See my replay to Michel Fortin. Just out of curiosity why does DMD use this approach with begin, content, end to determine a section on Mac OS X? Looking at the source code for object_.d in Tango for LDC, the same implementation is used for all Posix systems and that is the same approach which is used in druntime for Linux, Solaris and FreeBSD.
On 9 nov 2010, at 00:51, Walter Bright wrote: > > > Michel Fortin wrote: >> Le 2010-11-08 à 17:12, Walter Bright a écrit : >> >> >>> See my reply: http://d.puremagic.com/issues/show_bug.cgi?id=4854 >>> >> >> As a side note, I discovered this week that the Objective-C runtime also >> depends on knowing the size of a section to initialize itself properly. This >> is for a section that contains all the protocol definitions aggregated >> together; upon loading an image the list is traversed to 'fixup' the >> protocols... >> >> The interesting point is that it does so without this begin,content,end >> section trickery, so it doesn't matter if sections get reordered during >> linking, which would be much more robust. >> >> >From what I found out by digging in the source code, this involves calling >> >'getsectdatafromheader' (or 'getsectdatafromheader_64') which returns the >> >size as part of its last argument (see header "mach-o/getsect.h"). I'm not >> >exactly sure how this all works, but there's definitely a way to make it >> >work because it does work for the Objective-C runtime. Perhaps I should >> >investigate a little more and send what I find on the list for druntime. >> >> libobjc: >> >> Source Browser: >> <http://www.opensource.apple.com/source/objc4/objc4-437.1/> >> >> Source Download link: >> <http://www.opensource.apple.com/tarballs/objc4/objc4-437.1.tar.gz> >> >> > > If such works, then I'm all for using it to replace the current method. > _______________________________________________ > phobos mailing list > [email protected] > http://lists.puremagic.com/mailman/listinfo/phobos -- /Jacob Carlborg _______________________________________________ phobos mailing list [email protected] http://lists.puremagic.com/mailman/listinfo/phobos
