liblttng-ust-java-agent/jni/jul/lttng_ust_jul.c

   1 /*
   2  * SPDX-License-Identifier: LGPL-2.1-only
   3  *
   4  * Copyright (C) 2016 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_jul_LttngJulApi.h"
  11
  12 #define TRACEPOINT_DEFINE
  13 #define TRACEPOINT_CREATE_PROBES
  14 #include "lttng_ust_jul.h"
  15 #include "../common/lttng_ust_context.h"
  16
  17 /*
  18  * Deprecated function from before the context information was passed.
  19  */
  20 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_jul_LttngJulApi_tracepoint(JNIEnv *env,
  21                                                 jobject jobj,
  22                                                 jstring msg,
  23                                                 jstring logger_name,
  24                                                 jstring class_name,
  25                                                 jstring method_name,
  26                                                 jlong millis,
  27                                                 jint log_level,
  28                                                 jint thread_id)
  29 {
  30         jboolean iscopy;
  31         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  32         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  33         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  34         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  35
  36         tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  37                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  38
  39         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  40         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  41         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  42         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  43 }
  44
  45 /*
  46  * Tracepoint used by Java applications using the JUL handler.
  47  */
  48 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_jul_LttngJulApi_tracepointWithContext(JNIEnv *env,
  49                                                 jobject jobj,
  50                                                 jstring msg,
  51                                                 jstring logger_name,
  52                                                 jstring class_name,
  53                                                 jstring method_name,
  54                                                 jlong millis,
  55                                                 jint log_level,
  56                                                 jint thread_id,
  57                                                 jbyteArray context_info_entries,
  58                                                 jbyteArray context_info_strings)
  59 {
  60         jboolean iscopy;
  61         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  62         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  63         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  64         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  65         signed char *context_info_entries_array;
  66         signed char *context_info_strings_array;
  67
  68         /*
  69          * Write these to the TLS variables, so that the UST callbacks in
  70          * lttng_ust_context.c can access them.
  71          */
  72         context_info_entries_array = (*env)->GetByteArrayElements(env, context_info_entries, &iscopy);
  73         lttng_ust_context_info_tls.ctx_entries = (struct lttng_ust_jni_ctx_entry *) context_info_entries_array;
  74         lttng_ust_context_info_tls.ctx_entries_len = (*env)->GetArrayLength(env, context_info_entries);
  75         context_info_strings_array = (*env)->GetByteArrayElements(env, context_info_strings, &iscopy);
  76         lttng_ust_context_info_tls.ctx_strings = context_info_strings_array;
  77         lttng_ust_context_info_tls.ctx_strings_len = (*env)->GetArrayLength(env, context_info_strings);
  78
  79         tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  80                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  81
  82         lttng_ust_context_info_tls.ctx_entries = NULL;
  83         lttng_ust_context_info_tls.ctx_entries_len = 0;
  84         lttng_ust_context_info_tls.ctx_strings = NULL;
  85         lttng_ust_context_info_tls.ctx_strings_len = 0;
  86         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  87         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  88         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  89         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  90         (*env)->ReleaseByteArrayElements(env, context_info_entries, context_info_entries_array, 0);
  91         (*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0);
  92 }