Add aarch64-apple-ios to platform-check matrix

This commit is somewhat of a rebase of bytecodealliance#7506 to port most of it to
`main`. I've left out any test-related changes since we're not testing
anything just yet. I've also found that rustc now has
`target_vendor = "apple"` to cover both macOS and iOS targets (and
presumably other targets like tvOS as well if they get added)

Closes bytecodealliance#7506

.github/workflows/main.yml

@@ -553,6 +553,9 @@ jobs:
         - target: wasm32-wasip1
           os: ubuntu-latest
           test: cargo build --no-default-features --features compile,cranelift,all-arch
+        - target: aarch64-apple-ios
+          os: macos-latest
+          test: cargo build
     steps:
     - uses: actions/checkout@v4
       with:

crates/asm-macros/src/lib.rs

@@ -9,7 +9,7 @@
 #![no_std]
 
 cfg_if::cfg_if! {
-    if #[cfg(target_os = "macos")] {
+    if #[cfg(target_vendor = "apple")] {
         #[macro_export]
         macro_rules! asm_func {
             ($name:expr, $body:expr $(, $($args:tt)*)?) => {

crates/fiber/src/stackswitch/aarch64.rs

@@ -22,7 +22,7 @@ use super::wasmtime_fiber_start;
 use wasmtime_asm_macros::asm_func;
 
 cfg_if::cfg_if! {
-    if #[cfg(target_os = "macos")] {
+    if #[cfg(target_vendor = "apple")] {
         macro_rules! paci1716 { () => ("pacib1716\n"); }
         macro_rules! pacisp { () => ("pacibsp\n"); }
         macro_rules! autisp { () => ("autibsp\n"); }

crates/jit-icache-coherence/Cargo.toml

@@ -24,7 +24,7 @@ features = [
     "Win32_System_Diagnostics_Debug",
 ]
 
-[target.'cfg(any(target_os = "linux", target_os = "macos", target_os = "freebsd", target_os = "android"))'.dependencies]
+[target.'cfg(any(target_os = "linux", target_vendor = "apple", target_os = "freebsd", target_os = "android"))'.dependencies]
 libc = { workspace = true }
 
 [features]

crates/wasmtime/Cargo.toml

@@ -89,7 +89,7 @@ ittapi = { workspace = true, optional = true }
 [target.'cfg(target_os = "linux")'.dependencies]
 memfd = { workspace = true, optional = true }
 
-[target.'cfg(target_os = "macos")'.dependencies]
+[target.'cfg(target_vendor = "apple")'.dependencies]
 mach2 = { workspace = true, optional = true }
 
 [target.'cfg(unix)'.dependencies]

crates/wasmtime/src/runtime/vm/sys/unix/mod.rs

@@ -12,7 +12,7 @@ pub mod unwind;
 #[cfg(feature = "signals-based-traps")]
 pub mod vm;
 
-#[cfg(all(feature = "signals-based-traps", target_os = "macos"))]
+#[cfg(all(feature = "signals-based-traps", target_vendor = "apple"))]
 pub mod machports;
 #[cfg(feature = "signals-based-traps")]
 pub mod signals;

crates/wasmtime/src/runtime/vm/sys/unix/signals.rs

@@ -31,7 +31,7 @@ impl TrapHandler {
     pub unsafe fn new(macos_use_mach_ports: bool) -> TrapHandler {
         // Either mach ports shouldn't be in use or we shouldn't be on macOS,
         // otherwise the `machports.rs` module should be used instead.
-        assert!(!macos_use_mach_ports || !cfg!(target_os = "macos"));
+        assert!(!macos_use_mach_ports || !cfg!(target_vendor = "apple"));
 
         foreach_handler(|slot, signal| {
             let mut handler: libc::sigaction = mem::zeroed();
@@ -63,7 +63,7 @@ impl TrapHandler {
     }
 
     pub fn validate_config(&self, macos_use_mach_ports: bool) {
-        assert!(!macos_use_mach_ports || !cfg!(target_os = "macos"));
+        assert!(!macos_use_mach_ports || !cfg!(target_vendor = "apple"));
     }
 }
 
@@ -81,7 +81,7 @@ unsafe fn foreach_handler(mut f: impl FnMut(*mut libc::sigaction, i32)) {
 
     // Sometimes we need to handle SIGBUS too:
     // - On Darwin, guard page accesses are raised as SIGBUS.
-    if cfg!(target_os = "macos") || cfg!(target_os = "freebsd") {
+    if cfg!(target_vendor = "apple") || cfg!(target_os = "freebsd") {
         f(addr_of_mut!(PREV_SIGBUS), libc::SIGBUS);
     }
 
@@ -209,7 +209,7 @@ unsafe extern "C" fn trap_handler(
         // done running" which will clear the sigaltstack flag and allow
         // reusing it for the next signal. Then upon resuming in our custom
         // code we blow away the stack anyway with a longjmp.
-        if cfg!(target_os = "macos") {
+        if cfg!(target_vendor = "apple") {
             unsafe extern "C" fn wasmtime_longjmp_shim(jmp_buf: *const u8) {
                 wasmtime_longjmp(jmp_buf)
             }
@@ -303,13 +303,13 @@ unsafe fn get_trap_registers(cx: *mut libc::c_void, _signum: libc::c_int) -> Tra
                 pc: (cx.uc_mcontext.psw.addr - trap_offset) as usize,
                 fp: *(cx.uc_mcontext.gregs[15] as *const usize),
             }
-        } else if #[cfg(all(target_os = "macos", target_arch = "x86_64"))] {
+        } else if #[cfg(all(target_vendor = "apple", target_arch = "x86_64"))] {
             let cx = &*(cx as *const libc::ucontext_t);
             TrapRegisters {
                 pc: (*cx.uc_mcontext).__ss.__rip as usize,
                 fp: (*cx.uc_mcontext).__ss.__rbp as usize,
             }
-        } else if #[cfg(all(target_os = "macos", target_arch = "aarch64"))] {
+        } else if #[cfg(all(target_vendor = "apple", target_arch = "aarch64"))] {
             let cx = &*(cx as *const libc::ucontext_t);
             TrapRegisters {
                 pc: (*cx.uc_mcontext).__ss.__pc as usize,
@@ -358,7 +358,7 @@ unsafe fn get_trap_registers(cx: *mut libc::c_void, _signum: libc::c_int) -> Tra
 // See more comments above where this is called for what it's doing.
 unsafe fn set_pc(cx: *mut libc::c_void, pc: usize, arg1: usize) {
     cfg_if::cfg_if! {
-        if #[cfg(not(target_os = "macos"))] {
+        if #[cfg(not(target_vendor = "apple"))] {
             let _ = (cx, pc, arg1);
             unreachable!(); // not used on these platforms
         } else if #[cfg(target_arch = "x86_64")] {
@@ -382,7 +382,7 @@ unsafe fn set_pc(cx: *mut libc::c_void, pc: usize, arg1: usize) {
             (*cx.uc_mcontext).__ss.__pc = pc as u64;
             (*cx.uc_mcontext).__ss.__x[0] = arg1 as u64;
         } else {
-            compile_error!("unsupported macos target architecture");
+            compile_error!("unsupported apple target architecture");
         }
     }
 }