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authorKrister Johansen <kjlx@templeofstupid.com>2017-07-06 04:48:11 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-07-19 05:14:11 +0300
commitf045b8c4b36baddcfbdd4d3d956446e688b0b3cd (patch)
tree254b370374c31a5750b9aaa2fcc0b5f87208093e /tools/perf/util/dso.c
parent544abd44c7064c8a58a6bd2073d757f6b91d98c5 (diff)
downloadlinux-f045b8c4b36baddcfbdd4d3d956446e688b0b3cd.tar.xz
perf buildid-cache: Support binary objects from other namespaces
Teach buildid-cache how to add, remove, and update binary objects from other mount namespaces. Allow probe events tracing binaries in different namespaces to add their objects to the probe and build-id caches too. As a handy side effect, this also lets us access SDT probes in binaries from alternate mount namespaces. 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/1499305693-1599-5-git-send-email-kjlx@templeofstupid.com [ Add util/namespaces.c to tools/perf/util/python-ext-sources, to fix the python binding 'perf test' ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/dso.c')
-rw-r--r--tools/perf/util/dso.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index beda40ed63b0..dc9b49533a8f 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -504,7 +504,14 @@ static void check_data_close(void);
*/
static int open_dso(struct dso *dso, struct machine *machine)
{
- int fd = __open_dso(dso, machine);
+ int fd;
+ struct nscookie nsc;
+
+ if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
+ nsinfo__mountns_enter(dso->nsinfo, &nsc);
+ fd = __open_dso(dso, machine);
+ if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
+ nsinfo__mountns_exit(&nsc);
if (fd >= 0) {
dso__list_add(dso);
@@ -1302,6 +1309,7 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
{
bool have_build_id = false;
struct dso *pos;
+ struct nscookie nsc;
list_for_each_entry(pos, head, node) {
if (with_hits && !pos->hit && !dso__is_vdso(pos))
@@ -1310,11 +1318,13 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
have_build_id = true;
continue;
}
+ nsinfo__mountns_enter(pos->nsinfo, &nsc);
if (filename__read_build_id(pos->long_name, pos->build_id,
sizeof(pos->build_id)) > 0) {
have_build_id = true;
pos->has_build_id = true;
}
+ nsinfo__mountns_exit(&nsc);
}
return have_build_id;