From b55ce203a8f327b623688c8fb551ac3f9781edea Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Sat, 1 Jun 2019 00:17:47 +0900 Subject: tracing/probe: Add probe event name and group name accesses APIs 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 Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace_kprobe.c | 24 ++++++++++++------------ kernel/trace/trace_probe.h | 10 ++++++++++ kernel/trace/trace_uprobe.c | 22 +++++++++++----------- 3 files changed, 33 insertions(+), 23 deletions(-) (limited to 'kernel') diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index c3ab84cb25c8..3cf8cee4f276 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -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; diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index 87d48d850b63..67424cb5d5d6 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -266,6 +266,16 @@ static inline bool trace_probe_is_registered(struct trace_probe *tp) return trace_probe_test_flag(tp, TP_FLAG_REGISTERED); } +static inline const char *trace_probe_name(struct trace_probe *tp) +{ + return trace_event_name(&tp->call); +} + +static inline const char *trace_probe_group_name(struct trace_probe *tp) +{ + return tp->call.class->system; +} + static inline int trace_probe_unregister_event_call(struct trace_probe *tp) { /* tp->event is unregistered in trace_remove_event_call() */ diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index f8e23ed47823..09fdba3ee9d9 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -289,8 +289,8 @@ static bool trace_uprobe_match(const char *system, const char *event, { struct trace_uprobe *tu = to_trace_uprobe(ev); - return strcmp(trace_event_name(&tu->tp.call), event) == 0 && - (!system || strcmp(tu->tp.call.class->system, system) == 0); + return strcmp(trace_probe_name(&tu->tp), event) == 0 && + (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0); } /* @@ -340,8 +340,8 @@ static struct trace_uprobe *find_probe_event(const char *event, const char *grou struct trace_uprobe *tu; for_each_trace_uprobe(tu, pos) - if (strcmp(trace_event_name(&tu->tp.call), event) == 0 && - strcmp(tu->tp.call.class->system, group) == 0) + if (strcmp(trace_probe_name(&tu->tp), event) == 0 && + strcmp(trace_probe_group_name(&tu->tp), group) == 0) return tu; return NULL; @@ -376,8 +376,8 @@ static struct trace_uprobe *find_old_trace_uprobe(struct trace_uprobe *new) struct trace_uprobe *tmp, *old = NULL; struct inode *new_inode = d_real_inode(new->path.dentry); - old = find_probe_event(trace_event_name(&new->tp.call), - new->tp.call.class->system); + old = find_probe_event(trace_probe_name(&new->tp), + trace_probe_group_name(&new->tp)); for_each_trace_uprobe(tmp, pos) { if ((old ? old != tmp : true) && @@ -624,8 +624,8 @@ static int trace_uprobe_show(struct seq_file *m, struct dyn_event *ev) char c = is_ret_probe(tu) ? 'r' : 'p'; int i; - seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, tu->tp.call.class->system, - trace_event_name(&tu->tp.call), tu->filename, + seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, trace_probe_group_name(&tu->tp), + trace_probe_name(&tu->tp), tu->filename, (int)(sizeof(void *) * 2), tu->offset); if (tu->ref_ctr_offset) @@ -695,7 +695,7 @@ static int probes_profile_seq_show(struct seq_file *m, void *v) tu = to_trace_uprobe(ev); seq_printf(m, " %s %-44s %15lu\n", tu->filename, - trace_event_name(&tu->tp.call), tu->nhit); + trace_probe_name(&tu->tp), tu->nhit); return 0; } @@ -896,12 +896,12 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e if (is_ret_probe(tu)) { trace_seq_printf(s, "%s: (0x%lx <- 0x%lx)", - trace_event_name(&tu->tp.call), + trace_probe_name(&tu->tp), entry->vaddr[1], entry->vaddr[0]); data = DATAOF_TRACE_ENTRY(entry, true); } else { trace_seq_printf(s, "%s: (0x%lx)", - trace_event_name(&tu->tp.call), + trace_probe_name(&tu->tp), entry->vaddr[0]); data = DATAOF_TRACE_ENTRY(entry, false); } -- cgit v1.2.3