tracing: Let filter_assign_type() detect FILTER_PTR_STRING

filter_assign_type() could detect dynamic string and static string, but not string pointers. Teach filter_assign_type() to detect string pointers, and this will be needed by trace event injection code. BTW, trace event hist uses FILTER_PTR_STRING too. Link: http://lkml.kernel.org/r/[email protected] Cc: Ingo Molnar <[email protected]> Signed-off-by: Cong Wang <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
ks0n · Jul 16, 2019 · 5967bd5 · 5967bd5
1 parent 46710f3
commit 5967bd5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
@@ -1080,6 +1080,9 @@ int filter_assign_type(const char *type)
 	if (strchr(type, '[') && strstr(type, "char"))
 		return FILTER_STATIC_STRING;
 
+	if (strcmp(type, "char *") == 0 || strcmp(type, "const char *") == 0)
+		return FILTER_PTR_STRING;
+
 	return FILTER_OTHER;
 }