如何在Windows中使用MinGW gdb调试器调试C ++程序？ [英] How do I use the MinGW gdb debugger to debug a C++ program in Windows?

问题描述

我已经找到了这个文件，没有发现任何内容。我已经安装MinGW，它的效果很好。我只是不知道如何使用调试器。

I have looked for documentation on this and found nothing. I have MinGW installed and it works great. I just don't know how to use the debugger.

给出一些简单的代码，在一个名为mycode.cpp的文件中说：

Given some simple code, say in a file called "mycode.cpp":

int main()
{
    int temp = 0;

    for (int i = 0; i < 5; ++i)
        temp += i;

    return 0;
}

...我如何调试这个。在Windows中使用MinGW和GDB调试代码的命令是什么？我可以通过Visual Studio中的命令行来遍历代码吗？如果是这样，我使用什么命令？

...how would I debug this. What are the commands that I use to debug code with MinGW and GDB in windows? Can I step through the code via the command line like in Visual Studio? If so what commands do I use to do that?

有没有使用GDB的教程？我找不到任何东西，但是如果有人可以指导我，那也是伟大的。我厌倦了大量的 std :: cout 语句来调试复杂的代码。

Are there any tutorials for using GDB out there? I couldn't find any, but if anyone could direct me to one that would be great too. I'm tired of writing tons of std::cout statements to debug complex code.

推荐答案

第一步是使用 -g 编译您的程序，以便在可执行文件中包含调试信息：

The first step is to compile your program with -g to include debugging information within the executable:

g++ -g -o myprog.exe mycode.cpp

然后该程序可以加载到 gdb 中：

Then the program can be loaded into gdb:

gdb myprog.exe

有几个命令让您开始：

• break main 将导致调试器中断。您还可以使用 break FILENAME：LINENO 打破代码行。例如，当$ code> mycode.cpp 的第4行时， break mycode.cpp：4 li>
  
• 开始启动程序。在您的情况下，您需要在启动程序之前设置断点，因为它会很快退出。

• break main will cause the debugger to break when main is called. You can also break on lines of code with break FILENAME:LINENO. For example, break mycode.cpp:4 breaks execution whenever the program reaches line 4 of mycode.cpp.
• start starts the program. In your case, you need to set breakpoints before starting the program because it exits quickly.

在断点处：

• 打印VARNAME 。这就是打印变量的值，无论是本地的，静态的还是全局的。例如，在 for 循环中，您可以键入 print temp 以打印出 temp 变量


• step 这相当于进入
  
• next 或 adv +1 提前到下一行（如过渡） 。您也可以前往特定文件的特定行，例如 adv mycode.cpp：8 。


• bt 打印回溯。这是一个堆栈跟踪，基本上是。


• 继续完全像视觉调试器的继续操作。它导致程序执行继续，直到下一个断点或程序退出。

• print VARNAME. That's how you print values of variables, whether local, static, or global. For example, at the for loop, you can type print temp to print out the value of the temp variable.
• step This is equivalent to "step into".
• next or adv +1 Advance to the next line (like "step over"). You can also advance to a specific line of a specific file with, for example, adv mycode.cpp:8.
• bt Print a backtrace. This is a stack trace, essentially.
• continue Exactly like a "continue" operation of a visual debugger. It causes the program execution to continue until the next break point or the program exits.

最好的事情是 GDB用户手册。

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