diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-03-30 19:48:09 +0100 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2013-04-13 15:32:03 +0200 |
| commit | 3ede82dd3e3deb23429f2bf44fb600f440eef84b (patch) | |
| tree | ecf9313c1a1275b3b70ead7772f66a853e9f386f | |
| parent | 4d1298e2124767b4e263498485618b2e91aee5f0 (diff) | |
uprobes/tracing: Make seq_printf() code uretprobe-friendly
Change probes_seq_show() and print_uprobe_event() to check
is_ret_probe() and print the correct data.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Tested-by: Anton Arapov <anton@redhat.com>
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 457576215b3a..8c9f4894bcc0 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -435,9 +435,10 @@ static void probes_seq_stop(struct seq_file *m, void *v) static int probes_seq_show(struct seq_file *m, void *v) { struct trace_uprobe *tu = v; + char c = is_ret_probe(tu) ? 'r' : 'p'; int i; - seq_printf(m, "p:%s/%s", tu->call.class->system, tu->call.name); + seq_printf(m, "%c:%s/%s", c, tu->call.class->system, tu->call.name); seq_printf(m, " %s:0x%p", tu->filename, (void *)tu->offset); for (i = 0; i < tu->nr_args; i++) @@ -566,10 +567,18 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e entry = (struct uprobe_trace_entry_head *)iter->ent; tu = container_of(event, struct trace_uprobe, call.event); - if (!trace_seq_printf(s, "%s: (0x%lx)", tu->call.name, entry->vaddr[0])) - goto partial; + if (is_ret_probe(tu)) { + if (!trace_seq_printf(s, "%s: (0x%lx <- 0x%lx)", tu->call.name, + entry->vaddr[1], entry->vaddr[0])) + goto partial; + data = DATAOF_TRACE_ENTRY(entry, true); + } else { + if (!trace_seq_printf(s, "%s: (0x%lx)", tu->call.name, + entry->vaddr[0])) + goto partial; + data = DATAOF_TRACE_ENTRY(entry, false); + } - data = DATAOF_TRACE_ENTRY(entry, false); for (i = 0; i < tu->nr_args; i++) { if (!tu->args[i].type->print(s, tu->args[i].name, data + tu->args[i].offset, entry)) |