| 1 | /* |
| 2 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 5 | * of this software and associated documentation files (the "Software"), to deal |
| 6 | * in the Software without restriction, including without limitation the rights |
| 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 8 | * copies of the Software, and to permit persons to whom the Software is |
| 9 | * furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 20 | * SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdlib.h> |
| 24 | #include <babeltrace2/logging.h> |
| 25 | #include <babeltrace2/version.h> |
| 26 | |
| 27 | #define BT_LOG_TAG "LIB" |
| 28 | #include "lib/lib-logging.h" |
| 29 | |
| 30 | #ifdef BT_DEV_MODE |
| 31 | /* |
| 32 | * Default log level is FATAL in developer mode because fatal logging is |
| 33 | * our way to communicate an unsatisfied precondition and the details. |
| 34 | */ |
| 35 | # define DEFAULT_LOG_LEVEL BT_LOG_FATAL |
| 36 | #else |
| 37 | /* |
| 38 | * In non-developer mode, use NONE by default: we don't print logging |
| 39 | * statements for any executable which links with the library. The |
| 40 | * executable must call bt_logging_set_global_level() or the |
| 41 | * executable's user must set the BABELTRACE_LOGGING_GLOBAL_LEVEL |
| 42 | * environment variable to enable logging. |
| 43 | */ |
| 44 | # define DEFAULT_LOG_LEVEL BT_LOG_NONE |
| 45 | #endif /* BT_DEV_MODE */ |
| 46 | |
| 47 | int bt_lib_log_level = DEFAULT_LOG_LEVEL; |
| 48 | |
| 49 | enum bt_logging_level bt_logging_get_minimal_level(void) |
| 50 | { |
| 51 | return BT_LOG_LEVEL; |
| 52 | } |
| 53 | |
| 54 | enum bt_logging_level bt_logging_get_global_level(void) |
| 55 | { |
| 56 | return bt_lib_log_level; |
| 57 | } |
| 58 | |
| 59 | void bt_logging_set_global_level(enum bt_logging_level log_level) |
| 60 | { |
| 61 | #ifdef BT_DEV_MODE |
| 62 | /* |
| 63 | * Do not allow the library's log level to fall to NONE when in |
| 64 | * developer mode because fatal logging is our way to |
| 65 | * communicate an unsatisfied precondition and the details. |
| 66 | */ |
| 67 | if (log_level == BT_LOG_NONE) { |
| 68 | log_level = BT_LOG_FATAL; |
| 69 | } |
| 70 | #endif |
| 71 | |
| 72 | bt_lib_log_level = log_level; |
| 73 | } |
| 74 | |
| 75 | static |
| 76 | void __attribute__((constructor)) bt_logging_ctor(void) |
| 77 | { |
| 78 | const char *v_extra = bt_version_get_extra() ? bt_version_get_extra() : |
| 79 | ""; |
| 80 | |
| 81 | bt_logging_set_global_level( |
| 82 | bt_log_get_level_from_env("BABELTRACE_LOGGING_GLOBAL_LEVEL")); |
| 83 | BT_LOGI("Babeltrace %d.%d.%d%s library loaded: " |
| 84 | "major=%d, minor=%d, patch=%d, extra=\"%s\"", |
| 85 | bt_version_get_major(), bt_version_get_minor(), |
| 86 | bt_version_get_patch(), v_extra, |
| 87 | bt_version_get_major(), bt_version_get_minor(), |
| 88 | bt_version_get_patch(), v_extra); |
| 89 | } |