59960 2011-05-02 14:11:54 -0700 CoreIPC/ArgumentDecoder should use aligned memory for its internal copy of data 2011-05-05 08:32:33 -0700 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) S60 Hardware S60 3rd edition RESOLVED FIXED P2 Normal --- 50251 1 s.mathur s.mathur andersca ap commit-queue darin oldest_to_newest 396648 0 s.mathur 2011-05-02 14:11:54 -0700 While debugging erratic page loading issues with the Symbian port of WebKit2 (patch in Bug 55877) , I observed that in ArgumentDecoder::initialize(), the fastMalloc will return an arbitrarily aligned address. m_buffer = static_cast<uint8_t*>(fastMalloc(bufferSize)); However, soon enough we attempt to unpack a uint64_t in the same function .. decodeUInt64(m_destinationID); .. and call alignBufferPosition(8, 8) which leads to a check of the alignment of the base address. For small messages (size 9 in my case), this leads to markInvalid() being called and then bad things happen with the state of the 2 processes. We should consider changing the fastMalloc(bufferSize) code to a slightly larger sized allocation which guarantees sizeof(uin64_t) alignment of the base address m_buffer. 397096 1 92080 s.mathur 2011-05-03 08:22:04 -0700 Created attachment 92080 Patch 397168 2 92080 andersca 2011-05-03 10:28:38 -0700 Comment on attachment 92080 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=92080&action=review > Source/WebKit2/ChangeLog:1 > +2011-05-03 Siddharth Mathur <siddharth mathur> No e-mail address here. > Source/WebKit2/Platform/CoreIPC/ArgumentDecoder.cpp:71 > + m_buffer = roundUpToAlignment(m_allocatedBase, expectedAlignment); If you want, you can assert that m_buffer is aligned here. 397309 3 92114 s.mathur 2011-05-03 13:26:30 -0700 Created attachment 92114 Patch with assert and fixed Changelog 398007 4 commit-queue 2011-05-04 09:58:11 -0700 The commit-queue encountered the following flaky tests while processing attachment 92114: http/tests/xmlhttprequest/remember-bad-password.html bug 51733 (author: ap@webkit.org) The commit-queue is continuing to process your patch. 398010 5 92114 commit-queue 2011-05-04 09:59:39 -0700 Comment on attachment 92114 Patch with assert and fixed Changelog Clearing flags on attachment: 92114 Committed r85755: <http://trac.webkit.org/changeset/85755> 398011 6 commit-queue 2011-05-04 09:59:47 -0700 All reviewed patches have been landed. Closing bug. 92080 2011-05-03 08:22:04 -0700 2011-05-03 13:26:30 -0700 Patch 59960_v1.patch text/plain 3679 s.mathur SW5kZXg6IFNvdXJjZS9XZWJLaXQyL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi S2l0Mi9DaGFuZ2VMb2cJKHJldmlzaW9uIDg1NjA0KQorKysgU291cmNlL1dlYktpdDIvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMjAgQEAKKzIwMTEtMDUtMDMgIFNpZGRoYXJ0 aCBNYXRodXIgIDxzaWRkaGFydGggbWF0aHVyPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9E WSAoT09QUyEpLgorCisgICAgICAgIEFyZ3VtZW50RGVjb2RlciBzaG91bGQgdXNlIGFsaWduZWQg bWVtb3J5IGZvciBpdHMgaW50ZXJuYWwgY29weSBvZiBkYXRhCisgICAgICAgIGh0dHBzOi8vYnVn cy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD01OTk2MCAKKworICAgICAgICBTaW5jZSB3ZSBl eHBlY3QgbWVtb3J5IGFsaWdubWVudCB3aGVuIHVucGFja2luZyBwcmltaXRpdmUgdHlwZXMgZnJv bSB0aGUgYnVmZmVyCisgICAgICAgIGluc3VyZSBhbGlnbm1lbnQgb2YgdGhlIGJhc2UgYWRkcmVz cyBvZiB0aGUgYnVmZmVyIHdoaWNoIGhvbGRzIHRoZSBlbmNvZGVkIG1lc3NhZ2UuCisgICAgICAg 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