liblttng-ust-java-agent/jni/log4j/lttng_ust_log4j.c

   1 /*
   2  * Copyright (C) 2016 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
   3  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; only
   8  * version 2.1 of the License.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include "org_lttng_ust_agent_log4j_LttngLog4jApi.h"
  21
  22 #define TRACEPOINT_DEFINE
  23 #define TRACEPOINT_CREATE_PROBES
  24 #include "lttng_ust_log4j.h"
  25 #include "../common/lttng_ust_context.h"
  26
  27 /*
  28  * Deprecated function from before the context information was passed.
  29  */
  30 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j_LttngLog4jApi_tracepoint(JNIEnv *env,
  31                                                 jobject jobj,
  32                                                 jstring msg,
  33                                                 jstring logger_name,
  34                                                 jstring class_name,
  35                                                 jstring method_name,
  36                                                 jstring file_name,
  37                                                 jint line_number,
  38                                                 jlong timestamp,
  39                                                 jint loglevel,
  40                                                 jstring thread_name)
  41 {
  42         jboolean iscopy;
  43         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  44         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  45         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  46         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  47         const char *file_name_cstr = (*env)->GetStringUTFChars(env, file_name, &iscopy);
  48         const char *thread_name_cstr = (*env)->GetStringUTFChars(env, thread_name, &iscopy);
  49
  50         tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr,
  51                    class_name_cstr, method_name_cstr, file_name_cstr,
  52                    line_number, timestamp, loglevel, thread_name_cstr);
  53
  54         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  55         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  56         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  57         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  58         (*env)->ReleaseStringUTFChars(env, file_name, file_name_cstr);
  59         (*env)->ReleaseStringUTFChars(env, thread_name, thread_name_cstr);
  60 }
  61
  62 /*
  63  * Tracepoint used by Java applications using the log4j handler.
  64  */
  65 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j_LttngLog4jApi_tracepointWithContext(JNIEnv *env,
  66                                                 jobject jobj,
  67                                                 jstring msg,
  68                                                 jstring logger_name,
  69                                                 jstring class_name,
  70                                                 jstring method_name,
  71                                                 jstring file_name,
  72                                                 jint line_number,
  73                                                 jlong timestamp,
  74                                                 jint loglevel,
  75                                                 jstring thread_name,
  76                                                 jbyteArray context_info)
  77 {
  78         jboolean iscopy;
  79         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  80         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  81         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  82         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  83         const char *file_name_cstr = (*env)->GetStringUTFChars(env, file_name, &iscopy);
  84         const char *thread_name_cstr = (*env)->GetStringUTFChars(env, thread_name, &iscopy);
  85         signed char *context_info_array;
  86
  87         /*
  88          * Write these to the TLS variables, so that the UST callbacks in
  89          * lttng_ust_context.c can access them.
  90          */
  91         context_info_array = (*env)->GetByteArrayElements(env, context_info, &iscopy);
  92         lttng_ust_context_info_tls.ctx = (struct lttng_ust_jni_ctx *) context_info_array;
  93         lttng_ust_context_info_tls.len = (*env)->GetArrayLength(env, context_info);
  94
  95         tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr,
  96                    class_name_cstr, method_name_cstr, file_name_cstr,
  97                    line_number, timestamp, loglevel, thread_name_cstr);
  98
  99         lttng_ust_context_info_tls.ctx = NULL;
 100         lttng_ust_context_info_tls.len = 0;
 101         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
 102         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
 103         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
 104         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
 105         (*env)->ReleaseStringUTFChars(env, file_name, file_name_cstr);
 106         (*env)->ReleaseStringUTFChars(env, thread_name, thread_name_cstr);
 107         (*env)->ReleaseByteArrayElements(env, context_info, context_info_array, 0);
 108 }