c++ Crash happened when built with -xipo -xO4 - c++

Question

Could you please help to take a look into my case and give me your advice?
I wrote a simple c++ code on UNIX. If I compiled code with optimization, it got crashed at _Unwind_Resume. It run successfully if I compiled without optimization.
The code look like this:
date.h
pragma once
#include <string>
namespace Test
{
class Date
{
public:
std::string asString() const;
};
}
date.C
#include "date.h"
std::string Test::Date::asString() const
{
return std::string();
}
process.h
#pragma once
namespace Test
{
class Date;
class Process
{
public:
void operator()( );
private:
void attemptProcessing( const Test::Date& );
void firstValidation( const Test::Date& );
void secondValidation( const Test::Date& );
};
void doPostingProcess( );
}
process.C
#include <exception>
#include <iostream>
#include <sstream>
/*------------------------------------------------------------------------*/
void Test::Process::operator()()
{
try {
Test::Date date;
attemptProcessing( date );
} catch ( const std::exception& e ) {
std::cout << "ex: " << e.what() << std::endl;
}
}
void Test::Process::attemptProcessing( const Test::Date& d)
{
std::cout << "If remove this, crash does not happen: " << d.asString() << std::endl;
firstValidation( d );
}
void Test::Process::firstValidation( const Test::Date& d )
{
secondValidation( d );
}
void Test::Process::secondValidation( const Test::Date& d )
{
std::ostringstream o;
o << "If remove this, crash does not happen";
throw std::exception();
}
void Test::doPostingProcess( )
{
auto processAccount = Test::Process();
processAccount();
}
test_validation.C
#include "process.h"
#include "date.h"
#include <iostream>
#include "process.h"
int main( int argc, char const* argv[] )
{
try {
Test::doPostingProcess( );
} catch( std::exception ex ) {
std::cout << ex.what() << std::endl;
}
return 0;
}
When I compiled with optimization, the program was crashed. The compile command is:
/opt/developerstudio12.6/bin/CC -std=c++14 -xipo -xO4 +w -xildoff -D_POSIX_PTHREAD_SEMANTICS -g0 -xtarget=generic -xcache=generic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 date.C process.C test_validation.C
However, with this compile command( without optimization) the program worked well:
/opt/developerstudio12.6/bin/CC -std=c++14 +w -xildoff -D_POSIX_PTHREAD_SEMANTICS -g0 -xtarget=generic -xcache=generic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 date.C process.C test_validation.C
The print stack of core dump is:
core '/var/corefiles/core.dc2nix1d3v10.a.out.28170' of 28170: a.out
fedaec9c _lwp_kill (6, 0, 0, fed8e13c, ffffffff, 6) + 8
fed229c8 abort (2, 1, fef9f068, ffb40, fee25518, 0) + 110
fef8c22c _Unwind_Resume (22db8, 0, ff150e58, ff150b5c, ffbfd944, ffbfd718) + 58
000122b8 main (22c00, 12800, ffbfdcf4, 22db8, 20, ffbfdcf3) + 488
00011728 _start (0, 0, 0, 0, 0, 22870) + 108

Answer 1

Are you sure the main try/catch is actually catching?
I would better catch by reference as suggested by:
C++ catch blocks - catch exception by value or reference?
I suspect that you get an uncaught exception from the stream operations.