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1 | /* |
2 | * Copyright (C) 2017 Francis Deslauriers <francis.deslauriers@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with this library; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | #ifndef _GNU_SOURCE | |
19 | #define _GNU_SOURCE | |
20 | #endif | |
21 | ||
22 | #include <dlfcn.h> | |
23 | #include <fcntl.h> | |
24 | #include <stdbool.h> | |
25 | #include <stdint.h> | |
26 | #include <stdio.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/types.h> | |
29 | ||
30 | #include <sys/sdt.h> | |
31 | ||
32 | #include "foobar_provider.h" | |
33 | #include "libfoo.h" | |
34 | #include "sema.h" | |
35 | ||
36 | int main(int argc, char *argv[]) | |
37 | { | |
38 | void *handle; | |
39 | void (*bar_function)(); | |
40 | ||
41 | FOOBAR_TP1(); | |
42 | FOOBAR_TP2(); | |
43 | /* | |
44 | * This SDT tracepoint has an argument. Argument extraction is not support | |
45 | * at the moment but tracing of the tracepoint should work. | |
46 | */ | |
47 | FOOBAR_TP_WITH_ARG(42); | |
48 | ||
49 | /* Call function containing an SDT tracepoint in shared object */ | |
50 | foo_function(); | |
51 | ||
52 | /* | |
53 | * Load a show shared object and call a function containing an SDT | |
54 | * tracepoint | |
55 | */ | |
56 | handle = dlopen("libbar.so", RTLD_LAZY); | |
57 | if (!handle) { | |
58 | fprintf(stderr, "Can't dlopen libbar.so"); | |
59 | return -1; | |
60 | } | |
61 | bar_function = (void (*)())dlsym(handle, "bar_function"); | |
62 | bar_function(); | |
63 | dlclose(handle); | |
64 | ||
65 | /* This tracepoint has 2 callsites in this binary */ | |
66 | FOOBAR_TP2(); | |
67 | ||
68 | /* | |
69 | * This function is defined in libfoo AND in libzzz. For a test, libzzz is | |
70 | * LD_PRELOADed and should override this function | |
71 | */ | |
72 | overridable_function(); | |
73 | ||
74 | /* | |
75 | * This function is calling a SDT tracepoint that is guarded by a | |
76 | * semaphore. | |
77 | */ | |
78 | sema_function(); | |
79 | return 0; | |
80 | } | |
81 |