Auto merge of rust-lang#3190 - RalfJung:freebsd32, r=RalfJung

test Miri on 32bit FreeBSD

src/tools/miri/ci.sh

@@ -109,6 +109,7 @@ case $HOST_TARGET in
     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 libc-fs atomic env align
+    MIRI_TEST_TARGET=i686-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/tools/miri/src/shims/unix/foreign_items.rs

@@ -163,14 +163,14 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                     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)?;
+                let result = this.ftruncate64(fd, length.into())?;
                 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 length = this.read_scalar(length)?.to_int(this.libc_ty_layout("off_t").size)?;
                 let result = this.ftruncate64(fd, length)?;
                 this.write_scalar(result, dest)?;
             }

src/tools/miri/src/shims/unix/fs.rs

@@ -1504,7 +1504,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
         }
     }
 
-    fn ftruncate64(&mut self, fd: i32, length: i64) -> InterpResult<'tcx, Scalar<Provenance>> {
+    fn ftruncate64(&mut self, fd: i32, length: i128) -> InterpResult<'tcx, Scalar<Provenance>> {
         let this = self.eval_context_mut();
 
         // Reject if isolation is enabled.

src/tools/miri/tests/utils/mod.rs

@@ -7,8 +7,8 @@ mod macros;
 mod fs;
 mod miri_extern;
 
-pub use fs::*;
-pub use miri_extern::*;
+pub use self::fs::*;
+pub use self::miri_extern::*;
 
 pub fn run_provenance_gc() {
     // SAFETY: No preconditions. The GC is fine to run at any time.