ftrace: bin-output (cb0f12aa) · Commits · e / devices / android_kernel_teracube_2e

kernel/trace/trace.c

+50 −0

Original line number	Diff line number	Diff line
		@@ -154,6 +154,7 @@ enum trace_iterator_flags {
		TRACE_ITER_SYM_ADDR = 0x04,
		TRACE_ITER_VERBOSE = 0x08,
		TRACE_ITER_RAW = 0x10,
		TRACE_ITER_BIN = 0x20,
		};

		#define TRACE_ITER_SYM_MASK \
		@@ -166,6 +167,7 @@ static const char *trace_options[] = {
		"sym-addr",
		"verbose",
		"raw",
		"bin",
		NULL
		};

		@@ -275,6 +277,18 @@ trace_seq_putc(struct trace_seq *s, unsigned char c)
		return 1;
		}

		static notrace int
		trace_seq_putmem(struct trace_seq s, void mem, size_t len)
		{
		if (len > ((PAGE_SIZE - 1) - s->len))
		return 0;

		memcpy(s->buffer + s->len, mem, len);
		s->len += len;

		return len;
		}

		static notrace void
		trace_seq_reset(struct trace_seq *s)
		{
		@@ -1261,6 +1275,39 @@ static notrace int print_raw_fmt(struct trace_iterator *iter)
		return 1;
		}

		#define SEQ_PUT_FIELD_RET(s, x) \
		do { \
		if (!trace_seq_putmem(s, &(x), sizeof(x))) \
		return 0; \
		} while (0)

		static notrace int print_bin_fmt(struct trace_iterator *iter)
		{
		struct trace_seq *s = &iter->seq;
		struct trace_entry *entry;

		entry = iter->ent;

		SEQ_PUT_FIELD_RET(s, entry->pid);
		SEQ_PUT_FIELD_RET(s, entry->cpu);
		SEQ_PUT_FIELD_RET(s, entry->t);

		switch (entry->type) {
		case TRACE_FN:
		SEQ_PUT_FIELD_RET(s, entry->fn.ip);
		SEQ_PUT_FIELD_RET(s, entry->fn.parent_ip);
		break;
		case TRACE_CTX:
		SEQ_PUT_FIELD_RET(s, entry->ctx.prev_pid);
		SEQ_PUT_FIELD_RET(s, entry->ctx.prev_prio);
		SEQ_PUT_FIELD_RET(s, entry->ctx.prev_state);
		SEQ_PUT_FIELD_RET(s, entry->ctx.next_pid);
		SEQ_PUT_FIELD_RET(s, entry->ctx.next_prio);
		break;
		}
		return 1;
		}

		static int trace_empty(struct trace_iterator *iter)
		{
		struct trace_array_cpu *data;
		@@ -1279,6 +1326,9 @@ static int trace_empty(struct trace_iterator *iter)

		static int print_trace_line(struct trace_iterator *iter)
		{
		if (trace_flags & TRACE_ITER_BIN)
		return print_bin_fmt(iter);

		if (trace_flags & TRACE_ITER_RAW)
		return print_raw_fmt(iter);