swig/python 检测到“uint32_t *”类型的内存泄漏，没有找到析构函数

Posted 2023-02-23

【中文标题】swig/python 检测到“uint32_t *”类型的内存泄漏，没有找到析构函数

【英文标题】：swig/python detected a memory leak of type 'uint32_t *', no destructor found

【发布时间】：2016-12-04 14:07:01

【问题描述】：

当我编辑或打印结构中的字段时，我得到了关于内存泄漏的上述错误，但如果我使用像下面的 xx 这样的简单变量，则没有内存泄漏。 这是为什么呢？

文件 rc_test.py：

   import sys
    import verbs_utils
    import logging
    logger = logging.basicConfig(level=logging.DEBUG)

    class rc_pingpong():
        def __init__(self, link_partner_hostname=None):
            self.attr = verbs_utils.ibv_qp_attr()
            self.init_to_rts()

        def init_to_rts(self):
            self.attr = verbs_utils.ibv_qp_attr()
            logging.debug("<DEBUG: init_to_rts>, self.attr = ".format(self.attr))
            logging.debug("<DEBUG: init_to_rts>, self.attr.path_mtu = ".format(self.attr.path_mtu))
            logging.debug("<DEBUG: init_to_rts>, self.attr.min_rnr_timer = ".format(self.attr.min_rnr_timer))
            logging.debug("<DEBUG: init_to_rts>, self.attr.qp_state = ".format(self.attr.qp_state))
            logging.debug("<DEBUG: init_to_rts>, self.attr.port_num = ".format(self.attr.port_num))

            xx = self.attr.dest_qp_num
            verbs_utils.set_intp_val(xx , 7)
            verbs_utils.print_intp_val(xx)
            self.attr.dest_qp_num = xx
            #logging.debug("<DEBUG: init_to_rts>, +++++++++ self.attr.dest_qp_num = ".format(self.attr.dest_qp_num))
            verbs_utils.print_intp_val(self.attr.dest_qp_num)
            verbs_utils.print_intp_val(self.attr.dest_qp_num)

文件：verbs_utils.c

    struct ibv_qp_attr 
        uint32_t        qkey;
        uint32_t        rq_psn;
        uint32_t        sq_psn;
        uint32_t        dest_qp_num;
    ;

   void set_intp_val(uint32_t* p, int val)
    
        *p = val;
        printf("----------------------------------------------\n");
        printf("<DEBUG : xxxxxxset_intp_val>, p = %d\n", p);
        printf("<DEBUG : xxxxxxset_intp_val>, val = %d\n", val);
        printf("<DEBUG : xxxxxxset_intp_val>, *p = %d\n", *p);
        printf("----------------------------------------------\n");
    
    void print_intp_val(uint32_t* p)
    
        printf("----------------------------------------------\n");
        printf("<DEBUG : xxxxxxset_intp_val>, *p = %d\n", *p);
        printf("<DEBUG : xxxxxxset_intp_val>, p = %d\n", p);
        printf("----------------------------------------------\n");
    

输出：

----------------------------------------------
<DEBUG : xxxxxxset_intp_val>, p = 8431360
<DEBUG : xxxxxxset_intp_val>, val = 7
<DEBUG : xxxxxxset_intp_val>, *p = 7
----------------------------------------------
----------------------------------------------
<DEBUG : xxxxxxset_intp_val>, *p = 7
<DEBUG : xxxxxxset_intp_val>, p = 8431360
----------------------------------------------
----------------------------------------------
<DEBUG : xxxxxxset_intp_val>, *p = 7
<DEBUG : xxxxxxset_intp_val>, p = 8967344
----------------------------------------------
swig/python detected a memory leak of type 'uint32_t *', no destructor found.
----------------------------------------------
<DEBUG : xxxxxxset_intp_val>, *p = 7
<DEBUG : xxxxxxset_intp_val>, p = 9753776
----------------------------------------------
swig/python detected a memory leak of type 'uint32_t *', no destructor found.

【参考方案1】：

尝试将%include "stdint.i" 添加到接口文件的顶部。