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UNW_GET...E_BY_IP(3libunwind) Programming Library UNW_GET...E_BY_IP(3libunwind) NAME unw_get_elf_filename_by_ip -- get backing elf filename by instruction pointer SYNOPSIS #include <libunwind.h> int unw_get_elf_filename_by_ip(unw_addr_space_t as, unw_word_t ip, char *bufp, size_t len, unw_word_t *offp, void *arg); DESCRIPTION The unw_get_elf_filename_by_ip() routine returns the backing elf filename of a instruction pointer just like unw_get_elf_filename(), except that the name is looked up by instruction pointer (IP) instead of a cursor. The routine expects the following arguments: as is the address-space in which the instruction pointer should be looked up. For a look-up in the local address-space, unw_local_addr_space can be passed for this argument. Argument ip is the instruction-pointer for which the elf filename should be looked up. The bufp argument is a pointer to a character buffer that is at least len bytes long. This buffer is used to return the elf filename. The offp argument is a pointer to a word that is used to return the byte offset of the instruction-pointer relative to the start of the elf filename. Lastly, arg is the address space argument that should be used when access- ing the address space. It has the same purpose as the argument of the same name for unw_init_remote(). When accessing the local address space (first argument is unw_local_addr_space), NULL must be passed for this argument. RETURN VALUE On successful completion, unw_get_elf_filename_by_ip() returns 0. Otherwise the negative value of one of the error codes below is returned. THREAD AND SIGNAL SAFETY unw_get_elf_filename_by_ip() is thread safe. If the local address-space is passed in argument as, this routine is also safe to use from a signal han- dler. 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_elf_filename(3libunwind), unw_cre- ate_addr_space(3libunwind), unw_init_remote(3libunwind) AUTHOR Xiang Lin Email: myd.xia@gmail.com Programming Library 15 September 2023 UNW_GET...E_BY_IP(3libunwind)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | THREAD AND SIGNAL SAFETY | ERRORS | SEE ALSO | AUTHOR
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