libc-misc test freebsd fixes attempt

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 pthread-threadname libc-getentropy libc-getrandom libc-misc atomic env align
+    MIRI_TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal hello integer vec panic/panic concurrency/simple pthread-threadname libc-getentropy libc-getrandom libc-misc libc-fs atomic env align
     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/shims/time.rs

@@ -31,8 +31,8 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
         let mut relative_clocks;
 
         match this.tcx.sess.target.os.as_ref() {
-            "linux" => {
-                // Linux has two main kinds of clocks. REALTIME clocks return the actual time since the
+            "linux" | "freebsd" => {
+                // Linux and FreeBSD have two main kinds of clocks. REALTIME clocks return the actual time since the
                 // Unix epoch, including effects which may cause time to move backwards such as NTP.
                 // Linux further distinguishes regular and "coarse" clocks, but the "coarse" version
                 // is just specified to be "faster and less precise", so we implement both the same way.

src/shims/unix/foreign_items.rs

@@ -163,6 +163,16 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
             "ftruncate64" => {
                 let [fd, length] =
                     this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+                let fd = this.read_scalar(fd)?.to_i32()?;
+                let length = this.read_scalar(length)?.to_i64()?;
+                let result = this.ftruncate64(fd, length)?;
+                this.write_scalar(result, dest)?;
+            }
+            "ftruncate" => {
+                let [fd, length] =
+                    this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
+                let fd = this.read_scalar(fd)?.to_i32()?;
+                let length = this.read_target_isize(length)?;
                 let result = this.ftruncate64(fd, length)?;
                 this.write_scalar(result, dest)?;
             }

src/shims/unix/fs.rs

@@ -1504,16 +1504,9 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
         }
     }
 
-    fn ftruncate64(
-        &mut self,
-        fd_op: &OpTy<'tcx, Provenance>,
-        length_op: &OpTy<'tcx, Provenance>,
-    ) -> InterpResult<'tcx, Scalar<Provenance>> {
+    fn ftruncate64(&mut self, fd: i32, length: i64) -> InterpResult<'tcx, Scalar<Provenance>> {
         let this = self.eval_context_mut();
 
-        let fd = this.read_scalar(fd_op)?.to_i32()?;
-        let length = this.read_scalar(length_op)?.to_i64()?;
-
         // Reject if isolation is enabled.
         if let IsolatedOp::Reject(reject_with) = this.machine.isolated_op {
             this.reject_in_isolation("`ftruncate64`", reject_with)?;

src/shims/unix/macos/foreign_items.rs

@@ -72,13 +72,6 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                 let result = this.lseek64(fd, offset, whence)?;
                 this.write_scalar(result, dest)?;
             }
-            "ftruncate" => {
-                let [fd, length] =
-                    this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
-                // macOS is 64bit-only, so this is ftruncate64
-                let result = this.ftruncate64(fd, length)?;
-                this.write_scalar(result, dest)?;
-            }
             "realpath$DARWIN_EXTSN" => {
                 let [path, resolved_path] =
                     this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;

tests/pass-dep/shims/libc-fs-with-isolation.rs

@@ -1,4 +1,5 @@
 //@ignore-target-windows: no libc on Windows
+//@ignore-target-freebsd: FIXME needs foreign function `stat@FBSD_1.0`
 //@compile-flags: -Zmiri-isolation-error=warn-nobacktrace
 //@normalize-stderr-test: "(stat(x)?)" -> "$$STAT"
 

tests/pass-dep/shims/libc-fs.rs

@@ -23,6 +23,7 @@ fn main() {
     test_file_open_unix_extra_third_arg();
     #[cfg(target_os = "linux")]
     test_o_tmpfile_flag();
+    test_posix_mkstemp();
 }
 
 /// Prepare: compute filename and make sure the file does not exist.
@@ -151,3 +152,45 @@ fn test_o_tmpfile_flag() {
             .raw_os_error(),
     );
 }
+
+fn test_posix_mkstemp() {
+    use std::ffi::OsStr;
+    use std::os::unix::io::FromRawFd;
+    use std::path::Path;
+
+    let valid_template = "fooXXXXXX";
+    // C needs to own this as `mkstemp(3)` says:
+    // "Since it will be modified, `template` must not be a string constant, but
+    // should be declared as a character array."
+    // There seems to be no `as_mut_ptr` on `CString` so we need to use `into_raw`.
+    let ptr = CString::new(valid_template).unwrap().into_raw();
+    let fd = unsafe { libc::mkstemp(ptr) };
+    // Take ownership back in Rust to not leak memory.
+    let slice = unsafe { CString::from_raw(ptr) };
+    assert!(fd > 0);
+    let osstr = OsStr::from_bytes(slice.to_bytes());
+    let path: &Path = osstr.as_ref();
+    let name = path.file_name().unwrap().to_string_lossy();
+    assert!(name.ne("fooXXXXXX"));
+    assert!(name.starts_with("foo"));
+    assert_eq!(name.len(), 9);
+    assert_eq!(
+        name.chars().skip(3).filter(char::is_ascii_alphanumeric).collect::<Vec<char>>().len(),
+        6
+    );
+    let file = unsafe { File::from_raw_fd(fd) };
+    assert!(file.set_len(0).is_ok());
+
+    let invalid_templates = vec!["foo", "barXX", "XXXXXXbaz", "whatXXXXXXever", "X"];
+    for t in invalid_templates {
+        let ptr = CString::new(t).unwrap().into_raw();
+        let fd = unsafe { libc::mkstemp(ptr) };
+        let _ = unsafe { CString::from_raw(ptr) };
+        // "On error, -1 is returned, and errno is set to
+        // indicate the error"
+        assert_eq!(fd, -1);
+        let e = std::io::Error::last_os_error();
+        assert_eq!(e.raw_os_error(), Some(libc::EINVAL));
+        assert_eq!(e.kind(), std::io::ErrorKind::InvalidInput);
+    }
+}

tests/pass-dep/shims/libc-misc.rs

@@ -172,14 +172,13 @@ 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()) };
     assert_eq!(is_error, 0);
     let is_error = unsafe { libc::clock_gettime(libc::CLOCK_MONOTONIC, tp.as_mut_ptr()) };
     assert_eq!(is_error, 0);
-    #[cfg(target_os = "linux")]
+    #[cfg(any(target_os = "linux", target_os = "freebsd"))]
     {
         let is_error = unsafe { libc::clock_gettime(libc::CLOCK_REALTIME_COARSE, tp.as_mut_ptr()) };
         assert_eq!(is_error, 0);
@@ -238,51 +237,6 @@ fn test_isatty() {
     }
 }
 
-#[cfg(not(target_os = "freebsd"))]
-fn test_posix_mkstemp() {
-    use std::ffi::CString;
-    use std::ffi::OsStr;
-    use std::os::unix::ffi::OsStrExt;
-    use std::os::unix::io::FromRawFd;
-    use std::path::Path;
-
-    let valid_template = "fooXXXXXX";
-    // C needs to own this as `mkstemp(3)` says:
-    // "Since it will be modified, `template` must not be a string constant, but
-    // should be declared as a character array."
-    // There seems to be no `as_mut_ptr` on `CString` so we need to use `into_raw`.
-    let ptr = CString::new(valid_template).unwrap().into_raw();
-    let fd = unsafe { libc::mkstemp(ptr) };
-    // Take ownership back in Rust to not leak memory.
-    let slice = unsafe { CString::from_raw(ptr) };
-    assert!(fd > 0);
-    let osstr = OsStr::from_bytes(slice.to_bytes());
-    let path: &Path = osstr.as_ref();
-    let name = path.file_name().unwrap().to_string_lossy();
-    assert!(name.ne("fooXXXXXX"));
-    assert!(name.starts_with("foo"));
-    assert_eq!(name.len(), 9);
-    assert_eq!(
-        name.chars().skip(3).filter(char::is_ascii_alphanumeric).collect::<Vec<char>>().len(),
-        6
-    );
-    let file = unsafe { File::from_raw_fd(fd) };
-    assert!(file.set_len(0).is_ok());
-
-    let invalid_templates = vec!["foo", "barXX", "XXXXXXbaz", "whatXXXXXXever", "X"];
-    for t in invalid_templates {
-        let ptr = CString::new(t).unwrap().into_raw();
-        let fd = unsafe { libc::mkstemp(ptr) };
-        let _ = unsafe { CString::from_raw(ptr) };
-        // "On error, -1 is returned, and errno is set to
-        // indicate the error"
-        assert_eq!(fd, -1);
-        let e = std::io::Error::last_os_error();
-        assert_eq!(e.raw_os_error(), Some(libc::EINVAL));
-        assert_eq!(e.kind(), std::io::ErrorKind::InvalidInput);
-    }
-}
-
 fn test_memcpy() {
     unsafe {
         let src = [1i8, 2, 3];
@@ -406,9 +360,6 @@ fn test_reallocarray() {
 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();
     test_posix_realpath_noalloc();
     test_posix_realpath_errors();
@@ -417,7 +368,6 @@ fn main() {
 
     test_isatty();
 
-    #[cfg(not(target_os = "freebsd"))] // FIXME we should support this on FreeBSD as well
     test_clocks();
 
     test_dlsym();