void dataProcess::loginProcess(byte* packet, uint16_t length)
{
unique_ptr<ResultSet> res;
unique_ptr<Statement> stmt;
byte idPacket[4] = {packet[9], packet[8], packet[7], packet[6]};
uint32_t id, account_id;
string account_pass, account_type;
id = decodeToInt(idPacket, 4);
account_pass = decodeToChar(packet, 14, length - 1);
account_type = decodeToChar(packet, 10, 11);
stmt.reset(this->con->createStatement());
res.reset(stmt->executeQuery("SELECT * FROM account_info"));
while(res->next())
{
account_id = res->getUInt("id");
if(lowerCase(account_type).compare("ts") == 0)
{
if((account_id == id) && (account_pass.compare(res->getString("password")) == 0))
{
sendPacket("F4440300010300");
}
else
{
wrongPass();
}
}
else
{
wrongPass();
}
}
}
所以上面的函数在无限循环的每次迭代中被调用一次,并且函数总是在第二次迭代时失败。我认为这在某种程度上与第一次迭代时删除 ResultSet 对象有关,因为当我尝试使用普通指针并使用 delete 语句时,会出现同样的问题,但如果我删除删除,它可以通过第二次迭代,但我'我很确定根据MySQL网站上的示例需要删除ResultSet。我对 mysql Connector/C++ 很陌生,所以我不确定是什么导致了这个问题。从调试来看,它似乎在第二次迭代的这一行失败了。
res.reset(stmt->executeQuery("SELECT * FROM account_info"));
这是程序进入第二次迭代后出现的错误
Error in `./server': free(): invalid size: 0x00007f8214004ca0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x790cb)[0x7f8219aa70cb]
/lib/x86_64-linux-gnu/libc.so.6(+0x8275a)[0x7f8219ab075a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7f8219ab418c]
/usr/lib/x86_64-linux-gnu/libmysqlcppconn.so.7(_ZN5boost20checked_array_deleteIc EEvPT_+0x1f)[0x7f821a9397df]
/usr/lib/x86_64-linux-gnu/libmysqlcppconn.so.7(_ZN5boost12scoped_arrayIcED1Ev+0x 1b)[0x7f821a9390b5]
/usr/lib/x86_64-linux-gnu/libmysqlcppconn.so.7(_ZN3sql5mysql15MySQL_ResultSetC2E N5boost10shared_ptrINS0_9NativeAPI22NativeResultsetWrapperEEENS2_8weak_ptrINS4_2 3NativeConnectionWrapperEEENS_9ResultSet9enum_typeEPNS0_15MySQL_StatementERNS3_I NS0_17MySQL_DebugLoggerEEE+0x205)[0x7f821a98cde3]
/usr/lib/x86_64-linux-gnu/libmysqlcppconn.so.7(_ZN3sql5mysql15MySQL_Statement12e xecuteQueryERKNS_9SQLStringE+0x11b)[0x7f821a99443f]
./server(+0x326e)[0x56192448126e]
./server(+0x2f40)[0x561924480f40]
./server(+0x2da3)[0x561924480da3]
./server(+0x2a45)[0x561924480a45]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ca)[0x7f8219dfc6ca]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f)[0x7f8219b360af]
类和构造函数:
class dataProcess : public thread
{
public:
dataProcess(int sock);
virtual ~dataProcess();
protected:
virtual void thread_handler();
private:
void wrongPass();
void loginProcess(byte* packet, uint16_t length);
void sendPacket(string packet);
int sock;
player* p;
Driver* driver;
unique_ptr<Connection> con;
};
dataProcess::dataProcess(int sock)
{
this->sock = sock;
driver = get_driver_instance();
con.reset(driver->connect("localhost", "root", "password"));
con->setSchema("ts_server");
thread::startThread();
}
最佳答案
好的,伙计们,我已经解决了这个问题,作为新手,我学到了非常重要的一课。问题的发生是由于我粗心大意导致的未定义行为,以确保我“删除了所有动态分配的变量”一旦我在正确的位置添加了删除,一切都完美无缺。所以任何遇到这类随机问题的人一定要检查这些:)
关于c++ - while 循环中的 MySQL Connector/C++ 错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41420962/