35 lines
932 B
C
35 lines
932 B
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include "bpf_misc.h"
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char _license[] SEC("license") = "GPL";
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int null_data_vprintk_ret = 0;
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int trace_vprintk_ret = 0;
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int trace_vprintk_ran = 0;
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SEC("fentry/" SYS_PREFIX "sys_nanosleep")
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int sys_enter(void *ctx)
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{
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static const char one[] = "1";
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static const char three[] = "3";
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static const char five[] = "5";
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static const char seven[] = "7";
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static const char nine[] = "9";
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static const char f[] = "%pS\n";
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/* runner doesn't search for \t, just ensure it compiles */
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bpf_printk("\t");
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trace_vprintk_ret = __bpf_vprintk("%s,%d,%s,%d,%s,%d,%s,%d,%s,%d %d\n",
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one, 2, three, 4, five, 6, seven, 8, nine, 10, ++trace_vprintk_ran);
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/* non-NULL fmt w/ NULL data should result in error */
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null_data_vprintk_ret = bpf_trace_vprintk(f, sizeof(f), NULL, 0);
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return 0;
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}
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