diff options
Diffstat (limited to 'src/test/ui/process/process-panic-after-fork.rs')
| -rw-r--r-- | src/test/ui/process/process-panic-after-fork.rs | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/src/test/ui/process/process-panic-after-fork.rs b/src/test/ui/process/process-panic-after-fork.rs deleted file mode 100644 index 6d4d24922..000000000 --- a/src/test/ui/process/process-panic-after-fork.rs +++ /dev/null @@ -1,192 +0,0 @@ -// run-pass -// no-prefer-dynamic -// ignore-wasm32-bare no libc -// ignore-windows -// ignore-sgx no libc -// ignore-emscripten no processes -// ignore-sgx no processes -// ignore-fuchsia no fork - -#![feature(rustc_private)] -#![feature(never_type)] -#![feature(panic_always_abort)] - -extern crate libc; - -use std::alloc::{GlobalAlloc, Layout}; -use std::fmt; -use std::panic::{self, panic_any}; -use std::os::unix::process::{CommandExt, ExitStatusExt}; -use std::process::{self, Command, ExitStatus}; -use std::sync::atomic::{AtomicU32, Ordering}; - -use libc::c_int; - -/// This stunt allocator allows us to spot heap allocations in the child. -struct PidChecking<A> { - parent: A, - require_pid: AtomicU32, -} - -#[global_allocator] -static ALLOCATOR: PidChecking<std::alloc::System> = PidChecking { - parent: std::alloc::System, - require_pid: AtomicU32::new(0), -}; - -impl<A> PidChecking<A> { - fn engage(&self) { - let parent_pid = process::id(); - eprintln!("engaging allocator trap, parent pid={}", parent_pid); - self.require_pid.store(parent_pid, Ordering::Release); - } - fn check(&self) { - let require_pid = self.require_pid.load(Ordering::Acquire); - if require_pid != 0 { - let actual_pid = process::id(); - if require_pid != actual_pid { - unsafe { - libc::raise(libc::SIGUSR1); - } - } - } - } -} - -unsafe impl<A:GlobalAlloc> GlobalAlloc for PidChecking<A> { - unsafe fn alloc(&self, layout: Layout) -> *mut u8 { - self.check(); - self.parent.alloc(layout) - } - - unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) { - self.check(); - self.parent.dealloc(ptr, layout) - } - - unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 { - self.check(); - self.parent.alloc_zeroed(layout) - } - - unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 { - self.check(); - self.parent.realloc(ptr, layout, new_size) - } -} - -fn expect_aborted(status: ExitStatus) { - dbg!(status); - let signal = status.signal().expect("expected child process to die of signal"); - - #[cfg(not(target_os = "android"))] - assert!(signal == libc::SIGABRT || signal == libc::SIGILL || signal == libc::SIGTRAP); - - #[cfg(target_os = "android")] - { - // Android signals an abort() call with SIGSEGV at address 0xdeadbaad - // See e.g. https://groups.google.com/g/android-ndk/c/laW1CJc7Icc - assert!(signal == libc::SIGSEGV); - - // Additional checks performed: - // 1. Find last tombstone (similar to coredump but in text format) from the - // same executable (path) as we are (must be because of usage of fork): - // This ensures that we look into the correct tombstone. - // 2. Cause of crash is a SIGSEGV with address 0xdeadbaad. - // 3. libc::abort call is in one of top two functions on callstack. - // The last two steps distinguish between a normal SIGSEGV and one caused - // by libc::abort. - - let this_exe = std::env::current_exe().unwrap().into_os_string().into_string().unwrap(); - let exe_string = format!(">>> {this_exe} <<<"); - let tombstone = (0..100) - .map(|n| format!("/data/tombstones/tombstone_{n:02}")) - .filter(|f| std::path::Path::new(&f).exists()) - .map(|f| std::fs::read_to_string(&f).expect("Cannot read tombstone file")) - .filter(|f| f.contains(&exe_string)) - .last() - .expect("no tombstone found"); - - println!("Content of tombstone:\n{tombstone}"); - - assert!( - tombstone.contains("signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad") - ); - let abort_on_top = tombstone - .lines() - .skip_while(|l| !l.contains("backtrace:")) - .skip(1) - .take_while(|l| l.starts_with(" #")) - .take(2) - .any(|f| f.contains("/system/lib/libc.so (abort")); - assert!(abort_on_top); - } -} - -fn main() { - ALLOCATOR.engage(); - - fn run(do_panic: &dyn Fn()) -> ExitStatus { - let child = unsafe { libc::fork() }; - assert!(child >= 0); - if child == 0 { - panic::always_abort(); - do_panic(); - process::exit(0); - } - let mut status: c_int = 0; - let got = unsafe { libc::waitpid(child, &mut status, 0) }; - assert_eq!(got, child); - let status = ExitStatus::from_raw(status.into()); - status - } - - fn one(do_panic: &dyn Fn()) { - let status = run(do_panic); - expect_aborted(status); - } - - one(&|| panic!()); - one(&|| panic!("some message")); - one(&|| panic!("message with argument: {}", 42)); - - #[derive(Debug)] - struct Wotsit { } - one(&|| panic_any(Wotsit { })); - - let mut c = Command::new("echo"); - unsafe { - c.pre_exec(|| panic!("{}", "crash now!")); - } - let st = c.status().expect("failed to get command status"); - expect_aborted(st); - - struct DisplayWithHeap; - impl fmt::Display for DisplayWithHeap { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> { - let s = vec![0; 100]; - let s = std::hint::black_box(s); - write!(f, "{:?}", s) - } - } - - // Some panics in the stdlib that we want not to allocate, as - // otherwise these facilities become impossible to use in the - // child after fork, which is really quite awkward. - - one(&|| { None::<DisplayWithHeap>.unwrap(); }); - one(&|| { None::<DisplayWithHeap>.expect("unwrapped a none"); }); - one(&|| { std::str::from_utf8(b"\xff").unwrap(); }); - one(&|| { - let x = [0, 1, 2, 3]; - let y = x[std::hint::black_box(4)]; - let _z = std::hint::black_box(y); - }); - - // Finally, check that our stunt allocator can actually catch an allocation after fork. - // ie, that our test is effective. - - let status = run(&|| panic!("allocating to display... {}", DisplayWithHeap)); - dbg!(status); - assert_eq!(status.signal(), Some(libc::SIGUSR1)); -} |