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600f634a SS |
1 | /* |
2 | * Copyright (C) 2013 Mentor Graphics | |
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 | ||
19 | #define _GNU_SOURCE | |
f02baefb | 20 | #include <lttng/ust-dlfcn.h> |
600f634a SS |
21 | #include <pthread.h> |
22 | ||
23 | #define TRACEPOINT_DEFINE | |
24 | #define TRACEPOINT_CREATE_PROBES | |
25 | #include "ust_pthread.h" | |
26 | ||
27 | static __thread int thread_in_trace; | |
28 | ||
29 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
30 | { | |
31 | static int (*mutex_lock)(pthread_mutex_t *); | |
32 | int retval; | |
33 | ||
34 | if (!mutex_lock) { | |
35 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
36 | if (!mutex_lock) { | |
37 | if (thread_in_trace) { | |
38 | abort(); | |
39 | } | |
40 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
41 | return EINVAL; | |
42 | } | |
43 | } | |
44 | if (thread_in_trace) { | |
45 | return mutex_lock(mutex); | |
46 | } | |
47 | ||
48 | thread_in_trace = 1; | |
49 | tracepoint(ust_pthread, pthread_mutex_lock_req, mutex); | |
50 | retval = mutex_lock(mutex); | |
51 | tracepoint(ust_pthread, pthread_mutex_lock_acq, mutex, retval); | |
52 | thread_in_trace = 0; | |
53 | return retval; | |
54 | } | |
55 | ||
56 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
57 | { | |
58 | static int (*mutex_trylock)(pthread_mutex_t *); | |
59 | int retval; | |
60 | ||
61 | if (!mutex_trylock) { | |
62 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
63 | if (!mutex_trylock) { | |
64 | if (thread_in_trace) { | |
65 | abort(); | |
66 | } | |
67 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
68 | return EINVAL; | |
69 | } | |
70 | } | |
71 | if (thread_in_trace) { | |
72 | return mutex_trylock(mutex); | |
73 | } | |
74 | ||
75 | thread_in_trace = 1; | |
76 | retval = mutex_trylock(mutex); | |
77 | tracepoint(ust_pthread, pthread_mutex_trylock, mutex, retval); | |
78 | thread_in_trace = 0; | |
79 | return retval; | |
80 | } | |
81 | ||
82 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
83 | { | |
84 | static int (*mutex_unlock)(pthread_mutex_t *); | |
85 | int retval; | |
86 | ||
87 | if (!mutex_unlock) { | |
88 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
89 | if (!mutex_unlock) { | |
90 | if (thread_in_trace) { | |
91 | abort(); | |
92 | } | |
93 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
94 | return EINVAL; | |
95 | } | |
96 | } | |
97 | if (thread_in_trace) { | |
98 | return mutex_unlock(mutex); | |
99 | } | |
100 | ||
101 | thread_in_trace = 1; | |
102 | retval = mutex_unlock(mutex); | |
103 | tracepoint(ust_pthread, pthread_mutex_unlock, mutex, retval); | |
104 | thread_in_trace = 0; | |
105 | return retval; | |
106 | } |