一些有用的GDB命令:
help <command> - displays help
b <filename:linenumber> - breakpoint
disable b <breakpoint> - disable breakpoint
enable b <breakpoint> - enable breakpoint
info b - info on breakpoints
si - step one instruction
s - step till new source line
ni - next instruction (step over)
n - next line (step over)
r - run
c - continue
fi - execute till return
print <var> - prints value of variable
set <var> - change value of the variable在GDB中打开imgRead_afl，用r选项提供崩溃文件路径，如下所示:
$ gdb ./imgRead_afl
(gdb) r out/crashes/id:000000,sig:06,src:000000,op:havoc,rep:128