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annotate tests/test-c-stack.c @ 17082:62741e75b7c5

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poll/select: document portability problems not fixed by Gnulib. * doc/posix-functions/poll.texi: poll does not work well on pipes under Windows. It has the same limitations as select on BeOS. * doc/posix-functions/select.texi: select does not work well on pipes under Windows.
author Paolo Bonzini <pbonzini@redhat.com>
date Thu, 13 Sep 2012 08:51:16 +0200
parents 8250f2777afc
children e542fd46ad6f
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1 /* Test of c-stack module.
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2 Copyright (C) 2002, 2004, 2006, 2008-2012 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 #include <config.h>
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18
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19 #include "c-stack.h"
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20
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21 #include "exitfail.h"
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22 #include <stdio.h>
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23 #if HAVE_SETRLIMIT
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24 /* At least FreeBSD 5.0 needs extra headers before <sys/resource.h>
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25 will compile. */
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26 # include <sys/types.h>
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27 # include <sys/time.h>
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28 # include <sys/resource.h>
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29 #endif
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30
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31 #include "macros.h"
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32
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33 char *program_name;
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34
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35 static volatile int *
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36 recurse_1 (volatile int n, volatile int *p)
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37 {
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38 if (n >= 0)
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39 *recurse_1 (n + 1, p) += n;
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40 return p;
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41 }
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42
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43 static int
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44 recurse (volatile int n)
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45 {
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46 int sum = 0;
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47 return *recurse_1 (n, &sum);
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48 }
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49
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50 int
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51 main (int argc, char **argv)
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52 {
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53 #if HAVE_SETRLIMIT && defined RLIMIT_STACK
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54 /* Before starting the endless recursion, try to be friendly to the
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55 user's machine. On some Linux 2.2.x systems, there is no stack
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56 limit for user processes at all. We don't want to kill such
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57 systems. */
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58 struct rlimit rl;
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59 rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
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60 setrlimit (RLIMIT_STACK, &rl);
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61 #endif
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62
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63 program_name = argv[0];
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64 if (c_stack_action (NULL) == 0)
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65 {
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66 if (1 < argc)
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67 {
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68 exit_failure = 77;
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69 ++*argv[argc]; /* Intentionally dereference NULL. */
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70 }
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71 return recurse (0);
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72 }
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73 fputs ("skipping test: ", stderr);
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74 perror ("c_stack_action");
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75 return 77;
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76 }