diff options
Diffstat (limited to 'stdlib/tst-makecontext3.c')
| -rw-r--r-- | stdlib/tst-makecontext3.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/stdlib/tst-makecontext3.c b/stdlib/tst-makecontext3.c new file mode 100644 index 0000000000..f127c6a579 --- /dev/null +++ b/stdlib/tst-makecontext3.c @@ -0,0 +1,217 @@ +/* Copyright (C) 2001,2002,2004,2006,2009 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, write to the Free + Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <ucontext.h> +#include <unistd.h> + +static ucontext_t ctx[3]; + +static int was_in_f1; +static int was_in_f2; + +static char st2[32768]; + +static volatile int flag; + +static void +f1 (int a00, int a01, int a02, int a03, int a04, int a05, int a06, int a07, + int a08, int a09, int a10, int a11, int a12, int a13, int a14, int a15, + int a16, int a17, int a18, int a19, int a20, int a21, int a22, int a23, + int a24, int a25, int a26, int a27, int a28, int a29, int a30, int a31, + int a32) +{ + printf ("start f1(a00=%08x,a01=%08x,a02=%08x,a03=%08x,\n" + " a04=%08x,a05=%08x,a06=%08x,a07=%08x,\n" + " a08=%08x,a09=%08x,a10=%08x,a11=%08x,\n" + " a12=%08x,a13=%08x,a14=%08x,a15=%08x,\n" + " a16=%08x,a17=%08x,a18=%08x,a19=%08x,\n" + " a20=%08x,a21=%08x,a22=%08x,a23=%08x,\n" + " a24=%08x,a25=%08x,a26=%08x,a27=%08x,\n" + " a28=%08x,a29=%08x,a30=%08x,a31=%08x,\n" + " a32=%08x) [%d]\n", + a00, a01, a02, a03, a04, a05, a06, a07, + a08, a09, a10, a11, a12, a13, a14, a15, + a16, a17, a18, a19, a20, a21, a22, a23, + a24, a25, a26, a27, a28, a29, a30, a31, + a32, flag); + + if (a00 != (0x00000001 << flag) || a01 != (0x00000004 << flag) + || a02 != (0x00000012 << flag) || a03 != (0x00000048 << flag) + || a04 != (0x00000123 << flag) || a05 != (0x0000048d << flag) + || a06 != (0x00001234 << flag) || a07 != (0x000048d1 << flag) + || a08 != (0x00012345 << flag) || a09 != (0x00048d15 << flag) + || a10 != (0x00123456 << flag) || a11 != (0x0048d159 << flag) + || a12 != (0x01234567 << flag) || a13 != (0x048d159e << flag) + || a14 != (0x12345678 << flag) || a15 != (0x48d159e2 << flag) + || a16 != (0x23456789 << flag) || a17 != (0x8d159e26 << flag) + || a18 != (0x3456789a << flag) || a19 != (0xd159e26a << flag) + || a20 != (0x456789ab << flag) || a21 != (0x159e26af << flag) + || a22 != (0x56789abc << flag) || a23 != (0x59e26af3 << flag) + || a24 != (0x6789abcd << flag) || a25 != (0x9e26af37 << flag) + || a26 != (0x789abcde << flag) || a27 != (0xe26af37b << flag) + || a28 != (0x89abcdef << flag) || a29 != (0x26af37bc << flag) + || a30 != (0x9abcdef0 << flag) || a31 != (0x6af37bc3 << flag) + || a32 != (0xabcdef0f << flag)) + { + puts ("arg mismatch"); + exit (-1); + } + + if (flag && swapcontext (&ctx[1], &ctx[2]) != 0) + { + printf ("%s: swapcontext: %m\n", __FUNCTION__); + exit (1); + } + printf ("finish f1 [%d]\n", flag); + flag++; + was_in_f1++; +} + +static void +f2 (void) +{ + puts ("start f2"); + if (swapcontext (&ctx[2], &ctx[1]) != 0) + { + printf ("%s: swapcontext: %m\n", __FUNCTION__); + exit (1); + } + puts ("finish f2"); + was_in_f2 = 1; +} + +volatile int global; + + +static int back_in_main; + + +static void +check_called (void) +{ + if (back_in_main == 0) + { + puts ("program did not reach main again"); + _exit (1); + } +} + + +int +main (void) +{ + atexit (check_called); + + char st1[32768]; + + puts ("making contexts"); + if (getcontext (&ctx[0]) != 0) + { + if (errno == ENOSYS) + { + back_in_main = 1; + exit (0); + } + + printf ("%s: getcontext: %m\n", __FUNCTION__); + exit (1); + } + + ctx[1] = ctx[0]; + ctx[1].uc_stack.ss_sp = st1; + ctx[1].uc_stack.ss_size = sizeof st1; + ctx[1].uc_link = &ctx[0]; + { + ucontext_t tempctx = ctx[1]; + makecontext (&ctx[1], (void (*) (void)) f1, 33, + 0x00000001 << flag, 0x00000004 << flag, + 0x00000012 << flag, 0x00000048 << flag, + 0x00000123 << flag, 0x0000048d << flag, + 0x00001234 << flag, 0x000048d1 << flag, + 0x00012345 << flag, 0x00048d15 << flag, + 0x00123456 << flag, 0x0048d159 << flag, + 0x01234567 << flag, 0x048d159e << flag, + 0x12345678 << flag, 0x48d159e2 << flag, + 0x23456789 << flag, 0x8d159e26 << flag, + 0x3456789a << flag, 0xd159e26a << flag, + 0x456789ab << flag, 0x159e26af << flag, + 0x56789abc << flag, 0x59e26af3 << flag, + 0x6789abcd << flag, 0x9e26af37 << flag, + 0x789abcde << flag, 0xe26af37b << flag, + 0x89abcdef << flag, 0x26af37bc << flag, + 0x9abcdef0 << flag, 0x6af37bc3 << flag, + 0xabcdef0f << flag); + + /* Without this check, a stub makecontext can make us spin forever. */ + if (memcmp (&tempctx, &ctx[1], sizeof ctx[1]) == 0) + { + puts ("makecontext was a no-op, presuming not implemented"); + return 0; + } + } + + /* Play some tricks with this context. */ + if (++global == 1) + if (setcontext (&ctx[1]) != 0) + { + printf ("%s: setcontext: %m\n", __FUNCTION__); + exit (1); + } + if (global != 2) + { + printf ("%s: 'global' not incremented twice\n", __FUNCTION__); + exit (1); + } + + if (getcontext (&ctx[2]) != 0) + { + printf ("%s: second getcontext: %m\n", __FUNCTION__); + exit (1); + } + ctx[2].uc_stack.ss_sp = st2; + ctx[2].uc_stack.ss_size = sizeof st2; + ctx[2].uc_link = &ctx[1]; + makecontext (&ctx[2], f2, 0); + + puts ("swapping contexts"); + if (swapcontext (&ctx[0], &ctx[2]) != 0) + { + printf ("%s: swapcontext: %m\n", __FUNCTION__); + exit (1); + } + puts ("back at main program"); + back_in_main = 1; + + if (was_in_f1 < 2) + { + puts ("didn't reach f1 twice"); + exit (1); + } + if (was_in_f2 == 0) + { + puts ("didn't reach f2"); + exit (1); + } + + puts ("test succeeded"); + return 0; +} |