liblttng-ust-java-agent/jni/jul/lttng_ust_jul.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_jul_LttngJulApi.h"
  21
  22 #define TRACEPOINT_DEFINE
  23 #define TRACEPOINT_CREATE_PROBES
  24 #include "lttng_ust_jul.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_jul_LttngJulApi_tracepoint(JNIEnv *env,
  31                                                 jobject jobj,
  32                                                 jstring msg,
  33                                                 jstring logger_name,
  34                                                 jstring class_name,
  35                                                 jstring method_name,
  36                                                 jlong millis,
  37                                                 jint log_level,
  38                                                 jint thread_id)
  39 {
  40         jboolean iscopy;
  41         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  42         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  43         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  44         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  45
  46         tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  47                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  48
  49         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  50         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  51         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  52         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  53 }
  54
  55 /*
  56  * Tracepoint used by Java applications using the JUL handler.
  57  */
  58 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_jul_LttngJulApi_tracepointWithContext(JNIEnv *env,
  59                                                 jobject jobj,
  60                                                 jstring msg,
  61                                                 jstring logger_name,
  62                                                 jstring class_name,
  63                                                 jstring method_name,
  64                                                 jlong millis,
  65                                                 jint log_level,
  66                                                 jint thread_id,
  67                                                 jbyteArray context_info)
  68 {
  69         jboolean iscopy;
  70         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  71         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  72         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  73         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  74         signed char *context_info_array;
  75
  76         /*
  77          * Write these to the TLS variables, so that the UST callbacks in
  78          * lttng_ust_context.c can access them.
  79          */
  80         context_info_array = (*env)->GetByteArrayElements(env, context_info, &iscopy);
  81         lttng_ust_context_info_tls.ctx = (struct lttng_ust_jni_ctx *) context_info_array;
  82         lttng_ust_context_info_tls.len = (*env)->GetArrayLength(env, context_info);
  83
  84         tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  85                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  86
  87         lttng_ust_context_info_tls.ctx = NULL;
  88         lttng_ust_context_info_tls.len = 0;
  89         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  90         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  91         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  92         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  93         (*env)->ReleaseByteArrayElements(env, context_info, context_info_array, 0);
  94 }