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authorSteven Rostedt <srostedt@redhat.com>2008-12-24 07:24:13 +0300
committerIngo Molnar <mingo@elte.hu>2008-12-29 14:46:12 +0300
commitf633cef0200bbaec539e2dbb0bc4bed7f022f98b (patch)
tree725d0b181b8e417303e27fa9e62d06b780fe4934 /kernel/trace/trace_output.h
parentf0868d1e23a8efec33beb3aa688aab7fdb1ae093 (diff)
downloadlinux-f633cef0200bbaec539e2dbb0bc4bed7f022f98b.tar.xz
ftrace: change trace.c to use registered events
Impact: rework trace.c to use new event register API Almost every ftrace event has to implement its output display in trace.c through a different function. Some events did not handle all the formats (trace, latency-trace, raw, hex, binary), and this method does not scale well. This patch converts the format functions to use the event API to find the event and and print its format. Currently, we have a print function for trace, latency_trace, raw, hex and binary. A trace_nop_print is available if the event wants to avoid output on a particular format. Perhaps other tracers could use this in the future (like mmiotrace and function_graph). Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_output.h')
-rw-r--r--kernel/trace/trace_output.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index 1fcc76e1378e..ecab4ea4a4fd 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -36,8 +36,24 @@ struct trace_event *ftrace_find_event(int type);
int register_ftrace_event(struct trace_event *event);
int unregister_ftrace_event(struct trace_event *event);
+int
+trace_nop_print(struct trace_seq *s, struct trace_entry *entry, int flags);
+
#define MAX_MEMHEX_BYTES 8
#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
+#define SEQ_PUT_FIELD_RET(s, x) \
+do { \
+ if (!trace_seq_putmem(s, &(x), sizeof(x))) \
+ return 0; \
+} while (0)
+
+#define SEQ_PUT_HEX_FIELD_RET(s, x) \
+do { \
+ BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \
+ if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \
+ return 0; \
+} while (0)
+
#endif