)]}' { "log": [ { "commit": "8a0128a5ca0784f6d2b4ca27907e8967a74bc4c5", "tree": "0dec75200282ae5e49785395e97bd4e6459f1c09", "parents": [ "60438b46090d22bb9b978196f5aa53fab3b89759" ], "author": { "name": "Andreas Gampe", "email": "agampe@google.com", "time": "Mon Nov 28 07:38:35 2016 -0800" }, "committer": { "name": "Andreas Gampe", "email": "agampe@google.com", "time": "Tue Nov 29 11:11:46 2016 -0800" }, "message": "ART: Add dex::StringIndex\n\nAdd abstraction for uint32_t string index.\n\nTest: m test-art-host\nChange-Id: I917c2881702fe3df112c713f06980f2278ced7ed\n" }, { "commit": "0795f23920ee9aabf28e45c63cd592dcccf00216", "tree": "ff3f880c5e84f3316532b47d0e9a7729ade848ac", "parents": [ "d1224dce59eb0019507e41da5e10f12dda66bee4" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Tue Sep 27 18:43:30 2016 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Thu Sep 29 17:31:09 2016 -0700" }, "message": "Clean up ScopedThreadStateChange to use ObjPtr\n\nAlso fixed inclusion of -inl.h files in .h files by adding\nscoped_object_access-inl.h and scoped_fast_natvie_object_access-inl.h\n\nChanged AddLocalReference / Decode to use ObjPtr.\n\nChanged libartbenchmark to be debug to avoid linkage errors.\n\nBug: 31113334\n\nTest: test-art-host\n\nChange-Id: I4d2e160483a29d21e1e0e440585ed328b9811483\n" }, { "commit": "bb816d66aabb9c2a2e095517d2013041116332db", "tree": "1d51444ec1d6febfba8c2d6e9502bf76939261fa", "parents": [ "ddac139d83bfb121d1536fb40ab48c9bee6c25b1" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Wed Sep 07 10:17:46 2016 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Thu Sep 08 11:17:17 2016 -0700" }, "message": "Add transactions for string resolve\n\nFixes a bug where resolved strings can be left in the dex cache after\na transaction is rolled back even though the interned string was\nremoved.\n\nAdded test in transaction_test.\n\nBug: 31239436\n\nTest: test-art-host\n\nChange-Id: I42c67bcefeae8db134cde34c480261f52db4102e\n" }, { "commit": "e401d146407d61eeb99f8d6176b2ac13c4df1e33", "tree": "17927f9bfe7d2041b5942c89832d55f9dedb24c5", "parents": [ "2006b7b9b8e32722bd0d640c62549d8a0ac624b6" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Wed Apr 22 13:56:20 2015 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Fri May 29 18:45:49 2015 -0700" }, "message": "Move mirror::ArtMethod to native\n\nOptimizing + quick tests are passing, devices boot.\n\nTODO: Test and fix bugs in mips64.\n\nSaves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.\nSome of the savings are from removal of virtual methods and direct\nmethods object arrays.\n\nBug: 19264997\nChange-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d\n" }, { "commit": "3481ba2c4e4f3aa80d8c6d50a9f85dacb56b508b", "tree": "77551c0a6d060e5a3723ad35d2ab101038f9328a", "parents": [ "095d209342420563becfec6676b46a6c6b839107" ], "author": { "name": "Vladimir Marko", "email": "vmarko@google.com", "time": "Mon Apr 13 12:22:36 2015 +0100" }, "committer": { "name": "Vladimir Marko", "email": "vmarko@google.com", "time": "Mon Apr 13 16:30:13 2015 +0100" }, "message": "ART: Clean up includes.\n\nReduce dependencies to improve incremental build times.\nBreak up circular dependency involving class_linker-inl.h.\n\nChange-Id: I4be742c5c2b5cd9855beea86630fd68aab76b0db\n" }, { "commit": "c785344b87221f5e4e6473e5b762e4e61fe65dcf", "tree": "cd32ad2c2604596a18926f04d4c313dab255ecfd", "parents": [ "a29d93b380c9aeb8270e281aefbdd0c77a430d43" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Fri Mar 27 14:35:38 2015 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Fri Apr 10 12:57:27 2015 -0700" }, "message": "Move ArtField to native\n\nAdd linear alloc. Moved ArtField to be native object. Changed image\nwriter to put ArtFields after the mirror section.\n\nSavings:\n2MB on low ram devices\n4MB on normal devices\n\nTotal PSS measurements before (normal N5, 95s after shell start):\nImage size: 7729152 bytes\n23112 kB: .NonMoving\n23212 kB: .NonMoving\n22868 kB: .NonMoving\n23072 kB: .NonMoving\n22836 kB: .NonMoving\n19618 kB: .Zygote\n19850 kB: .Zygote\n19623 kB: .Zygote\n19924 kB: .Zygote\n19612 kB: .Zygote\nAvg: 42745.4 kB\n\nAfter:\nImage size: 7462912 bytes\n17440 kB: .NonMoving\n16776 kB: .NonMoving\n16804 kB: .NonMoving\n17812 kB: .NonMoving\n16820 kB: .NonMoving\n18788 kB: .Zygote\n18856 kB: .Zygote\n19064 kB: .Zygote\n18841 kB: .Zygote\n18629 kB: .Zygote\n3499 kB: .LinearAlloc\n3408 kB: .LinearAlloc\n3424 kB: .LinearAlloc\n3600 kB: .LinearAlloc\n3436 kB: .LinearAlloc\nAvg: 39439.4 kB\n\nNo reflection performance changes.\n\nBug: 19264997\nBug: 17643507\n\nChange-Id: I10c73a37913332080aeb978c7c94713bdfe4fe1c\n" }, { "commit": "2fd7e69505195cda4caaa3161aaf37315552a698", "tree": "2bd681443ad36a8616f237a12e56ecbdb7054f8e", "parents": [ "c6e949a6d93fae2351fc59ed825657adee8185dc" ], "author": { "name": "Sebastien Hertz", "email": "shertz@google.com", "time": "Thu Apr 02 11:11:19 2015 +0200" }, "committer": { "name": "Sebastien Hertz", "email": "shertz@google.com", "time": "Fri Apr 03 09:31:59 2015 +0200" }, "message": "Use specific exception class to abort transaction\n\nWe used to throw a java.lang.InternalError when aborting a\ntransaction (when preinitializing image classes at compilation time).\n\nWe now use dedicated class dalvik.system.TransactionAbortError that\nis only thrown by the compiler to abort a transaction. This class has\nconstructors taking a java.lang.Throwable \"cause\" so we can wrap\nexceptions causing the transaction to abort (for instance class\njava.lang.ClassNotFoundException) and give more information about the\ncause of the transaction abort.\n\nBug: 20019689\nChange-Id: I019a72a1c754d8bba6a7ad6bb0f02e4fd6668622\n" }, { "commit": "e15ea086439b41a805d164d2beb07b4ba96aaa97", "tree": "465ee3780acd8b7cb35c8a7f42a1f3c5df3d26ec", "parents": [ "0b25c71ac93fb10c484dbacb9e23db505a8e2353" ], "author": { "name": "Hiroshi Yamauchi", "email": "yamauchi@google.com", "time": "Mon Feb 09 17:11:42 2015 -0800" }, "committer": { "name": "Hiroshi Yamauchi", "email": "yamauchi@google.com", "time": "Tue Mar 03 17:33:18 2015 -0800" }, "message": "Reserve bits in the lock word for read barriers.\n\nThis prepares for the CC collector to use the standard object header\nmodel by storing the read barrier state in the lock word.\n\nBug: 19355854\nBug: 12687968\nChange-Id: Ia7585662dd2cebf0479a3e74f734afe5059fb70f\n" }, { "commit": "1c80becf5406cd6d95dc24bf47a0c5a3809ea281", "tree": "24853b3512e21b18df7a2401b174df891684334e", "parents": [ "e5deafe9cdd81238c3916b04301ea884c93f46b5" ], "author": { "name": "Sebastien Hertz", "email": "shertz@google.com", "time": "Tue Feb 03 11:58:06 2015 +0100" }, "committer": { "name": "Sebastien Hertz", "email": "shertz@google.com", "time": "Thu Feb 05 09:05:41 2015 +0100" }, "message": "Fix transaction aborting\n\nDuring compilation, a java.lang.InternalError is used to indicate\nthat class initialization failed and the enclosing transaction\nshould be aborted and the changes rolled back. However there is\nnothing preventing the code executed from a class initializer from\ncatching that exception (like catching Throwable and ignore it).\nTherefore we may return from the class initializer with no pending\nexception, even if the transaction was aborted, and not rollback\nthe changes properly.\n\nTo fix this, we now rely on the new Transaction::aborted_ field to\nknow whether a transaction aborted. When returning from the class\ninitializer without pending exception, we now check wether we aborted\nthe enclosing transaction. If that\u0027s the case, we set the status of\nthe class to kStatusError and throw a new java.lang.InternalError\nwith the original abort message.\n\nThis CL also contains some cleanup:\n- Renames Transaction::Abort to Transaction::Rollback which is less\nambiguous and more reflect what is done.\n- Moves the code throwing the java.lang.InternalError exception into\nthe Transaction::ThrowInternalError method so we do not duplicate\ncode. Now we may abort transaction more than once (because we may\nhave caught the java.lang.InternalError then execute code causing\nnew transaction abort), we only keep the first abort message to\nthrow the exception.\n- Updates transaction_test with more cases and more checks.\n- Bumps oat version to force recompilation with this fix.\n\nBug: 19202032\nChange-Id: Iedc6969528a68bbdf3123146e990df4dbc57834b\n" }, { "commit": "647b1a86f518d8db0331b3d52a96392b7a62504b", "tree": "7370f795ef3c7fbdd2695d23bc6f8171f40f43f1", "parents": [ "acfbbd4df2fc1c79a7102587bebf398f95b5e5de" ], "author": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Fri Oct 10 11:02:11 2014 -0700" }, "committer": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Fri Oct 10 12:26:02 2014 -0700" }, "message": "Fix 2 new sets of clang compiler warnings.\n\nFix issues that are flagged by -Wfloat-equal and -Wmissing-noreturn.\nIn the case of -Wfloat-equal the current cases in regular code are deliberate,\nso the change is to silence the warning. For gtest code the appropriate fix is\nto switch from EXPECT_EQ to EXPECT_(FLOAT|DOUBLE)_EQ.\nThe -Wmissing-noreturn warning isn\u0027t enabled due to a missing noreturn in\ngtest. This issue has been reported to gtest.\n\nChange-Id: Id84c70c21c542716c9ee0c41492e8ff8788c4ef8\n" }, { "commit": "f0edfc355893d53d1104b05501c99ad5ccf305c4", "tree": "7e1fa49875759512f5d02b1c45435d3e3366b920", "parents": [ "1ed5b27ee329208fd8ae22b8a9a61d708e2c1ffb" ], "author": { "name": "Hiroshi Yamauchi", "email": "yamauchi@google.com", "time": "Thu Sep 25 11:46:46 2014 -0700" }, "committer": { "name": "Hiroshi Yamauchi", "email": "yamauchi@google.com", "time": "Thu Sep 25 15:53:54 2014 -0700" }, "message": "Some optimizations for the array alloc path.\n\n- Force Array::Alloc() to be inlined.\n- Simplify the array size overflow check.\n- Turn fill_usable into a template parameter.\n- Remove a branch in Array::DataOffset() and avoid\n Primitive::ComponentSize(), which has a switch, in the array alloc\n path.\n- Strength reductions in the array size computation by using component\n size shifts instead of component sizes. Store component size shift\n in the upper 16 bits of primitive_type field.\n- Speedup: ~4% (3435-\u003e3284) in MemAllocTest on N4.\n\nBug: 9986565\n\nChange-Id: I4b142ffac4ab8b5b915836f1660a949d6442344c\n" }, { "commit": "5a4b8a236030460651a3136397d23ca6744e7eb7", "tree": "0e43891398e416d3fa77c7de391bf4db4408e8ee", "parents": [ "19f7c95491a053b818f914137fa73df0517b8792" ], "author": { "name": "Andreas Gampe", "email": "agampe@google.com", "time": "Thu Sep 11 08:30:08 2014 -0700" }, "committer": { "name": "Andreas Gampe", "email": "agampe@google.com", "time": "Mon Sep 15 19:50:12 2014 -0700" }, "message": "ART: Rename Handle hierarchy\n\nBring the names in line with normal OO principles: ConstHandle\nbecomes Handle, and Handle becomes MutableHandle.\n\nChange-Id: I0f018eb7ba28bc422e3a23dd73a6cbe6fc2d2044\n" }, { "commit": "7b078e8c04f3e1451dbdd18543c8b9692b5b067e", "tree": "414229c6b87eb20ea24c40780752da5a3999a49a", "parents": [ "f79ba17defbd9342e44ab9f3de0807054673d3c9" ], "author": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Wed Sep 10 14:44:24 2014 -0700" }, "committer": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Fri Sep 12 14:57:53 2014 -0700" }, "message": "Compile time performance improvements focusing on interpret-only.\n\nReduce virtual method dispatch in the method verifier and make more code\ninline-able.\nAdd a StringPiece with const char* equality operator to avoid redundant\nStringPieces and strlens.\nRemove back link from register line to verifier and pass as argument to reduce\nsize of RegisterLine.\nRemove instruction length from instruction flags and compute from the\ninstruction, again to reduce size.\nAdd suspend checks to resolve and verify to allow for more easy monitor\ninflation and reduce contention on Locks::thread_list_suspend_thread_lock_.\nChange ThrowEarlierClassFailure to throw pre-allocated exception.\nAvoid calls to Thread::Current() by passing self.\nTemplate specialize IsValidClassName.\nMake ANR reporting with SIGQUIT run using checkpoints rather than suspending\nall threads. This makes the stack/lock analysis less lock error prone.\nExtra Barrier assertions and condition variable time out is now returned as a\nboolean both from Barrier and ConditionVariable::Wait.\n\n2 threaded host x86-64 interpret-only numbers from 341 samples:\nBefore change: Avg 176.137ms 99% CI 3.468ms to 1060.770ms\nAfter change: Avg 139.163% 99% CI 3.027ms to 838.257ms\nReduction in average compile time after change is 20.9%.\nSlow-down without change is 26.5%.\n\nBug: 17471626 - Fix bug where RegTypeCache::JavaLangObject/String/Class/Throwable\ncould return unresolved type when class loading is disabled.\nBug: 17398101\n\nChange-Id: Id59ce3cc520701c6ecf612f7152498107bc40684\n" }, { "commit": "e63db27db913f1a88e2095a1ee8239b2bb9124e8", "tree": "893dee6783bca6717259321a6e4ba029c9c123e2", "parents": [ "07b8441303ea82fca3cb85d71ecf8752d73cedd7" ], "author": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Tue Jul 15 15:36:11 2014 -0700" }, "committer": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Tue Jul 15 17:07:49 2014 -0700" }, "message": "Break apart header files.\n\nCreate libart-gtest for common runtime and compiler gtest routines.\nRename CompilerCallbacksImpl that is quick compiler specific.\nRename trace clock source constants to not use the overloaded profiler term.\n\nChange-Id: I4aac4bdc7e7850c68335f81e59a390133b54e933\n" }, { "commit": "61c5ebc6aee2cac1c363de6fbdac25ada1697fdb", "tree": "444936c3e3718b692ba7f1981b863190f26b4ed7", "parents": [ "25c4f6a25b3de9b9d7ca5162f1629753a0b7f003" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Thu Jun 05 17:42:53 2014 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Fri Jun 06 13:12:17 2014 -0700" }, "message": "Change FieldHelper to use a handle.\n\nFixed compaction bugs related to FieldHelper::GetType in:\nartSet32InstanceFromCode\nSetFieldValueImpl\nCheckReceiver\nField_set\ninterpreter::DoFieldPut\nMethodVerifier::VerifyISGet\nMethodVerifier::VerifyISPut\nMethodVerifier::VerifyIGetQuick\n\nBug: 13077697\n\nChange-Id: I7de9ded2893b5568d43e4daa86fd135bf5508b72\n" }, { "commit": "eb8167a4f4d27fce0530f6724ab8032610cd146b", "tree": "bcfeaf13ad78f2dd68466bbd0e20c71944f7e854", "parents": [ "6fb66a2bc4e1c0b7931101153e58714991237af7" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Wed May 07 15:43:14 2014 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Tue May 13 14:45:54 2014 -0700" }, "message": "Add Handle/HandleScope and delete SirtRef.\n\nDelete SirtRef and replaced it with Handle. Handles are value types\nwhich wrap around StackReference*.\n\nRenamed StackIndirectReferenceTable to HandleScope.\n\nAdded a scoped handle wrapper which wraps around an Object** and\nrestores it in its destructor.\n\nRenamed Handle::get -\u003e Get.\n\nBug: 8473721\n\nChange-Id: Idbfebd4f35af629f0f43931b7c5184b334822c7a\n" }, { "commit": "4d7f61d44a732cfbc8573e5d93364983fd746888", "tree": "0ad34f9316227531696c01ba9b25a2175a5c5f65", "parents": [ "425640d6fac3432a44e236a002e8401a7cd59c5c" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Thu Apr 17 14:43:39 2014 -0700" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Thu Apr 17 15:56:47 2014 -0700" }, "message": "Use non volatile lock words in semispace collector.\n\nGSS FormulaEvaluationActions.EvaluateAndApplyChanges:\nBefore GC time: 9.1s\nAfter GC time: 7.98s\n\nFixed timing logger errors.\n\nChange-Id: I4193c6ccbbbe7a7220dfaabbf3472a5dcebae616\n" }, { "commit": "53b8b09fc80329539585dcf43657bc5f4ecefdff", "tree": "cac0f82fbb89bd907104e3fed6c36203e11a3de0", "parents": [ "0dea9872082bc3e576ed6cefed86b0d6c0c45ffd" ], "author": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Thu Mar 13 23:45:53 2014 -0700" }, "committer": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Fri Mar 14 11:28:10 2014 -0700" }, "message": "Refactor reflective method invocation.\n\nMove invocation code out of JNI internal into reflection, including ArgArray\ncode. Make reflective invocation use the ArgArray to build arguments rather\nthan allocating a jvalue[] and unboxing arguments into that.\nMove reflection part of jni_internal_test into reflection_test.\nMake greater use of fast JNI.\n\nChange-Id: Ib381372df5f9a83679e30e7275de24fa0e6b1057\n" }, { "commit": "661974a5561e5ccdfbac8cb5d8df8b7e6f3483b8", "tree": "02e428694277d85a98505f8e814aba378fc7651c", "parents": [ "3cd52df3d740f8a656233b199dfcaab165f415ff" ], "author": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Thu Jan 09 11:23:53 2014 -0800" }, "committer": { "name": "Mathieu Chartier", "email": "mathieuc@google.com", "time": "Wed Mar 05 12:44:22 2014 -0800" }, "message": "Fix valgrind gtests and memory leaks.\n\nAll tests pass other than image_test which passes if some bad reads\nare disabled (buzbee working on this).\n\nChange-Id: Ifd6b6e3aed0bc867703b6e818353a9f296609422\n" }, { "commit": "6fac447555dc94a935b78198479cce645c837b89", "tree": "bcf1449999084b1e1dec3dac287f6f3670d7eda0", "parents": [ "7f0ff7e7fff82566bca5f9353eaa2c4f81f0671a" ], "author": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Tue Feb 25 17:01:10 2014 -0800" }, "committer": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Wed Feb 26 16:38:22 2014 -0800" }, "message": "Make allocations report usable size.\n\nWork-in-progress to allow arrays to fill usable size. Bug: 13028925.\nUse C++11\u0027s override keyword on GCC \u003e\u003d 2.7 to ensure that we override GC and\nallocator methods.\nMove initial mirror::Class set up into a Functor so that all allocated objects\nhave non-zero sizes. Use this property to assert that all objects are never\nlarger than their usable size.\nOther bits of GC related clean-up, missing initialization, missing use of\nconst, hot methods in .cc files, \"unimplemented\" functions that fail at\nruntime in header files, reducing header file includes, move valgrind\u0027s space\ninto its own files, reduce number of array allocation routines.\n\nChange-Id: Id5760041a2d7f94dcaf17ec760f6095ec75dadaa\n" }, { "commit": "a1ce1fef2d49d1d537776a5308ace7102a815fe5", "tree": "a1afe850d9ebd21f4b751eb68e1ec3dc60dab001", "parents": [ "930f7b843ddc6e6530439d3fdb0e2133a6292f1e" ], "author": { "name": "Brian Carlstrom", "email": "bdc@google.com", "time": "Mon Feb 24 23:23:58 2014 -0800" }, "committer": { "name": "Brian Carlstrom", "email": "bdc@google.com", "time": "Wed Feb 26 13:17:44 2014 -0800" }, "message": "Split up CommonTest into CommonRuntimeTest and CommonCompilerTest\n\nChange-Id: I8dcf6b29a5aecd445f1a3ddb06386cf81dbc9c70\n" }, { "commit": "9837939678bb5dcba178e5fb00ed59b5d14c8d9b", "tree": "00f0e6b54d7c4cac78a02752e268724157e50b6e", "parents": [ "3fcf18e25241253f23efbeebe77b2a4c4a7c54d3" ], "author": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Mon Feb 24 16:53:16 2014 -0800" }, "committer": { "name": "Ian Rogers", "email": "irogers@google.com", "time": "Mon Feb 24 18:47:23 2014 -0800" }, "message": "Avoid std::string allocations for finding an array class.\n\nIntroduce ClassLinker::FindArrayClass which performs an array class lookup\ngiven the element/component class. This has a 16 element cache of recently\nlooked up arrays.\nPass the current thread to ClassLinker Find .. Class routines to avoid calls\nto Thread::Current().\nAvoid some uses of FindClass in the debugger where WellKnownClasses is a\nfaster and more compacting GC friendly alternative.\n\nChange-Id: I60e231820b349543a7edb3ceb9cf1ce92db3c843\n" }, { "commit": "d2fe10a3a34af171bf1631219cd2d6ff6b7778b5", "tree": "b6b7eb8eba23a5c2723518da99c03bf47b97f58a", "parents": [ "5a3f55ad9519e87c0d3bbddaf3d8a186a887a79b" ], "author": { "name": "Sebastien Hertz", "email": "shertz@google.com", "time": "Wed Jan 15 10:20:56 2014 +0100" }, "committer": { "name": "Sebastien Hertz", "email": "shertz@google.com", "time": "Mon Feb 17 11:32:15 2014 +0100" }, "message": "Remove blacklist\n\nRemoves the class initialization blacklist and use transaction to detect and\nrevert class initialization attempting to invoke native method. This only\nconcerns class initialization happening at compilation time when generating an\nimage (like boot.art for the system).\n\nIn transactional mode, we log every object\u0027s field assignment and array update.\nTherefore we\u0027re able to abort a transaction to restore values of fields and\narray as they were before the transaction starts. We also log changes to the\nintern string table so we can restore its state prior to transaction start.\n\nSince transactional mode only happens at compilation time, we don\u0027t need to log\nall these changes at runtime. In order to reduce the overhead of testing if\ntransactional mode is on/off, we templatize interfaces of mirror::Object and\nmirror::Array, respectively responsible for setting a field and setting an\narray element.\n\nFor various reasons, we skip some specific fields from transaction:\n- Object\u0027s class and array\u0027s length must remain unchanged so garbage collector\ncan compute object\u0027s size.\n- Immutable fields only set during class loading: list of fields, method,\ndex caches, vtables, ... as all classes have been loaded and verified before a\ntransaction occurs.\n- Object\u0027s monitor for performance reason.\n\nBefore generating the image, we browse the heap to collect objects that need to\nbe written into it. Since the heap may still holds references to unreachable\nobjects due to aborted transactions, we trigger one collection at the end of\nthe class preinitialization phase.\n\nSince the transaction is held by the runtime and all compilation threads share\nthe same runtime, we need to ensure only one compilation thread has exclusive\naccess to the runtime. To workaround this issue, we force class initialization\nphase to run with only one thread. Note this is only done when generating image\nso application compilation is not impacted. This issue will be addressed in a\nseparate CL.\n\nBug: 9676614\nChange-Id: I221910a9183a5ba6c2b99a277f5a5a68bc69b5f9\n" } ] }