1 files changed, 140 insertions, 0 deletions
diff --git a/fluent-bit/src/multiline/flb_ml_parser_go.c b/fluent-bit/src/multiline/flb_ml_parser_go.c
new file mode 100644
index 00000000..f1cd5407
--- /dev/null
+++ b/fluent-bit/src/multiline/flb_ml_parser_go.c
@@ -0,0 +1,140 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2022 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include <fluent-bit/flb_info.h>
+#include <fluent-bit/multiline/flb_ml.h>
+#include <fluent-bit/multiline/flb_ml_rule.h>
+#include <fluent-bit/multiline/flb_ml_parser.h>
+
+#define rule flb_ml_rule_create
+
+static void rule_error(struct flb_ml_parser *mlp)
+{
+    int id;
+
+    id = mk_list_size(&mlp->regex_rules);
+    flb_error("[multiline: go] rule #%i could not be created", id);
+    flb_ml_parser_destroy(mlp);
+}
+
+/* Go mode */
+struct flb_ml_parser *flb_ml_parser_go(struct flb_config *config, char *key)
+{
+    int ret;
+    struct flb_ml_parser *mlp;
+
+    mlp = flb_ml_parser_create(config,               /* Fluent Bit context */
+                               "go",                 /* name      */
+                               FLB_ML_REGEX,         /* type      */
+                               NULL,                 /* match_str */
+                               FLB_FALSE,            /* negate    */
+                               FLB_ML_FLUSH_TIMEOUT, /* flush_ms  */
+                               key,                  /* key_content */
+                               NULL,                 /* key_group   */
+                               NULL,                 /* key_pattern */
+                               NULL,                 /* parser ctx  */
+                               NULL);                /* parser name */
+
+    if (!mlp) {
+        flb_error("[multiline] could not create 'go mode'");
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "start_state",
+               "/\\bpanic: /",
+               "go_after_panic", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "start_state",
+               "/http: panic serving/",
+               "go_goroutine", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "go_after_panic",
+               "/^$/",
+               "go_goroutine", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "go_after_panic, go_after_signal, go_frame_1",
+               "/^$/",
+               "go_goroutine", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "go_after_panic",
+               "/^\\[signal /",
+               "go_after_signal", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "go_goroutine",
+               "/^goroutine \\d+ \\[[^\\]]+\\]:$/",
+               "go_frame_1", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "go_frame_1",
+               "/^(?:[^\\s.:]+\\.)*[^\\s.():]+\\(|^created by /",
+               "go_frame_2", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    ret = rule(mlp,
+               "go_frame_2",
+               "/^\\s/",
+               "go_frame_1", NULL);
+    if (ret != 0) {
+        rule_error(mlp);
+        return NULL;
+    }
+
+    /* Map the rules (mandatory for regex rules) */
+    ret = flb_ml_parser_init(mlp);
+    if (ret != 0) {
+        flb_error("[multiline: go] error on mapping rules");
+        flb_ml_parser_destroy(mlp);
+        return NULL;
+    }
+
+    return mlp;
+}