projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| 600f634a | 1 | /* |
| c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-or-later |
| 600f634a | 3 | * |
| c0c0989a | 4 | * Copyright (C) 2013 Mentor Graphics |
| 600f634a SS |
5 | */ |
| 6 | ||
| d7e89462 MD |
7 | /* |
| 8 | * Do _not_ define _LGPL_SOURCE because we don't want to create a | |
| 9 | * circular dependency loop between this malloc wrapper, liburcu and | |
| 10 | * libc. | |
| 11 | */ | |
| 9d315d6d MJ |
12 | |
| 13 | /* Has to be included first to override dlfcn.h */ | |
| 14 | #include <common/compat/dlfcn.h> | |
| 15 | ||
| 16 | #include "common/macros.h" | |
| 600f634a SS |
17 | #include <pthread.h> |
| 18 | ||
| 6ba0c2b2 MD |
19 | #define LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION |
| 20 | #define LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION | |
| 21 | ||
| 88c7c4ea | 22 | #define LTTNG_UST_TRACEPOINT_DEFINE |
| 660323e6 | 23 | #define LTTNG_UST_TRACEPOINT_CREATE_PROBES |
| c28c4a88 | 24 | #define LTTNG_UST_TP_IP_PARAM ip |
| 600f634a SS |
25 | #include "ust_pthread.h" |
| 26 | ||
| 16adecf1 | 27 | static __thread int thread_in_trace; |
| 600f634a SS |
28 | |
| 29 | int pthread_mutex_lock(pthread_mutex_t *mutex) | |
| 30 | { | |
| 31 | static int (*mutex_lock)(pthread_mutex_t *); | |
| 32 | int retval; | |
| 33 | ||
| 34 | if (!mutex_lock) { | |
| 35 | mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock"); | |
| 36 | if (!mutex_lock) { | |
| 37 | if (thread_in_trace) { | |
| 38 | abort(); | |
| 39 | } | |
| 40 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
| 41 | return EINVAL; | |
| 42 | } | |
| 43 | } | |
| 44 | if (thread_in_trace) { | |
| 45 | return mutex_lock(mutex); | |
| 46 | } | |
| 47 | ||
| 48 | thread_in_trace = 1; | |
| cbc06a3b | 49 | lttng_ust_tracepoint(lttng_ust_pthread, pthread_mutex_lock_req, mutex, |
| 171fcc6f | 50 | LTTNG_UST_CALLER_IP()); |
| 600f634a | 51 | retval = mutex_lock(mutex); |
| cbc06a3b | 52 | lttng_ust_tracepoint(lttng_ust_pthread, pthread_mutex_lock_acq, mutex, |
| 171fcc6f | 53 | retval, LTTNG_UST_CALLER_IP()); |
| 600f634a SS |
54 | thread_in_trace = 0; |
| 55 | return retval; | |
| 56 | } | |
| 57 | ||
| 58 | int pthread_mutex_trylock(pthread_mutex_t *mutex) | |
| 59 | { | |
| 60 | static int (*mutex_trylock)(pthread_mutex_t *); | |
| 61 | int retval; | |
| 62 | ||
| 63 | if (!mutex_trylock) { | |
| 64 | mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock"); | |
| 65 | if (!mutex_trylock) { | |
| 66 | if (thread_in_trace) { | |
| 67 | abort(); | |
| 68 | } | |
| 69 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
| 70 | return EINVAL; | |
| 71 | } | |
| 72 | } | |
| 73 | if (thread_in_trace) { | |
| 74 | return mutex_trylock(mutex); | |
| 75 | } | |
| 76 | ||
| 77 | thread_in_trace = 1; | |
| 78 | retval = mutex_trylock(mutex); | |
| cbc06a3b | 79 | lttng_ust_tracepoint(lttng_ust_pthread, pthread_mutex_trylock, mutex, |
| 171fcc6f | 80 | retval, LTTNG_UST_CALLER_IP()); |
| 600f634a SS |
81 | thread_in_trace = 0; |
| 82 | return retval; | |
| 83 | } | |
| 84 | ||
| 85 | int pthread_mutex_unlock(pthread_mutex_t *mutex) | |
| 86 | { | |
| 87 | static int (*mutex_unlock)(pthread_mutex_t *); | |
| 88 | int retval; | |
| 89 | ||
| 90 | if (!mutex_unlock) { | |
| 91 | mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock"); | |
| 92 | if (!mutex_unlock) { | |
| 93 | if (thread_in_trace) { | |
| 94 | abort(); | |
| 95 | } | |
| 96 | fprintf(stderr, "unable to initialize pthread wrapper library.\n"); | |
| 97 | return EINVAL; | |
| 98 | } | |
| 99 | } | |
| 100 | if (thread_in_trace) { | |
| 101 | return mutex_unlock(mutex); | |
| 102 | } | |
| 103 | ||
| 104 | thread_in_trace = 1; | |
| 105 | retval = mutex_unlock(mutex); | |
| cbc06a3b | 106 | lttng_ust_tracepoint(lttng_ust_pthread, pthread_mutex_unlock, mutex, |
| 171fcc6f | 107 | retval, LTTNG_UST_CALLER_IP()); |
| 600f634a SS |
108 | thread_in_trace = 0; |
| 109 | return retval; | |
| 110 | } |