Remove IGNORED_ATTR_NAMES and make PROFQ_CHAN a scoped thread local.

Author: Zoxc

src/Cargo.lock

@@ -15,6 +15,7 @@ fmt_macros = { path = "../libfmt_macros" }
 graphviz = { path = "../libgraphviz" }
 jobserver = "0.1"
 log = "0.3"
+scoped-tls = { git = "https://github.com/Zoxc/scoped-tls.git", features=["nightly"] }
 owning_ref = { git = "https://github.com/Zoxc/owning-ref-rs.git" }
 rustc_back = { path = "../librustc_back" }
 rustc_const_math = { path = "../librustc_const_math" }

src/librustc/Cargo.toml

@@ -34,10 +34,10 @@ use rustc_data_structures::stable_hasher::{HashStable, StableHashingContextProvi
 use rustc_data_structures::accumulate_vec::AccumulateVec;
 use rustc_data_structures::fx::FxHashSet;
 
-rustc_global!(static IGNORED_ATTR_NAMES: FxHashSet<Symbol> = {
+pub fn compute_ignored_attr_names() -> FxHashSet<Symbol> {
     debug_assert!(ich::IGNORED_ATTRIBUTES.len() > 0);
     ich::IGNORED_ATTRIBUTES.iter().map(|&s| Symbol::intern(s)).collect()
-});
+}
 
 /// This is the context state available during incr. comp. hashing. It contains
 /// enough information to transform DefIds and HirIds into stable DefPaths (i.e.
@@ -177,9 +177,7 @@ impl<'gcx> StableHashingContext<'gcx> {
 
     #[inline]
     pub fn is_ignored_attr(&self, name: Symbol) -> bool {
-        rustc_access_global!(IGNORED_ATTR_NAMES, |ignored_attrs| {
-            ignored_attrs.contains(&name)
-        })
+        self.sess.ignored_attr_names.contains(&name)
     }
 
     pub fn hash_hir_item_like<F: FnOnce(&mut Self)>(&mut self, f: F) {

src/librustc/ich/hcx.rs

@@ -13,7 +13,7 @@
 pub use self::fingerprint::Fingerprint;
 pub use self::caching_codemap_view::CachingCodemapView;
 pub use self::hcx::{StableHashingContext, NodeIdHashingMode,
-                    hash_stable_trait_impls};
+                    hash_stable_trait_impls, compute_ignored_attr_names};
 mod fingerprint;
 mod caching_codemap_view;
 mod hcx;

src/librustc/ich/mod.rs

@@ -86,7 +86,7 @@ extern crate rustc_errors as errors;
 #[macro_use] extern crate syntax;
 extern crate syntax_pos;
 extern crate jobserver;
-
+#[macro_use] extern crate scoped_tls;
 extern crate serialize as rustc_serialize; // used by deriving
 
 // Note that librustc doesn't actually depend on these crates, see the note in

src/librustc/lib.rs

@@ -14,6 +14,7 @@ pub use self::code_stats::{SizeKind, TypeSizeInfo, VariantInfo};
 use hir::def_id::{CrateNum, DefIndex};
 use ich::Fingerprint;
 
+use ich;
 use lint;
 use middle::allocator::AllocatorKind;
 use middle::dependency_format;
@@ -22,6 +23,7 @@ use session::config::DebugInfoLevel;
 use ty::tls;
 use util::nodemap::{FxHashMap, FxHashSet};
 use util::common::{duration_to_secs_str, ErrorReported};
+use util::common::ProfileQueriesMsg;
 
 use rustc_data_structures::sync::{self, Lrc, RwLock, Lock, LockCell, ReadGuard};
 
@@ -30,6 +32,7 @@ use errors::{self, DiagnosticBuilder, DiagnosticId};
 use errors::emitter::{Emitter, EmitterWriter};
 use syntax::json::JsonEmitter;
 use syntax::feature_gate;
+use syntax::symbol::Symbol;
 use syntax::parse;
 use syntax::parse::ParseSess;
 use syntax::{ast, codemap};
@@ -48,6 +51,7 @@ use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::sync::{Once, ONCE_INIT};
 use std::time::Duration;
+use std::sync::mpsc;
 
 mod code_stats;
 pub mod config;
@@ -112,6 +116,12 @@ pub struct Session {
 
     incr_comp_session: RwLock<IncrCompSession>,
 
+    /// A cache of attributes ignored by StableHashingContext
+    pub ignored_attr_names: FxHashSet<Symbol>,
+
+    /// Used by -Z profile-queries in util::common
+    pub profile_channel: Lock<Option<mpsc::Sender<ProfileQueriesMsg>>>,
+
     /// Some measurements that are being gathered during compilation.
     pub perf_stats: PerfStats,
 
@@ -893,6 +903,8 @@ pub fn build_session_(sopts: config::Options,
         injected_panic_runtime: LockCell::new(None),
         imported_macro_spans: Lock::new(HashMap::new()),
         incr_comp_session: RwLock::new(IncrCompSession::NotInitialized),
+        ignored_attr_names: ich::compute_ignored_attr_names(),
+        profile_channel: Lock::new(None),
         perf_stats: PerfStats {
             svh_time: LockCell::new(Duration::from_secs(0)),
             incr_comp_hashes_time: LockCell::new(Duration::from_secs(0)),

src/librustc/session/mod.rs

@@ -37,7 +37,7 @@ pub struct ErrorReported;
 thread_local!(static TIME_DEPTH: Cell<usize> = Cell::new(0));
 
 /// Initialized for -Z profile-queries
-rustc_global!(static PROFQ_CHAN: Lock<Option<Sender<ProfileQueriesMsg>>> = Lock::new(None));
+scoped_thread_local!(pub static PROFQ_CHAN: Lock<Option<Sender<ProfileQueriesMsg>>>);
 
 /// Parameters to the `Dump` variant of type `ProfileQueriesMsg`.
 #[derive(Clone,Debug)]
@@ -79,7 +79,7 @@ pub enum ProfileQueriesMsg {
 
 /// If enabled, send a message to the profile-queries thread
 pub fn profq_msg(msg: ProfileQueriesMsg) {
-    rustc_access_global!(PROFQ_CHAN, |sender| {
+    PROFQ_CHAN.with(|sender| {
         if let Some(s) = sender.borrow().as_ref() {
             s.send(msg).unwrap()
         } else {
@@ -95,7 +95,7 @@ pub fn profq_msg(msg: ProfileQueriesMsg) {
 
 /// Set channel for profile queries channel
 pub fn profq_set_chan(s: Sender<ProfileQueriesMsg>) -> bool {
-    rustc_access_global!(PROFQ_CHAN, |chan| {
+    PROFQ_CHAN.with(|chan| {
         if chan.borrow().is_none() {
             *chan.borrow_mut() = Some(s);
             true

src/librustc/util/common.rs

@@ -52,6 +52,7 @@ use std::io::{self, Write};
 use std::iter;
 use std::path::{Path, PathBuf};
 use rustc_data_structures::sync::{Sync, Lrc};
+use rustc::util::common::PROFQ_CHAN;
 use std::sync::mpsc;
 use syntax::{ast, diagnostics, visit};
 use syntax::attr;
@@ -74,6 +75,18 @@ pub fn compile_input(sess: &Session,
                      output: &Option<PathBuf>,
                      addl_plugins: Option<Vec<String>>,
                      control: &CompileController) -> CompileResult {
+    PROFQ_CHAN.set(&sess.profile_channel, || {
+        compile_input_impl(sess, cstore, input, outdir, output, addl_plugins, control)
+    })
+}
+
+fn compile_input_impl(sess: &Session,
+                      cstore: &CStore,
+                      input: &Input,
+                      outdir: &Option<PathBuf>,
+                      output: &Option<PathBuf>,
+                      addl_plugins: Option<Vec<String>>,
+                      control: &CompileController) -> CompileResult {
     use rustc::session::config::CrateType;
 
     macro_rules! controller_entry_point {