background
1.1. Prerequisite knowledge
There are two ways to release the program, debug mode and release mode
Binary programs from Linux gcc/g++, the default is release mode
To use gdb debugging, you must add the -g option when generating the binary program from the source code
Is there a difference in the debugging method on windows?
1. The idea of debugging is the same
2. The operation mode of debugging must be different (command line debugging)
start using
2.1. Install gdb
sudo yum install -y gdb
2.2. Use
gdb binFile exit: ctrl + d or quit /q
2.2.1. Display binFile source code (list/l)
Generally, list/l will remember the number of rows displayed last time, and then go down from the last position, and list 10 rows each time.
list/l [Line number]: From the line number to the following 10 lines.
list/l [function name]: List the source code of a function. Column 10 rows.
2.2.2. Add/delete breakpoint (break/b)
break/b line number: set a breakpoint on a certain line.
delete breakpoints / d: delete all breakpoints delete breakpoints / d [n]: delete the breakpoint with the serial number n (n is not the line number)
info b: view the breakpoint
info (or i) breakpoints: See which breakpoints are currently set
disable breakpoints: disable breakpoints (it will not stop when encountering a breakpoint)
(enable breakpoints) / enable: enable breakpoints
disable breakpoints [Number]: disable a certain breakpoint.
(enable breakpoints) / enable [serial number]: enable a certain breakpoint
2.2.3. View (info) (p) (display)
info b/break : View all current breakpoints.
info/i locals: View the value of local variables in the current stack frame.
p 【变量名】打印变量
display 变量名：跟踪查看一个变量，每次停下来都显示它的值 。（也可以查看地址）
undisplay：全部取消对先前设置的那些变量的跟踪。
undisplay 【序号】：取消对这个变量的跟踪。
2.2.4.运行调试（r/run）（n/next)（s/stop）（c/continue）
run/r：从开始连续而非单步执行程序（调试运行）
n/next：单条执行。 （逐过程）
s/step：进入函数调用（逐语句）
continue/c：从当前位置开始连续而非单步执行程序，也就是从当前位置开始到下一个断点或者结束。
finish：执行完当前函数，然后停下来等待命令 。可以帮我们快速的甄别那个函数出问题了。
until 【行号】：跳至X行。（可能不是预期行，去掉空格/无用的符号）
2.2.5.查看调用堆栈（bt）
bt ：查看调用堆栈。
2.2.6.修改参数的值
set 【var】：修改变量的值，根据我们的需要修改临时变量的值
理解
3.1.f5 / ctrl+f5 / shift+f5
f5：调试运行，有断点直接停下来。 （r/run）
ctrl+f5：不调试执行，在断点不停。
shift+f5：取消调试。（q/quit）
f11：逐个语句（s/step)
f10：逐过程（n/next）