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--- Libc/Libc-1725.40.4/stdlib/FreeBSD/atexit.c
+++ /dev/null
@@ -1,338 +0,0 @@
-/*-
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wimplicit-function-declaration"
-#pragma clang diagnostic ignored "-Wstrict-prototypes"
-#pragma clang diagnostic ignored "-Winvalid-pp-token"
-#pragma clang diagnostic ignored "-Wint-conversion"
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)atexit.c 8.2 (Berkeley) 7/3/94";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdlib/atexit.c,v 1.8 2007/01/09 00:28:09 imp Exp $");
-#include <TargetConditionals.h>
-
-#include "namespace.h"
-#include <errno.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <assert.h>
-#include <pthread.h>
-#if (defined(__DYNAMIC__) || defined (__BLOCKS__)) && !TARGET_OS_DRIVERKIT
-#include <dlfcn.h>
-#endif /* defined(__DYNAMIC__) */
-#include "atexit.h"
-#include "un-namespace.h"
-
-#ifdef __BLOCKS__
-#include <Block.h>
-#include <Block_private.h>
-#endif /* __BLOCKS__ */
-#include "libc_private.h"
-#include <os/alloc_once_private.h>
-
-#define ATEXIT_FN_EMPTY 0
-#define ATEXIT_FN_STD 1
-#define ATEXIT_FN_CXA 2
-#ifdef __BLOCKS__
-#define ATEXIT_FN_BLK 3
-#endif /* __BLOCKS__ */
-
-static pthread_mutex_t atexit_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-#define _MUTEX_LOCK(x) if (__isthreaded) _pthread_mutex_lock(x)
-#define _MUTEX_UNLOCK(x) if (__isthreaded) _pthread_mutex_unlock(x)
-
-struct atexit {
- struct atexit *next; /* next in list */
- int ind; /* next index in this table */
- struct atexit_fn {
- int fn_type; /* ATEXIT_? from above */
- union {
- void (*std_func)(void);
- void (*cxa_func)(void *);
-#ifdef __BLOCKS__
- void (^block)(void);
-#endif /* __BLOCKS__ */
- } fn_ptr; /* function pointer */
- void *fn_arg; /* argument for CXA callback */
- void *fn_dso; /* shared module handle */
- } fns[ATEXIT_SIZE]; /* the table itself */
-};
-
-static struct atexit *__atexit; /* points to head of LIFO stack */
-static int __atexit_new_registration;
-
-__attribute__ ((visibility ("hidden")))
-void
-__atexit_init(void)
-{
- __atexit = os_alloc_once(OS_ALLOC_ONCE_KEY_LIBSYSTEM_C,
- sizeof(struct atexit), NULL);
-}
-
-/*
- * Register the function described by 'fptr' to be called at application
- * exit or owning shared object unload time. This is a helper function
- * for atexit and __cxa_atexit.
- */
-static int
-atexit_register(struct atexit_fn *fptr)
-{
- struct atexit *p = __atexit;
- assert(p);
- _MUTEX_LOCK(&atexit_mutex);
- while (p->ind >= ATEXIT_SIZE) {
- struct atexit *old__atexit;
- old__atexit = __atexit;
- _MUTEX_UNLOCK(&atexit_mutex);
- if ((p = (struct atexit *)malloc(sizeof(*p))) == NULL)
- return (-1);
- _MUTEX_LOCK(&atexit_mutex);
- if (old__atexit != __atexit) {
- /* Lost race, retry operation */
- _MUTEX_UNLOCK(&atexit_mutex);
- free(p);
- _MUTEX_LOCK(&atexit_mutex);
- p = __atexit;
- continue;
- }
- p->ind = 0;
- p->next = __atexit;
- __atexit = p;
- }
- p->fns[p->ind++] = *fptr;
- __atexit_new_registration = 1;
- _MUTEX_UNLOCK(&atexit_mutex);
- return 0;
-}
-
-/*
- * Register a function to be performed at exit.
- */
-int
-atexit(void (*func)(void))
-{
- struct atexit_fn fn;
- int error;
-
- fn.fn_type = ATEXIT_FN_STD;
- fn.fn_ptr.std_func = func;
- fn.fn_arg = NULL;
- fn.fn_dso = NULL;
-
-#if defined(__DYNAMIC__) && !TARGET_OS_IPHONE && !TARGET_OS_DRIVERKIT
- // <rdar://problem/14596032&15173956>
- struct dl_info info;
- if (dladdr(func, &info)) {
- fn.fn_dso = info.dli_fbase;
- }
-#endif
-
- error = atexit_register(&fn);
- return (error);
-}
-
-#ifdef __BLOCKS__
-int
-atexit_b(void (^block)(void))
-{
- struct atexit_fn fn;
- int error;
-
- fn.fn_type = ATEXIT_FN_BLK;
- fn.fn_ptr.block = Block_copy(block);
- fn.fn_arg = NULL;
- fn.fn_dso = NULL;
-
- error = atexit_register(&fn);
- return (error);
-}
-#endif /* __BLOCKS__ */
-
-/*
- * Register a function to be performed at exit or when an shared object
- * with given dso handle is unloaded dynamically.
- */
-int
-__cxa_atexit(void (*func)(void *), void *arg, void *dso)
-{
- struct atexit_fn fn;
- int error;
-
- fn.fn_type = ATEXIT_FN_CXA;
- fn.fn_ptr.cxa_func = func;;
- fn.fn_arg = arg;
- fn.fn_dso = dso;
-
- error = atexit_register(&fn);
- return (error);
-}
-
-static bool
-__cxa_in_range(const struct __cxa_range_t ranges[],
- unsigned int count,
- const void* fn)
-{
- uintptr_t addr = (uintptr_t)fn;
-
-#if __has_feature(ptrauth_calls)
- // Strip the pointer so that range checks work. If we call the pointer, it will
- // still be signed though.
- addr = (uintptr_t)__builtin_ptrauth_strip((void*)addr, ptrauth_key_function_pointer);
-#endif
-
- unsigned int i;
- for (i = 0; i < count; ++i) {
- const struct __cxa_range_t *r = &ranges[i];
- if (addr < (uintptr_t)r->addr) {
- continue;
- }
- if (addr < ((uintptr_t)r->addr + r->length)) {
- return true;
- }
- }
- return false;
-}
-
-/*
- * Call handlers registered via __cxa_atexit/atexit that are in a
- * a range specified.
- * Note: rangeCount==0, means call all handlers.
- */
-void
-__cxa_finalize_ranges(const struct __cxa_range_t ranges[], unsigned int count)
-{
- struct atexit *p;
- struct atexit_fn *fn;
- int n;
- _MUTEX_LOCK(&atexit_mutex);
-
-restart:
- for (p = __atexit; p; p = p->next) {
- for (n = p->ind; --n >= 0;) {
- fn = &p->fns[n];
-
- if (fn->fn_type == ATEXIT_FN_EMPTY) {
- continue; // already been called
- }
-
- // Verify that the entry is within the range being unloaded.
- if (count > 0) {
- if (fn->fn_type == ATEXIT_FN_CXA) {
- // for __cxa_atexit(), call if *dso* is in range be unloaded
- if (!__cxa_in_range(ranges, count, fn->fn_dso)) {
- continue; // not being unloaded yet
- }
- } else if (fn->fn_type == ATEXIT_FN_STD) {
- // for atexit, call if *function* is in range be unloaded
- if (!__cxa_in_range(ranges, count, fn->fn_ptr.std_func)) {
- continue; // not being unloaded yet
- }
-#ifdef __BLOCKS__
- } else if (fn->fn_type == ATEXIT_FN_BLK) {
- // for atexit_b, call if block code is in range be unloaded
- void *a = ((struct Block_layout *)fn->fn_ptr.block)->invoke;
- if (!__cxa_in_range(ranges, count, a)) {
- continue; // not being unloaded yet
- }
-#endif // __BLOCKS__
- }
- }
-
- // Clear the entry to indicate that this handler has been called.
- int fn_type = fn->fn_type;
- fn->fn_type = ATEXIT_FN_EMPTY;
-
- // Detect recursive registrations.
- __atexit_new_registration = 0;
- _MUTEX_UNLOCK(&atexit_mutex);
-
- // Call the handler.
- if (fn_type == ATEXIT_FN_CXA) {
- fn->fn_ptr.cxa_func(fn->fn_arg);
- } else if (fn_type == ATEXIT_FN_STD) {
- fn->fn_ptr.std_func();
-#ifdef __BLOCKS__
- } else if (fn_type == ATEXIT_FN_BLK) {
- fn->fn_ptr.block();
-#endif // __BLOCKS__
- }
-
- // Call any recursively registered handlers.
- _MUTEX_LOCK(&atexit_mutex);
- if (__atexit_new_registration) {
- goto restart;
- }
- }
- }
- _MUTEX_UNLOCK(&atexit_mutex);
-}
-
-
-/*
- * Call all handlers registered with __cxa_atexit for the shared
- * object owning 'dso'. Note: if 'dso' is NULL, then all remaining
- * handlers are called.
- */
-void
-__cxa_finalize(const void *dso)
-{
- if (dso != NULL) {
- // Note: this should not happen as only dyld should be calling
- // this and dyld has switched to call __cxa_finalize_ranges directly.
- struct __cxa_range_t range;
- range.addr = dso;
- range.length = 1;
- __cxa_finalize_ranges(&range, 1);
- } else {
- __cxa_finalize_ranges(NULL, 0);
- }
-}
-
-#if TARGET_OS_OSX
-/*
- * Support for thread_local in C++, using existing _tlv_atexit() in libdyld
- */
-
-void _tlv_atexit(void(*f)(void*), void* arg); /* in libdyld */
-
-void
-__cxa_thread_atexit(void(*f)(void*), void* arg)
-{
- _tlv_atexit(f, arg);
-}
-#endif
-#pragma clang diagnostic pop