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tracing/probe: Add probe event name and group name accesses APIs

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Add trace_probe_name() and trace_probe_group_name() functions
for accessing probe name and group name of trace_probe.

Link: http://lkml.kernel.org/r/155931586717.28323.8738615064952254761.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 00:17:47 +09:00
committed by Steven Rostedt (VMware)
parent 747774d6b0
commit b55ce203a8
3 changed files with 33 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
kernel/trace/trace_kprobe.c
View File

@@ -142,8 +142,8 @@ static bool trace_kprobe_match(const char *system, const char *event,
{
struct trace_kprobe *tk = to_trace_kprobe(ev);
return strcmp(trace_event_name(&tk->tp.call), event) == 0 &&
(!system || strcmp(tk->tp.call.class->system, system) == 0);
return strcmp(trace_probe_name(&tk->tp), event) == 0 &&
(!system || strcmp(trace_probe_group_name(&tk->tp), system) == 0);
}
static nokprobe_inline unsigned long trace_kprobe_nhit(struct trace_kprobe *tk)
@@ -263,8 +263,8 @@ static struct trace_kprobe *find_trace_kprobe(const char *event,
struct trace_kprobe *tk;
for_each_trace_kprobe(tk, pos)
if (strcmp(trace_event_name(&tk->tp.call), event) == 0 &&
strcmp(tk->tp.call.class->system, group) == 0)
if (strcmp(trace_probe_name(&tk->tp), event) == 0 &&
strcmp(trace_probe_group_name(&tk->tp), group) == 0)
return tk;
return NULL;
}
@@ -453,8 +453,8 @@ static int register_trace_kprobe(struct trace_kprobe *tk)
mutex_lock(&event_mutex);
/* Delete old (same name) event if exist */
old_tk = find_trace_kprobe(trace_event_name(&tk->tp.call),
tk->tp.call.class->system);
old_tk = find_trace_kprobe(trace_probe_name(&tk->tp),
trace_probe_group_name(&tk->tp));
if (old_tk) {
ret = unregister_trace_kprobe(old_tk);
if (ret < 0)
@@ -507,7 +507,7 @@ static int trace_kprobe_module_callback(struct notifier_block *nb,
ret = __register_trace_kprobe(tk);
if (ret)
pr_warn("Failed to re-register probe %s on %s: %d\n",
trace_event_name(&tk->tp.call),
trace_probe_name(&tk->tp),
mod->name, ret);
}
}
@@ -737,8 +737,8 @@ static int trace_kprobe_show(struct seq_file *m, struct dyn_event *ev)
int i;
seq_putc(m, trace_kprobe_is_return(tk) ? 'r' : 'p');
seq_printf(m, ":%s/%s", tk->tp.call.class->system,
trace_event_name(&tk->tp.call));
seq_printf(m, ":%s/%s", trace_probe_group_name(&tk->tp),
trace_probe_name(&tk->tp));
if (!tk->symbol)
seq_printf(m, " 0x%p", tk->rp.kp.addr);
@@ -812,7 +812,7 @@ static int probes_profile_seq_show(struct seq_file *m, void *v)
tk = to_trace_kprobe(ev);
seq_printf(m, " %-44s %15lu %15lu\n",
trace_event_name(&tk->tp.call),
trace_probe_name(&tk->tp),
trace_kprobe_nhit(tk),
tk->rp.kp.nmissed);
@@ -1084,7 +1084,7 @@ print_kprobe_event(struct trace_iterator *iter, int flags,
field = (struct kprobe_trace_entry_head *)iter->ent;
tp = container_of(event, struct trace_probe, call.event);
trace_seq_printf(s, "%s: (", trace_event_name(&tp->call));
trace_seq_printf(s, "%s: (", trace_probe_name(tp));
if (!seq_print_ip_sym(s, field->ip, flags | TRACE_ITER_SYM_OFFSET))
goto out;
@@ -1111,7 +1111,7 @@ print_kretprobe_event(struct trace_iterator *iter, int flags,
field = (struct kretprobe_trace_entry_head *)iter->ent;
tp = container_of(event, struct trace_probe, call.event);
trace_seq_printf(s, "%s: (", trace_event_name(&tp->call));
trace_seq_printf(s, "%s: (", trace_probe_name(tp));
if (!seq_print_ip_sym(s, field->ret_ip, flags | TRACE_ITER_SYM_OFFSET))
goto out;