X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=liblttng-ust-java-agent%2Fjni%2Flog4j%2Flttng_ust_log4j2.c;fp=liblttng-ust-java-agent%2Fjni%2Flog4j%2Flttng_ust_log4j2.c;h=68616bf4982bec37641516a792ba1f5881d1fa26;hb=6e8e8cb8d7b69e42dbc4c3702f6778d58d4a2371;hp=0000000000000000000000000000000000000000;hpb=2f14557f4175ac05f4ea74ff858be44706118464;p=deliverable%2Flttng-ust.git

diff --git a/liblttng-ust-java-agent/jni/log4j/lttng_ust_log4j2.c b/liblttng-ust-java-agent/jni/log4j/lttng_ust_log4j2.c
new file mode 100644
index 00000000..68616bf4
--- /dev/null
+++ b/liblttng-ust-java-agent/jni/log4j/lttng_ust_log4j2.c
@@ -0,0 +1,129 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ * Copyright (C) 2016-2022 EfficiOS Inc.
+ * Copyright (C) 2016 Alexandre Montplaisir <alexmonthy@efficios.com>
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#define _LGPL_SOURCE
+#include "org_lttng_ust_agent_log4j2_LttngLog4j2Api.h"
+#include "lttng_ust_log4j_tp.h"
+#include "../common/lttng_ust_context.h"
+
+/*
+ * Those are an exact map from the class org.apache.log4j.Level.
+ */
+enum loglevel_log4j1 {
+        LOGLEVEL_LOG4J1_OFF              = INT32_MAX,
+        LOGLEVEL_LOG4J1_FATAL            = 50000,
+        LOGLEVEL_LOG4J1_ERROR            = 40000,
+        LOGLEVEL_LOG4J1_WARN             = 30000,
+        LOGLEVEL_LOG4J1_INFO             = 20000,
+        LOGLEVEL_LOG4J1_DEBUG            = 10000,
+        LOGLEVEL_LOG4J1_TRACE            = 5000,
+        LOGLEVEL_LOG4J1_ALL              = INT32_MIN,
+};
+
+/*
+ * Those are an exact map from the class
+ * org.apache.logging.log4j.spi.StandardLevel.
+ */
+enum loglevel_log4j2 {
+        LOGLEVEL_LOG4J2_OFF              = 0,
+        LOGLEVEL_LOG4J2_FATAL            = 100,
+        LOGLEVEL_LOG4J2_ERROR            = 200,
+        LOGLEVEL_LOG4J2_WARN             = 300,
+        LOGLEVEL_LOG4J2_INFO             = 400,
+        LOGLEVEL_LOG4J2_DEBUG            = 500,
+        LOGLEVEL_LOG4J2_TRACE            = 600,
+        LOGLEVEL_LOG4J2_ALL              = INT32_MAX,
+};
+
+/*
+ * The integer values of the loglevels has obviously changed in log4j2,
+ * translate them to the values of log4j1 since they are exposed in the API of
+ * lttng-tools.
+ *
+ * Custom loglevels might pose a problem when using ranges.
+ */
+static jint loglevel_2x_to_1x(jint loglevel)
+{
+	switch (loglevel) {
+	case LOGLEVEL_LOG4J2_OFF:
+		return LOGLEVEL_LOG4J1_OFF;
+	case LOGLEVEL_LOG4J2_FATAL:
+		return LOGLEVEL_LOG4J1_FATAL;
+	case LOGLEVEL_LOG4J2_ERROR:
+		return LOGLEVEL_LOG4J1_ERROR;
+	case LOGLEVEL_LOG4J2_WARN:
+		return LOGLEVEL_LOG4J1_WARN;
+	case LOGLEVEL_LOG4J2_INFO:
+		return LOGLEVEL_LOG4J1_INFO;
+	case LOGLEVEL_LOG4J2_DEBUG:
+		return LOGLEVEL_LOG4J1_DEBUG;
+	case LOGLEVEL_LOG4J2_TRACE:
+		return LOGLEVEL_LOG4J1_TRACE;
+	case LOGLEVEL_LOG4J2_ALL:
+		return LOGLEVEL_LOG4J1_ALL;
+	default:
+		/* Handle custom loglevels. */
+		return loglevel;
+	}
+}
+
+/*
+ * Tracepoint used by Java applications using the log4j 2.x handler.
+ */
+JNIEXPORT void JNICALL Java_org_lttng_ust_agent_log4j2_LttngLog4j2Api_tracepointWithContext(JNIEnv *env,
+						jobject jobj __attribute__((unused)),
+						jstring message,
+						jstring loggerName,
+						jstring className,
+						jstring methodName,
+						jstring fileName,
+						jint lineNumber,
+						jlong timeStamp,
+						jint logLevel,
+						jstring threadName,
+						jbyteArray context_info_entries,
+						jbyteArray context_info_strings)
+{
+	jboolean iscopy;
+	const char *msg_cstr = (*env)->GetStringUTFChars(env, message, &iscopy);
+	const char *logger_name_cstr = (*env)->GetStringUTFChars(env, loggerName, &iscopy);
+	const char *class_name_cstr = (*env)->GetStringUTFChars(env, className, &iscopy);
+	const char *method_name_cstr = (*env)->GetStringUTFChars(env, methodName, &iscopy);
+	const char *file_name_cstr = (*env)->GetStringUTFChars(env, fileName, &iscopy);
+	const char *thread_name_cstr = (*env)->GetStringUTFChars(env, threadName, &iscopy);
+	signed char *context_info_entries_array;
+	signed char *context_info_strings_array;
+
+	/*
+	 * Write these to the TLS variables, so that the UST callbacks in
+	 * lttng_ust_context.c can access them.
+	 */
+	context_info_entries_array = (*env)->GetByteArrayElements(env, context_info_entries, &iscopy);
+	lttng_ust_context_info_tls.ctx_entries = (struct lttng_ust_jni_ctx_entry *) context_info_entries_array;
+	lttng_ust_context_info_tls.ctx_entries_len = (*env)->GetArrayLength(env, context_info_entries);
+	context_info_strings_array = (*env)->GetByteArrayElements(env, context_info_strings, &iscopy);
+	lttng_ust_context_info_tls.ctx_strings = context_info_strings_array;
+	lttng_ust_context_info_tls.ctx_strings_len = (*env)->GetArrayLength(env, context_info_strings);
+
+	tracepoint(lttng_log4j, event, msg_cstr, logger_name_cstr,
+		   class_name_cstr, method_name_cstr, file_name_cstr,
+		   lineNumber, timeStamp, loglevel_2x_to_1x(logLevel), thread_name_cstr);
+
+	lttng_ust_context_info_tls.ctx_entries = NULL;
+	lttng_ust_context_info_tls.ctx_entries_len = 0;
+	lttng_ust_context_info_tls.ctx_strings = NULL;
+	lttng_ust_context_info_tls.ctx_strings_len = 0;
+	(*env)->ReleaseStringUTFChars(env, message, msg_cstr);
+	(*env)->ReleaseStringUTFChars(env, loggerName, logger_name_cstr);
+	(*env)->ReleaseStringUTFChars(env, className, class_name_cstr);
+	(*env)->ReleaseStringUTFChars(env, methodName, method_name_cstr);
+	(*env)->ReleaseStringUTFChars(env, fileName, file_name_cstr);
+	(*env)->ReleaseStringUTFChars(env, threadName, thread_name_cstr);
+	(*env)->ReleaseByteArrayElements(env, context_info_entries, context_info_entries_array, 0);
+	(*env)->ReleaseByteArrayElements(env, context_info_strings, context_info_strings_array, 0);
+}