Remove syntax and syntax_pos thread locals

Author: Zoxc

src/Cargo.lock

@@ -2090,6 +2090,7 @@ mod tests {
     use super::{OutputType, OutputTypes, Externs};
     use rustc_back::{PanicStrategy, RelroLevel};
     use syntax::symbol::Symbol;
+    use syntax;
 
     fn optgroups() -> getopts::Options {
         let mut opts = getopts::Options::new();
@@ -2110,51 +2111,55 @@ mod tests {
     // When the user supplies --test we should implicitly supply --cfg test
     #[test]
     fn test_switch_implies_cfg_test() {
-        let matches =
-            &match optgroups().parse(&["--test".to_string()]) {
-              Ok(m) => m,
-              Err(f) => panic!("test_switch_implies_cfg_test: {}", f)
-            };
-        let registry = errors::registry::Registry::new(&[]);
-        let (sessopts, cfg) = build_session_options_and_crate_config(matches);
-        let sess = build_session(sessopts, None, registry);
-        let cfg = build_configuration(&sess, cfg);
-        assert!(cfg.contains(&(Symbol::intern("test"), None)));
+        syntax::with_globals(&syntax::Globals::new(), || {
+            let matches =
+                &match optgroups().parse(&["--test".to_string()]) {
+                Ok(m) => m,
+                Err(f) => panic!("test_switch_implies_cfg_test: {}", f)
+                };
+            let registry = errors::registry::Registry::new(&[]);
+            let (sessopts, cfg) = build_session_options_and_crate_config(matches);
+            let sess = build_session(sessopts, None, registry);
+            let cfg = build_configuration(&sess, cfg);
+            assert!(cfg.contains(&(Symbol::intern("test"), None)));
+        });
     }
 
     // When the user supplies --test and --cfg test, don't implicitly add
     // another --cfg test
     #[test]
     fn test_switch_implies_cfg_test_unless_cfg_test() {
-        let matches =
-            &match optgroups().parse(&["--test".to_string(), "--cfg=test".to_string()]) {
-              Ok(m) => m,
-              Err(f) => {
-                panic!("test_switch_implies_cfg_test_unless_cfg_test: {}", f)
-              }
-            };
-        let registry = errors::registry::Registry::new(&[]);
-        let (sessopts, cfg) = build_session_options_and_crate_config(matches);
-        let sess = build_session(sessopts, None, registry);
-        let cfg = build_configuration(&sess, cfg);
-        let mut test_items = cfg.iter().filter(|&&(name, _)| name == "test");
-        assert!(test_items.next().is_some());
-        assert!(test_items.next().is_none());
+        syntax::with_globals(&syntax::Globals::new(), || {
+            let matches =
+                &match optgroups().parse(&["--test".to_string(), "--cfg=test".to_string()]) {
+                Ok(m) => m,
+                Err(f) => {
+                    panic!("test_switch_implies_cfg_test_unless_cfg_test: {}", f)
+                }
+                };
+            let registry = errors::registry::Registry::new(&[]);
+            let (sessopts, cfg) = build_session_options_and_crate_config(matches);
+            let sess = build_session(sessopts, None, registry);
+            let cfg = build_configuration(&sess, cfg);
+            let mut test_items = cfg.iter().filter(|&&(name, _)| name == "test");
+            assert!(test_items.next().is_some());
+            assert!(test_items.next().is_none());
+        });
     }
 
     #[test]
     fn test_can_print_warnings() {
-        {
+        syntax::with_globals(&syntax::Globals::new(), || {
             let matches = optgroups().parse(&[
                 "-Awarnings".to_string()
             ]).unwrap();
             let registry = errors::registry::Registry::new(&[]);
             let (sessopts, _) = build_session_options_and_crate_config(&matches);
             let sess = build_session(sessopts, None, registry);
             assert!(!sess.diagnostic().flags.can_emit_warnings);
-        }
+        });
 
-        {
+        syntax::with_globals(&syntax::Globals::new(), || {
             let matches = optgroups().parse(&[
                 "-Awarnings".to_string(),
                 "-Dwarnings".to_string()
@@ -2163,17 +2168,17 @@ mod tests {
             let (sessopts, _) = build_session_options_and_crate_config(&matches);
             let sess = build_session(sessopts, None, registry);
             assert!(sess.diagnostic().flags.can_emit_warnings);
-        }
+        });
 
-        {
+        syntax::with_globals(&syntax::Globals::new(), || {
             let matches = optgroups().parse(&[
                 "-Adead_code".to_string()
             ]).unwrap();
             let registry = errors::registry::Registry::new(&[]);
             let (sessopts, _) = build_session_options_and_crate_config(&matches);
             let sess = build_session(sessopts, None, registry);
             assert!(sess.diagnostic().flags.can_emit_warnings);
-        }
+        });
     }
 
     #[test]

src/librustc/session/config.rs

@@ -26,11 +26,6 @@
 //!
 //! `MTLock` is a mutex which disappears if cfg!(parallel_queries) is false.
 //!
-//! `rustc_global!` gives us a way to declare variables which are intended to be
-//! global for the current rustc session. This currently maps to thread-locals,
-//! since rustdoc uses the rustc libraries in multiple threads.
-//! These globals should eventually be moved into the `Session` structure.
-//!
 //! `rustc_erase_owner!` erases a OwningRef owner into Erased or Erased + Send + Sync
 //! depending on the value of cfg!(parallel_queries).
 
@@ -266,31 +261,6 @@ cfg_if! {
     }
 }
 
-#[macro_export]
-#[allow_internal_unstable]
-macro_rules! rustc_global {
-    // empty (base case for the recursion)
-    () => {};
-
-    // process multiple declarations
-    ($(#[$attr:meta])* $vis:vis static $name:ident: $t:ty = $init:expr; $($rest:tt)*) => (
-        thread_local!($(#[$attr])* $vis static $name: $t = $init);
-        rustc_global!($($rest)*);
-    );
-
-    // handle a single declaration
-    ($(#[$attr:meta])* $vis:vis static $name:ident: $t:ty = $init:expr) => (
-        thread_local!($(#[$attr])* $vis static $name: $t = $init);
-    );
-}
-
-#[macro_export]
-macro_rules! rustc_access_global {
-    ($name:path, $callback:expr) => {
-        $name.with($callback)
-    }
-}
-
 impl<T: Copy + Debug> Debug for LockCell<T> {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
         f.debug_struct("LockCell")

src/librustc_data_structures/sync.rs

@@ -192,6 +192,17 @@ pub fn run_compiler<'a>(args: &[String],
                         file_loader: Option<Box<FileLoader + Send + Sync + 'static>>,
                         emitter_dest: Option<Box<Write + Send>>)
                         -> (CompileResult, Option<Session>)
+{
+    syntax::with_globals(&syntax::Globals::new(), || {
+        run_compiler_impl(args, callbacks, file_loader, emitter_dest)
+    })
+}
+
+fn run_compiler_impl<'a>(args: &[String],
+                         callbacks: &mut CompilerCalls<'a>,
+                         file_loader: Option<Box<FileLoader + Send + Sync + 'static>>,
+                         emitter_dest: Option<Box<Write + Send>>)
+                         -> (CompileResult, Option<Session>)
 {
     macro_rules! do_or_return {($expr: expr, $sess: expr) => {
         match $expr {
@@ -1189,7 +1200,9 @@ pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<Any + Send>>
         cfg = cfg.stack_size(STACK_SIZE);
     }
 
-    let thread = cfg.spawn(f);
+    let thread = cfg.spawn(|| {
+        syntax::with_globals(&syntax::Globals::new(), || f())
+    });
     thread.unwrap().join()
 }
 

src/librustc_driver/lib.rs

@@ -33,6 +33,7 @@ use rustc::session::config::{OutputFilenames, OutputTypes};
 use rustc_trans_utils::trans_crate::TransCrate;
 use std::rc::Rc;
 use rustc_data_structures::sync::Lrc;
+use syntax;
 use syntax::ast;
 use syntax::abi::Abi;
 use syntax::codemap::{CodeMap, FilePathMapping};
@@ -97,9 +98,19 @@ fn errors(msgs: &[&str]) -> (Box<Emitter + Send>, usize) {
 }
 
 fn test_env<F>(source_string: &str,
-               (emitter, expected_err_count): (Box<Emitter + Send>, usize),
+               args: (Box<Emitter + Send>, usize),
                body: F)
     where F: FnOnce(Env)
+{
+    syntax::with_globals(&syntax::Globals::new(), || {
+        test_env_impl(source_string, args, body)
+    });
+}
+
+fn test_env_impl<F>(source_string: &str,
+                    (emitter, expected_err_count): (Box<Emitter + Send>, usize),
+                    body: F)
+    where F: FnOnce(Env)
 {
     let mut options = config::basic_options();
     options.debugging_opts.verbose = true;