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| author | Oleg Nesterov <oleg@redhat.com> | 2013-04-10 16:25:49 +0200 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2013-04-13 15:32:04 +0200 |
| commit | 32520b2c695b23221751eb09360a6a3dd3105b52 (patch) | |
| tree | 2ae042675882778a52f7b6a22afc974a1d942365 /kernel/trace | |
| parent | 4ee5a52ed6301d0afa56cc995ef2c3795f45e801 (diff) | |
| download | op-kernel-dev-32520b2c695b23221751eb09360a6a3dd3105b52.zip op-kernel-dev-32520b2c695b23221751eb09360a6a3dd3105b52.tar.gz | |
uprobes/tracing: Don't pass addr=ip to perf_trace_buf_submit()
uprobe_perf_print() passes addr=ip to perf_trace_buf_submit() for
no reason. This sets perf_sample_data->addr for PERF_SAMPLE_ADDR,
we already have perf_sample_data->ip initialized if PERF_SAMPLE_IP.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 2d08bea..37ccb72 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -811,7 +811,6 @@ static void uprobe_perf_print(struct trace_uprobe *tu, struct ftrace_event_call *call = &tu->call; struct uprobe_trace_entry_head *entry; struct hlist_head *head; - unsigned long ip; void *data; int size, rctx, i; @@ -825,13 +824,12 @@ static void uprobe_perf_print(struct trace_uprobe *tu, if (!entry) goto out; - ip = instruction_pointer(regs); if (is_ret_probe(tu)) { entry->vaddr[0] = func; - entry->vaddr[1] = ip; + entry->vaddr[1] = instruction_pointer(regs); data = DATAOF_TRACE_ENTRY(entry, true); } else { - entry->vaddr[0] = ip; + entry->vaddr[0] = instruction_pointer(regs); data = DATAOF_TRACE_ENTRY(entry, false); } @@ -839,7 +837,7 @@ static void uprobe_perf_print(struct trace_uprobe *tu, call_fetch(&tu->args[i].fetch, regs, data + tu->args[i].offset); head = this_cpu_ptr(call->perf_events); - perf_trace_buf_submit(entry, size, rctx, ip, 1, regs, head, NULL); + perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL); out: preempt_enable(); } |
