[0.2] Backports

.github/workflows/ci.yaml

@@ -44,8 +44,20 @@ jobs:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         run: ./ci/install-rust.sh
+
+      # FIXME(ci): These `du` statements are temporary for debugging cache
+      - name: Target size before restoring cache
+        run: du -sh target | sort -k 2 || true
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.os }}-${{ matrix.toolchain }}
+      - name: Target size after restoring cache
+        run: du -sh target | sort -k 2 || true
+
       - name: Execute build.sh
         run: ./ci/verify-build.sh
+      - name: Target size after job completion
+        run: du -sh target | sort -k 2
 
   test_tier1:
     name: Test tier1
@@ -82,6 +94,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         run: ./ci/install-rust.sh
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.target }}
       - name: Run natively
         if: "!matrix.docker"
         run: ./ci/run.sh ${{ matrix.target }}
@@ -133,6 +148,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         run: ./ci/install-rust.sh
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.target }}
       - name: Execute run-docker.sh
         run: ./ci/run-docker.sh ${{ matrix.target }}
 

ci/verify-build.sh

@@ -28,10 +28,16 @@ if [ "$TOOLCHAIN" = "nightly" ] ; then
     rustup component add rust-src
 fi
 
+# Print GHA workflow commands
+echo_if_ci() {
+    # Discard stderr so the "set -x" trace doesn't show up
+    { [ -n "${CI:-}" ] && echo "$1"; } 2> /dev/null
+}
+
 # Run the tests for a specific target
 test_target() {
-    target="${1}"
-    no_dist="${2:-0}"
+    target="$1"
+    no_dist="$2"
 
     RUSTFLAGS="${RUSTFLAGS:-}"
 
@@ -269,7 +275,13 @@ case "$rust" in
     *) supports_wasi_pn=0 ;;
 esac
 
-for target in $targets; do
+some_tests_run=0
+
+# Apply the `FILTER` variable, do OS-specific tasks, and run a target
+filter_and_run() {
+    target="$1"
+    no_dist="${2:-0}"
+
     if echo "$target" | grep -q "$filter"; then
         if [ "$os" = "windows" ]; then
             TARGET="$target" ./ci/install-rust.sh
@@ -282,27 +294,28 @@ for target in $targets; do
 
         # `wasm32-wasip2` only exists in recent versions of Rust
         if [ "$target" = "wasm32-wasip2" ] && [ "$supports_wasi_pn" = "0" ]; then
-            continue
+            return
         fi
 
-        test_target "$target"
-        test_run=1
+        test_target "$target" "$no_dist"
+        some_tests_run=1
     fi
+}
+
+for target in $targets; do
+    echo_if_ci "::group::Target: $target"
+    filter_and_run "$target"
+    echo_if_ci "::endgroup::"
 done
 
 for target in ${no_dist_targets:-}; do
-    if echo "$target" | grep -q "$filter"; then
-        if [ "$os" = "windows" ]; then
-            TARGET="$target" ./ci/install-rust.sh
-        fi
-
-        test_target "$target" 1
-        test_run=1
-    fi
+    echo_if_ci "::group::Target: $target"
+    filter_and_run "$target" 1
+    echo_if_ci "::endgroup::"
 done
 
 # Make sure we didn't accidentally filter everything
-if [ "${test_run:-}" != 1 ]; then
+if [ "$some_tests_run" != 1 ]; then
     echo "No tests were run"
     exit 1
 fi

libc-test/build.rs

@@ -42,6 +42,8 @@ fn do_cc() {
         || target.contains("l4re")
         || target.contains("android")
         || target.contains("emscripten")
+        || target.contains("solaris")
+        || target.contains("illumos")
     {
         cc::Build::new().file("src/sigrt.c").compile("sigrt");
     }
@@ -2060,9 +2062,9 @@ fn test_android(target: &str) {
             | "PF_IO_WORKER"
             | "PF_WQ_WORKER"
             | "PF_FORKNOEXEC"
+            | "PF_MCE_PROCESS"
             | "PF_SUPERPRIV"
             | "PF_DUMPCORE"
-            | "PF_MCE_PROCESS"
             | "PF_SIGNALED"
             | "PF_MEMALLOC"
             | "PF_NPROC_EXCEEDED"
@@ -2078,6 +2080,7 @@ fn test_android(target: &str) {
             | "PF_NO_SETAFFINITY"
             | "PF_MCE_EARLY"
             | "PF_MEMALLOC_PIN"
+            | "PF_BLOCK_TS"
             | "PF_SUSPEND_TASK" => true,
 
             _ => false,
@@ -2649,6 +2652,11 @@ fn test_freebsd(target: &str) {
             // Added in FreeBSD 14.0
             "TCP_FUNCTION_ALIAS" if Some(14) > freebsd_ver => true,
 
+            // These constants may change or disappear in future OS releases, and they probably
+            // have no legitimate use in applications anyway.
+            "CAP_UNUSED0_44" | "CAP_UNUSED0_57" | "CAP_UNUSED1_22" | "CAP_UNUSED1_57" |
+                "CAP_ALL0" | "CAP_ALL1" => true,
+
             _ => false,
         }
     });
@@ -4308,12 +4316,17 @@ fn test_linux(target: &str) {
             | "PF_RANDOMIZE"
             | "PF_NO_SETAFFINITY"
             | "PF_MCE_EARLY"
-            | "PF_MEMALLOC_PIN" => true,
+            | "PF_MEMALLOC_PIN"
+            | "PF_BLOCK_TS"
+            | "PF_SUSPEND_TASK" => true,
 
             // FIXME: Requires >= 6.9 kernel headers.
             "EPIOCSPARAMS"
             | "EPIOCGPARAMS" => true,
 
+            // FIXME: Requires >= 6.11 kernel headers.
+            "MAP_DROPPABLE" => true,
+
             _ => false,
         }
     });

libc-test/semver/linux-gnu.txt

@@ -78,12 +78,6 @@ HUGETLB_FLAG_ENCODE_64KB
 HUGETLB_FLAG_ENCODE_8MB
 HUGETLB_FLAG_ENCODE_MASK
 HUGETLB_FLAG_ENCODE_SHIFT
-IFA_FLAGS
-IFA_F_MANAGETEMPADDR
-IFA_F_MCAUTOJOIN
-IFA_F_NODAD
-IFA_F_NOPREFIXROUTE
-IFA_F_STABLE_PRIVACY
 INIT_PROCESS
 ISOFS_SUPER_MAGIC
 JFFS2_SUPER_MAGIC
@@ -656,6 +650,7 @@ malloc_stats
 malloc_trim
 malloc_usable_size
 mallopt
+mempcpy
 mq_notify
 nl_mmap_hdr
 nl_mmap_req

libc-test/semver/linux.txt

@@ -923,12 +923,18 @@ IFA_ADDRESS
 IFA_ANYCAST
 IFA_BROADCAST
 IFA_CACHEINFO
+IFA_FLAGS
 IFA_F_DADFAILED
 IFA_F_DEPRECATED
 IFA_F_HOMEADDRESS
+IFA_F_MANAGETEMPADDR
+IFA_F_MCAUTOJOIN
+IFA_F_NODAD
+IFA_F_NOPREFIXROUTE
 IFA_F_OPTIMISTIC
 IFA_F_PERMANENT
 IFA_F_SECONDARY
+IFA_F_STABLE_PRIVACY
 IFA_F_TEMPORARY
 IFA_F_TENTATIVE
 IFA_LABEL
@@ -1586,6 +1592,7 @@ MADV_UNMERGEABLE
 MADV_WILLNEED
 MADV_WIPEONFORK
 MAP_DENYWRITE
+MAP_DROPPABLE
 MAP_EXECUTABLE
 MAP_FILE
 MAP_FIXED_NOREPLACE
@@ -2084,40 +2091,67 @@ PF_ASH
 PF_ATMPVC
 PF_ATMSVC
 PF_AX25
+PF_BLOCK_TS
 PF_BLUETOOTH
 PF_BRIDGE
 PF_CAIF
 PF_CAN
 PF_DECnet
+PF_DUMPCORE
 PF_ECONET
+PF_EXITING
+PF_FORKNOEXEC
+PF_IDLE
 PF_IEEE802154
+PF_IO_WORKER
 PF_IPX
 PF_IRDA
 PF_ISDN
 PF_IUCV
 PF_KEY
+PF_KSWAPD
+PF_KTHREAD
 PF_LLC
 PF_LOCAL
+PF_LOCAL_THROTTLE
 PF_MASKOS
 PF_MASKPROC
+PF_MCE_EARLY
+PF_MCE_PROCESS
+PF_MEMALLOC
+PF_MEMALLOC_NOFS
+PF_MEMALLOC_NOIO
+PF_MEMALLOC_PIN
 PF_NETBEUI
 PF_NETLINK
 PF_NETROM
 PF_NFC
+PF_NOFREEZE
+PF_NO_SETAFFINITY
+PF_NPROC_EXCEEDED
 PF_PACKET
 PF_PHONET
+PF_POSTCOREDUMP
 PF_PPPOX
 PF_R
+PF_RANDOMIZE
 PF_RDS
 PF_ROSE
 PF_ROUTE
 PF_RXRPC
 PF_SECURITY
+PF_SIGNALED
 PF_SNA
+PF_SUPERPRIV
+PF_SUSPEND_TASK
 PF_TIPC
+PF_USED_MATH
+PF_USER_WORKER
+PF_VCPU
 PF_VSOCK
 PF_W
 PF_WANPIPE
+PF_WQ_WORKER
 PF_X
 PF_X25
 PIPE_BUF

libc-test/semver/solarish.txt

@@ -16,6 +16,8 @@ LIO_WAIT
 LIO_WRITE
 PIPE_BUF
 SIGEV_PORT
+SIGRTMAX
+SIGRTMIN
 _POSIX_VDISABLE
 _ST_FSTYPSZ
 aio_cancel

libc-test/semver/unix.txt

@@ -638,6 +638,7 @@ localtime_r
 lseek
 lstat
 malloc
+memccpy
 memchr
 memcmp
 memcpy

libc-test/test/sigrt.rs

@@ -4,7 +4,9 @@
     target_os = "linux",
     target_os = "l4re",
     target_os = "android",
-    target_os = "emscripten"
+    target_os = "emscripten",
+    target_os = "solaris",
+    target_os = "illumos",
 ))]
 mod t {
     use libc;

src/fuchsia/mod.rs

@@ -1340,6 +1340,8 @@ cfg_if! {
             }
         }
 
+        // FIXME(msrv): suggested method was added in 1.85
+        #[allow(unpredictable_function_pointer_comparisons)]
         impl PartialEq for sigevent {
             fn eq(&self, other: &sigevent) -> bool {
                 self.sigev_value == other.sigev_value

src/macros.rs

@@ -159,6 +159,13 @@ macro_rules! s_no_extra_traits {
             $(#[$attr])*
             pub union $i { $($field)* }
         }
+
+        #[cfg(feature = "extra_traits")]
+        impl ::core::fmt::Debug for $i {
+            fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
+                f.debug_struct(::core::stringify!($i)).finish_non_exhaustive()
+            }
+        }
     );
 
     (it: $(#[$attr:meta])* pub struct $i:ident { $($field:tt)* }) => (

src/unix/aix/mod.rs

@@ -575,14 +575,6 @@ cfg_if! {
             }
         }
         impl Eq for __sigaction_sa_union {}
-        impl fmt::Debug for __sigaction_sa_union {
-            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                f.debug_struct("__sigaction_sa_union")
-                    .field("__su_handler", unsafe { &self.__su_handler })
-                    .field("__su_sigaction", unsafe { &self.__su_sigaction })
-                    .finish()
-            }
-        }
         impl hash::Hash for __sigaction_sa_union {
             fn hash<H: hash::Hasher>(&self, state: &mut H) {
                 unsafe {
@@ -627,15 +619,6 @@ cfg_if! {
             }
         }
         impl Eq for __poll_ctl_ext_u {}
-        impl fmt::Debug for __poll_ctl_ext_u {
-            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                f.debug_struct("__poll_ctl_ext_u")
-                    .field("addr", unsafe { &self.addr })
-                    .field("data32", unsafe { &self.data32 })
-                    .field("data", unsafe { &self.data })
-                    .finish()
-            }
-        }
         impl hash::Hash for __poll_ctl_ext_u {
             fn hash<H: hash::Hasher>(&self, state: &mut H) {
                 unsafe {