В Fedora 29 с POCO C ++, установленным с использованием
dnf install poco-devel
Этот код:
#include <Poco/Net/ServerSocket.h>
int main() {
Poco::Net::ServerSocket svs(9980);
return 0;
}
Скомпилирован с использованием этого файла Makefile:
CC = g++
CPPFLAGS += -I/usr/include
CPPFLAGS += -I/usr/include/Poco
CFLAGS += -c
CFLAGS += -g
LDFLAGS += -g
LDLIBS += -lPocoFoundation
LDLIBS += -lPocoUtil
LDLIBS += -lPocoNet
SOURCES = test.cpp
OBJECTS = $(SOURCES:.cpp=.o)
EXECUTABLE = test
all: $(EXECUTABLE)
$(EXECUTABLE): $(OBJECTS)
$(CC) $(LDFLAGS) $(OBJECTS) $(LDLIBS) -o $@
.cpp.o:
$(CC) $(CPPFLAGS) $(CFLAGS) $< -o $@
install:
@echo "Build complete!"
Дает следующее вgdb
Thread #1 [test] 8015 [core: 3] (Suspended : Signal :
SIGSEGV:Segmentation fault) typeinfo name for
Poco::Net::Impl::IPv6SocketAddressImpl() at 0x4020c0
Poco::Net::SocketAddress::toString[abi:cxx11]() const at
0x7ffff7ce2239 Poco::Net::SocketImpl::bind() at 0x7ffff7ce74c8
Poco::Net::ServerSocket::ServerSocket() at 0x7ffff7ce0e78 main() at
test.cpp:6 0x4011c5
И в valgrind:
==8034== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==8034== Bad permissions for mapped region at address 0x4020C0
==8034== at 0x4020C0: ??? (in /path/to/test85-poco/test)
==8034== by 0x4BCB238: Poco::Net::SocketAddress::toString[abi:cxx11]() const (in
/usr/lib64/libPocoNet.so.60)
==8034== by 0x4BD04C7: Poco::Net::SocketImpl::bind(Poco::Net::SocketAddress const&, bool,
bool) (in /usr/lib64/libPocoNet.so.60)
==8034== by 0x4BC9E77: Poco::Net::ServerSocket::ServerSocket(unsigned short, int) (in
/usr/lib64/libPocoNet.so.60)
==8034==
Передача -v в g ++ приводит к:
g++ -I/usr/include -I/usr/include/Poco -c -g -v test.cpp -o test.o
Using built-in specs.
COLLECT_GCC=g++
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl --enable-libmpx --enable-offload-targets=nvptx-none --without-cuda-driver --enable-gnu-indirect-function --enable-cet --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 8.2.1 20181105 (Red Hat 8.2.1-5) (GCC)
COLLECT_GCC_OPTIONS='-I' '/usr/include' '-I' '/usr/include/Poco' '-c' '-g' '-v' '-o' 'test.o' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-redhat-linux/8/cc1plus -quiet -v -I /usr/include -I /usr/include/Poco -D_GNU_SOURCE test.cpp -quiet -dumpbase test.cpp -mtune=generic -march=x86-64 -auxbase-strip test.o -g -version -o /tmp/ccDd0TCY.s
GNU C++14 (GCC) version 8.2.1 20181105 (Red Hat 8.2.1-5) (x86_64-redhat-linux)
compiled by GNU C version 8.2.1 20181105 (Red Hat 8.2.1-5), GMP version 6.1.2, MPFR version 3.1.6-p2, MPC version 1.1.0, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/8/include-fixed"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/8/../../../../x86_64-redhat-linux/include"
ignoring duplicate directory "/usr/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/usr/include/Poco
/usr/lib/gcc/x86_64-redhat-linux/8/../../../../include/c++/8
/usr/lib/gcc/x86_64-redhat-linux/8/../../../../include/c++/8/x86_64-redhat-linux
/usr/lib/gcc/x86_64-redhat-linux/8/../../../../include/c++/8/backward
/usr/lib/gcc/x86_64-redhat-linux/8/include
/usr/local/include
/usr/include
End of search list.
GNU C++14 (GCC) version 8.2.1 20181105 (Red Hat 8.2.1-5) (x86_64-redhat-linux)
compiled by GNU C version 8.2.1 20181105 (Red Hat 8.2.1-5), GMP version 6.1.2, MPFR version 3.1.6-p2, MPC version 1.1.0, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: a86aaae86aad006cc531272eca0396eb
COLLECT_GCC_OPTIONS='-I' '/usr/include' '-I' '/usr/include/Poco' '-c' '-g' '-v' '-o' 'test.o' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
as -v -I /usr/include -I /usr/include/Poco --64 -o test.o /tmp/ccDd0TCY.s
GNU assembler version 2.31.1 (x86_64-redhat-linux) using BFD version version 2.31.1-13.fc29
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux/8/:/usr/libexec/gcc/x86_64-redhat-linux/8/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/8/:/usr/lib/gcc/x86_64-redhat-linux/
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/8/:/usr/lib/gcc/x86_64-redhat-linux/8/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-redhat-linux/8/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-I' '/usr/include' '-I' '/usr/include/Poco' '-c' '-g' '-v' '-o' 'test.o' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
g++ -g test.o -lPocoFoundation -lPocoUtil -lPocoNet -o test
Более сложный подход дает аналогичный результат:
#include <Poco/Net/ServerSocket.h>
#include <iostream>
int main() {
std::string Address("192.168.0.11:9980");
Poco::Net::SocketAddress addr(Address);
if (addr.family() == static_cast<Poco::Net::IPAddress::Family>(Poco::Net::Impl::IPAddressImpl::IPv6)) {
std::cout << "Addr: ipv6 " << std::endl;
}
else if (addr.family() == static_cast<Poco::Net::IPAddress::Family>(Poco::Net::Impl::IPAddressImpl::IPv4)) {
std::cout << "Addr: ipv4 " << std::endl;
}
else {
std::cout << "Addr: something else (err)." << std::endl;
}
Poco::Net::ServerSocket svs(addr);
return 0;
}
При этом на консоли:
Addr: ipv4
трассировка стека GDB:
Thread #1 [test] 7865 [core: 0] (Suspended : Signal :
SIGSEGV:Segmentation fault) typeinfo name for
Poco::Net::Impl::IPv6SocketAddressImpl() at 0x403100
Poco::Net::SocketAddress::toString[abi:cxx11]() const at
0x7ffff7ce2239 Poco::Net::SocketImpl::bind() at 0x7ffff7ce74c8
Poco::Net::ServerSocket::ServerSocket() at 0x7ffff7ce0db7 main() at
test.cpp:39 0x40236a
и отчет valgrind:
==7616== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==7616== Bad permissions for mapped region at address 0x403100
==7616== at 0x403100: ??? (in /path/to/test85-poco/test)
==7616== by 0x4BCB238: Poco::Net::SocketAddress::toString[abi:cxx11]() const (in
/usr/lib64/libPocoNet.so.60)
==7616== by 0x4BD04C7: Poco::Net::SocketImpl::bind(Poco::Net::SocketAddress const&, bool,
bool) (in /usr/lib64/libPocoNet.so.60)
==7616== by 0x4BC9DB6: Poco::Net::ServerSocket::ServerSocket(Poco::Net::SocketAddress const&,
int) (in /usr/lib64/libPocoNet.so.60)
==7616== by 0x402375: main (test.cpp:38)
Вопрос:
Как создать ServerSocket в Linux с помощью POCO, который выполняется без ошибки сегментации?