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panic tests: Command: Test that we do not unwind past fork

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This is safe (does not involve heap allocation) but we don't yet have
a test to ensure that stays true.  That will come in a moment.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
Co-authored-by: Mara Bos <m-ou.se@m-ou.se>
This commit is contained in:
Ian Jackson 2021-02-07 11:42:44 +00:00
parent 9283cdca36
commit f8015061c8
1 changed files with 23 additions and 0 deletions
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23
library/std/src/sys/unix/process/process_unix/tests.rs
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@ -1,3 +1,7 @@
use crate::os::unix::process::{CommandExt, ExitStatusExt};
use crate::panic::catch_unwind;
use crate::process::Command;
#[test] #[test]
fn exitstatus_display_tests() { fn exitstatus_display_tests() {
// In practice this is the same on every Unix. // In practice this is the same on every Unix.
@ -28,3 +32,22 @@ fn exitstatus_display_tests() {
t(0x000ff, "unrecognised wait status: 255 0xff"); t(0x000ff, "unrecognised wait status: 255 0xff");
} }
} }
#[test]
fn test_command_fork_no_unwind() {
let got = catch_unwind(|| {
let mut c = Command::new("echo");
c.arg("hi");
unsafe {
c.pre_exec(|| panic!("{}", "crash now!"));
}
let st = c.status().expect("failed to get command status");
dbg!(st);
st
});
dbg!(&got);
let status = got.expect("panic unexpectedly propagated");
dbg!(status);
let signal = status.signal().expect("expected child process to die of signal");
assert!(signal == libc::SIGABRT || signal == libc::SIGILL);
}