I can't reload my new *.so static link protobuf on archlinux.

[pass86]

main load warp.so
warp.so load core.so
make some change build new core.so
replace core.so
warp.so reload core.so
my change hasn't loaded
and maybe crash

main is always running
if I remove the *.pb.cc change is reloaded

I have done dlopen, dlsym, dlclose
I comment code and found ::google::protobuf::DescriptorPool::InternalAddGeneratedFile in AddDescriptorsImpl is the key
I think protobuf make core.so can't unload

protobuf-3.4.1
./configure CXXFLAGS=-fPIC

core.so
add_definitions("-std=c++11")
set(Protobuf_USE_STATIC_LIBS ON)
find_package(Protobuf)
set(inc_list ${Protobuf_INCLUDE_DIRS})
set(lib_list ${Protobuf_LIBRARIES})
include_directories(${inc_list})
add_library(core SHARED src/proto/core.pb.cc ${src_list})
target_link_libraries(core ${lib_list})

gcc 7.2.0

SOS

[acozzette]

@xfxyjwf may have more info on this, but I believe we don't support dynamically loading protos, or especially reloading the same proto multiple times. This might be related to #1489.

[pass86]

windows and macos reload my change.