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[Gerry Boland <1364353@xxxxxxxxxxxxxxxxxx>]

Confirmed on my device. Using perf I see quite a few memory allocations
and frees happening while device is idle.

** Changed in: unity8 (Ubuntu)
       Status: New => Confirmed

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Title:
  unity8 leaking memory on idle phone

Status in Qt integration with the Mir display server:
  New
Status in “qtmir” package in Ubuntu:
  New
Status in “unity8” package in Ubuntu:
  Confirmed

Bug description:
  I've found that on an idle phone, unity8 is very slowly consuming more
  heap at around 1K every 15-20 minutes.   I ran my analysis over 12
  hours and found that there are brk()s occurring roughly every 10
  minutes and the heap is just increasing in size and never shrinking,
  indicating a small memory leak.

  gdb shows:

  (gdb) where
  #0  __brk (addr=0x31fa000) at ../ports/sysdeps/unix/sysv/linux/arm/brk.c:28
  #1  0xb6298826 in __GI___sbrk (increment=135168) at sbrk.c:53
  #2  0xb626209a in __GI___default_morecore (increment=<optimized out>)
      at morecore.c:47
  #3  0xb625f1e2 in sysmalloc (av=0xb62f54e8 <main_arena>, nb=72)
      at malloc.c:2462
  #4  _int_malloc (av=av@entry=0xb62f54e8 <main_arena>, bytes=bytes@entry=64)
      at malloc.c:3800
  #5  0xb6260576 in __GI___libc_malloc (bytes=64) at malloc.c:2891
  #6  0xb636d0f4 in operator new(unsigned int) ()
     from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
  #7  0xa92c2b42 in core::dbus::Message::Reader::Reader(std::shared_ptr<core::dbus::Message> const&) () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4
  #8  0xa92c2cc0 in core::dbus::Message::Reader::pop_variant() ()
     from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4
  #9  0xa9356a98 in core::dbus::Codec<core::dbus::types::Variant>::decode_argument(core::dbus::Message::Reader&, core::dbus::types::Variant&) ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #10 0xa9374608 in core::dbus::Result<core::dbus::types::TypedVariant<unsigned long long> >::from_message(std::shared_ptr<core::dbus::Message> const&) ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #11 0xa937484c in core::dbus::Result<core::dbus::types::TypedVariant<unsigned long long> > core::dbus::Object::invoke_method_synchronously<core::dbus::interface---Type <return> to continue, or q <return> to quit--- 
  s::Properties::Get, core::dbus::types::TypedVariant<unsigned long long>, std::string, std::string>(std::string const&, std::string const&) ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #12 0xa9374a98 in core::dbus::Property<mpris::Player::Properties::Position>::get() const () from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #13 0xa93c6f66 in AalMediaPlayerService::position() const ()
     from /usr/lib/arm-linux-gnueabihf/qt5/plugins/mediaservice/libaalmediaplayer.so
  #14 0xaaae6332 in QMediaPlayer::qt_metacall(QMetaObject::Call, int, void**) ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Multimedia.so.5
  #15 0xb65ac518 in QMetaProperty::read(QObject const*) const ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #16 0xaaaba3e2 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Multimedia.so.5
  Backtrace stopped: previous frame identical to this frame (corrupt stack?)

  and also:

  (gdb) where
  #0  __brk (addr=0x31d9000) at ../ports/sysdeps/unix/sysv/linux/arm/brk.c:28
  #1  0xb6298826 in __GI___sbrk (increment=135168) at sbrk.c:53
  #2  0xb626209a in __GI___default_morecore (increment=<optimized out>)
      at morecore.c:47
  #3  0xb625f1e2 in sysmalloc (av=0xb62f54e8 <main_arena>, nb=128)
      at malloc.c:2462
  #4  _int_malloc (av=av@entry=0xb62f54e8 <main_arena>, bytes=bytes@entry=120)
      at malloc.c:3800
  #5  0xb6260576 in __GI___libc_malloc (bytes=120) at malloc.c:2891
  #6  0xb636d0f4 in operator new(unsigned int) ()
     from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
  #7  0xb3f13224 in mir::scene::BasicSurface::compositor_snapshot(void const*) const () from /usr/lib/arm-linux-gnueabihf/libmirserver.so.24
  #8  0xad14caba in qtmir::MirSurfaceItem::dropPendingBuffers() ()
     from /usr/lib/arm-linux-gnueabihf/qt5/qml/Unity/Application/libunityapplicationplugin.so
  #9  0xb65c4274 in QMetaObject::activate(QObject*, int, int, void**) ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #10 0xb65cca36 in QTimer::timerEvent(QTimerEvent*) ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #11 0xb65c4eca in QObject::event(QEvent*) ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #12 0xb65a4f92 in QCoreApplication::notify(QObject*, QEvent*) ()
  ---Type <return> to continue, or q <return> to quit---
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #13 0xb65a4d88 in QCoreApplication::notifyInternal(QObject*, QEvent*) ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #14 0xb65de45a in QTimerInfoList::activateTimers() ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #15 0xb65de70c in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
  #16 0xb5dbbf50 in g_main_context_dispatch ()
     from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
  #17 0xb5dbc0fc in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0

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