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@ -1,4 +1,4 @@ |
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/* $OpenBSD: atexit.c,v 1.24 2015/11/10 04:14:03 guenther Exp $ */ |
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/* $OpenBSD: atexit.c,v 1.25 2017/12/05 13:45:31 kettenis Exp $ */ |
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/* |
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* Copyright (c) 2002 Daniel Hartmeier |
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* All rights reserved. |
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@ -31,12 +31,24 @@ |
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#include <sys/types.h> |
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#include <sys/mman.h> |
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#include <dlfcn.h> |
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#include <elf.h> |
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#pragma weak _DYNAMIC |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "atexit.h" |
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#include "atfork.h" |
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#include "thread_private.h" |
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#include "tib.h" |
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typeof(dlctl) dlctl asm("_dlctl") __attribute__((weak)); |
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struct thread_atexit_fn { |
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void (*func)(void *); |
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void *arg; |
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struct thread_atexit_fn *next; |
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}; |
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struct atexit *__atexit; |
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static int restartloop; |
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@ -121,6 +133,43 @@ atexit(void (*fn)(void)) |
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} |
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DEF_STRONG(atexit); |
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__weak_alias(__cxa_thread_atexit, __cxa_thread_atexit_impl); |
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int |
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__cxa_thread_atexit_impl(void (*func)(void *), void *arg, void *dso) |
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{ |
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struct thread_atexit_fn *fnp; |
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struct tib *tib = TIB_GET(); |
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fnp = calloc(1, sizeof(struct thread_atexit_fn)); |
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if (fnp == NULL) |
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return -1; |
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if (_DYNAMIC) |
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dlctl(NULL, DL_REFERENCE, dso); |
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fnp->func = func; |
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fnp->arg = arg; |
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fnp->next = tib->tib_atexit; |
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tib->tib_atexit = fnp; |
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return 0; |
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} |
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DEF_STRONG(__cxa_thread_atexit_impl); |
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void |
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_thread_finalize(void) |
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{ |
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struct tib *tib = TIB_GET(); |
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while (tib->tib_atexit) { |
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struct thread_atexit_fn *fnp = tib->tib_atexit; |
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tib->tib_atexit = fnp->next; |
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fnp->func(fnp->arg); |
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free(fnp); |
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} |
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} |
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/* |
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* Call all handlers registered with __cxa_atexit() for the shared |
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* object owning 'dso'. |
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@ -134,6 +183,9 @@ __cxa_finalize(void *dso) |
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int n, pgsize = getpagesize(); |
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static int call_depth; |
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if (dso == NULL) |
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_thread_finalize(); |
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_ATEXIT_LOCK(); |
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call_depth++; |
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