DragonFly On-Line Manual Pages

Search: Section:  

UNW_BACKTRACE(3)             Programming Library              UNW_BACKTRACE(3)


NAME

       unw_backtrace -- return backtrace for the calling program


SYNOPSIS

       #include <libunwind.h>

       int unw_backtrace(void **buffer, int size);

       #include <execinfo.h>

       int backtrace(void **buffer, int size);


DESCRIPTION

       unw_backtrace() is a convenient routine for obtaining the backtrace for
       the calling program. The routine fills up to size addresses in the
       array pointed by buffer.  The routine is only available for local
       unwinding.

       Note that many (but not all) systems provide practically identical
       function called backtrace().  The prototype for this function is
       usually obtained by including the <execinfo.h> header file -- a
       prototype for backtrace() is not provided by libunwind.  libunwind
       weakly aliases backtrace() to unw_backtrace(), so when a program
       calling backtrace() is linked against libunwind, it may end up calling
       unw_backtrace().


RETURN VALUE

       The routine returns the number of addresses stored in the array pointed
       by buffer.  The return value may be zero to indicate that no addresses
       were stored.


SEE ALSO

       libunwind(3), unw_step(3)


AUTHOR

       David Mosberger-Tang
       Email: dmosberger@gmail.com
       WWW: http://www.nongnu.org/libunwind/.

Programming Library             31 August 2012                UNW_BACKTRACE(3)

Search: Section: