similar to: [LLVMdev] Function attribute size limit

On 10/26/10 5:24 PM, Michael Spencer wrote: > The linker adds the padding. Also, the first instruction just has to > be two bytes or longer. Not exactly two bytes. How then does the linker know to add the padding? I assume there's a PE-COFF attribute that will do that, but what about other file formats, like ELF or Mach-O? Bear in mind that I'm doing this for the Wine project, so

While I'd like to see support for hotpatching, the other Clang bugs block it from being useful. If Mozilla is close to working, let them have it. Thanks for asking :). -Austin On Thu, Sep 29, 2011 at 21:39, Charles Davis <cdavis at mymail.mines.edu> wrote: > Howdy Austin, > > I'm about to sacrifice the Hotpatch attribute (which I added a long time ago to start fixing

[Proposed langref entry] The "patchable-prologue" attribute on a function is a general mechanism to control the form of a function's prologue in ways that make it easy to patch at runtime. Currently only one value is supported: # "hotpatch-compact" If a function is marked with "patchable-prologue"="hotpatch-compact" then: 1. The first instruction

Hi, According to http://blogs.msdn.com/b/freik/archive/2006/03/07/x64-hotpatchability.aspx, 'hotpatchable' functions on x86 (and by extension, x86-64) are preceded by six bytes of padding and start with a two byte instruction. The problem is that, still being relatively unfamiliar with the x86 backend, I have no idea how to implement this for the 'hotpatch' attribute I just added.

> I don't know how GCC handles this case. They may do the padding in the > compiler. You are going to have to look at exactly what GCC does and > whatever hotpatch loader Wine uses to figure out what to do, but it > will most likely be incompatible with the Windows implementation. Why? I don't see how this might be incompatible with what MS linker does; in any case the end

I think most function redirection patching schemes are going to be mutually incompatible, so I'm not sure it makes sense to make this attribute a comma-separated list. I think Eric's and Dean's use case may be better addressed by a separate attribute. My recollection is that they want to add nop slides to the prologue and epilogue that can be hotpatched to enable and disable

On Tue, Oct 26, 2010 at 7:27 PM, Charles Davis <cdavis at mymail.mines.edu> wrote: > On 10/26/10 5:24 PM, Michael Spencer wrote: >> The linker adds the padding. Also, the first instruction just has to >> be two bytes or longer. Not exactly two bytes. > How then does the linker know to add the padding? I assume there's a > PE-COFF attribute that will do that, Nope,

Reid Kleckner wrote: > I'm assuming this attribute won't affect inlining or other IPO in any > way, but you should probably mention that in the langref. To directly answer this, this is just a *mechanism* to implement linkonce_odr type linkage. This in itself does not imply in IPO restrictions, that should come directly from the linkage type. -- Sanjoy

On Mon, Jun 17, 2013 at 10:29 AM, Jeffrey Walton <noloader at gmail.com> wrote: > > > First is to ensure dead-writes are not removed. For example, a > function that zeroizes or wipes memory is subject to removal during > optimization. I often have to look at program's disassembly to ensure > the memset is not removed by the optimizer. > Appropriate use of `volatile`

On Mon, Jun 17, 2013 at 6:23 PM, Sean Silva <silvas at purdue.edu> wrote: > On Mon, Jun 17, 2013 at 10:29 AM, Jeffrey Walton <noloader at gmail.com> wrote: >> First is to ensure dead-writes are not removed. For example, a >> function that zeroizes or wipes memory is subject to removal during >> optimization. I often have to look at program's disassembly to

On Tue, Oct 26, 2010 at 7:02 PM, Charles Davis <cdavis at mymail.mines.edu> wrote: > Hi, > > According to > http://blogs.msdn.com/b/freik/archive/2006/03/07/x64-hotpatchability.aspx, > 'hotpatchable' functions on x86 (and by extension, x86-64) are preceded > by six bytes of padding and start with a two byte instruction. The > problem is that, still being

Hi everyone, It'd be useful for our purposes if we could attach metadata to named structs. In particular, in Rust we're looking to use this information to communicate information about our discriminated unions to the garbage collector. (We could, and are at the moment, using the metadata argument to the gcroot intrinsic, but this seems to inhibit optimizations and adds a fair amount

Hello everybody I use cwrsync in a mixed servers network to make backup. I have a problem with Windows perms when rsync makes backups from Windows directorys like /winnt or /Documents and Settings. Rsync starts his job, but anytime when the console shows a message like this: "opendir "Area NET" (in unitd) failed: Permission denied" the job stop and the backup is

Ladies and Gentlemen, As Johan Lindberg points out, the documentation for handling dendrograms is sparse....Does anyone know who is responsible for or working on development of tree methods and objects? I've written a couple of scripts for my own use to translate between parenthetical (A(B(CD))) or binary A00 B10 C11 D11 tree formats and cluster objects in R, but as an inexperienced

I hope no one gets offended by my asking, but I wonder what others think about the possibility of splitting the list into two or three focal areas. Personally, I think I''d like to see three seperate lists: 1) newbie development (e.g., help working through tutorials, etc.) 2) more advanced development topics, 3) environment setup / admin.. What do you think? Best regards, Bill

Hi Andrea, This would be very useful. On Mon, Jun 17, 2013 at 11:58 AM, <Andrea_DiBiagio at sn.scee.net> wrote: > > I previously made a proposal for adding a pragma for per-function > optimization level control due to a number of requests from our customers > (See http://comments.gmane.org/gmane.comp.compilers.clang.devel/28958 for > the previous discussion), however the

I would really appreciate some help with changing a link_to_remote call to a button of some sort. Here''s a little background. On the page there are two <div>s. One is a form that lets the visitor enter items. The second <div> is where the entered items get displayed, each in it''s own item <div>. Each item <div> has two <span>s. The first one

Is there any way to tell Rails to send the .html file it renders somewhere other than the web server? I need to save a page to the server''s file system instead of sending it to the user''s browser. Thanks! Bill -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060518/facce47e/attachment.html

I''ve looked at the validates documentation and it appears that validates_uniqueness_of works on only one field at a time. So I can, for example, validate that "sam" is unique to the record set, and that "smith" is unique to the record set. My problem is that each record includes two fields, the _combination_ of which must be unique to the record set, but each of

On Mon, Jun 17, 2013 at 1:59 PM, jahanian <fjahanian at apple.com> wrote: > Wouldn’t implementing this proposal be a red herring? By this I mean, it is > possible that > throughout the optimization phases, there is an implied assumption that all > functions > are similarly optimized. An example would be under certain optimization > flag, compiler changes > calling