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Fix BZ 14333

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This commit is contained in:
Paul Pluzhnikov
2017-09-20 09:31:48 -07:00
parent 0525ce4850
commit 26e70aec70
11 changed files with 285 additions and 39 deletions
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19
stdlib/exit.h
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@ -20,6 +20,7 @@
#include <stdbool.h>
#include <stdint.h>
#include <libc-lock.h>
enum
{
@ -57,11 +58,27 @@ struct exit_function_list
size_t idx;
struct exit_function fns[32];
};
extern struct exit_function_list *__exit_funcs attribute_hidden;
extern struct exit_function_list *__quick_exit_funcs attribute_hidden;
extern uint64_t __new_exitfn_called attribute_hidden;
/* True once all registered atexit/at_quick_exit/onexit handlers have been
called */
extern bool __exit_funcs_done attribute_hidden;
/* This lock protects __exit_funcs, __quick_exit_funcs, __exit_funcs_done
and __new_exitfn_called globals against simultaneous access from
atexit/on_exit/at_quick_exit in multiple threads, and also from
simultaneous access while another thread is in the middle of calling
exit handlers. See BZ#14333. Note: for lists, the entire list, and
each associated entry in the list, is protected for all access by this
lock. */
__libc_lock_define (extern, __exit_funcs_lock);
extern struct exit_function *__new_exitfn (struct exit_function_list **listp);
extern uint64_t __new_exitfn_called attribute_hidden;
extern void __run_exit_handlers (int status,
struct exit_function_list **listp,