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b39b6e0c90
This patch adds cancellation tests for both sendmmsg and recvmmsg
syscalls. Since for some system configuration (x86_64/i686 on
older kernels and non-Linux platforms), the tests are added as
two independent that report as unsupported if the syscall is not
presented.
Both new tests uses the already tst-cancel4.c code, which as moved
to a common tst-cancel4-common{.c,h} files.
Tested on x86_64 and i686.
* nptl/Makefile (test): Add tst-cancel4_1 and tst-cancel4_2.
* nptl/tst-cancel4-common.c: New file.
* nptl/tst-cancel4-common.h: Likewise.
* nptl/tst-cancel4.c: Move common definitions to
tst-cancel4-common.{c,h} file.
* nptl/tst-cancel4_1.c: New test.
* nptl/tst-cancel4_2.c: New test.
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/* Common definition for tst-cancel4_* tests.
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Copyright (C) 2016 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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<http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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/* Pipe descriptors. */
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static int fds[2];
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/* Temporary file descriptor, to be closed after each round. */
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static int tempfd = -1;
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static int tempfd2 = -1;
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/* Name of temporary file to be removed after each round. */
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static char *tempfname;
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/* Temporary message queue. */
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static int tempmsg = -1;
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/* Often used barrier for two threads. */
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static pthread_barrier_t b2;
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/* The WRITE_BUFFER_SIZE value needs to be chosen such that if we set
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the socket send buffer size to '1', a write of this size on that
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socket will block.
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The Linux kernel imposes a minimum send socket buffer size which
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has changed over the years. As of Linux 3.10 the value is:
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2 * (2048 + SKB_DATA_ALIGN(sizeof(struct sk_buff)))
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which is attempting to make sure that with standard MTUs,
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TCP can always queue up at least 2 full sized packets.
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Furthermore, there is logic in the socket send paths that
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will allow one more packet (of any size) to be queued up as
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long as some socket buffer space remains. Blocking only
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occurs when we try to queue up a new packet and the send
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buffer space has already been fully consumed.
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Therefore we must set this value to the largest possible value of
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the formula above (and since it depends upon the size of "struct
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sk_buff", it is dependent upon machine word size etc.) plus some
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slack space. */
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#define WRITE_BUFFER_SIZE 16384
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/* Cleanup handling test. */
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static int cl_called;
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static void
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cl (void *arg)
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{
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++cl_called;
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}
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struct cancel_tests
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{
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const char *name;
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void *(*tf) (void *);
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int nb;
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int only_early;
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};
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#define ADD_TEST(name, nbar, early) { #name, tf_##name, nbar, early }
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