Gdb debugging common concepts finishing

GDB 调试模型

There are two main debug models：Code debugging tracking and optimization（一）--- 如何用GDB 调试代码？_流云IoT的博客-CSDN博客

1. 本地调试：调试程序和被调试程序运行在同一台电脑中.
   
   
    
2. 远程调试：调试程序运行在一台电脑中,被调试程序运行在另一台电脑中（Or an embedded development board）.红线表示GDB（也叫host）与GdbServer（也叫target）之间通过串口线或者网络进行通讯（GdbServerPort monitoring will be performed,比如3333,GDB进行remote target 3333Connect like this）,用于传输GDB 调试消息的通讯协议可以称为GDB Remote Serial Protocol(GDB RSP).GDP RSP The message mainly includes four parts,Fixed start character(’$’)和结束字符(’#’),Intermediate debug message data and final checksum.可参阅文档：Howto: GDB Remote Serial
   
   
   
   注意：就算GDBand the debugged program on one computer,We can still use this remote debugging method.

 

GDB 调试功能

GDB 主要有2debug function：

1. gdb program：使用GDB Start executing the debugged programprogram,可通过GDB 命令控制program 的行为;
   还可以：gdb program core：使用GDB Execute the debugged program at the same timeprogram 和core 文件（When a program aborts or exits abnormally,Saved memory image plus debug info file,Contains the program's current memory、寄存器、堆栈等信息）,It is convenient to locate the cause of the abnormal abort or exit of the analyzer;
2. gdb attach PID (gdb -p PID)：使用GDB 接管(attach)一个正在运行的被调试程序,PID for the program being debuggedprocess-ID（可通过pidof program 查看）,可通过GDB 命令控制program 的行为.
    

 

GDB Debug command interface type

主要有3种接口：About the debugger and IDE的一些认识_标biao的博客-CSDN博客_ide调试器

1. cll接口,就是用户接口,我们在命令行执行gdb进行调试,Enter the next step,Commands such as breakpoints,Even this interface
2. mi接口,That is, the machine interface,To be someone else'sIDEThe backend sends commands（很多主流IDE都是用这个）.
3. 还有个emacsEditor version of the interface,It is estimated that it is for the editordiyFor lovers.

参考文章：

Embedded debuggingGDB使用_标biao的博客-CSDN博客_gdb 嵌入式

系统gdbKernel debugging application breakpoint single-step debugging principle_标biao的博客-CSDN博客_gdbThe principle of single-step debugging

gdbThe use of and command encyclopedia read debugging information directly in non-debugging state_标biao的博客-CSDN博客 

Summary of processor debugging breakpoint principle_标biao的博客-CSDN博客

GDB实现原理_标biao的博客-CSDN博客_gdb实现原理 

关于ELFInterpretation of debugging information in the format file_标biao的博客-CSDN博客_elf调试信息