1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2021 Facebook */
 3
 4#include <test_progs.h>
 5
 6#include "trace_vprintk.lskel.h"
 7
 8#define SEARCHMSG	"1,2,3,4,5,6,7,8,9,10"
 9
10static void trace_pipe_cb(const char *str, void *data)
11{
12	if (strstr(str, SEARCHMSG) != NULL)
13		(*(int *)data)++;
14}
15
16void serial_test_trace_vprintk(void)
17{
18	struct trace_vprintk_lskel__bss *bss;
19	struct trace_vprintk_lskel *skel;
20	int err = 0, found = 0;
21
22	skel = trace_vprintk_lskel__open_and_load();
23	if (!ASSERT_OK_PTR(skel, "trace_vprintk__open_and_load"))
24		goto cleanup;
25
26	bss = skel->bss;
27
28	err = trace_vprintk_lskel__attach(skel);
29	if (!ASSERT_OK(err, "trace_vprintk__attach"))
30		goto cleanup;
31
32	/* wait for tracepoint to trigger */
33	usleep(1);
34	trace_vprintk_lskel__detach(skel);
35
36	if (!ASSERT_GT(bss->trace_vprintk_ran, 0, "bss->trace_vprintk_ran"))
37		goto cleanup;
38
39	if (!ASSERT_GT(bss->trace_vprintk_ret, 0, "bss->trace_vprintk_ret"))
40		goto cleanup;
41
42	/* verify our search string is in the trace buffer */
43	ASSERT_OK(read_trace_pipe_iter(trace_pipe_cb, &found, 1000),
44		 "read_trace_pipe_iter");
45
46	if (!ASSERT_EQ(found, bss->trace_vprintk_ran, "found"))
47		goto cleanup;
48
49	if (!ASSERT_LT(bss->null_data_vprintk_ret, 0, "bss->null_data_vprintk_ret"))
50		goto cleanup;
51
52cleanup:
53	trace_vprintk_lskel__destroy(skel);
54}