148 lines
3.1 KiB
C
148 lines
3.1 KiB
C
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/* Self tests for scoped_mmap for GDB, the GNU debugger.
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Copyright (C) 2018-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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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 3 of the License, or
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(at your option) any later version.
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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 the
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GNU General Public License for more details.
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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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbsupport/filestuff.h"
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#include "gdbsupport/scoped_mmap.h"
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#include "config.h"
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#if defined(HAVE_SYS_MMAN_H)
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#include "gdbsupport/selftest.h"
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#include "gdbsupport/gdb_unlinker.h"
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#include <unistd.h>
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namespace selftests {
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namespace scoped_mmap {
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/* Test that the file is unmapped. */
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static void
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test_destroy ()
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{
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void *mem;
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errno = 0;
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{
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::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE,
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MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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mem = smmap.get ();
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SELF_CHECK (mem != nullptr);
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}
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SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == -1 && errno == ENOMEM);
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}
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/* Test that the memory can be released. */
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static void
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test_release ()
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{
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void *mem;
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errno = 0;
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{
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::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE,
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MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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mem = smmap.release ();
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SELF_CHECK (mem != nullptr);
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}
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SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == 0 || errno != ENOMEM);
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munmap (mem, sysconf (_SC_PAGESIZE));
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}
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/* Run selftests. */
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static void
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run_tests ()
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{
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test_destroy ();
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test_release ();
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}
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} /* namespace scoped_mmap */
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namespace mmap_file
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{
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/* Test the standard usage of mmap_file. */
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static void
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test_normal ()
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{
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char filename[] = "scoped_mmapped_file-selftest-XXXXXX";
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int fd = gdb_mkostemp_cloexec (filename);
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SELF_CHECK (fd >= 0);
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SELF_CHECK (write (fd, "Hello!", 7) == 7);
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close (fd);
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gdb::unlinker unlink_test_file (filename);
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{
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::scoped_mmap m = ::mmap_file (filename);
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SELF_CHECK (m.get () != MAP_FAILED);
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SELF_CHECK (m.size () == 7);
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SELF_CHECK (0 == strcmp ((char *) m.get (), "Hello!"));
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}
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}
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/* Calling mmap_file with a non-existent file should throw an exception. */
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static void
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test_invalid_filename ()
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{
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bool threw = false;
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try {
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::scoped_mmap m = ::mmap_file ("/this/file/should/not/exist");
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} catch (gdb_exception &e) {
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threw = true;
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}
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SELF_CHECK (threw);
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}
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/* Run selftests. */
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static void
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run_tests ()
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{
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test_normal ();
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test_invalid_filename ();
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}
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} /* namespace mmap_file */
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} /* namespace selftests */
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#endif /* !defined(HAVE_SYS_MMAN_H) */
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void
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_initialize_scoped_mmap_selftests ()
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{
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#if defined(HAVE_SYS_MMAN_H)
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selftests::register_test ("scoped_mmap",
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selftests::scoped_mmap::run_tests);
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selftests::register_test ("mmap_file",
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selftests::mmap_file::run_tests);
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#endif
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}
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