| 1 | /* |
| 2 | * Copyright (C) 2020 Michael Jeanson <mjeanson@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #ifndef _COMPAT_PTHREAD_H |
| 9 | #define _COMPAT_PTHREAD_H |
| 10 | |
| 11 | #include <common/compat/errno.hpp> |
| 12 | |
| 13 | #include <pthread.h> |
| 14 | #include <string.h> |
| 15 | |
| 16 | #ifdef __FreeBSD__ |
| 17 | #include <pthread_np.h> |
| 18 | #endif |
| 19 | |
| 20 | #define LTTNG_PTHREAD_NAMELEN 16 |
| 21 | |
| 22 | #if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID) |
| 23 | static inline int lttng_pthread_setname_np(const char *name) |
| 24 | { |
| 25 | /* |
| 26 | * Some implementations don't error out, replicate this behavior for |
| 27 | * consistency. |
| 28 | */ |
| 29 | if (strnlen(name, LTTNG_PTHREAD_NAMELEN) >= LTTNG_PTHREAD_NAMELEN) { |
| 30 | return ERANGE; |
| 31 | } |
| 32 | |
| 33 | return pthread_setname_np(pthread_self(), name); |
| 34 | } |
| 35 | #elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID) |
| 36 | static inline int lttng_pthread_setname_np(const char *name) |
| 37 | { |
| 38 | return pthread_setname_np(name); |
| 39 | } |
| 40 | #elif defined(HAVE_PTHREAD_SET_NAME_NP_WITH_TID) |
| 41 | |
| 42 | static inline int lttng_pthread_setname_np(const char *name) |
| 43 | { |
| 44 | /* Replicate pthread_setname_np's behavior. */ |
| 45 | if (strnlen(name, LTTNG_PTHREAD_NAMELEN) >= LTTNG_PTHREAD_NAMELEN) { |
| 46 | return ERANGE; |
| 47 | } |
| 48 | |
| 49 | pthread_set_name_np(pthread_self(), name); |
| 50 | return 0; |
| 51 | } |
| 52 | #elif defined(__linux__) |
| 53 | |
| 54 | /* Fallback on prtctl on Linux */ |
| 55 | #include <sys/prctl.h> |
| 56 | |
| 57 | static inline int lttng_pthread_setname_np(const char *name) |
| 58 | { |
| 59 | /* Replicate pthread_setname_np's behavior. */ |
| 60 | if (strnlen(name, LTTNG_PTHREAD_NAMELEN) >= LTTNG_PTHREAD_NAMELEN) { |
| 61 | return ERANGE; |
| 62 | } |
| 63 | return prctl(PR_SET_NAME, name, 0, 0, 0); |
| 64 | } |
| 65 | #else |
| 66 | /* |
| 67 | * For platforms without thread name support, do nothing. |
| 68 | */ |
| 69 | static inline int lttng_pthread_setname_np(const char *name) |
| 70 | { |
| 71 | return -ENOSYS; |
| 72 | } |
| 73 | #endif |
| 74 | |
| 75 | #if defined(HAVE_PTHREAD_GETNAME_NP_WITH_TID) |
| 76 | static inline int lttng_pthread_getname_np(char *name, size_t len) |
| 77 | { |
| 78 | return pthread_getname_np(pthread_self(), name, len); |
| 79 | } |
| 80 | #elif defined(HAVE_PTHREAD_GETNAME_NP_WITHOUT_TID) |
| 81 | static inline int lttng_pthread_getname_np(char *name, size_t len) |
| 82 | { |
| 83 | return pthread_getname_np(name, len); |
| 84 | } |
| 85 | #elif defined(HAVE_PTHREAD_GET_NAME_NP_WITH_TID) |
| 86 | static inline int lttng_pthread_getname_np(char *name, size_t len) |
| 87 | { |
| 88 | pthread_get_name_np(pthread_self(), name, len); |
| 89 | return 0; |
| 90 | } |
| 91 | #elif defined(__linux__) |
| 92 | |
| 93 | /* Fallback on prtctl on Linux */ |
| 94 | #include <sys/prctl.h> |
| 95 | |
| 96 | static inline int lttng_pthread_getname_np(char *name, size_t len) |
| 97 | { |
| 98 | return prctl(PR_GET_NAME, name, 0, 0, 0); |
| 99 | } |
| 100 | #else |
| 101 | /* |
| 102 | * For platforms without thread name support, do nothing. |
| 103 | */ |
| 104 | static inline int lttng_pthread_getname_np(char *name, size_t len) |
| 105 | { |
| 106 | return -ENOSYS; |
| 107 | } |
| 108 | #endif |
| 109 | |
| 110 | #endif /* _COMPAT_PTHREAD_H */ |