Merge pull request #578 from RalfJung/misc

Test cargo-miri on Windows

appveyor.yml

@@ -27,13 +27,17 @@ build: false
 test_script:
     - set RUST_TEST_NOCAPTURE=1
     - set RUST_BACKTRACE=1
-    # Build miri
+    # Build and install miri
     - cargo build --release --all-features --all-targets
+    - cargo install --all-features --force --path .
     # Get ourselves a MIR-full libstd, and use it henceforth
-    - cargo run --release --all-features --bin cargo-miri -- miri setup
+    - cargo miri setup
     - set MIRI_SYSROOT=%USERPROFILE%\AppData\Local\miri\miri\cache\HOST
     # Test miri
     - cargo test --release --all-features
+    # Test cargo integration
+    - cd test-cargo-miri
+    - python3 run-test.py
 
 notifications:
     - provider: Email

src/fn_call.rs

@@ -562,27 +562,50 @@ pub trait EvalContextExt<'a, 'mir, 'tcx: 'a+'mir>: crate::MiriEvalContextExt<'a,
             },
 
             // Windows API stubs
+            "SetLastError" => {
+                let err = this.read_scalar(args[0])?.to_u32()?;
+                this.machine.last_error = err;
+            }
+            "GetLastError" => {
+                this.write_scalar(Scalar::from_uint(this.machine.last_error, Size::from_bits(32)), dest)?;
+            }
+
             "AddVectoredExceptionHandler" => {
                 // any non zero value works for the stdlib. This is just used for stackoverflows anyway
                 this.write_scalar(Scalar::from_int(1, dest.layout.size), dest)?;
             },
             "InitializeCriticalSection" |
             "EnterCriticalSection" |
             "LeaveCriticalSection" |
-            "DeleteCriticalSection" |
-            "SetLastError" => {
-                // Function does not return anything, nothing to do
+            "DeleteCriticalSection" => {
+                // Nothing to do, not even a return value
             },
             "GetModuleHandleW" |
             "GetProcAddress" |
-            "TryEnterCriticalSection" => {
+            "TryEnterCriticalSection" |
+            "GetConsoleScreenBufferInfo" |
+            "SetConsoleTextAttribute" => {
                 // pretend these do not exist/nothing happened, by returning zero
                 this.write_null(dest)?;
             },
-            "GetLastError" => {
-                // this is c::ERROR_CALL_NOT_IMPLEMENTED
-                this.write_scalar(Scalar::from_int(120, dest.layout.size), dest)?;
-            },
+            "GetSystemInfo" => {
+                let system_info = this.deref_operand(args[0])?;
+                let system_info_ptr = system_info.ptr.to_ptr()?;
+                // initialize with 0
+                this.memory_mut().get_mut(system_info_ptr.alloc_id)?
+                    .write_repeat(tcx, system_info_ptr, 0, system_info.layout.size)?;
+                // set number of processors to 1
+                let dword_size = Size::from_bytes(4);
+                let offset = 2*dword_size + 3*tcx.pointer_size();
+                this.memory_mut().get_mut(system_info_ptr.alloc_id)?
+                    .write_scalar(
+                        tcx,
+                        system_info_ptr.offset(offset, tcx)?,
+                        Scalar::from_int(1, dword_size).into(),
+                        dword_size,
+                    )?;
+            }
+
             "TlsAlloc" => {
                 // This just creates a key; Windows does not natively support TLS dtors.
 
@@ -596,18 +619,67 @@ pub trait EvalContextExt<'a, 'mir, 'tcx: 'a+'mir>: crate::MiriEvalContextExt<'a,
                 this.write_scalar(Scalar::from_uint(key, dest.layout.size), dest)?;
             }
             "TlsGetValue" => {
-                let key = this.read_scalar(args[0])?.to_bits(args[0].layout.size)?;
+                let key = this.read_scalar(args[0])?.to_u32()? as u128;
                 let ptr = this.machine.tls.load_tls(key)?;
                 this.write_scalar(ptr, dest)?;
             }
             "TlsSetValue" => {
-                let key = this.read_scalar(args[0])?.to_bits(args[0].layout.size)?;
+                let key = this.read_scalar(args[0])?.to_u32()? as u128;
                 let new_ptr = this.read_scalar(args[1])?.not_undef()?;
                 this.machine.tls.store_tls(key, new_ptr)?;
 
                 // Return success (1)
                 this.write_scalar(Scalar::from_int(1, dest.layout.size), dest)?;
             }
+            "GetStdHandle" => {
+                let which = this.read_scalar(args[0])?.to_i32()?;
+                // We just make this the identity function, so we know later in "WriteFile"
+                // which one it is.
+                this.write_scalar(Scalar::from_int(which, this.pointer_size()), dest)?;
+            }
+            "WriteFile" => {
+                let handle = this.read_scalar(args[0])?.to_isize(this)?;
+                let buf = this.read_scalar(args[1])?.not_undef()?;
+                let n = this.read_scalar(args[2])?.to_u32()?;
+                let written_place = this.deref_operand(args[3])?;
+                this.write_null(written_place.into())?; // spec says we always write 0 first
+                let written = if handle == -11 || handle == -12 {
+                    // stdout/stderr
+                    use std::io::{self, Write};
+
+                    let buf_cont = this.memory().read_bytes(buf, Size::from_bytes(u64::from(n)))?;
+                    let res = if handle == -11 {
+                        io::stdout().write(buf_cont)
+                    } else {
+                        io::stderr().write(buf_cont)
+                    };
+                    res.ok().map(|n| n as u32)
+                } else {
+                    eprintln!("Miri: Ignored output to handle {}", handle);
+                    Some(n) // pretend it all went well
+                };
+                // If there was no error, write back how much was written
+                if let Some(n) = written {
+                    this.write_scalar(Scalar::from_uint(n, Size::from_bits(32)), written_place.into())?;
+                }
+                // Return whether this was a success
+                this.write_scalar(
+                    Scalar::from_int(if written.is_some() { 1 } else { 0 }, dest.layout.size),
+                    dest,
+                )?;
+            }
+            "GetConsoleMode" => {
+                // Everything is a pipe
+                this.write_null(dest)?;
+            }
+            "GetEnvironmentVariableW" => {
+                // This is not the env var you are looking for
+                this.machine.last_error = 203; // ERROR_ENVVAR_NOT_FOUND
+                this.write_null(dest)?;
+            }
+            "GetCommandLineW" => {
+                this.write_scalar(Scalar::Ptr(this.machine.cmd_line.unwrap()), dest)?;
+            }
 
             // We can't execute anything else
             _ => {

src/lib.rs

@@ -18,7 +18,7 @@ use std::borrow::Cow;
 use std::env;
 
 use rustc::ty::{self, TyCtxt, query::TyCtxtAt};
-use rustc::ty::layout::{TyLayout, LayoutOf, Size};
+use rustc::ty::layout::{TyLayout, LayoutOf, Size, Align};
 use rustc::hir::{self, def_id::DefId};
 use rustc::mir;
 
@@ -123,24 +123,54 @@ pub fn create_ecx<'a, 'mir: 'a, 'tcx: 'mir>(
     let dest = ecx.eval_place(&mir::Place::Local(args.next().unwrap()))?;
     let argc = Scalar::from_int(1, dest.layout.size);
     ecx.write_scalar(argc, dest)?;
-    let argc_place = ecx.allocate(dest.layout, MiriMemoryKind::Env.into())?;
-    ecx.write_scalar(argc, argc_place.into())?;
-    ecx.machine.argc = Some(argc_place.ptr.to_ptr()?);
+    // Store argc for macOS _NSGetArgc
+    {
+        let argc_place = ecx.allocate(dest.layout, MiriMemoryKind::Env.into())?;
+        ecx.write_scalar(argc, argc_place.into())?;
+        ecx.machine.argc = Some(argc_place.ptr.to_ptr()?);
+    }
 
     // FIXME: extract main source file path
     // Third argument (argv): &[b"foo"]
+    const CMD: &str = "running-in-miri\0";
     let dest = ecx.eval_place(&mir::Place::Local(args.next().unwrap()))?;
-    let foo = ecx.memory_mut().allocate_static_bytes(b"foo\0").with_default_tag();
-    let foo_ty = ecx.tcx.mk_imm_ptr(ecx.tcx.types.u8);
-    let foo_layout = ecx.layout_of(foo_ty)?;
-    let foo_place = ecx.allocate(foo_layout, MiriMemoryKind::Env.into())?;
-    ecx.write_scalar(Scalar::Ptr(foo), foo_place.into())?;
-    ecx.memory_mut().mark_immutable(foo_place.to_ptr()?.alloc_id)?;
-    let argv = foo_place.ptr;
-    ecx.write_scalar(argv, dest)?;
-    let argv_place = ecx.allocate(dest.layout, MiriMemoryKind::Env.into())?;
-    ecx.write_scalar(argv, argv_place.into())?;
-    ecx.machine.argv = Some(argv_place.ptr.to_ptr()?);
+    let cmd = ecx.memory_mut().allocate_static_bytes(CMD.as_bytes()).with_default_tag();
+    let raw_str_layout = ecx.layout_of(ecx.tcx.mk_imm_ptr(ecx.tcx.types.u8))?;
+    let cmd_place = ecx.allocate(raw_str_layout, MiriMemoryKind::Env.into())?;
+    ecx.write_scalar(Scalar::Ptr(cmd), cmd_place.into())?;
+    ecx.memory_mut().mark_immutable(cmd_place.to_ptr()?.alloc_id)?;
+    // Store argv for macOS _NSGetArgv
+    {
+        let argv = cmd_place.ptr;
+        ecx.write_scalar(argv, dest)?;
+        let argv_place = ecx.allocate(dest.layout, MiriMemoryKind::Env.into())?;
+        ecx.write_scalar(argv, argv_place.into())?;
+        ecx.machine.argv = Some(argv_place.ptr.to_ptr()?);
+    }
+    // Store cmdline as UTF-16 for Windows GetCommandLineW
+    {
+        let tcx = &{ecx.tcx.tcx};
+        let cmd_utf16: Vec<u16> = CMD.encode_utf16().collect();
+        let cmd_ptr = ecx.memory_mut().allocate(
+            Size::from_bytes(cmd_utf16.len() as u64 * 2),
+            Align::from_bytes(2).unwrap(),
+            MiriMemoryKind::Env.into(),
+        )?.with_default_tag();
+        ecx.machine.cmd_line = Some(cmd_ptr);
+        // store the UTF-16 string
+        let char_size = Size::from_bytes(2);
+        let cmd_alloc = ecx.memory_mut().get_mut(cmd_ptr.alloc_id)?;
+        let mut cur_ptr = cmd_ptr;
+        for &c in cmd_utf16.iter() {
+            cmd_alloc.write_scalar(
+                tcx,
+                cur_ptr,
+                Scalar::from_uint(c, char_size).into(),
+                char_size,
+            )?;
+            cur_ptr = cur_ptr.offset(char_size, tcx)?;
+        }
+    }
 
     assert!(args.next().is_none(), "start lang item has more arguments than expected");
 
@@ -263,8 +293,13 @@ pub struct Evaluator<'tcx> {
 
     /// Program arguments (`Option` because we can only initialize them after creating the ecx).
     /// These are *pointers* to argc/argv because macOS.
+    /// We also need the full cmdline as one string because Window.
     pub(crate) argc: Option<Pointer<Borrow>>,
     pub(crate) argv: Option<Pointer<Borrow>>,
+    pub(crate) cmd_line: Option<Pointer<Borrow>>,
+
+    /// Last OS error
+    pub(crate) last_error: u32,
 
     /// TLS state
     pub(crate) tls: TlsData<'tcx>,
@@ -282,6 +317,8 @@ impl<'tcx> Evaluator<'tcx> {
             env_vars: HashMap::default(),
             argc: None,
             argv: None,
+            cmd_line: None,
+            last_error: 0,
             tls: TlsData::default(),
             validate,
             stacked_borrows: stacked_borrows::State::default(),

tests/run-pass/box-pair-to-vec.rs

@@ -1,5 +1,3 @@
-//ignore-msvc: Stdout not implemented on Windows
-
 #[repr(C)]
 #[derive(Debug)]
 struct PairFoo {

tests/run-pass/catch.rs

@@ -1,4 +1,3 @@
-//ignore-msvc: Stdout not implemented on Windows
 use std::panic::{catch_unwind, AssertUnwindSafe};
 
 fn main() {

tests/run-pass/format.rs

@@ -1,4 +1,3 @@
-//ignore-msvc: Stdout not implemented on Windows
 fn main() {
     println!("Hello {}", 13);
 }

tests/run-pass/hello.rs

@@ -1,4 +1,3 @@
-//ignore-msvc: Stdout not implemented on Windows
 fn main() {
     println!("Hello, world!");
 }

tests/run-pass/issue-17877.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 //ignore-windows: Causes a stack overflow?!? Likely a rustc bug: https://github.com/rust-lang/rust/issues/53820
-//Once that bug is fixed, increase the size to 16*1024 and enable on all platforms.
+//FIXME: Once that bug is fixed, increase the size to 16*1024 and enable on all platforms.
 
 #![feature(slice_patterns)]
 

tests/run-pass/issue-3794.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//ignore-msvc: Stdout not implemented on Windows
 #![feature(box_syntax)]
 
 trait T {