make libc-misc pass under FreeBSD

Author: RalfJung

src/tools/miri/ci.sh

@@ -108,7 +108,7 @@ case $HOST_TARGET in
     MIRI_TEST_TARGET=aarch64-unknown-linux-gnu run_tests
     MIRI_TEST_TARGET=aarch64-apple-darwin run_tests
     MIRI_TEST_TARGET=i686-pc-windows-gnu run_tests
-    MIRI_TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal hello integer vec panic/panic concurrency/simple pthreads-threadname libc-getentropy libc-getrandom libc-reallocarray atomic env/var
+    MIRI_TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal hello integer vec panic/panic concurrency/simple pthreads-threadname libc-getentropy libc-getrandom libc-reallocarray libc-misc atomic env/var
     MIRI_TEST_TARGET=aarch64-linux-android run_tests_minimal hello integer vec panic/panic
     MIRI_TEST_TARGET=wasm32-wasi run_tests_minimal no_std integer strings wasm
     MIRI_TEST_TARGET=wasm32-unknown-unknown run_tests_minimal no_std integer strings wasm

src/tools/miri/tests/pass-dep/shims/libc-misc.rs

@@ -172,6 +172,7 @@ fn test_thread_local_errno() {
 }
 
 /// Tests whether clock support exists at all
+#[cfg(not(target_os = "freebsd"))]
 fn test_clocks() {
     let mut tp = std::mem::MaybeUninit::<libc::timespec>::uninit();
     let is_error = unsafe { libc::clock_gettime(libc::CLOCK_REALTIME, tp.as_mut_ptr()) };
@@ -237,6 +238,7 @@ fn test_isatty() {
     }
 }
 
+#[cfg(not(target_os = "freebsd"))]
 fn test_posix_mkstemp() {
     use std::ffi::CString;
     use std::ffi::OsStr;
@@ -390,6 +392,8 @@ fn test_dlsym() {
 
 fn main() {
     test_posix_gettimeofday();
+
+    #[cfg(not(target_os = "freebsd"))] // FIXME we should support this on FreeBSD as well
     test_posix_mkstemp();
 
     test_posix_realpath_alloc();
@@ -399,7 +403,10 @@ fn main() {
     test_thread_local_errno();
 
     test_isatty();
+
+    #[cfg(not(target_os = "freebsd"))] // FIXME we should support this on FreeBSD as well
     test_clocks();
+
     test_dlsym();
 
     test_memcpy();