| /* |
| * Copyright (c) International Business Machines Corp., 2004 |
| * Copyright (c) Linux Test Project, 2013-2014 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * This is a test for the madvise(2) system call. It is intended |
| * to provide a complete exposure of the system call. It tests |
| * madvise(2) for all error conditions to occur correctly. |
| * |
| * (A) Test Case for EINVAL |
| * 1. start is not page-aligned |
| * 2. advice is not a valid value |
| * 3. application is attempting to release |
| * locked or shared pages (with MADV_DONTNEED) |
| * 4. MADV_MERGEABLE or MADV_UNMERGEABLE was specified in advice, |
| * but the kernel was not configured with CONFIG_KSM. |
| * |
| * (B) Test Case for ENOMEM |
| * 5. addresses in the specified range are not currently mapped |
| * or are outside the address space of the process |
| * b. Not enough memory - paging in failed |
| * |
| * (C) Test Case for EBADF |
| * 6. the map exists, |
| * but the area maps something that isn't a file. |
| */ |
| |
| #include <sys/types.h> |
| #include <sys/mman.h> |
| #include <sys/resource.h> |
| #include <sys/stat.h> |
| #include <sys/time.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| #define TEST_FILE "testfile" |
| #define STR "abcdefghijklmnopqrstuvwxyz12345\n" |
| |
| #define KSM_SYS_DIR "/sys/kernel/mm/ksm" |
| |
| static void setup(void); |
| static void cleanup(void); |
| static void check_and_print(int expected_errno); |
| |
| static void test_addr_einval(void); |
| static void test_advice_einval(void); |
| #if !defined(UCLINUX) |
| static void test_lock_einval(void); |
| #endif /* if !defined(UCLINUX) */ |
| #if defined(MADV_MERGEABLE) |
| static void test_mergeable_einval(void); |
| #endif |
| #if defined(MADV_UNMERGEABLE) |
| static void test_unmergeable_einval(void); |
| #endif |
| static void test_enomem(void); |
| static void test_ebadf(void); |
| |
| static void (*test_func[])(void) = { |
| test_addr_einval, |
| test_advice_einval, |
| #if !defined(UCLINUX) |
| test_lock_einval, |
| #endif /* if !defined(UCLINUX) */ |
| #if defined(MADV_MERGEABLE) |
| test_mergeable_einval, |
| #endif |
| #if defined(MADV_UNMERGEABLE) |
| test_unmergeable_einval, |
| #endif |
| test_enomem, |
| test_ebadf, |
| }; |
| |
| char *TCID = "madvise02"; |
| int TST_TOTAL = ARRAY_SIZE(test_func); |
| |
| static int fd; |
| static struct stat st; |
| static int pagesize; |
| |
| int main(int argc, char *argv[]) |
| { |
| int lc; |
| int i; |
| const char *msg = NULL; |
| |
| msg = parse_opts(argc, argv, NULL, NULL); |
| if (msg != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| |
| for (i = 0; i < TST_TOTAL; i++) |
| (*test_func[i])(); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| int i; |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| fd = SAFE_OPEN(cleanup, TEST_FILE, O_RDWR | O_CREAT, 0664); |
| |
| pagesize = getpagesize(); |
| |
| /* Writing 16 pages of random data into this file */ |
| for (i = 0; i < (pagesize / 2); i++) |
| SAFE_WRITE(cleanup, 1, fd, STR, sizeof(STR) - 1); |
| |
| SAFE_FSTAT(cleanup, fd, &st); |
| } |
| |
| static void cleanup(void) |
| { |
| if (fd && close(fd) < 0) |
| tst_resm(TWARN | TERRNO, "close failed"); |
| |
| tst_rmdir(); |
| } |
| |
| static void check_and_print(int expected_errno) |
| { |
| if (TEST_RETURN == -1) { |
| if (TEST_ERRNO == expected_errno) |
| tst_resm(TPASS | TTERRNO, "failed as expected"); |
| else |
| tst_resm(TFAIL | TTERRNO, |
| "failed unexpectedly; expected - %d : %s", |
| expected_errno, strerror(expected_errno)); |
| } else { |
| tst_resm(TFAIL, "madvise succeeded unexpectedly"); |
| } |
| } |
| |
| static void test_addr_einval(void) |
| { |
| char *file; |
| |
| file = SAFE_MMAP(cleanup, 0, st.st_size, PROT_READ, |
| MAP_SHARED, fd, 0); |
| |
| TEST(madvise(file + 100, st.st_size, MADV_NORMAL)); |
| check_and_print(EINVAL); |
| |
| SAFE_MUNMAP(cleanup, file, st.st_size); |
| } |
| |
| static void test_advice_einval(void) |
| { |
| char *file; |
| |
| file = SAFE_MMAP(cleanup, 0, st.st_size, PROT_READ, |
| MAP_SHARED, fd, 0); |
| |
| TEST(madvise(file, st.st_size, 1212)); |
| check_and_print(EINVAL); |
| |
| SAFE_MUNMAP(cleanup, file, st.st_size); |
| } |
| |
| #if !defined(UCLINUX) |
| static void test_lock_einval(void) |
| { |
| char *file; |
| |
| file = SAFE_MMAP(cleanup, 0, st.st_size, PROT_READ, |
| MAP_SHARED, fd, 0); |
| |
| if (mlock(file, st.st_size) < 0) |
| tst_brkm(TBROK | TERRNO, cleanup, "mlock failed"); |
| |
| TEST(madvise(file, st.st_size, MADV_DONTNEED)); |
| check_and_print(EINVAL); |
| |
| SAFE_MUNMAP(cleanup, file, st.st_size); |
| } |
| #endif /* if !defined(UCLINUX) */ |
| |
| #if defined(MADV_MERGEABLE) |
| static void test_mergeable_einval(void) |
| { |
| char *file; |
| |
| if (access(KSM_SYS_DIR, F_OK) >= 0) { |
| tst_resm(TCONF, "kernel configured with CONFIG_KSM, " |
| "skip EINVAL test for MADV_MERGEABLE."); |
| return; |
| } |
| |
| file = SAFE_MMAP(cleanup, 0, st.st_size, PROT_READ, |
| MAP_SHARED, fd, 0); |
| |
| TEST(madvise(file, st.st_size, MADV_MERGEABLE)); |
| check_and_print(EINVAL); |
| |
| SAFE_MUNMAP(cleanup, file, st.st_size); |
| } |
| #endif |
| |
| #if defined(MADV_UNMERGEABLE) |
| static void test_unmergeable_einval(void) |
| { |
| char *file; |
| |
| if (access(KSM_SYS_DIR, F_OK) >= 0) { |
| tst_resm(TCONF, "kernel configured with CONFIG_KSM, " |
| "skip EINVAL test for MADV_UNMERGEABLE."); |
| return; |
| } |
| |
| file = SAFE_MMAP(cleanup, 0, st.st_size, PROT_READ, |
| MAP_SHARED, fd, 0); |
| |
| TEST(madvise(file, st.st_size, MADV_UNMERGEABLE)); |
| check_and_print(EINVAL); |
| |
| SAFE_MUNMAP(cleanup, file, st.st_size); |
| } |
| #endif |
| |
| static void test_enomem(void) |
| { |
| char *low; |
| char *high; |
| unsigned long len; |
| |
| low = SAFE_MMAP(cleanup, 0, st.st_size / 2, PROT_READ, |
| MAP_SHARED, fd, 0); |
| |
| high = SAFE_MMAP(cleanup, 0, st.st_size / 2, PROT_READ, |
| MAP_SHARED, fd, st.st_size / 2); |
| |
| /* Swap if necessary to make low < high */ |
| if (low > high) { |
| char *tmp; |
| tmp = high; |
| high = low; |
| low = tmp; |
| } |
| |
| len = (high - low) + pagesize; |
| |
| SAFE_MUNMAP(cleanup, high, st.st_size / 2); |
| |
| TEST(madvise(low, len, MADV_NORMAL)); |
| check_and_print(ENOMEM); |
| |
| SAFE_MUNMAP(cleanup, low, st.st_size / 2); |
| } |
| |
| static void test_ebadf(void) |
| { |
| char *ptr_memory_allocated = NULL; |
| char *tmp_memory_allocated = NULL; |
| |
| /* Create one memory segment using malloc */ |
| ptr_memory_allocated = malloc(5 * pagesize); |
| /* |
| * Take temporary pointer for later use, freeing up the |
| * original one. |
| */ |
| tmp_memory_allocated = ptr_memory_allocated; |
| tmp_memory_allocated = |
| (char *)(((unsigned long)tmp_memory_allocated + |
| pagesize - 1) & ~(pagesize - 1)); |
| |
| TEST(madvise(tmp_memory_allocated, 5 * pagesize, MADV_WILLNEED)); |
| if (tst_kvercmp(3, 9, 0) < 0) { |
| check_and_print(EBADF); |
| /* in kernel commit 1998cc0, madvise(MADV_WILLNEED) to anon |
| * mem doesn't return -EBADF now, as now we support swap |
| * prefretch. |
| */ |
| } else { |
| tst_resm(TPASS, "madvise succeeded as expected, see " |
| "kernel commit 1998cc0 for details."); |
| } |
| |
| free(ptr_memory_allocated); |
| } |