将std :: map作为参数传递给虚拟函数调用时，会发生EXC_BAD_ACCESS（code = 1，address = 0x0）

问题描述

我有一个具有以下虚函数的类

I have a class that has the following virtual function

namespace Book
{
class Secure
{
virtual Result setPassword(const std::map<std::string, std::vector<std::string> >& params)=0;

}
}

我还有另一个测试类，其中一种方法从excel获取密码和用户名，并将其设置为map secureParams并设置当前文件的密码。

I have another test class in which a method gets the password and user name from the excel and sets it to the map secureParams and sets the password for the current file.

bool initialize(std::string bookPath, std::string loginPath, std::string userName, std::string password)

{
Book::SharedPtr<Book::Secure> secure;
bool result;
std::map<std::string, std::vector<std::string> > secureParams;

std::vector<std::string> userNames;
std::vector<std::string> passwords;

userNames.push_back(userName);
passwords.push_back(password);

secureParams.insert(std::pair<std::string, std::vector<std::string>>("USERNAME",userNames);
secureParams.insert(std::pair<std::string, std::vector<std::string>>("PASSWORD",passwords);

secure->setPassword(secureParams);

secure->getLoginFile(loginPath.c_str());

result=Book::SecureBook::canLogin(bookPath.c_str(),secure);

return result;

}

运行时代码终止未知文件：故障
测试主体中引发了未知的C ++异常。

The code when run terminates saying Unknown File: FailureUnknown C++ exception thrown in test body.

在XCode中进行调试时，它显示出EXC_BAD_ACCESS（code = 1，address = 0xc0000000）错误行secure-> setPassword（secureParams）;

When debugged in XCode it shows a EXC_BAD_ACCESS(code=1,address=0xc0000000) error in the line secure->setPassword(secureParams);

我整天都在尝试调试问题。感谢您的帮助：）

I have been trying to debug the issue all day. Any help is appreciated :)

预先感谢：）

推荐答案

您似乎没有从Book继承的对象::安全，只是抽象的聪明指针ct基类。当取消引用从未设置为指向实际对象的智能指针时，会崩溃。

You don't seem to have an object that inherits from Book::Secure, just a smart pointer to the abstract base class. When you dereference the smart pointer that has never been set to point to an actual object, you get a crash.

说明：

1）您需要一个从Book :: Secure

1) You need an instantiable class that inherits from Book::Secure

namespace Book
{

class Foo : public Secure
{
public:
virtual Result setPassword(const std::map<std::string, std::vector<std::string> >& params) {
  cout << "setPassword called" << endl; 
}
}
}

2）您需要实例化该类，并在使用智能指针之前使您的智能指针指向它：

2) You need to instantiate the class and make your smart pointer point to it before you use the smart pointer:

secure.reset( new Foo() );

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