Test miri on mac os

.travis.yml

@@ -1,8 +1,17 @@
 language: rust
 cache: cargo
+
+os:
+- osx
+- linux
+
 rust:
 - nightly
 before_script:
+# mac os weirdness (https://github.com/travis-ci/travis-ci/issues/6307)
+- curl -sSL https://rvm.io/mpapis.asc | gpg --import -
+- rvm get stable
+# actual travis code
 - export PATH=$HOME/.local/bin:$PATH
 - rustup target add i686-unknown-linux-gnu
 - rustup target add i686-pc-windows-gnu

src/fn_call.rs

@@ -531,9 +531,10 @@ impl<'a, 'mir, 'tcx: 'mir + 'a> EvalContextExt<'tcx> for EvalContext<'a, 'mir, '
                 // Return success (0)
                 self.write_null(dest, dest_ty)?;
             }
+
             "_tlv_atexit" => {
-                // TODO: handle it
-            }
+                return err!(Unimplemented("can't interpret with full mir for osx target".to_owned()));
+            },
 
             // Stub out all the other pthread calls to just return 0
             link_name if link_name.starts_with("pthread_") => {
@@ -541,6 +542,12 @@ impl<'a, 'mir, 'tcx: 'mir + 'a> EvalContextExt<'tcx> for EvalContext<'a, 'mir, '
                 self.write_null(dest, dest_ty)?;
             }
 
+            "mmap" => {
+                // This is a horrible hack, but well... the guard page mechanism calls mmap and expects a particular return value, so we give it that value
+                let addr = self.into_ptr(args[0].value)?;
+                self.write_ptr(dest, addr, dest_ty)?;
+            }
+
             _ => {
                 return err!(Unimplemented(
                     format!("can't call C ABI function: {}", link_name),

tests/run-pass-fullmir/catch.rs

@@ -1,4 +1,5 @@
 //ignore-msvc
+//ignore-macos
 use std::panic::{catch_unwind, AssertUnwindSafe};
 
 fn main() {

tests/run-pass-fullmir/format.rs

@@ -1,4 +1,5 @@
 //ignore-msvc
+//ignore-macos
 fn main() {
     println!("Hello {}", 13);
 }

tests/run-pass-fullmir/hello.rs

@@ -1,4 +1,5 @@
 //ignore-msvc
+//ignore-macos
 fn main() {
     println!("Hello, world!");
 }

tests/run-pass-fullmir/issue-3794.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 //ignore-msvc
+//ignore-macos
 #![feature(box_syntax)]
 
 trait T {