| 1 | /* |
| 2 | * SPDX-License-Identifier: LGPL-2.1-only |
| 3 | * |
| 4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | * Copyright (C) 2016 Raphaƫl Beamonte <raphael.beamonte@gmail.com> |
| 6 | * Copyright (C) 2020 Michael Jeanson <mjeanson@efficios.com> |
| 7 | */ |
| 8 | |
| 9 | #ifndef _UST_COMMON_PROCNAME_H |
| 10 | #define _UST_COMMON_PROCNAME_H |
| 11 | |
| 12 | #include <string.h> |
| 13 | #include <lttng/ust-abi.h> |
| 14 | |
| 15 | #include "common/compat/pthread.h" |
| 16 | |
| 17 | #define LTTNG_UST_PROCNAME_SUFFIX "-ust" |
| 18 | |
| 19 | /* |
| 20 | * If a pthread setname/set_name function is available, declare |
| 21 | * the setustprocname() function that will add '-ust' to the end |
| 22 | * of the current process name, while truncating it if needed. |
| 23 | */ |
| 24 | static inline |
| 25 | int lttng_ust_setustprocname(void) |
| 26 | { |
| 27 | int ret = 0, len; |
| 28 | char name[LTTNG_UST_ABI_PROCNAME_LEN]; |
| 29 | int limit = LTTNG_UST_ABI_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1; |
| 30 | |
| 31 | /* |
| 32 | * Get the current thread name. |
| 33 | */ |
| 34 | ret = lttng_pthread_getname_np(name, LTTNG_UST_ABI_PROCNAME_LEN); |
| 35 | if (ret) { |
| 36 | goto error; |
| 37 | } |
| 38 | |
| 39 | len = strlen(name); |
| 40 | if (len > limit) { |
| 41 | len = limit; |
| 42 | } |
| 43 | |
| 44 | ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX); |
| 45 | if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) { |
| 46 | goto error; |
| 47 | } |
| 48 | |
| 49 | ret = lttng_pthread_setname_np(name); |
| 50 | |
| 51 | error: |
| 52 | return ret; |
| 53 | } |
| 54 | |
| 55 | #endif /* _UST_COMMON_PROCNAME_H */ |