From: Ben Gras <ben@minix3.org>
Date: Tue, 7 May 2013 12:36:59 +0000 (+0000)
Subject: libsys: panic hook feature
X-Git-Tag: v3.3.0~994
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=refs%2Fchanges%2F39%2F539%2F2;p=minix.git

libsys: panic hook feature

	. vfs: use it to dump threads stacks

Change-Id: I7ae3521fc153a407505f11049629e6d4142cf7c7
---

diff --git a/lib/libsys/panic.c b/lib/libsys/panic.c
index 79c47bce2..630a17643 100644
--- a/lib/libsys/panic.c
+++ b/lib/libsys/panic.c
@@ -6,6 +6,15 @@
 
 #include "syslib.h"
 
+void panic_hook(void);
+
+__weak_alias(panic_hook, __panic_hook);
+
+void __panic_hook(void)
+{
+	;
+}
+
 /*===========================================================================*
  *				panic				     *
  *===========================================================================*/
@@ -38,6 +47,8 @@ void panic(const char *fmt, ...)
   printf("syslib:panic.c: stacktrace: ");
   util_stacktrace();
 
+  panic_hook();
+
   /* Try exit */
   _exit(1);
 
diff --git a/servers/vfs/misc.c b/servers/vfs/misc.c
index 754bdb0ef..44d9d53b7 100644
--- a/servers/vfs/misc.c
+++ b/servers/vfs/misc.c
@@ -761,3 +761,10 @@ ds_event(void *arg)
   thread_cleanup(NULL);
   return(NULL);
 }
+
+/* A function to be called on panic(). */
+void panic_hook(void)   
+{               
+  printf("VFS mthread stacktraces:\n");
+  mthread_stacktraces(); 
+}