On 05/25/15 08:02, B Cran wrote: > On May 24, 2015 9:31 PM, "lidonglin" <lidong...@huawei.com > <mailto:lidong...@huawei.com>> wrote: >> >> Thanks for your reply. >> >> This method maybe only can print some log to serial. Is there any way > to control ovmf work flow like step by step debug? > > You can run qemu with the embedded gdb server and with a bit of setup > using scripts mentioned a while ago on this list be able to step through > OVMF code in gdb or any other gdb-compatible debugger with full symbols. > I don't have the details available right now but if you're interested I > can find them.
Bruce, what happened to the nice summary you had put up under: http://edk2.bluestop.org/w/tianocore/debugging-with-gdb/ (announced in <http://thread.gmane.org/gmane.comp.bios.tianocore.devel/12045/focus=12091>)? Li Donglin, in any case, please see http://thread.gmane.org/gmane.comp.bios.tianocore.devel/7424 FWIW, when hunting for a bug, I never bother to go through the hurdles described in that email :) I just add DEBUGs. They work very well. The trick is to insert *many* DEBUG (("%a: %d\n", __FUNCTION__, __LINE__)); statements in a function that is known to be entered. Such statements should be added at the boundaries of basic blocks <http://en.wikipedia.org/wiki/Basic_block>. Such a debug log is very useful for control flow analysis (especially with a cscope- or ctags-compatible editor, when you can jump to functions by name), plus one can easily dig down to other functions / log other variables too, in the next round. In many cases I find it more useful than traditional interactive debugging -- with interactive debugging you frequently wish you had a log. Laszlo ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel
