Em Tue, Mar 03, 2015 at 05:50:26PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Mar 03, 2015 at 12:54:26PM -0700, David Ahern escreveu:
> > On 3/3/15 12:27 PM, Yuanfang Chen wrote:
> > >On Tue, Mar 3, 2015 at 11:23 AM, Arnaldo Carvalho de Melo wrote:
> > >>Em Tue, Mar 03, 2015 at 11:07:18AM -0500, Yuanfang Chen escreveu:
> > >>>Recently after updating perf package, I found the 'ip' in 'perf
> > >>>script' like below is shorter than before. Also feeding that address
> > >>>(like 57e below) to addr2line does not output filename:lineno
> > >>>information anymore. How do I fix this issue? Is this a bug?
>
> > >>Yeah, I tried using it with addr2line and it didn't work :-\ So what
> > >>you're saying is that in the past it worked like that?
>
> > >>If so, could you please 'git bisect' it to find out when it got broken?
>
> > >Yeah, it worked in the past.
> > >commit 5550171b2a9f8df26ff483051d060db06376b26d change ip into
> > >relative address ( not sure relative to which address), which makes
> > >addr2line unable to parse.
>
> > That's Andi's commit.
>
> Oh well, that, IIRC, was done to make the srcline sort key to work, but
> broke the perf script output, so perhaps its time to change the perf
> script output to use that code and show srcline:lineno, will see.
So 'perf script' allows one to ask for a srcline as one of its fields,
it is in the man page, not in the OPTION help, and it is broken,
possibly by Andi's commit as well, unsure:
[acme@zoo linux]$ perf script -f comm,tid,time,ip,sym,srcline
:29199 29199 59715.176367: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
:29199 29199 59715.176368: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
:29199 29199 59715.176368: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
:29199 29199 59715.176369: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
usleep 29200 59715.176897: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
swapper 0 59715.177306: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
swapper 0 59715.177307: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
swapper 0 59715.177308: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
swapper 0 59715.177308: ffffffff8109fe42
ttwu_do_wakeupaddr2line_init failed for
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
[kernel.vmlinux][ffffffff8109fe42]
[acme@zoo linux]$
[acme@zoo linux]$ readlink -f
/home/acme/.debug/.build-id/9c/657619efb47cd8eb1a825865ba3a26cf709e98
/home/acme/.debug/home/git/build/v3.19-rc6+/vmlinux/9c657619efb47cd8eb1a825865ba3a26cf709e98
[acme@zoo linux]$ file
/home/acme/.debug/home/git/build/v3.19-rc6+/vmlinux/9c657619efb47cd8eb1a825865ba3a26cf709e98
/home/acme/.debug/home/git/build/v3.19-rc6+/vmlinux/9c657619efb47cd8eb1a825865ba3a26cf709e98:
ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked,
BuildID[sha1]=9c657619efb47cd8eb1a825865ba3a26cf709e98, not stripped
It works if using addr2line directly:
[acme@zoo linux]$ addr2line -f -e
/home/acme/.debug/home/git/build/v3.19-rc6+/vmlinux/9c657619efb47cd8eb1a825865ba3a26cf709e98
ffffffff8109fe42
trace_sched_wakeup
/home/git/linux/include/trace/events/sched.h:83
[acme@zoo linux]$
- Arnaldo
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