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authorSteven Rostedt <srostedt@redhat.com>2009-02-24 10:21:36 -0500
committerSteven Rostedt <srostedt@redhat.com>2009-02-24 21:54:05 -0500
commitb77e38aa240c3bd9c55c98b9f7c81541e042eae5 (patch)
treebbb40993e76edc52d2cae1040b941ba4e4d2f965 /include/asm-generic
parent7c37730cd31ddb2d3a1da142af9b18c29b8c433b (diff)
tracing: add event trace infrastructure
This patch creates the event tracing infrastructure of ftrace. It will create the files: /debug/tracing/available_events /debug/tracing/set_event The available_events will list the trace points that have been registered with the event tracer. set_events will allow the user to enable or disable an event hook. example: # echo sched_wakeup > /debug/tracing/set_event Will enable the sched_wakeup event (if it is registered). # echo "!sched_wakeup" >> /debug/tracing/set_event Will disable the sched_wakeup event (and only that event). # echo > /debug/tracing/set_event Will disable all events (notice the '>') # cat /debug/tracing/available_events > /debug/tracing/set_event Will enable all registered event hooks. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/vmlinux.lds.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index c61fab1dd2f..0add6b28c36 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -61,6 +61,14 @@
#define BRANCH_PROFILE()
#endif
+#ifdef CONFIG_EVENT_TRACER
+#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
+ *(_ftrace_events) \
+ VMLINUX_SYMBOL(__stop_ftrace_events) = .;
+#else
+#define FTRACE_EVENTS()
+#endif
+
/* .data section */
#define DATA_DATA \
*(.data) \
@@ -81,7 +89,8 @@
*(__tracepoints) \
VMLINUX_SYMBOL(__stop___tracepoints) = .; \
LIKELY_PROFILE() \
- BRANCH_PROFILE()
+ BRANCH_PROFILE() \
+ FTRACE_EVENTS()
#define RO_DATA(align) \
. = ALIGN((align)); \