From: Alexei Starovoitov <ast@plumgrid.com>
To: He Kuang <hekuang@huawei.com>, pi3orama <pi3orama@163.com>,
Namhyung Kim <namhyung@kernel.org>
Cc: "rostedt@goodmis.org" <rostedt@goodmis.org>,
"masami.hiramatsu.pt@hitachi.com"
<masami.hiramatsu.pt@hitachi.com>,
"acme@kernel.org" <acme@kernel.org>,
"a.p.zijlstra@chello.nl" <a.p.zijlstra@chello.nl>,
"mingo@redhat.com" <mingo@redhat.com>,
"jolsa@kernel.org" <jolsa@kernel.org>,
"wangnan0@huawei.com" <wangnan0@huawei.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
Date: Thu, 16 Jul 2015 21:11:49 -0700 [thread overview]
Message-ID: <55A88085.8090407@plumgrid.com> (raw)
In-Reply-To: <55A4F869.1020705@huawei.com>
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...
next prev parent reply other threads:[~2015-07-17 4:11 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 10:03 [RFC PATCH v4 0/3] Make eBPF programs output data to perf event He Kuang
2015-07-10 10:03 ` [RFC PATCH v4 1/3] tracing/events: Fix wrong sample output by storing array length instead of size He Kuang
2015-07-17 14:32 ` Steven Rostedt
2015-07-17 17:24 ` Sara Rostedt
2015-07-17 18:13 ` Steven Rostedt
2015-07-23 19:36 ` Alex Bennée
2015-07-10 10:03 ` [RFC PATCH v4 2/3] tools lib traceevent: Add function to get dynamic arrays length He Kuang
2015-07-10 10:03 ` [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event He Kuang
2015-07-10 22:10 ` Alexei Starovoitov
2015-07-13 4:36 ` He Kuang
2015-07-13 13:52 ` Namhyung Kim
2015-07-13 14:01 ` pi3orama
2015-07-13 14:09 ` Namhyung Kim
2015-07-13 14:29 ` pi3orama
2015-07-14 1:43 ` Alexei Starovoitov
2015-07-14 11:54 ` He Kuang
2015-07-17 4:11 ` Alexei Starovoitov [this message]
2015-07-17 4:14 ` Wangnan (F)
2015-07-17 4:27 ` Alexei Starovoitov
2015-07-23 11:54 ` He Kuang
2015-07-23 20:49 ` llvm bpf debug info. " Alexei Starovoitov
2015-07-24 3:20 ` Alexei Starovoitov
2015-07-24 4:16 ` He Kuang
2015-07-25 10:04 ` He Kuang
2015-07-28 2:18 ` Alexei Starovoitov
2015-07-29 9:38 ` He Kuang
2015-07-29 17:13 ` Alexei Starovoitov
2015-07-29 20:00 ` pi3orama
2015-07-29 22:20 ` Alexei Starovoitov
2015-07-31 10:18 ` Wangnan (F)
2015-07-31 10:20 ` [LLVM PATCH] BPF: add FRAMEADDR support Wang Nan
2015-07-31 10:21 ` [LLVM CLANG PATCH] BPF: add __builtin_bpf_typeid() Wang Nan
2015-07-31 10:48 ` llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event pi3orama
2015-08-03 19:44 ` Alexei Starovoitov
2015-08-04 9:01 ` Cc llvmdev: " Wangnan (F)
2015-08-05 1:58 ` Wangnan (F)
2015-08-05 2:05 ` Wangnan (F)
2015-08-05 6:51 ` [LLVMdev] " Wangnan (F)
2015-08-05 7:11 ` Alexei Starovoitov
2015-08-05 8:28 ` Wangnan (F)
2015-08-06 3:22 ` [llvm-dev] " Alexei Starovoitov
2015-08-06 4:35 ` Wangnan (F)
2015-08-06 6:55 ` Alexei Starovoitov
2015-08-12 2:34 ` Wangnan (F)
2015-08-12 4:57 ` [llvm-dev] " Alexei Starovoitov
2015-08-12 5:28 ` Wangnan (F)
2015-08-12 13:15 ` Brenden Blanco
2015-08-13 6:24 ` Wangnan (F)
2015-08-05 8:59 ` [LLVMdev] Cc llvmdev: " He Kuang
2015-08-06 3:41 ` [llvm-dev] " Alexei Starovoitov
2015-08-06 4:31 ` Wangnan (F)
2015-08-06 6:50 ` Alexei Starovoitov
2015-07-13 8:29 ` Peter Zijlstra
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