Linux Kernel Programming: Defensive programming Learning for source analysis

Source: Internet
Author: User

 /* *kernel  : linux2.6.32.63  *file    : \scripts \mod\modpost.h             \scripts\mod\ modpost.c   *author  : davidlin        * date    : 2014-12-25pm        *email    : [email protected] or [email protected]         *world   : the city of SZ, in China         *Ver     : 000.000.001         *history :     editor       time            do         *          1) linpeng        2014-12-25      created this file!         *          2)          */ /* modpost.h */#define  nofail (PTR)     do_nofail ( PTR),  #ptr)  void* do_nofail  (void* ptr, const char* expr);/* end  of modpost.h *//* modpost.c */void* do_nofail (void* ptr, const  char* expr) {    if (!ptr)         fatal (" Modpost: memory allocation failure:%s.\n ",  expr);     return ptr;} Static struct module* new_module (char* modname) {    struct module * mod;    char *p, *s;        mod = nofail ( malloc (sizeof (*MOD)));     memset (Mod, 0, sizeof (*mod));     p  = nofail (StrDup (modname));    /* strip trailing .o */     S = STRRCHR (p,  '. ');     if (s != null)         if (strcmp (s),   ". O")  == 0)             *s =   '     /* add to list */    mod->name ';  = p;    mod->gpl_compatible = -1;    mod-> next = modules;    modules = mod;    return  MoD;}

Linux Kernel Programming: Defensive programming Learning for source analysis

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