程序接收信号 SIGTRAP，Trace/断点陷阱 [英] Program received signal SIGTRAP, Trace/breakpoint trap

问题描述

I'm debugging a piece of (embedded) software. I've set a breakpoint on a function, and for some reason, once I've reached that breakpoint and continue I always come back to the function (which is an initialisation function which should only be called once). When I remove the breakpoint, and continue, GDB tells me:

Program received signal SIGTRAP, Trace/breakpoint trap.

Since I was working with breakpoints, I'm assuming I fell in a "breakpoint trap". What is a breakpoint trap?

解决方案

Breakpoint trap just means the processor has hit a breakpoint. There are two possibilities for why this is happening. Most likely, your initialization code is being hit because your CPU is resetting and hitting the breakpoint again. The other possibility would be that the code where you set the breakpoint is actually run in places other than initialization. Sometimes with aggressive compiler optimization it can be hard to tell exactly which code your breakpoint maps to and which execution paths can get there.

这篇关于程序接收信号 SIGTRAP，Trace/断点陷阱的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！