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UNW_STEP(3libunwind) Programming Library UNW_STEP(3libunwind) NAME unw_step -- advance to next stack frame SYNOPSIS #include <libunwind.h> int unw_step(unw_cursor_t *cp); DESCRIPTION The unw_step() routine advances the unwind cursor cp to the next older, less deeply nested stack frame. RETURN VALUE On successful completion, unw_step() returns a positive value if the updated cursor refers to a valid stack frame, or 0 if the previous stack frame was the last frame in the chain. On error, the negative value of one of the error-codes below is returned. THREAD AND SIGNAL SAFETY unw_step() 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 locate the unwind-info needed to com- plete the operation. UNW_EBADVERSION The unwind-info needed to complete the operation has a version or a format that is not understood by libunwind. UNW_EINVALIDIP The instruction-pointer (``program-counter'') of the next stack frame is invalid (e.g., not properly aligned). UNW_EBADFRAME The next stack frame is invalid. UNW_ESTOPUNWIND Returned if a call to find_proc_info() returned -UNW_ESTOPUN- WIND. In addition, unw_step() may return any error returned by the find_proc_info(), get_dyn_info_list_addr(), access_mem(), access_reg(), or access_fpreg() call-backs (see unw_create_addr_space(3libunwind)). SEE ALSO libunwind(3libunwind), unw_create_addr_space(3libunwind) AUTHOR David Mosberger-Tang Email: dmosberger@gmail.com WWW: http://www.nongnu.org/libunwind/. Programming Library 29 August 2023 UNW_STEP(3libunwind)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | THREAD AND SIGNAL SAFETY | ERRORS | SEE ALSO | AUTHOR
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