55 lines · c
1// SPDX-License-Identifier: GPL-2.02/* 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}55