c++ stack trace from unhandled exception? [duplicate]

Edited Answer:

You can use std::set_terminate

#include <cstdlib>
#include <iostream>
#include <stdexcept>

#include <execinfo.h>

void
handler()
{
    void *trace_elems[20];
    int trace_elem_count(backtrace( trace_elems, 20 ));
    char **stack_syms(backtrace_symbols( trace_elems, trace_elem_count ));
    for ( int i = 0 ; i < trace_elem_count ; ++i )
    {
        std::cout << stack_syms[i] << "\n";
    }
    free( stack_syms );

    exit(1);
}   

int foo()
{
    throw std::runtime_error( "hello" );
}   

void bar()
{
    foo();
}

void baz()
{
    bar();
}

int
main()
{
    std::set_terminate( handler );
    baz();
}

giving this output:

samm@macmini ~> ./a.out 
./a.out [0x10000d20]
/usr/lib/libstdc++.so.6 [0xf9bb8c8]
/usr/lib/libstdc++.so.6 [0xf9bb90c]
/usr/lib/libstdc++.so.6 [0xf9bbaa0]
./a.out [0x10000c18]
./a.out [0x10000c70]
./a.out [0x10000ca0]
./a.out [0x10000cdc]
/lib/libc.so.6 [0xfe4dd80]
/lib/libc.so.6 [0xfe4dfc0]
samjmill@bgqfen4 ~> 

assuming you have debug symbols in your binary, you can then use addr2line to construct a prettier stack trace postmortem

samm@macmini ~> addr2line 0x10000c18
/home/samm/foo.cc:23
samm@macmini ~> 

original answer is below

I’ve done this in the past using boost::error_info to inject the stack trace using backtrace from execinfo.h into an exception that is thrown.

typedef boost::error_info<struct tag_stack_str,std::string> stack_info;

Then when catching the exceptions, you can do

} catch ( const std::exception& e ) {                                                                                                            
    if ( std::string const *stack boost::get_error_info<stack_error_info>(e) ) {                    
        std::cout << stack << std::endl;
    }
}