src/lib/lttng-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 LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION
  13 #define LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION
  14
  15 #define LTTNG_UST_TRACEPOINT_DEFINE
  16 #define LTTNG_UST_TRACEPOINT_CREATE_PROBES
  17 #include "lttng_ust_jul.h"
  18 #include "../common/lttng_ust_context.h"
  19
  20 /*
  21  * Deprecated function from before the context information was passed.
  22  */
  23 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_jul_LttngJulApi_tracepoint(JNIEnv *env,
  24                                                 jobject jobj __attribute__((unused)),
  25                                                 jstring msg,
  26                                                 jstring logger_name,
  27                                                 jstring class_name,
  28                                                 jstring method_name,
  29                                                 jlong millis,
  30                                                 jint log_level,
  31                                                 jint thread_id)
  32 {
  33         jboolean iscopy;
  34         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  35         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  36         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  37         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  38
  39         lttng_ust_tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  40                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  41
  42         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  43         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  44         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  45         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  46 }
  47
  48 /*
  49  * Tracepoint used by Java applications using the JUL handler.
  50  */
  51 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_jul_LttngJulApi_tracepointWithContext(JNIEnv *env,
  52                                                 jobject jobj __attribute__((unused)),
  53                                                 jstring msg,
  54                                                 jstring logger_name,
  55                                                 jstring class_name,
  56                                                 jstring method_name,
  57                                                 jlong millis,
  58                                                 jint log_level,
  59                                                 jint thread_id,
  60                                                 jbyteArray context_info_entries,
  61                                                 jbyteArray context_info_strings)
  62 {
  63         jboolean iscopy;
  64         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  65         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  66         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  67         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  68         signed char *context_info_entries_array;
  69         signed char *context_info_strings_array;
  70
  71         /*
  72          * Write these to the TLS variables, so that the UST callbacks in
  73          * lttng_ust_context.c can access them.
  74          */
  75         context_info_entries_array = (*env)->GetByteArrayElements(env, context_info_entries, &iscopy);
  76         lttng_ust_context_info_tls.ctx_entries = (struct lttng_ust_jni_ctx_entry *) context_info_entries_array;
  77         lttng_ust_context_info_tls.ctx_entries_len = (*env)->GetArrayLength(env, context_info_entries);
  78         context_info_strings_array = (*env)->GetByteArrayElements(env, context_info_strings, &iscopy);
  79         lttng_ust_context_info_tls.ctx_strings = context_info_strings_array;
  80         lttng_ust_context_info_tls.ctx_strings_len = (*env)->GetArrayLength(env, context_info_strings);
  81
  82         lttng_ust_tracepoint(lttng_jul, event, msg_cstr, logger_name_cstr,
  83                         class_name_cstr, method_name_cstr, millis, log_level, thread_id);
  84
  85         lttng_ust_context_info_tls.ctx_entries = NULL;
  86         lttng_ust_context_info_tls.ctx_entries_len = 0;
  87         lttng_ust_context_info_tls.ctx_strings = NULL;
  88         lttng_ust_context_info_tls.ctx_strings_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_entries, context_info_entries_array, 0);
  94         (*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0);
  95 }