Package: linux-tools-2.6.36
Version: 2.6.36-1~experimental.1
Tags: upstream
Can't seem to get "perf timechart" working.
$ uname -r
2.6.36-trunk-686
# perf timechart record echo hi
hi
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.079 MB perf.data (~3471 samples) ]
# chmod a+r perf.data
$ gdb --args perf_2.6.36 timechart
[...]
(gdb) run
Starting program: /usr/bin/perf_2.6.36 timechart
[Thread debugging using libthread_db enabled]
Program received signal SIGSEGV, Segmentation fault.
0x08061969 in ?? ()
(gdb) bt
#0 0x08061969 in ?? ()
#1 0x0808998e in ?? ()
#2 0x080888a6 in ?? ()
#3 0x080894b8 in __perf_session__process_events ()
#4 0x08089890 in perf_session__process_events ()
#5 0x08060041 in cmd_timechart ()
#6 0x0805210e in ?? ()
#7 0x080527cd in main ()
Also was reproducible with upstream linux and perf 2.6.37-rc3.
Valgrind trace (source line numbers refer to v2.6.37-rc3):
Invalid read of size 4
at 0x805B5C1: process_sample_event (builtin-timechart.c:505)
by 0x808654D: process_finished_round (session.c:410)
by 0x8085CF5: perf_session__process_event (session.c:633)
by 0x808732F: __perf_session__process_events (session.c:827)
by 0x80875CF: perf_session__process_events (session.c:867)
by 0x805BDE0: cmd_timechart (builtin-timechart.c:949)
by 0x804CCED: run_builtin (perf.c:286)
by 0x804D47E: main (perf.c:357)
Address 0x5416558 is 8 bytes after a block of size 72 alloc'd
at 0x4023F50: malloc (vg_replace_malloc.c:236)
by 0x8085EFA: perf_session__process_event (session.c:553)
by 0x808732F: __perf_session__process_events (session.c:827)
by 0x80875CF: perf_session__process_events (session.c:867)
by 0x805BDE0: cmd_timechart (builtin-timechart.c:949)
by 0x804CCED: run_builtin (perf.c:286)
by 0x804D47E: main (perf.c:357)
Is this a known problem? Where should it be reported?
(Ooh, this time it wrote a timechart before segfaulting! Apparently
v2.6.37-rc3 userspace + debian 2.6.36 kernel is the recipe for
success...)
Ciao,
Jonathan
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