segfault after interrupting hung process with /stoppable=true

[tarkin000]

In the course of debugging, I was running HFC with /stoppable=True.
Hitting enter would shutdown the service, but would hang in the terminal.
Hitting ctl-c causes this:

libev.c:432: Shutdown():        Goodbye.
Stacktrace:


Native stacktrace:

        mono() [0x4accca]
        mono() [0x5040fe]
        mono() [0x4275d7]
        /lib/x86_64-linux-gnu/libpthread.so.0(+0xf0a0) [0x7f3b55cc10a0]
        /lib/x86_64-linux-gnu/libpthread.so.0(pthread_mutex_lock+0x4) [0x7f3b55cbb194]
        /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5(+0x255ee) [0x7f3b5160f5ee]
        /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5(event_base_loop+0x120) [0x7f3b515faf60]
        /usr/lib/libhfc-native.so.1(ProcessLoop+0xd) [0x7f3b51d3245d]
        [0x4032aeaa]

Debug info from gdb:


=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

Aborted

Command line:
mono --debug /usr/local/src/HyperFastCgi/src/HyperFastCgi/4.0/bin/Release/HyperFastCgi.exe /config=/etc/nginx/hyper.config /stoppable=True /printlog=True /loglevels=All

[xplicit]

Can you provide a reproducible case (application and configs), so I can look what is wrong?

[tarkin000]

Reflect.cs (it's a bad name, has nothing to do with reflection)

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using Newtonsoft.Json;
using HyperFastCgi;
using HyperFastCgi.AppHosts.Raw;
using HyperFastCgi.Interfaces;

namespace Reflect {
  public class PeekRequest : BaseRawRequest {
    public override void Process(IWebResponse response) {
      string json;
      if (ServerVariables == null || ServerVariables.Count == 0) {
        json = "null";
      } else {
        json = JsonConvert.SerializeObject(ServerVariables,Formatting.Indented);
      }
      Status = 200;
      StatusDescription = "OK";
      ResponseHeaders.Add("Content-Type","application/json");
      response.Send(Encoding.UTF8.GetBytes(json));
      response.CompleteResponse();
    }
  }
}

And hyper.config:

<!-- vim: set ft=xml: -->
<configuration>
  <server type="HyperFastCgi.ApplicationServers.SimpleApplicationServer">
    <host-factory>HyperFastCgi.HostFactories.SystemWebHostFactory</host-factory>
    <threads min-worker="40" max-worker="0" min-io="4" max-io="0"/>
    <root-dir>/opt/hyper</root-dir>
  </server>
  <listener type="HyperFastCgi.Listeners.NativeListener">
    <apphost-transport type="HyperFastCgi.Transports.NativeTransport">
      <multithreading>ThreadPool</multithreading>
    </apphost-transport>
    <protocol>Unix</protocol>
    <address>/var/tmp/hyper.sock</address>
  </listener>
  <apphost type="HyperFastCgi.AppHosts.Raw.RawHost">
    <log level="All" write-to-console="true" />
    <add-trailing-slash>false</add-trailing-slash>
    <request-type>Reflect.PeekRequest,Reflect</request-type>
  </apphost>
</configuration>

Mono:
Mono JIT compiler version 4.6.2 (Stable 4.6.2.7/08fd525 Mon Nov 14 12:30:00 UTC 2016)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: amd64
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: sgen

Machine:
Linux vm1 3.2.0-4-amd64 #1 SMP Debian 3.2.82-1 x86_64 GNU/Linux
(7 / Wheezy)