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/* Self tests for scoped_mmap for GDB, the GNU debugger.
Copyright (C) 2018-2023 Free Software Foundation, Inc.
This file is part of GDB.
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 3 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbsupport/filestuff.h"
#include "gdbsupport/scoped_mmap.h"
#include "config.h"
#if defined(HAVE_SYS_MMAN_H)
#include "gdbsupport/selftest.h"
#include "gdbsupport/gdb_unlinker.h"
#include <unistd.h>
namespace selftests {
namespace scoped_mmap {
/* Test that the file is unmapped. */
static void
test_destroy ()
{
void *mem;
errno = 0;
{
::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
mem = smmap.get ();
SELF_CHECK (mem != nullptr);
}
SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == -1 && errno == ENOMEM);
}
/* Test that the memory can be released. */
static void
test_release ()
{
void *mem;
errno = 0;
{
::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
mem = smmap.release ();
SELF_CHECK (mem != nullptr);
}
SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == 0 || errno != ENOMEM);
munmap (mem, sysconf (_SC_PAGESIZE));
}
/* Run selftests. */
static void
run_tests ()
{
test_destroy ();
test_release ();
}
} /* namespace scoped_mmap */
namespace mmap_file
{
/* Test the standard usage of mmap_file. */
static void
test_normal ()
{
char filename[] = "scoped_mmapped_file-selftest-XXXXXX";
{
scoped_fd fd = gdb_mkostemp_cloexec (filename);
SELF_CHECK (fd.get () >= 0);
SELF_CHECK (write (fd.get (), "Hello!", 7) == 7);
}
gdb::unlinker unlink_test_file (filename);
{
::scoped_mmap m = ::mmap_file (filename);
SELF_CHECK (m.get () != MAP_FAILED);
SELF_CHECK (m.size () == 7);
SELF_CHECK (0 == strcmp ((char *) m.get (), "Hello!"));
}
}
/* Calling mmap_file with a non-existent file should throw an exception. */
static void
test_invalid_filename ()
{
bool threw = false;
try {
::scoped_mmap m = ::mmap_file ("/this/file/should/not/exist");
} catch (gdb_exception &e) {
threw = true;
}
SELF_CHECK (threw);
}
/* Run selftests. */
static void
run_tests ()
{
test_normal ();
test_invalid_filename ();
}
} /* namespace mmap_file */
} /* namespace selftests */
#endif /* !defined(HAVE_SYS_MMAN_H) */
void _initialize_scoped_mmap_selftests ();
void
_initialize_scoped_mmap_selftests ()
{
#if defined(HAVE_SYS_MMAN_H)
selftests::register_test ("scoped_mmap",
selftests::scoped_mmap::run_tests);
selftests::register_test ("mmap_file",
selftests::mmap_file::run_tests);
#endif
}
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