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tracing: Pass the trace_array into ftrace_probe_ops functions

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Pass the trace_array associated to a ftrace_probe_ops into the probe_ops
func(), init() and free() functions. The trace_array is the descriptor that
describes a tracing instance. This will help create the infrastructure that
will allow having function probes unique to tracing instances.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2017-04-10 22:30:05 -04:00
parent 04ec7bb642
commit b5f081b563
5 changed files with 51 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

35
kernel/trace/trace_functions.c
View file

@ -328,21 +328,24 @@ static void update_traceon_count(struct ftrace_probe_ops *ops,
static void
ftrace_traceon_count(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
update_traceon_count(ops, ip, 1);
}
static void
ftrace_traceoff_count(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
update_traceon_count(ops, ip, 0);
}
static void
ftrace_traceon(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
if (tracing_is_on())
return;
@ -352,7 +355,8 @@ ftrace_traceon(unsigned long ip, unsigned long parent_ip,
static void
ftrace_traceoff(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
if (!tracing_is_on())
return;
@ -371,14 +375,16 @@ ftrace_traceoff(unsigned long ip, unsigned long parent_ip,
static void
ftrace_stacktrace(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
trace_dump_stack(STACK_SKIP);
}
static void
ftrace_stacktrace_count(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
struct ftrace_func_mapper *mapper = ops->private_data;
long *count;
@ -436,7 +442,8 @@ static int update_count(struct ftrace_probe_ops *ops, unsigned long ip)
static void
ftrace_dump_probe(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
if (update_count(ops, ip))
ftrace_dump(DUMP_ALL);
@ -445,7 +452,8 @@ ftrace_dump_probe(unsigned long ip, unsigned long parent_ip,
/* Only dump the current CPU buffer. */
static void
ftrace_cpudump_probe(unsigned long ip, unsigned long parent_ip,
struct ftrace_probe_ops *ops, void **data)
struct trace_array *tr, struct ftrace_probe_ops *ops,
void **data)
{
if (update_count(ops, ip))
ftrace_dump(DUMP_ORIG);
@ -473,7 +481,8 @@ ftrace_probe_print(const char *name, struct seq_file *m,
static int
ftrace_traceon_print(struct seq_file *m, unsigned long ip,
struct ftrace_probe_ops *ops, void *data)
struct ftrace_probe_ops *ops,
void *data)
{
return ftrace_probe_print("traceon", m, ip, ops);
}
@ -508,8 +517,8 @@ ftrace_cpudump_print(struct seq_file *m, unsigned long ip,
static int
ftrace_count_init(struct ftrace_probe_ops *ops, unsigned long ip,
void *data)
ftrace_count_init(struct ftrace_probe_ops *ops, struct trace_array *tr,
unsigned long ip, void *data)
{
struct ftrace_func_mapper *mapper = ops->private_data;
@ -517,8 +526,8 @@ ftrace_count_init(struct ftrace_probe_ops *ops, unsigned long ip,
}
static void
ftrace_count_free(struct ftrace_probe_ops *ops, unsigned long ip,
void **_data)
ftrace_count_free(struct ftrace_probe_ops *ops, struct trace_array *tr,
unsigned long ip, void **_data)
{
struct ftrace_func_mapper *mapper = ops->private_data;