search for: yermolovich

...far, I would like to give it a shot at implementing and collecting some performance numbers. 🙂 Alex ________________________________ From: James Henderson <jh7370.2008 at my.bristol.ac.uk> Sent: Thursday, November 12, 2020 2:20 AM To: Fangrui Song <maskray at google.com> Cc: Alexander Yermolovich <ayermolo at fb.com>; Robinson, Paul <paul.robinson at sony.com>; David Blaikie <dblaikie at gmail.com>; Eric Christopher <echristo at gmail.com>; Igor Kudrin <ikudrin at accesssoftek.com>; llvm-dev at lists.llvm.org <llvm-dev at lists.llvm.org> Subject: Re: [llv...

On Thu, Nov 12, 2020 at 4:43 PM Alexander Yermolovich <ayermolo at fb.com> wrote: > > Looks like there is an agreement that this path, modifying lld to order sections using relocations, should be explored. > If Igor doesn't object, since he was primary one driving DWARF64 so far, I would like to give it a shot at implementing and co...

On 2020-11-12, Alexander Yermolovich wrote: >Thanks for feedback. > >I agree with patch and numbers this will be a more concrete discussion, but I wanted to judge overall receptiveness to this approach and see maybe there was a better way. > >"Whilst the majority of objects will only have a single CU in them, there...

On 2020-11-14, Alexander Yermolovich wrote: >Thanks for doing a diff and asking in other groups. > >So if I understand your concern with using first reloc as it relates to .debug_str. > >In DWARF4 for .debug_str is referenced from .debug_info, .debug_type using DW_FORM_strp. For DWARF32 it's 32bit unsigned, for DWAR...

> -----Original Message----- > From: Fāng-ruì Sòng <maskray at google.com> > Sent: Tuesday, November 17, 2020 1:51 AM > To: Alexander Yermolovich <ayermolo at fb.com> > Cc: David Blaikie <dblaikie at gmail.com>; Wenlei He <wenlei at fb.com>; llvm- > dev at lists.llvm.org; Robinson, Paul <paul.robinson at sony.com>; James > Henderson <jh7370.2008 at my.bristol.ac.uk>; Eric Christopher > <echristo a...

This year Igor Kudrin put in a lot of work in enabling DWARF64 support in LLVM. At Facebook we are looking into it as one of the options for handling debug information over 4gigs in production environment. One concern is that due to mix of third party libraries and llvm compiled code the final library/binary will have a mix of CU that are DWARF32/64. This is supported by DWARF format. With this

...ogle.com> Cc: llvm-dev at lists.llvm.org <llvm-dev at lists.llvm.org> Subject: Re: [llvm-dev] [LLD] Support DWARF64, debug_info "sorting" On Thu, 12 Nov 2020 at 02:10, Fangrui Song <maskray at google.com<mailto:maskray at google.com>> wrote: On 2020-11-12, Alexander Yermolovich wrote: >Thanks for feedback. > >I agree with patch and numbers this will be a more concrete discussion, but I wanted to judge overall receptiveness to this approach and see maybe there was a better way. > >"Whilst the majority of objects will only have a single CU in them, there...

...c/str/macro for instance, if I recall correctly)... and if something has some 4 and 5, does it get sorted to the start? I guess so. On Tue, Nov 10, 2020 at 9:30 PM Eric Christopher via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > On Wed, Nov 11, 2020 at 12:19 AM Alexander Yermolovich via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> >> This year Igor Kudrin put in a lot of work in enabling DWARF64 support in LLVM. At Facebook we are looking into it as one of the options for handling debug information over 4gigs in production environment. One concern is that...

On Wed, Nov 11, 2020 at 12:19 AM Alexander Yermolovich via llvm-dev < llvm-dev at lists.llvm.org> wrote: > This year Igor Kudrin put in a lot of work in enabling DWARF64 support in > LLVM. At Facebook we are looking into it as one of the options for handling > debug information over 4gigs in production environment. One concern is that &...

...ly specify the ordering within the output .debug_str section. Thank You Alex ________________________________ From: Fāng-ruì Sòng <maskray at google.com> Sent: Friday, November 13, 2020 12:42 PM To: David Blaikie <dblaikie at gmail.com> Cc: Wenlei He <wenlei at fb.com>; Alexander Yermolovich <ayermolo at fb.com>; llvm-dev at lists.llvm.org <llvm-dev at lists.llvm.org>; Robinson, Paul <paul.robinson at sony.com>; James Henderson <jh7370.2008 at my.bristol.ac.uk>; Eric Christopher <echristo at gmail.com>; Igor Kudrin <ikudrin at accesssoftek.com> Subje...

...> > > > > > > > > > > > > > > > > > > > > > > > > > > On Thu, 12 Nov 2020 at 02:10, Fangrui Song <maskray at google.com> wrote: > > > > > > > > > > > > On 2020-11-12, Alexander Yermolovich wrote: > > > > > > >Thanks for feedback. > > > > > > > > > > > > > >I agree with patch and numbers this will be a more concrete discussion, but I wanted to judge overall receptiveness to this approach and see maybe there was a better wa...

On Thu, 12 Nov 2020 at 02:10, Fangrui Song <maskray at google.com> wrote: > On 2020-11-12, Alexander Yermolovich wrote: > >Thanks for feedback. > > > >I agree with patch and numbers this will be a more concrete discussion, > but I wanted to judge overall receptiveness to this approach and see maybe > there was a better way. > > > >"Whilst the majority of objects will o...

...; > >> >> >> >> On Tue, Nov 10, 2020 at 9:30 PM Eric Christopher via llvm-dev >> >> <llvm-dev at lists.llvm.org> wrote: >> >> > >> >> > >> >> > >> >> > On Wed, Nov 11, 2020 at 12:19 AM Alexander Yermolovich via llvm-dev >> <llvm-dev at lists.llvm.org> wrote: >> >> >> >> >> >> This year Igor Kudrin put in a lot of work in enabling DWARF64 >> support in LLVM. At Facebook we are looking into it as one of the options >> for handling debug informa...

...-dev at lists.llvm.org> > > Subject: Re: [llvm-dev] [LLD] Support DWARF64, debug_info "sorting" > > > > > > > > > > > > On Thu, 12 Nov 2020 at 02:10, Fangrui Song <maskray at google.com> wrote: > > > > On 2020-11-12, Alexander Yermolovich wrote: > > >Thanks for feedback. > > > > > >I agree with patch and numbers this will be a more concrete discussion, but I wanted to judge overall receptiveness to this approach and see maybe there was a better way. > > > > > >"Whilst the majority of...

On 19.11.2020 03:21, Cary Coutant wrote: >>> If the .debug_str section *by itself* exceeds 4GB, then yes any string >>> with a 32-bit reference to it must be in the first 4GB. Strings that >>> have only 64-bit references to them can be sorted to the end of the >>> section, if necessary. I wouldn't think anyone guarantees or cares >>> about the

...permail/llvm-dev/2020-November/146568.html), e.g. to support lowering to FCMLA on AArch64. * ORC JIT Weekly #26 [is out](http://lists.llvm.org/pipermail/llvm-dev/2020-November/146633.html), covering he Orc library break-up, remote TargetProcessControl, and the beginnings of a runtime. * Alexander Yermolovich started a discussion on [supporting DWARF64 with `debug_info` sorting in LLD](http://lists.llvm.org/pipermail/llvm-dev/2020-November/146522.html). * Sean Silva posted an RFC on [adding new `SVec<T> ` and `Vec<T>` convenience wrappers for SmallVector](http://lists.llvm.org/pipermail/llv...

...grui Song <maskray at google.com> Sent: Wednesday, November 11, 2020 2:59 PM To: Robinson, Paul <paul.robinson at sony.com>; James Henderson <jh7370.2008 at my.bristol.ac.uk> Cc: David Blaikie <dblaikie at gmail.com>; Eric Christopher <echristo at gmail.com>; Alexander Yermolovich <ayermolo at fb.com>; Igor Kudrin <ikudrin at accesssoftek.com>; 'llvm-dev at lists.llvm.org' <llvm-dev at lists.llvm.org> Subject: Re: [llvm-dev] [LLD] Support DWARF64, debug_info "sorting" (Adding back Cc: which got dropped) > (Igor - I don't know what...

...64, debug_info "sorting" > > > > > > > > > > > > > > > > > > > > > > > > On Thu, 12 Nov 2020 at 02:10, Fangrui Song <maskray at google.com> wrote: > > > > > > > > On 2020-11-12, Alexander Yermolovich wrote: > > > > >Thanks for feedback. > > > > > > > > > >I agree with patch and numbers this will be a more concrete discussion, but I wanted to judge overall receptiveness to this approach and see maybe there was a better way. > > > > > &g...

...linkers and DWARF producers. I don't have one as yet though. > >> >> On Tue, Nov 10, 2020 at 9:30 PM Eric Christopher via llvm-dev >> <llvm-dev at lists.llvm.org> wrote: >> > >> > >> > >> > On Wed, Nov 11, 2020 at 12:19 AM Alexander Yermolovich via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> >> >> >> This year Igor Kudrin put in a lot of work in enabling DWARF64 support in LLVM. At Facebook we are looking into it as one of the options for handling debug information over 4gigs in production environment. On...

...> Cc: llvm-dev at lists.llvm.org <llvm-dev at lists.llvm.org> > Subject: Re: [llvm-dev] [LLD] Support DWARF64, debug_info "sorting" > > > > > > On Thu, 12 Nov 2020 at 02:10, Fangrui Song <maskray at google.com> wrote: > > On 2020-11-12, Alexander Yermolovich wrote: > >Thanks for feedback. > > > >I agree with patch and numbers this will be a more concrete discussion, but I wanted to judge overall receptiveness to this approach and see maybe there was a better way. > > > >"Whilst the majority of objects will only have a...