/* Test for string function add boundaries of usable memory. Copyright (C) 1996,1997,1999-2002,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. 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, see <http://www.gnu.org/licenses/>. */ #define _GNU_SOURCE 1 /* Make sure we don't test the optimized inline functions if we want to test the real implementation. */ #undef __USE_STRING_INLINES #include <errno.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <sys/mman.h> #include <sys/param.h> #ifndef MAX #define MAX(a, b) ((a) > (b) ? (a) : (b)) #endif int main (int argc, char *argv[]) { int size = sysconf (_SC_PAGESIZE); char *adr, *dest; int result = 0; adr = (char *) mmap (NULL, 3 * size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); dest = (char *) mmap (NULL, 3 * size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); if (adr == MAP_FAILED || dest == MAP_FAILED) { if (errno == ENOSYS) puts ("No test, mmap not available."); else { printf ("mmap failed: %s", strerror(errno)); result = 1; } } else { int inner, middle, outer; mprotect(adr, size, PROT_NONE); mprotect(adr + 2 * size, size, PROT_NONE); adr += size; mprotect(dest, size, PROT_NONE); mprotect(dest + 2 * size, size, PROT_NONE); dest += size; memset (adr, 'T', size); /* strlen test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (inner = MAX (outer, size - 64); inner < size; ++inner) { adr[inner] = '\0'; if (strlen (&adr[outer]) != (size_t) (inner - outer)) { printf ("strlen flunked for outer = %d, inner = %d\n", outer, inner); result = 1; } adr[inner] = 'T'; } } /* strchr test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (middle = MAX (outer, size - 64); middle < size; ++middle) { for (inner = middle; inner < size; ++inner) { char *cp; adr[middle] = 'V'; adr[inner] = '\0'; cp = strchr (&adr[outer], 'V'); if ((inner == middle && cp != NULL) || (inner != middle && (cp - &adr[outer]) != middle - outer)) { printf ("strchr flunked for outer = %d, middle = %d, " "inner = %d\n", outer, middle, inner); result = 1; } adr[inner] = 'T'; adr[middle] = 'T'; } } } /* Special test. */ adr[size - 1] = '\0'; if (strchr (&adr[size - 1], '\n') != NULL) { puts ("strchr flunked for test of empty string at end of page"); result = 1; } /* strrchr test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (middle = MAX (outer, size - 64); middle < size; ++middle) { for (inner = middle; inner < size; ++inner) { char *cp; adr[middle] = 'V'; adr[inner] = '\0'; cp = strrchr (&adr[outer], 'V'); if ((inner == middle && cp != NULL) || (inner != middle && (cp - &adr[outer]) != middle - outer)) { printf ("strrchr flunked for outer = %d, middle = %d, " "inner = %d\n", outer, middle, inner); result = 1; } adr[inner] = 'T'; adr[middle] = 'T'; } } } /* rawmemchr test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (middle = MAX (outer, size - 64); middle < size; ++middle) { char *cp; adr[middle] = 'V'; cp = rawmemchr (&adr[outer], 'V'); if (cp - &adr[outer] != middle - outer) { printf ("rawmemchr flunked for outer = %d, middle = %d\n", outer, middle); result = 1; } adr[middle] = 'T'; } } /* strcpy test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (inner = MAX (outer, size - 64); inner < size; ++inner) { adr[inner] = '\0'; if (strcpy (dest, &adr[outer]) != dest || strlen (dest) != (size_t) (inner - outer)) { printf ("strcpy flunked for outer = %d, inner = %d\n", outer, inner); result = 1; } adr[inner] = 'T'; } } /* strncpy tests */ adr[size-1] = 'T'; for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { size_t len; for (len = 0; len < size - outer; ++len) { if (strncpy (dest, &adr[outer], len) != dest || memcmp (dest, &adr[outer], len) != 0) { printf ("outer strncpy flunked for outer = %d, len = %Zd\n", outer, len); result = 1; } } } adr[size-1] = '\0'; for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (inner = MAX (outer, size - 64); inner < size; ++inner) { size_t len; adr[inner] = '\0'; for (len = 0; len < size - outer + 64; ++len) { if (strncpy (dest, &adr[outer], len) != dest || memcmp (dest, &adr[outer], MIN (inner - outer, len)) != 0 || (inner - outer < len && strlen (dest) != (inner - outer))) { printf ("strncpy flunked for outer = %d, inner = %d, len = %Zd\n", outer, inner, len); result = 1; } if (strncpy (dest + 1, &adr[outer], len) != dest + 1 || memcmp (dest + 1, &adr[outer], MIN (inner - outer, len)) != 0 || (inner - outer < len && strlen (dest + 1) != (inner - outer))) { printf ("strncpy+1 flunked for outer = %d, inner = %d, len = %Zd\n", outer, inner, len); result = 1; } } adr[inner] = 'T'; } } /* stpcpy test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (inner = MAX (outer, size - 64); inner < size; ++inner) { adr[inner] = '\0'; if ((stpcpy (dest, &adr[outer]) - dest) != inner - outer) { printf ("stpcpy flunked for outer = %d, inner = %d\n", outer, inner); result = 1; } adr[inner] = 'T'; } } /* stpncpy test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) { for (middle = MAX (outer, size - 64); middle < size; ++middle) { adr[middle] = '\0'; for (inner = 0; inner < size - outer; ++ inner) { if ((stpncpy (dest, &adr[outer], inner) - dest) != MIN (inner, middle - outer)) { printf ("stpncpy flunked for outer = %d, middle = %d, " "inner = %d\n", outer, middle, inner); result = 1; } } adr[middle] = 'T'; } } /* memcpy test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) for (inner = 0; inner < size - outer; ++inner) if (memcpy (dest, &adr[outer], inner) != dest) { printf ("memcpy flunked for outer = %d, inner = %d\n", outer, inner); result = 1; } /* mempcpy test */ for (outer = size - 1; outer >= MAX (0, size - 128); --outer) for (inner = 0; inner < size - outer; ++inner) if (mempcpy (dest, &adr[outer], inner) != dest + inner) { printf ("mempcpy flunked for outer = %d, inner = %d\n", outer, inner); result = 1; } /* memccpy test */ memset (adr, '\0', size); for (outer = size - 1; outer >= MAX (0, size - 128); --outer) for (inner = 0; inner < size - outer; ++inner) if (memccpy (dest, &adr[outer], '\1', inner) != NULL) { printf ("memccpy flunked full copy for outer = %d, inner = %d\n", outer, inner); result = 1; } for (outer = size - 1; outer >= MAX (0, size - 128); --outer) for (middle = 0; middle < size - outer; ++middle) { memset (dest, '\2', middle + 1); for (inner = 0; inner < middle; ++inner) { adr[outer + inner] = '\1'; if (memccpy (dest, &adr[outer], '\1', middle + 128) != dest + inner + 1) { printf ("\ memccpy flunked partial copy for outer = %d, middle = %d, inner = %d\n", outer, middle, inner); result = 1; } else if (dest[inner + 1] != '\2') { printf ("\ memccpy copied too much for outer = %d, middle = %d, inner = %d\n", outer, middle, inner); result = 1; } adr[outer + inner] = '\0'; } } } return result; }