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ftrace: add compile-time check on F_printk()

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Make sure F_printk() has corrent format and args, and make sure
changes in F_STRUCT() won't break F_printk().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4AADF6CC.1060809@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Li Zefan 2009-09-14 15:54:52 +08:00 committed by Steven Rostedt
parent c16de8fd7a
commit 05ffa2d020
1 changed files with 41 additions and 4 deletions
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45
kernel/trace/trace_export.c
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@ -22,6 +22,47 @@
#undef __field_struct #undef __field_struct
#define __field_struct(type, item) #define __field_struct(type, item)
#undef __field
#define __field(type, item) type item;
#undef __field_desc
#define __field_desc(type, container, item) type item;
#undef __array
#define __array(type, item, size) type item[size];
#undef __array_desc
#define __array_desc(type, container, item, size) type item[size];
#undef __dynamic_array
#define __dynamic_array(type, item) type item[];
#undef F_STRUCT
#define F_STRUCT(args...) args
#undef F_printk
#define F_printk(fmt, args...) fmt, args
#undef FTRACE_ENTRY
#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
struct ____ftrace_##name { \
tstruct \
}; \
static void __used ____ftrace_check_##name(void) \
{ \
struct ____ftrace_##name *__entry = NULL; \
\
/* force cmpile-time check on F_printk() */ \
printk(print); \
}
#undef FTRACE_ENTRY_DUP
#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
#include "trace_entries.h"
#undef __field #undef __field
#define __field(type, item) \ #define __field(type, item) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
@ -88,10 +129,6 @@ ftrace_format_##name(struct ftrace_event_call *unused, \
return ret; \ return ret; \
} }
#undef FTRACE_ENTRY_DUP
#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
#include "trace_entries.h" #include "trace_entries.h"