unw_get_proc_info_in_range - Man Page
get procedure info in IP range and a frame index table
int unw_get_proc_info_in_range(unw_word_t start_ip, unw_word_t end_ip, unw_word_t eh_frame_table, unw_word_t eh_frame_table_len, unw_word_t exidx_frame_table, unw_word_t exidx_frame_table_len,, unw_addr_space_t *as, void *arg);
The unw_get_proc_info_in_range() routine returns the same kind of auxiliary information about a procedure as unw_get_proc_info_by_ip(), except that the info is looked up in instruction-pointer (IP) range and frame table instead of just at IP. This is equally flexible because it is possible to look up the info for an arbitrary procedure, even if it is not part of the current call-chain. However, since it is more flexible, it also tends to run slower (and often much slower) than unw_get_proc_info().
On successful completion, unw_get_proc_info_in_range() returns 0. Otherwise the negative value of one of the error-codes below is returned.
Thread and Signal Safety
unw_get_proc_info_in_range() is thread-safe. If the local address-space is passed in argument as, this routine is also safe to use from a signal handler.
An unspecified error occurred.
Libunwind was unable to locate unwind-info for the procedure.
The unwind-info for the procedure has version or format that is not understood by libunwind.
An unsupported table encoding was specified.
In addition, unw_get_proc_info_by_ip() may return any error returned by the access_mem() call-back (see unw_create_addr_space(3)).
libunwind(3), unw_get_proc_info_in_range(3), unw_create_addr_space(3), unw_get_proc_name(3), unw_get_proc_info(3)