BackPup/Linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-25 21:21:09 -04:00
Code Issues Packages Projects Releases Wiki Activity

perf record: Store data mmaps for dwarf unwind

Browse Source 
Currently we don't synthesize data mmap by default. It depends on -d
option, that enables data address sampling.

But we've seen cases (softice) where DWARF unwinder went through non
executable mmaps, which we need to lookup in MAP__VARIABLE tree.

Making data mmaps to be synthesized for dwarf unwind as well.

Reported-by: Noel Grandin <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Jiri Olsa
2016-01-08 14:17:45 -03:00
committed by Arnaldo Carvalho de Melo
parent 0ba98149f8
commit 5c0cf22477
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/builtin-record.c
+5 -1
View File
@@ -815,8 +815,12 @@ int record_parse_callchain_opt(const struct option *opt,
}
ret = parse_callchain_record_opt(arg, &callchain_param);
if (!ret)
if (!ret) {
/* Enable data address sampling for DWARF unwind. */
if (callchain_param.record_mode == CALLCHAIN_DWARF)
record->sample_address = true;
callchain_debug();
}
return ret;
}