On 7/9/19 5:25 PM, Segher Boessenkool wrote: > On Fri, Jul 05, 2019 at 07:28:12PM +0100, Nix wrote: >> On 5 Jul 2019, Richard Biener said: >> >>> On Fri, Jul 5, 2019 at 12:21 AM Indu Bhagat <indu.bha...@oracle.com> wrote: >>>> CTF, at this time, is type information for entities at global or file >>>> scope. >>>> This can be used by online debuggers, program tracers (dynamic tracing); >>>> More >>>> generally, it provides type introspection for C programs, with an optional >>>> library API to allow them to get at their own types quite more easily than >>>> DWARF. So, the umbrella usecases are - all C programs that want to >>>> introspect >>>> their own types quickly; and applications that want to introspect other >>>> programs's types quickly. >>> >>> What makes it superior to DWARF stripped down to the above feature set? >> >> Increased compactness. > > Does CTF support something like -fasynchronous-unwind-tables? You need > that to have any sane debugging on many platforms. Without it, you > even have only partial backtraces, on most architectures/ABIs anyway. I'd be suprised if it did since you need location information. FWIW, low level libraries like glibc depend on this stuff to support cancellation.
jeff
