perf tools: Mark split kallsyms DSOs as loaded

[ Upstream commit 7da4d60db33cccd8f4c445ab20bba71531435ee5 ]

The maps__split_kallsyms() will split symbols to module DSOs if it comes
from a module.  It also handled some unusual kernel symbols after modules
by creating new kernel maps like "[kernel].0".

But they are pseudo DSOs to have those unexpected symbols.  They should
not be considered as unloaded kernel DSOs.  Otherwise the dso__load()
for them will end up calling dso__load_kallsyms() and then
maps__split_kallsyms() again and again.

Reviewed-by: Ian Rogers <irogers@google.com>
Fixes: 2e538c4a1847291cf ("perf tools: Improve kernel/modules symbol lookup")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 948d3e8ad782bc2a8a545ec575b91b51dc83c70f..aed65b1abe669701d536fb0600e310fc23d8e4e6 100644 (file)
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -976,6 +976,7 @@ static int maps__split_kallsyms(struct maps *kmaps, struct dso *dso, u64 delta,
                                return -1;
 
                        dso__set_kernel(ndso, dso__kernel(dso));
+                       dso__set_loaded(ndso);
 
                        curr_map = map__new2(pos->start, ndso);
                        if (curr_map == NULL) {