125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/*
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* Copyright (c) 2013 FNST, DAN LI <li.dan@cn.fujitsu.com>
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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 MAP_LOCKED works fine.
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* "Lock the pages of the mapped region into memory in the manner of mlock(2)."
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*
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* Expected Result:
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* mmap() should succeed returning the address of the mapped region,
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* and this region should be locked into memory.
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*/
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#include <stdio.h>
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#include <sys/mman.h>
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#include "test.h"
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#define TEMPFILE "mmapfile"
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#define MMAPSIZE (1UL<<20)
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#define LINELEN 256
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char *TCID = "mmap14";
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int TST_TOTAL = 1;
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static char *addr;
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static void getvmlck(unsigned int *lock_sz);
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static void setup(void);
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static void cleanup(void);
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int main(int argc, char *argv[])
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{
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int lc;
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unsigned int sz_before;
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unsigned int sz_after;
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unsigned int sz_ch;
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tst_parse_opts(argc, argv, 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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getvmlck(&sz_before);
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addr = mmap(NULL, MMAPSIZE, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_LOCKED | MAP_ANONYMOUS,
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-1, 0);
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if (addr == MAP_FAILED) {
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tst_resm(TFAIL | TERRNO, "mmap of %s failed", TEMPFILE);
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continue;
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}
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getvmlck(&sz_after);
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sz_ch = sz_after - sz_before;
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if (sz_ch == MMAPSIZE / 1024) {
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tst_resm(TPASS, "Functionality of mmap() "
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"successful");
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} else {
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tst_resm(TFAIL, "Expected %luK locked, "
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"get %uK locked",
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MMAPSIZE / 1024, sz_ch);
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}
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if (munmap(addr, MMAPSIZE) != 0)
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tst_brkm(TFAIL | TERRNO, NULL, "munmap failed");
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}
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cleanup();
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tst_exit();
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}
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void getvmlck(unsigned int *lock_sz)
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{
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int ret;
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char line[LINELEN];
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FILE *fstatus = NULL;
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fstatus = fopen("/proc/self/status", "r");
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if (fstatus == NULL)
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tst_brkm(TFAIL | TERRNO, NULL, "Open dev status failed");
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while (fgets(line, LINELEN, fstatus) != NULL)
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if (strstr(line, "VmLck") != NULL)
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break;
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ret = sscanf(line, "%*[^0-9]%d%*[^0-9]", lock_sz);
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if (ret != 1)
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tst_brkm(TFAIL | TERRNO, NULL, "Get lock size failed");
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fclose(fstatus);
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}
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static void setup(void)
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{
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tst_require_root();
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tst_sig(FORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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}
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static void cleanup(void)
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{
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}
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