auto merge of #11565 : mozilla/rust/snapshot, r=huonw

Author: bors

src/libnative/lib.rs

@@ -39,30 +39,6 @@ static OS_DEFAULT_STACK_ESTIMATE: uint = 1 << 20;
 #[cfg(unix, not(android))]
 static OS_DEFAULT_STACK_ESTIMATE: uint = 2 * (1 << 20);
 
-
-// XXX: this should not exist here
-#[cfg(stage0, nativestart)]
-#[lang = "start"]
-pub fn lang_start(main: *u8, argc: int, argv: **u8) -> int {
-    use std::cast;
-    use std::task;
-
-    do start(argc, argv) {
-        // Instead of invoking main directly on this thread, invoke it on
-        // another spawned thread that we are guaranteed to know the size of the
-        // stack of. Currently, we do not have a method of figuring out the size
-        // of the main thread's stack, so for stack overflow detection to work
-        // we must spawn the task in a subtask which we know the stack size of.
-        let main: extern "Rust" fn() = unsafe { cast::transmute(main) };
-        let mut task = task::task();
-        task.name("<main>");
-        match do task.try { main() } {
-            Ok(()) => { os::set_exit_status(0); }
-            Err(..) => { os::set_exit_status(rt::DEFAULT_ERROR_CODE); }
-        }
-    }
-}
-
 /// Executes the given procedure after initializing the runtime with the given
 /// argc/argv.
 ///

src/libstd/cleanup.rs

@@ -17,6 +17,8 @@ use unstable::raw;
 
 type DropGlue<'a> = 'a |**TyDesc, *c_void|;
 
+static RC_IMMORTAL : uint = 0x77777777;
+
 /*
  * Box annihilation
  *
@@ -25,24 +27,21 @@ type DropGlue<'a> = 'a |**TyDesc, *c_void|;
 
 struct AnnihilateStats {
     n_total_boxes: uint,
-    n_unique_boxes: uint,
     n_bytes_freed: uint
 }
 
 unsafe fn each_live_alloc(read_next_before: bool,
-                          f: |alloc: *mut raw::Box<()>, uniq: bool| -> bool)
+                          f: |alloc: *mut raw::Box<()>| -> bool)
                           -> bool {
     //! Walks the internal list of allocations
 
-    use managed;
     use rt::local_heap;
 
     let mut alloc = local_heap::live_allocs();
     while alloc != ptr::mut_null() {
         let next_before = (*alloc).next;
-        let uniq = (*alloc).ref_count == managed::RC_MANAGED_UNIQUE;
 
-        if !f(alloc, uniq) {
+        if !f(alloc) {
             return false;
         }
 
@@ -70,25 +69,19 @@ fn debug_mem() -> bool {
 pub unsafe fn annihilate() {
     use rt::local_heap::local_free;
     use mem;
-    use managed;
 
     let mut stats = AnnihilateStats {
         n_total_boxes: 0,
-        n_unique_boxes: 0,
         n_bytes_freed: 0
     };
 
     // Pass 1: Make all boxes immortal.
     //
     // In this pass, nothing gets freed, so it does not matter whether
     // we read the next field before or after the callback.
-    each_live_alloc(true, |alloc, uniq| {
+    each_live_alloc(true, |alloc| {
         stats.n_total_boxes += 1;
-        if uniq {
-            stats.n_unique_boxes += 1;
-        } else {
-            (*alloc).ref_count = managed::RC_IMMORTAL;
-        }
+        (*alloc).ref_count = RC_IMMORTAL;
         true
     });
 
@@ -97,12 +90,10 @@ pub unsafe fn annihilate() {
     // In this pass, unique-managed boxes may get freed, but not
     // managed boxes, so we must read the `next` field *after* the
     // callback, as the original value may have been freed.
-    each_live_alloc(false, |alloc, uniq| {
-        if !uniq {
-            let tydesc = (*alloc).type_desc;
-            let data = &(*alloc).data as *();
-            ((*tydesc).drop_glue)(data as *i8);
-        }
+    each_live_alloc(false, |alloc| {
+        let tydesc = (*alloc).type_desc;
+        let data = &(*alloc).data as *();
+        ((*tydesc).drop_glue)(data as *i8);
         true
     });
 
@@ -112,22 +103,19 @@ pub unsafe fn annihilate() {
     // unique-managed boxes, though I think that none of those are
     // left), so we must read the `next` field before, since it will
     // not be valid after.
-    each_live_alloc(true, |alloc, uniq| {
-        if !uniq {
-            stats.n_bytes_freed +=
-                (*((*alloc).type_desc)).size
-                + mem::size_of::<raw::Box<()>>();
-            local_free(alloc as *i8);
-        }
+    each_live_alloc(true, |alloc| {
+        stats.n_bytes_freed +=
+            (*((*alloc).type_desc)).size
+            + mem::size_of::<raw::Box<()>>();
+        local_free(alloc as *i8);
         true
     });
 
     if debug_mem() {
         // We do logging here w/o allocation.
         debug!("annihilator stats:\n  \
                        total boxes: {}\n  \
-                      unique boxes: {}\n  \
                        bytes freed: {}",
-                stats.n_total_boxes, stats.n_unique_boxes, stats.n_bytes_freed);
+                stats.n_total_boxes, stats.n_bytes_freed);
     }
 }

src/libstd/managed.rs

@@ -14,9 +14,6 @@ use ptr::to_unsafe_ptr;
 
 #[cfg(not(test))] use cmp::*;
 
-pub static RC_MANAGED_UNIQUE : uint = (-2) as uint;
-pub static RC_IMMORTAL : uint = 0x77777777;
-
 /// Returns the refcount of a shared box (as just before calling this)
 #[inline]
 pub fn refcount<T>(t: @T) -> uint {

src/libstd/reflect.rs

@@ -227,14 +227,6 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
         true
     }
 
-    #[cfg(stage0)]
-    fn visit_uniq_managed(&mut self, mtbl: uint, inner: *TyDesc) -> bool {
-        self.align_to::<~u8>();
-        if ! self.inner.visit_uniq_managed(mtbl, inner) { return false; }
-        self.bump_past::<~u8>();
-        true
-    }
-
     fn visit_ptr(&mut self, mtbl: uint, inner: *TyDesc) -> bool {
         self.align_to::<*u8>();
         if ! self.inner.visit_ptr(mtbl, inner) { return false; }
@@ -276,14 +268,6 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
         true
     }
 
-    #[cfg(stage0)]
-    fn visit_evec_uniq_managed(&mut self, mtbl: uint, inner: *TyDesc) -> bool {
-        self.align_to::<~[@u8]>();
-        if ! self.inner.visit_evec_uniq_managed(mtbl, inner) { return false; }
-        self.bump_past::<~[@u8]>();
-        true
-    }
-
     fn visit_evec_slice(&mut self, mtbl: uint, inner: *TyDesc) -> bool {
         self.align_to::<&'static [u8]>();
         if ! self.inner.visit_evec_slice(mtbl, inner) { return false; }

src/libstd/repr.rs

@@ -310,15 +310,6 @@ impl<'a> TyVisitor for ReprVisitor<'a> {
         })
     }
 
-    #[cfg(stage0)]
-    fn visit_uniq_managed(&mut self, _mtbl: uint, inner: *TyDesc) -> bool {
-        self.writer.write(['~' as u8]);
-        self.get::<&raw::Box<()>>(|this, b| {
-            let p = ptr::to_unsafe_ptr(&b.data) as *c_void;
-            this.visit_ptr_inner(p, inner);
-        })
-    }
-
     fn visit_ptr(&mut self, mtbl: uint, _inner: *TyDesc) -> bool {
         self.get::<*c_void>(|this, p| {
             write!(this.writer, "({} as *", *p);
@@ -359,14 +350,6 @@ impl<'a> TyVisitor for ReprVisitor<'a> {
         })
     }
 
-    #[cfg(stage0)]
-    fn visit_evec_uniq_managed(&mut self, mtbl: uint, inner: *TyDesc) -> bool {
-        self.get::<&raw::Box<raw::Vec<()>>>(|this, b| {
-            this.writer.write(['~' as u8]);
-            this.write_unboxed_vec_repr(mtbl, &b.data, inner);
-        })
-    }
-
     fn visit_evec_slice(&mut self, mtbl: uint, inner: *TyDesc) -> bool {
         self.get::<raw::Slice<()>>(|this, s| {
             this.writer.write(['&' as u8]);

src/libstd/unstable/intrinsics.rs

@@ -47,41 +47,8 @@ pub use realstd::unstable::intrinsics::{TyDesc, Opaque, TyVisitor, TypeId};
 
 pub type GlueFn = extern "Rust" fn(*i8);
 
-// NOTE remove after next snapshot
 #[lang="ty_desc"]
-#[cfg(not(test), stage0)]
-pub struct TyDesc {
-    // sizeof(T)
-    size: uint,
-
-    // alignof(T)
-    align: uint,
-
-    // Called on a copy of a value of type `T` *after* memcpy
-    take_glue: GlueFn,
-
-    // Called when a value of type `T` is no longer needed
-    drop_glue: GlueFn,
-
-    // Called by drop glue when a value of type `T` can be freed
-    free_glue: GlueFn,
-
-    // Called by reflection visitor to visit a value of type `T`
-    visit_glue: GlueFn,
-
-    // If T represents a box pointer (`@U` or `~U`), then
-    // `borrow_offset` is the amount that the pointer must be adjusted
-    // to find the payload.  This is always derivable from the type
-    // `U`, but in the case of `@Trait` or `~Trait` objects, the type
-    // `U` is unknown.
-    borrow_offset: uint,
-
-    // Name corresponding to the type
-    name: &'static str
-}
-
-#[lang="ty_desc"]
-#[cfg(not(test), not(stage0))]
+#[cfg(not(test))]
 pub struct TyDesc {
     // sizeof(T)
     size: uint,
@@ -139,17 +106,13 @@ pub trait TyVisitor {
 
     fn visit_box(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_uniq(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
-    #[cfg(stage0)]
-    fn visit_uniq_managed(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_ptr(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_rptr(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
 
     fn visit_vec(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_unboxed_vec(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_evec_box(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_evec_uniq(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
-    #[cfg(stage0)]
-    fn visit_evec_uniq_managed(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_evec_slice(&mut self, mtbl: uint, inner: *TyDesc) -> bool;
     fn visit_evec_fixed(&mut self, n: uint, sz: uint, align: uint,
                         mtbl: uint, inner: *TyDesc) -> bool;