我以前對realloc的使用方式可能會造成內存泄露

heixia108

1. char *p = (char *)malloc(size);
   
2. ....
   
3. p = (char *)realloc(p, newsize);
   

復制代碼

如果realloc失敗，那么p = NULL,而此前p所指向的內存將可能產(chǎn)生丟失（因為沒有free，而現(xiàn)在我們很可能沒有記錄p以前的值）

realloc() returns a pointer to the newly allocated memory, which is suitably aligned for any kind of variable and
       may be different from ptr, or NULL if the request fails.  If size was equal to 0, either NULL or a pointer  suit-
       able  to  be  passed  to  free() is returned.  If realloc() fails the original block is left untouched; it is not
       freed or moved.

hellioncu

才發(fā)現(xiàn)呀

fender0107401

埋地雷的。

fender0107401

用cscope可以很容易的找到項目里面所有realloc的調用。

egmkang

從來都不用realloc

nizvoo

還好我沒有用過。