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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2016-06-14 17:56:33 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2016-06-21 11:29:18 -0300
commit4751bbe2ad4d1bfa05774e29376d553ecfe563b0 (patch)
tree029d8253f0c76d8ab16f6f477dd53007113e7c55 /misc
parentdf2258c6cb4250e53f12b59785987c338b5cf396 (diff)
downloadglibc-4751bbe2ad4d1bfa05774e29376d553ecfe563b0.tar.gz
Fix p{readv,writev}{64} consolidation implementation
This patch fixes the p{readv,writev}{64} consolidation implementation from commits 4e77815 and af5fdf5. Different from pread/pwrite implementation, preadv/pwritev implementation does not require __ALIGNMENT_ARG because kernel syscall prototypes define the high and low part of the off_t, if it is the case, directly (different from pread/pwrite where the architecture ABI for passing 64-bit values must be in consideration for passsing the arguments). It also adds some basic tests for preadv/pwritev. Tested on x86_64, i686, and armhf. * misc/Makefile (tests): Add tst-preadvwritev and tst-preadvwritev64. * misc/tst-preadvwritev.c: New file. * misc/tst-preadvwritev64.c: Likewise. * sysdeps/unix/sysv/linux/preadv.c (preadv): Remove SYSCALL_LL{64} usage. * sysdeps/unix/sysv/linux/preadv64.c (preadv64): Likewise. * sysdeps/unix/sysv/linux/pwritev.c (pwritev): Likewise. * sysdeps/unix/sysv/linux/pwritev64.c (pwritev64): Likewise. * sysdeps/unix/sysv/linux/sysdep.h (LO_HI_LONG): New macro.
Diffstat (limited to 'misc')
-rw-r--r--misc/Makefile3
-rw-r--r--misc/tst-preadvwritev.c114
-rw-r--r--misc/tst-preadvwritev64.c22
3 files changed, 138 insertions, 1 deletions
diff --git a/misc/Makefile b/misc/Makefile
index 6498adc3aa..56e20ce521 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -77,7 +77,8 @@ gpl2lgpl := error.c error.h
tests := tst-dirname tst-tsearch tst-fdset tst-efgcvt tst-mntent tst-hsearch \
tst-error1 tst-pselect tst-insremque tst-mntent2 bug-hsearch1 \
- tst-mntent-blank-corrupt tst-mntent-blank-passno bug18240
+ tst-mntent-blank-corrupt tst-mntent-blank-passno bug18240 \
+ tst-preadvwritev tst-preadvwritev64
ifeq ($(run-built-tests),yes)
tests-special += $(objpfx)tst-error1-mem.out
endif
diff --git a/misc/tst-preadvwritev.c b/misc/tst-preadvwritev.c
new file mode 100644
index 0000000000..08deecca11
--- /dev/null
+++ b/misc/tst-preadvwritev.c
@@ -0,0 +1,114 @@
+/* Tests for preadv and pwritev.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sys/uio.h>
+
+/* Allow testing of the 64-bit versions as well. */
+#ifndef PREADV
+# define PREADV preadv
+# define PWRITEV pwritev
+#endif
+
+static void do_prepare (void);
+static int do_test (void);
+#define PREPARE(argc, argv) do_prepare ()
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+static char *temp_filename;
+static int temp_fd;
+
+void
+do_prepare (void)
+{
+ temp_fd = create_temp_file ("tst-PREADVwritev.", &temp_filename);
+ if (temp_fd == -1)
+ {
+ printf ("cannot create temporary file: %m\n");
+ exit (1);
+ }
+}
+
+#define FAIL(str) \
+ do { printf ("error: %s (line %d)\n", str, __LINE__); return 1; } while (0)
+
+int
+do_test (void)
+{
+ struct iovec iov[2];
+ ssize_t ret;
+
+ char buf1[32];
+ char buf2[64];
+
+ memset (buf1, 0xf0, sizeof buf1);
+ memset (buf2, 0x0f, sizeof buf2);
+
+ memset (iov, 0, sizeof iov);
+ iov[0].iov_base = buf1;
+ iov[0].iov_len = sizeof buf1;
+ iov[1].iov_base = buf2;
+ iov[1].iov_len = sizeof buf2;
+
+ ret = PWRITEV (temp_fd, iov, 2, 0);
+ if (ret == -1)
+ FAIL ("first PWRITEV returned -1");
+ if (ret != (sizeof buf1 + sizeof buf2))
+ FAIL ("first PWRITEV returned an unexpected value");
+
+ ret = PWRITEV (temp_fd, iov, 2, sizeof buf1 + sizeof buf2);
+ if (ret == -1)
+ FAIL ("second PWRITEV returned -1");
+ if (ret != (sizeof buf1 + sizeof buf2))
+ FAIL ("second PWRITEV returned an unexpected value");
+
+ char buf3[32];
+ char buf4[64];
+
+ memset (buf3, 0x0f, sizeof buf3);
+ memset (buf4, 0xf0, sizeof buf4);
+
+ iov[0].iov_base = buf3;
+ iov[0].iov_len = sizeof buf3;
+ iov[1].iov_base = buf4;
+ iov[1].iov_len = sizeof buf4;
+
+ ret = PREADV (temp_fd, iov, 2, 0);
+ if (ret == -1)
+ FAIL ("first PREADV returned -1");
+ if (ret != (sizeof buf3 + sizeof buf4))
+ FAIL ("first PREADV returned an unexpected value");
+
+ if (memcmp (buf1, buf3, sizeof buf1) != 0)
+ FAIL ("first buffer from first PREADV different than expected");
+ if (memcmp (buf2, buf4, sizeof buf2) != 0)
+ FAIL ("second buffer from first PREADV different than expected");
+
+ ret = PREADV (temp_fd, iov, 2, sizeof buf3 + sizeof buf4);
+ if (ret == -1)
+ FAIL ("second PREADV returned -1");
+ if (ret != (sizeof buf3 + sizeof buf4))
+ FAIL ("second PREADV returned an unexpected value");
+
+ if (memcmp (buf1, buf3, sizeof buf1) != 0)
+ FAIL ("first buffer from second PREADV different than expected");
+ if (memcmp (buf2, buf4, sizeof buf2) != 0)
+ FAIL ("second buffer from second PREADV different than expected");
+
+ return 0;
+}
diff --git a/misc/tst-preadvwritev64.c b/misc/tst-preadvwritev64.c
new file mode 100644
index 0000000000..ff6e134eab
--- /dev/null
+++ b/misc/tst-preadvwritev64.c
@@ -0,0 +1,22 @@
+/* Tests for pread64 and pwrite64.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define PREADV preadv64
+#define PWRITEV pwritev64
+
+#include "tst-preadvwritev.c"