Commit bc055c54 authored Dec 18, 2018 by Arnaldo Carvalho de Melo

perf symbols: Relax checks on perf-PID.map ownership



Those are simple enough, and usually not produced by root, instead by
whatever user is running java, rust, Node.js JIT code that end up
generating those /tmp/perf-PID.map for resolution of symbols in the
anonymous executable maps.

Having to use --force to resolve symbols in 'perf top' is a distraction,
as recently I experienced when node.js symbols were not being resolved
by 'perf top'.

Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Hítalo Silva <hitalos@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/n/tip-tk2jgo2v4v2yjuj28axbpppo@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 42337cb7

tools/perf/util/symbol.c

+0 −11

Original line number	Diff line number	Diff line
		@@ -1537,17 +1537,6 @@ int dso__load(struct dso dso, struct map map)
		dso->adjust_symbols = 0;

		if (perfmap) {
		struct stat st;

		if (lstat(map_path, &st) < 0)
		goto out;

		if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) {
		pr_warning("File %s not owned by current user or root, "
		"ignoring it (use -f to override).\n", map_path);
		goto out;
		}

		ret = dso__load_perf_map(map_path, dso);
		dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT :
		DSO_BINARY_TYPE__NOT_FOUND;