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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 | |
be0ce773 | 25 | #define TP_IP_PARAM ip |
600f634a SS |
26 | #include "ust_pthread.h" |
27 | ||
28 | static __thread int thread_in_trace; | |
29 | ||
30 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
31 | { | |
32 | static int (*mutex_lock)(pthread_mutex_t *); | |
33 | int retval; | |
34 | ||
35 | if (!mutex_lock) { | |
36 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
37 | if (!mutex_lock) { | |
38 | if (thread_in_trace) { | |
39 | abort(); | |
40 | } | |
41 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
42 | return EINVAL; | |
43 | } | |
44 | } | |
45 | if (thread_in_trace) { | |
46 | return mutex_lock(mutex); | |
47 | } | |
48 | ||
49 | thread_in_trace = 1; | |
be0ce773 MD |
50 | tracepoint(ust_pthread, pthread_mutex_lock_req, mutex, |
51 | __builtin_return_address(0)); | |
600f634a | 52 | retval = mutex_lock(mutex); |
be0ce773 MD |
53 | tracepoint(ust_pthread, pthread_mutex_lock_acq, mutex, retval, |
54 | __builtin_return_address(0)); | |
600f634a SS |
55 | thread_in_trace = 0; |
56 | return retval; | |
57 | } | |
58 | ||
59 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
60 | { | |
61 | static int (*mutex_trylock)(pthread_mutex_t *); | |
62 | int retval; | |
63 | ||
64 | if (!mutex_trylock) { | |
65 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
66 | if (!mutex_trylock) { | |
67 | if (thread_in_trace) { | |
68 | abort(); | |
69 | } | |
70 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
71 | return EINVAL; | |
72 | } | |
73 | } | |
74 | if (thread_in_trace) { | |
75 | return mutex_trylock(mutex); | |
76 | } | |
77 | ||
78 | thread_in_trace = 1; | |
79 | retval = mutex_trylock(mutex); | |
be0ce773 MD |
80 | tracepoint(ust_pthread, pthread_mutex_trylock, mutex, retval, |
81 | __builtin_return_address(0)); | |
600f634a SS |
82 | thread_in_trace = 0; |
83 | return retval; | |
84 | } | |
85 | ||
86 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
87 | { | |
88 | static int (*mutex_unlock)(pthread_mutex_t *); | |
89 | int retval; | |
90 | ||
91 | if (!mutex_unlock) { | |
92 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
93 | if (!mutex_unlock) { | |
94 | if (thread_in_trace) { | |
95 | abort(); | |
96 | } | |
97 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
98 | return EINVAL; | |
99 | } | |
100 | } | |
101 | if (thread_in_trace) { | |
102 | return mutex_unlock(mutex); | |
103 | } | |
104 | ||
105 | thread_in_trace = 1; | |
106 | retval = mutex_unlock(mutex); | |
be0ce773 MD |
107 | tracepoint(ust_pthread, pthread_mutex_unlock, mutex, retval, |
108 | __builtin_return_address(0)); | |
600f634a SS |
109 | thread_in_trace = 0; |
110 | return retval; | |
111 | } |