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Extend trace_printk coverage to verify that UTF-8 literal text is emitted successfully and that '%' parsing still rejects non-ASCII bytes once format parsing starts. Use an explicitly invalid format string for the negative case so the ASCII-only parser expectation is visible from the test code itself. Signed-off-by: Yihan Ding <dingyihan@uniontech.com> Acked-by: Paul Chaignon <paul.chaignon@gmail.com> Link: https://lore.kernel.org/r/20260416120142.1420646-3-dingyihan@uniontech.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020, Oracle and/or its affiliates. */
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#include <test_progs.h>
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#include "trace_printk.lskel.h"
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#define SEARCHMSG "testing,testing"
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#define SEARCHMSG_UTF8 "中文,测试"
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static void trace_pipe_cb(const char *str, void *data)
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{
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if (strstr(str, SEARCHMSG) != NULL)
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((int *)data)[0]++;
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if (strstr(str, SEARCHMSG_UTF8))
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((int *)data)[1]++;
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}
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void serial_test_trace_printk(void)
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{
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struct trace_printk_lskel__bss *bss;
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struct trace_printk_lskel *skel;
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int err = 0, found[2] = {};
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skel = trace_printk_lskel__open();
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if (!ASSERT_OK_PTR(skel, "trace_printk__open"))
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return;
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ASSERT_EQ(skel->rodata->fmt[0], 'T', "skel->rodata->fmt[0]");
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skel->rodata->fmt[0] = 't';
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err = trace_printk_lskel__load(skel);
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if (!ASSERT_OK(err, "trace_printk__load"))
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goto cleanup;
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bss = skel->bss;
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err = trace_printk_lskel__attach(skel);
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if (!ASSERT_OK(err, "trace_printk__attach"))
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goto cleanup;
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/* wait for tracepoint to trigger */
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usleep(1);
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trace_printk_lskel__detach(skel);
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if (!ASSERT_GT(bss->trace_printk_ran, 0, "bss->trace_printk_ran"))
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goto cleanup;
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if (!ASSERT_GT(bss->trace_printk_ret, 0, "bss->trace_printk_ret"))
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goto cleanup;
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if (!ASSERT_GT(bss->trace_printk_utf8_ran, 0, "bss->trace_printk_utf8_ran"))
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goto cleanup;
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if (!ASSERT_GT(bss->trace_printk_utf8_ret, 0, "bss->trace_printk_utf8_ret"))
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goto cleanup;
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if (!ASSERT_LT(bss->trace_printk_invalid_spec_ret, 0,
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"bss->trace_printk_invalid_spec_ret"))
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goto cleanup;
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/* verify our search strings are in the trace buffer */
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ASSERT_OK(read_trace_pipe_iter(trace_pipe_cb, found, 1000),
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"read_trace_pipe_iter");
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if (!ASSERT_EQ(found[0], bss->trace_printk_ran, "found"))
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goto cleanup;
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if (!ASSERT_EQ(found[1], bss->trace_printk_utf8_ran, "found_utf8"))
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goto cleanup;
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cleanup:
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trace_printk_lskel__destroy(skel);
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}
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