78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/* Copyright 2015-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <assert.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <string.h>
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static void *
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do_mmap (void *addr, size_t size, int prot, int flags, int fd, off_t offset)
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{
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void *ret = mmap (addr, size, prot, flags, fd, offset);
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assert (ret != NULL);
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return ret;
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}
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int
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main (int argc, char *argv[])
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{
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const size_t size = 10;
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const int default_prot = PROT_READ | PROT_WRITE;
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char *private_anon, *shared_anon;
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char *dont_dump;
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int i;
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private_anon = do_mmap (NULL, size, default_prot,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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memset (private_anon, 0x11, size);
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shared_anon = do_mmap (NULL, size, default_prot,
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MAP_SHARED | MAP_ANONYMOUS, -1, 0);
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memset (shared_anon, 0x22, size);
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dont_dump = do_mmap (NULL, size, default_prot,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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memset (dont_dump, 0x55, size);
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i = madvise (dont_dump, size, MADV_DONTDUMP);
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assert_perror (errno);
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assert (i == 0);
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return 0; /* break-here */
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}
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/* Write V to /proc/self/coredump_filter. Return 0 on success. */
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int
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set_coredump_filter (int v)
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{
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FILE *f = fopen("/proc/self/coredump_filter", "r+");
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if (f == NULL)
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return 1;
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fprintf(f, "%#x", v);
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fclose (f);
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return 0;
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}
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