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* stdlib/cxa_finalize.c (__cxa_finalize): Fix race condition when 

calling registered handler.
This commit is contained in:
Ulrich Drepper 2006-07-26 06:44:46 +00:00
parent a08336fb91
commit bd3754dcf6
2 changed files with 17 additions and 10 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2006-07-25 Ulrich Drepper <drepper@redhat.com>
* stdlib/cxa_finalize.c (__cxa_finalize): Fix race condition when
calling registered handler.
* sysdeps/unix/sysv/linux/sparc/bits/fcntl.h: Fix comment.
* sysdeps/unix/sysv/linux/ia64/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/sh/bits/fcntl.h: Likewise.

24
stdlib/cxa_finalize.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1999, 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
/* Copyright (C) 1999,2001,2002,2003,2005,2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -36,17 +36,21 @@ __cxa_finalize (void *d)
struct exit_function *f;
for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
if ((d == NULL || d == f->func.cxa.dso_handle)
/* We don't want to run this cleanup more than once. */
&& ! atomic_compare_and_exchange_bool_acq (&f->flavor, ef_free,
ef_cxa))
{
void (*cxafn) (void *arg, int status) = f->func.cxa.fn;
{
void (*cxafn) (void *arg, int status);
if ((d == NULL || d == f->func.cxa.dso_handle)
/* We don't want to run this cleanup more than once. */
&& (cxafn = f->func.cxa.fn,
! atomic_compare_and_exchange_bool_acq (&f->flavor, ef_free,
ef_cxa)))
{
#ifdef PTR_DEMANGLE
PTR_DEMANGLE (cxafn);
PTR_DEMANGLE (cxafn);
#endif
cxafn (f->func.cxa.arg, 0);
}
cxafn (f->func.cxa.arg, 0);
}
}
}
/* Remove the registered fork handlers. We do not have to