From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: David Ahern <dsahern@gmail.com>, Jiri Olsa <jolsa@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: perf probe -L on ubuntu 16.04
Date: Mon, 16 May 2016 22:56:36 -0300 [thread overview]
Message-ID: <20160517015636.GC3455@kernel.org> (raw)
Hi Masami,
Have you ever tried using 'perf probe' on ubuntu?
acme@ubuntu:~/git/linux$ sudo apt-cache search linux-image-$(uname -r)
linux-image-4.4.0-21-generic - Linux kernel image for version 4.4.0 on
64 bit x86 SMP
linux-image-4.4.0-21-generic-dbgsym - Linux kernel debug image for
version 4.4.0 on 64 bit x86 SMP
acme@ubuntu:~/git/linux$
acme@ubuntu:~/git/linux$
So those are installed, but then I try:
root@ubuntu:~# perf probe -vvv -L getname_flags
Looking at the vmlinux_path (8 entries long)
Using /usr/lib/debug/boot/vmlinux-4.4.0-21-generic for symbols
Open Debuginfo file: /usr/lib/debug/boot/vmlinux-4.4.0-21-generic
fname: /build/linux-Ay7j_C/linux-4.4.0/fs/namei.c, lineno:125
New line range: 125 to 2147483647
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path: /build/linux-Ay7j_C/linux-4.4.0/fs/namei.c
Failed to find source file path.
Error: Failed to show lines. Reason: No such file or directory (Code: -2)
root@ubuntu:~#
Couldn't find the source code files, which is the case:
acme@ubuntu:~/git/linux$ dpkg -L linux-image-$(uname -r)-dbgsym | grep
'\.c'
acme@ubuntu:~/git/linux$ dpkg -L linux-image-$(uname -r)-dbgsym | grep
'\.ko' | tail -2
/usr/lib/debug/lib/modules/4.4.0-21-generic/kernel/crypto/pcbc.ko
/usr/lib/debug/lib/modules/4.4.0-21-generic/kernel/crypto/crc32.ko
acme@ubuntu:~/git/linux$
Have to dig deeper to see where the source code is, ideas?
- Arnaldo
next reply other threads:[~2016-05-17 1:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-17 1:56 Arnaldo Carvalho de Melo [this message]
2016-05-19 2:00 ` perf probe -L on ubuntu 16.04 Masami Hiramatsu
2016-05-19 12:06 ` Arnaldo Carvalho de Melo
2016-05-20 3:23 ` Masami Hiramatsu
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