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perf symbols: Find symbols in different mount namespace

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Teach perf how to resolve symbols from binaries that are in a different
mount namespace from the tool.  This allows perf to generate meaningful
stack traces even if the binary resides in a different mount namespace
from the tool.

Signed-off-by: Krister Johansen <kjlx@templeofstupid.com>
Tested-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1499305693-1599-2-git-send-email-kjlx@templeofstupid.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Krister Johansen
2017-07-05 18:48:08 -07:00
committed by Arnaldo Carvalho de Melo
parent 86bcdb5a43
commit 843ff37bb5
8 changed files with 180 additions and 0 deletions
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2
tools/perf/util/map.c
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@@ -16,6 +16,7 @@
#include "machine.h"
#include <linux/string.h>
#include "srcline.h"
#include "namespaces.h"
#include "unwind.h"
static void __maps__insert(struct maps *maps, struct map *map);
@@ -200,6 +201,7 @@ struct map *map__new(struct machine *machine, u64 start, u64 len,
if (type != MAP__FUNCTION)
dso__set_loaded(dso, map->type);
}
dso->nsinfo = nsinfo__get(thread->nsinfo);
dso__put(dso);
}
return map;