Disable stack overflow handler tests on iOS-like platforms

Author: madsmtm

library/std/src/sys/pal/unix/stack_overflow.rs

@@ -491,6 +491,14 @@ mod imp {
     }
 }
 
+// This is intentionally not enabled on iOS/tvOS/watchOS/visionOS, as it uses
+// several symbols that might lead to rejections from the App Store, namely
+// `sigaction`, `sigaltstack`, `sysctlbyname`, `mmap`, `munmap` and `mprotect`.
+//
+// This might be overly cautious, though it is also what Swift does (and they
+// usually have fewer qualms about forwards compatibility, since the runtime
+// is shipped with the OS):
+// <https://github.com/apple/swift/blob/swift-5.10-RELEASE/stdlib/public/runtime/CrashHandlerMacOS.cpp>
 #[cfg(not(any(
     target_os = "linux",
     target_os = "freebsd",

tests/ui/abi/stack-probes-lto.rs

@@ -10,5 +10,9 @@
 //@ compile-flags: -C lto
 //@ no-prefer-dynamic
 //@ ignore-nto Crash analysis impossible at SIGSEGV in QNX Neutrino
+//@ ignore-ios Stack probes are enabled, but the SIGSEGV handler isn't
+//@ ignore-tvos Stack probes are enabled, but the SIGSEGV handler isn't
+//@ ignore-watchos Stack probes are enabled, but the SIGSEGV handler isn't
+//@ ignore-visionos Stack probes are enabled, but the SIGSEGV handler isn't
 
 include!("stack-probes.rs");

tests/ui/abi/stack-probes.rs

@@ -8,6 +8,10 @@
 //@ ignore-sgx no processes
 //@ ignore-fuchsia no exception handler registered for segfault
 //@ ignore-nto Crash analysis impossible at SIGSEGV in QNX Neutrino
+//@ ignore-ios Stack probes are enabled, but the SIGSEGV handler isn't
+//@ ignore-tvos Stack probes are enabled, but the SIGSEGV handler isn't
+//@ ignore-watchos Stack probes are enabled, but the SIGSEGV handler isn't
+//@ ignore-visionos Stack probes are enabled, but the SIGSEGV handler isn't
 
 use std::env;
 use std::mem::MaybeUninit;

tests/ui/runtime/out-of-stack.rs

@@ -7,6 +7,10 @@
 //@ ignore-sgx no processes
 //@ ignore-fuchsia must translate zircon signal to SIGABRT, FIXME (#58590)
 //@ ignore-nto no stack overflow handler used (no alternate stack available)
+//@ ignore-ios stack overflow handlers aren't enabled
+//@ ignore-tvos stack overflow handlers aren't enabled
+//@ ignore-watchos stack overflow handlers aren't enabled
+//@ ignore-visionos stack overflow handlers aren't enabled
 
 #![feature(rustc_private)]