On Wed, Apr 17, 2019 at 09:35:32AM +0300, Adrian Hunter wrote: > On 16/04/19 7:01 PM, Jiri Olsa wrote: > > The eBPF program can be loaded multiple times > > with the same name (tag). We can share dso > > objects for those programs. > > Doesn't a eBPF program get recompiled differently every time it is loaded?
yes, but those with same tag are identical jirka > > > > > Link: http://lkml.kernel.org/n/tip-3damf8vq1dryhtpbk5b06...@git.kernel.org > > Signed-off-by: Jiri Olsa <jo...@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); > > } > > >
