From 5967bd5c4239be449744a1471daf60c866486c24 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Sat, 25 May 2019 09:58:00 -0700 Subject: [PATCH] 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/20190525165802.25944-3-xiyou.wangcong@gmail.com Cc: Ingo Molnar Signed-off-by: Cong Wang Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace_events_filter.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index d3e59312ef40..550e8a0d048a 100644 --- 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; }