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Diffstat (limited to 'kernel/trace/trace.c')
-rw-r--r--kernel/trace/trace.c94
1 files changed, 53 insertions, 41 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index eb453a2..8fad377 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -776,6 +776,39 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
(need_resched() ? TRACE_FLAG_NEED_RESCHED : 0);
}
+struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr,
+ unsigned char type,
+ unsigned long len,
+ unsigned long flags, int pc)
+{
+ struct ring_buffer_event *event;
+
+ event = ring_buffer_lock_reserve(tr->buffer, len);
+ if (event != NULL) {
+ struct trace_entry *ent = ring_buffer_event_data(event);
+
+ tracing_generic_entry_update(ent, flags, pc);
+ ent->type = type;
+ }
+
+ return event;
+}
+static void ftrace_trace_stack(struct trace_array *tr,
+ unsigned long flags, int skip, int pc);
+static void ftrace_trace_userstack(struct trace_array *tr,
+ unsigned long flags, int pc);
+
+void trace_buffer_unlock_commit(struct trace_array *tr,
+ struct ring_buffer_event *event,
+ unsigned long flags, int pc)
+{
+ ring_buffer_unlock_commit(tr->buffer, event);
+
+ ftrace_trace_stack(tr, flags, 6, pc);
+ ftrace_trace_userstack(tr, flags, pc);
+ trace_wake_up();
+}
+
void
trace_function(struct trace_array *tr,
unsigned long ip, unsigned long parent_ip, unsigned long flags,
@@ -788,12 +821,11 @@ trace_function(struct trace_array *tr,
if (unlikely(local_read(&__get_cpu_var(ftrace_cpu_disabled))))
return;
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(tr, TRACE_FN, sizeof(*entry),
+ flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_FN;
entry->ip = ip;
entry->parent_ip = parent_ip;
ring_buffer_unlock_commit(tr->buffer, event);
@@ -811,12 +843,11 @@ static void __trace_graph_entry(struct trace_array *tr,
if (unlikely(local_read(&__get_cpu_var(ftrace_cpu_disabled))))
return;
- event = ring_buffer_lock_reserve(global_trace.buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(&global_trace, TRACE_GRAPH_ENT,
+ sizeof(*entry), flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_GRAPH_ENT;
entry->graph_ent = *trace;
ring_buffer_unlock_commit(global_trace.buffer, event);
}
@@ -832,12 +863,11 @@ static void __trace_graph_return(struct trace_array *tr,
if (unlikely(local_read(&__get_cpu_var(ftrace_cpu_disabled))))
return;
- event = ring_buffer_lock_reserve(global_trace.buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(&global_trace, TRACE_GRAPH_RET,
+ sizeof(*entry), flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_GRAPH_RET;
entry->ret = *trace;
ring_buffer_unlock_commit(global_trace.buffer, event);
}
@@ -861,13 +891,11 @@ static void __ftrace_trace_stack(struct trace_array *tr,
struct stack_entry *entry;
struct stack_trace trace;
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(tr, TRACE_STACK,
+ sizeof(*entry), flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_STACK;
-
memset(&entry->caller, 0, sizeof(entry->caller));
trace.nr_entries = 0;
@@ -908,12 +936,11 @@ static void ftrace_trace_userstack(struct trace_array *tr,
if (!(trace_flags & TRACE_ITER_USERSTACKTRACE))
return;
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(tr, TRACE_USER_STACK,
+ sizeof(*entry), flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_USER_STACK;
memset(&entry->caller, 0, sizeof(entry->caller));
@@ -941,20 +968,15 @@ ftrace_trace_special(void *__tr,
struct trace_array *tr = __tr;
struct special_entry *entry;
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(tr, TRACE_SPECIAL,
+ sizeof(*entry), 0, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, 0, pc);
- entry->ent.type = TRACE_SPECIAL;
entry->arg1 = arg1;
entry->arg2 = arg2;
entry->arg3 = arg3;
- ring_buffer_unlock_commit(tr->buffer, event);
- ftrace_trace_stack(tr, 0, 4, pc);
- ftrace_trace_userstack(tr, 0, pc);
-
- trace_wake_up();
+ trace_buffer_unlock_commit(tr, event, 0, pc);
}
void
@@ -973,12 +995,11 @@ tracing_sched_switch_trace(struct trace_array *tr,
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(tr, TRACE_CTX,
+ sizeof(*entry), flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_CTX;
entry->prev_pid = prev->pid;
entry->prev_prio = prev->prio;
entry->prev_state = prev->state;
@@ -986,9 +1007,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
entry->next_prio = next->prio;
entry->next_state = next->state;
entry->next_cpu = task_cpu(next);
- ring_buffer_unlock_commit(tr->buffer, event);
- ftrace_trace_stack(tr, flags, 5, pc);
- ftrace_trace_userstack(tr, flags, pc);
+ trace_buffer_unlock_commit(tr, event, flags, pc);
}
void
@@ -1000,12 +1019,11 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ event = trace_buffer_lock_reserve(tr, TRACE_WAKE,
+ sizeof(*entry), flags, pc);
if (!event)
return;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, flags, pc);
- entry->ent.type = TRACE_WAKE;
entry->prev_pid = curr->pid;
entry->prev_prio = curr->prio;
entry->prev_state = curr->state;
@@ -1013,11 +1031,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
entry->next_prio = wakee->prio;
entry->next_state = wakee->state;
entry->next_cpu = task_cpu(wakee);
- ring_buffer_unlock_commit(tr->buffer, event);
- ftrace_trace_stack(tr, flags, 6, pc);
- ftrace_trace_userstack(tr, flags, pc);
-
- trace_wake_up();
+ trace_buffer_unlock_commit(tr, event, flags, pc);
}
void
@@ -2825,12 +2839,10 @@ int trace_vprintk(unsigned long ip, int depth, const char *fmt, va_list args)
trace_buf[len] = 0;
size = sizeof(*entry) + len + 1;
- event = ring_buffer_lock_reserve(tr->buffer, size);
+ event = trace_buffer_lock_reserve(tr, TRACE_PRINT, size, irq_flags, pc);
if (!event)
goto out_unlock;
entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, irq_flags, pc);
- entry->ent.type = TRACE_PRINT;
entry->ip = ip;
entry->depth = depth;
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