xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tracing/probe: Add trace_event_call accesses APIs

Browse Source 
Add trace_event_call access APIs for trace_probe.
Instead of accessing trace_probe.call directly, use those
accesses by trace_probe_event_call() method. This hides
the relationship of trace_event_call and trace_probe from
trace_kprobe and trace_uprobe.

Link: http://lkml.kernel.org/r/155931587711.28323.8335129014686133120.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu
2019-06-01 00:17:57 +09:00
committed by Steven Rostedt (VMware)
parent b55ce203a8
commit e3dc9f898e
4 changed files with 40 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
kernel/trace/trace_kprobe.c
View File

@@ -985,7 +985,7 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
struct ring_buffer *buffer;
int size, dsize, pc;
unsigned long irq_flags;
struct trace_event_call *call = &tk->tp.call;
struct trace_event_call *call = trace_probe_event_call(&tk->tp);
WARN_ON(call != trace_file->event_call);
@@ -1033,7 +1033,7 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri,
struct ring_buffer *buffer;
int size, pc, dsize;
unsigned long irq_flags;
struct trace_event_call *call = &tk->tp.call;
struct trace_event_call *call = trace_probe_event_call(&tk->tp);
WARN_ON(call != trace_file->event_call);
@@ -1163,7 +1163,7 @@ static int kretprobe_event_define_fields(struct trace_event_call *event_call)
static int
kprobe_perf_func(struct trace_kprobe *tk, struct pt_regs *regs)
{
struct trace_event_call *call = &tk->tp.call;
struct trace_event_call *call = trace_probe_event_call(&tk->tp);
struct kprobe_trace_entry_head *entry;
struct hlist_head *head;
int size, __size, dsize;
@@ -1213,7 +1213,7 @@ static void
kretprobe_perf_func(struct trace_kprobe *tk, struct kretprobe_instance *ri,
struct pt_regs *regs)
{
struct trace_event_call *call = &tk->tp.call;
struct trace_event_call *call = trace_probe_event_call(&tk->tp);
struct kretprobe_trace_entry_head *entry;
struct hlist_head *head;
int size, __size, dsize;
@@ -1348,9 +1348,10 @@ static struct trace_event_functions kprobe_funcs = {
.trace = print_kprobe_event
};
static inline void init_trace_event_call(struct trace_kprobe *tk,
struct trace_event_call *call)
static inline void init_trace_event_call(struct trace_kprobe *tk)
{
struct trace_event_call *call = trace_probe_event_call(&tk->tp);
if (trace_kprobe_is_return(tk)) {
call->event.funcs = &kretprobe_funcs;
call->class->define_fields = kretprobe_event_define_fields;
@@ -1366,7 +1367,7 @@ static inline void init_trace_event_call(struct trace_kprobe *tk,
static int register_kprobe_event(struct trace_kprobe *tk)
{
init_trace_event_call(tk, &tk->tp.call);
init_trace_event_call(tk);
return trace_probe_register_event_call(&tk->tp);
}
@@ -1403,7 +1404,7 @@ create_local_trace_kprobe(char *func, void *addr, unsigned long offs,
return ERR_CAST(tk);
}
init_trace_event_call(tk, &tk->tp.call);
init_trace_event_call(tk);
if (traceprobe_set_print_fmt(&tk->tp, trace_kprobe_is_return(tk)) < 0) {
ret = -ENOMEM;
@@ -1414,7 +1415,7 @@ create_local_trace_kprobe(char *func, void *addr, unsigned long offs,
if (ret < 0)
goto error;
return &tk->tp.call;
return trace_probe_event_call(&tk->tp);
error:
free_trace_kprobe(tk);
return ERR_PTR(ret);
@@ -1447,7 +1448,7 @@ static __init void enable_boot_kprobe_events(void)
mutex_lock(&event_mutex);
for_each_trace_kprobe(tk, pos) {
list_for_each_entry(file, &tr->events, list)
if (file->event_call == &tk->tp.call)
if (file->event_call == trace_probe_event_call(&tk->tp))
trace_event_enable_disable(file, 1, 0);
}
mutex_unlock(&event_mutex);
@@ -1523,7 +1524,7 @@ find_trace_probe_file(struct trace_kprobe *tk, struct trace_array *tr)
struct trace_event_file *file;
list_for_each_entry(file, &tr->events, list)
if (file->event_call == &tk->tp.call)
if (file->event_call == trace_probe_event_call(&tk->tp))
return file;
return NULL;