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Diffstat (limited to 'source3/lib/clobber.c')
-rw-r--r-- | source3/lib/clobber.c | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/source3/lib/clobber.c b/source3/lib/clobber.c deleted file mode 100644 index e77e786fb5d..00000000000 --- a/source3/lib/clobber.c +++ /dev/null @@ -1,63 +0,0 @@ -/* - Unix SMB/CIFS implementation. - Samba utility functions - Copyright (C) Martin Pool 2003 - Copyright (C) Andrew Bartlett 2003 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -#include "includes.h" - -#ifdef DEVELOPER -const char *global_clobber_region_function; -unsigned int global_clobber_region_line; -#endif - -/** - * In developer builds, clobber a region of memory. - * - * If we think a string buffer is longer than it really is, this ought - * to make the failure obvious, by segfaulting (if in the heap) or by - * killing the return address (on the stack), or by trapping under a - * memory debugger. - * - * This is meant to catch possible string overflows, even if the - * actual string copied is not big enough to cause an overflow. - * - * In addition, under Valgrind the buffer is marked as uninitialized. - **/ -void clobber_region(const char *fn, unsigned int line, char *dest, size_t len) -{ -#ifdef DEVELOPER - global_clobber_region_function = fn; - global_clobber_region_line = line; - - /* F1 is odd and 0xf1f1f1f1 shouldn't be a valid pointer */ - memset(dest, 0xF1, len); -#ifdef VALGRIND - /* Even though we just wrote to this, from the application's - * point of view it is not initialized. - * - * (This is not redundant with the clobbering above. The - * marking might not actually take effect if we're not running - * under valgrind.) */ -#if defined(VALGRIND_MAKE_MEM_UNDEFINED) - VALGRIND_MAKE_MEM_UNDEFINED(dest, len); -#elif defined(VALGRIND_MAKE_WRITABLE) - VALGRIND_MAKE_WRITABLE(dest, len); -#endif -#endif /* VALGRIND */ -#endif /* DEVELOPER */ -} |