17606729fSDave Marchevsky // SPDX-License-Identifier: GPL-2.0
27606729fSDave Marchevsky /* Copyright (c) 2021 Facebook */
37606729fSDave Marchevsky
47606729fSDave Marchevsky #include "vmlinux.h"
57606729fSDave Marchevsky #include <bpf/bpf_helpers.h>
67606729fSDave Marchevsky #include <bpf/bpf_tracing.h>
7*e91d280cSNaveen N. Rao #include "bpf_misc.h"
87606729fSDave Marchevsky
97606729fSDave Marchevsky char _license[] SEC("license") = "GPL";
107606729fSDave Marchevsky
117606729fSDave Marchevsky int null_data_vprintk_ret = 0;
127606729fSDave Marchevsky int trace_vprintk_ret = 0;
137606729fSDave Marchevsky int trace_vprintk_ran = 0;
147606729fSDave Marchevsky
15*e91d280cSNaveen N. Rao SEC("fentry/" SYS_PREFIX "sys_nanosleep")
sys_enter(void * ctx)167606729fSDave Marchevsky int sys_enter(void *ctx)
177606729fSDave Marchevsky {
187606729fSDave Marchevsky static const char one[] = "1";
197606729fSDave Marchevsky static const char three[] = "3";
207606729fSDave Marchevsky static const char five[] = "5";
217606729fSDave Marchevsky static const char seven[] = "7";
227606729fSDave Marchevsky static const char nine[] = "9";
237606729fSDave Marchevsky static const char f[] = "%pS\n";
247606729fSDave Marchevsky
257606729fSDave Marchevsky /* runner doesn't search for \t, just ensure it compiles */
267606729fSDave Marchevsky bpf_printk("\t");
277606729fSDave Marchevsky
287606729fSDave Marchevsky trace_vprintk_ret = __bpf_vprintk("%s,%d,%s,%d,%s,%d,%s,%d,%s,%d %d\n",
297606729fSDave Marchevsky one, 2, three, 4, five, 6, seven, 8, nine, 10, ++trace_vprintk_ran);
307606729fSDave Marchevsky
317606729fSDave Marchevsky /* non-NULL fmt w/ NULL data should result in error */
327606729fSDave Marchevsky null_data_vprintk_ret = bpf_trace_vprintk(f, sizeof(f), NULL, 0);
337606729fSDave Marchevsky return 0;
347606729fSDave Marchevsky }
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