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2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sysdep.h>
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#include <libc-lock.h>
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#include "exit.h"
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#include "set-hooks.h"
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DEFINE_HOOK (__libc_atexit, (void))
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/* Initialize the flag that indicates exit function processing
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is complete. See concurrency notes in stdlib/exit.h where
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__exit_funcs_lock is declared. */
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bool __exit_funcs_done = false;
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/* Call all functions registered with `atexit' and `on_exit',
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in the reverse of the order in which they were registered
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perform stdio cleanup, and terminate program execution with STATUS. */
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void
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attribute_hidden
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__run_exit_handlers (int status, struct exit_function_list **listp,
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bool run_list_atexit, bool run_dtors)
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{
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/* First, call the TLS destructors. */
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#ifndef SHARED
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if (&__call_tls_dtors != NULL)
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#endif
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if (run_dtors)
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__call_tls_dtors ();
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/* We do it this way to handle recursive calls to exit () made by
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the functions registered with `atexit' and `on_exit'. We call
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everyone on the list and use the status value in the last
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exit (). */
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while (true)
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{
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struct exit_function_list *cur;
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__libc_lock_lock (__exit_funcs_lock);
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restart:
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cur = *listp;
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if (cur == NULL)
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{
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/* Exit processing complete. We will not allow any more
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atexit/on_exit registrations. */
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__exit_funcs_done = true;
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__libc_lock_unlock (__exit_funcs_lock);
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break;
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}
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while (cur->idx > 0)
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{
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struct exit_function *const f = &cur->fns[--cur->idx];
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const uint64_t new_exitfn_called = __new_exitfn_called;
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/* Unlock the list while we call a foreign function. */
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__libc_lock_unlock (__exit_funcs_lock);
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switch (f->flavor)
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{
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void (*atfct) (void);
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void (*onfct) (int status, void *arg);
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void (*cxafct) (void *arg, int status);
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case ef_free:
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case ef_us:
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break;
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case ef_on:
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onfct = f->func.on.fn;
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (onfct);
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#endif
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onfct (status, f->func.on.arg);
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break;
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case ef_at:
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atfct = f->func.at;
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (atfct);
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#endif
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atfct ();
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break;
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case ef_cxa:
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/* To avoid dlclose/exit race calling cxafct twice (BZ 22180),
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we must mark this function as ef_free. */
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f->flavor = ef_free;
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cxafct = f->func.cxa.fn;
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (cxafct);
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#endif
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cxafct (f->func.cxa.arg, status);
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break;
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}
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/* Re-lock again before looking at global state. */
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__libc_lock_lock (__exit_funcs_lock);
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if (__glibc_unlikely (new_exitfn_called != __new_exitfn_called))
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/* The last exit function, or another thread, has registered
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more exit functions. Start the loop over. */
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goto restart;
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}
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*listp = cur->next;
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if (*listp != NULL)
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/* Don't free the last element in the chain, this is the statically
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allocate element. */
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free (cur);
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__libc_lock_unlock (__exit_funcs_lock);
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}
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if (run_list_atexit)
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RUN_HOOK (__libc_atexit, ());
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_exit (status);
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}
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void
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exit (int status)
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{
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__run_exit_handlers (status, &__exit_funcs, true, true);
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}
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libc_hidden_def (exit)
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