Method step

system/lib/libunwind/src/UnwindCursor.hpp:3146–3187

#endif // defined(_LIBUNWIND_CHECK_HAIKU_SIGRETURN)

template <typename A, typename R> int UnwindCursor<A, R>::step(bool stage2) {
  (void)stage2;
  // Bottom of stack is defined is when unwind info cannot be found.
  if (_unwindInfoMissing)
    return UNW_STEP_END;

  // Use unwinding info to modify register set as if function returned.
  int result;
#if defined(_LIBUNWIND_CHECK_LINUX_SIGRETURN) ||                               \
    defined(_LIBUNWIND_CHECK_HAIKU_SIGRETURN)
  if (_isSigReturn) {
    result = this->stepThroughSigReturn();
  } else
#endif
  {
#if defined(_LIBUNWIND_SUPPORT_COMPACT_UNWIND)
    result = this->stepWithCompactEncoding(stage2);
#elif defined(_LIBUNWIND_SUPPORT_SEH_UNWIND)
    result = this->stepWithSEHData();
#elif defined(_LIBUNWIND_SUPPORT_TBTAB_UNWIND)
    result = this->stepWithTBTableData();
#elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
    result = this->stepWithDwarfFDE(stage2);
#elif defined(_LIBUNWIND_ARM_EHABI)
    result = this->stepWithEHABI();
#else
  #error Need _LIBUNWIND_SUPPORT_COMPACT_UNWIND or \
              _LIBUNWIND_SUPPORT_SEH_UNWIND or \
              _LIBUNWIND_SUPPORT_DWARF_UNWIND or \
              _LIBUNWIND_ARM_EHABI
#endif
  }

  // update info based on new PC
  if (result == UNW_STEP_SUCCESS) {
    this->setInfoBasedOnIPRegister(true);
    if (_unwindInfoMissing)
      return UNW_STEP_END;
  }

  return result;
}

template <typename A, typename R>
void UnwindCursor<A, R>::getInfo(unw_proc_info_t *info) {