参考：

08 调试利器GDB（下）https://www.cnblogs.com/lh03061238/p/13177510.html

使用GDB进行断点调试  https://www.cnblogs.com/-glb/p/12514577.html

breakpoint和watchpoint的区别 https://www.jianshu.com/p/9462a5280004

About breakpoints and watchpoints  https://www.cnblogs.com/zjbfvfv/p/11949201.html

breakpoint和watchpoint/data breakpoint https://blog.csdn.net/gengshenghong/article/details/7404296

 gdb 和 watchpoint  http://www.kgdb.info/gdb_watchpoint/

Notes on Hardware Breakpoints and Watchpoints  https://aarzilli.github.io/debugger-bibliography/hwbreak.html

gdb里的软件观察点 (software watchpoint) 和硬件观察点 (hardware watchpoint)区别 https://blog.csdn.net/geekster/article/details/6641099

gdb 系列(1) (hwbreakpoint\watchpoint) https://blog.csdn.net/green369258/article/details/55510650