53506 2011-02-01 09:54:03 -0800 Modify RandomNumberSeed.h to use USE(MERSENNE_TWISTER_19937) 2011-02-01 11:32:42 -0800 1 1 1 Unclassified WebKit Web Template Framework 528+ (Nightly build) PC Other RESOLVED FIXED P2 Normal --- 53253 1 dbates dbates abarth buildbot dglazkov eric paroga webkit.review.bot oldest_to_newest 343281 0 dbates 2011-02-01 09:54:03 -0800 Following up from bug #53253, we should guard code in RandomNumberSeed.h that uses the Mersenne Twister pseudorandom number generator with USE(MERSENNE_TWISTER_19937). 343302 1 80780 dbates 2011-02-01 10:12:03 -0800 Created attachment 80780 Patch I filed bug #53508 to add support for the Mersenne Twister PRNG for all ports that don't use srand(3) and rand(3). I am open to suggestions on how best to write this patch. 343307 2 webkit.review.bot 2011-02-01 10:15:13 -0800 Attachment 80780 did not build on chromium: Build output: http://queues.webkit.org/results/7680840 343309 3 paroga 2011-02-01 10:18:21 -0800 I don't like the return. What about the following? #if OS(DARWIN) // On Darwin we use arc4random which initialises itself. #elif OS(WINCE) // initialize rand() srand(GetTickCount()); #elif COMPILER(MSVC) && defined(_CRT_RAND_S) // On Windows we use rand_s which initialises itself #elif PLATFORM(BREWMP) // On Brew MP we use AEECLSID_RANDOM which initialises itself #elif OS(UNIX) // srandomdev is not guaranteed to exist on linux so we use this poor seed, this should be improved timeval time; gettimeofday(&time, 0); srandom(static_cast<unsigned>(time.tv_usec * getpid())); #else srand(static_cast<unsigned>(time(0))); #endif #if USE(MERSENNE_TWISTER_19937) // use rand() to initialize the Mersenne Twister random number generator. unsigned long initializationBuffer[4]; initializationBuffer[0] = (rand() << 16) | rand(); initializationBuffer[1] = (rand() << 16) | rand(); initializationBuffer[2] = (rand() << 16) | rand(); initializationBuffer[3] = (rand() << 16) | rand(); init_by_array(initializationBuffer, 4); #endif 343310 4 80781 dbates 2011-02-01 10:20:58 -0800 Created attachment 80781 Patch Updated patch. 343317 5 80781 paroga 2011-02-01 10:26:23 -0800 Comment on attachment 80781 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=80781&action=review > Source/JavaScriptCore/wtf/RandomNumberSeed.h:71 > +// FIXME: Add Mersenne Twister support for platforms that don't use srand(3) and rand(3). > +// See <https://bugs.webkit.org/show_bug.cgi?id=53508>. Is there any value in this comments? Other ports don't use rand and _don't_ need Mersenne Twister. (See comments above.) 343323 6 dbates 2011-02-01 10:28:15 -0800 (In reply to comment #5) > (From update of attachment 80781 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=80781&action=review > > > Source/JavaScriptCore/wtf/RandomNumberSeed.h:71 > > +// FIXME: Add Mersenne Twister support for platforms that don't use srand(3) and rand(3). > > +// See <https://bugs.webkit.org/show_bug.cgi?id=53508>. > > Is there any value in this comments? Other ports don't use rand and _don't_ need Mersenne Twister. (See comments above.) Will remove it. 343329 7 80783 dbates 2011-02-01 10:32:13 -0800 Created attachment 80783 Patch Updated patch based on Patrick Gansterer's comment and marked bug #53508 as invalid. 343342 8 dbates 2011-02-01 10:50:43 -0800 Committed r77260: <http://trac.webkit.org/changeset/77260> 343344 9 buildbot 2011-02-01 10:51:04 -0800 Attachment 80780 did not build on win: Build output: http://queues.webkit.org/results/7680852 343378 10 webkit.review.bot 2011-02-01 11:32:42 -0800 http://trac.webkit.org/changeset/77260 might have broken SnowLeopard Intel Release (Tests) 80780 2011-02-01 10:12:03 -0800 2011-02-01 10:20:58 -0800 Patch Bug53506.patch text/plain 3271 dbates SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gNzcyNTQpCisrKyBTb3VyY2Uv SmF2YVNjcmlwdENvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMTggQEAK 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