From edddfbd949a2dc53eb4d3a107d76e7eae6de319e Mon Sep 17 00:00:00 2001
From: Timo Sirainen <timo.sirainen@dovecot.fi>
Date: Mon, 16 Apr 2018 14:00:51 +0300
Subject: [PATCH] lib: Add global core filter, which allows core dumping on
 matching events

---
 src/lib/event-log.c | 28 ++++++++++++++++++++++++++++
 src/lib/event-log.h |  7 +++++++
 2 files changed, 35 insertions(+)

diff --git a/src/lib/event-log.c b/src/lib/event-log.c
index 75b75b6255..7f4074e76d 100644
--- a/src/lib/event-log.c
+++ b/src/lib/event-log.c
@@ -7,6 +7,7 @@
 
 static struct event_filter *global_debug_log_filter = NULL;
 static struct event_filter *global_debug_send_filter = NULL;
+static struct event_filter *global_core_log_filter = NULL;
 
 #undef e_error
 void e_error(struct event *event,
@@ -120,6 +121,10 @@ event_want_debug_log(struct event *event, const char *source_filename,
 	    event_filter_match_source(global_debug_log_filter, event,
 				      source_filename, source_linenum, &ctx))
 		return TRUE;
+	if (global_core_log_filter != NULL &&
+	    event_filter_match_source(global_core_log_filter, event,
+				      source_filename, source_linenum, &ctx))
+		return TRUE;
 	return FALSE;
 }
 
@@ -167,6 +172,11 @@ event_logv_type(struct event *event, enum log_type log_type,
 		str_vprintfa(log_prefix_str, fmt, args);
 		event_send(event, &ctx, "%s", str_c(log_prefix_str));
 	}
+	if (global_core_log_filter != NULL &&
+	    event_filter_match_source(global_core_log_filter, event,
+				      event->source_filename,
+				      event->source_linenum, &ctx))
+		abort();
 	errno = old_errno;
 }
 
@@ -229,3 +239,21 @@ void event_unset_global_debug_send_filter(void)
 	if (global_debug_send_filter != NULL)
 		event_filter_unref(&global_debug_send_filter);
 }
+
+void event_set_global_core_log_filter(struct event_filter *filter)
+{
+	event_unset_global_core_log_filter();
+	global_core_log_filter = filter;
+	event_filter_ref(global_core_log_filter);
+}
+
+struct event_filter *event_get_global_core_log_filter(void)
+{
+	return global_core_log_filter;
+}
+
+void event_unset_global_core_log_filter(void)
+{
+	if (global_core_log_filter != NULL)
+		event_filter_unref(&global_core_log_filter);
+}
diff --git a/src/lib/event-log.h b/src/lib/event-log.h
index 9c8e8558b7..8813e86a88 100644
--- a/src/lib/event-log.h
+++ b/src/lib/event-log.h
@@ -75,4 +75,11 @@ struct event_filter *event_get_global_debug_send_filter(void);
 /* Unset global debug send filter, if one exists. */
 void event_unset_global_debug_send_filter(void);
 
+/* Set/replace the global core filter, which abort()s on matching events. */
+void event_set_global_core_log_filter(struct event_filter *filter);
+/* Return the current global core filter. */
+struct event_filter *event_get_global_core_log_filter(void);
+/* Unset the global core filter, if one exists. */
+void event_unset_global_core_log_filter(void);
+
 #endif