Add ExitStatusExt::aborted_code for Fuchsia platform

compiler/rustc_feature/src/unstable.rs

@@ -475,6 +475,8 @@ declare_features! (
     (unstable, fn_align, "1.53.0", Some(82232)),
     /// Support delegating implementation of functions to other already implemented functions.
     (incomplete, fn_delegation, "1.76.0", Some(118212)),
+    /// Support ExitStatusExt::aborted_code on Fuchsia platform.
+    (unstable, fuchsia_exit_status_aborted, "1.79.0", None),
     /// Allows impls for the Freeze trait.
     (internal, freeze_impls, "1.78.0", Some(121675)),
     /// Allows defining gen blocks and `gen fn`.

compiler/rustc_span/src/symbol.rs

@@ -931,6 +931,7 @@ symbols! {
         fs_create_dir,
         fsub_algebraic,
         fsub_fast,
+        fuchsia_exit_status_aborted,
         fundamental,
         fused_iterator,
         future,

library/std/src/os/fuchsia/mod.rs

@@ -3,4 +3,6 @@
 #![stable(feature = "raw_ext", since = "1.1.0")]
 
 pub mod fs;
+#[unstable(feature = "fuchsia_exit_status_aborted", issue = "none")]
+pub mod process;
 pub mod raw;

library/std/src/os/fuchsia/process.rs

@@ -0,0 +1,25 @@
+//! Fuchsia-specific extensions to primitives in the [`std::process`] module.
+//!
+//! [`std::process`]: crate::process
+
+use crate::process;
+use crate::sealed::Sealed;
+
+#[unstable(feature = "fuchsia_exit_status_aborted", issue = "none")]
+pub trait ExitStatusExt: Sealed {
+    /// If the process was aborted, returns the status code.
+    #[must_use]
+    fn aborted_code(&self) -> Option<i32>;
+}
+
+#[unstable(feature = "fuchsia_exit_status_aborted", issue = "none")]
+impl ExitStatusExt for process::ExitStatus {
+    /// If the process was aborted, returns the status code.
+    fn aborted_code(&self) -> Option<i32> {
+        match self.code() {
+            // Upon an abort, Fuchsia returns the status code ZX_TASK_RETCODE_EXCEPTION_KILL.
+            code @ Some(-1028) => code,
+            Some(_) | None => None,
+        }
+    }
+}

library/test/src/lib.rs

@@ -23,6 +23,7 @@
 #![feature(process_exitcode_internals)]
 #![feature(panic_can_unwind)]
 #![feature(test)]
+#![cfg_attr(target_os = "fuchsia", feature(fuchsia_exit_status_aborted))]
 #![allow(internal_features)]
 
 // Public reexports

library/test/src/test_result.rs

@@ -1,8 +1,10 @@
 use std::any::Any;
 use std::process::ExitStatus;
 
+#[cfg(target_os = "fuchsia")]
+use std::os::fuchsia::process::ExitStatusExt as _;
 #[cfg(unix)]
-use std::os::unix::process::ExitStatusExt;
+use std::os::unix::process::ExitStatusExt as _;
 
 use super::bench::BenchSamples;
 use super::options::ShouldPanic;
@@ -88,30 +90,30 @@ pub fn get_result_from_exit_code(
     time_opts: &Option<time::TestTimeOptions>,
     exec_time: &Option<time::TestExecTime>,
 ) -> TestResult {
-    let result = match status.code() {
+    #[cfg(target_os = "fuchsia")]
+    let result = status.aborted_code().map(|_| TestResult::TrFailed);
+    #[cfg(not(target_os = "fuchsia"))]
+    let result: Option<TestResult> = None;
+
+    let result = result.unwrap_or_else(|| match status.code() {
         Some(TR_OK) => TestResult::TrOk,
         // On Windows we use __fastfail to abort, which is documented to use this
         // exception code.
         #[cfg(windows)]
         Some(0xC0000409u32 as i32) => TestResult::TrFailed,
-        #[cfg(unix)]
+        #[cfg(any(windows, unix))]
+        Some(code) => TestResult::TrFailedMsg(format!("got unexpected return code {code}")),
+        #[cfg(not(any(windows, unix)))]
+        Some(_) => TestResult::TrFailed,
         None => match status.signal() {
+            #[cfg(unix)]
             Some(libc::SIGABRT) => TestResult::TrFailed,
             Some(signal) => {
                 TestResult::TrFailedMsg(format!("child process exited with signal {signal}"))
             }
             None => unreachable!("status.code() returned None but status.signal() was None"),
         },
-        // Upon an abort, Fuchsia returns the status code ZX_TASK_RETCODE_EXCEPTION_KILL.
-        #[cfg(target_os = "fuchsia")]
-        Some(-1028) => TestResult::TrFailed,
-        #[cfg(not(unix))]
-        None => TestResult::TrFailedMsg(format!("unknown return code")),
-        #[cfg(any(windows, unix))]
-        Some(code) => TestResult::TrFailedMsg(format!("got unexpected return code {code}")),
-        #[cfg(not(any(windows, unix)))]
-        Some(_) => TestResult::TrFailed,
-    };
+    });
 
     // If test is already failed (or allowed to fail), do not change the result.
     if result != TestResult::TrOk {

tests/ui/process/signal-exit-status.rs

@@ -2,20 +2,28 @@
 //@ ignore-wasm32 no processes
 //@ ignore-sgx no processes
 //@ ignore-windows
-//@ ignore-fuchsia code returned as ZX_TASK_RETCODE_EXCEPTION_KILL, FIXME (#58590)
 
 #![feature(core_intrinsics)]
+#![cfg_attr(target_os = "fuchsia", feature(fuchsia_exit_status_aborted))]
 
 use std::env;
 use std::process::Command;
 
+#[cfg(target_os = "fuchsia")]
+use std::os::fuchsia::process::ExitStatusExt;
+
 pub fn main() {
     let args: Vec<String> = env::args().collect();
     if args.len() >= 2 && args[1] == "signal" {
         // Raise an aborting signal without UB
         core::intrinsics::abort();
     } else {
+        // Spawn a child process that will raise an aborting signal
         let status = Command::new(&args[0]).arg("signal").status().unwrap();
+
+        #[cfg(not(target_os = "fuchsia"))]
         assert!(status.code().is_none());
+        #[cfg(target_os = "fuchsia")]
+        assert!(status.aborted_code().is_some());
     }
 }