[PATCH 11/12] perf tools: Reuse shared eBPF dso objects

Jiri Olsa
2019-04-16T16:02:11Z

The eBPF program can be loaded multiple times
with the same name (tag). We can share dso
objects for those programs.

Link: http://lkml.kernel.org/n/tip-3damf8vq1dryhtpbk5b06jpt@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/machine.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index d4aa44489011..a60653827891 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -23,6 +23,7 @@
#include "linux/hash.h"
#include "asm/bug.h"
#include "bpf-event.h"
+#include "dso.h"

#include "sane_ctype.h"
#include <symbol/kallsyms.h>
@@ -699,11 +700,18 @@ static int machine__process_ksymbol_register(struct machine *machine,

map = map_groups__find(&machine->kmaps, event->ksymbol_event.addr);
if (!map) {
- map = dso__new_map(event->ksymbol_event.name);
- if (!map)
+ struct dso *dso;
+
+ dso = dsos__findnew(&machine->dsos, event->ksymbol_event.name);
+ if (!dso)
return -ENOMEM;

- map->start = event->ksymbol_event.addr;
+ map = map__new2(event->ksymbol_event.addr, dso);
+ if (!map) {
+ dso__put(dso);
+ return -ENOMEM;
+ }
+
map->end = map->start + event->ksymbol_event.len;
map_groups__insert(&machine->kmaps, map);
}
--
2.17.2