diff options
Diffstat (limited to 'elf/tst-stackguard1.c')
| -rw-r--r-- | elf/tst-stackguard1.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/elf/tst-stackguard1.c b/elf/tst-stackguard1.c deleted file mode 100644 index 50739e5b2e..0000000000 --- a/elf/tst-stackguard1.c +++ /dev/null @@ -1,200 +0,0 @@ -/* Copyright (C) 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Jakub Jelinek <jakub@redhat.com>, 2005. - - 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, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/wait.h> -#include <stackguard-macros.h> -#include <unistd.h> - -static const char *command; -static bool child; -static uintptr_t stack_chk_guard_copy; -static bool stack_chk_guard_copy_set; -static int fds[2]; - -static void __attribute__ ((constructor)) -con (void) -{ - stack_chk_guard_copy = STACK_CHK_GUARD; - stack_chk_guard_copy_set = true; -} - -static int -uintptr_t_cmp (const void *a, const void *b) -{ - if (*(uintptr_t *) a < *(uintptr_t *) b) - return 1; - if (*(uintptr_t *) a > *(uintptr_t *) b) - return -1; - return 0; -} - -static int -do_test (void) -{ - if (!stack_chk_guard_copy_set) - { - puts ("constructor has not been run"); - return 1; - } - - if (stack_chk_guard_copy != STACK_CHK_GUARD) - { - puts ("STACK_CHK_GUARD changed between constructor and do_test"); - return 1; - } - - if (child) - { - write (2, &stack_chk_guard_copy, sizeof (stack_chk_guard_copy)); - return 0; - } - - if (command == NULL) - { - puts ("missing --command or --child argument"); - return 1; - } - -#define N 16 - uintptr_t child_stack_chk_guards[N + 1]; - child_stack_chk_guards[N] = stack_chk_guard_copy; - int i; - for (i = 0; i < N; ++i) - { - if (pipe (fds) < 0) - { - printf ("couldn't create pipe: %m\n"); - return 1; - } - - pid_t pid = fork (); - if (pid < 0) - { - printf ("fork failed: %m\n"); - return 1; - } - - if (!pid) - { - if (stack_chk_guard_copy != STACK_CHK_GUARD) - { - puts ("STACK_CHK_GUARD changed after fork"); - exit (1); - } - - close (fds[0]); - close (2); - dup2 (fds[1], 2); - close (fds[1]); - - system (command); - exit (0); - } - - close (fds[1]); - - if (TEMP_FAILURE_RETRY (read (fds[0], &child_stack_chk_guards[i], - sizeof (uintptr_t))) != sizeof (uintptr_t)) - { - puts ("could not read stack_chk_guard value from child"); - return 1; - } - - close (fds[0]); - - pid_t termpid; - int status; - termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)); - if (termpid == -1) - { - printf ("waitpid failed: %m\n"); - return 1; - } - else if (termpid != pid) - { - printf ("waitpid returned %ld != %ld\n", - (long int) termpid, (long int) pid); - return 1; - } - else if (!WIFEXITED (status) || WEXITSTATUS (status)) - { - puts ("child hasn't exited with exit status 0"); - return 1; - } - } - - qsort (child_stack_chk_guards, N + 1, sizeof (uintptr_t), uintptr_t_cmp); - - uintptr_t default_guard = 0; - unsigned char *p = (unsigned char *) &default_guard; - p[sizeof (uintptr_t) - 1] = 255; - p[sizeof (uintptr_t) - 2] = '\n'; - p[0] = 0; - - /* Test if the stack guard canaries are either randomized, - or equal to the default stack guard canary value. - Even with randomized stack guards it might happen - that the random number generator generates the same - values, but if that happens in more than half from - the 16 runs, something is very wrong. */ - int ndifferences = 0; - int ndefaults = 0; - int npartlyrandomized = 0; - for (i = 0; i < N; ++i) - { - if (child_stack_chk_guards[i] != child_stack_chk_guards[i+1]) - ndifferences++; - else if (child_stack_chk_guards[i] == default_guard) - ndefaults++; - else if (*(char *) &child_stack_chk_guards[i] == 0) - npartlyrandomized++; - } - - printf ("differences %d defaults %d partly randomized %d\n", - ndifferences, ndefaults, npartlyrandomized); - - if ((ndifferences + ndefaults + npartlyrandomized) < 3 * N / 4) - { - puts ("stack guard canaries are not randomized enough"); - puts ("nor equal to the default canary value"); - return 1; - } - - return 0; -} - -#define OPT_COMMAND 10000 -#define OPT_CHILD 10001 -#define CMDLINE_OPTIONS \ - { "command", required_argument, NULL, OPT_COMMAND }, \ - { "child", no_argument, NULL, OPT_CHILD }, -#define CMDLINE_PROCESS \ - case OPT_COMMAND: \ - command = optarg; \ - break; \ - case OPT_CHILD: \ - child = true; \ - break; -#define TEST_FUNCTION do_test () -#include "../test-skeleton.c" |