Неверное чтение размера 1 в c valgrind - PullRequest
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Неверное чтение размера 1 в c valgrind

1 голос
/ 04 августа 2020

Я получаю ошибку сегментации при запуске моей программы. Я пробовал отладку с помощью инструмента valgrind. Программа запускается так: 

errors_e read_limits_epic_data_from_db()
{
   char sql[MAX_SIZE] = {}
   generate_sql_query_for_epic_cache(sql, db_sys_params)
}

generate_sql_query_for_epic_cache выглядит так: 

char * generate_sql_query_for_epic_cache(char *buffer, db_sys_params_t *db_sys_params)
{
    char *limit_table_name = NULL;
    char *sql_frmt = "select * from %s where Key %s '%s'";
    char key_epic[MAX_SIZE];
    char *condition = " = ";
    if (db_sys_params->shelf == DS14) {
            condition = " like ";
    }
    if (db_sys_params->hw_vendor == LE) {
            limit_table_name = "CSI_EPIC_LE_LIMITS";
    }
    else if(db_sys_params->hw_vendor == FU) {
            limit_table_name = "CSI_EPIC_FU_LIMITS";
    }
    else {
          limit_table_name = "CSI_EPIC_LIMITS";
    }
    get_epic_key(key_epic,db_sys_params);
    snprintf(buffer, MAX_SIZE, sql_frmt, limit_table_name, condition, key_epic);
    return buffer;
    }

get_epic_key выглядит так: 

char * get_epic_key(char *buffer, db_sys_params_t *db_sys_params)
{
    char *frmt = "%s%s%s%s%s";
    char *mode = get_epic_mode_name_equivalent_to_csi(db_sys_params);
    char *version = get_on_version_equivalent_to_csi(db_sys_params);
    char *shelf = get_shelf_type_name_maping(db_sys_params->shelf);
    if (db_sys_params->shelf == INTERNAL) {
           shelf = get_internal_shelf_name_maping(db_sys_params->platform);
    }
    snprintf(buffer, MAX_SIZE,frmt, mode, version,
                    get_platform_name_maping(db_sys_params->platform),
                    shelf,
                    get_drive_name_maping(db_sys_params->drive));
    return buffer;
}

Valgrind говорит: 

=5241== Thread 11:
==5241== Invalid read of size 1
==5241==    at 0x3295847D0C: vfprintf (in /lib64/libc-2.12.so)
==5241==    by 0x329586F631: vsnprintf (in /lib64/libc-2.12.so)
==5241==    by 0x329584F102: snprintf (in /lib64/libc-2.12.so)
==5241==    by 0x5A9BB9: generate_sql_query_for_epic_cache (cache.c:85)
==5241==    by 0x5AA592: read_on_limits_epic_data_from_db (cache.c:239)
==5241==    by 0x586037: insert_on_limit_record_in_ultra_cache (ultra_cache.c:81)
==5241==    by 0x5868B3: init_ultra_cache_on_limit_epic (ultra_cache.c:213)
==5241==    by 0x586A5B: init_db_ultra_cache (ultra_cache.c:248)
==5241==    by 0x59D577: do_sizing (ws.c:3585)
==5241==    by 0x405F3F: csi2__getsizing_json (forward_sizer.c:529)
==5241==    by 0x49D7B1: soap_serve_csi2__getsizing_json (soapServer.c:156)
==5241==    by 0x49CD75: soap_serve_request (soapServer.c:87)
==5241==  Address 0x7802d30 expected vs actual:
==5241==  Expected: unknown
==5241==  Actual:   stack array "key_epic" of size 1,024 in frame 3 back from here

MAX_SIZE определяется как: #define MAX_SIZE 1024

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