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69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* Catastrophic failure reports. Linux version.
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Copyright (C) 1993-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <execinfo.h>
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#include <fcntl.h>
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#include <not-cancel.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/uio.h>
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static bool
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writev_for_fatal (int fd, const struct iovec *iov, size_t niov, size_t total)
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{
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INTERNAL_SYSCALL_DECL (err);
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ssize_t cnt;
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do
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cnt = INTERNAL_SYSCALL (writev, err, 3, fd, iov, niov);
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while (INTERNAL_SYSCALL_ERROR_P (cnt, err)
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&& INTERNAL_SYSCALL_ERRNO (cnt, err) == EINTR);
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return cnt == total;
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}
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#define WRITEV_FOR_FATAL writev_for_fatal
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static void
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backtrace_and_maps (int do_abort, bool written, int fd)
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{
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if (do_abort > 1 && written)
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{
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void *addrs[64];
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#define naddrs (sizeof (addrs) / sizeof (addrs[0]))
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int n = __backtrace (addrs, naddrs);
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if (n > 2)
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{
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#define strnsize(str) str, strlen (str)
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#define writestr(str) write_not_cancel (fd, str)
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writestr (strnsize ("======= Backtrace: =========\n"));
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__backtrace_symbols_fd (addrs + 1, n - 1, fd);
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writestr (strnsize ("======= Memory map: ========\n"));
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int fd2 = open_not_cancel_2 ("/proc/self/maps", O_RDONLY);
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char buf[1024];
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ssize_t n2;
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while ((n2 = read_not_cancel (fd2, buf, sizeof (buf))) > 0)
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if (write_not_cancel (fd, buf, n2) != n2)
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break;
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close_not_cancel_no_status (fd2);
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}
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}
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}
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#define BEFORE_ABORT backtrace_and_maps
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#include <sysdeps/posix/libc_fatal.c>
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