GDB debugging

technological process

# load go Runtime support files runtime-gdb.py
# The file in go Installation directory src/runtime/ Next 
###  Method 1( Each use gdb Automatic loading )  modify ~/.gdbinit file , Add a row ：
add-auto-load-safe-path /opt/go/src/runtime/runtime-gdb.py

###  Method 2( Every time I enter gdb Must be loaded once )  stay gdb The interface executes the following commands :
(gdb) source /opt/go/src/runtime/runtime-gdb.py

# compiler 
go build -gcflags "-N -l" -o mymain main.go

# Get into gdb Debugging interface 
gdb mymain

gdb Debug command

command	function	Example
help [ command ]	Help document	help info
start	Start debugging , Will stop at the program entrance , namely func main()
r	Run the program , Will stop at breakpoint or end of program
l [ Line number / Function name ]	View the source code	l 10
set args	Set runtime parameters	set args 10
show args	Look at the runtime parameters
b [ file name : Line number / Function name ]	To set breakpoints	b 10
d [ Breakpoint number ]	Delete breakpoints	d 1
s	Execute a line of code （ Enter function ）
n	Execute a line of code （ Don't go into functions ）
c	Continue operation , Stop at the next breakpoint or the end of the program
finish	Finished running the current function
p [ Variable name ]	Print variable values	p i
display [ Variable name ]	Tracking variables	display i
undisplay [ Variable number ]	Untracking variables	undisplay 1
info breakpoints	View breakpoint information
info goroutines	see go Process information
info locals	View local variables