Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 17 Jul 2015 12:14:47 +0800 | From | "Wangnan (F)" <> | Subject | Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event |
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On 2015/7/17 12:11, Alexei Starovoitov wrote: > On 7/14/15 4:54 AM, He Kuang wrote: >>> I'm not sure llvm generates proper dwarf along with bpf code (I didn't >>> test that part. If there are any issues they should be fixable. If you >>> can prepapre a patch for llvm that would be even better :) >>> >> >> I found objdump can't get dwarf info from bpf object file: >> >> $ objdump --dwarf=info bpf.o >> bpf.o: file format elf64-little >> >> $ readelf -a bpf.o |grep debug_info >> <EMPTY> > > yeah. looks like this part is not working. > Interesting that when I do: clang -O2 -target bpf a.c -g -S > there is some minimal debug info in the .s, but .o lacks > debuginfo completely. Digging further...
Glad to see you start look at it. We are not familiar with LLVM, but I was told that LLVM has a clean structure and very easy to introduce new features. Could you please give us some hits on it so we can work together?
Thank you.
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