| 1 | /* Self tests for scoped_mmap for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2018 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | |
| 22 | #include "common/filestuff.h" |
| 23 | #include "common/scoped_mmap.h" |
| 24 | #include "config.h" |
| 25 | |
| 26 | #if defined(HAVE_SYS_MMAN_H) |
| 27 | |
| 28 | #include "selftest.h" |
| 29 | #include "common/gdb_unlinker.h" |
| 30 | |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | namespace selftests { |
| 34 | namespace scoped_mmap { |
| 35 | |
| 36 | /* Test that the file is unmapped. */ |
| 37 | static void |
| 38 | test_destroy () |
| 39 | { |
| 40 | void *mem; |
| 41 | |
| 42 | errno = 0; |
| 43 | { |
| 44 | ::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE, |
| 45 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); |
| 46 | |
| 47 | mem = smmap.get (); |
| 48 | SELF_CHECK (mem != nullptr); |
| 49 | } |
| 50 | |
| 51 | SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == -1 && errno == ENOMEM); |
| 52 | } |
| 53 | |
| 54 | /* Test that the memory can be released. */ |
| 55 | static void |
| 56 | test_release () |
| 57 | { |
| 58 | void *mem; |
| 59 | |
| 60 | errno = 0; |
| 61 | { |
| 62 | ::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE, |
| 63 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); |
| 64 | |
| 65 | mem = smmap.release (); |
| 66 | SELF_CHECK (mem != nullptr); |
| 67 | } |
| 68 | |
| 69 | SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == 0 || errno != ENOMEM); |
| 70 | |
| 71 | munmap (mem, sysconf (_SC_PAGESIZE)); |
| 72 | } |
| 73 | |
| 74 | /* Run selftests. */ |
| 75 | static void |
| 76 | run_tests () |
| 77 | { |
| 78 | test_destroy (); |
| 79 | test_release (); |
| 80 | } |
| 81 | |
| 82 | } /* namespace scoped_mmap */ |
| 83 | |
| 84 | namespace mmap_file |
| 85 | { |
| 86 | |
| 87 | /* Test the standard usage of mmap_file. */ |
| 88 | static void |
| 89 | test_normal () |
| 90 | { |
| 91 | char filename[] = "scoped_mmapped_file-selftest-XXXXXX"; |
| 92 | int fd = gdb_mkostemp_cloexec (filename); |
| 93 | SELF_CHECK (fd >= 0); |
| 94 | |
| 95 | SELF_CHECK (write (fd, "Hello!", 7) == 7); |
| 96 | close (fd); |
| 97 | |
| 98 | gdb::unlinker unlink_test_file (filename); |
| 99 | |
| 100 | { |
| 101 | ::scoped_mmap m = ::mmap_file (filename); |
| 102 | |
| 103 | SELF_CHECK (m.get () != MAP_FAILED); |
| 104 | SELF_CHECK (m.size () == 7); |
| 105 | SELF_CHECK (0 == strcmp ((char *) m.get (), "Hello!")); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | /* Calling mmap_file with a non-existent file should throw an exception. */ |
| 110 | static void |
| 111 | test_invalid_filename () |
| 112 | { |
| 113 | bool threw = false; |
| 114 | |
| 115 | try { |
| 116 | ::scoped_mmap m = ::mmap_file ("/this/file/should/not/exist"); |
| 117 | } catch (gdb_exception &e) { |
| 118 | threw = true; |
| 119 | } |
| 120 | |
| 121 | SELF_CHECK (threw); |
| 122 | } |
| 123 | |
| 124 | |
| 125 | /* Run selftests. */ |
| 126 | static void |
| 127 | run_tests () |
| 128 | { |
| 129 | test_normal (); |
| 130 | test_invalid_filename (); |
| 131 | } |
| 132 | |
| 133 | } /* namespace mmap_file */ |
| 134 | } /* namespace selftests */ |
| 135 | |
| 136 | #endif /* !defined(HAVE_SYS_MMAN_H) */ |
| 137 | |
| 138 | void |
| 139 | _initialize_scoped_mmap_selftests () |
| 140 | { |
| 141 | #if defined(HAVE_SYS_MMAN_H) |
| 142 | selftests::register_test ("scoped_mmap", |
| 143 | selftests::scoped_mmap::run_tests); |
| 144 | selftests::register_test ("mmap_file", |
| 145 | selftests::mmap_file::run_tests); |
| 146 | #endif |
| 147 | } |