1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2020, Oracle and/or its affiliates. */
 3
 4#include <test_progs.h>
 5
 6#include "trace_printk.lskel.h"
 7
 
 
 8#define SEARCHMSG	"testing,testing"
 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_printk(void)
17{
18	struct trace_printk_lskel__bss *bss;
 
19	struct trace_printk_lskel *skel;
20	int err = 0, found = 0;
 
 
21
22	skel = trace_printk_lskel__open();
23	if (!ASSERT_OK_PTR(skel, "trace_printk__open"))
24		return;
25
26	ASSERT_EQ(skel->rodata->fmt[0], 'T', "skel->rodata->fmt[0]");
27	skel->rodata->fmt[0] = 't';
28
29	err = trace_printk_lskel__load(skel);
30	if (!ASSERT_OK(err, "trace_printk__load"))
31		goto cleanup;
32
33	bss = skel->bss;
34
35	err = trace_printk_lskel__attach(skel);
36	if (!ASSERT_OK(err, "trace_printk__attach"))
37		goto cleanup;
38
 
 
 
 
 
 
 
 
 
 
39	/* wait for tracepoint to trigger */
40	usleep(1);
41	trace_printk_lskel__detach(skel);
42
43	if (!ASSERT_GT(bss->trace_printk_ran, 0, "bss->trace_printk_ran"))
44		goto cleanup;
45
46	if (!ASSERT_GT(bss->trace_printk_ret, 0, "bss->trace_printk_ret"))
47		goto cleanup;
48
49	/* verify our search string is in the trace buffer */
50	ASSERT_OK(read_trace_pipe_iter(trace_pipe_cb, &found, 1000),
51		 "read_trace_pipe_iter");
 
 
 
 
 
 
52
53	if (!ASSERT_EQ(found, bss->trace_printk_ran, "found"))
54		goto cleanup;
55
56cleanup:
57	trace_printk_lskel__destroy(skel);
 
 
 
58}

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2020, Oracle and/or its affiliates. */
 3
 4#include <test_progs.h>
 5
 6#include "trace_printk.lskel.h"
 7
 8#define TRACEFS_PIPE	"/sys/kernel/tracing/trace_pipe"
 9#define DEBUGFS_PIPE	"/sys/kernel/debug/tracing/trace_pipe"
10#define SEARCHMSG	"testing,testing"
11
 
 
 
 
 
 
12void serial_test_trace_printk(void)
13{
14	struct trace_printk_lskel__bss *bss;
15	int err = 0, iter = 0, found = 0;
16	struct trace_printk_lskel *skel;
17	char *buf = NULL;
18	FILE *fp = NULL;
19	size_t buflen;
20
21	skel = trace_printk_lskel__open();
22	if (!ASSERT_OK_PTR(skel, "trace_printk__open"))
23		return;
24
25	ASSERT_EQ(skel->rodata->fmt[0], 'T', "skel->rodata->fmt[0]");
26	skel->rodata->fmt[0] = 't';
27
28	err = trace_printk_lskel__load(skel);
29	if (!ASSERT_OK(err, "trace_printk__load"))
30		goto cleanup;
31
32	bss = skel->bss;
33
34	err = trace_printk_lskel__attach(skel);
35	if (!ASSERT_OK(err, "trace_printk__attach"))
36		goto cleanup;
37
38	if (access(TRACEFS_PIPE, F_OK) == 0)
39		fp = fopen(TRACEFS_PIPE, "r");
40	else
41		fp = fopen(DEBUGFS_PIPE, "r");
42	if (!ASSERT_OK_PTR(fp, "fopen(TRACE_PIPE)"))
43		goto cleanup;
44
45	/* We do not want to wait forever if this test fails... */
46	fcntl(fileno(fp), F_SETFL, O_NONBLOCK);
47
48	/* wait for tracepoint to trigger */
49	usleep(1);
50	trace_printk_lskel__detach(skel);
51
52	if (!ASSERT_GT(bss->trace_printk_ran, 0, "bss->trace_printk_ran"))
53		goto cleanup;
54
55	if (!ASSERT_GT(bss->trace_printk_ret, 0, "bss->trace_printk_ret"))
56		goto cleanup;
57
58	/* verify our search string is in the trace buffer */
59	while (getline(&buf, &buflen, fp) >= 0 || errno == EAGAIN) {
60		if (strstr(buf, SEARCHMSG) != NULL)
61			found++;
62		if (found == bss->trace_printk_ran)
63			break;
64		if (++iter > 1000)
65			break;
66	}
67
68	if (!ASSERT_EQ(found, bss->trace_printk_ran, "found"))
69		goto cleanup;
70
71cleanup:
72	trace_printk_lskel__destroy(skel);
73	free(buf);
74	if (fp)
75		fclose(fp);
76}