From 8c1ab65c0f548d20b7f177bdb736daaf603340e1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 15:54:38 +0200 Subject: Adding upstream version 0.0~git20221206.8b7148f. Signed-off-by: Daniel Baumann --- libc-top-half/musl/src/exit/abort.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 libc-top-half/musl/src/exit/abort.c (limited to 'libc-top-half/musl/src/exit/abort.c') diff --git a/libc-top-half/musl/src/exit/abort.c b/libc-top-half/musl/src/exit/abort.c new file mode 100644 index 0000000..f21f458 --- /dev/null +++ b/libc-top-half/musl/src/exit/abort.c @@ -0,0 +1,30 @@ +#include +#include +#include "syscall.h" +#include "pthread_impl.h" +#include "atomic.h" +#include "lock.h" +#include "ksigaction.h" + +_Noreturn void abort(void) +{ + raise(SIGABRT); + + /* If there was a SIGABRT handler installed and it returned, or if + * SIGABRT was blocked or ignored, take an AS-safe lock to prevent + * sigaction from installing a new SIGABRT handler, uninstall any + * handler that may be present, and re-raise the signal to generate + * the default action of abnormal termination. */ + __block_all_sigs(0); + LOCK(__abort_lock); + __syscall(SYS_rt_sigaction, SIGABRT, + &(struct k_sigaction){.handler = SIG_DFL}, 0, _NSIG/8); + __syscall(SYS_tkill, __pthread_self()->tid, SIGABRT); + __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, + &(long[_NSIG/(8*sizeof(long))]){1UL<<(SIGABRT-1)}, 0, _NSIG/8); + + /* Beyond this point should be unreachable. */ + a_crash(); + raise(SIGKILL); + _Exit(127); +} -- cgit v1.2.3