New flag --perf_basic_prof_only_functions

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index e563e4c570b3819c68d77127a83a09099dfcff90..505e2b7143e6c48676182c53146c65e775152e66 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -943,6 +943,9 @@ DEFINE_BOOL(ll_prof, false, "Enable low-level linux profiler.")
 DEFINE_BOOL(perf_basic_prof, false,
             "Enable perf linux profiler (basic support).")
 DEFINE_NEG_IMPLICATION(perf_basic_prof, compact_code_space)
+DEFINE_BOOL(perf_basic_prof_only_functions, false,
+            "Only report function code ranges to perf (i.e. no stubs).")
+DEFINE_IMPLICATION(perf_basic_prof_only_functions, perf_basic_prof)
 DEFINE_STRING(gc_fake_mmap, "/tmp/__v8_gc__",
               "Specify the name of the file for fake gc mmap used in ll_prof")
 DEFINE_BOOL(log_internal_timer_events, false, "Time internal events.")