unwinddump(1) General Commands Manual unwinddump(1)

unwinddump — Displays compact unwind information in an executable

unwinddump [-arch arch-name] file(s)

When a C++ (or x86_64 Objective-C) exception is thrown, the runtime must unwind the stack looking for some function to catch the exception. Traditionally, the unwind information is stored in the __TEXT/__eh_frame section of each executable as Dwarf CFI (call frame information). Beginning in Mac OS X 10.6, the unwind information is also encoded in the __TEXT/__unwind_info section using a two-level lookup table of compact unwind encodings.

The unwinddump tool displays the content of the __TEXT/__unwind_info section.

ld(1) dwarfdump(1)

November 7, 2008 Darwin