Re: [boost] Any interest for stack_trace?

From: Suman Cherukuri (suman_at_[hidden])
Date: 2007-04-20 13:15:35

> -----Original Message-----
> From: boost-bounces_at_[hidden] [mailto:boost-bounces_at_[hidden]]
> On Behalf Of Atry
> Sent: Friday, April 20, 2007 10:05 AM
> To: boost_at_[hidden]
> Subject: [boost] Any interest for stack_trace?
> 
> Java programs are easy to debug, one who catch an exception can print
> the stack trace, and when it crash, it would print the stack, too. It is
> useful, so I wrote some code of stack_trace for C++, see the sample below:
> 
Yes, I like it.  It'd be very useful 
> /***** sample.cpp *****/
> #include <boost/stack_trace.hpp>
> #include <iostream>
> #include <sstream>
> using namespace boost;
> using namespace std;
> 
> class exception_with_stack_trace : public exception
> {
> private:
>     std::string what_;
> public:
>     exception_with_stack_trace(const char* file, unsigned int line,
> const char* func)
>     {
>         stringstream ss;
>         ss << "exception occurred at " << func << " (" << file << ":" <<
> line << ")\n";
>         vector<stack_trace::element const *> const & st =
> stack_trace::get();
>         for(size_t i = st.size(); --i != 0; )
>         {
>             ss << "\tfrom " << st[i]->tag() << " (" << st[i]->file() <<
> ":" << st[i]->line() << ")\n";
>         }
>         what_ = ss.str();
>     }
>     virtual exception_with_stack_trace::~exception_with_stack_trace()
> throw (){}
>     virtual const char * what() const throw ()
>     {
>         return what_.c_str();
>     }
> };
> 
> void foo(int a)
> {
>     BOOST_STACK_TRACK_CALL;
>     cout << stack_trace::to_string() << endl;
>     if(a == 1)
>     {
>         throw exception_with_stack_trace(__FILE__, __LINE__,
> __FUNCTION__);
>     }
> 
> }
> void foo()
> {   BOOST_STACK_TRACK_CALL;
>     foo(0);
>     foo(1);
>     cout << stack_trace::to_string() << endl;
> }
> void bar()
> {   BOOST_STACK_TRACK_CALL;
>     foo();
>     cout << stack_trace::to_string() << endl;
> }
> 
> int main()
> {
>     BOOST_STACK_TRACK_CALL;
>     try
>     {
>         BOOST_STACK_TRACK_TAG("try");
>         foo();
>         cout << stack_trace::to_string() << endl;
>         bar();
>         cout << stack_trace::to_string() << endl;
>     }
>     catch(exception& e)
>     {
>         cerr << e.what() << endl;
>     }
> }
> /***** sample.cpp *****/
> 
> And run it to print below:
> 
> 1> stdout
> sample.cpp 54 main
> sample.cpp 57 try
> sample.cpp 41 foo
> sample.cpp 32 foo
> 
> sample.cpp 54 main
> sample.cpp 57 try
> sample.cpp 41 foo
> sample.cpp 32 foo
> 
> 2> stderr
> exception occurred at foo (sample.cpp:36)
>         from foo (sample.cpp:32)
>         from foo (sample.cpp:41)
>         from try (sample.cpp:57)