macro expansion
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let recursion_limit = get_recursion_limit(pre_configured_attrs, sess);
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let cfg = rustc_expand::expand::ExpansionConfig {
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crate_name: crate_name.to_string(),
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features,
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recursion_limit,
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trace_mac: sess.opts.unstable_opts.trace_macros,
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should_test: sess.is_test_crate(),
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span_debug: sess.opts.unstable_opts.span_debug,
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proc_macro_backtrace: sess.opts.unstable_opts.proc_macro_backtrace,
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};
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let lint_store = LintStoreExpandImpl(lint_store);
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let mut ecx = ExtCtxt::new(sess, cfg, resolver, Some(&lint_store));
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ecx.num_standard_library_imports = num_standard_library_imports;
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// Expand macros now!
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let krate = sess.time("expand_crate", || ecx.monotonic_expander().expand_crate(krate));
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// The rest is error reporting
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sess.parse_sess.buffered_lints.with_lock(|buffered_lints: &mut Vec<BufferedEarlyLint>| {
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buffered_lints.append(&mut ecx.buffered_early_lint);
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});
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sess.time("check_unused_macros", || {
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ecx.check_unused_macros();
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});
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// If we hit a recursion limit, exit early to avoid later passes getting overwhelmed
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// with a large AST
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if ecx.reduced_recursion_limit.is_some() {
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sess.abort_if_errors();
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unreachable!();
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}
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if cfg!(windows) {
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env::set_var("PATH", &old_path);
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}
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krate
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});
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sess.time("maybe_building_test_harness", || {
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rustc_builtin_macros::test_harness::inject(&mut krate, sess, features, resolver)
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});
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let has_proc_macro_decls = sess.time("AST_validation", || {
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rustc_ast_passes::ast_validation::check_crate(
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sess,
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features,
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&krate,
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resolver.lint_buffer(),
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)
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});
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let crate_types = tcx.crate_types();
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let is_executable_crate = crate_types.contains(&CrateType::Executable);
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let is_proc_macro_crate = crate_types.contains(&CrateType::ProcMacro);
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if crate_types.len() > 1 {
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if is_executable_crate {
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sess.emit_err(errors::MixedBinCrate);
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}
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if is_proc_macro_crate {
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sess.emit_err(errors::MixedProcMacroCrate);
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}
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}
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if is_proc_macro_crate && sess.panic_strategy() == PanicStrategy::Abort {
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sess.emit_warning(errors::ProcMacroCratePanicAbort);
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}
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sess.time("maybe_create_a_macro_crate", || {
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let is_test_crate = sess.is_test_crate();
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rustc_builtin_macros::proc_macro_harness::inject(
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&mut krate,
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sess,
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features,
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resolver,
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is_proc_macro_crate,
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has_proc_macro_decls,
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is_test_crate,
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sess.diagnostic(),
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)
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});
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// Done with macro expansion!
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resolver.resolve_crate(&krate);
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krate
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}
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fn early_lint_checks(tcx: TyCtxt<'_>, (): ()) {
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let sess = tcx.sess;
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let (resolver, krate) = &*tcx.resolver_for_lowering(()).borrow();
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let mut lint_buffer = resolver.lint_buffer.steal();
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if sess.opts.unstable_opts.input_stats {
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eprintln!("Post-expansion node count: {}", count_nodes(&krate));
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}
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if sess.opts.unstable_opts.hir_stats {
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hir_stats::print_ast_stats(&krate, "POST EXPANSION AST STATS", "ast-stats-2");
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}
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// Needs to go *after* expansion to be able to check the results of macro expansion.
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sess.time("complete_gated_feature_checking", || {
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rustc_ast_passes::feature_gate::check_crate(&krate, sess, tcx.features());
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});
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// Add all buffered lints from the `ParseSess` to the `Session`.
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sess.parse_sess.buffered_lints.with_lock(|buffered_lints| {
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info!("{} parse sess buffered_lints", buffered_lints.len());
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for early_lint in buffered_lints.drain(..) {
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lint_buffer.add_early_lint(early_lint);
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}
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});
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// Gate identifiers containing invalid Unicode codepoints that were recovered during lexing.
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sess.parse_sess.bad_unicode_identifiers.with_lock(|identifiers| {
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let mut identifiers: Vec<_> = identifiers.drain().collect();
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identifiers.sort_by_key(|&(key, _)| key);
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for (ident, mut spans) in identifiers.into_iter() {
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spans.sort();
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if ident == sym::ferris {
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let first_span = spans[0];
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sess.emit_err(errors::FerrisIdentifier { spans, first_span });
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} else {
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sess.emit_err(errors::EmojiIdentifier { spans, ident });
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}
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}
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});
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let lint_store = unerased_lint_store(tcx);
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rustc_lint::check_ast_node(
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sess,
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tcx.features(),
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false,
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lint_store,
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tcx.registered_tools(()),
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Some(lint_buffer),
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rustc_lint::BuiltinCombinedEarlyLintPass::new(),
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(&**krate, &*krate.attrs),
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)
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}
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// Returns all the paths that correspond to generated files.
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fn generated_output_paths(
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tcx: TyCtxt<'_>,
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outputs: &OutputFilenames,
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exact_name: bool,
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crate_name: Symbol,
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) -> Vec<PathBuf> {
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let sess = tcx.sess;
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let mut out_filenames = Vec::new();
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for output_type in sess.opts.output_types.keys() {
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let out_filename = outputs.path(*output_type);
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let file = out_filename.as_path().to_path_buf();
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match *output_type {
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// If the filename has been overridden using `-o`, it will not be modified
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// by appending `.rlib`, `.exe`, etc., so we can skip this transformation.
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OutputType::Exe if !exact_name => {
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for crate_type in tcx.crate_types().iter() {
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let p = filename_for_input(sess, *crate_type, crate_name, outputs);
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out_filenames.push(p.as_path().to_path_buf());
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}
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}
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OutputType::DepInfo if sess.opts.unstable_opts.dep_info_omit_d_target => {
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// Don't add the dep-info output when omitting it from dep-info targets
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}
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OutputType::DepInfo if out_filename.is_stdout() => {
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// Don't add the dep-info output when it goes to stdout
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}
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_ => {
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out_filenames.push(file);
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}
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}
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}
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out_filenames
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}
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// Runs `f` on every output file path and returns the first non-None result, or None if `f`
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// returns None for every file path.
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fn check_output<F, T>(output_paths: &[PathBuf], f: F) -> Option<T>
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where
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F: Fn(&PathBuf) -> Option<T>,
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{
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for output_path in output_paths {
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if let Some(result) = f(output_path) {
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return Some(result);
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}
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}
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None
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}
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|
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fn output_contains_path(output_paths: &[PathBuf], input_path: &Path) -> bool {
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let input_path = try_canonicalize(input_path).ok();
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if input_path.is_none() {
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return false;
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}
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let check = |output_path: &PathBuf| {
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if try_canonicalize(output_path).ok() == input_path { Some(()) } else { None }
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};
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check_output(output_paths, check).is_some()
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}
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|
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fn output_conflicts_with_dir(output_paths: &[PathBuf]) -> Option<PathBuf> {
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let check = |output_path: &PathBuf| output_path.is_dir().then(|| output_path.clone());
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check_output(output_paths, check)
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}
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|
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fn escape_dep_filename(filename: &str) -> String {
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// Apparently clang and gcc *only* escape spaces:
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// https://llvm.org/klaus/clang/commit/9d50634cfc268ecc9a7250226dd5ca0e945240d4
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filename.replace(' ', "\\ ")
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}
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|
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// Makefile comments only need escaping newlines and `\`.
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|
// The result can be unescaped by anything that can unescape `escape_default` and friends.
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fn escape_dep_env(symbol: Symbol) -> String {
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let s = symbol.as_str();
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let mut escaped = String::with_capacity(s.len());
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for c in s.chars() {
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match c {
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'\n' => escaped.push_str(r"\n"),
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'\r' => escaped.push_str(r"\r"),
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'\\' => escaped.push_str(r"\\"),
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_ => escaped.push(c),
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}
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}
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escaped
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}
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|
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fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[PathBuf]) {
|
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// Write out dependency rules to the dep-info file if requested
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let sess = tcx.sess;
|
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if !sess.opts.output_types.contains_key(&OutputType::DepInfo) {
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return;
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}
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let deps_output = outputs.path(OutputType::DepInfo);
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let deps_filename = deps_output.as_path();
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|
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let result: io::Result<()> = try {
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// Build a list of files used to compile the output and
|
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// write Makefile-compatible dependency rules
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let mut files: Vec<String> = sess
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.source_map()
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.files()
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.iter()
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.filter(|fmap| fmap.is_real_file())
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.filter(|fmap| !fmap.is_imported())
|
|
.map(|fmap| escape_dep_filename(&fmap.name.prefer_local().to_string()))
|
|
.collect();
|
|
|
|
// Account for explicitly marked-to-track files
|
|
// (e.g. accessed in proc macros).
|
|
let file_depinfo = sess.parse_sess.file_depinfo.borrow();
|
|
|
|
let normalize_path = |path: PathBuf| {
|
|
let file = FileName::from(path);
|
|
escape_dep_filename(&file.prefer_local().to_string())
|
|
};
|
|
|
|
let extra_tracked_files =
|
|
file_depinfo.iter().map(|path_sym| normalize_path(PathBuf::from(path_sym.as_str())));
|
|
files.extend(extra_tracked_files);
|
|
|
|
// We also need to track used PGO profile files
|
|
if let Some(ref profile_instr) = sess.opts.cg.profile_use {
|
|
files.push(normalize_path(profile_instr.as_path().to_path_buf()));
|
|
}
|
|
if let Some(ref profile_sample) = sess.opts.unstable_opts.profile_sample_use {
|
|
files.push(normalize_path(profile_sample.as_path().to_path_buf()));
|
|
}
|
|
|
|
// Debugger visualizer files
|
|
for debugger_visualizer in tcx.debugger_visualizers(LOCAL_CRATE) {
|
|
files.push(normalize_path(debugger_visualizer.path.clone().unwrap()));
|
|
}
|
|
|
|
if sess.binary_dep_depinfo() {
|
|
if let Some(ref backend) = sess.opts.unstable_opts.codegen_backend {
|
|
if backend.contains('.') {
|
|
// If the backend name contain a `.`, it is the path to an external dynamic
|
|
// library. If not, it is not a path.
|
|
files.push(backend.to_string());
|
|
}
|
|
}
|
|
|
|
for &cnum in tcx.crates(()) {
|
|
let source = tcx.used_crate_source(cnum);
|
|
if let Some((path, _)) = &source.dylib {
|
|
files.push(escape_dep_filename(&path.display().to_string()));
|
|
}
|
|
if let Some((path, _)) = &source.rlib {
|
|
files.push(escape_dep_filename(&path.display().to_string()));
|
|
}
|
|
if let Some((path, _)) = &source.rmeta {
|
|
files.push(escape_dep_filename(&path.display().to_string()));
|
|
}
|
|
}
|
|
}
|
|
|
|
let write_deps_to_file = |file: &mut dyn Write| -> io::Result<()> {
|
|
for path in out_filenames {
|
|
writeln!(file, "{}: {}\n", path.display(), files.join(" "))?;
|
|
}
|
|
|
|
// Emit a fake target for each input file to the compilation. This
|
|
// prevents `make` from spitting out an error if a file is later
|
|
// deleted. For more info see #28735
|
|
for path in files {
|
|
writeln!(file, "{path}:")?;
|
|
}
|
|
|
|
// Emit special comments with information about accessed environment variables.
|
|
let env_depinfo = sess.parse_sess.env_depinfo.borrow();
|
|
if !env_depinfo.is_empty() {
|
|
let mut envs: Vec<_> = env_depinfo
|
|
.iter()
|
|
.map(|(k, v)| (escape_dep_env(*k), v.map(escape_dep_env)))
|
|
.collect();
|
|
envs.sort_unstable();
|
|
writeln!(file)?;
|
|
for (k, v) in envs {
|
|
write!(file, "# env-dep:{k}")?;
|
|
if let Some(v) = v {
|
|
write!(file, "={v}")?;
|
|
}
|
|
writeln!(file)?;
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
};
|
|
|
|
match deps_output {
|
|
OutFileName::Stdout => {
|
|
let mut file = BufWriter::new(io::stdout());
|
|
write_deps_to_file(&mut file)?;
|
|
}
|
|
OutFileName::Real(ref path) => {
|
|
let mut file = BufWriter::new(fs::File::create(path)?);
|
|
write_deps_to_file(&mut file)?;
|
|
}
|
|
}
|
|
};
|
|
|
|
match result {
|
|
Ok(_) => {
|
|
if sess.opts.json_artifact_notifications {
|
|
sess.parse_sess
|
|
.span_diagnostic
|
|
.emit_artifact_notification(&deps_filename, "dep-info");
|
|
}
|
|
}
|
|
Err(error) => {
|
|
sess.emit_fatal(errors::ErrorWritingDependencies { path: &deps_filename, error });
|
|
}
|
|
}
|
|
}
|
|
|
|
fn resolver_for_lowering<'tcx>(
|
|
tcx: TyCtxt<'tcx>,
|
|
(): (),
|
|
) -> &'tcx Steal<(ty::ResolverAstLowering, Lrc<ast::Crate>)> {
|
|
let arenas = Resolver::arenas();
|
|
let _ = tcx.registered_tools(()); // Uses `crate_for_resolver`.
|
|
let (krate, pre_configured_attrs) = tcx.crate_for_resolver(()).steal();
|
|
let mut resolver = Resolver::new(tcx, &pre_configured_attrs, krate.spans.inner_span, &arenas);
|
|
let krate = configure_and_expand(krate, &pre_configured_attrs, &mut resolver);
|
|
|
|
// Make sure we don't mutate the cstore from here on.
|
|
tcx.untracked().cstore.leak();
|
|
|
|
let ty::ResolverOutputs {
|
|
global_ctxt: untracked_resolutions,
|
|
ast_lowering: untracked_resolver_for_lowering,
|
|
} = resolver.into_outputs();
|
|
|
|
let feed = tcx.feed_unit_query();
|
|
feed.resolutions(tcx.arena.alloc(untracked_resolutions));
|
|
tcx.arena.alloc(Steal::new((untracked_resolver_for_lowering, Lrc::new(krate))))
|
|
}
|
|
|
|
fn output_filenames(tcx: TyCtxt<'_>, (): ()) -> Arc<OutputFilenames> {
|
|
let sess = tcx.sess;
|
|
let _timer = sess.timer("prepare_outputs");
|
|
let (_, krate) = &*tcx.resolver_for_lowering(()).borrow();
|
|
let crate_name = tcx.crate_name(LOCAL_CRATE);
|
|
|
|
// FIXME: rustdoc passes &[] instead of &krate.attrs here
|
|
let outputs = util::build_output_filenames(&krate.attrs, sess);
|
|
|
|
let output_paths =
|
|
generated_output_paths(tcx, &outputs, sess.io.output_file.is_some(), crate_name);
|
|
|
|
// Ensure the source file isn't accidentally overwritten during compilation.
|
|
if let Some(ref input_path) = sess.io.input.opt_path() {
|
|
if sess.opts.will_create_output_file() {
|
|
if output_contains_path(&output_paths, input_path) {
|
|
sess.emit_fatal(errors::InputFileWouldBeOverWritten { path: input_path });
|
|
}
|
|
if let Some(ref dir_path) = output_conflicts_with_dir(&output_paths) {
|
|
sess.emit_fatal(errors::GeneratedFileConflictsWithDirectory {
|
|
input_path,
|
|
dir_path,
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
if let Some(ref dir) = sess.io.temps_dir {
|
|
if fs::create_dir_all(dir).is_err() {
|
|
sess.emit_fatal(errors::TempsDirError);
|
|
}
|
|
}
|
|
|
|
write_out_deps(tcx, &outputs, &output_paths);
|
|
|
|
let only_dep_info = sess.opts.output_types.contains_key(&OutputType::DepInfo)
|
|
&& sess.opts.output_types.len() == 1;
|
|
|
|
if !only_dep_info {
|
|
if let Some(ref dir) = sess.io.output_dir {
|
|
if fs::create_dir_all(dir).is_err() {
|
|
sess.emit_fatal(errors::OutDirError);
|
|
}
|
|
}
|
|
}
|
|
|
|
outputs.into()
|
|
}
|
|
|
|
pub static DEFAULT_QUERY_PROVIDERS: LazyLock<Providers> = LazyLock::new(|| {
|
|
let providers = &mut Providers::default();
|
|
providers.analysis = analysis;
|
|
providers.hir_crate = rustc_ast_lowering::lower_to_hir;
|
|
providers.output_filenames = output_filenames;
|
|
providers.resolver_for_lowering = resolver_for_lowering;
|
|
providers.early_lint_checks = early_lint_checks;
|
|
proc_macro_decls::provide(providers);
|
|
rustc_const_eval::provide(providers);
|
|
rustc_middle::hir::provide(providers);
|
|
mir_borrowck::provide(providers);
|
|
mir_build::provide(providers);
|
|
rustc_mir_transform::provide(providers);
|
|
rustc_monomorphize::provide(providers);
|
|
rustc_privacy::provide(providers);
|
|
rustc_resolve::provide(providers);
|
|
rustc_hir_analysis::provide(providers);
|
|
rustc_hir_typeck::provide(providers);
|
|
ty::provide(providers);
|
|
traits::provide(providers);
|
|
rustc_passes::provide(providers);
|
|
rustc_traits::provide(providers);
|
|
rustc_ty_utils::provide(providers);
|
|
rustc_metadata::provide(providers);
|
|
rustc_lint::provide(providers);
|
|
rustc_symbol_mangling::provide(providers);
|
|
rustc_codegen_ssa::provide(providers);
|
|
*providers
|
|
});
|
|
|
|
pub static DEFAULT_EXTERN_QUERY_PROVIDERS: LazyLock<ExternProviders> = LazyLock::new(|| {
|
|
let mut extern_providers = ExternProviders::default();
|
|
rustc_metadata::provide_extern(&mut extern_providers);
|
|
rustc_codegen_ssa::provide_extern(&mut extern_providers);
|
|
extern_providers
|
|
});
|
|
|
|
pub fn create_global_ctxt<'tcx>(
|
|
compiler: &'tcx Compiler,
|
|
crate_types: Vec<CrateType>,
|
|
stable_crate_id: StableCrateId,
|
|
lint_store: Lrc<LintStore>,
|
|
dep_graph: DepGraph,
|
|
untracked: Untracked,
|
|
gcx_cell: &'tcx OnceCell<GlobalCtxt<'tcx>>,
|
|
arena: &'tcx WorkerLocal<Arena<'tcx>>,
|
|
hir_arena: &'tcx WorkerLocal<rustc_hir::Arena<'tcx>>,
|
|
) -> &'tcx GlobalCtxt<'tcx> {
|
|
// We're constructing the HIR here; we don't care what we will
|
|
// read, since we haven't even constructed the *input* to
|
|
// incr. comp. yet.
|
|
dep_graph.assert_ignored();
|
|
|
|
let sess = &compiler.session();
|
|
let query_result_on_disk_cache = rustc_incremental::load_query_result_cache(sess);
|
|
|
|
let codegen_backend = compiler.codegen_backend();
|
|
let mut local_providers = *DEFAULT_QUERY_PROVIDERS;
|
|
codegen_backend.provide(&mut local_providers);
|
|
|
|
let mut extern_providers = *DEFAULT_EXTERN_QUERY_PROVIDERS;
|
|
codegen_backend.provide_extern(&mut extern_providers);
|
|
|
|
if let Some(callback) = compiler.override_queries {
|
|
callback(sess, &mut local_providers, &mut extern_providers);
|
|
}
|
|
|
|
let incremental = dep_graph.is_fully_enabled();
|
|
|
|
sess.time("setup_global_ctxt", || {
|
|
gcx_cell.get_or_init(move || {
|
|
TyCtxt::create_global_ctxt(
|
|
sess,
|
|
crate_types,
|
|
stable_crate_id,
|
|
lint_store,
|
|
arena,
|
|
hir_arena,
|
|
untracked,
|
|
dep_graph,
|
|
rustc_query_impl::query_callbacks(arena),
|
|
rustc_query_impl::query_system(
|
|
local_providers,
|
|
extern_providers,
|
|
query_result_on_disk_cache,
|
|
incremental,
|
|
),
|
|
)
|
|
})
|
|
})
|
|
}
|
|
|
|
/// Runs the type-checking, region checking and other miscellaneous analysis
|
|
/// passes on the crate.
|
|
fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> {
|
|
rustc_passes::hir_id_validator::check_crate(tcx);
|
|
|
|
let sess = tcx.sess;
|
|
let mut entry_point = None;
|
|
|
|
sess.time("misc_checking_1", || {
|
|
parallel!(
|
|
{
|
|
entry_point = sess.time("looking_for_entry_point", || tcx.entry_fn(()));
|
|
|
|
sess.time("looking_for_derive_registrar", || {
|
|
tcx.ensure().proc_macro_decls_static(())
|
|
});
|
|
|
|
CStore::from_tcx(tcx).report_unused_deps(tcx);
|
|
},
|
|
{
|
|
tcx.hir().par_for_each_module(|module| {
|
|
tcx.ensure().check_mod_loops(module);
|
|
tcx.ensure().check_mod_attrs(module);
|
|
tcx.ensure().check_mod_naked_functions(module);
|
|
tcx.ensure().check_mod_unstable_api_usage(module);
|
|
tcx.ensure().check_mod_const_bodies(module);
|
|
});
|
|
},
|
|
{
|
|
sess.time("unused_lib_feature_checking", || {
|
|
rustc_passes::stability::check_unused_or_stable_features(tcx)
|
|
});
|
|
},
|
|
{
|
|
// We force these queries to run,
|
|
// since they might not otherwise get called.
|
|
// This marks the corresponding crate-level attributes
|
|
// as used, and ensures that their values are valid.
|
|
tcx.ensure().limits(());
|
|
tcx.ensure().stability_index(());
|
|
}
|
|
);
|
|
});
|
|
|
|
// passes are timed inside typeck
|
|
rustc_hir_analysis::check_crate(tcx)?;
|
|
|
|
sess.time("MIR_borrow_checking", || {
|
|
tcx.hir().par_body_owners(|def_id| tcx.ensure().mir_borrowck(def_id));
|
|
});
|
|
|
|
sess.time("MIR_effect_checking", || {
|
|
for def_id in tcx.hir().body_owners() {
|
|
tcx.ensure().thir_check_unsafety(def_id);
|
|
if !tcx.sess.opts.unstable_opts.thir_unsafeck {
|
|
rustc_mir_transform::check_unsafety::check_unsafety(tcx, def_id);
|
|
}
|
|
tcx.ensure().has_ffi_unwind_calls(def_id);
|
|
|
|
// If we need to codegen, ensure that we emit all errors from
|
|
// `mir_drops_elaborated_and_const_checked` now, to avoid discovering
|
|
// them later during codegen.
|
|
if tcx.sess.opts.output_types.should_codegen()
|
|
|| tcx.hir().body_const_context(def_id).is_some()
|
|
{
|
|
tcx.ensure().mir_drops_elaborated_and_const_checked(def_id);
|
|
tcx.ensure().unused_generic_params(ty::InstanceDef::Item(def_id.to_def_id()));
|
|
}
|
|
}
|
|
});
|
|
|
|
if tcx.sess.opts.unstable_opts.drop_tracking_mir {
|
|
tcx.hir().par_body_owners(|def_id| {
|
|
if let rustc_hir::def::DefKind::Generator = tcx.def_kind(def_id) {
|
|
tcx.ensure().mir_generator_witnesses(def_id);
|
|
tcx.ensure().check_generator_obligations(def_id);
|
|
}
|
|
});
|
|
}
|
|
|
|
sess.time("layout_testing", || layout_test::test_layout(tcx));
|
|
sess.time("abi_testing", || abi_test::test_abi(tcx));
|
|
|
|
// Avoid overwhelming user with errors if borrow checking failed.
|
|
// I'm not sure how helpful this is, to be honest, but it avoids a
|
|
// lot of annoying errors in the ui tests (basically,
|
|
// lint warnings and so on -- kindck used to do this abort, but
|
|
// kindck is gone now). -nmatsakis
|
|
if let Some(reported) = sess.has_errors() {
|
|
return Err(reported);
|
|
}
|
|
|
|
sess.time("misc_checking_3", || {
|
|
parallel!(
|
|
{
|
|
tcx.ensure().effective_visibilities(());
|
|
|
|
parallel!(
|
|
{
|
|
tcx.ensure().check_private_in_public(());
|
|
},
|
|
{
|
|
tcx.hir()
|
|
.par_for_each_module(|module| tcx.ensure().check_mod_deathness(module));
|
|
},
|
|
{
|
|
sess.time("lint_checking", || {
|
|
rustc_lint::check_crate(tcx);
|
|
});
|
|
},
|
|
{
|
|
tcx.ensure().clashing_extern_declarations(());
|
|
}
|
|
);
|
|
},
|
|
{
|
|
sess.time("privacy_checking_modules", || {
|
|
tcx.hir().par_for_each_module(|module| {
|
|
tcx.ensure().check_mod_privacy(module);
|
|
});
|
|
});
|
|
}
|
|
);
|
|
|
|
// This check has to be run after all lints are done processing. We don't
|
|
// define a lint filter, as all lint checks should have finished at this point.
|
|
sess.time("check_lint_expectations", || tcx.check_expectations(None));
|
|
});
|
|
|
|
if sess.opts.unstable_opts.print_vtable_sizes {
|
|
let traits = tcx.traits(LOCAL_CRATE);
|
|
|
|
for &tr in traits {
|
|
if !tcx.check_is_object_safe(tr) {
|
|
continue;
|
|
}
|
|
|
|
let name = ty::print::with_no_trimmed_paths!(tcx.def_path_str(tr));
|
|
|
|
let mut first_dsa = true;
|
|
|
|
// Number of vtable entries, if we didn't have upcasting
|
|
let mut entries_ignoring_upcasting = 0;
|
|
// Number of vtable entries needed solely for upcasting
|
|
let mut entries_for_upcasting = 0;
|
|
|
|
let trait_ref = ty::Binder::dummy(ty::TraitRef::identity(tcx, tr));
|
|
|
|
// A slightly edited version of the code in `rustc_trait_selection::traits::vtable::vtable_entries`,
|
|
// that works without self type and just counts number of entries.
|
|
//
|
|
// Note that this is technically wrong, for traits which have associated types in supertraits:
|
|
//
|
|
// trait A: AsRef<Self::T> + AsRef<()> { type T; }
|
|
//
|
|
// Without self type we can't normalize `Self::T`, so we can't know if `AsRef<Self::T>` and
|
|
// `AsRef<()>` are the same trait, thus we assume that those are different, and potentially
|
|
// over-estimate how many vtable entries there are.
|
|
//
|
|
// Similarly this is wrong for traits that have methods with possibly-impossible bounds.
|
|
// For example:
|
|
//
|
|
// trait B<T> { fn f(&self) where T: Copy; }
|
|
//
|
|
// Here `dyn B<u8>` will have 4 entries, while `dyn B<String>` will only have 3.
|
|
// However, since we don't know `T`, we can't know if `T: Copy` holds or not,
|
|
// thus we lean on the bigger side and say it has 4 entries.
|
|
traits::vtable::prepare_vtable_segments(tcx, trait_ref, |segment| {
|
|
match segment {
|
|
traits::vtable::VtblSegment::MetadataDSA => {
|
|
// If this is the first dsa, it would be included either way,
|
|
// otherwise it's needed for upcasting
|
|
if std::mem::take(&mut first_dsa) {
|
|
entries_ignoring_upcasting += 3;
|
|
} else {
|
|
entries_for_upcasting += 3;
|
|
}
|
|
}
|
|
|
|
traits::vtable::VtblSegment::TraitOwnEntries { trait_ref, emit_vptr } => {
|
|
// Lookup the shape of vtable for the trait.
|
|
let own_existential_entries =
|
|
tcx.own_existential_vtable_entries(trait_ref.def_id());
|
|
|
|
// The original code here ignores the method if its predicates are impossible.
|
|
// We can't really do that as, for example, all not trivial bounds on generic
|
|
// parameters are impossible (since we don't know the parameters...),
|
|
// see the comment above.
|
|
entries_ignoring_upcasting += own_existential_entries.len();
|
|
|
|
if emit_vptr {
|
|
entries_for_upcasting += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::ops::ControlFlow::Continue::<std::convert::Infallible>(())
|
|
});
|
|
|
|
sess.code_stats.record_vtable_size(
|
|
tr,
|
|
&name,
|
|
VTableSizeInfo {
|
|
trait_name: name.clone(),
|
|
entries: entries_ignoring_upcasting + entries_for_upcasting,
|
|
entries_ignoring_upcasting,
|
|
entries_for_upcasting,
|
|
upcasting_cost_percent: entries_for_upcasting as f64
|
|
/ entries_ignoring_upcasting as f64
|
|
* 100.,
|
|
},
|
|
)
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// Runs the codegen backend, after which the AST and analysis can
|
|
/// be discarded.
|
|
pub fn start_codegen<'tcx>(
|
|
codegen_backend: &dyn CodegenBackend,
|
|
tcx: TyCtxt<'tcx>,
|
|
) -> Box<dyn Any> {
|
|
info!("Pre-codegen\n{:?}", tcx.debug_stats());
|
|
|
|
let (metadata, need_metadata_module) = rustc_metadata::fs::encode_and_write_metadata(tcx);
|
|
|
|
let codegen = tcx.sess.time("codegen_crate", move || {
|
|
codegen_backend.codegen_crate(tcx, metadata, need_metadata_module)
|
|
});
|
|
|
|
// Don't run these test assertions when not doing codegen. Compiletest tries to build
|
|
// build-fail tests in check mode first and expects it to not give an error in that case.
|
|
if tcx.sess.opts.output_types.should_codegen() {
|
|
rustc_incremental::assert_module_sources::assert_module_sources(tcx);
|
|
rustc_symbol_mangling::test::report_symbol_names(tcx);
|
|
}
|
|
|
|
info!("Post-codegen\n{:?}", tcx.debug_stats());
|
|
|
|
if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) {
|
|
if let Err(error) = rustc_mir_transform::dump_mir::emit_mir(tcx) {
|
|
tcx.sess.emit_err(errors::CantEmitMIR { error });
|
|
tcx.sess.abort_if_errors();
|
|
}
|
|
}
|
|
|
|
codegen
|
|
}
|
|
|
|
fn get_recursion_limit(krate_attrs: &[ast::Attribute], sess: &Session) -> Limit {
|
|
if let Some(attr) = krate_attrs
|
|
.iter()
|
|
.find(|attr| attr.has_name(sym::recursion_limit) && attr.value_str().is_none())
|
|
{
|
|
// This is here mainly to check for using a macro, such as
|
|
// #![recursion_limit = foo!()]. That is not supported since that
|
|
// would require expanding this while in the middle of expansion,
|
|
// which needs to know the limit before expanding. Otherwise,
|
|
// validation would normally be caught in AstValidator (via
|
|
// `check_builtin_attribute`), but by the time that runs the macro
|
|
// is expanded, and it doesn't give an error.
|
|
validate_attr::emit_fatal_malformed_builtin_attribute(
|
|
&sess.parse_sess,
|
|
attr,
|
|
sym::recursion_limit,
|
|
);
|
|
}
|
|
rustc_middle::middle::limits::get_recursion_limit(krate_attrs, sess)
|
|
}
|