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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 | |
d7e89462 MD |
20 | /* |
21 | * Do _not_ define _LGPL_SOURCE because we don't want to create a | |
22 | * circular dependency loop between this malloc wrapper, liburcu and | |
23 | * libc. | |
24 | */ | |
f02baefb | 25 | #include <lttng/ust-dlfcn.h> |
171fcc6f | 26 | #include <helper.h> |
600f634a SS |
27 | #include <pthread.h> |
28 | ||
29 | #define TRACEPOINT_DEFINE | |
30 | #define TRACEPOINT_CREATE_PROBES | |
35176231 | 31 | #define TP_IP_PARAM ip |
600f634a SS |
32 | #include "ust_pthread.h" |
33 | ||
16adecf1 | 34 | static __thread int thread_in_trace; |
600f634a SS |
35 | |
36 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
37 | { | |
38 | static int (*mutex_lock)(pthread_mutex_t *); | |
39 | int retval; | |
40 | ||
41 | if (!mutex_lock) { | |
42 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
43 | if (!mutex_lock) { | |
44 | if (thread_in_trace) { | |
45 | abort(); | |
46 | } | |
47 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
48 | return EINVAL; | |
49 | } | |
50 | } | |
51 | if (thread_in_trace) { | |
52 | return mutex_lock(mutex); | |
53 | } | |
54 | ||
55 | thread_in_trace = 1; | |
35176231 | 56 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_req, mutex, |
171fcc6f | 57 | LTTNG_UST_CALLER_IP()); |
600f634a | 58 | retval = mutex_lock(mutex); |
35176231 | 59 | tracepoint(lttng_ust_pthread, pthread_mutex_lock_acq, mutex, |
171fcc6f | 60 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
61 | thread_in_trace = 0; |
62 | return retval; | |
63 | } | |
64 | ||
65 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
66 | { | |
67 | static int (*mutex_trylock)(pthread_mutex_t *); | |
68 | int retval; | |
69 | ||
70 | if (!mutex_trylock) { | |
71 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
72 | if (!mutex_trylock) { | |
73 | if (thread_in_trace) { | |
74 | abort(); | |
75 | } | |
76 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
77 | return EINVAL; | |
78 | } | |
79 | } | |
80 | if (thread_in_trace) { | |
81 | return mutex_trylock(mutex); | |
82 | } | |
83 | ||
84 | thread_in_trace = 1; | |
85 | retval = mutex_trylock(mutex); | |
35176231 | 86 | tracepoint(lttng_ust_pthread, pthread_mutex_trylock, mutex, |
171fcc6f | 87 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
88 | thread_in_trace = 0; |
89 | return retval; | |
90 | } | |
91 | ||
92 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
93 | { | |
94 | static int (*mutex_unlock)(pthread_mutex_t *); | |
95 | int retval; | |
96 | ||
97 | if (!mutex_unlock) { | |
98 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
99 | if (!mutex_unlock) { | |
100 | if (thread_in_trace) { | |
101 | abort(); | |
102 | } | |
103 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
104 | return EINVAL; | |
105 | } | |
106 | } | |
107 | if (thread_in_trace) { | |
108 | return mutex_unlock(mutex); | |
109 | } | |
110 | ||
111 | thread_in_trace = 1; | |
112 | retval = mutex_unlock(mutex); | |
35176231 | 113 | tracepoint(lttng_ust_pthread, pthread_mutex_unlock, mutex, |
171fcc6f | 114 | retval, LTTNG_UST_CALLER_IP()); |
600f634a SS |
115 | thread_in_trace = 0; |
116 | return retval; | |
117 | } |