C++ exceptions are not caught, if app built with "-dynamic -lc -ldl -lpthread"

Question

I have C++ app that uses Boost.Asio and OpenSSL. I try to build app in Ubuntu 16.04 and I am stucked.

All .cpp files compiled correctly. Compilation flags: -m64 -O0 -Wall -Wextra -MMD -std=c++11

With linking I have a problem. My command line for the linker:

LIBS = -static -L$(BOOST_LIBS) -l:..boostlibs \
    -L$(OPENSSL_LIBS) -l:libssl.a -l:libcrypto.a \
    -Wl,-Bdynamic -lc -ldl -lpthread \
    -Wl,-dynamic-linker=/lib64/ld-linux-x86-64.so.2
g++ *.o $(LIBS) -o executablefile

(*.o means list of all object files needed for the app)

This command works fine, app can be launched. But in this app blocks try{} catch(...){} do not work at all. If any exception is thrown - my app terminated.

I made simple app and used only shared libs to build it. I.e. I removed -Wl,-Bdynamic from the linker options. All works fine, exceptions catched. But my app requires shared libs and I do not know what to do with that.

How to fix catching of exceptions?

P.S.

Arguments -Wl,-Bdynamic -lc -ldl -lpthread needed because without them I get error from the linker:

/home/.../openssl/openssl-1.0.2h-x64-build/lib/libcrypto.a(dso_dlfcn.o): In function dlfcn_globallookup': dso_dlfcn.c:(.text+0x11): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /home/.../xxx.o: In functionboost::asio::detail::resolver_service::resolve(std::shared_ptr&, boost::asio::ip::basic_resolver_query const&, boost::system::error_code&)': xxx.cpp:(.text._ZN5boost4asio6detail16resolver_serviceINS0_2ip3tcpEE7resolveERSt10shared_ptrIvERKNS3_20basic_resolver_queryIS4_EERNS_6system10error_codeE[_ZN5boost4asio6detail16resolver_serviceINS0_2ip3tcpEE7resolveERSt10shared_ptrIvERKNS3_20basic_resolver_queryIS4_EERNS_6system10error_codeE]+0xd7): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking

This error perfectly described here and seems that I have to use shared libraries.

Argument -Wl,-dynamic-linker=/lib64/ld-linux-x86-64.so.2 needed because g++ not able to locate path to the shared lib ld. And if I try to launch compiled app I got error: No such file or directory.

P.S. 2

I use Ubuntu 16.04.2 and gcc 5.4.0

UPD

Just to be clear. If I add code below to the start of the main function - my app terminated.

try
{
    throw std::exception();
}
catch(...)
{
    std::cerr << "hello from the catch.";
}

Are you remembering to catch exceptions at/before the exit of each of your thread procs? — Richard Critten, Sep 04 '16 at 19:52
yes. all thread start points wrapped in try-catch. If I add test code into my app with exception thrown from inside the try-catch - app terminated — Victor Mezrin, Sep 04 '16 at 19:53
Just to be clear the catch(s) are _inside_ the thread procs? — Richard Critten, Sep 04 '16 at 19:55
Yes ) Handling of exceptions is good. The same code on Windows works fine — Victor Mezrin, Sep 04 '16 at 19:56
Please, look at the update of my question. This is not a C++ problem, this is problem with g++ or some libs — Victor Mezrin, Sep 04 '16 at 20:03
@RustyX Yes, that fixed a problem. I just removed `-static` from the linker options and now everything works fine! Thank you very much!!! — Victor Mezrin, Sep 04 '16 at 21:37

C++ exceptions are not caught, if app built with "-dynamic -lc -ldl -lpthread"

0 Answers0