diff options
| author | Scott Griepentrog <sgriepentrog@digium.com> | 2015-03-17 22:03:37 +0000 |
|---|---|---|
| committer | Scott Griepentrog <sgriepentrog@digium.com> | 2015-03-17 22:03:37 +0000 |
| commit | f25b2653293d0d96479d3d83795f40828f0b7bb7 (patch) | |
| tree | e5d152dcafb84793b3682913e9a35a4b3098a11b /include/asterisk/utils.h | |
| parent | 62cf2a2c02076e14792e5ded90942bc2b1b86961 (diff) | |
core: Introduce chaos into memory allocations
Locate potential crashes by exercising seldom
used code paths. This patch introduces a new
define DEBUG_CHAOS, and mechanism to randomly
return an error condition from functions that
will seldom do so. Functions that handle the
allocation of memory get the first treatment.
Review: https://reviewboard.asterisk.org/r/4463/
........
Merged revisions 433060 from http://svn.asterisk.org/svn/asterisk/branches/13
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@433063 65c4cc65-6c06-0410-ace0-fbb531ad65f3
Diffstat (limited to 'include/asterisk/utils.h')
| -rw-r--r-- | include/asterisk/utils.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/asterisk/utils.h b/include/asterisk/utils.h index 1dc351d0a..e4c4c8bea 100644 --- a/include/asterisk/utils.h +++ b/include/asterisk/utils.h @@ -485,6 +485,32 @@ long int ast_random(void); */ #define ast_random_double() (((double)ast_random()) / RAND_MAX) +/*! + * \brief DEBUG_CHAOS returns failure randomly + * + * DEBUG_CHAOS_RETURN(failure); can be used to fake + * failure of functions such as memory allocation, + * for the purposes of testing failure handling. + */ +#ifdef DEBUG_CHAOS +#ifndef DEBUG_CHAOS_ALLOC_CHANCE +#define DEBUG_CHAOS_ALLOC_CHANCE 100000 +#endif +/* Could #define DEBUG_CHAOS_ENABLE ast_fully_booted */ +#ifndef DEBUG_CHAOS_ENABLE +#define DEBUG_CHAOS_ENABLE 1 +#endif +#define DEBUG_CHAOS_RETURN(CHANCE, FAILURE) \ + do { \ + if ((DEBUG_CHAOS_ENABLE) && (ast_random() % CHANCE == 0)) { \ + return FAILURE; \ + } \ + } while (0) +#else +#define DEBUG_CHAOS_RETURN(c,f) +#endif + + #ifndef __AST_DEBUG_MALLOC #define ast_std_malloc malloc #define ast_std_calloc calloc @@ -537,6 +563,8 @@ void * attribute_malloc _ast_malloc(size_t len, const char *file, int lineno, co { void *p; + DEBUG_CHAOS_RETURN(DEBUG_CHAOS_ALLOC_CHANCE, NULL); + if (!(p = malloc(len))) { MALLOC_FAILURE_MSG; } @@ -561,6 +589,8 @@ void * attribute_malloc _ast_calloc(size_t num, size_t len, const char *file, in { void *p; + DEBUG_CHAOS_RETURN(DEBUG_CHAOS_ALLOC_CHANCE, NULL); + if (!(p = calloc(num, len))) { MALLOC_FAILURE_MSG; } @@ -598,6 +628,8 @@ void * attribute_malloc _ast_realloc(void *p, size_t len, const char *file, int { void *newp; + DEBUG_CHAOS_RETURN(DEBUG_CHAOS_ALLOC_CHANCE, NULL); + if (!(newp = realloc(p, len))) { MALLOC_FAILURE_MSG; } @@ -626,6 +658,8 @@ char * attribute_malloc _ast_strdup(const char *str, const char *file, int linen { char *newstr = NULL; + DEBUG_CHAOS_RETURN(DEBUG_CHAOS_ALLOC_CHANCE, NULL); + if (str) { if (!(newstr = strdup(str))) { MALLOC_FAILURE_MSG; @@ -656,6 +690,8 @@ char * attribute_malloc _ast_strndup(const char *str, size_t len, const char *fi { char *newstr = NULL; + DEBUG_CHAOS_RETURN(DEBUG_CHAOS_ALLOC_CHANCE, NULL); + if (str) { if (!(newstr = strndup(str, len))) { MALLOC_FAILURE_MSG; @@ -697,6 +733,8 @@ int _ast_vasprintf(char **ret, const char *file, int lineno, const char *func, c { int res; + DEBUG_CHAOS_RETURN(DEBUG_CHAOS_ALLOC_CHANCE, -1); + if ((res = vasprintf(ret, fmt, ap)) == -1) { MALLOC_FAILURE_MSG; } |