73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2020, Oracle and/or its affiliates. */
|
|
|
|
#include <test_progs.h>
|
|
|
|
#include "trace_printk.lskel.h"
|
|
|
|
#define TRACEBUF "/sys/kernel/debug/tracing/trace_pipe"
|
|
#define SEARCHMSG "testing,testing"
|
|
|
|
void serial_test_trace_printk(void)
|
|
{
|
|
struct trace_printk_lskel__bss *bss;
|
|
int err = 0, iter = 0, found = 0;
|
|
struct trace_printk_lskel *skel;
|
|
char *buf = NULL;
|
|
FILE *fp = NULL;
|
|
size_t buflen;
|
|
|
|
skel = trace_printk_lskel__open();
|
|
if (!ASSERT_OK_PTR(skel, "trace_printk__open"))
|
|
return;
|
|
|
|
ASSERT_EQ(skel->rodata->fmt[0], 'T', "skel->rodata->fmt[0]");
|
|
skel->rodata->fmt[0] = 't';
|
|
|
|
err = trace_printk_lskel__load(skel);
|
|
if (!ASSERT_OK(err, "trace_printk__load"))
|
|
goto cleanup;
|
|
|
|
bss = skel->bss;
|
|
|
|
err = trace_printk_lskel__attach(skel);
|
|
if (!ASSERT_OK(err, "trace_printk__attach"))
|
|
goto cleanup;
|
|
|
|
fp = fopen(TRACEBUF, "r");
|
|
if (!ASSERT_OK_PTR(fp, "fopen(TRACEBUF)"))
|
|
goto cleanup;
|
|
|
|
/* We do not want to wait forever if this test fails... */
|
|
fcntl(fileno(fp), F_SETFL, O_NONBLOCK);
|
|
|
|
/* wait for tracepoint to trigger */
|
|
usleep(1);
|
|
trace_printk_lskel__detach(skel);
|
|
|
|
if (!ASSERT_GT(bss->trace_printk_ran, 0, "bss->trace_printk_ran"))
|
|
goto cleanup;
|
|
|
|
if (!ASSERT_GT(bss->trace_printk_ret, 0, "bss->trace_printk_ret"))
|
|
goto cleanup;
|
|
|
|
/* verify our search string is in the trace buffer */
|
|
while (getline(&buf, &buflen, fp) >= 0 || errno == EAGAIN) {
|
|
if (strstr(buf, SEARCHMSG) != NULL)
|
|
found++;
|
|
if (found == bss->trace_printk_ran)
|
|
break;
|
|
if (++iter > 1000)
|
|
break;
|
|
}
|
|
|
|
if (!ASSERT_EQ(found, bss->trace_printk_ran, "found"))
|
|
goto cleanup;
|
|
|
|
cleanup:
|
|
trace_printk_lskel__destroy(skel);
|
|
free(buf);
|
|
if (fp)
|
|
fclose(fp);
|
|
}
|