touch-packages team mailing list archive

[Timo Jyrinki <timo.jyrinki@xxxxxxxxxxxxx>]

Thanks Lorn! I've pushed another build to the qt5-daily PPA with the
previous patch replaced by that new find. It will be ready for testing
on armhf in around 2 hours.

The bug is currently not rtm tagged so this can wait a bit, especially
with another rtm bug related qtdeclarative landing brewing at the moment
by ricmm.

This new fix, if it fixes the problem, is not in Qt 5.3.2 so we will
need to cherry-pick this anyway, even if we'd land 5.3.2 in November or
so.

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https://bugs.launchpad.net/bugs/1373039

Title:
  Crash in QML compiler if terminated whilst compiling asynchronous
  components

Status in “qtdeclarative-opensource-src” package in Ubuntu:
  Confirmed

Bug description:
  Reproducible on mako and krillin using devel-proposed r248 or rtm r50

  This is easiest to reproduce with the camera-app, as this has a number
  of large components that get loaded asynchronously on start-up,
  however I believe it should be possible to trigger in any app that
  contains asynchronous Loaders.

  Steps to reproduce

  1. Start camera-app

  2. Whilst loading, swipe to the app switcher.

  3. Close camera-app.

  Expected result

  App closes cleanly

  Actual result

  Sometimes the app segfaults whilst closing

  It may take multiple attempts to cause a crash, as the SIGTERM signal
  has to be received at a certain point during the compilation process
  for the crash to occur.

  
  Back trace of an example crash:

  "There are still "1" items in the process of being created at engine destruction."
  [Thread 0xac267450 (LWP 5576) exited]

  Program received signal SIGSEGV, Segmentation fault.
  [Switching to Thread 0xb1a3e450 (LWP 5561)]
  0xb6618dd6 in createNode (left=false, parent=0x0, v=@0x31: <error reading variable>, k=@0x2d: <error reading variable>, this=0xae598538)
      at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:216
  216                 new (&n->key) Key(k);
  (gdb) bt
  #0  0xb6618dd6 in createNode (left=false, parent=0x0, v=@0x31: <error reading variable>, k=@0x2d: <error reading variable>, this=0xae598538)
      at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:216
  #1  QMapNode<unsigned int, QV4::ExecutableAllocator::ChunkOfPages*>::copy (this=0x21, d=d@entry=0xae598538)
      at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:246
  #2  0xb6618e02 in QMapNode<unsigned int, QV4::ExecutableAllocator::ChunkOfPages*>::copy (this=0xb11a5c28, d=d@entry=0xae598538)
      at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:249
  #3  0xb6618e02 in QMapNode<unsigned int, QV4::ExecutableAllocator::ChunkOfPages*>::copy (this=0xae54a2f8, d=d@entry=0xae598538)
      at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:249
  #4  0xb6618e4e in QMap<unsigned int, QV4::ExecutableAllocator::ChunkOfPages*>::detach_helper (this=0x6ae34)
      at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:969
  #5  0xb6618950 in detach (this=0x6ae34) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:378
  #6  insert (avalue=<synthetic pointer>, akey=<optimized out>, this=0x6ae34) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmap.h:676
  #7  QV4::ExecutableAllocator::allocate (this=0x6ae30, size=592, size@entry=578) at jsruntime/qv4executableallocator.cpp:179
  #8  0xb65bc900 in ExecutableMemoryHandle (size=578, allocator=<optimized out>, this=0xae5af100) at ../3rdparty/masm/stubs/ExecutableAllocator.h:66
  #9  allocate (size=578, this=0xb1a3cfbc) at ../3rdparty/masm/stubs/ExecutableAllocator.h:97
  #10 JSC::LinkBuffer::linkCode (this=this@entry=0xb1a3d068, ownerUID=ownerUID@entry=0x0, effort=effort@entry=JSC::JITCompilationMustSucceed)
      at ../3rdparty/masm/assembler/LinkBuffer.cpp:79
  #11 0xb65b18de in LinkBuffer (effort=JSC::JITCompilationMustSucceed, ownerUID=0x0, masm=0xae5a9aa0, globalData=..., this=0xb1a3d068)
      at ../3rdparty/masm/assembler/LinkBuffer.h:92
  #12 QV4::JIT::Assembler::link (this=0xae5a9aa0, codeSize=codeSize@entry=0xb1a3d0e8) at jit/qv4isel_masm.cpp:141
  #13 0xb65b2918 in QV4::JIT::InstructionSelection::run (this=<optimized out>, functionIndex=<optimized out>) at jit/qv4isel_masm.cpp:360
  #14 0xb65658f0 in QV4::EvalInstructionSelection::compile (this=this@entry=0xae564070, generateUnitData=generateUnitData@entry=false)
      at compiler/qv4isel_p.cpp:85
  #15 0xb6617608 in QV4::Script::precompile (module=module@entry=0xb1a3d460, unitGenerator=unitGenerator@entry=0xb1a3d49c, engine=engine@entry=0x6b290,
      url=..., source=..., reportedErrors=reportedErrors@entry=0xb1a3d414) at jsruntime/qv4script.cpp:397
  #16 0xb666b5ac in QQmlScriptBlob::dataReceived (this=0xae5a8a18, data=...) at qml/qqmltypeloader.cpp:2698
  #17 0xb66650ac in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0xae5a8a18, d=...) at qml/qqmltypeloader.cpp:1198
  #18 0xb6665292 in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0xae5a8a18, file=file@entry=0xb1a3d558)
      at qml/qqmltypeloader.cpp:1190
  #19 0xb66679f8 in QQmlDataLoader::loadThread (this=this@entry=0x6ac44, blob=blob@entry=0xae5a8a18) at qml/qqmltypeloader.cpp:1068
  #20 0xb6667dd2 in QQmlDataLoader::load (this=0x6ac44, blob=0xae5a8a18, mode=QQmlDataLoader::PreferSynchronous) at qml/qqmltypeloader.cpp:932
  #21 0xb6667fc2 in QQmlTypeLoader::getScript (this=0x6ac44, url=...) at qml/qqmltypeloader.cpp:1649
  #22 0xb666a818 in QQmlTypeLoader::Blob::addImport (this=this@entry=0xb11033f0, import=import@entry=0xae58a7c0, errors=errors@entry=0xb1a3d67c)
      at qml/qqmltypeloader.cpp:1312
  #23 0xb666aaa8 in QQmlTypeData::continueLoadFromIR (this=this@entry=0xb11033f0) at qml/qqmltypeloader.cpp:2267
  #24 0xb666afda in QQmlTypeData::dataReceived (this=0xb11033f0, data=...) at qml/qqmltypeloader.cpp:2224
  #25 0xb66650ac in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0xb11033f0, d=...) at qml/qqmltypeloader.cpp:1198
  #26 0xb6665292 in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0xb11033f0, file=file@entry=0xb1a3d7a0)
      at qml/qqmltypeloader.cpp:1190
  #27 0xb66679f8 in QQmlDataLoader::loadThread (this=this@entry=0x6ac44, blob=blob@entry=0xb11033f0) at qml/qqmltypeloader.cpp:1068
  #28 0xb6667dd2 in QQmlDataLoader::load (this=0x6ac44, blob=0xb11033f0, mode=QQmlDataLoader::PreferSynchronous) at qml/qqmltypeloader.cpp:932
  #29 0xb6667eaa in QQmlTypeLoader::getType (this=this@entry=0x6ac44, url=..., mode=mode@entry=QQmlDataLoader::PreferSynchronous)
      at qml/qqmltypeloader.cpp:1606
  #30 0xb666912c in QQmlTypeData::resolveTypes (this=0xae549db8) at qml/qqmltypeloader.cpp:2452
  #31 0xb6669710 in QQmlTypeData::allDependenciesDone (this=0xae549db8) at qml/qqmltypeloader.cpp:2312
  #32 0xb666510e in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0xae549db8, d=...) at qml/qqmltypeloader.cpp:1201
  #33 0xb6665292 in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0xae549db8, file=file@entry=0xb1a3d9b8)
      at qml/qqmltypeloader.cpp:1190
  #34 0xb66679f8 in QQmlDataLoader::loadThread (this=this@entry=0x6ac44, blob=blob@entry=0xae549db8) at qml/qqmltypeloader.cpp:1068
  #35 0xb6667dd2 in QQmlDataLoader::load (this=0x6ac44, blob=0xae549db8, mode=QQmlDataLoader::PreferSynchronous) at qml/qqmltypeloader.cpp:932
  #36 0xb6667eaa in QQmlTypeLoader::getType (this=this@entry=0x6ac44, url=..., mode=mode@entry=QQmlDataLoader::PreferSynchronous)
      at qml/qqmltypeloader.cpp:1606
  #37 0xb666912c in QQmlTypeData::resolveTypes (this=0x18ee08) at qml/qqmltypeloader.cpp:2452
  #38 0xb6669710 in QQmlTypeData::allDependenciesDone (this=0x18ee08) at qml/qqmltypeloader.cpp:2312
  #39 0xb666510e in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0x18ee08, d=...) at qml/qqmltypeloader.cpp:1201
  #40 0xb6665292 in QQmlDataLoader::setData (this=this@entry=0x6ac44, blob=blob@entry=0x18ee08, file=file@entry=0xb1a3dbd0)
      at qml/qqmltypeloader.cpp:1190
  #41 0xb66679f8 in QQmlDataLoader::loadThread (this=0x6ac44, blob=blob@entry=0x18ee08) at qml/qqmltypeloader.cpp:1068
  #42 0xb6667d32 in QQmlDataLoaderThread::loadThread (this=<optimized out>, b=0x18ee08) at qml/qqmltypeloader.cpp:816
  #43 0xb66a2320 in QQmlThreadPrivate::threadEvent (this=0x6ad08) at qml/ftw/qqmlthread.cpp:198
  #44 0xb66a26e8 in QQmlThreadPrivate::event (this=0x6ad08, e=<optimized out>) at qml/ftw/qqmlthread.cpp:136
  #45 0xb6e11f92 in QCoreApplication::notify(QObject*, QEvent*) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #46 0xb6e11d88 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #47 0xb6e138ae in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #48 0xb6e4bea8 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #49 0xb5facf58 in g_main_context_dispatch () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
  #50 0xb5fad104 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
  Backtrace stopped: previous frame identical to this frame (corrupt stack?)

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