diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 44 | ||||
| -rw-r--r-- | kernel/trace/trace.h | 15 |
2 files changed, 59 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d78cbc4fc519..fa13059eb462 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -137,6 +137,7 @@ enum trace_type { TRACE_FN, TRACE_CTX, + TRACE_SPECIAL, __TRACE_LAST_TYPE }; @@ -701,6 +702,22 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data, } notrace void +trace_special(struct trace_array *tr, struct trace_array_cpu *data, + unsigned long arg1, unsigned long arg2, unsigned long arg3) +{ + struct trace_entry *entry; + + spin_lock(&data->lock); + entry = tracing_get_trace_entry(tr, data); + tracing_generic_entry_update(entry, 0); + entry->type = TRACE_SPECIAL; + entry->special.arg1 = arg1; + entry->special.arg2 = arg2; + entry->special.arg3 = arg3; + spin_unlock(&data->lock); +} + +notrace void tracing_sched_switch_trace(struct trace_array *tr, struct trace_array_cpu *data, struct task_struct *prev, struct task_struct *next, @@ -1167,6 +1184,12 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu) entry->ctx.next_prio, comm); break; + case TRACE_SPECIAL: + trace_seq_printf(s, " %lx %lx %lx\n", + entry->special.arg1, + entry->special.arg2, + entry->special.arg3); + break; default: trace_seq_printf(s, "Unknown type %d\n", entry->type); } @@ -1234,6 +1257,14 @@ static notrace int print_trace_fmt(struct trace_iterator *iter) if (!ret) return 0; break; + case TRACE_SPECIAL: + ret = trace_seq_printf(s, " %lx %lx %lx\n", + entry->special.arg1, + entry->special.arg2, + entry->special.arg3); + if (!ret) + return 0; + break; } return 1; } @@ -1271,6 +1302,14 @@ static notrace int print_raw_fmt(struct trace_iterator *iter) if (!ret) return 0; break; + case TRACE_SPECIAL: + ret = trace_seq_printf(s, " %lx %lx %lx\n", + entry->special.arg1, + entry->special.arg2, + entry->special.arg3); + if (!ret) + return 0; + break; } return 1; } @@ -1304,6 +1343,11 @@ static notrace int print_bin_fmt(struct trace_iterator *iter) SEQ_PUT_FIELD_RET(s, entry->ctx.next_pid); SEQ_PUT_FIELD_RET(s, entry->ctx.next_prio); break; + case TRACE_SPECIAL: + SEQ_PUT_FIELD_RET(s, entry->special.arg1); + SEQ_PUT_FIELD_RET(s, entry->special.arg2); + SEQ_PUT_FIELD_RET(s, entry->special.arg3); + break; } return 1; } diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 27fa2d06f499..7bdfef35c05a 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -26,6 +26,15 @@ struct ctx_switch_entry { }; /* + * Special (free-form) trace entry: + */ +struct special_entry { + unsigned long arg1; + unsigned long arg2; + unsigned long arg3; +}; + +/* * The trace entry - the most basic unit of tracing. This is what * is printed in the end as a single line in the trace output, such as: * @@ -41,6 +50,7 @@ struct trace_entry { union { struct ftrace_entry fn; struct ctx_switch_entry ctx; + struct special_entry special; }; }; @@ -154,6 +164,11 @@ void tracing_sched_switch_trace(struct trace_array *tr, struct task_struct *next, unsigned long flags); void tracing_record_cmdline(struct task_struct *tsk); +void trace_special(struct trace_array *tr, + struct trace_array_cpu *data, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3); void tracing_start_function_trace(void); void tracing_stop_function_trace(void); |