espressif/binutils-gdb
1
0
Fork 0
mirror of https://github.com/espressif/binutils-gdb.git synced 2025-08-06 06:45:56 +08:00
Code Issues Packages Projects Releases Wiki Activity

common: add scoped_mmap

Browse Source 
Add a simple helper to automatically unmap a memory mapping.

gdb/
	* common/scoped_mmap.h: New.
	* unittests/scoped_mmap-selftest.c: New.
	* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add
	unittests/scoped_mmap-selftest.c.
This commit is contained in:
Markus Metzger
2018-01-26 13:57:48 +01:00
parent ea4a088812
commit 84696f37ae
4 changed files with 176 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
gdb/unittests/scoped_mmap-selftests.c Normal file
View File

@ -0,0 +1,92 @@
/* Self tests for scoped_mmap for GDB, the GNU debugger.
Copyright (C) 2018 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 "common/scoped_mmap.h"
#include "config.h"
#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_UNISTD_H)
#include "selftest.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 selftests */
#endif /* !defined(HAVE_SYS_MMAN_H) || !defined(HAVE_UNISTD_H) */
void
_initialize_scoped_mmap_selftests ()
{
#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_UNISTD_H)
selftests::register_test ("scoped_mmap",
selftests::scoped_mmap::run_tests);
#endif
}