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path: root/kernel/trace/trace_output.c
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Diffstat (limited to 'kernel/trace/trace_output.c')
-rw-r--r--kernel/trace/trace_output.c119
1 files changed, 110 insertions, 9 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 697e88d13907..bb922d9ee51b 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -14,7 +14,7 @@
/* must be a power of 2 */
#define EVENT_HASHSIZE 128
-DECLARE_RWSEM(trace_event_mutex);
+DECLARE_RWSEM(trace_event_sem);
static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
@@ -37,6 +37,22 @@ int trace_print_seq(struct seq_file *m, struct trace_seq *s)
return ret;
}
+enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
+{
+ struct trace_seq *s = &iter->seq;
+ struct trace_entry *entry = iter->ent;
+ struct bputs_entry *field;
+ int ret;
+
+ trace_assign_type(field, entry);
+
+ ret = trace_seq_puts(s, field->str);
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+
+ return TRACE_TYPE_HANDLED;
+}
+
enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
@@ -397,6 +413,32 @@ ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
}
EXPORT_SYMBOL(ftrace_print_hex_seq);
+int ftrace_raw_output_prep(struct trace_iterator *iter,
+ struct trace_event *trace_event)
+{
+ struct ftrace_event_call *event;
+ struct trace_seq *s = &iter->seq;
+ struct trace_seq *p = &iter->tmp_seq;
+ struct trace_entry *entry;
+ int ret;
+
+ event = container_of(trace_event, struct ftrace_event_call, event);
+ entry = iter->ent;
+
+ if (entry->type != event->event.type) {
+ WARN_ON_ONCE(1);
+ return TRACE_TYPE_UNHANDLED;
+ }
+
+ trace_seq_init(p);
+ ret = trace_seq_printf(s, "%s: ", event->name);
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+
+ return 0;
+}
+EXPORT_SYMBOL(ftrace_raw_output_prep);
+
#ifdef CONFIG_KRETPROBES
static inline const char *kretprobed(const char *name)
{
@@ -617,7 +659,7 @@ lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
{
unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
- unsigned long long abs_ts = iter->ts - iter->tr->time_start;
+ unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
unsigned long long rel_ts = next_ts - iter->ts;
struct trace_seq *s = &iter->seq;
@@ -783,12 +825,12 @@ static int trace_search_list(struct list_head **list)
void trace_event_read_lock(void)
{
- down_read(&trace_event_mutex);
+ down_read(&trace_event_sem);
}
void trace_event_read_unlock(void)
{
- up_read(&trace_event_mutex);
+ up_read(&trace_event_sem);
}
/**
@@ -811,7 +853,7 @@ int register_ftrace_event(struct trace_event *event)
unsigned key;
int ret = 0;
- down_write(&trace_event_mutex);
+ down_write(&trace_event_sem);
if (WARN_ON(!event))
goto out;
@@ -866,14 +908,14 @@ int register_ftrace_event(struct trace_event *event)
ret = event->type;
out:
- up_write(&trace_event_mutex);
+ up_write(&trace_event_sem);
return ret;
}
EXPORT_SYMBOL_GPL(register_ftrace_event);
/*
- * Used by module code with the trace_event_mutex held for write.
+ * Used by module code with the trace_event_sem held for write.
*/
int __unregister_ftrace_event(struct trace_event *event)
{
@@ -888,9 +930,9 @@ int __unregister_ftrace_event(struct trace_event *event)
*/
int unregister_ftrace_event(struct trace_event *event)
{
- down_write(&trace_event_mutex);
+ down_write(&trace_event_sem);
__unregister_ftrace_event(event);
- up_write(&trace_event_mutex);
+ up_write(&trace_event_sem);
return 0;
}
@@ -1217,6 +1259,64 @@ static struct trace_event trace_user_stack_event = {
.funcs = &trace_user_stack_funcs,
};
+/* TRACE_BPUTS */
+static enum print_line_t
+trace_bputs_print(struct trace_iterator *iter, int flags,
+ struct trace_event *event)
+{
+ struct trace_entry *entry = iter->ent;
+ struct trace_seq *s = &iter->seq;
+ struct bputs_entry *field;
+
+ trace_assign_type(field, entry);
+
+ if (!seq_print_ip_sym(s, field->ip, flags))
+ goto partial;
+
+ if (!trace_seq_puts(s, ": "))
+ goto partial;
+
+ if (!trace_seq_puts(s, field->str))
+ goto partial;
+
+ return TRACE_TYPE_HANDLED;
+
+ partial:
+ return TRACE_TYPE_PARTIAL_LINE;
+}
+
+
+static enum print_line_t
+trace_bputs_raw(struct trace_iterator *iter, int flags,
+ struct trace_event *event)
+{
+ struct bputs_entry *field;
+ struct trace_seq *s = &iter->seq;
+
+ trace_assign_type(field, iter->ent);
+
+ if (!trace_seq_printf(s, ": %lx : ", field->ip))
+ goto partial;
+
+ if (!trace_seq_puts(s, field->str))
+ goto partial;
+
+ return TRACE_TYPE_HANDLED;
+
+ partial:
+ return TRACE_TYPE_PARTIAL_LINE;
+}
+
+static struct trace_event_functions trace_bputs_funcs = {
+ .trace = trace_bputs_print,
+ .raw = trace_bputs_raw,
+};
+
+static struct trace_event trace_bputs_event = {
+ .type = TRACE_BPUTS,
+ .funcs = &trace_bputs_funcs,
+};
+
/* TRACE_BPRINT */
static enum print_line_t
trace_bprint_print(struct trace_iterator *iter, int flags,
@@ -1329,6 +1429,7 @@ static struct trace_event *events[] __initdata = {
&trace_wake_event,
&trace_stack_event,
&trace_user_stack_event,
+ &trace_bputs_event,
&trace_bprint_event,
&trace_print_event,
NULL