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tracing: Ftrace dynamic ftrace_event_call support

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Add dynamic ftrace_event_call support to ftrace. Trace engines can add
new ftrace_event_call to ftrace on the fly. Each operator function of
the call takes an ftrace_event_call data structure as an argument,
because these functions may be shared among several ftrace_event_calls.

Changes from v13:
 - Define remove_subsystem_dir() always (revirt a2ca5e03), because
   trace_remove_event_call() uses it.
 - Modify syscall tracer because of ftrace_event_call change.

[fweisbec@gmail.com: Fixed conflict against latest tracing/core]

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Przemysław Pawełczyk <przemyslaw@pawelczyk.it>
Cc: Roland McGrath <roland@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
LKML-Reference: <20090813203453.31965.71901.stgit@localhost.localdomain>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Masami Hiramatsu
2009-08-13 16:34:53 -04:00
committed by Frederic Weisbecker
parent b1cf540f0e
commit bd1a5c849b
7 changed files with 130 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
include/trace/ftrace.h
View File

@@ -434,7 +434,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
* event_trace_printk(_RET_IP_, "<call>: " <fmt>);
* }
*
* static int ftrace_reg_event_<call>(void)
* static int ftrace_reg_event_<call>(struct ftrace_event_call *unused)
* {
* int ret;
*
@@ -445,7 +445,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
* return ret;
* }
*
* static void ftrace_unreg_event_<call>(void)
* static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
* {
* unregister_trace_<call>(ftrace_event_<call>);
* }
@@ -478,7 +478,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
* trace_current_buffer_unlock_commit(event, irq_flags, pc);
* }
*
* static int ftrace_raw_reg_event_<call>(void)
* static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused)
* {
* int ret;
*
@@ -489,7 +489,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
* return ret;
* }
*
* static void ftrace_unreg_event_<call>(void)
* static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
* {
* unregister_trace_<call>(ftrace_raw_event_<call>);
* }
@@ -498,7 +498,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
* .trace = ftrace_raw_output_<call>, <-- stage 2
* };
*
* static int ftrace_raw_init_event_<call>(void)
* static int ftrace_raw_init_event_<call>(struct ftrace_event_call *unused)
* {
* int id;
*
@@ -592,7 +592,7 @@ static void ftrace_raw_event_##call(proto) \
trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
} \
\
static int ftrace_raw_reg_event_##call(void *ptr) \
static int ftrace_raw_reg_event_##call(struct ftrace_event_call *unused)\
{ \
int ret; \
\
@@ -603,7 +603,7 @@ static int ftrace_raw_reg_event_##call(void *ptr) \
return ret; \
} \
\
static void ftrace_raw_unreg_event_##call(void *ptr) \
static void ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused)\
{ \
unregister_trace_##call(ftrace_raw_event_##call); \
} \
@@ -612,7 +612,7 @@ static struct trace_event ftrace_event_type_##call = { \
.trace = ftrace_raw_output_##call, \
}; \
\
static int ftrace_raw_init_event_##call(void) \
static int ftrace_raw_init_event_##call(struct ftrace_event_call *unused)\
{ \
int id; \
\