diff options
Diffstat (limited to 'source3/lib')
| -rw-r--r-- | source3/lib/util.c | 143 | ||||
| -rw-r--r-- | source3/lib/util_malloc.c | 171 |
2 files changed, 171 insertions, 143 deletions
diff --git a/source3/lib/util.c b/source3/lib/util.c index f86f51790f..173e9067cc 100644 --- a/source3/lib/util.c +++ b/source3/lib/util.c @@ -430,149 +430,6 @@ NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx, return status; } -#if defined(PARANOID_MALLOC_CHECKER) - -/**************************************************************************** - Internal malloc wrapper. Externally visible. -****************************************************************************/ - -void *malloc_(size_t size) -{ - if (size == 0) { - return NULL; - } -#undef malloc - return malloc(size); -#define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY -} - -/**************************************************************************** - Internal calloc wrapper. Not externally visible. -****************************************************************************/ - -static void *calloc_(size_t count, size_t size) -{ - if (size == 0 || count == 0) { - return NULL; - } -#undef calloc - return calloc(count, size); -#define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY -} - -/**************************************************************************** - Internal realloc wrapper. Not externally visible. -****************************************************************************/ - -static void *realloc_(void *ptr, size_t size) -{ -#undef realloc - return realloc(ptr, size); -#define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY -} - -#endif /* PARANOID_MALLOC_CHECKER */ - -/**************************************************************************** - Type-safe memalign -****************************************************************************/ - -void *memalign_array(size_t el_size, size_t align, unsigned int count) -{ - if (count >= MAX_ALLOC_SIZE/el_size) { - return NULL; - } - - return sys_memalign(align, el_size*count); -} - -/**************************************************************************** - Type-safe calloc. -****************************************************************************/ - -void *calloc_array(size_t size, size_t nmemb) -{ - if (nmemb >= MAX_ALLOC_SIZE/size) { - return NULL; - } - if (size == 0 || nmemb == 0) { - return NULL; - } -#if defined(PARANOID_MALLOC_CHECKER) - return calloc_(nmemb, size); -#else - return calloc(nmemb, size); -#endif -} - -/**************************************************************************** - Expand a pointer to be a particular size. - Note that this version of Realloc has an extra parameter that decides - whether to free the passed in storage on allocation failure or if the - new size is zero. - - This is designed for use in the typical idiom of : - - p = SMB_REALLOC(p, size) - if (!p) { - return error; - } - - and not to have to keep track of the old 'p' contents to free later, nor - to worry if the size parameter was zero. In the case where NULL is returned - we guarentee that p has been freed. - - If free later semantics are desired, then pass 'free_old_on_error' as False which - guarentees that the old contents are not freed on error, even if size == 0. To use - this idiom use : - - tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size); - if (!tmp) { - SAFE_FREE(p); - return error; - } else { - p = tmp; - } - - Changes were instigated by Coverity error checking. JRA. -****************************************************************************/ - -void *Realloc(void *p, size_t size, bool free_old_on_error) -{ - void *ret=NULL; - - if (size == 0) { - if (free_old_on_error) { - SAFE_FREE(p); - } - DEBUG(2,("Realloc asked for 0 bytes\n")); - return NULL; - } - -#if defined(PARANOID_MALLOC_CHECKER) - if (!p) { - ret = (void *)malloc_(size); - } else { - ret = (void *)realloc_(p,size); - } -#else - if (!p) { - ret = (void *)malloc(size); - } else { - ret = (void *)realloc(p,size); - } -#endif - - if (!ret) { - if (free_old_on_error && p) { - SAFE_FREE(p); - } - DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size)); - } - - return(ret); -} - /**************************************************************************** (Hopefully) efficient array append. ****************************************************************************/ diff --git a/source3/lib/util_malloc.c b/source3/lib/util_malloc.c new file mode 100644 index 0000000000..c052adc41b --- /dev/null +++ b/source3/lib/util_malloc.c @@ -0,0 +1,171 @@ +/* + Unix SMB/CIFS implementation. + Samba utility functions + Copyright (C) Andrew Tridgell 1992-1998 + Copyright (C) Jeremy Allison 2001-2007 + Copyright (C) Simo Sorce 2001 + Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003 + Copyright (C) James Peach 2006 + + 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" + +/* Max allowable allococation - 256mb - 0x10000000 */ +#define MAX_ALLOC_SIZE (1024*1024*256) + +#if defined(PARANOID_MALLOC_CHECKER) + +/**************************************************************************** + Internal malloc wrapper. Externally visible. +****************************************************************************/ + +void *malloc_(size_t size) +{ + if (size == 0) { + return NULL; + } +#undef malloc + return malloc(size); +#define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY +} + +/**************************************************************************** + Internal calloc wrapper. Not externally visible. +****************************************************************************/ + +static void *calloc_(size_t count, size_t size) +{ + if (size == 0 || count == 0) { + return NULL; + } +#undef calloc + return calloc(count, size); +#define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY +} + +/**************************************************************************** + Internal realloc wrapper. Not externally visible. +****************************************************************************/ + +static void *realloc_(void *ptr, size_t size) +{ +#undef realloc + return realloc(ptr, size); +#define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY +} + +#endif /* PARANOID_MALLOC_CHECKER */ + +/**************************************************************************** + Type-safe memalign +****************************************************************************/ + +void *memalign_array(size_t el_size, size_t align, unsigned int count) +{ + if (count >= MAX_ALLOC_SIZE/el_size) { + return NULL; + } + + return sys_memalign(align, el_size*count); +} + +/**************************************************************************** + Type-safe calloc. +****************************************************************************/ + +void *calloc_array(size_t size, size_t nmemb) +{ + if (nmemb >= MAX_ALLOC_SIZE/size) { + return NULL; + } + if (size == 0 || nmemb == 0) { + return NULL; + } +#if defined(PARANOID_MALLOC_CHECKER) + return calloc_(nmemb, size); +#else + return calloc(nmemb, size); +#endif +} + +/**************************************************************************** + Expand a pointer to be a particular size. + Note that this version of Realloc has an extra parameter that decides + whether to free the passed in storage on allocation failure or if the + new size is zero. + + This is designed for use in the typical idiom of : + + p = SMB_REALLOC(p, size) + if (!p) { + return error; + } + + and not to have to keep track of the old 'p' contents to free later, nor + to worry if the size parameter was zero. In the case where NULL is returned + we guarentee that p has been freed. + + If free later semantics are desired, then pass 'free_old_on_error' as False which + guarentees that the old contents are not freed on error, even if size == 0. To use + this idiom use : + + tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size); + if (!tmp) { + SAFE_FREE(p); + return error; + } else { + p = tmp; + } + + Changes were instigated by Coverity error checking. JRA. +****************************************************************************/ + +void *Realloc(void *p, size_t size, bool free_old_on_error) +{ + void *ret=NULL; + + if (size == 0) { + if (free_old_on_error) { + SAFE_FREE(p); + } + DEBUG(2,("Realloc asked for 0 bytes\n")); + return NULL; + } + +#if defined(PARANOID_MALLOC_CHECKER) + if (!p) { + ret = (void *)malloc_(size); + } else { + ret = (void *)realloc_(p,size); + } +#else + if (!p) { + ret = (void *)malloc(size); + } else { + ret = (void *)realloc(p,size); + } +#endif + + if (!ret) { + if (free_old_on_error && p) { + SAFE_FREE(p); + } + DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size)); + } + + return(ret); +} + |