commit 3a761682a65e7e7f7baf172f58b15e567a685387
Author: Willy Tarreau <w@1wt.eu>
Date:   Wed Aug 21 14:12:19 2019 +0200

    MINOR: debug: indicate the applet name when the task is task_run_applet()
    
    This allows to figure what applet is currently being executed (and likely
    hung).
    
    (cherry picked from commit a512b02f67a30ab5519d04f8c8b1263415321c85)
    [wt: backported to improve troubleshooting when the watchdog fires]
    Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/src/debug.c b/src/debug.c
index 3077e97c..36cc9e71 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -90,6 +90,7 @@ void ha_thread_dump(struct buffer *buf, int thr, int calling_tid)
 void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx)
 {
 	const struct stream *s = NULL;
+	const struct appctx __maybe_unused *appctx = NULL;
 
 	if (!task) {
 		chunk_appendf(buf, "0\n");
@@ -110,7 +111,7 @@ void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx)
 		              task->call_date ? " ns ago" : "");
 
 	chunk_appendf(buf, "%s"
-	              "  fct=%p (%s) ctx=%p\n",
+	              "  fct=%p (%s) ctx=%p",
 	              pfx,
 	              task->process,
 	              task->process == process_stream ? "process_stream" :
@@ -119,6 +120,11 @@ void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx)
 		      "?",
 	              task->context);
 
+	if (task->process == task_run_applet && (appctx = task->context))
+		chunk_appendf(buf, "(%s)\n", appctx->applet->name);
+	else
+		chunk_appendf(buf, "\n");
+
 	if (task->process == process_stream && task->context)
 		s = (struct stream *)task->context;
 	else if (task->process == task_run_applet && task->context)