diff options
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/Makefile | 2 | ||||
| -rw-r--r-- | stdlib/tst-setcontext.c | 113 |
2 files changed, 114 insertions, 1 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile index 193c42b284..301e2d22f3 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -59,7 +59,7 @@ test-srcs := tst-fmtmsg tests := tst-strtol tst-strtod testmb testrand testsort testdiv \ test-canon test-canon2 tst-strtoll tst-environ \ tst-xpg-basename tst-random tst-bsearch tst-limits \ - tst-rand48 bug-strtod + tst-rand48 bug-strtod tst-setcontext # Several mpn functions from GNU MP are used by the strtod function. diff --git a/stdlib/tst-setcontext.c b/stdlib/tst-setcontext.c new file mode 100644 index 0000000000..6ee1b514a6 --- /dev/null +++ b/stdlib/tst-setcontext.c @@ -0,0 +1,113 @@ +/* Copyright (C) 2001 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <ucontext.h> + +static ucontext_t ctx[3]; + +static int was_in_f1; +static int was_in_f2; + +static void +f1 (long a0, long a1, long a2, long a3) +{ + printf ("start f1(a0=%lx,a1=%lx,a2=%lx,a3=%lx)\n", a0, a1, a2, a3); + + if (a0 != 1 || a1 != 2 || a2 != 3 || a3 != -4) + { + puts ("arg mismatch"); + exit (-1); + } + + if (swapcontext (&ctx[1], &ctx[2]) != 0) + { + printf ("%s: swapcontext: %m\n", __FUNCTION__); + exit (1); + } + puts ("finish f1"); + was_in_f1 = 1; +} + +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; +} + +int +main (void) +{ + char st1[8192]; + char st2[8192]; + + puts ("making contexts"); + if (getcontext (&ctx[1]) != 0) + { + if (errno == ENOSYS) + exit (0); + + printf ("%s: getcontext: %m\n", __FUNCTION__); + exit (1); + } + ctx[1].uc_stack.ss_sp = st1; + ctx[1].uc_stack.ss_size = sizeof st1; + ctx[1].uc_link = &ctx[0]; + makecontext (&ctx[1], (void (*) (void)) f1, 4, 1, 2, 3, -4); + + 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"); + + if (was_in_f1 == 0) + { + puts ("didn't reach f1"); + exit (1); + } + if (was_in_f2 == 0) + { + puts ("didn't reach f2"); + exit (1); + } + + puts ("test succeeded"); + return 0; +} |