From 46432be2f1d4de962b51ca6b9f80fc37744be9f7 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Tue, 19 Dec 2023 09:55:25 -0800 Subject: tst-setcontext10.c: Undef _FORTIFY_SOURCE When _FORTIFY_SOURCE is defined to 2, ____longjmp_chk is called, instead of longjmp. ____longjmp_chk compares the relative stack values to decide if it is called from a stack frame which called setjmp. If not, ____longjmp_chk assumes that an alternate signal stack is used. Since comparing the relative stack values isn't reliable with user context, when there is no signal, ____longjmp_chk will fail. Undefine _FORTIFY_SOURCE to avoid ____longjmp_chk in user context test. --- stdlib/tst-setcontext10.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/stdlib/tst-setcontext10.c b/stdlib/tst-setcontext10.c index 2926753cb1..d714563742 100644 --- a/stdlib/tst-setcontext10.c +++ b/stdlib/tst-setcontext10.c @@ -16,6 +16,15 @@ License along with the GNU C Library; if not, see . */ +/* When _FORTIFY_SOURCE is defined to 2, ____longjmp_chk is called, + instead of longjmp. ____longjmp_chk compares the relative stack + values to decide if it is called from a stack frame which called + setjmp. If not, ____longjmp_chk assumes that an alternate signal + stack is used. Since comparing the relative stack values isn't + reliable with user context, when there is no signal, ____longjmp_chk + will fail. Undefine _FORTIFY_SOURCE to avoid ____longjmp_chk. */ +#undef _FORTIFY_SOURCE + #include #include #include -- cgit 1.4.1