C Remove\sforwarding\smethods.\sSee\slong\scommit\smessage\sfor\sdetails.\n\nThere\sare\stwo\sresons\sfor\sremoving\sit:\n\nFirst,\sOFPlugin\sdoes\snot\sneed\sforwarding\sanymore.\sSecond\sis\sthat\nforwarding\sis\sbroken\sin\sboth,\sthe\sGNU\sand\sthe\sApple\sruntime.\n\nIn\sGNU\slibobjc,\sobjc_msg_sendv\sis\simplemented\susing\s__builtin_apply,\nwhich\sis\sbroken\son\smany\splatforms,\sincluding\sx86_64.\sIf\sforwarding\sis\nused,\sthe\sapplication\swill\sjust\scrash.\sTo\swork\saround\sthat,\sI'd\sneed\sto\nparse\sthe\stype\sencoding\sand\suse\slibffi\sto\scall\sthe\smethod\sinstead\sof\nusing\sobjc_msg_sendv.\n\nNow\sthe\sApple\sruntime\shas\sa\ssimilar\sproblem:\sThere\sis\sno\sobjc_msgSendv\nfor\sPPC64\sand\sx86_64\sas\sit's\sonly\sin\sObjC1\sand\son\sARM\s(iPhone),\sit's\nbroken\s(most\slikely\sbecause\sthe\siPhone\suses\sonly\sObjC2\s-\sI\swas\sconfused\nthat\sobjc_msgSendv\swas\seven\sin\sthe\slibobjc\sthere).\sSo\sI'd\sneed\sto\swrite\nan\sASM\simplementation\sfor\sthese\s3.\n\nWriting\sthose\s3\sASM\simplementations\s(or\s5,\sso\swe\sdon't\sdepend\son\sObjC1\nstuff\son\sPPC32\sand\sx86\sas\swell)\swouldn't\sbe\sa\sproblem,\sbut\sthere\sis\sa\nproblem\sthe\sGNU\slibobjc\sand\sthe\sApple\sruntime\sgot\sin\scommon,\swhich\noriginates\sfrom\sthe\searly\sObjC\simplementations:\n\nforward::\sand\sperformv::\swere\sonly\sdesigned\sto\sreturn\sscalar\stypes.\sBut\ntoday,\sit's\spossible\sto\sreturn\sfloats,\sstructs\sand\sunions\sas\swell.\sWhat\nApple\sand\sGNU\suse\shere\sis\sa\svery\shacky\sworkaround\sand\sit's\sjust\sluck\nthat\sit\sworks.\sforward::\sand\sperformv::\sboth\sreturn\san\sid\s(Apple)\sor\nvoid*\s(GNU).\sforward::\sis\scalled\sby\sthe\sruntime\sif\syou\scalled\sa\smethod\nthat\sis\snot\simplemented.\sThe\scompiler\sdoes\snot\sknow\sat\scompile\stime\nthat\sit\sis\snot\simplemented,\stherefore\sexpects\sa\sfloat\sas\sa\sreturn.\sOn\nx86,\sfloats\sare\sreturned\sin\ssp0.\sThe\sruntime\snow\snotices\sthat\sthe\ncalled\smethod\sis\snot\simplemented\sand\scalls\sforward::.\sForward\sthen\ncalls\sperformv::\sto\scall\sthe\sright\smethod.\sThe\smethod\sreturns\sa\sfloat\nand\sstores\sit\sin\ssp0.\sRemember\sthat\sboth,\sforward::\sand\sperformv::\nreturn\san\sid\s/\svoid*.\sperformv::\sreturns\snow\sand\safter\sthat,\sforward::\nreturns.\sThe\sreturn\sof\sthose\swas\salways\sput\sinto\seax,\sas\sthat's\show\nscalar\svalues\sare\sreturned\son\sx86.\sThe\soriginal\scaller\sof\sthe\smethod\ndoes\snot\sexpect\sany\sreturn\svalue\sin\seax,\sbut\sin\ssp0.\sThis\sworks,\sas\nno\scode\stouched\ssp0.\sHowever,\syou\scan\snot\srely\son\ssp0\snot\sbeing\ntouched.\sIt's\sjust\sluck\sthat\sthe\scompiler\sgenerates\scode\sthat\sdoes\snot\ntouch\ssp0.\n\nWhile\sthis\sworks\sfor\sforwarding\sdue\sto\sthe\sABI\son\sx86\s(and\sthe\sABIs\son\nmany\sother\splatforms\sallow\sthis\shack\sas\swell),\sthis\sfails\sif\syou\scall\nperformv::\sdirectly\son\sa\smethod\sreturning\sa\sfloat.\sIn\sthis\scase,\sthe\ncompiler\sdoes\snot\sexpect\sa\sreturn\svalue\sin\ssp0,\sbut\sin\seax,\sas\nperformv::\sis\sexpected\sto\sreturn\sid\s/\svoid*.\sTherefore\sthe\sbogus\svalue\nin\seax\swill\sbe\scasted\sto\sfloat\sand\sthe\sresult\swill\sbe\suseless.\n\nThis\sis\swhy\sI\sdecided\sto\sremove\sforwarding\sand\sperformv::\sfrom\slibobjfw\nfor\snow.\sIf\sI\sencounter\sa\ssituation\swhere\sI\sneed\sforwarding,\sI'm\sgoing\nto\simplement\sit\sin\sa\ssane\sway\sand\sNOT\sthe\sobjc\sway.\sThe\sforwarding\nmethods\sthis\scommit\sremoves\sdid\sit\sthe\sobjc\sway,\swhich\sis\sIMO\sjust\nwrong.\s(That\sway\swas\sok\sback\sthen\swhen\syou\sonly\shad\sscalar\sreturn\ntypes,\sbut\stoday\syou're\snot\slimited\sto\sscalar\sreturn\stypes\sanymore.)
D 2009-04-19T17:37:52
F LICENSE ae3c272ee81b620b28e044e8d89406b70103a4addb00ace5364837083e26efda
F Makefile 427824f052a1abcfa19d43620af94906530705a5dd0c470e7e8ee0d8c15d987b
F TODO 9efbe0a9f9ae0486846e8dfdd2f28cc7a054d73f1ea895d374b8bd92d4694ca6
F autogen.sh acec2711ea716bd75c913ed942b0a26d091e5afc818095540fa164ccf8160bbc x
F buildsys.mk.in 7300e92515109fd2ade6030dbeba1a991a7a357c7ffcdd993a095db1b85f0f31
F config.guess 9719765c11df4feacb4f2eb20098490dd3eadf076df56d33dadd45a5ac288a4a
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F configure.ac e131a02e5c4246c57ee8863a5d53017679fda9bc07349e28e4496027b4ee3f00
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F extra.mk.in cf1b4ce92e418f628b4a5bbd2147ed4968451f168b89adb9acca0c588b511576
F install-sh d2b9a1735ea9cc00de20990f69eeaa84f800cea83aa3ab81b71187b4ec4bf247
F m4/acx_pthread.m4 79f26df4aaedda733368764d371f7b35642a17dbf58f5f1daea71cf510aca175
F m4/ax_check_compiler_flags.m4 eb1353b82e355b5d0bc59d3913e3398fedd37a5fea27e44acbc25584576e42d6
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F src/Makefile 549491be054e4b11c4672d40bead940dbefac7ee3ae0382e23ce2a74532cb77b
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F src/OFArray.m b65574e4bc1af1db4c9dd64e70f42e6dc47249b487dab5346c100a7cc2b00bb7
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F src/OFConstString.h b313df502284a1de276f466344c7148c72c3785903b695860bcc30ae0c8408c5
F src/OFConstString.m 979d9dc5893bef09d44e032e583b77bafea791dfe50fe775d6c84f51388f3509
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F src/OFDictionary.m 065f154d58eb11c9b1a091ce4d5ea1f864b6b489236576f031c9b43c4ce27574
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F src/OFString.m 0784bdbb565d925f57b22a1c5b86ba2b04ba8221c8c65aeb384fe3a9b32623db
F src/OFTCPSocket.h bd7229eefe6ba3f3f36125fa26021ca2586185bf8f8431b31158cbf4e3318daa
F src/OFTCPSocket.m b0a40b2d84b1d7ab4bd78446c2ba0f926524589f1147ff1929826b4a66fe9e3e
F src/OFXMLFactory.h 5c64021065c787c511d9b3975174cb3499235607f6fbcf0b736cc9d8a65e6430
F src/OFXMLFactory.m 88fdb05c43662c0bae22ae98aaabab9d9eb2ab345a988cff519870e2c5b0fe26
F src/asprintf.c 163772d3d60a3c570564b05cfb30e70a6a2aa8dd6ffe78802438922c20e8d20f
F src/asprintf.h e7761a686f8dab5e43abfd4145ad00a07462246d2c4e7564fb2e9278eac7b738
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Z 06475076a21fa0338ccd0c191802df67