Rollup merge of rust-lang#35574 - badboy:emscripten-test-fixes, r=brson

Emscripten test fixes

This picks up parts of rust-lang#31623 to disable certain tests that emscripten can't run, as threads/processes are not supported.
I re-applied @tomaka's changes manually, I can rebase those commits with his credentials if he wants.

It also disables jemalloc for emscripten (at least in Rustbuild, I have to check if there is another setting for the same thing in the old makefile approach).

This should not impact anything for normal builds.

Author: eddyb

src/bootstrap/sanity.rs

@@ -98,7 +98,8 @@ pub fn check(build: &mut Build) {
         if target.contains("rumprun") ||
            target.contains("bitrig") ||
            target.contains("openbsd") ||
-           target.contains("msvc") {
+           target.contains("msvc") ||
+           target.contains("emscripten") {
             build.config.use_jemalloc = false;
         }
 

src/libstd/sys/unix/mod.rs

@@ -83,11 +83,11 @@ pub fn init() {
         }
     }
 
-    #[cfg(not(target_os = "nacl"))]
+    #[cfg(not(any(target_os = "nacl", target_os = "emscripten")))]
     unsafe fn reset_sigpipe() {
         assert!(signal(libc::SIGPIPE, libc::SIG_IGN) != !0);
     }
-    #[cfg(target_os = "nacl")]
+    #[cfg(any(target_os = "nacl", target_os = "emscripten"))]
     unsafe fn reset_sigpipe() {}
 }
 

src/libstd/sys/unix/os.rs

@@ -551,11 +551,13 @@ pub fn home_dir() -> Option<PathBuf> {
 
     #[cfg(any(target_os = "android",
               target_os = "ios",
-              target_os = "nacl"))]
+              target_os = "nacl",
+              target_os = "emscripten"))]
     unsafe fn fallback() -> Option<OsString> { None }
     #[cfg(not(any(target_os = "android",
                   target_os = "ios",
-                  target_os = "nacl")))]
+                  target_os = "nacl",
+                  target_os = "emscripten")))]
     unsafe fn fallback() -> Option<OsString> {
         #[cfg(not(target_os = "solaris"))]
         unsafe fn getpwduid_r(me: libc::uid_t, passwd: &mut libc::passwd,

src/libstd/sys/unix/thread.rs

@@ -81,8 +81,7 @@ impl Thread {
     }
 
     #[cfg(any(target_os = "linux",
-              target_os = "android",
-              target_os = "emscripten"))]
+              target_os = "android"))]
     pub fn set_name(name: &CStr) {
         const PR_SET_NAME: libc::c_int = 15;
         // pthread wrapper only appeared in glibc 2.12, so we use syscall
@@ -118,9 +117,9 @@ impl Thread {
                                      name.as_ptr() as *mut libc::c_void);
         }
     }
-    #[cfg(any(target_env = "newlib", target_os = "solaris"))]
+    #[cfg(any(target_env = "newlib", target_os = "solaris", target_os = "emscripten"))]
     pub fn set_name(_name: &CStr) {
-        // Newlib and Illumos has no way to set a thread name.
+        // Newlib, Illumos and Emscripten have no way to set a thread name.
     }
 
     pub fn sleep(dur: Duration) {

src/libunwind/libunwind.rs

@@ -60,7 +60,6 @@ pub const unwinder_private_data_size: usize = 2;
 pub const unwinder_private_data_size: usize = 2;
 
 #[cfg(target_arch = "asmjs")]
-// FIXME: Copied from arm. Need to confirm.
 pub const unwinder_private_data_size: usize = 20;
 
 #[repr(C)]

src/test/run-pass-fulldeps/linkage-visibility.rs

@@ -12,6 +12,7 @@
 // ignore-android: FIXME(#10356)
 // ignore-windows: std::dynamic_lib does not work on Windows well
 // ignore-musl
+// ignore-emscripten no dynamic linking
 
 extern crate linkage_visibility as foo;
 

src/test/run-pass-fulldeps/logging-enabled.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // exec-env:RUST_LOG=logging_enabled=info
+// ignore-emscripten: FIXME(#31622)
 
 
 #![feature(rustc_private)]

src/test/run-pass-fulldeps/logging-separate-lines.rs

@@ -11,6 +11,7 @@
 // ignore-windows
 // exec-env:RUST_LOG=debug
 // compile-flags:-C debug-assertions=y
+// ignore-emscripten: FIXME(#31622)
 
 #![feature(rustc_private)]
 

src/test/run-pass/backtrace-debuginfo.rs

@@ -17,6 +17,7 @@
 
 // compile-flags:-g -Cllvm-args=-enable-tail-merge=0
 // ignore-pretty as this critically relies on line numbers
+// ignore-emscripten spawning processes is not supported
 
 use std::io;
 use std::io::prelude::*;

src/test/run-pass/backtrace.rs

@@ -10,6 +10,7 @@
 
 // no-pretty-expanded FIXME #15189
 // ignore-android FIXME #17520
+// ignore-emscripten spawning processes is not supported
 // compile-flags:-g
 
 use std::env;