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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 | ||
d7e89462 MD |
19 | /* |
20 | * Do _not_ define _LGPL_SOURCE because we don't want to create a | |
21 | * circular dependency loop between this malloc wrapper, liburcu and | |
22 | * libc. | |
23 | */ | |
f02baefb | 24 | #include <lttng/ust-dlfcn.h> |
171fcc6f | 25 | #include <helper.h> |
600f634a SS |
26 | #include <pthread.h> |
27 | ||
28 | #define TRACEPOINT_DEFINE | |
29 | #define TRACEPOINT_CREATE_PROBES | |
35176231 | 30 | #define TP_IP_PARAM ip |
600f634a SS |
31 | #include "ust_pthread.h" |
32 | ||
16adecf1 | 33 | static __thread int thread_in_trace; |
600f634a SS |
34 | |
35 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
36 | { | |
37 | static int (*mutex_lock)(pthread_mutex_t *); | |
38 | int retval; | |
39 | ||
40 | if (!mutex_lock) { | |
41 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
42 | if (!mutex_lock) { | |
43 | if (thread_in_trace) { | |
44 | abort(); | |
45 | } | |
46 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
47 | return EINVAL; | |
48 | } | |
49 | } | |
50 | if (thread_in_trace) { | |
51 | return mutex_lock(mutex); | |
52 | } | |
53 | ||
54 | thread_in_trace = 1; | |
35176231 | 55 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_req, mutex, |
171fcc6f | 56 | LTTNG_UST_CALLER_IP()); |
600f634a | 57 | retval = mutex_lock(mutex); |
35176231 | 58 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_acq, mutex, |
171fcc6f | 59 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
60 | thread_in_trace = 0; |
61 | return retval; | |
62 | } | |
63 | ||
64 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
65 | { | |
66 | static int (*mutex_trylock)(pthread_mutex_t *); | |
67 | int retval; | |
68 | ||
69 | if (!mutex_trylock) { | |
70 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
71 | if (!mutex_trylock) { | |
72 | if (thread_in_trace) { | |
73 | abort(); | |
74 | } | |
75 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
76 | return EINVAL; | |
77 | } | |
78 | } | |
79 | if (thread_in_trace) { | |
80 | return mutex_trylock(mutex); | |
81 | } | |
82 | ||
83 | thread_in_trace = 1; | |
84 | retval = mutex_trylock(mutex); | |
35176231 | 85 | tracepoint(lttng_ust_pthread, pthread_mutex_trylock, mutex, |
171fcc6f | 86 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
87 | thread_in_trace = 0; |
88 | return retval; | |
89 | } | |
90 | ||
91 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
92 | { | |
93 | static int (*mutex_unlock)(pthread_mutex_t *); | |
94 | int retval; | |
95 | ||
96 | if (!mutex_unlock) { | |
97 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
98 | if (!mutex_unlock) { | |
99 | if (thread_in_trace) { | |
100 | abort(); | |
101 | } | |
102 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
103 | return EINVAL; | |
104 | } | |
105 | } | |
106 | if (thread_in_trace) { | |
107 | return mutex_unlock(mutex); | |
108 | } | |
109 | ||
110 | thread_in_trace = 1; | |
111 | retval = mutex_unlock(mutex); | |
35176231 | 112 | tracepoint(lttng_ust_pthread, pthread_mutex_unlock, mutex, |
171fcc6f | 113 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
114 | thread_in_trace = 0; |
115 | return retval; | |
116 | } |