Deadlock in combination with pthread, lwip and grpc

[Christian Helmuth]

Hello Sid,

I tried to run your stress test on Ubuntu 18.04 but only get the
following log. Do you have a hint how to get rid of the exception?

  > ./greeter_client 10.0.2.55:8899
  Sending greeter to: 10.0.2.55:8899
  Floating point exception (core dumped)

I installed the Ubuntu protobuf/grpc programming environment.

  > apt policy protobuf* grpc*
  protobuf-compiler:
    Installed: 3.0.0-9.1ubuntu1
    Candidate: 3.0.0-9.1ubuntu1
    Version table:
   *** 3.0.0-9.1ubuntu1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  protobuf-compiler-grpc:
    Installed: 1.3.2-1.1~build1
    Candidate: 1.3.2-1.1~build1
    Version table:
   *** 1.3.2-1.1~build1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  libgrpc++1:
    Installed: 1.3.2-1.1~build1
    Candidate: 1.3.2-1.1~build1
    Version table:
   *** 1.3.2-1.1~build1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  libgrpc-dev:
    Installed: 1.3.2-1.1~build1
    Candidate: 1.3.2-1.1~build1
    Version table:
   *** 1.3.2-1.1~build1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  protobuf-compiler-grpc:
    Installed: 1.3.2-1.1~build1
    Candidate: 1.3.2-1.1~build1
    Version table:
   *** 1.3.2-1.1~build1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  libgrpc++-dev:
    Installed: 1.3.2-1.1~build1
    Candidate: 1.3.2-1.1~build1
    Version table:
   *** 1.3.2-1.1~build1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  libgrpc3:
    Installed: 1.3.2-1.1~build1
    Candidate: 1.3.2-1.1~build1
    Version table:
   *** 1.3.2-1.1~build1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status

I also patched the stress-test tool to compile with this invironment.

  > git diff
  diff --git a/greeter_client.cc b/greeter_client.cc
  index 970e82e..a5207fb 100644
  --- a/greeter_client.cc
  +++ b/greeter_client.cc
  @@ -20,7 +20,7 @@
   #include <memory>
   #include <string>
   
  -#include <grpcpp/grpcpp.h>
  +#include <grpc++/grpc++.h>
   
   #ifdef BAZEL_BUILD
   #include "examples/protos/helloworld.grpc.pb.h"

Greets
-- 
Christian Helmuth
Genode Labs

https://www.genode-labs.com/ · https://genode.org/
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