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 #define _LGPL_SOURCE
  21 #include "org_lttng_ust_agent_jul_LttngJulApi.h"
  22
  23 #define TRACEPOINT_DEFINE
  24 #define TRACEPOINT_CREATE_PROBES
  25 #include "lttng_ust_jul.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_jul_LttngJulApi_tracepoint(JNIEnv *env,
  32                                                 jobject jobj,
  33                                                 jstring msg,
  34                                                 jstring logger_name,
  35                                                 jstring class_name,
  36                                                 jstring method_name,
  37                                                 jlong millis,
  38                                                 jint log_level,
  39                                                 jint thread_id)
  40 {
  41         jboolean iscopy;
  42         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  43         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  44         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  45         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  46
  47         tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  48                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  49
  50         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  51         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  52         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  53         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  54 }
  55
  56 /*
  57  * Tracepoint used by Java applications using the JUL handler.
  58  */
  59 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_jul_LttngJulApi_tracepointWithContext(JNIEnv *env,
  60                                                 jobject jobj,
  61                                                 jstring msg,
  62                                                 jstring logger_name,
  63                                                 jstring class_name,
  64                                                 jstring method_name,
  65                                                 jlong millis,
  66                                                 jint log_level,
  67                                                 jint thread_id,
  68                                                 jbyteArray context_info_entries,
  69                                                 jbyteArray context_info_strings)
  70 {
  71         jboolean iscopy;
  72         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  73         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  74         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  75         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  76         signed char *context_info_entries_array;
  77         signed char *context_info_strings_array;
  78
  79         /*
  80          * Write these to the TLS variables, so that the UST callbacks in
  81          * lttng_ust_context.c can access them.
  82          */
  83         context_info_entries_array = (*env)->GetByteArrayElements(env, context_info_entries, &iscopy);
  84         lttng_ust_context_info_tls.ctx_entries = (struct lttng_ust_jni_ctx_entry *) context_info_entries_array;
  85         lttng_ust_context_info_tls.ctx_entries_len = (*env)->GetArrayLength(env, context_info_entries);
  86         context_info_strings_array = (*env)->GetByteArrayElements(env, context_info_strings, &iscopy);
  87         lttng_ust_context_info_tls.ctx_strings = context_info_strings_array;
  88         lttng_ust_context_info_tls.ctx_strings_len = (*env)->GetArrayLength(env, context_info_strings);
  89
  90         tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  91                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  92
  93         lttng_ust_context_info_tls.ctx_entries = NULL;
  94         lttng_ust_context_info_tls.ctx_entries_len = 0;
  95         lttng_ust_context_info_tls.ctx_strings = NULL;
  96         lttng_ust_context_info_tls.ctx_strings_len = 0;
  97         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  98         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  99         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
 100         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
 101         (*env)->ReleaseByteArrayElements(env, context_info_entries, context_info_entries_array, 0);
 102         (*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0);
 103 }