liblttng-ust-java-agent/jni/log4j/lttng_ust_log4j.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_log4j_LttngLog4jApi.h"
  11
  12 #define TRACEPOINT_DEFINE
  13 #define TRACEPOINT_CREATE_PROBES
  14 #include "lttng_ust_log4j.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_log4j_LttngLog4jApi_tracepoint(JNIEnv *env,
  21                                                 jobject jobj,
  22                                                 jstring msg,
  23                                                 jstring logger_name,
  24                                                 jstring class_name,
  25                                                 jstring method_name,
  26                                                 jstring file_name,
  27                                                 jint line_number,
  28                                                 jlong timestamp,
  29                                                 jint loglevel,
  30                                                 jstring thread_name)
  31 {
  32         jboolean iscopy;
  33         const char *msg_cstr = (*env)->GetStringUTFChars(env, msg, &iscopy);
  34         const char *logger_name_cstr = (*env)->GetStringUTFChars(env, logger_name, &iscopy);
  35         const char *class_name_cstr = (*env)->GetStringUTFChars(env, class_name, &iscopy);
  36         const char *method_name_cstr = (*env)->GetStringUTFChars(env, method_name, &iscopy);
  37         const char *file_name_cstr = (*env)->GetStringUTFChars(env, file_name, &iscopy);
  38         const char *thread_name_cstr = (*env)->GetStringUTFChars(env, thread_name, &iscopy);
  39
  40         tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr,
  41                    class_name_cstr, method_name_cstr, file_name_cstr,
  42                    line_number, timestamp, loglevel, thread_name_cstr);
  43
  44         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  45         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
  46         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
  47         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
  48         (*env)->ReleaseStringUTFChars(env, file_name, file_name_cstr);
  49         (*env)->ReleaseStringUTFChars(env, thread_name, thread_name_cstr);
  50 }
  51
  52 /*
  53  * Tracepoint used by Java applications using the log4j handler.
  54  */
  55 JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j_LttngLog4jApi_tracepointWithContext(JNIEnv *env,
  56                                                 jobject jobj,
  57                                                 jstring msg,
  58                                                 jstring logger_name,
  59                                                 jstring class_name,
  60                                                 jstring method_name,
  61                                                 jstring file_name,
  62                                                 jint line_number,
  63                                                 jlong timestamp,
  64                                                 jint loglevel,
  65                                                 jstring thread_name,
  66                                                 jbyteArray context_info_entries,
  67                                                 jbyteArray context_info_strings)
  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         const char *file_name_cstr = (*env)->GetStringUTFChars(env, file_name, &iscopy);
  75         const char *thread_name_cstr = (*env)->GetStringUTFChars(env, thread_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_log4j, event, msg_cstr, logger_name_cstr,
  91                    class_name_cstr, method_name_cstr, file_name_cstr,
  92                    line_number, timestamp, loglevel, thread_name_cstr);
  93
  94         lttng_ust_context_info_tls.ctx_entries = NULL;
  95         lttng_ust_context_info_tls.ctx_entries_len = 0;
  96         lttng_ust_context_info_tls.ctx_strings = NULL;
  97         lttng_ust_context_info_tls.ctx_strings_len = 0;
  98         (*env)->ReleaseStringUTFChars(env, msg, msg_cstr);
  99         (*env)->ReleaseStringUTFChars(env, logger_name, logger_name_cstr);
 100         (*env)->ReleaseStringUTFChars(env, class_name, class_name_cstr);
 101         (*env)->ReleaseStringUTFChars(env, method_name, method_name_cstr);
 102         (*env)->ReleaseStringUTFChars(env, file_name, file_name_cstr);
 103         (*env)->ReleaseStringUTFChars(env, thread_name, thread_name_cstr);
 104         (*env)->ReleaseByteArrayElements(env, context_info_entries, context_info_entries_array, 0);
 105         (*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0);
 106 }