| /* Catastrophic failure reports. Linux version. |
| Copyright (C) 1993-2014 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 <errno.h> |
| #include <execinfo.h> |
| #include <fcntl.h> |
| #include <not-cancel.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| #include <sys/uio.h> |
| |
| static bool |
| writev_for_fatal (int fd, const struct iovec *iov, size_t niov, size_t total) |
| { |
| INTERNAL_SYSCALL_DECL (err); |
| ssize_t cnt; |
| do |
| cnt = INTERNAL_SYSCALL (writev, err, 3, fd, iov, niov); |
| while (INTERNAL_SYSCALL_ERROR_P (cnt, err) |
| && INTERNAL_SYSCALL_ERRNO (cnt, err) == EINTR); |
| return cnt == total; |
| } |
| #define WRITEV_FOR_FATAL writev_for_fatal |
| |
| static void |
| backtrace_and_maps (int do_abort, bool written, int fd) |
| { |
| if (do_abort > 1 && written) |
| { |
| void *addrs[64]; |
| #define naddrs (sizeof (addrs) / sizeof (addrs[0])) |
| int n = __backtrace (addrs, naddrs); |
| if (n > 2) |
| { |
| #define strnsize(str) str, strlen (str) |
| #define writestr(str) write_not_cancel (fd, str) |
| writestr (strnsize ("======= Backtrace: =========\n")); |
| __backtrace_symbols_fd (addrs + 1, n - 1, fd); |
| |
| writestr (strnsize ("======= Memory map: ========\n")); |
| int fd2 = open_not_cancel_2 ("/proc/self/maps", O_RDONLY); |
| char buf[1024]; |
| ssize_t n2; |
| while ((n2 = read_not_cancel (fd2, buf, sizeof (buf))) > 0) |
| if (write_not_cancel (fd, buf, n2) != n2) |
| break; |
| close_not_cancel_no_status (fd2); |
| } |
| } |
| } |
| #define BEFORE_ABORT backtrace_and_maps |
| |
| #include <sysdeps/posix/libc_fatal.c> |
