Commit | Line | Data |
---|---|---|
b728d87e | 1 | /* |
c0c0989a MJ |
2 | * SPDX-License-Identifier: LGPL-2.1-only |
3 | * | |
e92f3e28 | 4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
01f0e40c | 5 | * Copyright (C) 2016 Raphaël Beamonte <raphael.beamonte@gmail.com> |
0db3d6ee | 6 | * Copyright (C) 2020 Michael Jeanson <mjeanson@efficios.com> |
b728d87e MD |
7 | */ |
8 | ||
c0c0989a MJ |
9 | #ifndef _UST_COMPAT_H |
10 | #define _UST_COMPAT_H | |
11 | ||
d9c56a93 | 12 | #include <pthread.h> |
0db3d6ee | 13 | #include <errno.h> |
f2db7517 | 14 | #include <string.h> |
d9c56a93 | 15 | |
0db3d6ee | 16 | #include <lttng/ust-abi.h> |
08114193 | 17 | |
d9c56a93 | 18 | #define LTTNG_UST_PROCNAME_SUFFIX "-ust" |
08114193 | 19 | |
08114193 | 20 | |
d9c56a93 | 21 | #if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID) |
08114193 | 22 | static inline |
d9c56a93 | 23 | int lttng_pthread_setname_np(const char *name) |
08114193 | 24 | { |
bebc0c82 MJ |
25 | /* |
26 | * Some implementations don't error out, replicate this behavior for | |
27 | * consistency. | |
28 | */ | |
29 | if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) { | |
30 | return ERANGE; | |
31 | } | |
32 | ||
0db3d6ee | 33 | return pthread_setname_np(pthread_self(), name); |
08114193 MD |
34 | } |
35 | ||
01f0e40c | 36 | static inline |
d9c56a93 | 37 | int lttng_pthread_getname_np(char *name, size_t len) |
01f0e40c | 38 | { |
0db3d6ee | 39 | return pthread_getname_np(pthread_self(), name, len); |
01f0e40c | 40 | } |
d9c56a93 | 41 | #elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID) |
e4486ebc | 42 | static inline |
d9c56a93 | 43 | int lttng_pthread_setname_np(const char *name) |
e4486ebc | 44 | { |
0db3d6ee | 45 | return pthread_setname_np(name); |
e4486ebc | 46 | } |
08114193 | 47 | |
d9c56a93 MJ |
48 | static inline |
49 | int lttng_pthread_getname_np(char *name, size_t len) | |
50 | { | |
0db3d6ee | 51 | return pthread_getname_np(name, len); |
d9c56a93 | 52 | } |
0db3d6ee MJ |
53 | #elif defined(HAVE_PTHREAD_SET_NAME_NP_WITH_TID) |
54 | ||
55 | #include <pthread_np.h> | |
01f0e40c | 56 | static inline |
d9c56a93 | 57 | int lttng_pthread_setname_np(const char *name) |
01f0e40c | 58 | { |
f2db7517 MJ |
59 | /* Replicate pthread_setname_np's behavior */ |
60 | if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) { | |
61 | return ERANGE; | |
62 | } | |
63 | ||
0db3d6ee MJ |
64 | pthread_set_name_np(pthread_self(), name); |
65 | return 0; | |
01f0e40c | 66 | } |
01f0e40c | 67 | |
d9c56a93 MJ |
68 | static inline |
69 | int lttng_pthread_getname_np(char *name, size_t len) | |
70 | { | |
0db3d6ee MJ |
71 | pthread_get_name_np(pthread_self(), name, len); |
72 | return 0; | |
73 | } | |
74 | #elif defined(__linux__) | |
75 | ||
76 | /* Fallback on prtctl on Linux */ | |
77 | #include <sys/prctl.h> | |
78 | ||
79 | static inline | |
80 | int lttng_pthread_setname_np(const char *name) | |
81 | { | |
f2db7517 MJ |
82 | /* Replicate pthread_setname_np's behavior */ |
83 | if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) { | |
84 | return ERANGE; | |
85 | } | |
0db3d6ee | 86 | return prctl(PR_SET_NAME, name, 0, 0, 0); |
d9c56a93 | 87 | } |
01f0e40c | 88 | |
d9c56a93 | 89 | static inline |
0db3d6ee | 90 | int lttng_pthread_getname_np(char *name, size_t len) |
d9c56a93 | 91 | { |
0db3d6ee | 92 | return prctl(PR_GET_NAME, name, 0, 0, 0); |
d9c56a93 | 93 | } |
01f0e40c | 94 | |
0db3d6ee MJ |
95 | #else |
96 | #error "Please add pthread name support for your OS." | |
97 | #endif | |
98 | ||
99 | /* | |
100 | * If a pthread setname/set_name function is available, declare | |
101 | * the setustprocname() function that will add '-ust' to the end | |
102 | * of the current process name, while truncating it if needed. | |
103 | */ | |
01f0e40c RB |
104 | static inline |
105 | int lttng_ust_setustprocname(void) | |
106 | { | |
107 | int ret = 0, len; | |
0db3d6ee MJ |
108 | char name[LTTNG_UST_ABI_PROCNAME_LEN]; |
109 | int limit = LTTNG_UST_ABI_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1; | |
110 | ||
111 | /* | |
112 | * Get the current thread name. | |
113 | */ | |
114 | ret = lttng_pthread_getname_np(name, LTTNG_UST_ABI_PROCNAME_LEN); | |
115 | if (ret) { | |
116 | goto error; | |
117 | } | |
01f0e40c RB |
118 | |
119 | len = strlen(name); | |
120 | if (len > limit) { | |
121 | len = limit; | |
122 | } | |
123 | ||
124 | ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX); | |
8db078dc | 125 | if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) { |
01f0e40c RB |
126 | goto error; |
127 | } | |
128 | ||
d9c56a93 | 129 | ret = lttng_pthread_setname_np(name); |
01f0e40c RB |
130 | |
131 | error: | |
132 | return ret; | |
133 | } | |
d9c56a93 | 134 | |
bdcf8d82 MD |
135 | #include <errno.h> |
136 | ||
137 | #ifndef ENODATA | |
138 | #define ENODATA ENOMSG | |
139 | #endif | |
140 | ||
b728d87e | 141 | #endif /* _UST_COMPAT_H */ |