Miri subtree update

src/tools/miri/.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
     branches:
       - 'master'
   schedule:
-    - cron: '11 5 * * *' # At 5:11 UTC every day.
+    - cron: '44 4 * * *' # At 4:44 UTC every day.
 
 defaults:
   run:
@@ -208,7 +208,7 @@ jobs:
           git push -u origin $BRANCH
       - name: Create Pull Request
         run: |
-          PR=$(gh pr create -B master --title 'Automatic sync from rustc' --body '' --label subtree-sync)
+          PR=$(gh pr create -B master --title 'Automatic sync from rustc' --body '')
           ~/.local/bin/zulip-send --user $ZULIP_BOT_EMAIL --api-key $ZULIP_API_TOKEN --site https://rust-lang.zulipchat.com \
             --stream miri --subject "Cron Job Failure (miri, $(date -u +%Y-%m))" \
             --message "A PR doing a rustc-pull [has been automatically created]($PR) for your convenience."

src/tools/miri/Cargo.lock

@@ -32,17 +32,6 @@ version = "1.0.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
 
-[[package]]
-name = "atty"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
-dependencies = [
- "hermit-abi 0.1.19",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -70,6 +59,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
+
 [[package]]
 name = "bstr"
 version = "1.4.0"
@@ -155,13 +150,13 @@ dependencies = [
 
 [[package]]
 name = "colored"
-version = "2.0.0"
+version = "2.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3616f750b84d8f0de8a58bda93e08e2a81ad3f523089b05f1dffecab48c6cbd"
+checksum = "2674ec482fbc38012cf31e6c42ba0177b431a0cb6f15fe40efa5aab1bda516f6"
 dependencies = [
- "atty",
+ "is-terminal",
  "lazy_static",
- "winapi",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -201,12 +196,12 @@ checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
 
 [[package]]
 name = "env_logger"
-version = "0.9.3"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a12e6657c4c97ebab115a42dcee77225f7f482cdd841cf7088c657a42e9e00e7"
+checksum = "85cdab6a89accf66733ad5a1693a4dcced6aeff64602b634530dd73c1f3ee9f0"
 dependencies = [
- "atty",
  "humantime",
+ "is-terminal",
  "log",
  "regex",
  "termcolor",
@@ -269,15 +264,6 @@ version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ad0a93d233ebf96623465aad4046a8d3aa4da22d4f4beba5388838c8a434bbb4"
 
-[[package]]
-name = "hermit-abi"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "hermit-abi"
 version = "0.3.1"
@@ -311,11 +297,22 @@ version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c66c74d2ae7e79a5a8f7ac924adbe38ee42a859c6539ad869eb51f0b52dc220"
 dependencies = [
- "hermit-abi 0.3.1",
+ "hermit-abi",
  "libc",
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "is-terminal"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
+dependencies = [
+ "hermit-abi",
+ "rustix 0.38.14",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.6"
@@ -330,9 +327,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.142"
+version = "0.2.148"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a987beff54b60ffa6d51982e1aa1146bc42f19bd26be28b0586f252fccf5317"
+checksum = "9cdc71e17332e86d2e1d38c1f99edcb6288ee11b815fb1a4b049eaa2114d369b"
 
 [[package]]
 name = "libffi"
@@ -369,6 +366,12 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ece97ea872ece730aed82664c424eb4c8291e1ff2480247ccf7409044bc6479f"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a9bad9f94746442c783ca431b22403b519cd7fbeed0533fdd6328b2f2212128"
+
 [[package]]
 name = "lock_api"
 version = "0.4.9"
@@ -454,7 +457,7 @@ version = "0.26.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfdda3d196821d6af13126e40375cdf7da646a96114af134d5f417a9a1dc8e1a"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cfg-if",
  "libc",
  "static_assertions",
@@ -581,7 +584,7 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -590,7 +593,7 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -655,11 +658,24 @@ version = "0.37.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acf8729d8542766f1b2cf77eb034d52f40d375bb8b615d0b147089946e16613d"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "errno",
  "io-lifetimes",
  "libc",
- "linux-raw-sys",
+ "linux-raw-sys 0.3.7",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "rustix"
+version = "0.38.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "747c788e9ce8e92b12cd485c49ddf90723550b654b32508f979b71a7b1ecda4f"
+dependencies = [
+ "bitflags 2.4.0",
+ "errno",
+ "libc",
+ "linux-raw-sys 0.4.7",
  "windows-sys 0.48.0",
 ]
 
@@ -756,7 +772,7 @@ dependencies = [
  "cfg-if",
  "fastrand",
  "redox_syscall 0.3.5",
- "rustix",
+ "rustix 0.37.19",
  "windows-sys 0.45.0",
 ]
 

src/tools/miri/README.md

@@ -362,7 +362,7 @@ Some of these are **unsound**, which means they can lead
 to Miri failing to detect cases of undefined behavior in a program.
 
 * `-Zmiri-disable-abi-check` disables checking [function ABI]. Using this flag
-  is **unsound**.
+  is **unsound**. This flag is **deprecated**.
 * `-Zmiri-disable-alignment-check` disables checking pointer alignment, so you
   can focus on other failures, but it means Miri can miss bugs in your program.
   Using this flag is **unsound**.

src/tools/miri/miri-script/src/commands.rs

@@ -339,9 +339,9 @@ impl Command {
             "Confirmed that the push round-trips back to Miri properly. Please create a rustc PR:"
         );
         println!(
-            // Open PR with `subtree-sync` label to satisfy the `no-merges` triagebot check
+            // Open PR with `subtree update` title to silence the `no-merges` triagebot check
             // See https://github.com/rust-lang/rust/pull/114157
-            "    https://github.com/rust-lang/rust/compare/{github_user}:{branch}?quick_pull=1&labels=subtree-sync"
+            "    https://github.com/rust-lang/rust/compare/{github_user}:{branch}?quick_pull=1&title=Miri+subtree+update"
         );
 
         drop(josh);

src/tools/miri/rust-version

@@ -1 +1 @@
-366dab13f711df90a6891411458544199d159cbc
+42ca6e4e5760a548a6fa858482de6d237f6fb3b8

src/tools/miri/src/bin/miri.rs

@@ -28,9 +28,9 @@ use rustc_middle::{
     middle::exported_symbols::{
         ExportedSymbol, SymbolExportInfo, SymbolExportKind, SymbolExportLevel,
     },
-    query::{LocalCrate},
-    util::Providers,
+    query::LocalCrate,
     ty::TyCtxt,
+    util::Providers,
 };
 use rustc_session::config::{CrateType, ErrorOutputType, OptLevel};
 use rustc_session::search_paths::PathKind;
@@ -359,6 +359,10 @@ fn main() {
                         since it is now enabled by default"
             );
         } else if arg == "-Zmiri-disable-abi-check" {
+            eprintln!(
+                "WARNING: the flag `-Zmiri-disable-abi-check` is deprecated and planned to be removed.\n\
+                If you have a use-case for it, please file an issue."
+            );
             miri_config.check_abi = false;
         } else if arg == "-Zmiri-disable-isolation" {
             if matches!(isolation_enabled, Some(true)) {

src/tools/miri/src/borrow_tracker/tree_borrows/exhaustive.rs

@@ -0,0 +1,111 @@
+//! Exhaustive testing utilities.
+//! (These are used in Tree Borrows `#[test]`s for thorough verification
+//! of the behavior of the state machine of permissions,
+//! but the contents of this file are extremely generic)
+#![cfg(test)]
+
+pub trait Exhaustive: Sized {
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>>;
+}
+
+macro_rules! precondition {
+    ($cond:expr) => {
+        if !$cond {
+            continue;
+        }
+    };
+}
+pub(crate) use precondition;
+
+// Trivial impls of `Exhaustive` for the standard types with 0, 1 and 2 elements respectively.
+
+impl Exhaustive for ! {
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(std::iter::empty())
+    }
+}
+
+impl Exhaustive for () {
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(std::iter::once(()))
+    }
+}
+
+impl Exhaustive for bool {
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(vec![true, false].into_iter())
+    }
+}
+
+// Some container impls for `Exhaustive`.
+
+impl<T> Exhaustive for Option<T>
+where
+    T: Exhaustive + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(std::iter::once(None).chain(T::exhaustive().map(Some)))
+    }
+}
+
+impl<T1, T2> Exhaustive for (T1, T2)
+where
+    T1: Exhaustive + Clone + 'static,
+    T2: Exhaustive + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(T1::exhaustive().flat_map(|t1| T2::exhaustive().map(move |t2| (t1.clone(), t2))))
+    }
+}
+
+impl<T> Exhaustive for [T; 1]
+where
+    T: Exhaustive + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(T::exhaustive().map(|t| [t]))
+    }
+}
+
+impl<T> Exhaustive for [T; 2]
+where
+    T: Exhaustive + Clone + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(T::exhaustive().flat_map(|t1| T::exhaustive().map(move |t2| [t1.clone(), t2])))
+    }
+}
+
+impl<T> Exhaustive for [T; 3]
+where
+    T: Exhaustive + Clone + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(
+            <[T; 2]>::exhaustive()
+                .flat_map(|[t1, t2]| T::exhaustive().map(move |t3| [t1.clone(), t2.clone(), t3])),
+        )
+    }
+}
+
+impl<T> Exhaustive for [T; 4]
+where
+    T: Exhaustive + Clone + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(<[T; 2]>::exhaustive().flat_map(|[t1, t2]| {
+            <[T; 2]>::exhaustive().map(move |[t3, t4]| [t1.clone(), t2.clone(), t3, t4])
+        }))
+    }
+}
+
+impl<T> Exhaustive for [T; 5]
+where
+    T: Exhaustive + Clone + 'static,
+{
+    fn exhaustive() -> Box<dyn Iterator<Item = Self>> {
+        Box::new(<[T; 2]>::exhaustive().flat_map(|[t1, t2]| {
+            <[T; 3]>::exhaustive().map(move |[t3, t4, t5]| [t1.clone(), t2.clone(), t3, t4, t5])
+        }))
+    }
+}