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h_atexit.c
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h_getopt.c
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h_getopt_long.c
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t_abs.c
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t_atexit.sh
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t_atoi.c
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t_div.c
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t_exit.c
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t_getenv.c
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t_getenv_thread.c
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t_getopt.sh
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t_hsearch.c
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t_mi_vector_hash.c
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t_posix_memalign.c
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t_random.c
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t_strtod.c
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t_strtoi.c
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t_strtol.c
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t_system.c
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Editing: h_atexit.c
/* $NetBSD: h_atexit.c,v 1.1 2011/01/12 19:44:08 pgoyette Exp $ */ /*- * Copyright (c) 2011 The NetBSD Foundation, Inc. * All rights reserved. * * This code was contributed to The NetBSD Foundation by Jason R. Thorpe. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include <sys/cdefs.h> __COPYRIGHT("@(#) Copyright (c) 2011\ The NetBSD Foundation, inc. All rights reserved."); __RCSID("$NetBSD: h_atexit.c,v 1.1 2011/01/12 19:44:08 pgoyette Exp $"); #include <stdio.h> #include <stdlib.h> #include <signal.h> #include <string.h> #include <unistd.h> extern int __cxa_atexit(void (*func)(void *), void *, void *); extern void __cxa_finalize(void *); #ifdef __FreeBSD__ /* * On shared object unload, in __cxa_finalize, call and clear all installed * atexit and __cxa_atexit handlers that are either installed by unloaded * dso, or points to the functions provided by the dso. * * The reason of the change is to ensure that there is no lingering pointers * to the unloaded code after the dlclose(3). It is known reason for infinite * stream of the crash reports for many programs which use loadable modules * and fail to properly clean on module unload. Examples are apache, php, * perl etc. * * You pass the &dso_handle_1 and &dso_handle_2, which points inside the * main binary, to the registration function. The code from r211706, * correctly detects that they are for the main binary, and on the first * call to __cxa_finalize(), which also pass pointer to main binary, all * registered functions from the main binary are executed. */ static void *dso_handle_1 = (void *)1; static void *dso_handle_2 = (void *)2; static void *dso_handle_3 = (void *)3; #else static int dso_handle_1; static int dso_handle_2; static int dso_handle_3; #endif static int arg_1; static int arg_2; static int arg_3; static int exiting_state; #define ASSERT(expr) \ do { \ if ((expr) == 0) { \ write(STDERR_FILENO, __func__, strlen(__func__)); \ write(STDERR_FILENO, ": ", 2); \ write(STDERR_FILENO, __STRING(expr), \ strlen(__STRING(expr))); \ write(STDERR_FILENO, "\n", 1); \ my_abort(); \ } \ } while (/*CONSTCOND*/0) #define SUCCESS() \ do { \ write(STDOUT_FILENO, __func__, strlen(__func__)); \ write(STDOUT_FILENO, "\n", 1); \ } while (/*CONSTCOND*/0) static void my_abort(void) { kill(getpid(), SIGABRT); /* NOTREACHED */ } static void cxa_handler_5(void *arg) { static int cxa_handler_5_called; ASSERT(arg == (void *)&arg_1); ASSERT(cxa_handler_5_called == 0); ASSERT(exiting_state == 5); exiting_state--; cxa_handler_5_called = 1; SUCCESS(); } static void cxa_handler_4(void *arg) { static int cxa_handler_4_called; ASSERT(arg == (void *)&arg_1); ASSERT(cxa_handler_4_called == 0); ASSERT(exiting_state == 4); exiting_state--; cxa_handler_4_called = 1; SUCCESS(); } static void cxa_handler_3(void *arg) { static int cxa_handler_3_called; ASSERT(arg == (void *)&arg_2); ASSERT(cxa_handler_3_called == 0); ASSERT(exiting_state == 3); exiting_state--; cxa_handler_3_called = 1; SUCCESS(); } static void cxa_handler_2(void *arg) { static int cxa_handler_2_called; ASSERT(arg == (void *)&arg_3); ASSERT(cxa_handler_2_called == 0); ASSERT(exiting_state == 2); exiting_state--; cxa_handler_2_called = 1; SUCCESS(); } static void normal_handler_1(void) { static int normal_handler_1_called; ASSERT(normal_handler_1_called == 0); ASSERT(exiting_state == 1); exiting_state--; normal_handler_1_called = 1; SUCCESS(); } static void normal_handler_0(void) { static int normal_handler_0_called; ASSERT(normal_handler_0_called == 0); ASSERT(exiting_state == 0); normal_handler_0_called = 1; SUCCESS(); } int main(int argc, char *argv[]) { exiting_state = 5; ASSERT(0 == atexit(normal_handler_0)); ASSERT(0 == atexit(normal_handler_1)); #ifdef __FreeBSD__ ASSERT(0 == __cxa_atexit(cxa_handler_4, &arg_1, dso_handle_1)); ASSERT(0 == __cxa_atexit(cxa_handler_5, &arg_1, dso_handle_1)); ASSERT(0 == __cxa_atexit(cxa_handler_3, &arg_2, dso_handle_2)); ASSERT(0 == __cxa_atexit(cxa_handler_2, &arg_3, dso_handle_3)); __cxa_finalize(dso_handle_1); __cxa_finalize(dso_handle_2); #else ASSERT(0 == __cxa_atexit(cxa_handler_4, &arg_1, &dso_handle_1)); ASSERT(0 == __cxa_atexit(cxa_handler_5, &arg_1, &dso_handle_1)); ASSERT(0 == __cxa_atexit(cxa_handler_3, &arg_2, &dso_handle_2)); ASSERT(0 == __cxa_atexit(cxa_handler_2, &arg_3, &dso_handle_3)); __cxa_finalize(&dso_handle_1); __cxa_finalize(&dso_handle_2); #endif exit(0); }
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