博客

启动环境

gdb main

按行号打断点

break 7

按函数名打断点

break anyFunctionWithSourceCode

启动程序

run

带参数启动

run -c config.json

打印变量

print I_am_a_int

变量赋值

set I_am_a_int = 5

调用函数，打印返回值

print compute_sum(I_am_a_int , I_am_a_int)

如果报错

Cannot resolve function compute_sum to any overloaded instance

输入

set overload-resolution off

注意函数参数必须是已在内存里的变量

否则报错

Attempt to take address of value not located in memory

在特定文件打断点

break filename:codeline

如果是在动态库里，提示

Make breakpoint pending on future shared library load? (y or [n])

时选择y

后续介绍如何调试一个会崩溃的程序，通过查询堆栈定位崩溃点