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Add mremap tests
Add tests for MREMAP_MAYMOVE and MREMAP_FIXED. On Linux, also test MREMAP_DONTUNMAP. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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H.J. Lu
parent
cb2dee4ecc
commit
ff0320bec2
@ -257,6 +257,8 @@ tests := \
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tst-mntent-blank-passno \
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tst-mntent-escape \
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tst-mntent2 \
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tst-mremap1 \
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tst-mremap2 \
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tst-preadvwritev \
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tst-preadvwritev2 \
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tst-preadvwritev64 \
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46
misc/tst-mremap1.c
Normal file
46
misc/tst-mremap1.c
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@ -0,0 +1,46 @@
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/* Test mremap with MREMAP_MAYMOVE.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/mman.h>
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#include <support/xstdlib.h>
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#include <support/xunistd.h>
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#include <support/check.h>
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#include <support/test-driver.h>
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static int
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do_test (void)
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{
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size_t old_size = getpagesize ();
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char *old_addr = xmmap (NULL, old_size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1);
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old_addr[0] = 1;
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old_addr[old_size - 1] = 2;
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/* Test MREMAP_MAYMOVE. */
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size_t new_size = old_size + old_size;
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char *new_addr = mremap (old_addr, old_size, new_size, MREMAP_MAYMOVE);
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TEST_VERIFY_EXIT (new_addr != MAP_FAILED);
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new_addr[0] = 1;
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new_addr[new_size - 1] = 2;
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xmunmap (new_addr, new_size);
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return 0;
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}
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#include <support/test-driver.c>
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54
misc/tst-mremap2.c
Normal file
54
misc/tst-mremap2.c
Normal file
@ -0,0 +1,54 @@
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/* Test mremap with MREMAP_FIXED.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/mman.h>
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#include <support/xstdlib.h>
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#include <support/xunistd.h>
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#include <support/test-driver.h>
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#include <mremap-failure.h>
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static int
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do_test (void)
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{
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size_t old_size = getpagesize ();
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size_t new_size = old_size + old_size;
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char *old_addr = xmmap (NULL, old_size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1);
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old_addr[0] = 1;
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old_addr[old_size - 1] = 2;
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char *fixed_addr = xmmap (NULL, new_size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1);
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fixed_addr[0] = 1;
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fixed_addr[new_size - 1] = 2;
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/* Test MREMAP_FIXED. */
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char *new_addr = mremap (old_addr, old_size, new_size,
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MREMAP_FIXED | MREMAP_MAYMOVE,
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fixed_addr);
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if (new_addr == MAP_FAILED)
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return mremap_failure_exit (errno);
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new_addr[0] = 1;
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new_addr[new_size - 1] = 2;
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xmunmap (new_addr, new_size);
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return 0;
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}
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#include <support/test-driver.c>
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25
sysdeps/generic/mremap-failure.h
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25
sysdeps/generic/mremap-failure.h
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@ -0,0 +1,25 @@
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/* mremap failure handling. Generic version.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* Return exit value on mremap failure with errno ERR. */
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static int
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mremap_failure_exit (int err)
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{
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return EXIT_FAILURE;
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}
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@ -206,6 +206,7 @@ tests += \
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tst-getauxval \
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tst-gettid \
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tst-gettid-kill \
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tst-linux-mremap1 \
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tst-memfd_create \
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tst-misalign-clone \
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tst-mlock2 \
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30
sysdeps/unix/sysv/linux/mremap-failure.h
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30
sysdeps/unix/sysv/linux/mremap-failure.h
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@ -0,0 +1,30 @@
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/* mremap failure handling. Linux version.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <support/check.h>
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/* Return exit value on mremap failure with errno ERR. */
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static int
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mremap_failure_exit (int err)
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{
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if (err != EINVAL)
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return EXIT_FAILURE;
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return EXIT_UNSUPPORTED;
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}
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63
sysdeps/unix/sysv/linux/tst-linux-mremap1.c
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63
sysdeps/unix/sysv/linux/tst-linux-mremap1.c
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@ -0,0 +1,63 @@
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/* Test mremap with MREMAP_DONTUNMAP.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/mman.h>
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#include <support/xstdlib.h>
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#include <support/xunistd.h>
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#include <support/check.h>
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#include <support/test-driver.h>
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#include <mremap-failure.h>
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static int
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do_test (void)
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{
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size_t old_size = getpagesize ();
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size_t new_size = old_size;
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char *old_addr = xmmap (NULL, old_size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1);
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old_addr[0] = 1;
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old_addr[old_size - 1] = 2;
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/* Create an available 64-page mmap region. */
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size_t fixed_size = old_size * 64;
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char *fixed_addr = xmmap (NULL, fixed_size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1);
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xmunmap (fixed_addr, fixed_size);
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/* Add 3 * pagesize. */
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fixed_size += 3 * old_size;
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/* Test MREMAP_DONTUNMAP. It should return FIXED_ADDR created above. */
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char *new_addr = mremap (old_addr, old_size, new_size,
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MREMAP_DONTUNMAP | MREMAP_MAYMOVE,
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fixed_addr);
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if (new_addr == MAP_FAILED)
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return mremap_failure_exit (errno);
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TEST_VERIFY_EXIT (fixed_addr == new_addr);
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old_addr[0] = 3;
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old_addr[old_size - 1] = 4;
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new_addr[0] = 1;
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new_addr[new_size - 1] = 2;
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xmunmap (new_addr, new_size);
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xmunmap (old_addr, old_size);
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return 0;
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}
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#include <support/test-driver.c>
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