[vbox-dev] Trying to launch the a machine from the XPCOM sample crashes VBoxSVC

[Rūdolfs Bundulis]

While trying to investigate the access issue i posted in a separate thread (
https://www.virtualbox.org/pipermail/vbox-dev/2016-May/013828.html), I
tried to modify the xpcom sample to try and launch a VM to check if
anything specific is wrong with my binaries. Basically I just added a block
of code that would attempt to launch the machine in the void
listVMs(IVirtualBox *virtualBox) function:

nsCOMPtr<ISession> session;
rc = machine->LockMachine(session, LockType_VM);
if (NS_SUCCEEDED(rc))
{
  nsCOMPtr<IConsole> console;
  rc  = session->GetConsole(getter_AddRefs(console));
  if (NS_SUCCEEDED(rc))
  {
    nsCOMPtr<IProgress> progress;
    rc = console->PowerUp(getter_AddRefs(progress));
    if (NS_SUCCEEDED(rc))
    {
      progress->WaitForCompletion(-1);
    }
    else
    {
      printf("Could not power up the console: 0x%08x\n", rc);
    }
  }
  else
  {
    printf("Could not obtain console from the machine: 0x%08x\n", rc);
  }
}
else
{
  printf("Could not lock the machine: 0x%08x\n", rc);
}
/* don't forget to release the objects in the array... */
machine->Release();

Compiling and running this makes VBoxSVC crash and the call to LockMachine
fail with NS_ERROR_ABORT (*0x80004004*).

The VBoxSVC.log basically just stops:

VirtualBox XPCOM Server 5.0.20 r106931 linux.amd64 (Apr 28 2016 14:08:17)
release log
00:00:00.000387 main     Log opened 2016-05-09T06:50:16.364856000Z
00:00:00.000390 main     Build Type: release
00:00:00.000395 main     OS Product: Linux
00:00:00.000396 main     OS Release: 4.4.0-22-generic
00:00:00.000397 main     OS Version: #39-Ubuntu SMP Thu May 5 16:53:32 UTC
2016
00:00:00.000431 main     DMI Product Name: Z9PE-D16 Series
00:00:00.000442 main     DMI Product Version: 1.0X
00:00:00.000531 main     Host RAM: 15993MB total, 14686MB available
00:00:00.000536 main     Executable: /usr/lib/virtualbox/VBoxSVC
00:00:00.000537 main     Process ID: 4240
00:00:00.000538 main     Package type: LINUX_64BITS_UBUNTU_16_04
00:00:00.107500 nspr-2   Home directory: '/home/rudolfs/.config/VirtualBox'
00:00:00.107849 nspr-2   Loading settings file
"/home/rudolfs/.config/VirtualBox/VirtualBox.xml" with version "1.12-linux"
00:00:00.110140 nspr-2   Successfully initialised host USB using sysfs
00:00:00.112014 nspr-2   HostDnsMonitor: old information
00:00:00.112053 nspr-2     no server entries
00:00:00.112063 nspr-2     no search string entries
00:00:00.112069 nspr-2     no domain set
00:00:00.112074 nspr-2   HostDnsMonitor: new information
00:00:00.112079 nspr-2     server 1: 192.168.1.1
00:00:00.112086 nspr-2     search string 1: homerouter.cpe
00:00:00.112093 nspr-2     domain: homerouter.cpe
00:00:00.112108 nspr-2   HostDnsMonitorProxy::notify
00:00:00.115814 nspr-2   VD: VDInit finished
00:00:00.124915 nspr-2   Loading settings file "/home/rudolfs/VirtualBox
VMs/Windows 7 XPDM/Windows 7 XPDM.vbox" with version "1.15-linux"

I've uploaded the .crash file from /var/crash to Google Drive since it was
too big to post here:
https://drive.google.com/open?id=0BxZxYDtgrhYKZFQtZ2QwWlRyeFk

Best Regards,
Rudolfs Bundulis
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