Commit | Line | Data |
---|---|---|
b728d87e MD |
1 | #ifndef _UST_COMPAT_H |
2 | #define _UST_COMPAT_H | |
3 | ||
4 | /* | |
e92f3e28 | 5 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
01f0e40c | 6 | * Copyright (C) 2016 Raphaël Beamonte <raphael.beamonte@gmail.com> |
0db3d6ee | 7 | * Copyright (C) 2020 Michael Jeanson <mjeanson@efficios.com> |
b728d87e | 8 | * |
e92f3e28 MD |
9 | * This library is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; only | |
12 | * version 2.1 of the License. | |
b728d87e | 13 | * |
e92f3e28 MD |
14 | * This library is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
b728d87e MD |
22 | */ |
23 | ||
d9c56a93 | 24 | #include <pthread.h> |
0db3d6ee | 25 | #include <errno.h> |
f2db7517 | 26 | #include <string.h> |
d9c56a93 | 27 | |
0db3d6ee | 28 | #include <lttng/ust-abi.h> |
08114193 | 29 | |
d9c56a93 | 30 | #define LTTNG_UST_PROCNAME_SUFFIX "-ust" |
08114193 | 31 | |
08114193 | 32 | |
d9c56a93 | 33 | #if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID) |
08114193 | 34 | static inline |
d9c56a93 | 35 | int lttng_pthread_setname_np(const char *name) |
08114193 | 36 | { |
bebc0c82 MJ |
37 | /* |
38 | * Some implementations don't error out, replicate this behavior for | |
39 | * consistency. | |
40 | */ | |
41 | if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) { | |
42 | return ERANGE; | |
43 | } | |
44 | ||
0db3d6ee | 45 | return pthread_setname_np(pthread_self(), name); |
08114193 MD |
46 | } |
47 | ||
01f0e40c | 48 | static inline |
d9c56a93 | 49 | int lttng_pthread_getname_np(char *name, size_t len) |
01f0e40c | 50 | { |
0db3d6ee | 51 | return pthread_getname_np(pthread_self(), name, len); |
01f0e40c | 52 | } |
d9c56a93 | 53 | #elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID) |
e4486ebc | 54 | static inline |
d9c56a93 | 55 | int lttng_pthread_setname_np(const char *name) |
e4486ebc | 56 | { |
0db3d6ee | 57 | return pthread_setname_np(name); |
e4486ebc | 58 | } |
08114193 | 59 | |
d9c56a93 MJ |
60 | static inline |
61 | int lttng_pthread_getname_np(char *name, size_t len) | |
62 | { | |
0db3d6ee | 63 | return pthread_getname_np(name, len); |
d9c56a93 | 64 | } |
0db3d6ee MJ |
65 | #elif defined(HAVE_PTHREAD_SET_NAME_NP_WITH_TID) |
66 | ||
67 | #include <pthread_np.h> | |
01f0e40c | 68 | static inline |
d9c56a93 | 69 | int lttng_pthread_setname_np(const char *name) |
01f0e40c | 70 | { |
f2db7517 MJ |
71 | /* Replicate pthread_setname_np's behavior */ |
72 | if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) { | |
73 | return ERANGE; | |
74 | } | |
75 | ||
0db3d6ee MJ |
76 | pthread_set_name_np(pthread_self(), name); |
77 | return 0; | |
01f0e40c | 78 | } |
01f0e40c | 79 | |
d9c56a93 MJ |
80 | static inline |
81 | int lttng_pthread_getname_np(char *name, size_t len) | |
82 | { | |
0db3d6ee MJ |
83 | pthread_get_name_np(pthread_self(), name, len); |
84 | return 0; | |
85 | } | |
86 | #elif defined(__linux__) | |
87 | ||
88 | /* Fallback on prtctl on Linux */ | |
89 | #include <sys/prctl.h> | |
90 | ||
91 | static inline | |
92 | int lttng_pthread_setname_np(const char *name) | |
93 | { | |
f2db7517 MJ |
94 | /* Replicate pthread_setname_np's behavior */ |
95 | if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) { | |
96 | return ERANGE; | |
97 | } | |
0db3d6ee | 98 | return prctl(PR_SET_NAME, name, 0, 0, 0); |
d9c56a93 | 99 | } |
01f0e40c | 100 | |
d9c56a93 | 101 | static inline |
0db3d6ee | 102 | int lttng_pthread_getname_np(char *name, size_t len) |
d9c56a93 | 103 | { |
0db3d6ee | 104 | return prctl(PR_GET_NAME, name, 0, 0, 0); |
d9c56a93 | 105 | } |
01f0e40c | 106 | |
0db3d6ee MJ |
107 | #else |
108 | #error "Please add pthread name support for your OS." | |
109 | #endif | |
110 | ||
111 | /* | |
112 | * If a pthread setname/set_name function is available, declare | |
113 | * the setustprocname() function that will add '-ust' to the end | |
114 | * of the current process name, while truncating it if needed. | |
115 | */ | |
01f0e40c RB |
116 | static inline |
117 | int lttng_ust_setustprocname(void) | |
118 | { | |
119 | int ret = 0, len; | |
0db3d6ee MJ |
120 | char name[LTTNG_UST_ABI_PROCNAME_LEN]; |
121 | int limit = LTTNG_UST_ABI_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1; | |
122 | ||
123 | /* | |
124 | * Get the current thread name. | |
125 | */ | |
126 | ret = lttng_pthread_getname_np(name, LTTNG_UST_ABI_PROCNAME_LEN); | |
127 | if (ret) { | |
128 | goto error; | |
129 | } | |
01f0e40c RB |
130 | |
131 | len = strlen(name); | |
132 | if (len > limit) { | |
133 | len = limit; | |
134 | } | |
135 | ||
136 | ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX); | |
8db078dc | 137 | if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) { |
01f0e40c RB |
138 | goto error; |
139 | } | |
140 | ||
d9c56a93 | 141 | ret = lttng_pthread_setname_np(name); |
01f0e40c RB |
142 | |
143 | error: | |
144 | return ret; | |
145 | } | |
d9c56a93 | 146 | |
bdcf8d82 MD |
147 | #include <errno.h> |
148 | ||
149 | #ifndef ENODATA | |
150 | #define ENODATA ENOMSG | |
151 | #endif | |
152 | ||
b728d87e | 153 | #endif /* _UST_COMPAT_H */ |