| 1 | /* |
| 2 | * SPDX-License-Identifier: LGPL-2.1-only |
| 3 | * |
| 4 | * Copyright (C) 2016-2022 EfficiOS Inc. |
| 5 | * Copyright (C) 2016 Alexandre Montplaisir <alexmonthy@efficios.com> |
| 6 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | */ |
| 8 | |
| 9 | #define _LGPL_SOURCE |
| 10 | #include "org_lttng_ust_agent_log4j2_LttngLog4j2Api.h" |
| 11 | #include "lttng_ust_log4j_tp.h" |
| 12 | #include "../common/lttng_ust_context.h" |
| 13 | |
| 14 | /* |
| 15 | * Those are an exact map from the class org.apache.log4j.Level. |
| 16 | */ |
| 17 | enum loglevel_log4j1 { |
| 18 | LOGLEVEL_LOG4J1_OFF = INT32_MAX, |
| 19 | LOGLEVEL_LOG4J1_FATAL = 50000, |
| 20 | LOGLEVEL_LOG4J1_ERROR = 40000, |
| 21 | LOGLEVEL_LOG4J1_WARN = 30000, |
| 22 | LOGLEVEL_LOG4J1_INFO = 20000, |
| 23 | LOGLEVEL_LOG4J1_DEBUG = 10000, |
| 24 | LOGLEVEL_LOG4J1_TRACE = 5000, |
| 25 | LOGLEVEL_LOG4J1_ALL = INT32_MIN, |
| 26 | }; |
| 27 | |
| 28 | /* |
| 29 | * Those are an exact map from the class |
| 30 | * org.apache.logging.log4j.spi.StandardLevel. |
| 31 | */ |
| 32 | enum loglevel_log4j2 { |
| 33 | LOGLEVEL_LOG4J2_OFF = 0, |
| 34 | LOGLEVEL_LOG4J2_FATAL = 100, |
| 35 | LOGLEVEL_LOG4J2_ERROR = 200, |
| 36 | LOGLEVEL_LOG4J2_WARN = 300, |
| 37 | LOGLEVEL_LOG4J2_INFO = 400, |
| 38 | LOGLEVEL_LOG4J2_DEBUG = 500, |
| 39 | LOGLEVEL_LOG4J2_TRACE = 600, |
| 40 | LOGLEVEL_LOG4J2_ALL = INT32_MAX, |
| 41 | }; |
| 42 | |
| 43 | /* |
| 44 | * The integer values of the loglevels has obviously changed in log4j2, |
| 45 | * translate them to the values of log4j1 since they are exposed in the API of |
| 46 | * lttng-tools. |
| 47 | * |
| 48 | * Custom loglevels might pose a problem when using ranges. |
| 49 | */ |
| 50 | static jint loglevel_2x_to_1x(jint loglevel) |
| 51 | { |
| 52 | switch (loglevel) { |
| 53 | case LOGLEVEL_LOG4J2_OFF: |
| 54 | return LOGLEVEL_LOG4J1_OFF; |
| 55 | case LOGLEVEL_LOG4J2_FATAL: |
| 56 | return LOGLEVEL_LOG4J1_FATAL; |
| 57 | case LOGLEVEL_LOG4J2_ERROR: |
| 58 | return LOGLEVEL_LOG4J1_ERROR; |
| 59 | case LOGLEVEL_LOG4J2_WARN: |
| 60 | return LOGLEVEL_LOG4J1_WARN; |
| 61 | case LOGLEVEL_LOG4J2_INFO: |
| 62 | return LOGLEVEL_LOG4J1_INFO; |
| 63 | case LOGLEVEL_LOG4J2_DEBUG: |
| 64 | return LOGLEVEL_LOG4J1_DEBUG; |
| 65 | case LOGLEVEL_LOG4J2_TRACE: |
| 66 | return LOGLEVEL_LOG4J1_TRACE; |
| 67 | case LOGLEVEL_LOG4J2_ALL: |
| 68 | return LOGLEVEL_LOG4J1_ALL; |
| 69 | default: |
| 70 | /* Handle custom loglevels. */ |
| 71 | return loglevel; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * Tracepoint used by Java applications using the log4j 2.x handler. |
| 77 | */ |
| 78 | JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j2_LttngLog4j2Api_tracepointWithContext(JNIEnv *env, |
| 79 | jobject jobj __attribute__((unused)), |
| 80 | jstring message, |
| 81 | jstring loggerName, |
| 82 | jstring className, |
| 83 | jstring methodName, |
| 84 | jstring fileName, |
| 85 | jint lineNumber, |
| 86 | jlong timeStamp, |
| 87 | jint logLevel, |
| 88 | jstring threadName, |
| 89 | jbyteArray context_info_entries, |
| 90 | jbyteArray context_info_strings) |
| 91 | { |
| 92 | jboolean iscopy; |
| 93 | const char *msg_cstr = (*env)->GetStringUTFChars(env, message, &iscopy); |
| 94 | const char *logger_name_cstr = (*env)->GetStringUTFChars(env, loggerName, &iscopy); |
| 95 | const char *class_name_cstr = (*env)->GetStringUTFChars(env, className, &iscopy); |
| 96 | const char *method_name_cstr = (*env)->GetStringUTFChars(env, methodName, &iscopy); |
| 97 | const char *file_name_cstr = (*env)->GetStringUTFChars(env, fileName, &iscopy); |
| 98 | const char *thread_name_cstr = (*env)->GetStringUTFChars(env, threadName, &iscopy); |
| 99 | signed char *context_info_entries_array; |
| 100 | signed char *context_info_strings_array; |
| 101 | |
| 102 | /* |
| 103 | * Write these to the TLS variables, so that the UST callbacks in |
| 104 | * lttng_ust_context.c can access them. |
| 105 | */ |
| 106 | context_info_entries_array = (*env)->GetByteArrayElements(env, context_info_entries, &iscopy); |
| 107 | lttng_ust_context_info_tls.ctx_entries = (struct lttng_ust_jni_ctx_entry *) context_info_entries_array; |
| 108 | lttng_ust_context_info_tls.ctx_entries_len = (*env)->GetArrayLength(env, context_info_entries); |
| 109 | context_info_strings_array = (*env)->GetByteArrayElements(env, context_info_strings, &iscopy); |
| 110 | lttng_ust_context_info_tls.ctx_strings = context_info_strings_array; |
| 111 | lttng_ust_context_info_tls.ctx_strings_len = (*env)->GetArrayLength(env, context_info_strings); |
| 112 | |
| 113 | lttng_ust_tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr, |
| 114 | class_name_cstr, method_name_cstr, file_name_cstr, |
| 115 | lineNumber, timeStamp, loglevel_2x_to_1x(logLevel), thread_name_cstr); |
| 116 | |
| 117 | lttng_ust_context_info_tls.ctx_entries = NULL; |
| 118 | lttng_ust_context_info_tls.ctx_entries_len = 0; |
| 119 | lttng_ust_context_info_tls.ctx_strings = NULL; |
| 120 | lttng_ust_context_info_tls.ctx_strings_len = 0; |
| 121 | (*env)->ReleaseStringUTFChars(env, message, msg_cstr); |
| 122 | (*env)->ReleaseStringUTFChars(env, loggerName, logger_name_cstr); |
| 123 | (*env)->ReleaseStringUTFChars(env, className, class_name_cstr); |
| 124 | (*env)->ReleaseStringUTFChars(env, methodName, method_name_cstr); |
| 125 | (*env)->ReleaseStringUTFChars(env, fileName, file_name_cstr); |
| 126 | (*env)->ReleaseStringUTFChars(env, threadName, thread_name_cstr); |
| 127 | (*env)->ReleaseByteArrayElements(env, context_info_entries, context_info_entries_array, 0); |
| 128 | (*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0); |
| 129 | } |