X86-64: Use non-temporal store in memcpy on large data
[glibc.git] / stdlib / tst-makecontext2.c
blob060f8c45bcc827cd9ae7654d738c7276420b4c2d
1 /* Copyright (C) 2008-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <errno.h>
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <ucontext.h>
23 #include <tst-stack-align.h>
25 ucontext_t ucp, ucp2;
26 char st1[262144] __attribute__((aligned (16)));
28 void
29 cf (int i, int j)
31 if (i != 78 || j != 274)
33 printf ("i %d j %d\n", i, j);
34 exit (1);
36 else if (TEST_STACK_ALIGN ())
38 puts ("insufficiently aligned stack");
39 exit (2);
43 int
44 do_test (void)
46 for (size_t j = 32; j < 64; j += sizeof (long))
48 if (getcontext (&ucp) != 0)
50 if (errno == ENOSYS)
52 puts ("context handling not supported");
53 return 0;
56 puts ("getcontext failed");
57 return 1;
59 ucp.uc_link = &ucp2;
60 ucp.uc_stack.ss_sp = st1;
61 ucp.uc_stack.ss_size = sizeof (st1) - j;
62 memset (&st1[sizeof (st1) - j], 0x55, j);
63 makecontext (&ucp, (void (*) (void)) cf, 2, 78, 274);
64 if (swapcontext (&ucp2, &ucp) != 0)
66 puts ("setcontext failed");
67 return 1;
70 for (size_t i = j; i > 0; i--)
71 if (st1[sizeof (st1) - j + i - 1] != 0x55)
72 { printf ("fail %zd %zd\n", i, j); break; }
75 return 0;
78 #define TEST_FUNCTION do_test ()
79 #include "../test-skeleton.c"