Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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}