| 1 | /* Copyright (C) 2010 David Goulet <david.goulet@polymtl.ca> |
| 2 | * |
| 3 | * This library is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of the GNU Lesser General Public |
| 5 | * License as published by the Free Software Foundation; either |
| 6 | * version 2.1 of the License, or (at your option) any later version. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * Lesser General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public |
| 14 | * License along with this library; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | /* |
| 19 | * This test is aimed at testing tracepoint *with* trace_mark : |
| 20 | * |
| 21 | * 1) tracepoint named : "ust_event" |
| 22 | * -) Probe 1 registered and recording the value 13 (x5) |
| 23 | * -) Probe 2 registered and recording the value 42 (x5) |
| 24 | * -) Probe 3 registered and recording the payload of the struct message |
| 25 | * but using a *different* tracepoint (event_msg) |
| 26 | * |
| 27 | * 2) tracepoint named : "ust_event2" |
| 28 | * -) Probe 4 registered and recording the value 42 (x100) |
| 29 | */ |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <ust/marker.h> |
| 33 | #include "tracepoint_test.h" |
| 34 | |
| 35 | DEFINE_TRACE(ust_event); |
| 36 | DEFINE_TRACE(ust_event2); |
| 37 | |
| 38 | static struct message msg_probe3 = { |
| 39 | .payload = "probe3", |
| 40 | }; |
| 41 | |
| 42 | /* |
| 43 | * Probe 4 --> ust_event2 |
| 44 | * Will record 100 times the value 42 |
| 45 | */ |
| 46 | void tp_probe4(void *data, unsigned int p4) |
| 47 | { |
| 48 | int i; |
| 49 | for (i = 0; i < 100; i++) { |
| 50 | trace_mark_tp(ust, event2, ust_event2, tp_probe4, "probe4 %u", p4); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | /* |
| 55 | * Probe 3 --> ust_event *and* event_msg (from inside) |
| 56 | * Will record the payload of msg_prob3 struct |
| 57 | * from the data pointer of the probe |
| 58 | */ |
| 59 | void tp_probe3(void *data, unsigned int p3) |
| 60 | { |
| 61 | struct message *msg; |
| 62 | msg = (struct message*) data; |
| 63 | trace_mark_tp(ust, event_msg, ust_event_msg, |
| 64 | tp_probe3, "probe %s", msg->payload); |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * Probe 2 --> ust_event |
| 69 | * Will record 5 times the number 13 |
| 70 | */ |
| 71 | void tp_probe2(void *data, unsigned int p2) |
| 72 | { |
| 73 | int i; |
| 74 | for (i = 0; i < 5; i++) { |
| 75 | trace_mark_tp(ust, event, ust_event, tp_probe2, "probe %u", 13); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | /* |
| 80 | * Probe 1 --> ust_event |
| 81 | * Will record 5 times the unsigned int v = 42 |
| 82 | */ |
| 83 | void tp_probe(void *data, unsigned int p1) |
| 84 | { |
| 85 | int i; |
| 86 | for (i = 0; i < 5; i++) { |
| 87 | trace_mark_tp(ust, event, ust_event, tp_probe, "probe %u", p1); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | static void __attribute__((constructor)) init() |
| 92 | { |
| 93 | register_trace_ust_event(tp_probe, NULL); |
| 94 | register_trace_ust_event(tp_probe2, NULL); |
| 95 | register_trace_ust_event(tp_probe3, &msg_probe3); |
| 96 | register_trace_ust_event2(tp_probe4, NULL); |
| 97 | } |
| 98 | |
| 99 | int main(int argc, char **argv) { |
| 100 | unsigned int v = 42; |
| 101 | /* Tracepoint 1 : ust_event */ |
| 102 | trace_ust_event(v); |
| 103 | /* Tracepoint 2 : ust_event2 */ |
| 104 | trace_ust_event2(v); |
| 105 | |
| 106 | return 0; |
| 107 | } |