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      1 /*
      2  * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. The name of the author may not be used to endorse or promote products
     14  *    derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "tests.h"
     29 #include <stdio.h>
     30 #include <sys/mman.h>
     31 
     32 #define DEFAULT_STRLEN 32
     33 
     34 static void
     35 print_mincore(const unsigned int pages, void *const addr,
     36 	      const size_t size, unsigned char *const vec)
     37 {
     38 	unsigned int i;
     39 
     40 	if (mincore(addr, size, vec))
     41 		perror_msg_and_skip("mincore");
     42 
     43 	printf("mincore(%p, %zu, [", addr, size);
     44 	for (i = 0; i < pages; ++i) {
     45 		if (i)
     46 			printf(", ");
     47 		if (i >= DEFAULT_STRLEN) {
     48 			printf("...");
     49 			break;
     50 		}
     51 		printf("%u", vec[i] & 1);
     52 	}
     53 	puts("]) = 0");
     54 }
     55 
     56 static void
     57 test_mincore(const unsigned int pages)
     58 {
     59 	const size_t page_size = get_page_size();
     60 	const size_t size = pages * page_size;
     61 	void *const addr = tail_alloc(size);
     62 	unsigned char *const vec = tail_alloc(pages);
     63 
     64 	mincore(addr, size, NULL);
     65 	printf("mincore(%p, %zu, NULL) = -1 %s (%m)\n",
     66 	       addr, size, errno2name());
     67 
     68 	print_mincore(pages, addr, size, vec);
     69 	if (size)
     70 		print_mincore(pages, addr, size - page_size + 1, vec);
     71 }
     72 
     73 int main(void)
     74 {
     75 	test_mincore(1);
     76 	test_mincore(2);
     77 	test_mincore(DEFAULT_STRLEN);
     78 	test_mincore(DEFAULT_STRLEN + 1);
     79 
     80 	puts("+++ exited with 0 +++");
     81 	return 0;
     82 }
     83