From c6af8a9a3ce137a9704825d173be22a2b2d9cb49 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Mon, 5 Aug 2024 11:27:35 -0300 Subject: stdlib: Allow concurrent quick_exit (BZ 31997) As for exit, also allows concurrent quick_exit to avoid race conditions when it is called concurrently. Since it uses the same internal function as exit, the __exit_lock lock is moved to __run_exit_handlers. It also solved a potential concurrent when calling exit and quick_exit concurrently. The test case 'expected' is expanded to a value larger than the minimum required by C/POSIX (32 entries) so at_quick_exit() will require libc to allocate a new block. This makes the test mre likely to trigger concurrent issues (through free() at __run_exit_handlers) if quick_exit() interacts with the at_quick_exit list concurrently. This is also the latest interpretation of the Austin Ticket [1]. Checked on x86_64-linux-gnu. [1] https://austingroupbugs.net/view.php?id=1845 Reviewed-by: Carlos O'Donell --- stdlib/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'stdlib/Makefile') diff --git a/stdlib/Makefile b/stdlib/Makefile index f659c38feb..043a452f72 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -274,6 +274,7 @@ tests := \ tst-bz20544 \ tst-canon-bz26341 \ tst-concurrent-exit \ + tst-concurrent-quick_exit \ tst-cxa_atexit \ tst-environ \ tst-getrandom \ -- cgit v1.2.3