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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include <test_progs.h>
#include "trace_vprintk.lskel.h"
#define TRACEBUF "/sys/kernel/debug/tracing/trace_pipe"
#define SEARCHMSG "1,2,3,4,5,6,7,8,9,10"
void serial_test_trace_vprintk(void)
{
struct trace_vprintk_lskel__bss *bss;
int err = 0, iter = 0, found = 0;
struct trace_vprintk_lskel *skel;
char *buf = NULL;
FILE *fp = NULL;
size_t buflen;
skel = trace_vprintk_lskel__open_and_load();
if (!ASSERT_OK_PTR(skel, "trace_vprintk__open_and_load"))
goto cleanup;
bss = skel->bss;
err = trace_vprintk_lskel__attach(skel);
if (!ASSERT_OK(err, "trace_vprintk__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_vprintk_lskel__detach(skel);
if (!ASSERT_GT(bss->trace_vprintk_ran, 0, "bss->trace_vprintk_ran"))
goto cleanup;
if (!ASSERT_GT(bss->trace_vprintk_ret, 0, "bss->trace_vprintk_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_vprintk_ran)
break;
if (++iter > 1000)
break;
}
if (!ASSERT_EQ(found, bss->trace_vprintk_ran, "found"))
goto cleanup;
if (!ASSERT_LT(bss->null_data_vprintk_ret, 0, "bss->null_data_vprintk_ret"))
goto cleanup;
cleanup:
trace_vprintk_lskel__destroy(skel);
free(buf);
if (fp)
fclose(fp);
}
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