25b73e6327
abort_handler_s() currently simply calls abort(), though the standard specifies more: "Writes an implementation-defined message to stderr which must include the string pointed to by msg and calls abort()." memset_s() is missing error condition "n > smax", and does not invoke the constraint handler after filling the buffer: "following errors are detected at runtime and call the currently installed constraint handler function after storing ch in every location of the destination range [dest, dest+destsz) if dest and destsz are themselves valid", one of the errors is "n > smax" itself. Submitted by: Yuri Pankov <yuripv@gmx.com> MFC after: 1 week Differential revision: https://reviews.freebsd.org/D11991
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*-
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* Copyright (c) 2017 Juniper Networks. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/types.h>
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#include <machine/atomic.h>
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#include <errno.h>
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#include <pthread.h>
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#include <stddef.h>
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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 "un-namespace.h"
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#include "libc_private.h"
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/*
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* Rationale recommends allocating new memory each time.
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*/
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static constraint_handler_t *_ch = NULL;
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static pthread_mutex_t ch_lock = PTHREAD_MUTEX_INITIALIZER;
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constraint_handler_t
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set_constraint_handler_s(constraint_handler_t handler)
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{
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constraint_handler_t *new, *old, ret;
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new = malloc(sizeof(constraint_handler_t));
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if (new == NULL)
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return (NULL);
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*new = handler;
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if (__isthreaded)
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_pthread_mutex_lock(&ch_lock);
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old = _ch;
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_ch = new;
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if (__isthreaded)
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_pthread_mutex_unlock(&ch_lock);
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if (old == NULL) {
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ret = NULL;
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} else {
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ret = *old;
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free(old);
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}
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return (ret);
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}
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void
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__throw_constraint_handler_s(const char * restrict msg, errno_t error)
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{
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constraint_handler_t ch;
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if (__isthreaded)
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_pthread_mutex_lock(&ch_lock);
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ch = _ch != NULL ? *_ch : NULL;
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if (__isthreaded)
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_pthread_mutex_unlock(&ch_lock);
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if (ch != NULL)
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ch(msg, NULL, error);
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}
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void
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abort_handler_s(const char * restrict msg, void * restrict ptr __unused,
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errno_t error __unused)
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{
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static const char ahs[] = "abort_handler_s : ";
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(void) _write(STDERR_FILENO, ahs, sizeof(ahs) - 1);
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(void) _write(STDERR_FILENO, msg, strlen(msg));
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(void) _write(STDERR_FILENO, "\n", 1);
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abort();
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}
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void
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ignore_handler_s(const char * restrict msg __unused,
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void * restrict ptr __unused, errno_t error __unused)
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{
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}
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