Em Wed, Oct 10, 2018 at 12:20:04AM +0200, Jiri Olsa escreveu:
> On Tue, Oct 09, 2018 at 04:47:31PM -0500, Anthony LaTorre wrote:
> > I can try building perf from the latest sources. I've attached the
> > perf.data and perf.data.tar.bz2 from the test program I sent earlier.
>
> cool, reproduced.. it seems to get introduced by:
> 2a9d5050dc84 perf script: Show correct offsets for DWARF-based unwinding
>
> reverting that patch fixes the issue for me, but looks like
> we could just make th attached check and prevent the crash
>
> adding Sandipan Das to the loop, the author of that commit, any idea?
commit ff4ce2885af8f9e8e99864d78dbeb4673f089c76
Author: Milian Wolff <milian.wo...@kdab.com>
Date: Wed Sep 26 15:52:05 2018 +0200
perf report: Don't try to map ip to invalid map
Fixes a crash when the report encounters an address that could not be
associated with an mmaped region:
#0 0x00005555557bdc4a in callchain_srcline (ip=<error reading variable:
Cannot access memory at address 0x38>, sym=0x0, map=0x0) at util/machine.c:2329
#1 unwind_entry (entry=entry@entry=0x7fffffff9180,
arg=arg@entry=0x7ffff5642498) at util/machine.c:2329
#2 0x00005555558370af in entry (arg=0x7ffff5642498, cb=0x5555557bdb50
<unwind_entry>, thread=<optimized out>, ip=18446744073709551615) at
util/unwind-libunwind-local.c:586
#3 get_entries (ui=ui@entry=0x7fffffff9620, cb=0x5555557bdb50
<unwind_entry>, arg=0x7ffff5642498, max_stack=<optimized out>) at
util/unwind-libunwind-local.c:703
#4 0x0000555555837192 in _unwind__get_entries (cb=<optimized out>,
arg=<optimized out>, thread=<optimized out>, data=<optimized out>,
max_stack=<optimized out>) at util/unwind-libunwind-
local.c:725
#5 0x00005555557c310f in thread__resolve_callchain_unwind
(max_stack=127, sample=0x7fffffff9830, evsel=0x555555c7b3b0,
cursor=0x7ffff5642498, thread=0x555555c7f6f0) at util/machine.c:235
1
#6 thread__resolve_callchain (thread=0x555555c7f6f0,
cursor=0x7ffff5642498, evsel=0x555555c7b3b0, sample=0x7fffffff9830,
parent=0x7fffffff97b8, root_al=0x7fffffff9750, max_stack=127) at
util/machine.c:2378
#7 0x00005555557ba4ee in sample__resolve_callchain (sample=<optimized
out>, cursor=<optimized out>, parent=parent@entry=0x7fffffff97b8,
evsel=<optimized out>, al=al@entry=0x7fffffff9750,
max_stack=<optimized out>) at util/callchain.c:1085
Signed-off-by: Milian Wolff <milian.wo...@kdab.com>
Tested-by: Sandipan Das <sandi...@linux.ibm.com>
Acked-by: Jiri Olsa <jo...@kernel.org>
Cc: Jin Yao <yao....@linux.intel.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Fixes: 2a9d5050dc84 ("perf script: Show correct offsets for DWARF-based
unwinding")
Link: http://lkml.kernel.org/r/20180926135207.30263-1-milian.wo...@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
