std: Remove msvc/valgrind headers

.gitattributes

@@ -6,6 +6,4 @@
 *.rs rust
 src/etc/pkg/rust-logo.ico binary
 src/etc/pkg/rust-logo.png binary
-src/rt/msvc/* -whitespace
-src/rt/valgrind/* -whitespace
 *.woff binary

src/libstd/process.rs

@@ -591,7 +591,6 @@ mod tests {
     use io::prelude::*;
 
     use io::ErrorKind;
-    use rt::running_on_valgrind;
     use str;
     use super::{Command, Output, Stdio};
 
@@ -737,10 +736,7 @@ mod tests {
 
         assert!(status.success());
         assert_eq!(output_str.trim().to_string(), "hello");
-        // FIXME #7224
-        if !running_on_valgrind() {
-            assert_eq!(stderr, Vec::new());
-        }
+        assert_eq!(stderr, Vec::new());
     }
 
     #[cfg(not(target_os="android"))]
@@ -779,10 +775,7 @@ mod tests {
 
         assert!(status.success());
         assert_eq!(output_str.trim().to_string(), "hello");
-        // FIXME #7224
-        if !running_on_valgrind() {
-            assert_eq!(stderr, Vec::new());
-        }
+        assert_eq!(stderr, Vec::new());
     }
 
     #[cfg(all(unix, not(target_os="android")))]
@@ -807,7 +800,6 @@ mod tests {
     #[test]
     fn test_inherit_env() {
         use std::env;
-        if running_on_valgrind() { return; }
 
         let result = env_cmd().output().unwrap();
         let output = String::from_utf8(result.stdout).unwrap();
@@ -824,7 +816,6 @@ mod tests {
     #[test]
     fn test_inherit_env() {
         use std::env;
-        if running_on_valgrind() { return; }
 
         let mut result = env_cmd().output().unwrap();
         let output = String::from_utf8(result.stdout).unwrap();

src/libstd/rt/mod.rs

@@ -26,7 +26,7 @@ use sys;
 use usize;
 
 // Reexport some of our utilities which are expected by other crates.
-pub use self::util::{min_stack, running_on_valgrind};
+pub use self::util::min_stack;
 pub use self::unwind::{begin_unwind, begin_unwind_fmt};
 
 // Reexport some functionality from liballoc.

src/libstd/rt/util.rs

@@ -16,38 +16,6 @@ use intrinsics;
 use sync::atomic::{self, Ordering};
 use sys::stdio::Stderr;
 
-/// Dynamically inquire about whether we're running under V.
-/// You should usually not use this unless your test definitely
-/// can't run correctly un-altered. Valgrind is there to help
-/// you notice weirdness in normal, un-doctored code paths!
-pub fn running_on_valgrind() -> bool {
-    return on_valgrind();
-    #[cfg(windows)]
-    fn on_valgrind() -> bool { false }
-
-    #[cfg(unix)]
-    fn on_valgrind() -> bool {
-        use libc::uintptr_t;
-        extern {
-            fn rust_running_on_valgrind() -> uintptr_t;
-        }
-        unsafe { rust_running_on_valgrind() != 0 }
-    }
-}
-
-/// Valgrind has a fixed-sized array (size around 2000) of segment descriptors
-/// wired into it; this is a hard limit and requires rebuilding valgrind if you
-/// want to go beyond it. Normally this is not a problem, but in some tests, we
-/// produce a lot of threads casually.  Making lots of threads alone might not
-/// be a problem _either_, except on OSX, the segments produced for new threads
-/// _take a while_ to get reclaimed by the OS. Combined with the fact that libuv
-/// schedulers fork off a separate thread for polling fsevents on OSX, we get a
-/// perfect storm of creating "too many mappings" for valgrind to handle when
-/// running certain stress tests in the runtime.
-pub fn limit_thread_creation_due_to_osx_and_valgrind() -> bool {
-    (cfg!(target_os="macos")) && running_on_valgrind()
-}
-
 pub fn min_stack() -> usize {
     static MIN: atomic::AtomicUsize = atomic::AtomicUsize::new(0);
     match MIN.load(Ordering::SeqCst) {

src/libtest/lib.rs

@@ -41,7 +41,6 @@
 #![feature(fnbox)]
 #![feature(iter_cmp)]
 #![feature(libc)]
-#![feature(rt)]
 #![feature(rustc_private)]
 #![feature(set_stdio)]
 #![feature(staged_api)]
@@ -879,13 +878,7 @@ fn get_concurrency() -> usize {
                 _ => panic!("RUST_TEST_THREADS is `{}`, should be a positive integer.", s)
             }
         }
-        Err(..) => {
-            if std::rt::util::limit_thread_creation_due_to_osx_and_valgrind() {
-                1
-            } else {
-                num_cpus()
-            }
-        }
+        Err(..) => num_cpus(),
     };
 
     #[cfg(windows)]