diff options
Diffstat (limited to 'sysdeps/posix/libc_fatal.c')
| -rw-r--r-- | sysdeps/posix/libc_fatal.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/sysdeps/posix/libc_fatal.c b/sysdeps/posix/libc_fatal.c deleted file mode 100644 index b261963679..0000000000 --- a/sysdeps/posix/libc_fatal.c +++ /dev/null @@ -1,187 +0,0 @@ -/* Catastrophic failure reports. Generic POSIX.1 version. - Copyright (C) 1993-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <atomic.h> -#include <errno.h> -#include <fcntl.h> -#include <ldsodefs.h> -#include <paths.h> -#include <stdarg.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sysdep.h> -#include <unistd.h> -#include <sys/mman.h> -#include <sys/uio.h> -#include <not-cancel.h> - -#ifdef FATAL_PREPARE_INCLUDE -#include FATAL_PREPARE_INCLUDE -#endif - -#ifndef WRITEV_FOR_FATAL -# define WRITEV_FOR_FATAL writev_for_fatal -static bool -writev_for_fatal (int fd, const struct iovec *iov, size_t niov, size_t total) -{ - return TEMP_FAILURE_RETRY (__writev (fd, iov, niov)) == total; -} -#endif - -#ifndef BEFORE_ABORT -# define BEFORE_ABORT before_abort -static void -before_abort (int do_abort __attribute__ ((unused)), - bool written __attribute__ ((unused)), - int fd __attribute__ ((unused))) -{ -} -#endif - -struct str_list -{ - const char *str; - size_t len; - struct str_list *next; -}; - -/* Abort with an error message. */ -void -__libc_message (int do_abort, const char *fmt, ...) -{ - va_list ap; - int fd = -1; - - va_start (ap, fmt); - -#ifdef FATAL_PREPARE - FATAL_PREPARE; -#endif - - /* Open a descriptor for /dev/tty unless the user explicitly - requests errors on standard error. */ - const char *on_2 = __libc_secure_getenv ("LIBC_FATAL_STDERR_"); - if (on_2 == NULL || *on_2 == '\0') - fd = open_not_cancel_2 (_PATH_TTY, O_RDWR | O_NOCTTY | O_NDELAY); - - if (fd == -1) - fd = STDERR_FILENO; - - struct str_list *list = NULL; - int nlist = 0; - - const char *cp = fmt; - while (*cp != '\0') - { - /* Find the next "%s" or the end of the string. */ - const char *next = cp; - while (next[0] != '%' || next[1] != 's') - { - next = __strchrnul (next + 1, '%'); - - if (next[0] == '\0') - break; - } - - /* Determine what to print. */ - const char *str; - size_t len; - if (cp[0] == '%' && cp[1] == 's') - { - str = va_arg (ap, const char *); - len = strlen (str); - cp += 2; - } - else - { - str = cp; - len = next - cp; - cp = next; - } - - struct str_list *newp = alloca (sizeof (struct str_list)); - newp->str = str; - newp->len = len; - newp->next = list; - list = newp; - ++nlist; - } - - bool written = false; - if (nlist > 0) - { - struct iovec *iov = alloca (nlist * sizeof (struct iovec)); - ssize_t total = 0; - - for (int cnt = nlist - 1; cnt >= 0; --cnt) - { - iov[cnt].iov_base = (char *) list->str; - iov[cnt].iov_len = list->len; - total += list->len; - list = list->next; - } - - written = WRITEV_FOR_FATAL (fd, iov, nlist, total); - - if (do_abort) - { - total = ((total + 1 + GLRO(dl_pagesize) - 1) - & ~(GLRO(dl_pagesize) - 1)); - struct abort_msg_s *buf = __mmap (NULL, total, - PROT_READ | PROT_WRITE, - MAP_ANON | MAP_PRIVATE, -1, 0); - if (__glibc_likely (buf != MAP_FAILED)) - { - buf->size = total; - char *wp = buf->msg; - for (int cnt = 0; cnt < nlist; ++cnt) - wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len); - *wp = '\0'; - - /* We have to free the old buffer since the application might - catch the SIGABRT signal. */ - struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg, - buf); - if (old != NULL) - __munmap (old, old->size); - } - } - } - - va_end (ap); - - if (do_abort) - { - BEFORE_ABORT (do_abort, written, fd); - - /* Kill the application. */ - abort (); - } -} - - -void -__libc_fatal (const char *message) -{ - /* The loop is added only to keep gcc happy. */ - while (1) - __libc_message (1, "%s", message); -} -libc_hidden_def (__libc_fatal) |