diff options
Diffstat (limited to 'stdlib/exit.c')
| -rw-r--r-- | stdlib/exit.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/stdlib/exit.c b/stdlib/exit.c index 5166c78044..bbaf138806 100644 --- a/stdlib/exit.c +++ b/stdlib/exit.c @@ -132,9 +132,17 @@ __run_exit_handlers (int status, struct exit_function_list **listp, } +/* The lock handles concurrent exit(), even though the C/POSIX standard states + that calling exit() more than once is UB. The recursive lock allows + atexit() handlers or destructors to call exit() itself. In this case, the + handler list execution will resume at the point of the current handler. */ +__libc_lock_define_initialized_recursive (static, __exit_lock) + void exit (int status) { + /* The exit should never return, so there is no need to unlock it. */ + __libc_lock_lock_recursive (__exit_lock); __run_exit_handlers (status, &__exit_funcs, true, true); } libc_hidden_def (exit) |