| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="solariscodedumper">
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| 4 | <title>Configuring the Oracle VM VirtualBox CoreDumper on Oracle Solaris Hosts</title>
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| 5 |
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| 6 | <body>
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| 7 | <p>
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| 8 | Oracle VM VirtualBox is capable of producing its own core files for
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| 9 | extensive debugging when things go wrong. Currently this is only
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| 10 | available on Oracle Solaris hosts.
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| 11 | </p>
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| 12 | <p>
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| 13 | The Oracle VM VirtualBox CoreDumper can be enabled using the following
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| 14 | command:
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| 15 | </p>
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| 16 | <pre xml:space="preserve">$ VBoxManage setextradata <varname>VM-name</varname> VBoxInternal2/CoreDumpEnabled 1</pre>
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| 17 | <p>
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| 18 | You can specify which directory to use for core dumps with this
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| 19 | command, as follows:
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| 20 | </p>
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| 21 | <pre xml:space="preserve">$ VBoxManage setextradata <varname>VM-name</varname> VBoxInternal2/CoreDumpDir <varname>path-to-directory</varname>
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| 22 | </pre>
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| 23 | <p>
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| 24 | Make sure the directory you specify is on a volume with sufficient
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| 25 | free space and that the Oracle VM VirtualBox process has sufficient
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| 26 | permissions to write files to this directory. If you skip this
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| 27 | command and do not specify any core dump directory, the current
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| 28 | directory of the Oracle VM VirtualBox executable will be used. This
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| 29 | would most likely fail when writing cores as they are protected
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| 30 | with root permissions. It is recommended you explicitly set a core
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| 31 | dump directory.
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| 32 | </p>
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| 33 | <p>
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| 34 | You must specify when the Oracle VM VirtualBox CoreDumper should be
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| 35 | triggered. This is done using the following commands:
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| 36 | </p>
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| 37 | <pre xml:space="preserve">$ VBoxManage setextradata <varname>VM-name</varname> VBoxInternal2/CoreDumpReplaceSystemDump 1
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| 38 | $ VBoxManage setextradata <varname>VM-name</varname> VBoxInternal2/CoreDumpLive 1</pre>
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| 39 | <p>
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| 40 | At least one of the above two commands will have to be provided if
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| 41 | you have enabled the Oracle VM VirtualBox CoreDumper.
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| 42 | </p>
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| 43 | <p>
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| 44 | Setting <codeph>CoreDumpReplaceSystemDump</codeph> sets up the
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| 45 | VM to override the host's core dumping mechanism and in the event
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| 46 | of any crash only the Oracle VM VirtualBox CoreDumper would produce the
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| 47 | core file.
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| 48 | </p>
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| 49 | <p>
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| 50 | Setting <codeph>CoreDumpLive</codeph> sets up the VM to produce
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| 51 | cores whenever the VM process receives a
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| 52 | <codeph>SIGUSR2</codeph> signal. After producing the core file,
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| 53 | the VM will not be terminated and will continue to run. You can
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| 54 | thus take cores of the VM process using the following command:
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| 55 | </p>
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| 56 | <pre xml:space="preserve">$ kill -s SIGUSR2 <varname>VM-process-id</varname>
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| 57 | </pre>
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| 58 | <p>
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| 59 | The Oracle VM VirtualBox CoreDumper creates core files of the form
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| 60 | <filepath>core.vb.<varname>process-name</varname>.<varname>process-ID</varname>
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| 61 | </filepath>
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| 62 | such as <filepath>core.vb.VBoxHeadless.11321</filepath>.
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| 63 | </p>
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| 64 | </body>
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| 65 |
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| 66 | </topic>
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