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Date: Tue, 10 Dec 2013 14:22:58 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC: Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
Andi Kleen <ak@...ux.intel.com>,
Ben Cheng <bccheng@...gle.com>,
David Ahern <dsahern@...il.com>,
Dongsheng Yang <yangds.fnst@...fujitsu.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
Namhyung Kim <namhyung.kim@....com>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Stephane Eranian <eranian@...gle.com>,
Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [GIT PULL 00/21] perf/core improvements and fixes
On 10/12/13 14:10, Arnaldo Carvalho de Melo wrote:
> Em Tue, Dec 10, 2013 at 02:13:12PM +0200, Adrian Hunter escreveu:
>> On 10/12/13 13:44, Arnaldo Carvalho de Melo wrote:
>>> Em Tue, Dec 10, 2013 at 12:12:29PM +0100, Ingo Molnar escreveu:
>>>>
>>>> Hm, I've unpulled it because 'perf top' crashes on exit, in
>>>> dso__delete():
>>>
>>> 495 if (dso->sname_alloc)
>>> 496 free((char *)dso->short_name)
>>>
>>> Yeah, must be that basename() patch from Stephane, I'll work on a fix
>>> and resubmit this batch, thanks for the report.
>>
>> The problem is sname_alloc is not maintained. Perhaps it should be
>> set in dso__set_short_name() e.g.
>
> Yeah, sounds better than having all callers manage that thing, quickie,
> was this with Stephane's patch applied?
Yes it was at
e993d10caeb6dca690dbaf86e1981ba240d1414a
perf symbols: fix bug in usage of the basename() function
>
> I think it should be done as a prep, then apply a modified version of
> Stephanes, that doesn't deal with the alloc flag (more than using 'true'
> to say it is a malloc'ed chunk).
>
> - Arnaldo
>
>> diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
>> index 9fae484..54ed980 100644
>> --- a/tools/perf/util/dso.c
>> +++ b/tools/perf/util/dso.c
>> @@ -379,7 +379,7 @@ struct dso *dso__kernel_findnew(struct machine *machine,
>> const char *name,
>> * processing we had no idea this was the kernel dso.
>> */
>> if (dso != NULL) {
>> - dso__set_short_name(dso, short_name);
>> + dso__set_short_name(dso, short_name, false);
>> dso->kernel = dso_type;
>> }
>>
>> @@ -394,10 +394,13 @@ void dso__set_long_name(struct dso *dso, char *name)
>> dso->long_name_len = strlen(name);
>> }
>>
>> -void dso__set_short_name(struct dso *dso, const char *name)
>> +void dso__set_short_name(struct dso *dso, const char *name, bool sname_alloc)
>> {
>> if (name == NULL)
>> return;
>> + if (dso->sname_alloc)
>> + free((char *)dso->short_name);
>> + dso->sname_alloc = sname_alloc;
>> dso->short_name = name;
>> dso->short_name_len = strlen(name);
>> }
>> @@ -426,12 +429,7 @@ static void dso__set_basename(struct dso *dso)
>> if (!base)
>> return;
>>
>> - if (dso->sname_alloc)
>> - free((char *)dso->short_name);
>> - else
>> - dso->sname_alloc = 1;
>> -
>> - dso__set_short_name(dso, base);
>> + dso__set_short_name(dso, base, true);
>> }
>>
>> int dso__name_len(const struct dso *dso)
>> @@ -467,7 +465,7 @@ struct dso *dso__new(const char *name)
>> int i;
>> strcpy(dso->name, name);
>> dso__set_long_name(dso, dso->name);
>> - dso__set_short_name(dso, dso->name);
>> + dso__set_short_name(dso, dso->name, false);
>> for (i = 0; i < MAP__NR_TYPES; ++i)
>> dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
>> dso->cache = RB_ROOT;
>> diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
>> index 384f2d9..166463e 100644
>> --- a/tools/perf/util/dso.h
>> +++ b/tools/perf/util/dso.h
>> @@ -110,7 +110,7 @@ static inline void dso__set_loaded(struct dso *dso, enum
>> map_type type)
>> struct dso *dso__new(const char *name);
>> void dso__delete(struct dso *dso);
>>
>> -void dso__set_short_name(struct dso *dso, const char *name);
>> +void dso__set_short_name(struct dso *dso, const char *name, bool sname_alloc);
>> void dso__set_long_name(struct dso *dso, char *name);
>>
>> int dso__name_len(const struct dso *dso);
>>
>>
>>>
>>> - Arnaldo
>>>
>>>> [Thread 0x7ffff70df700 (LWP 29561) exited]
>>>> *** Error in `/fast/mingo/tip/tools/perf/perf': munmap_chunk(): invalid pointer: 0x0000000000587371 ***
>>>> ======= Backtrace: =========
>>>> /lib64/libc.so.6[0x3e5907bbe7]
>>>> /fast/mingo/tip/tools/perf/perf(dso__delete+0xd9)[0x46da89]
>>>> /fast/mingo/tip/tools/perf/perf(machines__exit+0xad)[0x482e7d]
>>>> /fast/mingo/tip/tools/perf/perf(perf_session__delete+0xb6)[0x488c66]
>>>> /fast/mingo/tip/tools/perf/perf(cmd_top+0xf44)[0x4345f4]
>>>> /fast/mingo/tip/tools/perf/perf[0x419f95]
>>>> /fast/mingo/tip/tools/perf/perf(main+0x600)[0x419830]
>>>> /lib64/libc.so.6(__libc_start_main+0xf5)[0x3e59021b45]
>>>> /fast/mingo/tip/tools/perf/perf[0x4198fd]
>>>> ======= Memory map: ========
>>>>
>>>> Program received signal SIGABRT, Aborted.
>>>> 0x0000003e590359e9 in raise () from /lib64/libc.so.6
>>>> Missing separate debuginfos, use: debuginfo-install audit-libs-2.3.2-1.fc19.x86_64 bzip2-libs-1.0.6-8.fc19.x86_64 elfutils-libelf-0.156-5.fc19.x86_64 elfutils-libs-0.156-5.fc19.x86_64 glibc-2.17-19.fc19.x86_64 libgcc-4.8.2-1.fc19.x86_64 libunwind-1.1-2.fc19.x86_64 nss-softokn-freebl-3.15.2-2.fc19.x86_64 numactl-libs-2.0.8-4.fc19.x86_64 perl-libs-5.16.3-266.fc19.x86_64 python-libs-2.7.5-9.fc19.x86_64 slang-2.2.4-8.fc19.x86_64 xz-libs-5.1.2-4alpha.fc19.x86_64 zlib-1.2.7-10.fc19.x86_64
>>>> (gdb)
>>>> (gdb) bt
>>>> #0 0x0000003e590359e9 in raise () from /lib64/libc.so.6
>>>> #1 0x0000003e590370f8 in abort () from /lib64/libc.so.6
>>>> #2 0x0000003e59075d17 in __libc_message () from /lib64/libc.so.6
>>>> #3 0x0000003e5907bbe7 in malloc_printerr () from /lib64/libc.so.6
>>>> #4 0x000000000046da89 in dso__delete (dso=0x8e46f0) at util/dso.c:496
>>>> #5 0x0000000000482e7d in dsos__delete (dsos=0x8e4490) at util/machine.c:72
>>>> #6 machine__exit (machine=<optimized out>) at util/machine.c:103
>>>> #7 machines__exit (machines=machines@...ry=0x8e4438) at util/machine.c:123
>>>> #8 0x0000000000488c66 in perf_session__delete (session=0x8e4360) at util/session.c:155
>>>> #9 0x00000000004345f4 in __cmd_top (top=0x7fffffffb140) at builtin-top.c:985
>>>> #10 cmd_top (argc=<optimized out>, argv=<optimized out>, prefix=<optimized out>) at builtin-top.c:1210
>>>> #11 0x0000000000419f95 in run_builtin (p=p@...ry=0x7ece88 <commands+264>, argc=argc@...ry=2, argv=argv@...ry=0x7fffffffe420) at perf.c:319
>>>> #12 0x0000000000419830 in handle_internal_command (argv=0x7fffffffe420, argc=2) at perf.c:376
>>>> #13 run_argv (argv=0x7fffffffe220, argcp=0x7fffffffe22c) at perf.c:420
>>>> #14 main (argc=2, argv=0x7fffffffe420) at perf.c:529
>>>> (gdb)
>>>>
>>>> Running it on an up-to-date installation of Fedora 19.
>>>>
>>>> Thanks,
>>>>
>>>> Ingo
>>>
>>>
>
>
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