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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 | |
1ddceb36 | 20 | #define _LGPL_SOURCE |
f02baefb | 21 | #include <lttng/ust-dlfcn.h> |
171fcc6f | 22 | #include <helper.h> |
600f634a SS |
23 | #include <pthread.h> |
24 | ||
25 | #define TRACEPOINT_DEFINE | |
26 | #define TRACEPOINT_CREATE_PROBES | |
35176231 | 27 | #define TP_IP_PARAM ip |
600f634a SS |
28 | #include "ust_pthread.h" |
29 | ||
30 | static __thread int thread_in_trace; | |
31 | ||
32 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
33 | { | |
34 | static int (*mutex_lock)(pthread_mutex_t *); | |
35 | int retval; | |
36 | ||
37 | if (!mutex_lock) { | |
38 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
39 | if (!mutex_lock) { | |
40 | if (thread_in_trace) { | |
41 | abort(); | |
42 | } | |
43 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
44 | return EINVAL; | |
45 | } | |
46 | } | |
47 | if (thread_in_trace) { | |
48 | return mutex_lock(mutex); | |
49 | } | |
50 | ||
51 | thread_in_trace = 1; | |
35176231 | 52 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_req, mutex, |
171fcc6f | 53 | LTTNG_UST_CALLER_IP()); |
600f634a | 54 | retval = mutex_lock(mutex); |
35176231 | 55 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_acq, mutex, |
171fcc6f | 56 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
57 | thread_in_trace = 0; |
58 | return retval; | |
59 | } | |
60 | ||
61 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
62 | { | |
63 | static int (*mutex_trylock)(pthread_mutex_t *); | |
64 | int retval; | |
65 | ||
66 | if (!mutex_trylock) { | |
67 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
68 | if (!mutex_trylock) { | |
69 | if (thread_in_trace) { | |
70 | abort(); | |
71 | } | |
72 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
73 | return EINVAL; | |
74 | } | |
75 | } | |
76 | if (thread_in_trace) { | |
77 | return mutex_trylock(mutex); | |
78 | } | |
79 | ||
80 | thread_in_trace = 1; | |
81 | retval = mutex_trylock(mutex); | |
35176231 | 82 | tracepoint(lttng_ust_pthread, pthread_mutex_trylock, mutex, |
171fcc6f | 83 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
84 | thread_in_trace = 0; |
85 | return retval; | |
86 | } | |
87 | ||
88 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
89 | { | |
90 | static int (*mutex_unlock)(pthread_mutex_t *); | |
91 | int retval; | |
92 | ||
93 | if (!mutex_unlock) { | |
94 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
95 | if (!mutex_unlock) { | |
96 | if (thread_in_trace) { | |
97 | abort(); | |
98 | } | |
99 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
100 | return EINVAL; | |
101 | } | |
102 | } | |
103 | if (thread_in_trace) { | |
104 | return mutex_unlock(mutex); | |
105 | } | |
106 | ||
107 | thread_in_trace = 1; | |
108 | retval = mutex_unlock(mutex); | |
35176231 | 109 | tracepoint(lttng_ust_pthread, pthread_mutex_unlock, mutex, |
171fcc6f | 110 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
111 | thread_in_trace = 0; |
112 | return retval; | |
113 | } |