machine: Adopt is_lock_function() from builtin-lock.c

It is used in bpf_lock_contention.c and builtin-lock.c will be made
CONFIG_LIBTRACEEVENT=y conditional, so move it to machine.c, that is
always available.

This makes those 4 global variables for sched and lock text start and
end to move to 'struct machine' too, as conceivably we can have that
info for several machine instances, say some 'perf diff' like tool.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 76316e459c3d..803c9d1803dd 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -3336,3 +3336,43 @@ int machine__for_each_kernel_map(struct machine *machine, machine__map_t fn, voi
 	}
 	return err;
 }
+
+bool machine__is_lock_function(struct machine *machine, u64 addr)
+{
+	if (!machine->sched.text_start) {
+		struct map *kmap;
+		struct symbol *sym = machine__find_kernel_symbol_by_name(machine, "__sched_text_start", &kmap);
+
+		if (!sym) {
+			/* to avoid retry */
+			machine->sched.text_start = 1;
+			return false;
+		}
+
+		machine->sched.text_start = kmap->unmap_ip(kmap, sym->start);
+
+		/* should not fail from here */
+		sym = machine__find_kernel_symbol_by_name(machine, "__sched_text_end", &kmap);
+		machine->sched.text_end = kmap->unmap_ip(kmap, sym->start);
+
+		sym = machine__find_kernel_symbol_by_name(machine, "__lock_text_start", &kmap);
+		machine->lock.text_start = kmap->unmap_ip(kmap, sym->start);
+
+		sym = machine__find_kernel_symbol_by_name(machine, "__lock_text_end", &kmap);
+		machine->lock.text_end = kmap->unmap_ip(kmap, sym->start);
+	}
+
+	/* failed to get kernel symbols */
+	if (machine->sched.text_start == 1)
+		return false;
+
+	/* mutex and rwsem functions are in sched text section */
+	if (machine->sched.text_start <= addr && addr < machine->sched.text_end)
+		return true;
+
+	/* spinlock functions are in lock text section */
+	if (machine->lock.text_start <= addr && addr < machine->lock.text_end)
+		return true;
+
+	return false;
+}