Thank for reply, I will try to use it. It is pretty if you would like to give some use guidance or an example with this patch.
-----邮件原件----- 发件人: Boris Shingarov [mailto:shinga...@labware.com] 发送时间: 2021年4月21日 16:39 收件人: gem5 users mailing list <gem5-users@gem5.org> 抄送: Liyichao <liyic...@huawei.com>; Gabe Black <gabe.bl...@gmail.com> 主题: Re: [gem5-users] Re: How to debug a program in GEM5 FS mode. Liyichao, In fact, our group have been using that change since at least 2014 and it holds up in pretty complex debugging scenarios. I hope it will be merged soon. I would be really interested to hear whether it will help in your scenario. Boris -----"Gabe Black via gem5-users" <gem5-users@gem5.org> wrote: ----- To: "Liyichao" <liyic...@huawei.com> From: "Gabe Black via gem5-users" <gem5-users@gem5.org> Date: 04/21/2021 02:27AM Cc: "gem5 users mailing list" <gem5-users@gem5.org>, "Gabe Black" <gabe.bl...@gmail.com> Subject: [gem5-users] Re: How to debug a program in GEM5 FS mode. Yeah, I don't think gdb in SE mode handles page faults well, but there was actually a change proposed very recently which should help improve that. You can probably cherry-pick that change locally if you want to try it out. https://gem5-review.googlesource.com/c/public/gem5/+/44685 Gabe On Tue, Apr 20, 2021 at 11:16 PM Liyichao <liyic...@huawei.com> wrote: Thanks Gabe. I think run gdb inside gem5 is of course a better method but slow speed. In se mode，I also have tried it，but my program in se mode has a page fault panic before segment fault.I think se mode cannot process page fault. 李翼超 charlie Mobile：+86-15858232899 Email：liyic...@huawei.com 发件人： Gabe Black<gabe.bl...@gmail.com> 收件人： gem5 users mailing list<gem5-users@gem5.org> 抄送： Liyichao<liyic...@huawei.com> 主题： Re: [gem5-users] How to debug a program in GEM5 FS mode. 时间： 2021-04-21 14:06:58 Hello, Liyichao. While gdb debugging in gem5 is a great tool, it's a bit limited as far as the sort of debugging you're talking about. It can see the CPU state when you're in user space programs, but it doesn't understand that different user space programs are different things, or know how to look up their symbols, etc. It's intended primarily for debugging the kernel, since that's frankly a more tractable problem. It would be possible to extend that support to give it more insight into what's going on inside the kernel so it can do more in that regard, and while I'd like to do that at some point, that's not anything that will happen soon. If you want to debug a user space program inside gem5, I think your best bet is to debug it in SE mode where the only thing running is your program. SE mode is more approximate than FS mode and can't run every program, but if it can run yours that's probably what you'll want to do. Another option would be to run gdb *inside* gem5, as part of the simulation. I don't know if anybody has tried that, but then gdb should work like it would on a real ARM host, more or less. Gabe On Tue, Apr 20, 2021 at 7:27 PM Liyichao via gem5-users <gem5-users@gem5.org> wrote: Hi All: I am currently debugging a program with an SVE instruction in the FS mode of GEM5. However, a segment error occurs in the program. Therefore, I want to locate which instruction is causing the error and check the contents of the register of the error instruction. What are the debugging methods of GEM5 for applications in FS mode? Because programs with SVE instructions cannot be debugged directly on the ARM server, I want to debug in FS mode of GEM5. Does the Remote GDB support the preceding operations? Are there detailed instructions for REMOTE GDB? The Remote GDB guidance on the GEM5 website is a little brief. TKS. _______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s _______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s _______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
