Commit | Line | Data |
---|---|---|
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> |
1de7abff | 21 | #include <helper.h> |
600f634a SS |
22 | #include <pthread.h> |
23 | ||
24 | #define TRACEPOINT_DEFINE | |
25 | #define TRACEPOINT_CREATE_PROBES | |
35176231 | 26 | #define TP_IP_PARAM ip |
600f634a SS |
27 | #include "ust_pthread.h" |
28 | ||
29 | static __thread int thread_in_trace; | |
30 | ||
31 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
32 | { | |
33 | static int (*mutex_lock)(pthread_mutex_t *); | |
34 | int retval; | |
35 | ||
36 | if (!mutex_lock) { | |
37 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
38 | if (!mutex_lock) { | |
39 | if (thread_in_trace) { | |
40 | abort(); | |
41 | } | |
42 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
43 | return EINVAL; | |
44 | } | |
45 | } | |
46 | if (thread_in_trace) { | |
47 | return mutex_lock(mutex); | |
48 | } | |
49 | ||
50 | thread_in_trace = 1; | |
35176231 | 51 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_req, mutex, |
1de7abff | 52 | LTTNG_UST_CALLER_IP()); |
600f634a | 53 | retval = mutex_lock(mutex); |
35176231 | 54 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_acq, mutex, |
1de7abff | 55 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
56 | thread_in_trace = 0; |
57 | return retval; | |
58 | } | |
59 | ||
60 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
61 | { | |
62 | static int (*mutex_trylock)(pthread_mutex_t *); | |
63 | int retval; | |
64 | ||
65 | if (!mutex_trylock) { | |
66 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
67 | if (!mutex_trylock) { | |
68 | if (thread_in_trace) { | |
69 | abort(); | |
70 | } | |
71 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
72 | return EINVAL; | |
73 | } | |
74 | } | |
75 | if (thread_in_trace) { | |
76 | return mutex_trylock(mutex); | |
77 | } | |
78 | ||
79 | thread_in_trace = 1; | |
80 | retval = mutex_trylock(mutex); | |
35176231 | 81 | tracepoint(lttng_ust_pthread, pthread_mutex_trylock, mutex, |
1de7abff | 82 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
83 | thread_in_trace = 0; |
84 | return retval; | |
85 | } | |
86 | ||
87 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
88 | { | |
89 | static int (*mutex_unlock)(pthread_mutex_t *); | |
90 | int retval; | |
91 | ||
92 | if (!mutex_unlock) { | |
93 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
94 | if (!mutex_unlock) { | |
95 | if (thread_in_trace) { | |
96 | abort(); | |
97 | } | |
98 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
99 | return EINVAL; | |
100 | } | |
101 | } | |
102 | if (thread_in_trace) { | |
103 | return mutex_unlock(mutex); | |
104 | } | |
105 | ||
106 | thread_in_trace = 1; | |
107 | retval = mutex_unlock(mutex); | |
35176231 | 108 | tracepoint(lttng_ust_pthread, pthread_mutex_unlock, mutex, |
1de7abff | 109 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
110 | thread_in_trace = 0; |
111 | return retval; | |
112 | } |