c++ - 我的 gcov 报告中出现神秘函数

Question

一个神秘的函数 Function '_ZNSsaSERKSs' 出现在我的 gcov 报告中，我完全不知道它是什么，有人可以向我解释发生了什么吗

谢谢

头文件

#ifndef CASHIER_H
#define CASHIER_H
#include <string>
using namespace std;


class cashier 
{
public:

        void setID(string);
    string getID();

    void setPassword(string);
    string getPassword();

    void settries(int);
    int gettries();
        void increase_tries();

private:
    string ID;
    string Password;
    int tries;



};

#endif  /* CASHIER_H */

执行文件

#include "cashier.h"




void cashier::setID(string value)
{
    this->ID = value;
}

void cashier::setPassword(string value)
{

    this->Password = value;

}

string cashier::getID()
{
    return this->ID;
}

string cashier::getPassword()
{
    return this->Password;
}

void cashier::settries(int value)
{
    this->tries=value;
}
int cashier::gettries()
{
    return this->tries;
}
void cashier::increase_tries()
{
    this->tries = this->tries + 1 ;

}

我输入以下命令

gcov -f cashier.gnco

我得到了如下结果B

Function '_ZN7cashier8settriesEi' 
Lines executed:100.00% of 3       


Function '_ZN7cashier8gettriesEv'
Lines executed:100.00% of 2

Function '_ZN7cashier14increase_triesEv'
Lines executed:100.00% of 3

Function '_ZN7cashier11getPasswordEv'
Lines executed:100.00% of 2

Function '_ZN7cashier5getIDEv'
Lines executed:100.00% of 2

Function '_ZNSsaSERKSs' //mysterious function
Lines executed:0.00% of 2

Function '_ZN7cashier11setPasswordESs'
Lines executed:100.00% of 3

Function '_ZN7cashier5setIDESs'
Lines executed:100.00% of 3

File 'cashier.cpp'
Lines executed:100.00% of 18
cashier.cpp:creating 'cashier.cpp.gcov'

File '/usr/include/c++/4.4/bits/basic_string.h'
Lines executed:0.00% of 2
/usr/include/c++/4.4/bits/basic_string.h:creating 'basic_string.h.gcov'





 File '/usr/include/c++/4.4/bits/basic_string.h'
    Lines executed:0.00% of 2
    No branches
    Calls executed:0.00% of 1
    /usr/include/c++/4.4/bits/basic_string.h:creating 'basic_string.h.gcov

编辑

Answer 1

使用 c++filt 分解名称给出

std::string::operator=(std::string const&)

std::string 的复制赋值运算符。