UNW_GET_ELF_FILENAME(3libunwind)                          Programming Library

NAME
       unw_get_elf_filename -- get backing elf filename

SYNOPSIS
       #include <libunwind.h>

       int unw_get_elf_filename(unw_cursor_t *cp, char *bufp, size_t len,
       unw_word_t *offp);

DESCRIPTION
       The unw_get_elf_filename() routine returns the backing elf filename of
       the current instruction pointer that created the stack frame identified
       by argument cp.  The bufp argument is a pointer to a character buffer
       that is at least len bytes long. This buffer is used to return the name
       of the procedure. The offp argument is a pointer to a word that is used
       to return the byte offset of the instruction pointer saved in the stack
       frame identified by cp, relative to the start of the elf file. For
       embedded system the symbol information may has been stripped from a
       program, then unw_get_proc_name() may be completely unavailable, if the
       host side have the unstripped program with debuginfo, then can use
       addr2line command tool on host to get the source file name and line
       number of the instruction pointer, with the elf filename in bufp and
       address in offp.

RETURN VALUE
       On successful completion, unw_get_elf_filename() returns 0.  Otherwise
       the negative value of one of the error codes below is returned.

THREAD AND SIGNAL SAFETY
       unw_get_elf_filename() is thread safe. If cursor cp is in the local
       address space, this routine is also safe to use from a signal handler.

ERRORS
       UNW_EUNSPEC
               An unspecified error occurred.

       UNW_ENOINFO
               Libunwind was unable to determine the elf filename of the
              instruction pointer.

       UNW_ENOMEM
               The elf filename is too long to fit in the buffer provided. A
              truncated version of the name has been returned.

SEE ALSO
       libunwind(3libunwind), unw_get_proc_info(3libunwind)
       unw_get_proc_name(3libunwind) unw_get_elf_filename_by_ip(3libunwind)
       addr2line(1addr2line)

AUTHOR
       Xiang Lin
       Email: myd.xia@gmail.com

Programming Library            15 September 2023
                                              UNW_GET_ELF_FILENAME(3libunwind)