cJSON_Delete();导致 free()：无效指针：0xb5db1e18

Question

代码

    cJSON *body = cJSON_Duplicate(record, true);

    cJSON_AddItemToObject(body, KEY_LOG, log);

    cJSON *array_pl = cJSON_CreateArray();
    cJSON_AddItemToArray(array_pl, body);

    cJSON *payload = cJSON_CreateObject();
    cJSON_AddItemToObject(payload, KEY_PAYLOAD, array_pl);

cJSON_Delete(body);
cJSON_Delete(array_pl);
cJSON_Delete(payload);

每当我使用 cJSON_Delete() 程序崩溃并给出错误 *** Error in `./sample': free(): invalid pointer: 0xb5db1e18 ***

我对此进行了很多搜索，但找不到解决方案。

请告诉我这是如何工作的？

Answer 1

引用自https://github.com/DaveGamble/cJSON，所以请阅读文档。

Important: If you have added an item to an array or an object already, you mustn't delete it with cJSON_Delete. Adding it to an array or object transfers its ownership so that when that array or object is deleted, it gets deleted as well.

参考：Working with the data structure

所以你只需要释放 body 它就会释放里面分配的项目。删除其他两个删除将解决问题。

cJSON_Delete(body);

cJSON_Delete();导致 free()：无效指针：0xb5db1e18

cJSON_Delete(); causes free(): invalid pointer: 0xb5db1e18

c

pointers

memory-leaks

segmentation-fault

cjson