157 lines
3.6 KiB
C
157 lines
3.6 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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
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* the GNU General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Test Description:
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* Verify that,
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* 1. munmap() fails with -1 return value and sets errno to EINVAL
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* if addresses in the range [addr,addr+len) are outside the valid
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* range for the address space of a process.
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* 2. munmap() fails with -1 return value and sets errno to EINVAL
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* if the len argument is 0.
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* 3. munmap() fails with -1 return value and sets errno to EINVAL
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* if the addr argument is not a multiple of the page size as
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* returned by sysconf().
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include "test.h"
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#include "safe_macros.h"
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char *TCID = "munmap03";
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static size_t page_sz;
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static char *global_addr;
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static size_t global_maplen;
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static void setup(void);
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static void cleanup(void);
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static void test_einval1(void);
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static void test_einval2(void);
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static void test_einval3(void);
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static void (*testfunc[])(void) = { test_einval1, test_einval2, test_einval3 };
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int TST_TOTAL = ARRAY_SIZE(testfunc);
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int main(int ac, char **av)
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{
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int i, lc;
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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for (i = 0; i < TST_TOTAL; i++)
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(*testfunc[i])();
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}
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cleanup();
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tst_exit();
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}
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static void setup(void)
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{
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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page_sz = (size_t)sysconf(_SC_PAGESIZE);
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global_maplen = page_sz * 2;
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global_addr = SAFE_MMAP(cleanup, NULL, global_maplen, PROT_READ |
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PROT_WRITE, MAP_PRIVATE_EXCEPT_UCLINUX |
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MAP_ANONYMOUS, -1, 0);
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}
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static void check_and_print(int expected_errno)
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{
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if (TEST_RETURN == -1) {
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if (TEST_ERRNO == expected_errno) {
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tst_resm(TPASS | TTERRNO, "failed as expected");
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} else {
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tst_resm(TFAIL | TTERRNO,
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"failed unexpectedly; expected - %d : %s",
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expected_errno, strerror(expected_errno));
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}
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} else {
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tst_resm(TFAIL, "munmap succeeded unexpectedly");
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}
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}
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static void test_einval1(void)
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{
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struct rlimit brkval;
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char *addr;
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size_t map_len;
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SAFE_GETRLIMIT(cleanup, RLIMIT_DATA, &brkval);
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addr = (char *)brkval.rlim_max;
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map_len = page_sz * 2;
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TEST(munmap(addr, map_len));
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check_and_print(EINVAL);
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}
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static void test_einval2(void)
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{
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char *addr = global_addr;
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size_t map_len = 0;
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if (tst_kvercmp(2, 6, 12) < 0) {
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tst_resm(TCONF,
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"EINVAL error value test for this condition needs "
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"kernel 2.6.12 or higher");
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return;
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}
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TEST(munmap(addr, map_len));
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check_and_print(EINVAL);
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}
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static void test_einval3(void)
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{
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char *addr = (char *)(global_addr + 1);
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size_t map_len = page_sz;
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TEST(munmap(addr, map_len));
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check_and_print(EINVAL);
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}
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static void cleanup(void)
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{
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if (munmap(global_addr, global_maplen) == -1)
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tst_resm(TWARN | TERRNO, "munmap failed");
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}
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