FreeBSD Manual Pages
UNW_GET...ILENAME(3libunwind) Programming Library UNW_GET...ILENAME(3libunwind) 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 ar- gument 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 proce- dure. 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 sym- bol 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 instruc- tion pointer. UNW_ENOMEM The elf filename is too long to fit in the buffer provided. A trun- cated version of the name has been returned. SEE ALSO libunwind(3libunwind), unw_get_proc_info(3libunwind) unw_get_proc_name(3li- bunwind) unw_get_elf_filename_by_ip(3libunwind) addr2line(1addr2line) AUTHOR Xiang Lin Email: myd.xia@gmail.com Programming Library 15 September 2023 UNW_GET...ILENAME(3libunwind)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | THREAD AND SIGNAL SAFETY | ERRORS | SEE ALSO | AUTHOR
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=unw_get_elf_filename&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>