From: Willy Tarreau <w@1wt.eu>
Date: Mon, 20 May 2019 11:48:29 +0000 (+0200)
Subject: MINOR: debug: implement ha_panic()
X-Git-Tag: v2.0-dev4~53
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=56131ca58e3427fbee48db6da381db7daf367774;p=thirdparty%2Fhaproxy.git

MINOR: debug: implement ha_panic()

This function dumps all existing threads using the thread dump mechanism
then aborts. This will be used by the lockup detection and by debugging
tools.
---

diff --git a/include/common/debug.h b/include/common/debug.h
index 4f3baedb79..1038041b1e 100644
--- a/include/common/debug.h
+++ b/include/common/debug.h
@@ -87,6 +87,7 @@ struct buffer;
 void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx);
 void ha_thread_dump(struct buffer *buf, int thr, int calling_tid);
 void ha_thread_dump_all_to_trash();
+void ha_panic();
 
 /* This one is useful to automatically apply poisonning on an area returned
  * by malloc(). Only "p_" is required to make it work, and to define a poison
diff --git a/src/debug.c b/src/debug.c
index fce23c389b..3e38bfa6c2 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -136,6 +136,17 @@ static int cli_io_handler_show_threads(struct appctx *appctx)
 	return 1;
 }
 
+/* dumps a state of all threads into the trash and on fd #2, then aborts. */
+void ha_panic()
+{
+	chunk_reset(&trash);
+	chunk_appendf(&trash, "Thread %u is about to kill the process.\n", tid);
+	ha_thread_dump_all_to_trash();
+	write(2, trash.area, trash.data);
+	for (;;)
+		abort();
+}
+
 #ifndef USE_THREAD_DUMP
 
 /* This function dumps all threads' state to the trash. This version is the