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 #define _LGPL_SOURCE
  21 #include "org_lttng_ust_agent_log4j_LttngLog4jApi.h"
  22
  23 #define TRACEPOINT_DEFINE
  24 #define TRACEPOINT_CREATE_PROBES
  25 #include "lttng_ust_log4j.h"
  26 #include "../common/lttng_ust_context.h"
  27
  28 /*
  29  * Deprecated function from before the context information was passed.
  30  */
  31 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j_LttngLog4jApi_tracepoint(JNIEnv *env,
  32                                                 jobject jobj,
  33                                                 jstring msg,
  34                                                 jstring logger_name,
  35                                                 jstring class_name,
  36                                                 jstring method_name,
  37                                                 jstring file_name,
  38                                                 jint line_number,
  39                                                 jlong timestamp,
  40                                                 jint loglevel,
  41                                                 jstring thread_name)
  42 {
  43         jboolean iscopy;
  44         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  45         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  46         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  47         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  48         const char *file_name_cstr = (*env)->GetStringUTFChars(env, file_name, &iscopy);
  49         const char *thread_name_cstr = (*env)->GetStringUTFChars(env, thread_name, &iscopy);
  50
  51         tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr,
  52                    class_name_cstr, method_name_cstr, file_name_cstr,
  53                    line_number, timestamp, loglevel, thread_name_cstr);
  54
  55         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  56         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  57         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  58         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  59         (*env)->ReleaseStringUTFChars(env, file_name, file_name_cstr);
  60         (*env)->ReleaseStringUTFChars(env, thread_name, thread_name_cstr);
  61 }
  62
  63 /*
  64  * Tracepoint used by Java applications using the log4j handler.
  65  */
  66 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j_LttngLog4jApi_tracepointWithContext(JNIEnv *env,
  67                                                 jobject jobj,
  68                                                 jstring msg,
  69                                                 jstring logger_name,
  70                                                 jstring class_name,
  71                                                 jstring method_name,
  72                                                 jstring file_name,
  73                                                 jint line_number,
  74                                                 jlong timestamp,
  75                                                 jint loglevel,
  76                                                 jstring thread_name,
  77                                                 jbyteArray context_info_entries,
  78                                                 jbyteArray context_info_strings)
  79 {
  80         jboolean iscopy;
  81         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  82         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  83         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  84         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  85         const char *file_name_cstr = (*env)->GetStringUTFChars(env, file_name, &iscopy);
  86         const char *thread_name_cstr = (*env)->GetStringUTFChars(env, thread_name, &iscopy);
  87         signed char *context_info_entries_array;
  88         signed char *context_info_strings_array;
  89
  90         /*
  91          * Write these to the TLS variables, so that the UST callbacks in
  92          * lttng_ust_context.c can access them.
  93          */
  94         context_info_entries_array = (*env)->GetByteArrayElements(env, context_info_entries, &iscopy);
  95         lttng_ust_context_info_tls.ctx_entries = (struct lttng_ust_jni_ctx_entry *) context_info_entries_array;
  96         lttng_ust_context_info_tls.ctx_entries_len = (*env)->GetArrayLength(env, context_info_entries);
  97         context_info_strings_array = (*env)->GetByteArrayElements(env, context_info_strings, &iscopy);
  98         lttng_ust_context_info_tls.ctx_strings = context_info_strings_array;
  99         lttng_ust_context_info_tls.ctx_strings_len = (*env)->GetArrayLength(env, context_info_strings);
 100
 101         tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr,
 102                    class_name_cstr, method_name_cstr, file_name_cstr,
 103                    line_number, timestamp, loglevel, thread_name_cstr);
 104
 105         lttng_ust_context_info_tls.ctx_entries = NULL;
 106         lttng_ust_context_info_tls.ctx_entries_len = 0;
 107         lttng_ust_context_info_tls.ctx_strings = NULL;
 108         lttng_ust_context_info_tls.ctx_strings_len = 0;
 109         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
 110         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
 111         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
 112         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
 113         (*env)->ReleaseStringUTFChars(env, file_name, file_name_cstr);
 114         (*env)->ReleaseStringUTFChars(env, thread_name, thread_name_cstr);
 115         (*env)->ReleaseByteArrayElements(env, context_info_entries, context_info_entries_array, 0);
 116         (*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0);
 117 }