linux-kernel - Re: [PATCH v2 2/8] perf tools: Introduce perf_hpp__setup_hists

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Message-ID: <20160304215822.GZ3604@kernel.org>
Date:	Fri, 4 Mar 2016 18:58:22 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH v2 2/8] perf tools: Introduce
 perf_hpp__setup_hists_formats()

Em Fri, Mar 04, 2016 at 11:59:36PM +0900, Namhyung Kim escreveu:
> The perf_hpp__setup_hists_formats() is to build hists-specific output
> formats (and sort keys).  Currently it's only used in order to build the
> output format in a hierarchy with same sort keys, but it could be used
> with different sort keys in non-hierarchy mode later.

After applying this one:

[root@...et ~]# perf top --hierarchy  # press 'q' to exit and get this:
perf: Segmentation fault
-------- backtrace --------
perf[0x54b60b]
/lib64/libc.so.6(+0x34b20)[0x7fb7e06e9b20]
perf[0x4e9780]
perf(perf_evsel__delete+0x20)[0x498450]
perf(perf_evlist__delete+0x182)[0x48fbe2]
perf(cmd_top+0xc93)[0x440893]
perf[0x481c01]
perf(main+0x67a)[0x423dea]
/lib64/libc.so.6(__libc_start_main+0xf0)[0x7fb7e06d5580]
perf(_start+0x29)[0x423f09]
[0x0]
[root@...et ~]#

rebuild it with DEBUG=1, run it on gdb, press 'q' to exit 'perf top':

(gdb) run top --stdio --hierarchy
Program received signal SIGSEGV, Segmentation fault.
0x000000000051632b in hists_evsel__exit (evsel=0x19b95b0) at util/hist.c:2143
2143			perf_hpp_list__for_each_format_safe(&node->hpp, fmt, pos) {
Missing separate debuginfos, use: dnf debuginfo-install bzip2-libs-1.0.6-19.fc23.x86_64 glibc-2.22-10.fc23.x86_64 libunwind-1.1-10.fc23.x86_64 nss-softokn-freebl-3.22.0-1.0.fc23.x86_64 numactl-libs-2.0.10-3.fc23.x86_64 perl-libs-5.22.1-350.fc23.x86_64 python-libs-2.7.10-8.fc23.x86_64 slang-2.3.0-4.fc23.x86_64
(gdb) bt
#0  0x000000000051632b in hists_evsel__exit (evsel=0x19b95b0) at util/hist.c:2143
#1  0x00000000004b5a2c in perf_evsel__exit (evsel=0x19b95b0) at util/evsel.c:1094
#2  0x00000000004b5a6a in perf_evsel__delete (evsel=0x19b95b0) at util/evsel.c:1099
#3  0x00000000004adf5d in perf_evlist__purge (evlist=0x19b8b90) at util/evlist.c:115
#4  0x00000000004ae090 in perf_evlist__delete (evlist=0x19b8b90) at util/evlist.c:135
#5  0x0000000000446547 in cmd_top (argc=0, argv=0x7fffffffe310, prefix=0x0) at builtin-top.c:1346
#6  0x000000000049e614 in run_builtin (p=0x90f5e0 <commands+288>, argc=3, argv=0x7fffffffe310) at perf.c:390
#7  0x000000000049e87c in handle_internal_command (argc=3, argv=0x7fffffffe310) at perf.c:451
#8  0x000000000049e9c1 in run_argv (argcp=0x7fffffffe16c, argv=0x7fffffffe160) at perf.c:497
#9  0x000000000049ed67 in main (argc=3, argv=0x7fffffffe310) at perf.c:624
(gdb)