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tracing: Let filter_assign_type() detect FILTER_PTR_STRING

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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 <mingo@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Cong Wang 2019-05-25 09:58:00 -07:00 committed by Steven Rostedt (VMware)
parent 46710f3a34
commit 5967bd5c42
1 changed files with 3 additions and 0 deletions
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3
kernel/trace/trace_events_filter.c
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@ -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;
}