diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-03-30 18:02:12 +0100 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2013-04-13 15:32:01 +0200 |
| commit | a51cc6041773dd88ff35608f54274bfd6ac68652 (patch) | |
| tree | b7969268db40338d42c29d8ffb1787041d7d6760 /kernel/trace | |
| parent | 457d1772f1c1bcf37b2ae7fc8f1d6f303d1d5cf9 (diff) | |
uprobes/tracing: Introduce uprobe_{trace,perf}_print() helpers
Extract the output code from uprobe_trace_func() and uprobe_perf_func()
into the new helpers, they will be used by ->ret_handler() too. We also
add the unused "unsigned long func" argument in advance, to simplify the
next changes.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Tested-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 49b400368bfd..0c0f0a7d4ff1 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -497,8 +497,8 @@ static const struct file_operations uprobe_profile_ops = { .release = seq_release, }; -/* uprobe handler */ -static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs) +static void uprobe_trace_print(struct trace_uprobe *tu, + unsigned long func, struct pt_regs *regs) { struct uprobe_trace_entry_head *entry; struct ring_buffer_event *event; @@ -511,7 +511,7 @@ static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs) event = trace_current_buffer_lock_reserve(&buffer, call->event.type, size, 0, 0); if (!event) - return 0; + return; entry = ring_buffer_event_data(event); entry->vaddr[0] = instruction_pointer(regs); @@ -521,7 +521,12 @@ static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs) if (!filter_current_check_discard(buffer, call, entry, event)) trace_buffer_unlock_commit(buffer, event, 0, 0); +} +/* uprobe handler */ +static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs) +{ + uprobe_trace_print(tu, 0, regs); return 0; } @@ -754,8 +759,8 @@ static bool uprobe_perf_filter(struct uprobe_consumer *uc, return ret; } -/* uprobe profile handler */ -static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs) +static void uprobe_perf_print(struct trace_uprobe *tu, + unsigned long func, struct pt_regs *regs) { struct ftrace_event_call *call = &tu->call; struct uprobe_trace_entry_head *entry; @@ -764,13 +769,10 @@ static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs) void *data; int size, rctx, i; - if (!uprobe_perf_filter(&tu->consumer, 0, current->mm)) - return UPROBE_HANDLER_REMOVE; - size = SIZEOF_TRACE_ENTRY(false); size = ALIGN(size + tu->size + sizeof(u32), sizeof(u64)) - sizeof(u32); if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, "profile buffer not large enough")) - return 0; + return; preempt_disable(); entry = perf_trace_buf_prepare(size, call->event.type, regs, &rctx); @@ -787,6 +789,15 @@ static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs) perf_trace_buf_submit(entry, size, rctx, ip, 1, regs, head, NULL); out: preempt_enable(); +} + +/* uprobe profile handler */ +static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs) +{ + if (!uprobe_perf_filter(&tu->consumer, 0, current->mm)) + return UPROBE_HANDLER_REMOVE; + + uprobe_perf_print(tu, 0, regs); return 0; } #endif /* CONFIG_PERF_EVENTS */ |