Auto merge of #18183 - lnicola:sync-from-rust, r=lnicola

internal: Sync from downstream

Author: bors

.github/workflows/ci.yml

@@ -12,6 +12,9 @@ on:
   schedule:
     - cron: '44 4 * * *' # At 4:44 UTC every day.
 
+permissions:
+  contents: write
+
 defaults:
   run:
     shell: bash

.github/workflows/sysroots.yml

@@ -13,7 +13,7 @@ jobs:
     name: Build the sysroots
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build the sysroots
         run: |
           cargo install -f rustup-toolchain-install-master

Cargo.lock

@@ -37,8 +37,6 @@ features = ['unprefixed_malloc_on_supported_platforms']
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2"
-
-[target.'cfg(target_os = "linux")'.dependencies]
 libffi = "3.2.0"
 libloading = "0.8"
 
@@ -51,7 +49,7 @@ windows-sys = { version = "0.52", features = [
 
 [dev-dependencies]
 colored = "2"
-ui_test = "0.21.1"
+ui_test = "0.26.5"
 rustc_version = "0.4"
 regex = "1.5.5"
 tempfile = "3"

Cargo.toml

@@ -187,7 +187,7 @@ Here is an example job for GitHub Actions:
     name: "Miri"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Miri
         run: |
           rustup toolchain install nightly --component miri
@@ -216,9 +216,9 @@ degree documented below):
 - For every other target with OS `linux`, `macos`, or `windows`, Miri should generally work, but we
   make no promises and we don't run tests for such targets.
 - We have unofficial support (not maintained by the Miri team itself) for some further operating systems.
+  - `solaris` / `illumos`: maintained by @devnexen. Supports `std::{env, thread, sync}`, but not `std::fs`.
   - `freebsd`: **maintainer wanted**. Supports `std::env` and parts of `std::{thread, fs}`, but not `std::sync`.
   - `android`: **maintainer wanted**. Support very incomplete, but a basic "hello world" works.
-  - `solaris` / `illumos`: maintained by @devnexen. Support very incomplete, but a basic "hello world" works.
   - `wasm`: **maintainer wanted**. Support very incomplete, not even standard output works, but an empty `main` function works.
 - For targets on other operating systems, Miri might fail before even reaching the `main` function.
 
@@ -383,7 +383,7 @@ to Miri failing to detect cases of undefined behavior in a program.
   file descriptors will be mixed up.
   This is **work in progress**; currently, only integer arguments and return values are
   supported (and no, pointer/integer casts to work around this limitation will not work;
-  they will fail horribly). It also only works on Linux hosts for now.
+  they will fail horribly). It also only works on Unix hosts for now.
 * `-Zmiri-measureme=<name>` enables `measureme` profiling for the interpreted program.
    This can be used to find which parts of your program are executing slowly under Miri.
    The profile is written out to a file inside a directory called `<name>`, and can be processed

README.md

@@ -0,0 +1,8 @@
+[package]
+name = "slice-chunked"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

bench-cargo-miri/slice-chunked/Cargo.lock

@@ -0,0 +1,26 @@
+//! This is a small example using slice::chunks, which creates a very large Tree Borrows tree.
+//! Thanks to ##3837, the GC now compacts the tree, so this test can be run in a reasonable time again.
+//! The actual code is adapted from tiny_skia, see https://github.com/RazrFalcon/tiny-skia/blob/master/src/pixmap.rs#L121
+//! To make this benchmark demonstrate the effectiveness, run with MIRIFLAGS="-Zmiri-tree-borrows -Zmiri-provenance-gc=100"
+
+const N: usize = 1000;
+
+fn input_vec() -> Vec<u8> {
+    vec![0; N]
+}
+
+fn main() {
+    let data_len = 2 * N;
+    let mut rgba_data = Vec::with_capacity(data_len);
+    let img_data = input_vec();
+    for slice in img_data.chunks(2) {
+        let gray = slice[0];
+        let alpha = slice[1];
+        rgba_data.push(gray);
+        rgba_data.push(gray);
+        rgba_data.push(gray);
+        rgba_data.push(alpha);
+    }
+
+    assert_eq!(rgba_data.len(), data_len);
+}

bench-cargo-miri/slice-chunked/Cargo.toml

@@ -26,7 +26,7 @@ time ./miri install
 # We enable all features to make sure the Stacked Borrows consistency check runs.
 echo "Building debug version of Miri"
 export CARGO_EXTRA_FLAGS="$CARGO_EXTRA_FLAGS --all-features"
-time ./miri build --all-targets # the build that all the `./miri test` below will use
+time ./miri build # the build that all the `./miri test` below will use
 
 endgroup
 
@@ -66,7 +66,7 @@ function run_tests {
     time MIRIFLAGS="${MIRIFLAGS-} -O -Zmir-opt-level=4 -Cdebug-assertions=yes" MIRI_SKIP_UI_CHECKS=1 ./miri test $TARGET_FLAG tests/{pass,panic}
   fi
   if [ -n "${MANY_SEEDS-}" ]; then
-    # Also run some many-seeds tests.
+    # Also run some many-seeds tests. (Also tests `./miri run`.)
     time for FILE in tests/many-seeds/*.rs; do
       ./miri run "--many-seeds=0..$MANY_SEEDS" $TARGET_FLAG "$FILE"
     done
@@ -75,6 +75,8 @@ function run_tests {
     # Check that the benchmarks build and run, but only once.
     time HYPERFINE="hyperfine -w0 -r1" ./miri bench $TARGET_FLAG
   fi
+  # Smoke-test `./miri run --dep`.
+  ./miri run $TARGET_FLAG --dep tests/pass-dep/getrandom.rs
 
   ## test-cargo-miri
   # On Windows, there is always "python", not "python3" or "python2".
@@ -148,11 +150,11 @@ case $HOST_TARGET in
     # Partially supported targets (tier 2)
     BASIC="empty_main integer vec string btreemap hello hashmap heap_alloc align" # ensures we have the basics: stdout/stderr, system allocator, randomness (for HashMap initialization)
     UNIX="panic/panic panic/unwind concurrency/simple atomic libc-mem libc-misc libc-random env num_cpus" # the things that are very similar across all Unixes, and hence easily supported there
-    TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal $BASIC $UNIX threadname libc-time fs
-    TEST_TARGET=i686-unknown-freebsd   run_tests_minimal $BASIC $UNIX threadname libc-time fs
-    TEST_TARGET=x86_64-unknown-illumos run_tests_minimal $BASIC $UNIX threadname pthread-sync available-parallelism libc-time tls
-    TEST_TARGET=x86_64-pc-solaris      run_tests_minimal $BASIC $UNIX threadname pthread-sync available-parallelism libc-time tls
-    TEST_TARGET=aarch64-linux-android  run_tests_minimal $BASIC $UNIX
+    TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal $BASIC $UNIX threadname pthread time fs
+    TEST_TARGET=i686-unknown-freebsd   run_tests_minimal $BASIC $UNIX threadname pthread time fs
+    TEST_TARGET=x86_64-unknown-illumos run_tests_minimal $BASIC $UNIX thread sync available-parallelism time tls
+    TEST_TARGET=x86_64-pc-solaris      run_tests_minimal $BASIC $UNIX thread sync available-parallelism time tls
+    TEST_TARGET=aarch64-linux-android  run_tests_minimal $BASIC $UNIX pthread --skip threadname --skip pthread_cond_timedwait
     TEST_TARGET=wasm32-wasip2          run_tests_minimal empty_main wasm heap_alloc libc-mem
     TEST_TARGET=wasm32-unknown-unknown run_tests_minimal empty_main wasm
     TEST_TARGET=thumbv7em-none-eabihf  run_tests_minimal no_std